{"id":2447,"date":"2025-09-30T14:31:55","date_gmt":"2025-09-30T14:31:55","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-09-30T14:31:55","modified_gmt":"2025-09-30T14:31:55","slug":"ultimate-guide-stainless-steel-bar-selection-prevent-costly-mistakes-failures","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/ultimate-guide-stainless-steel-bar-selection-prevent-costly-mistakes-failures\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn T\u1ed1i \u01afu: L\u1ef1a Ch\u1ecdn Thanh Inox \u2013 Ng\u0103n Ng\u1eeba Sai L\u1ea7m &amp; H\u1ecfng H\u00f3c T\u1ed1n K\u00e9m"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u: Nh\u1eefng \u0111i\u1ec1u b\u1ea1n c\u1ea7n bi\u1ebft<\/h2>\n<p>Thanh inox l\u00e0 m\u1ed9t \u0111o\u1ea1n inox \u0111\u1eb7c, d\u00e0i, c\u00f3 nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau nh\u01b0 tr\u00f2n, vu\u00f4ng, l\u1ee5c gi\u00e1c ho\u1eb7c d\u1eb9t. Nghe c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, nh\u01b0ng vi\u1ec7c ch\u1ecdn \u0111\u00fang thanh inox \u0111\u00f2i h\u1ecfi ph\u1ea3i suy ngh\u0129 c\u1ea9n th\u1eadn. Ch\u1ecdn sai lo\u1ea1i kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t sai l\u1ea7m nh\u1ecf \u2013 n\u00f3 c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng nh\u01b0 h\u1ecfng h\u00f3c s\u1edbm, chi ph\u00ed ph\u00e1t sinh v\u00e0 r\u1ee7i ro v\u1ec1 an to\u00e0n. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t c\u1ea5u tr\u00fac t\u1ed3n t\u1ea1i h\u00e0ng th\u1eadp k\u1ef7 v\u00e0 m\u1ed9t c\u1ea5u tr\u00fac b\u1ecb ph\u00e1 v\u1ee1 trong v\u00e0i th\u00e1ng th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 v\u1eadt li\u1ec7u.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y v\u01b0\u1ee3t xa nh\u1eefng m\u00f4 t\u1ea3 c\u01a1 b\u1ea3n. Ch\u00fang ta s\u1ebd xem x\u00e9t v\u1eadt li\u1ec7u t\u1eeb c\u1ea5u t\u1ea1o c\u1ed1t l\u00f5i \u0111\u1ebfn c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi \u00e1p l\u1ef1c trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. \u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0, ng\u01b0\u1eddi mua ho\u1eb7c nh\u00e0 x\u00e2y d\u1ef1ng, ki\u1ebfn th\u1ee9c n\u00e0y kh\u00f4ng ch\u1ec9 l\u00e0 l\u00fd thuy\u1ebft \u2013 n\u00f3 r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ed9t d\u1ef1 \u00e1n th\u00e0nh c\u00f4ng. Hi\u1ec3u c\u00e1ch th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh c\u01b0\u1eddng \u0111\u1ed9 ph\u1ed1i h\u1ee3p v\u1edbi nhau l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 khai th\u00e1c t\u1ed1i \u0111a thanh inox. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o n\u00f3 s\u1ebd b\u1ec1n, ch\u1ed1ng g\u1ec9 v\u00e0 duy tr\u00ec \u0111\u1ed9 b\u1ec1n trong m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn. Ph\u00e2n t\u00edch n\u00e0y k\u1ebft n\u1ed1i c\u00e1c con s\u1ed1 tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u v\u1edbi m\u1ed9t b\u1ed9 ph\u1eadn \u0111\u00e1ng tin c\u1eady trong m\u1ed9t h\u1ec7 th\u1ed1ng quan tr\u1ecdng.<\/p>\n<h2>H\u00f3a H\u1ecdc C\u01a1 B\u1ea3n<\/h2>\n<p>T\u1eeb \u201cinox\u201d m\u00f4 t\u1ea3 m\u1ee9c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u1eadt li\u1ec7u, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t tr\u1ea1ng th\u00e1i ho\u00e0n h\u1ea3o. Kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 tuy\u1ec7t v\u1eddi c\u1ee7a v\u1eadt li\u1ec7u kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ef1 nhi\u00ean \u0111\u1ed1i v\u1edbi s\u1eaft m\u00e0 \u0111\u01b0\u1ee3c t\u1ea1o ra th\u00f4ng qua vi\u1ec7c tr\u1ed9n l\u1eabn c\u1ea9n th\u1eadn c\u00e1c kim lo\u1ea1i kh\u00e1c. Hi\u1ec3u n\u1ec1n t\u1ea3ng h\u00f3a h\u1ecdc n\u00e0y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u v\u00e0 d\u1ef1 \u0111o\u00e1n c\u00e1ch n\u00f3 s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng. C\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a b\u1ea5t k\u1ef3 thanh inox n\u00e0o ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng th\u1ee9c c\u00e1c nguy\u00ean t\u1ed1 c\u1ee7a n\u00f3.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-2451\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-898660.jpg\" alt=\"\u1ed1ng, th\u00e9p, kim lo\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9, x\u01b0\u1edfng, thanh, s\u1eaft, luy\u1ec7n kim, th\u00e9p, th\u00e9p, th\u00e9p, th\u00e9p, th\u00e9p, th\u00e9p kh\u00f4ng g\u1ec9, th\u00e9p kh\u00f4ng g\u1ec9, th\u00e9p kh\u00f4ng g\u1ec9, luy\u1ec7n kim\" width=\"1280\" height=\"799\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-898660.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-898660-300x187.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-898660-768x479.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-898660-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3>T\u1ea1i Sao Crom L\u1ea1i Quan Tr\u1ecdng<\/h3>\n<p>Nguy\u00ean t\u1ed1 quan tr\u1ecdng nh\u1ea5t trong inox l\u00e0 crom (Cr). \u0110\u1ec3 th\u00e9p \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 inox, n\u00f3 ph\u1ea3i ch\u1ee9a \u00edt nh\u1ea5t 10,5% crom theo tr\u1ecdng l\u01b0\u1ee3ng. Nguy\u00ean t\u1ed1 n\u00e0y l\u00e0 th\u1ee9 l\u00e0m cho v\u1eadt li\u1ec7u tr\u1edf n\u00ean \u201cth\u1ee5 \u0111\u1ed9ng\u201d. Khi ti\u1ebfp x\u00fac v\u1edbi oxy trong kh\u00f4ng kh\u00ed ho\u1eb7c n\u01b0\u1edbc, crom tr\u00ean b\u1ec1 m\u1eb7t th\u00e9p ph\u1ea3n \u1ee9ng t\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp oxit crom (Cr\u2082O\u2083) r\u1ea5t m\u1ecfng, \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ec1n.<\/p>\n<p>L\u1edbp th\u1ee5 \u0111\u1ed9ng n\u00e0y l\u00e0 l\u1edbp b\u1ea3o v\u1ec7 ch\u00ednh c\u1ee7a v\u1eadt li\u1ec7u ch\u1ed1ng l\u1ea1i r\u1ec9 s\u00e9t. N\u00f3 v\u00f4 h\u00ecnh \u0111\u1ed1i v\u1edbi m\u1eaft th\u01b0\u1eddng, ch\u1ec9 d\u00e0y v\u00e0i nanomet, nh\u01b0ng n\u00f3 ho\u1ea1t \u0111\u1ed9ng c\u1ef1c k\u1ef3 t\u1ed1t. Quan tr\u1ecdng nh\u1ea5t, n\u1ebfu b\u1ec1 m\u1eb7t b\u1ecb tr\u1ea7y x\u01b0\u1edbc ho\u1eb7c h\u01b0 h\u1ecfng, l\u1edbp n\u00e0y s\u1ebd t\u1ef1 s\u1eeda ch\u1eefa. Mi\u1ec5n l\u00e0 c\u00f3 oxy, crom ti\u1ebfp x\u00fac s\u1ebd ph\u1ea3n \u1ee9ng ngay l\u1eadp t\u1ee9c \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u1ea1i l\u1edbp m\u00e0ng oxit b\u1ea3o v\u1ec7, kh\u00f4i ph\u1ee5c kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 c\u1ee7a n\u00f3. H\u1ec7 th\u1ed1ng t\u1ef1 ph\u1ee5c h\u1ed3i, ch\u1ee7 \u0111\u1ed9ng n\u00e0y l\u00e0 th\u1ee9 th\u1ef1c s\u1ef1 \u0111\u1ecbnh ngh\u0129a inox.