{"id":2604,"date":"2025-10-01T11:14:59","date_gmt":"2025-10-01T11:14:59","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-10-01T11:14:59","modified_gmt":"2025-10-01T11:14:59","slug":"essential-guide-to-hardness-testing-avoid-costly-material-failures","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/essential-guide-to-hardness-testing-avoid-costly-material-failures\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn C\u1ea7n Thi\u1ebft v\u1ec1 Ki\u1ec3m Tra \u0110\u1ed9 C\u1ee9ng: Tr\u00e1nh C\u00e1c H\u1ecfng H\u1ecfng \u0110\u1eaft \u0110\u1ecf c\u1ee7a V\u1eadt Li\u1ec7u"},"content":{"rendered":"<h2>H\u01b0\u1edbng D\u1eabn v\u1ec1 Ki\u1ec3m Tra \u0110\u1ed9 C\u1ee9ng: Hi\u1ec3u C\u00e1ch V\u1eadt Li\u1ec7u Ch\u1ed1ng L\u1ea1i L\u1ef1c<\/h2>\n<h2>Gi\u1edbi Thi\u1ec7u: T\u1ea1i Sao Ki\u1ebfn Th\u1ee9c N\u00e0y Quan Tr\u1ecdng<\/h2>\n<p>Ch\u00fang t\u00f4i t\u1eebng xem x\u00e9t m\u1ed9t s\u1ef1 c\u1ed1 nghi\u00eam tr\u1ecdng trong m\u1ed9t b\u1ed9 l\u1eafp r\u00e1p bu-l\u00f4ng ch\u1ecbu t\u1ea3i cao. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a th\u00e0nh ph\u1ea7n y\u00eau c\u1ea7u \u0111\u1ed9 c\u1ee9ng l\u00f5i c\u1ee5 th\u1ec3, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra x\u00e1c nh\u1eadn b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p th\u1eed Rockwell ti\u00eau chu\u1ea9n. C\u00e1c b\u1ed9 ph\u1eadn \u0111\u00e3 v\u01b0\u1ee3t qua. V\u00e0i tu\u1ea7n sau, c\u00e1c bu-l\u00f4ng b\u1ecb h\u1ecfng trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng. Cu\u1ed9c \u0111i\u1ec1u tra \u0111\u00e3 ph\u00e1t hi\u1ec7n ra v\u1ea5n \u0111\u1ec1: qu\u00e1 tr\u00ecnh m\u1ea1 ph\u1ee7 b\u1ecb l\u1ed7i \u0111\u00e3 g\u00e2y ra \u0111\u1ed9 gi\u00f2n nghi\u00eam tr\u1ecdng tr\u00ean b\u1ec1 m\u1eb7t. Ph\u01b0\u01a1ng ph\u00e1p th\u1eed ti\u00eau chu\u1ea9n, <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-cast-iron-parts-properties-design-manufacturing-secrets\/\"  data-wpil-monitor-id=\"492\" target=\"_blank\">\u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111o c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt ch\u1ea5t t\u1ed5ng th\u1ec3<\/a>, ho\u00e0n to\u00e0n b\u1ecf qua l\u1edbp b\u1ec1 m\u1eb7t m\u1ecfng, gi\u00f2n, nh\u01b0 gi\u1ea5y b\u1eaft \u0111\u1ea7u g\u00e2y ra v\u1ee1 n\u1ee9t. Sai l\u1ea7m \u0111\u1eaft \u0111\u1ecf n\u00e0y kh\u00f4ng ph\u1ea3i do ph\u01b0\u01a1ng ph\u00e1p th\u1eed sai, m\u00e0 l\u00e0 do hi\u1ec3u bi\u1ebft ch\u01b0a \u0111\u00fang c\u00e1ch s\u1eed d\u1ee5ng n\u00f3.<\/p>\n<p>\u0110\u1ed9 c\u1ee9ng kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t con s\u1ed1 tr\u00ean gi\u1ea5y ch\u1ee9ng nh\u1eadn. N\u00f3 l\u00e0 m\u1ed9t ph\u00e9p \u0111o quan tr\u1ecdng cho th\u1ea5y v\u1eadt li\u1ec7u s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c c\u01a1 h\u1ecdc. N\u00f3 li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n, \u0111\u1ed9 d\u1ec5 gia c\u00f4ng, \u0111\u1ed9 dai v\u00e0 s\u1ee9c k\u00e9o. Hi\u1ec3u c\u00e1c nguy\u00ean l\u00fd \u0111\u1eb1ng sau ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng do \u0111\u00f3 l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho b\u1ea5t k\u1ef3 k\u1ef9 s\u01b0 ho\u1eb7c k\u1ef9 thu\u1eadt vi\u00ean n\u00e0o ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-alloy-steel-screws-raw-material-selection-for-maximum-strength\/\"  data-wpil-monitor-id=\"486\" target=\"_blank\">l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/a>, ki\u1ec3m so\u00e1t quy tr\u00ecnh ho\u1eb7c ph\u00e2n t\u00edch h\u1ecfng h\u00f3c. \u0110\u00f3 l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ec9 \u0111\u01a1n gi\u1ea3n thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt th\u00f4ng minh.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y ph\u00e2n t\u00edch c\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng ch\u00ednh: Brinell, Rockwell, Vickers v\u00e0 Knoop. M\u1ee5c ti\u00eau c\u1ee7a ch\u00fang t\u00f4i l\u00e0 v\u01b0\u1ee3t ra ngo\u00e0i c\u00e1c \u0111\u1ecbnh ngh\u0129a c\u01a1 b\u1ea3n v\u00e0 cung c\u1ea5p cho b\u1ea1n ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u1ef1a ch\u1ecdn v\u00e0 di\u1ec5n gi\u1ea3i c\u00e1c ph\u00e9p th\u1eed quan tr\u1ecdng n\u00e0y m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. Ch\u00fang t\u00f4i s\u1ebd kh\u00e1m ph\u00e1 v\u1eadt l\u00fd c\u1ee7a bi\u1ebfn d\u1ea1ng d\u1ebbo, c\u00e1ch m\u1ed7i ph\u01b0\u01a1ng ph\u00e1p ho\u1ea1t \u0111\u1ed9ng, v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 tinh t\u1ebf c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 sai, \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn \u0111\u00fang c\u00f4ng c\u1ee5 cho c\u00f4ng vi\u1ec7c v\u00e0 tin t\u01b0\u1edfng v\u00e0o con s\u1ed1 n\u00f3 cung c\u1ea5p.<\/p>\n<h2>V\u1eadt l\u00fd c\u01a1 b\u1ea3n c\u1ee7a \u0111\u1ed9 c\u1ee9ng<\/h2>\n<p>\u0110\u1ec3 di\u1ec5n gi\u1ea3i ch\u00ednh x\u00e1c b\u1ea5t k\u1ef3 gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng n\u00e0o, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta ph\u1ea3i hi\u1ec3u v\u1ec1 khoa h\u1ecdc v\u1eadt li\u1ec7u li\u00ean quan. S\u1ed1 \u0111o do m\u00e1y \u0111o \u0111\u1ed9 c\u1ee9ng t\u1ea1o ra l\u00e0 k\u1ebft qu\u1ea3 tr\u1ef1c ti\u1ebfp c\u1ee7a <a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-torque-testing-from-basic-physics-to-professional-methods\/\"  data-wpil-monitor-id=\"487\" target=\"_blank\">nguy\u00ean l\u00fd v\u1eadt l\u00fd c\u01a1 b\u1ea3n<\/a> quy \u0111\u1ecbnh c\u00e1ch v\u1eadt li\u1ec7u ph\u1ea3n \u1ee9ng v\u1edbi l\u1ef1c t\u1eadp trung.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-2608\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5231803.jpg\" alt=\"c\u00f4ng vi\u1ec7c, h\u00e0n, th\u1ee3 h\u00e0n, l\u1eeda, luy\u1ec7n kim, kim lo\u1ea1i, tia l\u1eeda, t\u00f2a \u00e1n, \u0111\u1ed9 c\u1ee9ng, h\u00e0n, h\u00e0n, h\u00e0n, h\u00e0n, h\u00e0n, th\u1ee3 h\u00e0n, th\u1ee3 h\u00e0n, th\u1ee3 h\u00e0n, luy\u1ec7n kim, luy\u1ec7n kim, luy\u1ec7n kim\" width=\"800\" height=\"1200\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5231803.jpg 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5231803-200x300.jpg 200w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5231803-768x1152.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-5231803-8x12.jpg 8w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3>\u0110\u1ecbnh ngh\u0129a \u0110\u1ed9 c\u1ee9ng: Ch\u1ed1ng l\u1ea1i Bi\u1ebfn d\u1ea1ng<\/h3>\n<p>\u1ede c\u1ed1t l\u00f5i, \u0111\u1ed9 c\u1ee9ng l\u00e0 th\u01b0\u1edbc \u0111o kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i bi\u1ebfn d\u1ea1ng v\u0129nh vi\u1ec5n c\u1ee5c b\u1ed9 c\u1ee7a v\u1eadt li\u1ec7u. Khi m\u1ed9t \u0111\u1ea7u \u0111o \u0111\u1ed9 c\u1ee9ng nh\u1ea5n v\u00e0o v\u1eadt li\u1ec7u, n\u00f3 tr\u1ea3i qua hai lo\u1ea1i bi\u1ebfn d\u1ea1ng. \u0110\u1ea7u ti\u00ean l\u00e0 bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i, t\u1ea1m th\u1eddi; v\u1eadt li\u1ec7u tr\u1edf l\u1ea1i h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u sau khi t\u1ea3i tr\u1ecdng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf, gi\u1ed1ng nh\u01b0 nh\u1ea5n ng\u00f3n tay v\u00e0o qu\u1ea3 b\u00f3ng cao su. Th\u1ee9 hai l\u00e0 bi\u1ebfn d\u1ea1ng d\u1ebbo, v\u0129nh vi\u1ec5n; v\u1eadt li\u1ec7u b\u1ecb d\u1ecbch chuy\u1ec3n v\u0129nh vi\u1ec5n, t\u1ea1o th\u00e0nh v\u1ebft l\u00f5m. Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng g\u1ea7n nh\u01b0 ch\u1ec9 t\u1eadp trung v\u00e0o vi\u1ec7c \u0111o kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i s\u1ef1 thay \u0111\u1ed5i v\u0129nh vi\u1ec5n n\u00e0y.<\/p>\n<p>T\u1eeb g\u00f3c \u0111\u1ed9 c\u1ea5u tr\u00fac, kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i n\u00e0y \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1edfi c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a v\u1eadt li\u1ec7u. \u0110\u1ed1i v\u1edbi kim lo\u1ea1i, \u0111i\u1ec1u n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c ng\u0103n ch\u1eb7n s\u1ef1 di chuy\u1ec3n c\u1ee7a c\u00e1c khuy\u1ebft t\u1eadt m\u1ea1ng tinh th\u1ec3 g\u1ecdi l\u00e0 dislocations. C\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn, s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c pha c\u1ee9ng ph\u1ee5 (nh\u01b0 carbide trong th\u00e9p), v\u00e0 \u00e1p l\u1ef1c n\u1ed9i b\u1ed9 t\u1ea1o ra b\u1edfi c\u00e1c qu\u00e1 tr\u00ecnh nh\u01b0 gia c\u00f4ng ngu\u1ed9i \u0111\u1ec1u gi\u00fap \u201ck\u1eb9p ch\u1eb7t\u201d c\u00e1c dislocations n\u00e0y, l\u00e0m cho ch\u00fang kh\u00f3 di chuy\u1ec3n h\u01a1n. K\u1ebft qu\u1ea3 l\u00e0, c\u1ea7n nhi\u1ec1u l\u1ef1c h\u01a1n \u0111\u1ec3 t\u1ea1o ra m\u1ed9t v\u1ebft l\u00f5m v\u0129nh vi\u1ec5n, v\u00e0 v\u1eadt li\u1ec7u ghi nh\u1eadn gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng cao h\u01a1n. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng b\u1eb1ng c\u00f4ng vi\u1ec7c \u2014 qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng v\u1eadt li\u1ec7u qua bi\u1ebfn d\u1ea1ng d\u1ebbo \u2014 l\u1ea1i l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng.<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh trong \u0111o l\u01b0\u1eddng<\/h3>\n<p>Gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng cu\u1ed1i c\u00f9ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh thu\u1ea7n t\u00fay, m\u00e0 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 t\u01b0\u01a1ng t\u00e1c ph\u1ee9c t\u1ea1p gi\u1eefa v\u1eadt li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m. B\u1ed1n y\u1ebfu t\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh k\u1ebft qu\u1ea3 c\u1ee7a b\u1ea5t k\u1ef3 ph\u00e9p \u0111o \u0111\u1ed9 c\u1ee9ng n\u00e0o:<\/p>\n<ul>\n<li>Thu\u1ed9c t\u00ednh v\u1eadt li\u1ec7u: \u0110\u1ed9 d\u1ebbo v\u1ed1n c\u00f3, m\u00f4\u0111un \u0111\u00e0n h\u1ed3i, v\u00e0 t\u1ed1c \u0111\u1ed9 l\u00e0m c\u1ee9ng b\u1eb1ng c\u00f4ng vi\u1ec7c c\u1ee7a v\u1eadt li\u1ec7u \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch n\u00f3 ph\u1ea3n \u1ee9ng d\u01b0\u1edbi \u0111\u1ea7u \u0111o. M\u1ed9t v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 d\u1ebbo cao c\u00f3 th\u1ec3 \u201cx\u1ebfp ch\u1ed3ng\u201d quanh v\u1ebft l\u00f5m, trong khi v\u1eadt li\u1ec7u \u00edt d\u1ebbo h\u01a1n c\u00f3 th\u1ec3 \u201cch\u00ecm v\u00e0o\u201d.<\/li>\n<li>H\u00ecnh d\u1ea1ng \u0111\u1ea7u \u0111o: H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u \u0111o \u2014 c\u00f3 th\u1ec3 l\u00e0 h\u00ecnh c\u1ea7u, h\u00ecnh n\u00f3n s\u1eafc ho\u1eb7c h\u00ecnh kim t\u1ef1 th\u00e1p \u2014 x\u00e1c \u0111\u1ecbnh tr\u01b0\u1eddng \u1ee9ng su\u1ea5t m\u00e0 n\u00f3 t\u1ea1o ra trong v\u1eadt li\u1ec7u. \u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh h\u1ecdc n\u00e0y l\u00e0 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed ch\u00ednh.<\/li>\n<li>T\u1ea3i tr\u1ecdng \u00e1p d\u1ee5ng: \u0110\u1ed9 l\u1edbn c\u1ee7a l\u1ef1c t\u00e1c d\u1ee5ng b\u1edfi \u0111\u1ea7u th\u1eed l\u00e0 m\u1ed9t bi\u1ebfn s\u1ed1 quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i ki\u1ec3m tra, gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea3i tr\u1ecdng, trong khi \u0111\u1ed1i v\u1edbi c\u00e1c b\u00e0i ki\u1ec3m tra kh\u00e1c, n\u00f3 v\u1ec1 l\u00fd thuy\u1ebft l\u00e0 \u0111\u1ed9c l\u1eadp.<\/li>\n<li>Th\u1eddi gian ch\u1ecbu t\u1ea3i (Th\u1eddi gian gi\u1eef): \u0110\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 polymer v\u00e0 kim lo\u1ea1i m\u1ec1m \u1edf nhi\u1ec7t \u0111\u1ed9 cao, bi\u1ebfn d\u1ea1ng ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, g\u1ecdi l\u00e0 ch\u1ea3y x\u1ec7, c\u00f3 ngh\u0129a l\u00e0 th\u1eddi gian \u00e1p d\u1ee5ng t\u1ea3i tr\u1ecdng \u0111\u1ea7y \u0111\u1ee7 (th\u1eddi gian gi\u1eef) ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 l\u1eb7p l\u1ea1i \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n<h2>Ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt c\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng v\u0129 m\u00f4<\/h2>\n<p>C\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng macro l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 ch\u1ee7 l\u1ef1c c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p, \u0111\u1eb7c tr\u01b0ng b\u1edfi t\u1ea3i tr\u1ecdng ki\u1ec3m tra cao h\u01a1n (th\u01b0\u1eddng tr\u00ean 1 kgf) v\u00e0 c\u00e1c v\u1ebft l\u00f5m l\u1edbn h\u01a1n. Ch\u00fang r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 c\u1ee9ng t\u1ed5ng th\u1ec3 c\u1ee7a v\u1eadt li\u1ec7u, hi\u1ec7u qu\u1ea3 trong vi\u1ec7c trung b\u00ecnh c\u00e1c kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t nh\u1ecf trong c\u1ea5u tr\u00fac vi m\u00f4. Ch\u00fang ta s\u1ebd xem x\u00e9t ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh: Brinell, Rockwell v\u00e0 Vickers.<\/p>\n<h3>Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng Brinell (ASTM E10)<\/h3>\n<p>Th\u1eed nghi\u1ec7m Brinell l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n l\u00e2u \u0111\u1eddi nh\u1ea5t, nh\u01b0ng v\u1eabn c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. Nguy\u00ean l\u00fd c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean vi\u1ec7c \u00e9p m\u1ed9t \u0111\u1ea7u th\u1eed h\u00ecnh c\u1ea7u c\u1ee9ng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh c\u1ed1 \u0111\u1ecbnh v\u00e0o b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u v\u1edbi m\u1ed9t t\u1ea3i tr\u1ecdng nh\u1ea5t \u0111\u1ecbnh v\u00e0 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian x\u00e1c \u0111\u1ecbnh.