{"id":1463,"date":"2025-12-23T00:33:53","date_gmt":"2025-12-22T17:33:53","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/phan-biet-inox-qua-tia-lua-mai-nhan-biet-304-201-430-410\/"},"modified":"2025-12-23T00:33:53","modified_gmt":"2025-12-22T17:33:53","slug":"phan-biet-inox-qua-tia-lua-mai-nhan-biet-304-201-430-410","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/phan-biet-inox-qua-tia-lua-mai-nhan-biet-304-201-430-410\/","title":{"rendered":"Ph\u00e2n bi\u1ec7t inox qua tia l\u1eeda m\u00e0i: nh\u1eadn bi\u1ebft 304, 201, 430, 410"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-nguyen-ly-vi-sao-tia-lua-mai-noi-that-ve-vat-lieu\">Nguy\u00ean l\u00fd: V\u00ec sao tia l\u1eeda m\u00e0i \u201cn\u00f3i th\u1eadt\u201d v\u1ec1 v\u1eadt li\u1ec7u?<\/a><\/li>\n<li><a href=\"#toc-1-dung-cu-va-an-toan\">D\u1ee5ng c\u1ee5 v\u00e0 an to\u00e0n<\/a><\/li>\n<li><a href=\"#toc-2-quy-trinh-5-buoc-quan-sat-tia-lua-mai\">Quy tr\u00ecnh 5 b\u01b0\u1edbc quan s\u00e1t tia l\u1eeda m\u00e0i<\/a><\/li>\n<li><a href=\"#toc-3-nhan-dien-mau-tia-lua-theo-nhom-inox-va-vat-lieu-l\">Nh\u1eadn di\u1ec7n m\u1eabu tia l\u1eeda theo nh\u00f3m inox v\u00e0 v\u1eadt li\u1ec7u li\u00ean quan<\/a><\/li>\n<li><a href=\"#toc-4-so-do-quyet-dinh-nhanh-khi-nhin-tia-lua-mai\">S\u01a1 \u0111\u1ed3 quy\u1ebft \u0111\u1ecbnh nhanh khi nh\u00ecn tia l\u1eeda m\u00e0i<\/a><\/li>\n<li><a href=\"#toc-5-nguon-sai-so-pho-bien-va-cach-khac-phuc\">Ngu\u1ed3n sai s\u1ed1 ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a><\/li>\n<li><a href=\"#toc-6-khi-nao-khong-nen-chi-dua-vao-tia-lua-mai\">Khi n\u00e0o KH\u00d4NG n\u00ean ch\u1ec9 d\u1ef1a v\u00e0o tia l\u1eeda m\u00e0i?<\/a><\/li>\n<li><a href=\"#toc-7-phuong-phap-bo-sung-de-tang-do-chac-chan\">Ph\u01b0\u01a1ng ph\u00e1p b\u1ed5 sung \u0111\u1ec3 t\u0103ng \u0111\u1ed9 ch\u1eafc ch\u1eafn<\/a><\/li>\n<li><a href=\"#toc-8-mot-vi-du-thuc-te-tai-xuong\">M\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/a><\/li>\n<li><a href=\"#toc-9-checklist-nhanh-cho-tho-co-khi\">Checklist nhanh cho th\u1ee3 c\u01a1 kh\u00ed<\/a><\/li>\n<li><a href=\"#toc-10-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong ki\u1ec3m \u0111\u1ecbnh v\u1eadt li\u1ec7u t\u1ea1i x\u01b0\u1edfng, ph\u00e2n bi\u1ec7t c\u00e1c lo\u1ea1i inox qua tia l\u1eeda m\u00e0i l\u00e0 k\u1ef9 n\u0103ng nhanh, r\u1ebb, v\u00e0 h\u1eefu \u00edch khi c\u1ea7n s\u00e0ng l\u1ecdc ban \u0111\u1ea7u. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p h\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh d\u00e0nh cho th\u1ee3 c\u01a1 kh\u00ed, gi\u00fap nh\u1eadn di\u1ec7n ph\u1ed5 bi\u1ebfn c\u00e1c nh\u00f3m inox (austenitic 304\/201\/316, ferritic 430, martensitic 410\/420, duplex 2205, 17-4PH) b\u1eb1ng tia l\u1eeda m\u00e0i, k\u00e8m l\u01b0u \u00fd an to\u00e0n, ngu\u1ed3n sai s\u1ed1, v\u00e0 c\u00e1ch ki\u1ec3m ch\u1ee9ng. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong t\u1ed5ng th\u1ec3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n bi\u1ec7t v\u00e0 ki\u1ec3m \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng inox ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n<h2 id=\"toc-0-nguyen-ly-vi-sao-tia-lua-mai-noi-that-ve-vat-lieu\">Nguy\u00ean l\u00fd: V\u00ec sao tia l\u1eeda m\u00e0i \u201cn\u00f3i th\u1eadt\u201d v\u1ec1 v\u1eadt li\u1ec7u?<\/h2>\n<p>&#8211; Tia l\u1eeda m\u00e0i l\u00e0 c\u00e1c h\u1ea1t kim lo\u1ea1i nung n\u00f3ng b\u1eafn ra khi ma s\u00e1t v\u1edbi \u0111\u00e1 m\u00e0i; m\u00e0u s\u1eafc, m\u1eadt \u0111\u1ed9, \u0111\u1ed9 d\u00e0i v\u00e0 ki\u1ec3u \u201cn\u1ed5 sao\u201d ph\u1ee5 thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 h\u00e0m l\u01b0\u1ee3ng carbon c\u1ee7a th\u00e9p\/inox.<br \/>\n&#8211; C\u00e0ng nhi\u1ec1u carbon v\u00e0 t\u1ea1p h\u1ee3p nguy\u00ean t\u1ed1 t\u1ea1o cacbit\/\u00f4xit d\u1ec5 ch\u00e1y, tia c\u00e0ng s\u00e1ng, d\u00e0i, ph\u00e2n nh\u00e1nh m\u1ea1nh (\u0111i\u1ec3n h\u00ecnh \u1edf th\u00e9p carbon). Ng\u01b0\u1ee3c l\u1ea1i, th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 Cr cao, C th\u1ea5p th\u01b0\u1eddng cho tia ng\u1eafn, \u00edt n\u1ed5.<br \/>\n&#8211; Tuy v\u1eady, tia l\u1eeda m\u00e0i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ecbnh t\u00ednh\/so s\u00e1nh. N\u00f3 r\u1ea5t t\u1ed1t \u0111\u1ec3 ph\u00e2n nh\u00f3m (austenitic vs ferritic vs martensitic vs th\u00e9p carbon), nh\u01b0ng kh\u00f3 ph\u00e2n bi\u1ec7t ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c m\u00e1c g\u1ea7n nhau nh\u01b0 304\/201 ho\u1eb7c 304\/316.<\/p>\n<h2 id=\"toc-1-dung-cu-va-an-toan\">D\u1ee5ng c\u1ee5 v\u00e0 an to\u00e0n<\/h2>\n<p>&#8211; M\u00e1y\/\u0111\u00e1 m\u00e0i: \u0111\u00e1 nh\u00f4m oxit 46\u201360 grit, \u0111\u1ed9 c\u1ee9ng trung b\u00ecnh (K\u2013N), t\u1ed1c \u0111\u1ed9 v\u00f2ng quay \u1ed5n \u0111\u1ecbnh (m\u00e1y \u0111\u1ec3 b\u00e0n 3000\u20133600 rpm l\u00e0 ph\u1ed5 bi\u1ebfn). Tr\u00e1nh d\u00f9ng \u0111\u00e1 m\u00f2n, b\u1ecb \u201cl\u00e1ng\u201d.