<\/p>\n<h3>C\u00e1c Nguy\u00ean T\u1ed1 B\u1ed5 Sung Quan Tr\u1ecdng<\/h3>\n<p>Trong khi crom cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 c\u01a1 b\u1ea3n, c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c \u0111\u01b0\u1ee3c th\u00eam v\u00e0o \u0111\u1ec3 t\u00f9y ch\u1ec9nh <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-spring-steel-properties-and-engineering-applications-2024\/\"  data-wpil-monitor-id=\"365\" target=\"_blank\">c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a th\u00e9p<\/a> cho c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 t\u1ed1t h\u01a1n, c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n ho\u1eb7c d\u1ec5 t\u1ea1o h\u00ecnh h\u01a1n.<\/p>\n<ul>\n<li>Niken (Ni): Ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh c\u1ea5u tr\u00fac tinh th\u1ec3 austenit \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. Pha austenit n\u00e0y mang l\u1ea1i cho c\u00e1c m\u00e1c nh\u01b0 304 v\u00e0 316 kh\u1ea3 n\u0103ng u\u1ed1n, t\u1ea1o h\u00ecnh v\u00e0 ch\u1ed1ng g\u00e3y tuy\u1ec7t v\u1eddi, ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 r\u1ea5t l\u1ea1nh. Niken c\u0169ng gi\u00fap ch\u1ed1ng l\u1ea1i m\u1ed9t s\u1ed1 axit v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li>Molypden (Mo): \u0110\u00e2y l\u00e0 m\u1ed9t s\u1ef1 b\u1ed5 sung quan tr\u1ecdng \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 c\u1ee5c b\u1ed9, \u0111\u1eb7c bi\u1ec7t l\u00e0 r\u1ed7 v\u00e0 \u0103n m\u00f2n k\u1ebd h\u1edf trong m\u00f4i tr\u01b0\u1eddng m\u1eb7n nh\u01b0 n\u01b0\u1edbc bi\u1ec3n ho\u1eb7c mu\u1ed1i \u0111\u01b0\u1eddng. \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u00e1c 316 v\u00e0 m\u00e1c 304.<\/li>\n<li>Mangan (Mn): M\u1ed9t ch\u1ea5t \u1ed5n \u0111\u1ecbnh austenit, mangan th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ed5 sung ho\u1eb7c, trong m\u1ed9t s\u1ed1 m\u00e1c (nh\u01b0 d\u00f2ng 200), thay th\u1ebf m\u1ed9t ph\u1ea7n niken v\u00ec l\u00fd do chi ph\u00ed. N\u00f3 c\u0169ng c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng.<\/li>\n<li>Cacbon (C): Cacbon l\u00e0 m\u1ed9t t\u00e1c nh\u00e2n t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n m\u1ea1nh m\u1ebd v\u00e0 l\u00e0m t\u0103ng \u0111\u1ed9 c\u1ee9ng. Tuy nhi\u00ean, trong th\u00e9p kh\u00f4ng g\u1ec9, n\u00f3 c\u00f3 th\u1ec3 g\u00e2y h\u1ea1i cho kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9. N\u1ebfu h\u00e0m l\u01b0\u1ee3ng cacbon qu\u00e1 cao, n\u00f3 c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u1edbi crom \u0111\u1ec3 t\u1ea1o th\u00e0nh cacbua crom \u1edf ranh gi\u1edbi h\u1ea1t trong qu\u00e1 tr\u00ecnh h\u00e0n ho\u1eb7c <a href=\"https:\/\/productionscrews.com\/vi\/5-secrets-of-heat-treatment-process-engineering-metal-properties-revealed\/\"  data-wpil-monitor-id=\"362\" target=\"_blank\">x\u1eed l\u00fd nhi\u1ec7t<\/a>. Qu\u00e1 tr\u00ecnh n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nh\u1ea1y c\u1ea3m h\u00f3a, lo\u1ea1i b\u1ecf crom kh\u1ecfi khu v\u1ef1c xung quanh c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec l\u1edbp th\u1ee5 \u0111\u1ed9ng, khi\u1ebfn n\u00f3 d\u1ec5 b\u1ecb \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t. \u0110\u1ec3 ng\u0103n ch\u1eb7n \u0111i\u1ec1u n\u00e0y, c\u00e1c m\u00e1c \u201cL\u201d \u00edt cacbon (v\u00ed d\u1ee5: 304L, 316L) v\u1edbi t\u1ed1i \u0111a 0,03% cacbon \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh cho c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0n.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2450\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-3144281.jpg\" alt=\"th\u00e9p, th\u00e9p kh\u00f4ng g\u1ec9, cr\u00f4m, thi\u1ebft b\u1ecb\" width=\"1280\" height=\"848\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-3144281.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-3144281-300x199.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-3144281-768x509.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-3144281-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3>B\u1ea3ng 1: So S\u00e1nh Th\u00e0nh Ph\u1ea7n H\u00f3a H\u1ecdc<\/h3>\n<p>B\u1ea3ng n\u00e0y th\u1ec3 hi\u1ec7n th\u00e0nh ph\u1ea7n \u0111i\u1ec3n h\u00ecnh c\u1ee7a c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ph\u1ed5 bi\u1ebfn, minh h\u1ecda m\u1ed1i li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 b\u1ed5 sung v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a nh\u00f3m v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a lo\u1ea1i th\u00e9p \u0111\u00f3.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"96\">H\u1ec7 Th\u1ed1ng Th\u00e9p Kh\u00f4ng G\u1ec9<\/td>\n<td width=\"96\">Lo\u1ea1i Th\u00e9p V\u00ed D\u1ee5<\/td>\n<td width=\"96\">Chromium (Cr) \u0110i\u1ec3n H\u00ecnh %<\/td>\n<td width=\"96\">Nickel (Ni) \u0110i\u1ec3n H\u00ecnh %<\/td>\n<td width=\"96\">Molybdenum (Mo) \u0110i\u1ec3n H\u00ecnh %<\/td>\n<td width=\"96\">Cacbon (C) \u0110i\u1ec3n H\u00ecnh %<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Austenitic<\/td>\n<td width=\"96\">304<\/td>\n<td width=\"96\">18.0 &#8211; 20.0<\/td>\n<td width=\"96\">8.0 &#8211; 10.5<\/td>\n<td width=\"96\">&#8211;<\/td>\n<td width=\"96\">&lt; 0.08<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Austenitic<\/td>\n<td width=\"96\">316<\/td>\n<td width=\"96\">16.0 &#8211; 18.0<\/td>\n<td width=\"96\">10.0 &#8211; 14.0<\/td>\n<td width=\"96\">2.0 &#8211; 3.0<\/td>\n<td width=\"96\">&lt; 0.08<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Ferritic<\/td>\n<td width=\"96\">430<\/td>\n<td width=\"96\">16.0 &#8211; 18.0<\/td>\n<td width=\"96\">&#8211;<\/td>\n<td width=\"96\">&#8211;<\/td>\n<td width=\"96\">&lt; 0.12<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">Martensitic<\/td>\n<td width=\"96\">410<\/td>\n<td width=\"96\">11.5 &#8211; 13.5<\/td>\n<td width=\"96\">&#8211;<\/td>\n<td width=\"96\">&#8211;<\/td>\n<td width=\"96\">&lt; 0.15<\/td>\n<\/tr>\n<tr>\n<td width=\"96\">D\u00faplex (Aust-Ferritic)<\/td>\n<td width=\"96\">2205<\/td>\n<td width=\"96\">22.0 &#8211; 23.0<\/td>\n<td width=\"96\">4.5 &#8211; 6.5<\/td>\n<td width=\"96\">3.0 &#8211; 3.5<\/td>\n<td width=\"96\">&lt; 0.03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Qu\u00e1 Tr\u00ecnh T\u1ea1o Ra Thanh Th\u00e9p Kh\u00f4ng G\u1ec9<\/h2>\n<p>H\u00e0nh tr\u00ecnh c\u1ee7a m\u1ed9t thanh th\u00e9p kh\u00f4ng g\u1ec9 t\u1eeb nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ebfn s\u1ea3n ph\u1ea9m ho\u00e0n ch\u1ec9nh bao g\u1ed3m c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn k\u00edch th\u01b0\u1edbc cu\u1ed1i c\u00f9ng, ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1eb7c t\u00ednh ch\u1ecbu l\u1ef1c. Hai ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh l\u00e0 c\u00e1n n\u00f3ng v\u00e0 ho\u00e0n thi\u1ec7n l\u1ea1nh. L\u1ef1a ch\u1ecdn gi\u1eefa ch\u00fang kh\u00f4ng ph\u1ea3i ng\u1eabu nhi\u00ean; \u0111\u00f3 l\u00e0 quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf quan tr\u1ecdng d\u1ef1a tr\u00ean y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111\u1ed9 b\u1ec1n v\u00e0 ngo\u1ea1i h\u00ecnh c\u1ee7a \u1ee9ng d\u1ee5ng.