<\/p>\n<p>Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i l\u00e0 t\u00ednh to\u00e1n \u00e1p l\u1ef1c trung b\u00ecnh tr\u00ean di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a v\u1ebft l\u00f5m. Sau khi l\u1ef1c \u0111\u01b0\u1ee3c th\u00e1o ra, hai \u0111\u01b0\u1eddng k\u00ednh vu\u00f4ng g\u00f3c c\u1ee7a v\u1ebft l\u00f5m h\u00ecnh tr\u00f2n \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p quang h\u1ecdc, v\u00e0 \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh (d) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Ch\u1ec9 s\u1ed1 \u0111\u1ed9 c\u1ee9ng Brinell (HBW) \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng l\u1ef1c t\u00e1c d\u1ee5ng (F) chia cho di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a v\u1ebft l\u00f5m. C\u00f4ng th\u1ee9c l\u00e0:<\/p>\n<p>HBW = 2F \/ (\u03c0D * (D \u2013 \u221a(D\u00b2 \u2013 d\u00b2)))<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>F = T\u1ea3i tr\u1ecdng \u00e1p d\u1ee5ng (kgf)<\/li>\n<li>D = \u0110\u01b0\u1eddng k\u00ednh c\u1ee7a qu\u1ea3 b\u00f3ng ch\u1ea5m (t\u00ednh b\u1eb1ng mm)<\/li>\n<li>d = \u0110\u01b0\u1eddng k\u00ednh trung b\u00ecnh c\u1ee7a v\u1ebft l\u00f5m (t\u00ednh b\u1eb1ng mm)<\/li>\n<\/ul>\n<p>M\u1ed9t y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng l\u00e0 l\u1ef1a ch\u1ecdn t\u1ef7 l\u1ec7 t\u1ea3i tr\u1ecdng tr\u00ean \u0111\u01b0\u1eddng k\u00ednh. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 so s\u00e1nh \u0111\u01b0\u1ee3c gi\u1eefa c\u00e1c b\u00e0i ki\u1ec3m tra kh\u00e1c nhau, ti\u00eau chu\u1ea9n ASTM E10 y\u00eau c\u1ea7u t\u1ef7 l\u1ec7 F\/D\u00b2 c\u1ed1 \u0111\u1ecbnh t\u00f9y thu\u1ed9c v\u00e0o ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u1eadt li\u1ec7u (v\u00ed d\u1ee5, 30 cho th\u00e9p, 10 cho h\u1ee3p kim \u0111\u1ed3ng, 5 cho h\u1ee3p kim nh\u00f4m). \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o m\u1ee9c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng c\u00f3 h\u00ecnh d\u1ea1ng t\u01b0\u01a1ng t\u1ef1 nhau. H\u1ea1n ch\u1ebf ch\u00ednh c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p th\u1eed Brinell l\u00e0 kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c v\u1eadt li\u1ec7u r\u1ea5t c\u1ee9ng, n\u01a1i vi\u00ean bi tungsten carbide c\u00f3 th\u1ec3 b\u1ecb bi\u1ebfn d\u1ea1ng. N\u00f3 c\u0169ng kh\u00f4ng th\u1ef1c t\u1ebf cho c\u00e1c m\u1eabu m\u1ecfng do v\u1ebft l\u00f5m l\u1edbn v\u00e0 s\u00e2u. \u0110i\u1ec3m m\u1ea1nh c\u1ee7a n\u00f3 n\u1eb1m \u1edf vi\u1ec7c th\u1eed c\u00e1c v\u1eadt li\u1ec7u l\u1edbn, kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u v\u1ec1 c\u1ea5u tr\u00fac nh\u01b0 \u0111\u00fac v\u00e0 r\u00e8n, n\u01a1i v\u1ebft l\u00f5m l\u1edbn cung c\u1ea5p gi\u00e1 tr\u1ecb trung b\u00ecnh r\u1ea5t t\u1ed1t.<\/p>\n<h3>Ki\u1ec3m tra Rockwell (ASTM E18)<\/h3>\n<p>Ki\u1ec3m tra Rockwell c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t trong ng\u00e0nh c\u00f4ng nghi\u1ec7p, ch\u1ee7 y\u1ebfu v\u00ec t\u1ed1c \u0111\u1ed9, s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 k\u1ebft qu\u1ea3 \u0111\u1ecdc tr\u1ef1c ti\u1ebfp, gi\u00fap lo\u1ea1i b\u1ecf nhu c\u1ea7u \u0111o quang h\u1ecdc. S\u1ef1 xu\u1ea5t s\u1eafc v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3 n\u1eb1m \u1edf nguy\u00ean l\u00fd \u0111\u1ed9 s\u00e2u kh\u00e1c bi\u1ec7t.<\/p>\n<p>Qu\u00e1 tr\u00ecnh ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng theo tr\u00ecnh t\u1ef1 ba b\u01b0\u1edbc:<\/p>\n<ol>\n<li>M\u1ed9t t\u1ea3i nh\u1eb9, ho\u1eb7c t\u1ea3i tr\u01b0\u1edbc (th\u01b0\u1eddng l\u00e0 10 kgf), \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. L\u1ef1c ban \u0111\u1ea7u n\u00e0y l\u00e0m cho \u0111\u1ea7u \u0111o ng\u1ed3i v\u1eefng, xuy\u00ean qua b\u1ea5t k\u1ef3 l\u1edbp ph\u1ee7 b\u1ec1 m\u1eb7t ho\u1eb7c nh\u1eefng khuy\u1ebft \u0111i\u1ec3m nh\u1ecf n\u00e0o, v\u00e0 thi\u1ebft l\u1eadp \u0111i\u1ec3m tham chi\u1ebfu \u0111\u1ed9 s\u00e2u b\u1eb1ng kh\u00f4ng. \u0110\u00e2y l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf quan tr\u1ecdng so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c.<\/li>\n<li>T\u1ea3i tr\u1ecdng ch\u00ednh sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian gi\u1eef c\u1ed1 \u0111\u1ecbnh, bu\u1ed9c \u0111\u1ea7u nh\u1ecdn \u0111i s\u00e2u h\u01a1n v\u00e0o v\u1eadt li\u1ec7u. T\u1ed5ng t\u1ea3i tr\u1ecdng l\u00e0 t\u1ed5ng c\u1ee7a t\u1ea3i tr\u1ecdng nh\u1ecf v\u00e0 t\u1ea3i tr\u1ecdng ch\u00ednh.<\/li>\n<li>T\u1ea3i tr\u1ecdng ch\u00ednh \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf, nh\u01b0ng t\u1ea3i tr\u1ecdng nh\u1ecf v\u1eabn \u0111\u01b0\u1ee3c duy tr\u00ec. S\u1ef1 t\u0103ng chi\u1ec1u s\u00e2u th\u00e2m nh\u1eadp t\u1eeb \u0111i\u1ec3m tham chi\u1ebfu ban \u0111\u1ea7u \u0111\u1ebfn \u0111\u1ed9 s\u00e2u cu\u1ed1i c\u00f9ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng nh\u1ecf \u0111\u01b0\u1ee3c \u0111o.<\/li>\n<\/ol>\n<p>Chi\u1ec1u s\u00e2u \u0111o \u0111\u01b0\u1ee3c, h, sau \u0111\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh s\u1ed1 \u0111\u1ed9 c\u1ee9ng. Thang \u0111o Rockwell \u0111\u01b0\u1ee3c \u0111\u1ea3o ng\u01b0\u1ee3c; m\u1ed9t v\u1ebft l\u00f5m n\u00f4ng h\u01a1n s\u1ebd cho ra s\u1ed1 \u0111\u1ed9 c\u1ee9ng cao h\u01a1n. Ph\u00e9p \u0111o chi\u1ec1u s\u00e2u ch\u00eanh l\u1ec7ch n\u00e0y t\u1ef1 nhi\u00ean b\u00f9 \u0111\u1eafp cho m\u1ed9t ph\u1ea7n c\u1ee7a <a href=\"https:\/\/productionscrews.com\/vi\/the-science-behind-elastic-material-from-bridges-to-medical-breakthroughs\/\"  data-wpil-monitor-id=\"489\" target=\"_blank\">v\u00f9ng \u0111\u00e0n h\u1ed3i<\/a> ph\u1ee5c h\u1ed3i, m\u1ed9t ngu\u1ed3n l\u1ed7i \u0111\u00e1ng k\u1ec3 trong c\u00e1c b\u00e0i ki\u1ec3m tra kh\u00e1c. N\u00f3 \u0111o \u0111\u1ed9 s\u00e2u nh\u1ef1a v\u0129nh vi\u1ec5n, gi\u00fap \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng nh\u1ef1a m\u1ed9t c\u00e1ch tr\u1ef1c ti\u1ebfp h\u01a1n.<\/p>\n<p>T\u00ednh linh ho\u1ea1t c\u1ee7a th\u1eed nghi\u1ec7m Rockwell \u0111\u1ebfn t\u1eeb c\u00e1c thang \u0111o \u0111a d\u1ea1ng c\u1ee7a n\u00f3. M\u1ed7i thang \u0111o s\u1eed d\u1ee5ng m\u1ed9t t\u1ed5 h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a \u0111\u1ea7u nh\u1ea5n v\u00e0 t\u1ea3i tr\u1ecdng ch\u00ednh. V\u00ed d\u1ee5, thang \u0111o Rockwell C (HRC) s\u1eed d\u1ee5ng m\u1ed9t h\u00ecnh n\u00f3n kim c\u01b0\u01a1ng 120\u00b0 (\u0111\u1ea7u nh\u1ea5n Brale) v\u00e0 t\u1ed5ng t\u1ea3i tr\u1ecdng 150 kgf, ph\u00f9 h\u1ee3p cho th\u00e9p c\u1ee9ng. Thang \u0111o Rockwell B (HRB) s\u1eed d\u1ee5ng m\u1ed9t vi\u00ean bi th\u00e9p ho\u1eb7c h\u1ee3p kim carbide tungsten \u0111\u01b0\u1eddng k\u00ednh 1\/16 inch v\u00e0 t\u1ed5ng t\u1ea3i tr\u1ecdng 100 kgf, ph\u00f9 h\u1ee3p cho kim lo\u1ea1i m\u1ec1m h\u01a1n nh\u01b0 nh\u00f4m v\u00e0 \u0111\u1ed3ng thau.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2607\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto.jpg\" alt=\"ng\u01b0\u1eddi \u0111\u00e0n \u00f4ng m\u1eb7c \u00e1o kho\u00e1c \u0111en v\u00e0 \u0111\u1ed9i m\u0169 b\u1ea3o hi\u1ec3m \u0111\u1ecf \u0111ang ng\u1ed3i tr\u00ean gh\u1ebf g\u1ed7 n\u00e2u\" width=\"1598\" height=\"1200\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto.jpg 1598w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto-300x225.