<br \/>\n&#8211; Kh\u00f4ng gian: \u00e1nh s\u00e1ng n\u1ec1n d\u1ecbu, n\u1ec1n t\u1ed1i ph\u00eda sau \u0111\u01b0\u1eddng tia \u0111\u1ec3 quan s\u00e1t m\u00e0u v\u00e0 ki\u1ec3u n\u1ed5 r\u00f5.<br \/>\n&#8211; Chu\u1ea9n b\u1ecb m\u1eabu: b\u1ecf l\u1edbp s\u01a1n\/xi, r\u1ec9 s\u00e9t n\u1eb7ng, d\u1ea7u m\u1ee1. C\u1eaft c\u1ea1nh ph\u1eb3ng \u0111\u1ec3 ti\u1ebfp x\u00fac \u0111\u1ec1u.<br \/>\n&#8211; B\u1ea3o h\u1ed9: k\u00ednh che m\u1eb7t, g\u0103ng ch\u1ed1ng c\u1eaft, \u00e1o b\u1ea3o h\u1ed9, che ch\u1eafn tia b\u1eafn; tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng th\u1eed g\u1ea7n v\u1eadt d\u1ec5 ch\u00e1y.<\/p>\n<h2 id=\"toc-2-quy-trinh-5-buoc-quan-sat-tia-lua-mai\">Quy tr\u00ecnh 5 b\u01b0\u1edbc quan s\u00e1t tia l\u1eeda m\u00e0i<\/h2>\n<p>1) Hi\u1ec7u chu\u1ea9n b\u1eb1ng m\u1eabu chu\u1ea9n: tr\u01b0\u1edbc khi th\u1eed v\u1eadt ch\u01b0a r\u00f5, h\u00e3y m\u00e0i nhanh 2\u20133 m\u1eabu \u0111\u00e3 bi\u1ebft (v\u00ed d\u1ee5: th\u00e9p CT3, inox 304, inox 430) \u0111\u1ec3 \u201cc\u00e2n m\u1eaft\u201d trong \u0111i\u1ec1u ki\u1ec7n \u0111\u00e1\/\u00e1nh s\u00e1ng hi\u1ec7n t\u1ea1i.<br \/>\n2) \u00c1p l\u1ef1c m\u00e0i \u1ed5n \u0111\u1ecbnh: t\u1ef3 nh\u1eb9 \u0111\u1ebfn trung b\u00ecnh, gi\u1eef g\u00f3c 30\u201345\u00b0, tr\u00e1nh \u00e9p m\u1ea1nh l\u00e0m bi\u1ebfn d\u1ea1ng k\u1ebft qu\u1ea3.<br \/>\n3) Quan s\u00e1t 4 y\u1ebfu t\u1ed1 ch\u00ednh:<br \/>\n   &#8211; \u0110\u1ed9 d\u00e0i tia (so t\u01b0\u01a1ng \u0111\u1ed1i).<br \/>\n   &#8211; M\u1eadt \u0111\u1ed9 tia (nhi\u1ec1u\/\u00edt).<br \/>\n   &#8211; M\u00e0u s\u1eafc (\u0111\u1ecf s\u1eadm\u2013cam\u2013v\u00e0ng\u2013tr\u1eafng).<br \/>\n   &#8211; Ki\u1ec3u n\u1ed5 (kh\u00f4ng n\u1ed5\/\u00edt n\u1ed5\/n\u1ed5 sao d\u00e0y, ph\u00e2n nh\u00e1nh).<br \/>\n4) L\u1eb7p l\u1ea1i 2\u20133 l\u1ea7n \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau c\u1ee7a m\u1eabu \u0111\u1ec3 tr\u00e1nh \u0111i\u1ec3m c\u1ee5c b\u1ed9 b\u1ea5t th\u01b0\u1eddng.<br \/>\n5) Ghi ch\u00fa, so s\u00e1nh v\u1edbi m\u00f4 t\u1ea3 m\u1eabu \u0111i\u1ec3n h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<h2 id=\"toc-3-nhan-dien-mau-tia-lua-theo-nhom-inox-va-vat-lieu-l\">Nh\u1eadn di\u1ec7n m\u1eabu tia l\u1eeda theo nh\u00f3m inox v\u00e0 v\u1eadt li\u1ec7u li\u00ean quan<\/h2>\n<p>L\u01b0u \u00fd: m\u00f4 t\u1ea3 mang t\u00ednh \u0111i\u1ec3n h\u00ecnh; th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 dao \u0111\u1ed9ng do tr\u1ea1ng th\u00e1i nhi\u1ec7t luy\u1ec7n, \u0111\u1ed9 c\u1ee9ng, b\u1ec1 m\u1eb7t, lo\u1ea1i \u0111\u00e1 m\u00e0i.