<\/p>\n<h3>C\u00e1n N\u00f3ng: Quy Tr\u00ecnh C\u01a1 B\u1ea3n<\/h3>\n<p>C\u00e1n n\u00f3ng l\u00e0 quy tr\u00ecnh c\u01a1 b\u1ea3n \u0111\u1ec3 s\u1ea3n xu\u1ea5t thanh th\u00e9p kh\u00f4ng g\u1ec9. N\u00f3 bao g\u1ed3m vi\u1ec7c nung n\u00f3ng m\u1ed9t kh\u1ed1i th\u00e9p \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 tr\u00ean \u0111i\u1ec3m tinh th\u1ec3 l\u1ea1i \u2013 th\u01b0\u1eddng tr\u00ean 1.100\u00b0C \u2013 v\u00e0 \u0111\u01b0a qua m\u1ed9t lo\u1ea1t tr\u1ee5c c\u00e1n \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh d\u1ea7n th\u00e0nh d\u1ea1ng m\u1eb7t c\u1eaft mong mu\u1ed1n.<\/p>\n<ol>\n<li>Quy tr\u00ecnh: Nhi\u1ec7t \u0111\u1ed9 cao l\u00e0m cho th\u00e9p r\u1ea5t d\u1ec5 u\u1ed1n cong, cho ph\u00e9p gi\u1ea3m k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng \u0111\u00e1ng k\u1ec3 m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p h\u01a1n so v\u1edbi gia c\u00f4ng l\u1ea1nh.<\/li>\n<li>C\u00e1c \u0111\u1eb7c t\u00ednh thu \u0111\u01b0\u1ee3c: Qu\u00e1 tr\u00ecnh n\u00e0y tinh ch\u1ec9nh c\u1ea5u tr\u00fac h\u1ea1t nh\u01b0ng d\u1eabn \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng th\u1ea5p h\u01a1n so v\u1edbi s\u1ea3n ph\u1ea9m t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u0111\u01b0\u1ee3c gia c\u00f4ng ngu\u1ed9i. Thanh c\u00f3 \u1ee9ng su\u1ea5t b\u00ean trong t\u1ed1i thi\u1ec3u, l\u00e0m cho n\u00f3 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/li>\n<li>\u0110\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: Khi thanh ngu\u1ed9i \u0111i, m\u1ed9t l\u1edbp v\u1ea3y s\u1eabm m\u00e0u, th\u00f4 r\u00e1p h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t. L\u1edbp n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf th\u00f4ng qua \u1ee7 (a <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-to-metal-heat-treatment-transform-metal-properties-like-a-pro\/\"  data-wpil-monitor-id=\"366\" target=\"_blank\">x\u1eed l\u00fd nhi\u1ec7t<\/a> \u0111\u1ec3 l\u00e0m m\u1ec1m th\u00e9p v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng u\u1ed1n) v\u00e0 t\u1ea9y (m\u1ed9t b\u1ec3 axit \u0111\u1ec3 lo\u1ea1i b\u1ecf l\u1edbp v\u1ea3y). \u0110\u1ed9 ho\u00e0n thi\u1ec7n thu \u0111\u01b0\u1ee3c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1n n\u00f3ng, \u1ee7 v\u00e0 t\u1ea9y (HRAP). N\u00f3 s\u1ea1ch nh\u01b0ng c\u00f3 k\u1ebft c\u1ea5u x\u1ec9n m\u00e0u, m\u1edd v\u00e0 h\u01a1i th\u00f4 r\u00e1p.<\/li>\n<li>\u0110\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc: Do co ng\u00f3t nhi\u1ec7t v\u00e0 b\u1ea3n ch\u1ea5t c\u1ee7a quy tr\u00ecnh, c\u00e1c thanh c\u00e1n n\u00f3ng c\u00f3 k\u00edch th\u01b0\u1edbc k\u00e9m ch\u00ednh x\u00e1c h\u01a1n v\u00e0 dung sai r\u1ed9ng h\u01a1n v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 th\u1eb3ng.<\/li>\n<li>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: C\u00e1c thanh th\u00e9p kh\u00f4ng g\u1ec9 c\u00e1n n\u00f3ng r\u1ea5t l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng k\u1ebft c\u1ea5u, gi\u00e1 \u0111\u1ee1 v\u00e0 ch\u1ebf t\u1ea1o chung, n\u01a1i \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc ch\u1eb7t ch\u1ebd v\u00e0 \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t t\u1ed1t kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed1i quan t\u00e2m ch\u00ednh. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 l\u00e0 <a href=\"https:\/\/productionscrews.com\/vi\/raw-material-testing-a-comprehensive-guide-to-quality-control-methods-2024\/\"  data-wpil-monitor-id=\"364\" target=\"_blank\">v\u1eadt li\u1ec7u th\u00f4<\/a> cho nhi\u1ec1u b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c gia c\u00f4ng v\u00e0 r\u00e8n.<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-4607197.jpg\" height=\"853\" width=\"1280\" class=\"alignnone size-full wp-image-2449\" alt=\"Bu l\u00f4ng m\u1eb7t b\u00edch th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ea5t l\u01b0\u1ee3ng cao cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. C\u00e1c ph\u1ee5 ki\u1ec7n b\u1ec1n, ch\u1ed1ng \u0103n m\u00f2n l\u00fd t\u01b0\u1edfng cho m\u00e1y m\u00f3c v\u00e0 c\u00e1c d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-4607197.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-4607197-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-4607197-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-4607197-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h3>Ho\u00e0n thi\u1ec7n ngu\u1ed9i: \u0110\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 b\u1ec1n<\/h3>\n<p>Ho\u00e0n thi\u1ec7n ngu\u1ed9i l\u00e0 m\u1ed9t quy tr\u00ecnh th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean m\u1ed9t thanh c\u00e1n n\u00f3ng tr\u01b0\u1edbc \u0111\u00f3. S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh l\u00e0 t\u1ea5t c\u1ea3 c\u00f4ng vi\u1ec7c \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 k\u1ebft tinh l\u1ea1i c\u1ee7a th\u00e9p. Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 k\u00e9o ngu\u1ed9i, trong \u0111\u00f3 m\u1ed9t thanh c\u00e1n n\u00f3ng \u0111\u01b0\u1ee3c k\u00e9o qua m\u1ed9t khu\u00f4n ch\u00ednh x\u00e1c nh\u1ecf h\u01a1n \u0111\u01b0\u1eddng k\u00ednh ban \u0111\u1ea7u c\u1ee7a thanh. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c bao g\u1ed3m m\u00e0i v\u00e0 \u0111\u00e1nh b\u00f3ng \u0111\u1ec3 c\u00f3 \u0111\u1ed9 ho\u00e0n thi\u1ec7n v\u00e0 dung sai t\u1ed1t h\u01a1n.