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto-768x577.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto-1536x1153.jpg 1536w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-wTu1hf79rto-16x12.jpg 16w\" sizes=\"(max-width: 1598px) 100vw, 1598px\" \/><\/p>\n<h3>Th\u1eed nghi\u1ec7m Vickers (ASTM E384\/E92)<\/h3>\n<p>Th\u1eed nghi\u1ec7m Vickers thu h\u1eb9p kho\u1ea3ng c\u00e1ch gi\u1eefa ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng macro v\u00e0 micro. N\u00f3 s\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ea7u nh\u1ea5n duy nh\u1ea5t cho t\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u: m\u1ed9t kim c\u01b0\u01a1ng h\u00ecnh kim t\u1ef1 th\u00e1p c\u00f3 \u0111\u00e1y vu\u00f4ng v\u1edbi g\u00f3c 136\u00b0 gi\u1eefa c\u00e1c m\u1eb7t \u0111\u1ed1i di\u1ec7n.<\/p>\n<p>\u01afu \u0111i\u1ec3m k\u1ef9 thu\u1eadt ch\u00ednh c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p Vickers l\u00e0 \u0111\u1ed9c l\u1eadp v\u1edbi t\u1ea3i tr\u1ecdng. V\u00ec \u0111\u1ea7u nh\u1ea5n h\u00ecnh kim t\u1ef1 th\u00e1p c\u00f3 h\u00ecnh d\u1ea1ng t\u01b0\u01a1ng t\u1ef1 v\u1ec1 m\u1eb7t h\u00ecnh h\u1ecdc b\u1ea5t k\u1ec3 \u0111\u1ed9 s\u00e2u th\u00e2m nh\u1eadp, gi\u00e1 tr\u1ecb \u0110\u1ed9 c\u1ee9ng Vickers (HV) v\u1ec1 l\u00fd thuy\u1ebft l\u00e0 kh\u00f4ng \u0111\u1ed5i \u0111\u1ed1i v\u1edbi m\u1ed9t v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh b\u1ea5t k\u1ec3 l\u1ef1c th\u1eed nghi\u1ec7m s\u1eed d\u1ee5ng. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t thang \u0111o c\u1ef1c k\u1ef3 linh ho\u1ea1t v\u00e0 nh\u1ea5t qu\u00e1n, cho ph\u00e9p so s\u00e1nh tr\u1ef1c ti\u1ebfp c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng \u0111o \u0111\u01b0\u1ee3c v\u1edbi c\u00e1c t\u1ea3i tr\u1ecdng kh\u00e1c nhau.<\/p>\n<p>Gi\u1ed1ng nh\u01b0 th\u1eed nghi\u1ec7m Brinell, ph\u01b0\u01a1ng ph\u00e1p Vickers l\u00e0 ph\u01b0\u01a1ng ph\u00e1p quang h\u1ecdc. Sau khi lo\u1ea1i b\u1ecf t\u1ea3i tr\u1ecdng, hai \u0111\u01b0\u1eddng ch\u00e9o (d1 v\u00e0 d2) c\u1ee7a v\u1ebft l\u00f5m h\u00ecnh vu\u00f4ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng k\u00ednh hi\u1ec3n vi ph\u00f3ng \u0111\u1ea1i cao. \u0110\u1ed9 d\u00e0i trung b\u00ecnh c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o sau \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00f4ng th\u1ee9c:<\/p>\n<p>HV \u2248 1.854 * (F \/ d\u00b2)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>F = T\u1ea3i tr\u1ecdng \u00e1p d\u1ee5ng (kgf)<\/li>\n<li>d = \u0110\u1ed9 d\u00e0i trung b\u00ecnh c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o (t\u00ednh b\u1eb1ng mm)<\/li>\n<\/ul>\n<p>Th\u1eed nghi\u1ec7m Vickers c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean m\u1ed9t ph\u1ea1m vi v\u1eadt li\u1ec7u c\u1ef1c k\u1ef3 r\u1ed9ng, t\u1eeb ch\u00ec m\u1ec1m \u0111\u1ebfn g\u1ed1m si\u00eau c\u1ee9ng. \u1ee8ng d\u1ee5ng ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 trong nghi\u00ean c\u1ee9u, ph\u00e2n t\u00edch h\u00e0n v\u00e0 ki\u1ec3m tra c\u00e1c v\u1eadt li\u1ec7u m\u1ecfng ho\u1eb7c c\u00e1c khu v\u1ef1c nh\u1ecf m\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c s\u1ebd g\u00e2y h\u01b0 h\u1ecfng qu\u00e1 m\u1ee9c ho\u1eb7c kh\u00f4ng ch\u00ednh x\u00e1c. Nh\u01b0\u1ee3c \u0111i\u1ec3m ch\u00ednh l\u00e0 c\u1ea7n chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t t\u1ed1t v\u00e0 k\u1ef9 n\u0103ng v\u1eadn h\u00e0nh cao \u0111\u1ec3 \u0111o ch\u00ednh x\u00e1c c\u00e1c v\u1ebft l\u00f5m nh\u1ecf.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"144\">\u0110\u1eb7c \u0111i\u1ec3m<\/td>\n<td width=\"144\">Brinell (HBW)<\/td>\n<td width=\"144\">Rockwell (HR)<\/td>\n<td width=\"144\">Vickers (HV)<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Nguy\u00ean t\u1eafc<\/strong><\/td>\n<td width=\"144\">\u00c1p l\u1ef1c trung b\u00ecnh tr\u00ean di\u1ec7n t\u00edch v\u1ebft l\u00f5m<\/td>\n<td width=\"144\">\u0110\u1ed9 s\u00e2u th\u00e2m nh\u1eadp kh\u00e1c bi\u1ec7t<\/td>\n<td width=\"144\">Kh\u00e1ng l\u1ea1i \u0111\u1ea7u nh\u1ea5n h\u00ecnh kim t\u1ef1 th\u00e1p<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u0110\u1ea7u nh\u1ea5n<\/strong><\/td>\n<td width=\"144\">Vi\u00ean bi h\u1ee3p kim carbide tungsten (1-10 mm)<\/td>\n<td width=\"144\">H\u00ecnh n\u00f3n kim c\u01b0\u01a1ng (120\u00b0) ho\u1eb7c vi\u00ean bi th\u00e9p\/WC<\/td>\n<td width=\"144\">Kim t\u1ef1 th\u00e1p kim c\u01b0\u01a1ng (136\u00b0)<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u0110o l\u01b0\u1eddng<\/strong><\/td>\n<td width=\"144\">Quang h\u1ecdc (\u0110\u01b0\u1eddng k\u00ednh v\u1ebft l\u00f5m)<\/td>\n<td width=\"144\">C\u01a1 h\u1ecdc (\u0110\u1ed9 s\u00e2u th\u00e2m nh\u1eadp)<\/td>\n<td width=\"144\">Quang h\u1ecdc (\u0110\u01b0\u1eddng ch\u00e9o c\u1ee7a v\u1ebft l\u00f5m)<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u01afu \u0111i\u1ec3m ch\u00ednh<\/strong><\/td>\n<td width=\"144\">T\u1ed1t cho \u0111\u1ed9 c\u1ee9ng kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn, v\u1eadt li\u1ec7u kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u<\/td>\n<td width=\"144\">\u0110\u1ecdc nhanh, tr\u1ef1c ti\u1ebfp, \u00edt nh\u1ea1y c\u1ea3m v\u1edbi ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t<\/td>\n<td width=\"144\">Kh\u00f4ng ph\u1ee5 thu\u1ed9c t\u1ea3i tr\u1ecdng, thang \u0111o duy nh\u1ea5t cho t\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>S\u1eed d\u1ee5ng ch\u00ednh<\/strong><\/td>\n<td width=\"144\">\u0110\u00fac, r\u00e8n, c\u00e1c th\u00e0nh ph\u1ea7n l\u1edbn<\/td>\n<td width=\"144\">Th\u00e9p nhi\u1ec7t luy\u1ec7n, ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t<\/td>\n<td width=\"144\">T\u1ea5t c\u1ea3 kim lo\u1ea1i, nghi\u00ean c\u1ee9u, ki\u1ec3m tra h\u00e0n<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh<\/strong><\/td>\n<td width=\"144\">ASTM E10 \/ ISO 6506<\/td>\n<td width=\"144\">ASTM E18 \/ ISO 6508<\/td>\n<td width=\"144\">ASTM E384\/E92 \/ ISO 6507<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ph\u00e2n t\u00edch so s\u00e1nh: C\u01a1 h\u1ecdc c\u1ee7a v\u1ebft l\u00f5m<\/h2>\n<p>Hi\u1ec3u c\u00e1ch m\u1ed7i ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng ri\u00eang l\u1ebb l\u00e0 n\u1ec1n t\u1ea3ng. Tuy nhi\u00ean, s\u1ef1 th\u00e0nh th\u1ea1o th\u1ef1c s\u1ef1 \u0111\u1ebfn t\u1eeb vi\u1ec7c so s\u00e1nh c\u01a1 h\u1ecdc n\u1ec1n t\u1ea3ng c\u1ee7a ch\u00fang v\u00e0 hi\u1ec3u c\u00e1ch nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 bi\u1ebfn \u0111\u1ed5i trong k\u1ebft qu\u1ea3 v\u00e0 kh\u1ea3 n\u0103ng m\u1eafc l\u1ed7i.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-280806.jpg\" height=\"850\" width=\"1280\" class=\"alignnone size-full wp-image-2606\" alt=\"Thi\u1ebft b\u1ecb ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u v\u00e0 ng\u0103n ng\u1eeba c\u00e1c h\u1ecfng h\u00f3c t\u1ed1n k\u00e9m trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-280806.