<\/p>\n<h3>1) Th\u00e9p carbon th\u01b0\u1eddng (\u0111\u1ec3 l\u00e0m \u0111\u1ed1i ch\u1ee9ng)<\/h3>\n<p>&#8211; Tia r\u1ea5t nhi\u1ec1u, d\u00e0i, s\u00e1ng v\u00e0ng-tr\u1eafng; n\u1ed5 sao d\u00e0y, ph\u00e2n nh\u00e1nh m\u1ea1nh ngay t\u1eeb gi\u1eefa \u0111\u1ebfn cu\u1ed1i \u0111u\u00f4i tia.<br \/>\n&#8211; T\u00e1c d\u1ee5ng: N\u1ebfu v\u1eadt cho tia ki\u1ec3u n\u00e0y, g\u1ea7n nh\u01b0 ch\u1eafc ch\u1eafn kh\u00f4ng ph\u1ea3i inox.<\/p>\n<h3>2) Inox austenitic: 304\/316 v\u00e0 201 (phi t\u1eeb t\u00ednh ho\u1eb7c t\u1eeb t\u00ednh r\u1ea5t nh\u1eb9)<\/h3>\n<p>&#8211; \u0110\u1eb7c tr\u01b0ng chung: tia \u00edt, ng\u1eafn h\u01a1n th\u00e9p carbon r\u00f5 r\u1ec7t; m\u00e0u \u0111\u1ecf-cam \u0111\u1ebfn v\u00e0ng nh\u1ea1t; h\u1ea7u nh\u01b0 kh\u00f4ng n\u1ed5 ho\u1eb7c n\u1ed5 r\u1ea5t \u00edt \u1edf cu\u1ed1i \u0111u\u00f4i.<br \/>\n&#8211; 304\/316 (C r\u1ea5t th\u1ea5p): tia \u00edt, ng\u1eafn, \u0111\u1ecf-cam tr\u1ea7m; g\u1ea7n nh\u01b0 kh\u00f4ng ph\u00e2n nh\u00e1nh. 316 th\u01b0\u1eddng kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t v\u1edbi 304 ch\u1ec9 b\u1eb1ng tia l\u1eeda.<br \/>\n&#8211; 201 (Mn cao, Ni th\u1ea5p): \u0111\u00f4i khi cho s\u1ed1 tia nh\u1ec9nh h\u01a1n 304, m\u00e0u cam s\u00e1ng h\u01a1n ch\u00fat v\u00e0 c\u00f3 th\u1ec3 c\u00f3 l\u1ea5m t\u1ea5m n\u1ed5 nh\u1ecf g\u1ea7n \u0111\u00e1 m\u00e0i; nh\u01b0ng s\u1ef1 kh\u00e1c bi\u1ec7t r\u1ea5t nh\u1eb9, kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<br \/>\n&#8211; K\u1ebft lu\u1eadn th\u1ef1c h\u00e0nh: Spark test kh\u00f4ng \u0111\u00e1ng tin \u0111\u1ec3 t\u00e1ch 201 v\u1edbi 304\/316; c\u1ea7n ki\u1ec3m ch\u1ee9ng th\u00eam (PMI, th\u1eed Mo\/Ni).<\/p>\n<h3>3) Inox ferritic: 430 (t\u1eeb t\u00ednh)<\/h3>\n<p>&#8211; Tia \u00edt \u0111\u1ebfn trung b\u00ecnh, d\u00e0i h\u01a1n austenitic m\u1ed9t ch\u00fat; m\u00e0u cam-v\u00e0ng nh\u1ea1t; n\u1ed5 sao r\u1ea5t \u00edt ho\u1eb7c kh\u00f4ng c\u00f3.<br \/>\n&#8211; C\u1ea3m gi\u00e1c \u201ckh\u00f4\u201d, \u0111\u01b0\u1eddng tia t\u01b0\u01a1ng \u0111\u1ed1i th\u1eb3ng, \u00edt ph\u00e2n nh\u00e1nh.<br \/>\n&#8211; M\u1eb9o ph\u00e2n nh\u00f3m: n\u1ebfu nam ch\u00e2m h\u00fat m\u1ea1nh v\u00e0 tia \u00edt-n\u1ed5, r\u1ea5t c\u00f3 th\u1ec3 l\u00e0 430.<\/p>\n<h3>4) Inox martensitic: 410\/420 (t\u1eeb t\u00ednh)<\/h3>\n<p>&#8211; Do h\u00e0m l\u01b0\u1ee3ng C cao h\u01a1n, tia d\u00e0i h\u01a1n v\u00e0 s\u00e1ng h\u01a1n ferritic; m\u00e0u v\u00e0ng-cam, xu\u1ea5t hi\u1ec7n c\u00e1c \u201cn\u1ed5 sao\u201d \u1edf 1\/3 cu\u1ed1i \u0111u\u00f4i tia.