<\/p>\n<p>Trong c\u00e1c x\u01b0\u1edfng ch\u1ebf t\u1ea1o, ch\u00fang ta th\u01b0\u1eddng th\u1ea5y c\u00e1c v\u1ea5n \u0111\u1ec1 khi m\u1ed9t nh\u00e0 thi\u1ebft k\u1ebf ch\u1ec9 \u0111\u1ecbnh m\u1ed9t thanh c\u00e1n n\u00f3ng cho m\u1ed9t c\u00f4ng vi\u1ec7c gia c\u00f4ng CNC c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao. Dung sai l\u1ecfng l\u1ebbo v\u00e0 b\u1ec1 m\u1eb7t th\u00f4 r\u00e1p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng th\u00e1ch th\u1ee9c trong gia c\u00f4ng, t\u0103ng \u0111\u1ed9 m\u00e0i m\u00f2n d\u1ee5ng c\u1ee5 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn cu\u1ed1i c\u00f9ng kh\u00f4ng nh\u1ea5t qu\u00e1n. \u0110\u00e2y l\u00e0 m\u1ed9t tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec3n h\u00ecnh, trong \u0111\u00f3 m\u1ed9t thanh k\u00e9o ngu\u1ed9i s\u1ebd l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn ngay t\u1eeb \u0111\u1ea7u, gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c b\u1ed9 ph\u1eadn.<\/p>\n<ol>\n<li>Quy tr\u00ecnh: T\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc c\u1ee7a vi\u1ec7c k\u00e9o thanh qua khu\u00f4n l\u00e0m bi\u1ebfn d\u1ea1ng d\u1ebbo th\u00e9p. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 l\u00e0m c\u1ee9ng ngu\u1ed9i ho\u1eb7c l\u00e0m c\u1ee9ng bi\u1ebfn d\u1ea1ng.<\/li>\n<li>C\u00e1c \u0111\u1eb7c t\u00ednh thu \u0111\u01b0\u1ee3c: L\u00e0m c\u1ee9ng ngu\u1ed9i l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a thanh. S\u1ef1 t\u0103ng \u0111\u1ed9 b\u1ec1n n\u00e0y ph\u1ea3i tr\u1ea3 gi\u00e1 b\u1eb1ng vi\u1ec7c gi\u1ea3m kh\u1ea3 n\u0103ng u\u1ed1n; thanh tr\u1edf n\u00ean kh\u00f3 t\u1ea1o h\u00ecnh h\u01a1n.<\/li>\n<li>\u0110\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t: C\u00e1c thanh ho\u00e0n thi\u1ec7n ngu\u1ed9i c\u00f3 b\u1ec1 m\u1eb7t nh\u1eb5n, s\u00e1ng v\u00e0 th\u01b0\u1eddng ph\u1ea3n chi\u1ebfu, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 k\u00e9o ngu\u1ed9i (CD) ho\u1eb7c k\u00e9o s\u00e1ng.<\/li>\n<li>\u0110\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc: Vi\u1ec7c s\u1eed d\u1ee5ng khu\u00f4n ch\u00ednh x\u00e1c mang l\u1ea1i k\u00edch th\u01b0\u1edbc r\u1ea5t ch\u00ednh x\u00e1c v\u00e0 nh\u1ea5t qu\u00e1n, dung sai ch\u1eb7t ch\u1ebd v\u00e0 \u0111\u1ed9 th\u1eb3ng tuy\u1ec7t v\u1eddi.<\/li>\n<li>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: \u0110\u1ed9 ho\u00e0n thi\u1ec7n v\u01b0\u1ee3t tr\u1ed9i, dung sai ch\u1eb7t ch\u1ebd v\u00e0 \u0111\u1ed9 b\u1ec1n t\u0103ng l\u00ean l\u00e0m cho c\u00e1c thanh th\u00e9p kh\u00f4ng g\u1ec9 ho\u00e0n thi\u1ec7n ngu\u1ed9i tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho gia c\u00f4ng t\u1ed1c \u0111\u1ed9 cao, tr\u1ee5c b\u01a1m, van, \u1ed1c v\u00edt, v\u00f2ng bi v\u00e0 b\u1ea5t k\u1ef3 th\u00e0nh ph\u1ea7n n\u00e0o \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 b\u1ec1 m\u1eb7t nh\u1eb5n.<\/li>\n<\/ol>\n<h3>B\u1ea3ng 2: So s\u00e1nh c\u00e1n n\u00f3ng v\u00e0 ho\u00e0n thi\u1ec7n ngu\u1ed9i<\/h3>\n<p>B\u1ea3ng n\u00e0y cung c\u1ea5p so s\u00e1nh k\u1ef9 thu\u1eadt tr\u1ef1c ti\u1ebfp gi\u1eefa hai <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-to-stud-screw-process-manufacturing-excellence-revealed\/\"  data-wpil-monitor-id=\"367\" target=\"_blank\">quy tr\u00ecnh s\u1ea3n xu\u1ea5t<\/a>, \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o nhanh \u0111\u1ec3 \u0111\u1eb7c t\u1ea3.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"192\">Thu\u1ed9c t\u00ednh<\/td>\n<td width=\"192\">Th\u00e9p tr\u00f2n c\u00e1n n\u00f3ng (HRAP)<\/td>\n<td width=\"192\">Th\u00e9p tr\u00f2n ho\u00e0n thi\u1ec7n l\u1ea1nh (CD)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td>\n<td width=\"192\">Th\u1ea5p h\u01a1n<\/td>\n<td width=\"192\">Cao h\u01a1n (t\u0103ng do c\u1ee9ng h\u00f3a b\u1eb1ng gia c\u00f4ng)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">\u0110\u1ed9 c\u1ee9ng<\/td>\n<td width=\"192\">Th\u1ea5p h\u01a1n<\/td>\n<td width=\"192\">Cao h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">\u0110\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc<\/td>\n<td width=\"192\">Dung sai r\u1ed9ng h\u01a1n (+\/-)<\/td>\n<td width=\"192\">Dung sai ch\u1eb7t h\u01a1n (+\/-)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">Ho\u00e0n thi\u1ec7n B\u1ec1 m\u1eb7t<\/td>\n<td width=\"192\">M\u1edd, m\u1ecbn, h\u01a1i nh\u00e1m (lo\u1ea1i b\u1ecf v\u1ea3y)<\/td>\n<td width=\"192\">M\u1ecbn, s\u00e1ng b\u00f3ng, c\u00f3 th\u1ec3 ph\u1ea3n chi\u1ebfu<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">\u0110\u1ed9 th\u1eb3ng<\/td>\n<td width=\"192\">T\u1ed1t, nh\u01b0ng \u00edt ch\u00ednh x\u00e1c h\u01a1n<\/td>\n<td width=\"192\">Xu\u1ea5t s\u1eafc, ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">Chi ph\u00ed t\u01b0\u01a1ng \u0111\u1ed1i<\/td>\n<td width=\"192\">Th\u1ea5p h\u01a1n (\u00edt gia c\u00f4ng h\u01a1n)<\/td>\n<td width=\"192\">Cao h\u01a1n (b\u01b0\u1edbc gia c\u00f4ng b\u1ed5 sung)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\">\u1ee8 \u0111\u1ecdng n\u1ed9i b\u1ed9<\/td>\n<td width=\"192\">Th\u1ea5p<\/td>\n<td width=\"192\">Cao (c\u00f3 th\u1ec3 g\u00e2y bi\u1ebfn d\u1ea1ng n\u1ebfu gia c\u00f4ng kh\u00f4ng \u0111\u1ed1i x\u1ee9ng)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Thu\u1ed9c t\u00ednh \u0111\u1ed9 b\u1ec1n d\u01b0\u1edbi t\u1ea3i tr\u1ecdng<\/h2>\n<p>M\u1ed9t k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf d\u1ef1a tr\u00ean c\u00e1c s\u1ed1 li\u1ec7u. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 t\u1ea1o ra m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c thu\u1ed9c t\u00ednh \u0111\u1ed9 b\u1ec1n c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u01b0\u1ee3c. Nh\u1eefng gi\u00e1 tr\u1ecb n\u00e0y, th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y tr\u00ean Gi\u1ea5y ch\u1ee9ng nh\u1eadn th\u1eed nghi\u1ec7m v\u1eadt li\u1ec7u (MTC) ho\u1eb7c B\u00e1o c\u00e1o th\u1eed nghi\u1ec7m nh\u00e0 m\u00e1y (MTR), kh\u00f4ng ch\u1ec9 l\u00e0 c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u; ch\u00fang l\u00e0 ng\u00f4n ng\u1eef c\u1ee7a hi\u1ec7u su\u1ea5t. Ch\u00fang cho bi\u1ebft c\u00e1ch th\u00e9p s\u1ebd ph\u1ea3n \u1ee9ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng, c\u00e1ch n\u00f3 u\u1ed1n cong v\u00e0 khi n\u00e0o n\u00f3 s\u1ebd h\u1ecfng. Hi\u1ec3u r\u00f5 c\u00e1c ph\u00e9p \u0111o n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 thi\u1ebft k\u1ebf an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3. C\u00e1c thu\u1ed9c t\u00ednh n\u00e0y \u0111\u01b0\u1ee3c \u0111o theo c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf c\u00f4ng nh\u1eadn, ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 ASTM A276 (Ti\u00eau chu\u1ea9n cho Th\u00e9p tr\u00f2n v\u00e0 h\u00ecnh d\u1ea1ng th\u00e9p kh\u00f4ng g\u1ec9) v\u00e0 ASTM A479 (cho \u1ee9ng d\u1ee5ng n\u1ed3i h\u01a1i v\u00e0 b\u00ecnh ch\u1ecbu \u00e1p l\u1ef1c).