Ng\u01b0\u1eddi ti\u00eau d\u00f9ng th\u00f4ng th\u01b0\u1eddng c\u00f3 m\u1ed9t s\u1ed1 hi\u1ec3u l\u1ea7m v\u1ec1 inox, h\u1ecd cho r\u1eb1ng inox t\u1eeb t\u00ednh kh\u00f4ng \u0111\u1ee7 ti\u00eau chu\u1ea9n inox 304. Nh\u01b0 ch\u00fang ta \u0111\u00e3 bi\u1ebft, theo c\u1ea5u tr\u00fac \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh Austenite nh\u01b0 201, 304, 321, 316, 310, Martensite ho\u1eb7c Ferric nh\u01b0 430, 420, 410. Austenit kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh ho\u1eb7c c\u00f3 t\u1eeb t\u00ednh y\u1ebfu v\u00e0 Martensite ho\u1eb7c ferrite c\u00f3 t\u1eeb t\u00ednh. 304 l\u00e0 lo\u1ea1i \u0111\u1ea1i di\u1ec7n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 austenit, n\u00f3 c\u00f3 kh\u1ea3 n\u0103ng gia c\u00f4ng, kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi, chi\u1ebfm 60% l\u01b0\u1ee3ng ti\u00eau th\u1ee5 th\u00e9p kh\u00f4ng g\u1ec9 tr\u00ean th\u1ebf gi\u1edbi, n\u00f3i chung, n\u00f3 kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh, nh\u01b0ng \u0111\u00f4i khi n\u00f3 c\u00f3 t\u1eeb t\u00ednh ho\u1eb7c t\u1eeb t\u00ednh y\u1ebfu do n\u1ea5u ch\u1ea3y s\u1ef1 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc hay qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nh\u01b0ng ch\u00fang ta kh\u00f4ng th\u1ec3 cho r\u1eb1ng \u0111\u00e2y l\u00e0 h\u00e0ng gi\u1ea3, h\u00e0ng k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng, nguy\u00ean nh\u00e2n l\u00e0 g\u00ec?<\/p>\n
304 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 si\u00eau b\u1ec1n, l\u00e0 c\u1ea5u tr\u00fac austenit \u0111\u01a1n sau tr\u1ea1ng th\u00e1i \u1ee7, kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh. Vi\u1ec7c t\u00e1ch th\u00e0nh ph\u1ea7n n\u1ea5u ch\u1ea3y ho\u1eb7c x\u1eed l\u00fd nhi\u1ec7t kh\u00f4ng \u0111\u00fang c\u00e1ch s\u1ebd t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf c\u1ea5u tr\u00fac martensite ho\u1eb7c ferit, do \u0111\u00f3 c\u00f3 t\u1eeb t\u00ednh y\u1ebfu. Ngo\u00e0i ra, sau qu\u00e1 tr\u00ecnh bi\u1ebfn d\u1ea1ng gia c\u00f4ng ngu\u1ed9i (nh\u01b0 d\u1eadp, k\u00e9o gi\u00e3n, c\u00e1n, v.v.), m\u1ed9t ph\u1ea7n c\u1ea5u tr\u00fac austenite c\u0169ng tr\u1ea3i qua qu\u00e1 tr\u00ecnh thay \u0111\u1ed5i pha (\u0111\u1ed9t bi\u1ebfn chung th\u00e0nh martensite) v\u00e0 c\u00f3 t\u1eeb t\u00ednh.<\/p>\n
V\u00ed d\u1ee5, trong c\u00f9ng m\u1ed9t l\u00f4 th\u00e9p, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a \u1ed1ng th\u00e9p 76mm kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh r\u00f5 r\u00e0ng trong khi \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a \u1ed1ng th\u00e9p 9,5mm c\u00f3 t\u1eeb t\u00ednh r\u00f5 r\u00e0ng. T\u00ednh ch\u1ea5t t\u1eeb c\u1ee7a \u1ed1ng h\u00ecnh ch\u1eef nh\u1eadt vu\u00f4ng r\u00f5 r\u00e0ng h\u01a1n do bi\u1ebfn d\u1ea1ng u\u1ed1n ngu\u1ed9i l\u1edbn h\u01a1n \u1ed1ng tr\u00f2n, \u0111\u1eb7c bi\u1ec7t \u1edf ph\u1ea7n u\u1ed1n.<\/p>\n
H\u1ea7u h\u1ebft b\u1ed3n r\u1eeda n\u01b0\u1edbc \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 304. Nhi\u1ec1u ng\u01b0\u1eddi ti\u00eau d\u00f9ng \u0111\u00e1nh gi\u00e1 n\u00f3 \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng inox 304 t\u00f9y theo b\u00ecnh ch\u1ee9a n\u01b0\u1edbc c\u00f3 t\u1eeb t\u00ednh hay kh\u00f4ng. Hi\u1ec7n nay, c\u00f3 nhi\u1ec1u lo\u1ea1i c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd b\u1ed3n r\u1eeda, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1ea1o h\u00ecnh h\u00e0n, t\u1ea1o h\u00ecnh k\u00e9o \u0111\u1ee9t, v.v., n\u1ebfu s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u h\u00e0n t\u1ea1o h\u00ecnh 304, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee7 sau khi x\u1eed l\u00fd t\u1ea5m, s\u1ebd kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh ho\u1eb7c t\u1eeb t\u00ednh y\u1ebfu (v\u00ec x\u1eed l\u00fd b\u1ec1 m\u1eb7t c\u1ee7a b\u1ed3n r\u1eeda); M\u1ed9t trong nh\u1eefng khu\u00f4n k\u00e9o b\u1ec3 n\u01b0\u1edbc c\u1ea7n ph\u1ea3i tr\u1ea3i qua nhi\u1ec1u l\u1ea7n k\u00e9o d\u00e3n, \u1ee7 chung r\u1ed3i m\u1edbi k\u00e9o d\u00e3n (\u1ee7 l\u00e0m t\u0103ng gi\u00e1 th\u00e0nh, 304 kh\u00f4ng c\u1ea7n \u1ee7 l\u1ea1i), s\u1ebd c\u00f3 t\u1eeb t\u00ednh, \u0111\u00f3 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng r\u1ea5t b\u00ecnh th\u01b0\u1eddng.<\/p>","protected":false},"excerpt":{"rendered":"
Ng\u01b0\u1eddi ti\u00eau d\u00f9ng th\u00f4ng th\u01b0\u1eddng c\u00f3 m\u1ed9t s\u1ed1 hi\u1ec3u l\u1ea7m v\u1ec1 inox, h\u1ecd cho r\u1eb1ng inox t\u1eeb t\u00ednh kh\u00f4ng \u0111\u1ee7 ti\u00eau chu\u1ea9n inox 304. Nh\u01b0 ch\u00fang ta \u0111\u00e3 bi\u1ebft, theo c\u1ea5u tr\u00fac \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh Austenite nh\u01b0 201, 304, 321, 316, 310, Martensite ho\u1eb7c Ferric nh\u01b0 430, 420, 410. Austenit l\u00e0 ch\u1ea5t kh\u00f4ng t\u1eeb t\u00ednh [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2138","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/comments?post=2138"}],"version-history":[{"count":1,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2138\/revisions"}],"predecessor-version":[{"id":2139,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2138\/revisions\/2139"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/media?parent=2138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/categories?post=2138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/tags?post=2138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}