<br \/>\n&#8211; 420 (C cao h\u01a1n 410): m\u1eadt \u0111\u1ed9 n\u1ed5 sao d\u00e0y h\u01a1n, tia \u201cs\u1ed1ng\u201d h\u01a1n, \u0111\u00f4i khi th\u1ea5y ph\u00e2n nh\u00e1nh nh\u1eb9.<br \/>\n&#8211; D\u1ea5u hi\u1ec7u \u0111i\u1ec3n h\u00ecnh: t\u1eeb t\u00ednh m\u1ea1nh + tia c\u00f3 n\u1ed5 sao r\u00f5 r\u1ec7t \u2192 nghi\u00eang v\u1ec1 410\/420.<\/p>\n<h3>5) Inox duplex: 2205 (t\u1eeb t\u00ednh nh\u1eb9 \u0111\u1ebfn trung b\u00ecnh)<\/h3>\n<p>&#8211; Tia \u00edt \u0111\u1ebfn trung b\u00ecnh, d\u00e0i h\u01a1n austenitic m\u1ed9t ch\u00fat; m\u00e0u cam; c\u00f3 th\u1ec3 c\u00f3 v\u00e0i n\u1ed5 nh\u1ecf l\u1ebb nh\u01b0ng kh\u00f4ng d\u00e0y nh\u01b0 martensitic.<br \/>\n&#8211; R\u1ea5t d\u1ec5 b\u1ecb nh\u1ea7m v\u1edbi 430 qua tia l\u1eeda; c\u1ea7n d\u1ef1a th\u00eam t\u1eeb t\u00ednh (th\u01b0\u1eddng nh\u1eb9 h\u01a1n 430) v\u00e0 ki\u1ec3m ch\u1ee9ng PMI.<\/p>\n<h3>6) Inox k\u1ebft t\u1ee7a b\u1ec1n (PH): 17-4PH<\/h3>\n<p>&#8211; \u1ede tr\u1ea1ng th\u00e1i \u1ee7 dung d\u1ecbch: tia kh\u00e1 \u00edt, gi\u1ed1ng austenitic\/ferritic.<br \/>\n&#8211; \u1ede tr\u1ea1ng th\u00e1i h\u00f3a b\u1ec1n (H900\u2026H1150): c\u00f3 th\u1ec3 nhi\u1ec1u tia v\u00e0 n\u1ed5 h\u01a1n \u0111\u00f4i ch\u00fat do thay \u0111\u1ed5i vi c\u1ea5u tr\u00fac, nh\u01b0ng kh\u00f3 x\u00e1c quy\u1ebft.<br \/>\n&#8211; Nh\u1eadn \u0111\u1ecbnh: spark test ch\u1ec9 mang t\u00ednh g\u1ee3i \u00fd, c\u1ea7n PMI \u0111\u1ec3 k\u1ebft lu\u1eadn.<\/p>\n<h2 id=\"toc-4-so-do-quyet-dinh-nhanh-khi-nhin-tia-lua-mai\">S\u01a1 \u0111\u1ed3 quy\u1ebft \u0111\u1ecbnh nhanh khi nh\u00ecn tia l\u1eeda m\u00e0i<\/h2>\n<p>&#8211; Tia r\u1ea5t nhi\u1ec1u, d\u00e0i, n\u1ed5 d\u00e0y \u2192 lo\u1ea1i kh\u1ecfi inox (th\u00e9p carbon\/h\u1ee3p kim carbon).<br \/>\n&#8211; Tia \u00edt, ng\u1eafn, h\u1ea7u nh\u01b0 kh\u00f4ng n\u1ed5:<br \/>\n  &#8211; Nam ch\u00e2m kh\u00f4ng h\u00fat\/ h\u00fat r\u1ea5t nh\u1eb9 \u2192 austenitic (304\/316\/201).<br \/>\n  &#8211; Nam ch\u00e2m h\u00fat m\u1ea1nh \u2192 ferritic (430).<br \/>\n&#8211; Tia d\u00e0i h\u01a1n, c\u00f3 n\u1ed5 sao r\u00f5 + nam ch\u00e2m h\u00fat m\u1ea1nh \u2192 martensitic (410\/420).<br \/>\n&#8211; Tia \u00edt-trung b\u00ecnh, m\u1ed9t \u00edt n\u1ed5 l\u1ebb + t\u1eeb t\u00ednh nh\u1eb9-trung b\u00ecnh \u2192 c\u00e2n nh\u1eafc duplex (2205).