<\/p>\n<h3>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/h3>\n<p>\u0110\u1ed9 b\u1ec1n k\u00e9o \u0111o l\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00e9o \u0111\u1ee9t c\u1ee7a v\u1eadt li\u1ec7u. N\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng th\u1eed nghi\u1ec7m k\u00e9o, trong \u0111\u00f3 m\u1eabu th\u00e9p tr\u00f2n \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i cho \u0111\u1ebfn khi g\u00e3y. Hai gi\u00e1 tr\u1ecb ch\u00ednh xu\u1ea5t ph\u00e1t t\u1eeb th\u1eed nghi\u1ec7m n\u00e0y:<\/p>\n<ul>\n<li>L\u1ef1c ch\u1ecbu gi\u1edbi h\u1ea1n ch\u1ea3y (0.2% Offset): \u0110\u00e2y l\u00e0 m\u1ee9c \u1ee9ng su\u1ea5t t\u1ea1i \u0111\u00f3 v\u1eadt li\u1ec7u b\u1eaft \u0111\u1ea7u bi\u1ebfn d\u1ea1ng v\u0129nh vi\u1ec5n, ngh\u0129a l\u00e0 sau khi b\u1ecf t\u1ea3i, n\u00f3 s\u1ebd kh\u00f4ng tr\u1edf l\u1ea1i h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac v\u00e0 c\u01a1 kh\u00ed, l\u1ef1c ch\u1ecbu gi\u1edbi h\u1ea1n ch\u1ea3y l\u00e0 tham s\u1ed1 quan tr\u1ecdng nh\u1ea5t. C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c \u1ee9ng su\u1ea5t an to\u00e0n th\u1ea5p h\u01a1n gi\u1edbi h\u1ea1n ch\u1ea3y \u0111\u1ec3 tr\u00e1nh u\u1ed1n cong v\u0129nh vi\u1ec5n.<\/li>\n<li>L\u1ef1c k\u00e9o \u0111\u1ee9t t\u1ed1i \u0111a (UTS): \u0110\u00e2y l\u00e0 m\u1ee9c \u1ee9ng su\u1ea5t t\u1ed1i \u0111a m\u00e0 v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng khi b\u1ecb k\u00e9o ho\u1eb7c k\u00e9o d\u00e0i tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u b\u1ecb h\u1eb9p c\u1ed5 v\u00e0 cu\u1ed1i c\u00f9ng g\u00e3y. Trong khi UTS cho bi\u1ebft <a href=\"https:\/\/productionscrews.com\/vi\/ultimate-guide-alloy-steel-screws-raw-material-selection-for-maximum-strength\/\"  data-wpil-monitor-id=\"360\" target=\"_blank\">c\u01b0\u1eddng \u0111\u1ed9 t\u1ed1i \u0111a tuy\u1ec7t \u0111\u1ed1i c\u1ee7a v\u1eadt li\u1ec7u<\/a>, vi\u1ec7c thi\u1ebft k\u1ebf g\u1ea7n gi\u1edbi h\u1ea1n n\u00e0y l\u00e0 r\u1ee7i ro v\u00ec ph\u1ea7n \u0111\u00e3 tr\u1ea3i qua u\u1ed1n cong \u0111\u00e1ng k\u1ec3, v\u0129nh vi\u1ec5n.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-826831.jpg\" height=\"853\" width=\"1280\" class=\"alignnone size-full wp-image-2448\" alt=\"L\u01b0\u1edbi th\u00e9p d\u00f9ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p \u0111\u1ec3 gia c\u1ed1 v\u00e0 m\u1ee5c \u0111\u00edch x\u00e2y d\u1ef1ng.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-826831.jpg 1280w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-826831-300x200.jpg 300w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-826831-768x512.jpg 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2025\/09\/pixabay-826831-18x12.jpg 18w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/> <\/p>\n<h3>Kh\u1ea3 n\u0103ng u\u1ed1n cong<\/h3>\n<p>Kh\u1ea3 n\u0103ng u\u1ed1n cong l\u00e0 th\u01b0\u1edbc \u0111o kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u ch\u1ecbu \u0111\u1ef1ng u\u1ed1n cong v\u0129nh vi\u1ec5n \u0111\u00e1ng k\u1ec3 tr\u01b0\u1edbc khi g\u00e3y. \u0110\u00e2y l\u00e0 \u0111\u1eb7c t\u00ednh cho ph\u00e9p m\u1ed9t thanh \u0111\u01b0\u1ee3c u\u1ed1n, t\u1ea1o h\u00ecnh ho\u1eb7c k\u00e9o th\u00e0nh h\u00ecnh d\u1ea1ng m\u1edbi m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y. Trong th\u1eed nghi\u1ec7m k\u00e9o, kh\u1ea3 n\u0103ng u\u1ed1n cong \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng hai c\u00e1ch ch\u00ednh:<\/p>\n<ul>\n<li>D\u00e3n d\u00e0i: \u0110\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng ph\u1ea7n tr\u0103m, \u0111\u00e2y l\u00e0 th\u01b0\u1edbc \u0111o m\u1ee9c \u0111\u1ed9 k\u00e9o d\u00e0i c\u1ee7a m\u1eabu so v\u1edbi chi\u1ec1u d\u00e0i ban \u0111\u1ea7u tr\u01b0\u1edbc khi g\u00e3y. Ph\u1ea7n tr\u0103m cao h\u01a1n cho th\u1ea5y kh\u1ea3 n\u0103ng u\u1ed1n cong l\u1edbn h\u01a1n.<\/li>\n<li>Gi\u1ea3m di\u1ec7n t\u00edch: C\u0169ng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng ph\u1ea7n tr\u0103m, \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a thanh t\u1ea1i \u0111i\u1ec3m g\u00e3y.<\/li>\n<\/ul>\n<p>Kh\u1ea3 n\u0103ng u\u1ed1n cao r\u1ea5t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn gia c\u00f4ng ngu\u1ed9i (nh\u01b0 u\u1ed1n th\u00e9p rebar) v\u00e0 cho c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea7n h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng va \u0111\u1eadp b\u1eb1ng c\u00e1ch u\u1ed1n cong thay v\u00ec v\u1ee1 v\u1ee5n.<\/p>\n<h3>\u0110\u1ed9 c\u1ee9ng<\/h3>\n<p>\u0110\u1ed9 c\u1ee9ng l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u ch\u1ed1ng l\u1ea1i u\u1ed1n cong v\u0129nh vi\u1ec5n c\u1ee5c b\u1ed9, nh\u01b0 tr\u1ea7y x\u01b0\u1edbc, m\u00e0i m\u00f2n ho\u1eb7c m\u00f3p. \u0110\u00e2y l\u00e0 ch\u1ec9 s\u1ed1 ch\u00ednh v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n. M\u1ed9t v\u1eadt li\u1ec7u c\u1ee9ng h\u01a1n kh\u00f3 gia c\u00f4ng h\u01a1n nh\u01b0ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu ma s\u00e1t ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi c\u00e1c b\u1ec1 m\u1eb7t kh\u00e1c. \u0110\u1ed9 c\u1ee9ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng c\u00e1c th\u1eed nghi\u1ec7m \u1ea5n l\u00f5m, v\u1edbi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c b\u00e1o tr\u00ean c\u00e1c thang nh\u01b0 Rockwell (HRC ho\u1eb7c HRB) ho\u1eb7c Brinell (HBW). \u0110\u1ed9 c\u1ee9ng c\u1ee7a thanh th\u00e9p kh\u00f4ng g\u1ec9 ph\u1ee5 thu\u1ed9c tr\u1ef1c ti\u1ebfp v\u00e0o h\u00e0m l\u01b0\u1ee3ng carbon v\u00e0 vi\u1ec7c n\u00f3 \u0111\u00e3 qua qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng b\u1eb1ng gia c\u00f4ng ngu\u1ed9i (k\u00e9o ngu\u1ed9i) ho\u1eb7c nhi\u1ec7t luy\u1ec7n (trong tr\u01b0\u1eddng h\u1ee3p c\u00e1c lo\u1ea1i martensitic).