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-280806-300x199.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-280806-768x510.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/pixabay-280806-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h3>H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u \u0111o v\u00e0 \u1ee9ng su\u1ea5t<\/h3>\n<p>H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u \u0111o quy\u1ebft \u0111\u1ecbnh tr\u01b0\u1eddng \u1ee9ng su\u1ea5t m\u00e0 n\u00f3 t\u1ea1o ra trong v\u1eadt li\u1ec7u, t\u1eeb \u0111\u00f3 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<ul>\n<li>H\u00ecnh c\u1ea7u (Brinell): Tr\u01b0\u1eddng \u1ee9ng su\u1ea5t d\u01b0\u1edbi h\u00ecnh c\u1ea7u r\u1ea5t ph\u1ee9c t\u1ea1p. Khi vi\u00ean bi th\u00e2m nh\u1eadp s\u00e2u h\u01a1n, di\u1ec7n t\u00edch ti\u1ebfp x\u00fac t\u0103ng l\u00ean, v\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a \u1ee9ng su\u1ea5t thay \u0111\u1ed5i. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi h\u1ec7 s\u1ed1 c\u1ee9ng bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u (h\u1ec7 s\u1ed1 n). V\u1eadt li\u1ec7u c\u00f3 h\u1ec7 s\u1ed1 n cao th\u01b0\u1eddng \u201cx\u1ebfp ch\u1ed3ng\u201d quanh v\u1ebft l\u00f5m, l\u00e0m cho \u0111\u01b0\u1eddng k\u00ednh \u0111o \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n \u0111\u01b0\u1eddng k\u00ednh ti\u1ebfp x\u00fac th\u1ef1c s\u1ef1, l\u00e0m t\u0103ng gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng m\u1ed9t c\u00e1ch gi\u1ea3 t\u1ea1o. Ng\u01b0\u1ee3c l\u1ea1i, v\u1eadt li\u1ec7u \u0111\u00e3 qua nhi\u1ec7t luy\u1ec7n c\u00f3 th\u1ec3 \u201cs\u1ee5t v\u00e0o\u201d, d\u1eabn \u0111\u1ebfn \u01b0\u1edbc l\u01b0\u1ee3ng \u0111\u1ed9 c\u1ee9ng th\u1ea5p h\u01a1n.<\/li>\n<li>H\u00ecnh n\u00f3n (Rockwell): \u0110\u1ea7u n\u00f3n kim c\u01b0\u01a1ng 120\u00b0 t\u1ea1o ra tr\u01b0\u1eddng \u1ee9ng su\u1ea5t ch\u1ee9a \u0111\u1ef1ng v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n so v\u1edbi h\u00ecnh c\u1ea7u. M\u1eb7c d\u00f9 v\u1eabn ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng x\u1ebfp ch\u1ed3ng v\u00e0 s\u1ee5t v\u00e0o, ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 s\u00e2u kh\u00e1c bi\u1ec7t \u00edt nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng b\u1ec1 m\u1eb7t n\u00e0y so v\u1edbi \u0111o di\u1ec7n t\u00edch quang h\u1ecdc.<\/li>\n<li>H\u00ecnh ch\u00f3p (Vickers): H\u00ecnh d\u1ea1ng kim t\u1ef1 th\u00e1p s\u1eafc n\u00e9t t\u1ea1o ra tr\u01b0\u1eddng \u1ee9ng su\u1ea5t c\u00f3 h\u00ecnh d\u1ea1ng t\u01b0\u01a1ng t\u1ef1 \u1edf m\u1ecdi \u0111\u1ed9 s\u00e2u. \u0110\u00e2y l\u00e0 l\u00fd do v\u1eadt l\u00fd \u0111\u1eb1ng sau t\u00ednh \u0111\u1ed9c l\u1eadp c\u1ee7a t\u1ea3i tr\u1ecdng c\u1ee7a s\u1ed1 \u0111\u1ed9 c\u1ee9ng Vickers. M\u1ee9c \u0111\u1ed9 t\u1eadp trung \u1ee9ng su\u1ea5t cao t\u1ea1i \u0111\u1ec9nh kim t\u1ef1 th\u00e1p \u0111\u1ea3m b\u1ea3o d\u00f2ng ch\u1ea3y d\u1ebbo b\u1eaft \u0111\u1ea7u g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c, ngay c\u1ea3 trong c\u00e1c v\u1eadt li\u1ec7u r\u1ea5t c\u1ee9ng.<\/li>\n<\/ul>\n<h3>Kinh nghi\u1ec7m th\u1ef1c t\u1ebf: C\u00e1c ngu\u1ed3n l\u1ed7i ph\u1ed5 bi\u1ebfn<\/h3>\n<p>Trong c\u00f4ng vi\u1ec7c ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a ch\u00fang t\u00f4i, ch\u00fang t\u00f4i li\u00ean t\u1ee5c g\u1eb7p ph\u1ea3i m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ed9 c\u1ee9ng. Hi\u1ec3u v\u00e0 gi\u1ea3m thi\u1ec3u nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 ki\u1ec3m tra \u0111\u00e1ng tin c\u1eady.<\/p>\n<ul>\n<li>V\u1ea5n \u0111\u1ec1: Hi\u1ec7u \u1ee9ng \u201cAnvil\u201d \/ M\u1eabu m\u1ecfng: N\u1ebfu m\u1eabu qu\u00e1 m\u1ecfng, v\u00f9ng bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi \u0111\u1ea7u nh\u1ea5n c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u0111\u1ebfn \u0111e h\u1ed7 tr\u1ee3. \u0110\u1ed9 c\u1ee9ng c\u1ee7a \u0111e sau \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e9p \u0111o, th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 cao gi\u1ea3. M\u1ed9t quy t\u1eafc chung, \u0111\u01b0\u1ee3c ghi v\u00e0o c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 ASTM E18, l\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u n\u00ean \u00edt nh\u1ea5t g\u1ea5p 10 l\u1ea7n chi\u1ec1u s\u00e2u c\u1ee7a v\u1ebft nh\u1ea5n.<\/li>\n<li>V\u1ea5n \u0111\u1ec1: Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c v\u1ebft nh\u1ea5n: M\u1ed7i v\u1ebft nh\u1ea5n t\u1ea1o ra m\u1ed9t v\u00f9ng c\u1ee7a v\u1eadt li\u1ec7u d\u1ebbo bi\u1ebfn d\u1ea1ng, \u0111\u00e3 t\u00f4i c\u1ee9ng quanh n\u00f3. N\u1ebfu m\u1ed9t v\u1ebft nh\u1ea5n m\u1edbi \u0111\u01b0\u1ee3c \u0111\u1eb7t qu\u00e1 g\u1ea7n v\u1ebft c\u0169 ho\u1eb7c g\u1ea7n m\u00e9p m\u1eabu, k\u1ebft qu\u1ea3 s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi v\u1eadt li\u1ec7u \u0111\u00e3 ch\u1ecbu t\u1ea3i tr\u01b0\u1edbc \u0111\u00f3. C\u00e1c ti\u00eau chu\u1ea9n y\u00eau c\u1ea7u kho\u1ea3ng c\u00e1ch t\u1ed1i thi\u1ec3u, th\u01b0\u1eddng l\u00e0 3 \u0111\u1ebfn 5 l\u1ea7n \u0111\u01b0\u1eddng k\u00ednh ho\u1eb7c \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a v\u1ebft nh\u1ea5n, \u0111\u1ec3 tr\u00e1nh s\u1ef1 can thi\u1ec7p n\u00e0y.<\/li>\n<li>V\u1ea5n \u0111\u1ec1: Chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t: Nhu c\u1ea7u chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3. Th\u1eed nghi\u1ec7m Rockwell, v\u1edbi l\u1ef1c t\u1ea3i ban \u0111\u1ea7u \u0111\u1ec3 ph\u00e1 v\u1ee1 l\u1edbp s\u01a1n ph\u1ee7, l\u00e0 d\u1ec5 d\u00e0ng nh\u1ea5t v\u00e0 th\u01b0\u1eddng ch\u1ec9 c\u1ea7n m\u1ed9t b\u1ec1 m\u1eb7t s\u1ea1ch, ph\u1eb3ng. Th\u1eed nghi\u1ec7m Brinell c\u1ea7n b\u1ec1 m\u1eb7t \u0111\u1ee7 m\u1ecbn \u0111\u1ec3 \u0111\u1ecdc quang h\u1ecdc ch\u00ednh x\u00e1c c\u1ea1nh v\u1ebft nh\u1ea5n, th\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng m\u00e0i. Th\u1eed nghi\u1ec7m Vickers v\u00e0 Knoop, \u0111\u1eb7c bi\u1ec7t \u1edf t\u1ea3i nh\u1ecf, c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m. Ch\u00fang y\u00eau c\u1ea7u b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng kim lo\u1ea1i h\u1ecdc, nh\u01b0 g\u01b0\u01a1ng, v\u00e0 vu\u00f4ng g\u00f3c ho\u00e0n h\u1ea3o \u0111\u1ec3 \u0111o \u0111\u01b0\u1eddng ch\u00e9o ch\u00ednh x\u00e1c.