<br \/>\n&#8211; Tr\u01b0\u1eddng h\u1ee3p \u201cl\u01b0ng ch\u1eebng\u201d \u2192 b\u1eaft bu\u1ed9c ki\u1ec3m ch\u1ee9ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c.<\/p>\n<h2 id=\"toc-5-nguon-sai-so-pho-bien-va-cach-khac-phuc\">Ngu\u1ed3n sai s\u1ed1 ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/h2>\n<p>&#8211; Lo\u1ea1i \u0111\u00e1 m\u00e0i\/\u00e1p l\u1ef1c kh\u00f4ng \u1ed5n \u0111\u1ecbnh: d\u00f9ng \u0111\u00e1 c\u00f9ng ch\u1ee7ng lo\u1ea1i, \u00e1p l\u1ef1c \u1ed5n \u0111\u1ecbnh; lu\u00f4n hi\u1ec7u chu\u1ea9n b\u1eb1ng m\u1eabu chu\u1ea9n ngay tr\u01b0\u1edbc khi th\u1eed.<br \/>\n&#8211; B\u1ec1 m\u1eb7t m\u1eabu b\u1ea9n, s\u01a1n, m\u1ea1 k\u1ebdm: l\u00e0m s\u1ea1ch \u0111\u1ebfn kim lo\u1ea1i n\u1ec1n tr\u01b0\u1edbc khi m\u00e0i.<br \/>\n&#8211; Tr\u1ea1ng th\u00e1i nhi\u1ec7t luy\u1ec7n: c\u00f9ng m\u1ed9t m\u00e1c nh\u01b0ng \u1ee7\/ t\u00f4i\/ ram kh\u00e1c nhau c\u00f3 th\u1ec3 l\u00e0m tia kh\u00e1c; so s\u00e1nh v\u1edbi m\u1eabu chu\u1ea9n c\u00f9ng tr\u1ea1ng th\u00e1i n\u1ebfu c\u00f3.<br \/>\n&#8211; L\u1eabn t\u1ea1p b\u1ec1 m\u1eb7t (b\u00e1m s\u1eaft sau gia c\u00f4ng): c\u00f3 th\u1ec3 khi\u1ebfn inox \u201cn\u1ed5\u201d h\u01a1n; l\u00e0m s\u1ea1ch c\u01a1 h\u1ecdc\/axit nh\u1eb9 tr\u01b0\u1edbc khi th\u1eed.<br \/>\n&#8211; \u00c1nh s\u00e1ng m\u00f4i tr\u01b0\u1eddng qu\u00e1 m\u1ea1nh: kh\u00f3 nh\u00ecn m\u00e0u tia; th\u1eed \u1edf n\u1ec1n t\u1ed1i h\u01a1n.<\/p>\n<h2 id=\"toc-6-khi-nao-khong-nen-chi-dua-vao-tia-lua-mai\">Khi n\u00e0o KH\u00d4NG n\u00ean ch\u1ec9 d\u1ef1a v\u00e0o tia l\u1eeda m\u00e0i?<\/h2>\n<p>&#8211; Ph\u00e2n bi\u1ec7t 304 v\u1edbi 201 ho\u1eb7c 304 v\u1edbi 316: spark test thi\u1ebfu \u0111\u1ed9 tin c\u1eady.<br \/>\n&#8211; X\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c m\u00e1c duplex ho\u1eb7c 17-4PH.<br \/>\n&#8211; Khi c\u1ea7n ch\u1ee9ng nh\u1eadn v\u1eadt li\u1ec7u cho d\u1ef1 \u00e1n\/kh\u00e1ch h\u00e0ng: ph\u1ea3i c\u00f3 ch\u1ee9ng th\u01b0 ho\u1eb7c k\u1ebft qu\u1ea3 PMI.<\/p>\n<h2 id=\"toc-7-phuong-phap-bo-sung-de-tang-do-chac-chan\">Ph\u01b0\u01a1ng ph\u00e1p b\u1ed5 sung \u0111\u1ec3 t\u0103ng \u0111\u1ed9 ch\u1eafc ch\u1eafn<\/h2>\n<p>&#8211; Nam ch\u00e2m: t\u00e1ch nhanh austenitic (th\u01b0\u1eddng phi t\u1eeb t\u00ednh) v\u1edbi ferritic\/martensitic (t\u1eeb t\u00ednh). L\u01b0u \u00fd: austenitic c\u00f3 th\u1ec3 nhi\u1ec5m t\u1eeb nh\u1eb9 sau gia c\u00f4ng ngu\u1ed9i.<br \/>\n&#8211; Th\u1eed h\u00f3a ch\u1ea5t t\u1ea1i ch\u1ed7:<br \/>\n  &#8211; Molybdenum (Moly-Drop) \u0111\u1ec3 ph\u00e2n bi\u1ec7t 316 (c\u00f3 Mo) v\u1edbi 304 (kh\u00f4ng Mo).