<\/p>\n<h3>Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp<\/h3>\n<p>Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp, hay \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp, l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng v\u00e0 u\u1ed1n cong v\u0129nh vi\u1ec5n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ea3i tr\u1ecdng \u0111\u1ed9t ng\u1ed9t, t\u1ed1c \u0111\u1ed9 cao (m\u1ed9t va ch\u1ea1m). N\u00f3 kh\u00e1c v\u1edbi \u0111\u1ed9 b\u1ec1n. M\u1ed9t v\u1eadt li\u1ec7u r\u1ea5t ch\u1eafc ch\u1eafn c\u00f3 th\u1ec3 d\u1ec5 v\u1ee1, ngh\u0129a l\u00e0 s\u1ebd g\u00e3y m\u00e0 \u00edt ho\u1eb7c kh\u00f4ng u\u1ed1n cong khi b\u1ecb t\u00e1c \u0111\u1ed9ng. \u0110\u1ed9 b\u1ec1n va \u0111\u1eadp \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng l\u1ea1nh, v\u00ec nhi\u1ec1u v\u1eadt li\u1ec7u tr\u1edf n\u00ean gi\u00f2n h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Th\u1eed nghi\u1ec7m ti\u00eau chu\u1ea9n cho kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp l\u00e0 th\u1eed nghi\u1ec7m Charpy V-notch. M\u1ed9t m\u1eabu nh\u1ecf c\u00f3 r\u00e3nh \u0111\u01b0\u1ee3c \u0111\u00e1nh \u0111\u1eadp b\u1eb1ng m\u1ed9t con l\u1eafc c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng, v\u00e0 n\u0103ng l\u01b0\u1ee3ng h\u1ea5p th\u1ee5 trong qu\u00e1 tr\u00ecnh g\u00e3y c\u1ee7a m\u1eabu \u0111\u01b0\u1ee3c \u0111o. Gi\u00e1 tr\u1ecb n\u0103ng l\u01b0\u1ee3ng h\u1ea5p th\u1ee5 cao h\u01a1n cho th\u1ea5y \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp l\u1edbn h\u01a1n. Th\u00e9p kh\u00f4ng g\u1ec9 austenitic nh\u01b0 304 v\u00e0 316 n\u1ed5i ti\u1ebfng v\u1edbi \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp tuy\u1ec7t v\u1eddi, ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 r\u1ea5t th\u1ea5p.<\/p>\n<h2>Hi\u1ec3u v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ec9 s\u00e9t<\/h2>\n<p>L\u00fd do ch\u00ednh \u0111\u1ec3 ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 l\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ec9 s\u00e9t c\u1ee7a n\u00f3. Tuy nhi\u00ean, n\u00f3i r\u1eb1ng \u201cth\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng b\u1ecb r\u1ec9\u201d l\u00e0 m\u1ed9t c\u00e1ch n\u00f3i qu\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 nguy hi\u1ec3m. T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb \u0103n m\u00f2n trong \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh. Th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt th\u1ef1c s\u1ef1 l\u00e0 hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i \u0103n m\u00f2n c\u1ee5 th\u1ec3 v\u00e0 ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ed1ng l\u1ea1i ch\u00fang trong m\u00f4i tr\u01b0\u1eddng d\u1ecbch v\u1ee5 d\u1ef1 \u0111\u1ecbnh. Th\u01b0\u1eddng th\u1ea5t b\u1ea1i kh\u00f4ng ph\u1ea3i do m\u1ecfng \u0111\u1ec1u, m\u00e0 do c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee5c b\u1ed9 tinh vi c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c nhanh ch\u00f3ng v\u00e0 b\u1ea5t ng\u1edd c\u1ee7a th\u00e0nh ph\u1ea7n.<\/p>\n<h3>Ngo\u00e0i \u0103n m\u00f2n t\u1ed5ng th\u1ec3<\/h3>\n<p>\u0102n m\u00f2n t\u1ed5ng th\u1ec3, hay \u0103n m\u00f2n \u0111\u1ec1u, l\u00e0 qu\u00e1 tr\u00ecnh kh\u00e1 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, trong \u0111\u00f3 to\u00e0n b\u1ed9 b\u1ec1 m\u1eb7t th\u00e9p b\u1ecb \u0103n m\u00f2n v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm, \u0111\u1ec1u. \u0110i\u1ec1u n\u00e0y \u00edt g\u00e2y lo ng\u1ea1i \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 trong m\u00f4i tr\u01b0\u1eddng \u0111i\u1ec3n h\u00ecnh. Nguy c\u01a1 l\u1edbn h\u01a1n nhi\u1ec1u \u0111\u1ebfn t\u1eeb \u0103n m\u00f2n c\u1ee5c b\u1ed9, t\u1ea5n c\u00f4ng v\u1eadt li\u1ec7u t\u1ea1i c\u00e1c \u0111i\u1ec3m c\u1ee5 th\u1ec3, th\u01b0\u1eddng v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n.<\/p>\n<h3>\u0102n m\u00f2n \u0103n m\u00f2n r\u1ed7<\/h3>\n<p>\u0102n m\u00f2n r\u1ed7 l\u00e0 d\u1ea1ng \u0103n m\u00f2n c\u1ee5c b\u1ed9 cao, d\u1eabn \u0111\u1ebfn vi\u1ec7c t\u1ea1o ra c\u00e1c l\u1ed7 nh\u1ecf, ho\u1eb7c \u201cl\u1ed7 r\u1ed7\u201d, tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ea1ng \u0103n m\u00f2n ph\u00e1 h\u1ee7y nh\u1ea5t v\u00e0 c\u00f3 th\u1ec3 kh\u00f3 ph\u00e1t hi\u1ec7n tr\u01b0\u1edbc khi g\u00e2y ra c\u00e1c l\u1ed7 ho\u00e0n to\u00e0n xuy\u00ean qua v\u1eadt li\u1ec7u. Th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u do c\u00e1c ion chloride (Cl\u207b), ph\u1ed5 bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, mu\u1ed1i ch\u1ed1ng \u0111\u00f3ng b\u0103ng v\u00e0 m\u1ed9t s\u1ed1 h\u00f3a ch\u1ea5t c\u00f4ng nghi\u1ec7p. C\u00e1c ion n\u00e0y c\u00f3 th\u1ec3 ph\u00e1 v\u1ee1 l\u1edbp th\u1ee5 \u0111\u1ed9ng t\u1ea1i ch\u1ed7, t\u1ea1o ra m\u1ed9t m\u00f4i tr\u01b0\u1eddng vi m\u00f4 t\u1ea5n c\u00f4ng, t\u1ef1 duy tr\u00ec trong l\u1ed7 r\u1ed7. Molypden l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ed7. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao Lo\u1ea1i 316, v\u1edbi h\u00e0m l\u01b0\u1ee3ng molypden t\u1eeb 2-3TP3T, v\u01b0\u1ee3t tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi Lo\u1ea1i 304 trong b\u1ea5t k\u1ef3 m\u00f4i tr\u01b0\u1eddng ch\u1ee9a chloride n\u00e0o.<\/p>\n<h3>\u0102n m\u00f2n khe<\/h3>\n<p>\u0102n m\u00f2n khe l\u00e0 d\u1ea1ng t\u1ea5n c\u00f4ng c\u1ee5c b\u1ed9 kh\u00e1c x\u1ea3y ra trong c\u00e1c m\u00f4i tr\u01b0\u1eddng vi m\u00f4 tr\u00ec tr\u1ec7, ho\u1eb7c khe h\u1edf. Nh\u1eefng n\u01a1i n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y d\u01b0\u1edbi <a href=\"https:\/\/productionscrews.com\/vi\/cylindrical-head-bolts\/\"  data-wpil-monitor-id=\"368\" target=\"_blank\">\u0111\u1ea7u bu l\u00f4ng<\/a>, b\u00ean d\u01b0\u1edbi mi\u1ebfng \u0111\u1ec7m, trong c\u00e1c m\u1ed1i gh\u00e9p ch\u1ed3ng ho\u1eb7c b\u1ea5t k\u1ef3 khe h\u1edf ch\u1eb7t n\u00e0o n\u01a1i d\u00f2ng ch\u1ea3y t\u1ef1 do c\u1ee7a oxy b\u1ecb h\u1ea1n ch\u1ebf. B\u00ean trong khe h\u1edf, oxy b\u1ecb ti\u00eau th\u1ee5, ng\u0103n ch\u1eb7n l\u1edbp th\u1ee5 \u0111\u1ed9ng t\u1ef1 ph\u1ee5c h\u1ed3i. V\u00f9ng thi\u1ebfu oxy n\u00e0y tr\u1edf th\u00e0nh c\u1ef1c d\u01b0\u01a1ng, trong khi b\u1ec1 m\u1eb7t xung quanh, gi\u00e0u oxy tr\u1edf th\u00e0nh c\u1ef1c \u00e2m, t\u1ea1o th\u00e0nh t\u1ebf b\u00e0o \u0103n m\u00f2n t\u1ea5n c\u00f4ng d\u1eef d\u1ed9i kim lo\u1ea1i trong khe h\u1edf. Gi\u1ed1ng nh\u01b0 \u0103n m\u00f2n r\u1ed7, \u0103n m\u00f2n khe h\u1edf c\u00e0ng tr\u1edf n\u00ean t\u1ed3i t\u1ec7 h\u01a1n b\u1edfi chlorides v\u00e0 \u0111\u01b0\u1ee3c ch\u1ed1ng l\u1ea1i t\u1ed1t nh\u1ea5t b\u1edfi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ee9a molybdenum, nh\u01b0 316L ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9 duplex.