<\/li>\n<li>V\u1ea5n \u0111\u1ec1: Th\u1eddi gian gi\u1eef (Dwell Time): \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft th\u00e9p \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, th\u1eddi gian gi\u1eef ti\u00eau chu\u1ea9n t\u1eeb 10-15 gi\u00e2y l\u00e0 \u0111\u1ee7. Tuy nhi\u00ean, khi ch\u00fang t\u00f4i <a href=\"https:\/\/productionscrews.com\/vi\/raw-material-testing-a-comprehensive-guide-to-quality-control-methods-2024\/\"  data-wpil-monitor-id=\"488\" target=\"_blank\">ki\u1ec3m tra c\u00e1c v\u1eadt li\u1ec7u<\/a> bi\u1ec3u hi\u1ec7n s\u1ef1 ch\u1ea3y tr\u01b0\u1ee3t, nh\u01b0 polymer ho\u1eb7c kim lo\u1ea1i g\u1ea7n nhi\u1ec7t \u0111\u1ed9 recrystallization c\u1ee7a ch\u00fang, \u0111\u1ea7u nh\u1ea5n s\u1ebd ti\u1ebfp t\u1ee5c x\u00e2m nh\u1eadp mi\u1ec5n l\u00e0 t\u1ea3i v\u1eabn c\u00f2n t\u00e1c d\u1ee5ng. \u0110\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u n\u00e0y, th\u1eddi gian gi\u1eef ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c v\u00e0 ki\u1ec3m so\u00e1t (v\u00ed d\u1ee5, 30 gi\u00e2y ho\u1eb7c l\u00e2u h\u01a1n) \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u00e0 c\u00f3 \u00fd ngh\u0129a.<\/li>\n<\/ul>\n<table>\n<tbody>\n<tr>\n<td width=\"144\">Ngu\u1ed3n l\u1ed7i<\/td>\n<td width=\"144\">Brinell<\/td>\n<td width=\"144\">Rockwell<\/td>\n<td width=\"144\">Vickers\/Knoop<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Ho\u00e0n thi\u1ec7n B\u1ec1 m\u1eb7t<\/strong><\/td>\n<td width=\"144\">Nh\u1ea1y c\u1ea3m trung b\u00ecnh. M\u00e0i m\u00f2n th\u01b0\u1eddng \u0111\u1ee7.<\/td>\n<td width=\"144\">Nh\u1ea1y c\u1ea3m th\u1ea5p do l\u1ef1c t\u1ea3i ban \u0111\u1ea7u.<\/td>\n<td width=\"144\"><strong>Nh\u1ea1y c\u1ea3m cao.<\/strong> Y\u00eau c\u1ea7u \u0111\u00e1nh b\u00f3ng kim lo\u1ea1i h\u1ecdc \u0111\u1ec3 ch\u00ednh x\u00e1c.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Ph\u1ee5c h\u1ed3i \u0111\u00e0n h\u1ed3i<\/strong><\/td>\n<td width=\"144\">\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e9p \u0111o quang h\u1ecdc; c\u00f3 th\u1ec3 l\u00e0 ngu\u1ed3n l\u1ed7i \u0111\u00e1ng k\u1ec3.<\/td>\n<td width=\"144\">\u0110\u01b0\u1ee3c b\u00f9 m\u1ed9t ph\u1ea7n b\u1eb1ng ph\u00e9p \u0111o \u0111\u1ed9 s\u00e2u kh\u00e1c bi\u1ec7t.<\/td>\n<td width=\"144\">C\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ebft l\u00f5m \u201cu\u1ed1n cong\u201d ho\u1eb7c \u201ch\u00ecnh chi\u1ebfc g\u1ed1i\u201d, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e9p \u0111o \u0111\u01b0\u1eddng ch\u00e9o.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u00c1p d\u1ee5ng t\u1ea3i<\/strong><\/td>\n<td width=\"144\">Th\u1ee7 c\u00f4ng ho\u1eb7c th\u1ee7y l\u1ef1c; t\u1ed1c \u0111\u1ed9 c\u00f3 th\u1ec3 l\u00e0 y\u1ebfu t\u1ed1.<\/td>\n<td width=\"144\">Chu k\u1ef3 ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd, t\u1ef1 \u0111\u1ed9ng l\u00e0 ti\u00eau chu\u1ea9n.<\/td>\n<td width=\"144\">R\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi t\u00e1c \u0111\u1ed9ng v\u00e0 rung l\u1eafc, \u0111\u1eb7c bi\u1ec7t \u1edf t\u1ea3i nh\u1ecf.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>K\u1ef9 n\u0103ng v\u1eadn h\u00e0nh<\/strong><\/td>\n<td width=\"144\">Cao. \u0110\u1ecdc \u0111\u01b0\u1eddng k\u00ednh ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi k\u1ef9 n\u0103ng v\u00e0 k\u00ednh hi\u1ec3n vi t\u1ed1t.<\/td>\n<td width=\"144\">Th\u1ea5p. \u0110\u1ecdc tr\u1ef1c ti\u1ebfp gi\u1ea3m thi\u1ec3u ch\u1ee7 quan c\u1ee7a ng\u01b0\u1eddi v\u1eadn h\u00e0nh.<\/td>\n<td width=\"144\">Cao. \u0110o \u0111\u01b0\u1eddng ch\u00e9o nh\u1ecf ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi k\u1ef9 n\u0103ng \u0111\u00e1ng k\u1ec3.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Ch\u1ea5t li\u1ec7u t\u00edch t\u1ee5 \/ ch\u00ecm xu\u1ed1ng<\/strong><\/td>\n<td width=\"144\">C\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 di\u1ec7n t\u00edch ti\u1ebfp x\u00fac th\u1ef1c s\u1ef1, d\u1eabn \u0111\u1ebfn sai s\u1ed1.<\/td>\n<td width=\"144\">\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 s\u00e2u nh\u01b0ng l\u00e0 bi\u1ebfn s\u1ed1 \u0111\u00e3 bi\u1ebft.<\/td>\n<td width=\"144\">\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn \u0111o \u0111\u01b0\u1eddng ch\u00e9o v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a v\u1ebft l\u00f5m.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng vi m\u00f4 &amp; \u1ee8ng d\u1ee5ng chuy\u00ean bi\u1ec7t<\/h2>\n<p>Khi c\u00e1c th\u00e0nh ph\u1ea7n qu\u00e1 nh\u1ecf, qu\u00e1 m\u1ecfng ho\u1eb7c khi c\u1ea7n kh\u1ea3o s\u00e1t c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m vi c\u1ea5u tr\u00fac ri\u00eang l\u1ebb, ch\u00fang ta s\u1eed d\u1ee5ng ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng vi m\u00f4. C\u00e1c ki\u1ec3m tra n\u00e0y s\u1eed d\u1ee5ng t\u1ea3i tr\u1ecdng th\u01b0\u1eddng d\u01b0\u1edbi 1 kgf v\u00e0 t\u1ea1o ra c\u00e1c v\u1ebft l\u00f5m vi m\u00f4, \u0111\u00f2i h\u1ecfi \u0111o l\u01b0\u1eddng ph\u00f3ng \u0111\u1ea1i cao.<\/p>\n<h3>Ki\u1ec3m tra Knoop (ASTM E384)<\/h3>\n<p>Ki\u1ec3m tra Knoop l\u00e0 m\u1ed9t ng\u01b0\u1eddi anh h\u1ecd g\u1ea7n c\u1ee7a ki\u1ec3m tra Vickers nh\u01b0ng s\u1eed d\u1ee5ng m\u1ed9t lo\u1ea1i \u0111\u1ea7u d\u00f2 kh\u00e1c: m\u1ed9t h\u00ecnh ch\u00f3p d\u00e0i, d\u1ef1a tr\u00ean h\u00ecnh thoi. H\u00ecnh d\u1ea1ng n\u00e0y t\u1ea1o ra v\u1ebft l\u00f5m r\u1ea5t d\u00e0i nh\u01b0ng r\u1ea5t n\u00f4ng, v\u1edbi t\u1ef7 l\u1ec7 \u0111\u01b0\u1eddng ch\u00e9o kho\u1ea3ng 7:1.<\/p>\n<p>H\u00ecnh d\u1ea1ng \u0111\u1ed9c \u0111\u00e1o n\u00e0y mang l\u1ea1i l\u1ee3i th\u1ebf r\u00f5 r\u00e0ng cho hai l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng ch\u00ednh:<\/p>\n<ul>\n<li>Ch\u1ea5t li\u1ec7u gi\u00f2n: Khi ki\u1ec3m tra g\u1ed1m s\u1ee9 ho\u1eb7c th\u1ee7y tinh, \u1ee9ng su\u1ea5t cao t\u1ea1i c\u00e1c g\u00f3c c\u1ee7a v\u1ebft l\u00f5m Vickers \u0111\u1ed1i x\u1ee9ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng g\u00e2y n\u1ee9t, l\u00e0m m\u1ea5t hi\u1ec7u l\u1ef1c c\u1ee7a ki\u1ec3m tra. \u0110\u1ea7u d\u00f2 Knoop c\u00f3 kh\u1ea3 n\u0103ng x\u00e2m nh\u1eadp n\u00f4ng h\u01a1n v\u00e0 t\u1eadp trung \u1ee9ng su\u1ea5t th\u1ea5p h\u01a1n d\u1ecdc theo tr\u1ee5c ng\u1eafn c\u1ee7a n\u00f3, gi\u1ea3m \u0111\u00e1ng k\u1ec3 xu h\u01b0\u1edbng n\u1ee9t, l\u00e0m cho ph\u01b0\u01a1ng ph\u00e1p n\u00e0y tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c v\u1eadt li\u1ec7u n\u00e0y.<\/li>\n<li>L\u1edbp ph\u1ee7 m\u1ecfng: \u0110\u1ed9 s\u00e2u n\u00f4ng c\u1ee7a v\u1ebft l\u00f5m Knoop cho ph\u00e9p \u0111o \u0111\u1ed9 c\u1ee9ng c\u1ee7a l\u1edbp b\u1ec1 m\u1eb7t m\u1ecfng (v\u00ed d\u1ee5, l\u1edbp ph\u1ee7 nitride ho\u1eb7c l\u1edbp m\u1ea1) m\u00e0 kh\u00f4ng l\u00e0m v\u1ebft l\u00f5m xuy\u00ean qua l\u1edbp n\u1ec1n. \u0110i\u1ec1u n\u00e0y c\u00f4 l\u1eadp ph\u00e9p \u0111o v\u1edbi l\u1edbp ph\u1ee7, cung c\u1ea5p gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng th\u1ef1c s\u1ef1 kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi v\u1eadt li\u1ec7u m\u1ec1m h\u01a1n b\u00ean d\u01b0\u1edbi.