<br \/>\n  &#8211; B\u1ed9 th\u1eed Ni (dimethylglyoxime) cho bi\u1ebft c\u00f3\/kh\u00f4ng Ni; tuy nhi\u00ean 201 v\u1eabn c\u00f3 Ni th\u1ea5p, c\u1ea7n di\u1ec5n gi\u1ea3i c\u1ea9n tr\u1ecdng.<br \/>\n&#8211; PMI b\u1eb1ng XRF\/OES: nhanh, \u0111\u1ecbnh danh ch\u00ednh x\u00e1c th\u00e0nh ph\u1ea7n (khuy\u1ebfn ngh\u1ecb cho nghi\u1ec7m thu).<br \/>\n&#8211; Ki\u1ec3m ch\u1ee9ng h\u1ed3 s\u01a1 MTR\/COA t\u1eeb nh\u00e0 cung c\u1ea5p uy t\u00edn.<\/p>\n<h2 id=\"toc-8-mot-vi-du-thuc-te-tai-xuong\">M\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1ea1i x\u01b0\u1edfng<\/h2>\n<p>M\u1ed9t x\u01b0\u1edfng nh\u1eadn l\u00f4 t\u1ea5m \u201c304\u201d d\u00e0y 1.5 mm. Ki\u1ec3m tra nhanh: nam ch\u00e2m h\u00fat kh\u00e1 r\u00f5, tia l\u1eeda m\u00e0i \u00edt-n\u1ed5, m\u00e0u cam nh\u1ea1t, d\u00e0i h\u01a1n 304 chu\u1ea9n; so v\u1edbi m\u1eabu 430 chu\u1ea9n th\u1ea5y kh\u00e1 tr\u00f9ng kh\u1edbp. Ki\u1ec3m ch\u1ee9ng PMI XRF cho k\u1ebft qu\u1ea3 Cr ~16\u201317%, Ni ~0.2% \u2192 k\u1ebft lu\u1eadn 430, tr\u00e1nh \u0111\u01b0\u1ee3c r\u1ee7i ro d\u00f9ng nh\u1ea7m v\u1eadt li\u1ec7u cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p>\n<h2 id=\"toc-9-checklist-nhanh-cho-tho-co-khi\">Checklist nhanh cho th\u1ee3 c\u01a1 kh\u00ed<\/h2>\n<p>&#8211; Chu\u1ea9n b\u1ecb: \u0111\u00e1 m\u00e0i ph\u00f9 h\u1ee3p, n\u1ec1n t\u1ed1i, PPE \u0111\u1ea7y \u0111\u1ee7.<br \/>\n&#8211; Hi\u1ec7u chu\u1ea9n m\u1eaft b\u1eb1ng 2\u20133 m\u1eabu chu\u1ea9n (CT3, 304, 430).<br \/>\n&#8211; Quan s\u00e1t 4 y\u1ebfu t\u1ed1: \u0111\u1ed9 d\u00e0i, m\u1eadt \u0111\u1ed9, m\u00e0u, ki\u1ec3u n\u1ed5.<br \/>\n&#8211; K\u1ebft h\u1ee3p nam ch\u00e2m \u0111\u1ec3 ph\u00e2n nh\u00f3m.<br \/>\n&#8211; Tr\u01b0\u1eddng h\u1ee3p nghi ng\u1edd: d\u00f9ng Moly-Drop\/kit Ni ho\u1eb7c PMI XRF.<br \/>\n&#8211; Ghi ch\u00e9p k\u1ebft qu\u1ea3 v\u00e0 d\u00e1n nh\u00e3n t\u1ea1m th\u1eddi tr\u00ean ph\u00f4i.<\/p>\n<h2 id=\"toc-10-tai-lieu-tham-khao\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<p>&#8211; ASM International, Metals Handbook, Vol. 9: Metallography and Microstructures \u2013 ph\u1ea7n Spark Testing (t\u1ed5ng quan k\u1ef9 thu\u1eadt v\u00e0 nh\u1eadn di\u1ec7n).<br \/>\n&#8211; Machinery\u2019s Handbook (Industrial Press) \u2013 m\u1ee5c Spark Testing (m\u00f4 t\u1ea3 m\u1eabu tia l\u1eeda cho th\u00e9p carbon\/h\u1ee3p kim).<br \/>\n&#8211; Outokumpu Stainless Steel Handbook \u2013 t\u00ednh ch\u1ea5t c\u00e1c nh\u00f3m inox (t\u1eeb t\u00ednh, th\u00e0nh ph\u1ea7n).