<\/p>\n<h3>N\u1ee9t n\u1ebb do \u0103n m\u00f2n do \u1ee9ng su\u1ea5t<\/h3>\n<p>N\u1ee9t n\u1ebb do \u0103n m\u00f2n do \u1ee9ng su\u1ea5t (SCC) l\u00e0 m\u1ed9t d\u1ea1ng h\u1ecfng h\u00f3c \u0111\u1eb7c bi\u1ec7t nguy hi\u1ec3m v\u00ec n\u00f3 c\u00f3 th\u1ec3 x\u1ea3y ra m\u00e0 \u00edt ho\u1eb7c kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng c\u1ee7a \u0103n m\u00f2n chung. N\u00f3 x\u1ea3y ra do s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a ba y\u1ebfu t\u1ed1: v\u1eadt li\u1ec7u d\u1ec5 b\u1ecb \u0103n m\u00f2n, m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n \u0111\u1eb7c tr\u01b0ng v\u00e0 \u1ee9ng su\u1ea5t k\u00e9o (c\u00f3 th\u1ec3 l\u00e0 t\u1ea3i tr\u1ecdng t\u00e1c d\u1ee5ng ho\u1eb7c \u1ee9ng su\u1ea5t c\u00f2n l\u1ea1i t\u1eeb qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t). \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 austenitic ph\u1ed5 bi\u1ebfn (lo\u1ea1i 300), m\u00f4i tr\u01b0\u1eddng \u0111i\u1ec3n h\u00ecnh cho SCC l\u00e0 ch\u1ee9a chloride n\u00f3ng (th\u01b0\u1eddng tr\u00ean 60\u00b0C ho\u1eb7c 140\u00b0F). C\u00e1c v\u1ebft n\u1ee9t c\u00f3 th\u1ec3 lan r\u1ed9ng nhanh ch\u00f3ng qua v\u1eadt li\u1ec7u, d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c \u0111\u1ed9t ng\u1ed9t, th\u1ea3m kh\u1ed1c c\u1ee7a b\u1ed9 ph\u1eadn. Khi SCC l\u00e0 r\u1ee7i ro \u0111\u00e3 bi\u1ebft, c\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 duplex (nh\u01b0 2205) ho\u1eb7c h\u1ee3p kim niken cao, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n<h2>H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn<\/h2>\n<p>L\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t c\u1ee7a m\u1ed9t thanh th\u00e9p kh\u00f4ng g\u1ec9 hi\u1ebfm khi l\u00e0 ph\u01b0\u01a1ng \u00e1n \u0111\u1eaft nh\u1ea5t ho\u1eb7c h\u1ee3p kim cao nh\u1ea5t. \u0110\u00f3 l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng c\u1ea9n th\u1eadn gi\u1eefa hi\u1ec7u su\u1ea5t k\u1ef9 thu\u1eadt, ti\u1ebfp x\u00fac m\u00f4i tr\u01b0\u1eddng, d\u1ec5 ch\u1ebf t\u1ea1o v\u00e0 t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi. K\u1ebft h\u1ee3p c\u00e1c nguy\u00ean t\u1eafc h\u00f3a h\u1ecdc, s\u1ea3n xu\u1ea5t v\u00e0 c\u01a1 kh\u00ed \u0111\u00e3 th\u1ea3o lu\u1eadn, ch\u00fang ta c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t <a href=\"https:\/\/productionscrews.com\/vi\/essential-guide-to-high-strength-bolts-application-from-theory-to-practice\/\"  data-wpil-monitor-id=\"369\" target=\"_blank\">khung th\u1ef1c t\u1ebf \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn qu\u00e1 tr\u00ecnh l\u1ef1a ch\u1ecdn cho c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/a>. H\u01b0\u1edbng d\u1eabn n\u00e0y l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt.<\/p>\n<h3>B\u1ea3ng 3: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng<\/h3>\n<p>B\u1ea3ng n\u00e0y li\u00ean k\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t, cung c\u1ea5p l\u00fd do k\u1ef9 thu\u1eadt \u0111\u1eb1ng sau m\u1ed7i l\u1ef1a ch\u1ecdn.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"144\">\u1ee8ng d\u1ee5ng\/M\u00f4i tr\u01b0\u1eddng<\/td>\n<td width=\"144\">Th\u00e1ch th\u1ee9c ch\u00ednh<\/td>\n<td width=\"144\">Lo\u1ea1i ph\u00f9 h\u1ee3p \u0111\u1ec1 xu\u1ea5t<\/td>\n<td width=\"144\">L\u00fd do k\u1ef9 thu\u1eadt (T\u1ea1i sao?)<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">Ki\u1ebfn tr\u00fac chung &amp; C\u1ea5u tr\u00fac<\/td>\n<td width=\"144\">Ngo\u1ea1i h\u00ecnh, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n kh\u00ed quy\u1ec3n, chi ph\u00ed<\/td>\n<td width=\"144\">304 \/ 304L<\/td>\n<td width=\"144\">Lo\u1ea1i th\u00e9p ph\u1ed5 bi\u1ebfn. Cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi trong h\u1ea7u h\u1ebft c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00ed quy\u1ec3n. Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 d\u1ec5 d\u00e0ng c\u00f3 s\u1eb5n. 304L \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh cho c\u00e1c c\u1ea5u tr\u00fac h\u00e0n.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">X\u1eed l\u00fd th\u1ef1c ph\u1ea9m &amp; \u0110\u1ed3 u\u1ed1ng<\/td>\n<td width=\"144\">V\u1ec7 sinh, kh\u1ea3 n\u0103ng l\u00e0m s\u1ea1ch, ch\u1ed1ng l\u1ea1i c\u00e1c ch\u1ea5t t\u1ea9y r\u1eeda di\u1ec7t khu\u1ea9n<\/td>\n<td width=\"144\">304 \/ 304L, 316\/316L<\/td>\n<td width=\"144\">304L \u0111\u1ee7 cho h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng. 316L c\u1ea7n thi\u1ebft khi s\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t t\u1ea9y r\u1eeda m\u1ea1nh h\u01a1n ho\u1eb7c c\u00e1c s\u1ea3n ph\u1ea9m m\u1eb7n\/n\u01b0\u1edbc mu\u1ed1i, \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n r\u1ed7.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">Ph\u1ea7n c\u1ee9ng h\u00e0ng h\u1ea3i &amp; C\u1ea5u tr\u00fac ven bi\u1ec3n<\/td>\n<td width=\"144\">Phun n\u01b0\u1edbc mu\u1ed1i, n\u1ed3ng \u0111\u1ed9 clo cao<\/td>\n<td width=\"144\">316 \/ 316L, 2205<\/td>\n<td width=\"144\">316L l\u00e0 ti\u00eau chu\u1ea9n t\u1ed1i thi\u1ec3u cho m\u00f4i tr\u01b0\u1eddng h\u00e0ng h\u1ea3i do h\u00e0m l\u01b0\u1ee3ng molybdenum ch\u1ed1ng \u0103n m\u00f2n clo r\u1ed7. Duplex 2205 cung c\u1ea5p \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n t\u1ea1o th\u00e0nh (SCC) c\u00f2n t\u1ed1t h\u01a1n.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">Tr\u1ee5c b\u01a1m &amp; B\u1ed9 ph\u1eadn van<\/td>\n<td width=\"144\">\u0110\u1ed9 b\u1ec1n, ch\u1ed1ng m\u00e0i m\u00f2n, ch\u00ednh x\u00e1c, ch\u1ed1ng \u0103n m\u00f2n<\/td>\n<td width=\"144\">316\/316L gia c\u00f4ng ngu\u1ed9i, 410 (T\u00f4i c\u1ee9ng), 17-4 PH<\/td>\n<td width=\"144\">316L gia c\u00f4ng ngu\u1ed9i cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ed1t. 410 t\u00f4i c\u1ee9ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n xu\u1ea5t s\u1eafc nh\u01b0ng \u0111\u1ed9 ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n. 17-4 PH cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p tuy\u1ec7t v\u1eddi gi\u1eefa \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">Ph\u1ea7n l\u00f2 nung nhi\u1ec7t \u0111\u1ed9 cao<\/td>\n<td width=\"144\">Kh\u00e1ng oxy h\u00f3a, \u0111\u1ed9 b\u1ec1n nhi\u1ec7t cao (ch\u1ea3y r\u1ec7)<\/td>\n<td width=\"144\">310S, 309S<\/td>\n<td width=\"144\">C\u00e1c lo\u1ea1i n\u00e0y c\u00f3 h\u00e0m l\u01b0\u1ee3ng cr\u00f4m v\u00e0 niken cao, t\u1ea1o th\u00e0nh l\u1edbp v\u1ea3y b\u00e1m ch\u1eafc ch\u1eafn ch\u1ed1ng oxy h\u00f3a v\u00e0 cung c\u1ea5p \u0111\u1ed9 b\u1ec1n t\u1ed1t \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/td>\n<\/tr>\n<tr>\n<td width=\"144\">Nh\u00e0 m\u00e1y x\u1eed l\u00fd h\u00f3a ch\u1ea5t<\/td>\n<td width=\"144\">Kh\u00e1ng c\u00e1c lo\u1ea1i h\u00f3a ch\u1ea5t v\u00e0 axit \u0111\u1eb7c th\u00f9, m\u1ea1nh m\u1ebd<\/td>\n<td width=\"144\">2205, Duplex si\u00eau, H\u1ee3p kim Niken<\/td>\n<td width=\"144\">L\u1ef1a ch\u1ecdn ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o lo\u1ea1i h\u00f3a ch\u1ea5t, n\u1ed3ng \u0111\u1ed9 v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee5 th\u1ec3. C\u00e1c lo\u1ea1i Duplex cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed9ng. \u0110\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng m\u1ea1nh nh\u1ea5t, c\u1ea7n h\u1ee3p kim niken cao.