<\/li>\n<\/ul>\n<p>L\u00fd do k\u1ef9 thu\u1eadt khi\u1ebfn \u0111\u1ea7u d\u00f2 Knoop \u00edt c\u00f3 xu h\u01b0\u1edbng g\u00e2y n\u1ee9t h\u01a1n so v\u1edbi Vickers n\u1eb1m \u1edf ph\u00e2n b\u1ed1 \u1ee9ng su\u1ea5t v\u00e0 d\u1ecbch chuy\u1ec3n v\u1eadt li\u1ec7u. H\u00ecnh d\u1ea1ng d\u00e0i c\u1ee7a n\u00f3 \u00edt d\u1ecbch chuy\u1ec3n v\u1eadt li\u1ec7u h\u01a1n tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb chi\u1ec1u s\u00e2u x\u00e2m nh\u1eadp d\u1ecdc theo tr\u1ee5c ng\u1eafn, d\u1eabn \u0111\u1ebfn tr\u01b0\u1eddng \u1ee9ng su\u1ea5t \u00edt nghi\u00eam tr\u1ecdng h\u01a1n t\u1ea1i c\u00e1c g\u00f3c ch\u00e9o quan tr\u1ecdng.<\/p>\n<h3>Nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh: B\u00e1nh r\u0103ng x\u1eed l\u00fd c\u1ee9ng b\u1ec1 m\u1eb7t<\/h3>\n<p>Xem x\u00e9t <a href=\"https:\/\/productionscrews.com\/vi\/5-secrets-of-heat-treatment-process-engineering-metal-properties-revealed\/\"  data-wpil-monitor-id=\"485\" target=\"_blank\">th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt trong vi\u1ec7c x\u00e1c minh qu\u00e1 tr\u00ecnh nhi\u1ec7t luy\u1ec7n<\/a> c\u1ee7a b\u00e1nh r\u0103ng th\u00e9p c\u1ee9ng b\u1ec1 m\u1eb7t. Thi\u1ebft k\u1ebf y\u00eau c\u1ea7u m\u1ed9t b\u1ec1 m\u1eb7t r\u1ea5t c\u1ee9ng, ch\u1ed1ng m\u00e0i m\u00f2n (l\u1edbp v\u1ecf) \u0111\u1ec3 ch\u1ecbu \u0111\u1ef1ng c\u00e1c \u1ee9ng su\u1ea5t ti\u1ebfp x\u00fac, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi m\u1ed9t l\u00f5i m\u1ec1m h\u01a1n, dai h\u01a1n \u0111\u1ec3 ch\u1ed1ng g\u00e3y r\u0103ng.<\/p>\n<ol>\n<li>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed Macro: M\u1ed9t l\u1ea7n th\u1eed Rockwell C tr\u00ean b\u1ec1 m\u1eb7t r\u0103ng b\u00e1nh r\u0103ng c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 cao, v\u00ed d\u1ee5 60 HRC. Tuy nhi\u00ean, n\u1ebfu \u0111\u1ed9 d\u00e0y l\u1edbp v\u1ecf ch\u1ec9 0,5 mm, t\u1ea3i tr\u1ecdng 150 kgf c\u1ee7a th\u1eed HRC s\u1ebd khi\u1ebfn kim c\u01b0\u01a1ng th\u1ea5m s\u00e2u \u0111\u1ee7 \u0111\u1ec3 v\u00f9ng bi\u1ebfn d\u1ea1ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi v\u1eadt li\u1ec7u l\u00f5i m\u1ec1m h\u01a1n. K\u1ebft qu\u1ea3 l\u00e0 trung b\u00ecnh c\u1ee7a l\u1edbp v\u1ecf v\u00e0 l\u00f5i, kh\u00f4ng ph\u1ea3n \u00e1nh ch\u00ednh x\u00e1c b\u1ec1 m\u1eb7t, v\u00e0 c\u00f3 th\u1ec3 che khu\u1ea5t l\u1edbp v\u1ecf m\u1ecfng nguy hi\u1ec3m. Tuy nhi\u00ean, th\u1eed Rockwell ho\u00e0n to\u00e0n ph\u00f9 h\u1ee3p \u0111\u1ec3 x\u00e1c minh \u0111\u1ed9 c\u1ee9ng l\u00f5i tr\u00ean m\u1ed9t m\u1eb7t c\u1eaft c\u1ee7a b\u00e1nh r\u0103ng.<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed Micro: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fang \u0111\u1ec3 \u0111\u1eb7c tr\u01b0ng l\u1edbp v\u1ecf l\u00e0 th\u1ef1c hi\u1ec7n \u0111o \u0111\u1ed9 c\u1ee9ng vi m\u00f4. Ch\u00fang t\u00f4i c\u1eaft m\u1eb7t r\u0103ng b\u00e1nh r\u0103ng, m\u00e0i nh\u1eb5n \u0111\u1ebfn \u0111\u1ed9 b\u00f3ng kim lo\u1ea1i, r\u1ed3i s\u1eed d\u1ee5ng m\u00e1y th\u1eed Micro-Vickers ho\u1eb7c Knoop \u0111\u1ec3 t\u1ea1o ra m\u1ed9t lo\u1ea1t c\u00e1c v\u1ebft l\u00f5m nh\u1ecf t\u1ea1i c\u00e1c kho\u1ea3ng c\u00e1ch ch\u00ednh x\u00e1c. Ch\u00fang t\u00f4i b\u1eaft \u0111\u1ea7u g\u1ea7n m\u00e9p ngo\u00e0i v\u00e0 di chuy\u1ec3n v\u00e0o trong v\u1ec1 ph\u00eda l\u00f5i.<\/li>\n<li>K\u1ebft lu\u1eadn: V\u1ebd \u0111\u1ed3 th\u1ecb c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ed9 c\u1ee9ng so v\u1edbi kho\u1ea3ng c\u00e1ch t\u1eeb b\u1ec1 m\u1eb7t t\u1ea1o th\u00e0nh m\u1ed9t \u201ch\u1ed3 s\u01a1 \u0111\u1ed9 c\u1ee9ng.\u201d Bi\u1ec3u \u0111\u1ed3 n\u00e0y l\u00e0 h\u1ed3 s\u01a1 ch\u1ea5t l\u01b0\u1ee3ng ch\u00ednh th\u1ee9c. N\u00f3 r\u00f5 r\u00e0ng cho th\u1ea5y \u0111\u1ed9 c\u1ee9ng t\u1ed1i \u0111a tr\u00ean b\u1ec1 m\u1eb7t, \u0111\u1ed9 c\u1ee9ng t\u1ea1i l\u00f5i, v\u00e0 quan tr\u1ecdng nh\u1ea5t, \u0111\u1ed9 s\u00e2u l\u1edbp v\u1ecf hi\u1ec7u qu\u1ea3 \u2014 kho\u1ea3ng c\u00e1ch m\u00e0 \u0111\u1ed9 c\u1ee9ng v\u1eabn duy tr\u00ec tr\u00ean m\u1ed9t ng\u01b0\u1ee1ng quan tr\u1ecdng (v\u00ed d\u1ee5, 50 HRC). \u0110i\u1ec1u n\u00e0y ch\u1ee9ng minh t\u1ea1i sao s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed th\u01b0\u1eddng l\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt t\u1ed1t nh\u1ea5t: \u0111o \u0111\u1ed9 c\u1ee9ng vi m\u00f4 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh gradient v\u00e0 th\u1eed \u0111\u1ed9 c\u1ee9ng macro \u0111\u1ec3 ki\u1ec3m tra l\u00f5i l\u1edbn.<\/li>\n<\/ol>\n<table>\n<tbody>\n<tr>\n<td width=\"144\">T\u00ecnh hu\u1ed1ng \u1ee8ng D\u1ee5ng<\/td>\n<td width=\"144\">Khuy\u1ebfn ngh\u1ecb ch\u00ednh<\/td>\n<td width=\"144\">L\u1ef1a ch\u1ecdn ph\u1ee5 \/ Th\u1eed l\u00f5i<\/td>\n<td width=\"144\">L\u00fd do k\u1ef9 thu\u1eadt ch\u00ednh<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u0110\u1ed9 c\u1ee9ng t\u1ed5ng th\u1ec3 c\u1ee7a <a href=\"https:\/\/productionscrews.com\/vi\/advanced-steel-forging-engineering-the-future-of-strong-metal-parts\/\"  data-wpil-monitor-id=\"490\" target=\"_blank\">Luy\u1ec7n kim th\u00e9p<\/a><\/strong><\/td>\n<td width=\"144\">Brinell (HBW)<\/td>\n<td width=\"144\">Rockwell B\/C (HRB\/HRC)<\/td>\n<td width=\"144\">Trung b\u00ecnh c\u00e1c bi\u1ebfn th\u1ec3 vi c\u1ea5u tr\u00fac tr\u00ean di\u1ec7n t\u00edch l\u1edbn.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong><a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-to-spring-clip-production-materials-steps-quality-control\/\"  data-wpil-monitor-id=\"491\" target=\"_blank\">Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/a> C\u00e1c b\u1ed9 ph\u1eadn nhi\u1ec7t luy\u1ec7n<\/strong><\/td>\n<td width=\"144\">Rockwell (HRC)<\/td>\n<td width=\"144\">Vickers (HV)<\/td>\n<td width=\"144\">T\u1ed1c \u0111\u1ed9, t\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 \u0111\u1ed9 tin c\u1eady l\u00e0m cho n\u00f3 l\u00fd t\u01b0\u1edfng cho m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>L\u1edbp ph\u1ee7 nitride m\u1ecfng tr\u00ean d\u1ee5ng c\u1ee5<\/strong><\/td>\n<td width=\"144\">Knoop (HK)<\/td>\n<td width=\"144\">Vickers (HV) \u1edf t\u1ea3i tr\u1ecdng r\u1ea5t th\u1ea5p<\/td>\n<td width=\"144\">V\u1ebft l\u00f5m k\u00e9o d\u00e0i gi\u1ea3m thi\u1ec3u s\u1ef1 th\u1ea5m s\u00e2u v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u1ec1n substrate.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>Ph\u00e2n t\u00edch v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t c\u1ee7a h\u00e0n (HAZ)<\/strong><\/td>\n<td width=\"144\">Micro-Vickers (HV)<\/td>\n<td width=\"144\">Kh\u00f4ng \u00e1p d\u1ee5ng<\/td>\n<td width=\"144\">\u0110\u1ea7u nh\u1ea5n nh\u1ecf c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1ed1c c\u1ee9ng \u0111\u1eb7c qua v\u00f9ng HAZ.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\"><strong>\u0110\u1ed9 c\u1ee9ng c\u1ee7a m\u1ed9t chi\u1ebfc \u0111\u0129a g\u1ed1m<\/strong><\/td>\n<td width=\"144\">Vickers (HV) \/ Knoop (HK)<\/td>\n<td width=\"144\">Rockwell A (HRA)<\/td>\n<td width=\"144\">M\u0169i nh\u1ecdn kim c\u01b0\u01a1ng l\u00e0 c\u1ea7n thi\u1ebft; ph\u01b0\u01a1ng ph\u00e1p Vickers l\u00e0 ti\u00eau chu\u1ea9n, Knoop gi\u1ea3m nguy c\u01a1 n\u1ee9t v\u1ee1.