<br \/>\n&#8211; SSINA \u2013 Magnetic properties of stainless steel (gi\u1ea3i th\u00edch t\u1eeb t\u00ednh c\u00e1c nh\u00f3m inox).<br \/>\n&#8211; Atlas Steels Technical Handbook of Stainless Steels (t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt v\u1ec1 m\u00e1c inox, \u1ee9ng d\u1ee5ng v\u00e0 t\u00ednh ch\u1ea5t).<\/p>\n<h2 id=\"toc-11-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Tia l\u1eeda m\u00e0i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u00e0ng l\u1ecdc nhanh, chi ph\u00ed th\u1ea5p \u0111\u1ec3 ph\u00e2n nh\u00f3m inox ngay t\u1ea1i x\u01b0\u1edfng:<br \/>\n  &#8211; Austenitic (304\/316\/201): tia \u00edt, ng\u1eafn, h\u1ea7u nh\u01b0 kh\u00f4ng n\u1ed5.<br \/>\n  &#8211; Ferritic (430): tia \u00edt-trung b\u00ecnh, \u00edt n\u1ed5, t\u1eeb t\u00ednh m\u1ea1nh.<br \/>\n  &#8211; Martensitic (410\/420): tia d\u00e0i h\u01a1n, c\u00f3 n\u1ed5 sao r\u00f5, t\u1eeb t\u00ednh m\u1ea1nh.<br \/>\n  &#8211; Duplex\/PH: m\u1eabu tia \u201cl\u01b0ng ch\u1eebng\u201d, c\u1ea7n PMI \u0111\u1ec3 ch\u1eafc ch\u1eafn.<br \/>\n&#8211; Kh\u00f4ng n\u00ean d\u00f9ng spark test \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c m\u00e1c austenitic g\u1ea7n nhau (304 vs 201\/316); h\u00e3y k\u1ebft h\u1ee3p nam ch\u00e2m, h\u00f3a ch\u1ea5t t\u1ea1i ch\u1ed7 ho\u1eb7c PMI XRF \u0111\u1ec3 x\u00e1c nh\u1eadn.<br \/>\n&#8211; Th\u1ef1c h\u00e0nh \u0111\u00fang quy tr\u00ecnh, hi\u1ec7u chu\u1ea9n b\u1eb1ng m\u1eabu chu\u1ea9n v\u00e0 ghi ch\u00e9p gi\u00fap gi\u1ea3m sai s\u1ed1 v\u00e0 n\u00e2ng \u0111\u1ed9 tin c\u1eady ki\u1ec3m \u0111\u1ecbnh t\u1ea1i ch\u1ed7.<\/p>\n<p>C\u1ea7n t\u01b0 v\u1ea5n ch\u1ecdn \u0111\u00fang m\u00e1c inox cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn v\u00e0 b\u00e1o gi\u00e1 t\u1ed1t nh\u1ea5t. Hotline: 0343.417.281. Email: inoxcongnghiep.cuongthinh@gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn chi ti\u1ebft nh\u1eadn bi\u1ebft inox 304, 201, 430, 410\u2026 b\u1eb1ng tia l\u1eeda m\u00e0i: d\u1ee5ng c\u1ee5, quy tr\u00ecnh, m\u1eabu tia l\u1eeda, an to\u00e0n, sai s\u1ed1 v\u00e0 c\u00e1ch ki\u1ec3m ch\u1ee9ng k\u1ebft qu\u1ea3 t\u1ea1i x\u01b0\u1edfng.<\/p>\n","protected":false},"author":7,"featured_media":1001,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=1463"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1463\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1001"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}