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>K\u1ebft lu\u1eadn: \u00c1p d\u1ee5ng ki\u1ebfn th\u1ee9c v\u00e0o th\u1ef1c ti\u1ec5n<\/h3>\n<p>Ch\u00fang t\u00f4i \u0111\u00e3 \u0111i t\u1eeb h\u00f3a h\u1ecdc c\u01a1 b\u1ea3n l\u00e0m cho th\u00e9p tr\u1edf th\u00e0nh \u201ckh\u00f4ng g\u1ec9\u201d \u0111\u1ebfn c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1ecbnh h\u00ecnh v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a thanh th\u00e9p, v\u00e0 qua c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi c\u1ee7a n\u00f3 d\u01b0\u1edbi t\u1ea3i tr\u1ecdng. Ch\u00fang t\u00f4i \u0111\u00e3 ph\u00e2n t\u00edch c\u00e1ch v\u00e0 l\u00fd do n\u00f3 b\u1ecb h\u1ecfng v\u00e0 cu\u1ed1i c\u00f9ng, k\u1ebft h\u1ee3p ki\u1ebfn th\u1ee9c n\u00e0y th\u00e0nh m\u1ed9t khung l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf. Ph\u00e2n t\u00edch to\u00e0n di\u1ec7n n\u00e0y nh\u1ea5n m\u1ea1nh nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i: m\u1ed9t thanh th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t h\u00e0ng h\u00f3a \u0111\u01a1n gi\u1ea3n. N\u00f3 l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf k\u1ef9 l\u01b0\u1ee1ng, hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 ph\u1ee5 thu\u1ed9c tr\u1ef1c ti\u1ebfp v\u00e0o hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 \u0111\u1eb7c t\u00ednh k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3. Ph\u00e2n t\u00edch k\u1ef9 l\u01b0\u1ee1ng l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 khai th\u00e1c t\u1ed1i \u0111a ti\u1ec1m n\u0103ng c\u1ee7a n\u00f3, \u0111\u1ea3m b\u1ea3o an to\u00e0n, tu\u1ed5i th\u1ecd v\u00e0 th\u00e0nh c\u00f4ng v\u1eadn h\u00e0nh c\u1ee7a b\u1ea5t k\u1ef3 d\u1ef1 \u00e1n n\u00e0o s\u1eed d\u1ee5ng n\u00f3.<\/p>\n<ul>\n<li class=\"whitespace-normal break-words\"><strong>Th\u00e9p kh\u00f4ng g\u1ec9 \u2013 Wikipedia<\/strong> <a class=\"underline\" href=\"https:\/\/en.wikipedia.org\/wiki\/Stainless_steel\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Stainless_steel<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>SSINA \u2013 Ng\u00e0nh C\u00f4ng Nghi\u1ec7p Th\u00e9p Chuy\u00ean D\u1ee5ng B\u1eafc M\u1ef9<\/strong> <a class=\"underline\" href=\"https:\/\/www.ssina.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.ssina.com\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Vi\u1ec7n K\u1ef9 thu\u1eadt Th\u00e9p M\u1ef9 (AISC)<\/strong> <a class=\"underline\" href=\"https:\/\/www.aisc.org\/technical-resources\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.aisc.org\/technical-resources\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Hi\u1ec7p H\u1ed9i Th\u00e9p Kh\u00f4ng G\u1ec9 To\u00e0n C\u1ea7u<\/strong> <a class=\"underline\" href=\"https:\/\/worldstainless.org\" target=\"_blank\" rel=\"noopener\">https:\/\/worldstainless.org<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>ASTM Qu\u1ed1c T\u1ebf \u2013 C\u1eeda H\u00e0ng Ti\u00eau Chu\u1ea9n<\/strong> <a class=\"underline\" href=\"https:\/\/store.astm.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/store.astm.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Hi\u1ec7p H\u1ed9i Th\u00e9p Kh\u00f4ng G\u1ec9 Anh (BSSA)<\/strong> <a class=\"underline\" href=\"https:\/\/bssa.org.uk\/\" target=\"_blank\" rel=\"noopener\">https:\/\/bssa.org.uk\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Vi\u1ec7n Nickel<\/strong> <a class=\"underline\" href=\"https:\/\/nickelinstitute.org\/\" target=\"_blank\" rel=\"noopener\">https:\/\/nickelinstitute.org\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Outokumpu \u2013 C\u00e1c Lo\u1ea1i Th\u00e9p Kh\u00f4ng G\u1ec9<\/strong> <a class=\"underline\" href=\"https:\/\/www.outokumpu.com\/en\/products\/stainless-steel-types\" target=\"_blank\" rel=\"noopener\">https:\/\/www.outokumpu.com\/en\/products\/stainless-steel-types<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>Total Materia<\/strong> <a class=\"underline\" href=\"https:\/\/www.totalmateria.com\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.totalmateria.com\/<\/a><\/li>\n<li class=\"whitespace-normal break-words\"><strong>\u0110\u1ed9i Ng\u0169 Th\u00e9p Kh\u00f4ng G\u1ec9<\/strong> <a class=\"underline\" href=\"https:\/\/www.teamstainless.org\/resources\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.teamstainless.org\/resources\/<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Introduction: What You Need to Know A stainless steel bar is a solid, long piece of stainless steel that comes in different shapes like round, square, hexagonal, or flat. While this sounds simple, choosing the right stainless steel bar requires careful thinking. Picking the wrong type isn&#8217;t just a small mistake &#8211; it can cause [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2449,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2447","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\/2447","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=2447"}],"version-history":[{"count":3,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2447\/revisions"}],"predecessor-version":[{"id":2862,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/posts\/2447\/revisions\/2862"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/2449"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=2447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/categories?post=2447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/tags?post=2447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}