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M.jpg\" height=\"1067\" width=\"1600\" class=\"alignnone size-full wp-image-2605\" alt=\"C\u00e1c bu l\u00f4ng m\u1eb7t b\u00edch ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 \u1ed1c v\u00edt c\u00f4ng nghi\u1ec7p cho gi\u1ea3i ph\u00e1p c\u1ed1 \u0111\u1ecbnh b\u1ec1n b\u1ec9. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 tin c\u1eady trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M.jpg 1600w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M-1536x1024.jpg 1536w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/10\/unsplash-qLtS2ermG3M-18x12.jpg 18w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/> <\/h2>\n<h2>K\u1ebft lu\u1eadn: T\u1eeb nguy\u00ean t\u1eafc \u0111\u1ebfn th\u1ef1c h\u00e0nh<\/h2>\n<p>Ch\u00fang t\u00f4i \u0111\u00e3 ph\u00e2n t\u00edch c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng n\u1ec1n t\u1ea3ng, t\u1eeb nguy\u00ean l\u00fd c\u1ed1t l\u00f5i \u0111\u1ebfn th\u1ef1c hi\u1ec7n th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang. Nh\u1eefng kh\u00e1c bi\u1ec7t k\u1ef9 thu\u1eadt ch\u00ednh r\u00f5 r\u00e0ng: ph\u01b0\u01a1ng ph\u00e1p Brinell \u0111o \u0111\u1ed9 c\u1ee9ng d\u1ef1a tr\u00ean di\u1ec7n t\u00edch v\u1ebft l\u00f5m, Rockwell d\u1ef1a tr\u00ean \u0111\u1ed9 s\u00e2u kh\u00e1c bi\u1ec7t, c\u00f2n Vickers v\u00e0 Knoop d\u1ef1a tr\u00ean \u0111o ch\u00e9o qua quang h\u1ecdc. C\u01a1 ch\u1ebf \u0111\u1eb7c tr\u01b0ng c\u1ee7a t\u1eebng ph\u01b0\u01a1ng ph\u00e1p l\u00e0m cho ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u v\u00e0 \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n<p>Tuy nhi\u00ean, \u0111i\u1ec3m quan tr\u1ecdng nh\u1ea5t l\u00e0 s\u1ed1 c\u1ee9ng kh\u00f4ng c\u00f3 \u00fd ngh\u0129a n\u1ebfu kh\u00f4ng c\u00f3 ng\u1eef c\u1ea3nh. N\u0103ng l\u1ef1c chuy\u00ean nghi\u1ec7p th\u1ef1c s\u1ef1 kh\u00f4ng ch\u1ec9 \u1edf vi\u1ec7c v\u1eadn h\u00e0nh m\u00e1y m\u00f3c \u0111\u01a1n thu\u1ea7n, m\u00e0 \u1edf vi\u1ec7c hi\u1ec3u c\u00e1c nguy\u00ean l\u00fd li\u00ean quan. Hi\u1ec3u c\u00e1ch h\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ea7u \u0111o t\u1ea1o ra c\u00e1c tr\u01b0\u1eddng \u1ee9ng su\u1ea5t \u0111\u1eb7c th\u00f9, c\u00e1ch c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u nh\u01b0 c\u1ee9ng h\u00f3a bi\u1ebfn d\u1ea1ng g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng x\u1ebfp ch\u1ed3ng ho\u1eb7c l\u00f5m v\u00e0o, v\u00e0 c\u00e1ch c\u00e1c chi ti\u1ebft nh\u1ecf nh\u01b0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c v\u1ebft l\u00f5m c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch d\u1eef li\u1ec7u\u2014\u0111\u00e2y m\u1edbi l\u00e0 \u0111i\u1ec1u ph\u00e2n bi\u1ec7t k\u1ef9 thu\u1eadt vi\u00ean v\u1edbi chuy\u00ean gia k\u1ef9 thu\u1eadt v\u1eadt li\u1ec7u. V\u1edbi ki\u1ebfn th\u1ee9c s\u00e2u h\u01a1n n\u00e0y, b\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p th\u1eed ph\u00f9 h\u1ee3p, d\u1ef1 \u0111o\u00e1n v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c ngu\u1ed3n sai s\u1ed1, c\u0169ng nh\u01b0 di\u1ec5n gi\u1ea3i k\u1ebft qu\u1ea3 m\u1ed9t c\u00e1ch t\u1ef1 tin \u0111\u1ec3 th\u00fac \u0111\u1ea9y thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n, s\u1ea3n xu\u1ea5t b\u1ec1n v\u1eefng h\u01a1n v\u00e0 ph\u00e2n t\u00edch h\u1ecfng h\u00f3c s\u00e2u s\u1eafc h\u01a1n.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng \u2013 ASTM Qu\u1ed1c t\u1ebf <a class=\"underline\" href=\"https:\/\/www.astm.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.astm.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ki\u1ec3m tra v\u00e0 \u0110\u1eb7c t\u00ednh v\u1eadt li\u1ec7u \u2013 ASM Qu\u1ed1c t\u1ebf <a class=\"underline\" href=\"https:\/\/www.asminternational.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.asminternational.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng \u2013 Wikipedia <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Hardness\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Hardness<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n ki\u1ec3m tra c\u01a1 h\u1ecdc \u2013 ISO <a class=\"underline\" href=\"https:\/\/www.iso.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.iso.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Khoa h\u1ecdc v\u00e0 K\u1ef9 thu\u1eadt V\u1eadt li\u1ec7u \u2013 NIST <a class=\"underline\" href=\"https:\/\/www.nist.gov\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.nist.gov\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ki\u1ec3m tra Ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 V\u1eadt li\u1ec7u \u2013 ASQ (Hi\u1ec7p h\u1ed9i Ch\u1ea5t l\u01b0\u1ee3ng Hoa K\u1ef3) <a class=\"underline\" href=\"https:\/\/asq.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/asq.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed \u2013 ASME <a class=\"underline\" href=\"https:\/\/www.asme.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.asme.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra v\u1eadt li\u1ec7u \u2013 ScienceDirect <a class=\"underline\" href=\"https:\/\/www.sciencedirect.com\/topics\/engineering\/hardness-testing\" target=\"_blank\" rel=\"noopener\">https:\/\/www.sciencedirect.com\/topics\/engineering\/hardness-testing<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t v\u00e0 ki\u1ec3m tra \u2013 Thomasnet <a class=\"underline\" href=\"https:\/\/www.thomasnet.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.thomasnet.com\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\">Gi\u00e1o d\u1ee5c K\u1ef9 thu\u1eadt V\u1eadt li\u1ec7u \u2013 MIT OpenCourseWare <a class=\"underline\" href=\"https:\/\/ocw.mit.edu\/\" target=\"_blank\" rel=\"noopener\">https:\/\/ocw.mit.edu\/<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>A Guide to Hardness Testing: Understanding How Materials Resist Force Introduction: Why This Knowledge Matters We once looked at a serious failure in a high-stress bolted assembly. The component specifications required a specific core hardness, which quality control confirmed using a standard Rockwell test. The parts passed. Weeks later, the bolts failed in service. The [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2604","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-5g-communication-fasteners"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=2604"}],"version-history":[{"count":3,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2604\/revisions"}],"predecessor-version":[{"id":2878,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2604\/revisions\/2878"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/2608"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=2604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=2604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=2604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}