{"id":11748,"date":"2024-10-10T17:54:00","date_gmt":"2024-10-10T09:54:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=11748"},"modified":"2024-11-21T10:49:19","modified_gmt":"2024-11-21T02:49:19","slug":"grade-904l","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-904l\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 904L: \u0110\u1ecbnh ngh\u0129a, Th\u00e0nh ph\u1ea7n, T\u00ednh ch\u1ea5t, X\u1eed l\u00fd, \u1ee8ng d\u1ee5ng v\u00e0 Th\u00eam th\u00f4ng tin"},"content":{"rendered":"

T\u1ed5ng quan v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h2>

Th\u00e9p kh\u00f4ng g\u1ec9 904L (UNS N08904) l\u00e0 m\u1ed9t si\u00eau th\u00e9p kh\u00f4ng g\u1ec9 austenit<\/a>, ch\u1ee7 y\u1ebfu bao g\u1ed3m crom 19-23%, niken 23-28%, molypden 4-5% v\u00e0 \u0111\u1ed3ng 1-2%. \u0110\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n ASTM A240 v\u00e0 EN 10088-2 v\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 1.4539 (EN) v\u00e0 SUS 904L (JIS).<\/p>

Lo\u1ea1i n\u00e0y \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng axit v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n khe h\u1edf cao. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t, d\u1ea7u kh\u00ed v\u00e0 d\u01b0\u1ee3c ph\u1ea9m. 904L c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t nh\u01b0ng c\u1ea7n kim lo\u1ea1i \u0111\u1ed9n.<\/p>

\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h3>
Ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/strong><\/td>\u1ee8ng d\u1ee5ng<\/strong><\/td><\/tr>
X\u1eed l\u00fd h\u00f3a h\u1ecdc<\/td>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, B\u1ed3n ch\u1ee9a, H\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng, Van<\/td><\/tr>
D\u1ea7u kh\u00ed<\/td>N\u1ec1n t\u1ea3ng ngo\u00e0i kh\u01a1i, \u0110\u01b0\u1eddng \u1ed1ng, M\u00e1y b\u01a1m, Thi\u1ebft b\u1ecb \u0111\u1ea7u gi\u1ebfng<\/td><\/tr>
D\u01b0\u1ee3c ph\u1ea9m<\/td>B\u1ed3n tr\u1ed9n, M\u00e1y ti\u1ec7t tr\u00f9ng, L\u00f2 ph\u1ea3n \u1ee9ng x\u1eed l\u00fd, B\u00ecnh ch\u1ee9a<\/td><\/tr>
S\u1ea3n xu\u1ea5t \u0111i\u1ec7n<\/td>M\u00e1y l\u1ecdc kh\u00ed th\u1ea3i, Th\u00f9ng ch\u1ee9a ch\u1ea5t th\u1ea3i h\u1ea1t nh\u00e2n, C\u00e1nh tuabin, H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t<\/td><\/tr><\/tbody><\/table><\/figure>

\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h3>

Sau \u0111\u00e2y l\u00e0 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 l\u1ee3i \u00edch c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

  1. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/li>\n\n
  2. Kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu axit cao, bao g\u1ed3m axit sunfuric v\u00e0 axit photphoric.<\/li>\n\n
  3. Kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 v\u00e0 \u0103n m\u00f2n khe h\u1edf cao.<\/li>\n\n
  4. \u0110\u1ed9 b\u1ec1n cao \u1edf c\u1ea3 nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p.<\/li>\n\n
  5. Kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 t\u1ea1o h\u00ecnh t\u1ed1t cho nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/li><\/ol>

    Sau \u0111\u00e2y l\u00e0 nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m v\u00e0 h\u1ea1n ch\u1ebf c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

    1. Chi ph\u00ed cao h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c.<\/li>\n\n
    2. Kh\u00f3 gia c\u00f4ng v\u00ec \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai cao.<\/li>\n\n
    3. C\u1ea7n c\u00f3 c\u00f4ng c\u1ee5 \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 h\u00e0n v\u00e0 ch\u1ebf t\u1ea1o.<\/li>\n\n
    4. T\u00ednh kh\u1ea3 d\u1ee5ng h\u1ea1n ch\u1ebf so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 th\u00f4ng d\u1ee5ng h\u01a1n.<\/li>\n\n
    5. Tr\u1ecdng l\u01b0\u1ee3ng n\u1eb7ng h\u01a1n c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng n\u00f3 trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng.<\/li><\/ol>

      C\u00e1c c\u1ea5p \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h3>
      Qu\u1ed1c gia\/Khu v\u1ef1c<\/strong><\/td>Ti\u00eau chu\u1ea9n<\/strong><\/td>L\u1edbp t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/td><\/tr>
      Li\u00ean minh ch\u00e2u \u00c2u<\/td>EN 10088-1<\/td>X1NiCrMoCu25-20-5 (1.4539)<\/td><\/tr>
      Hoa K\u1ef3<\/td>Ti\u00eau chu\u1ea9n ASTMA240<\/td>904L, N08904<\/td><\/tr>
      Ph\u00e1p<\/td>S\u1ed1 hi\u1ec7u A35-576<\/td>Z2NCDU25-20<\/td><\/tr>
      Anh<\/td>BS 1449<\/td>904S13<\/td><\/tr>
      Th\u1ee5y \u0110i\u1ec3n<\/td>Th\u1ee9 6 14 25 62<\/td>2562<\/td><\/tr>
      Ba Lan<\/td>S\u1ed1 67\/H-86020<\/td>00H22N24M4TCu<\/td><\/tr><\/tbody><\/table><\/figure>

      Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h2>

      Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 400\u00b0C (752\u00b0F). Tuy nhi\u00ean, n\u00f3 kh\u00f4ng l\u00fd t\u01b0\u1edfng \u0111\u1ec3 s\u1eed d\u1ee5ng l\u00e2u d\u00e0i \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n. \u0110\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a n\u00f3 gi\u1ea3m khi v\u01b0\u1ee3t qu\u00e1 400\u00b0C. M\u1eb7c d\u00f9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a, nh\u01b0ng n\u00f3 ph\u00f9 h\u1ee3p h\u01a1n \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n so v\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao.<\/p>

      Ch\u1ed1ng \u0103n m\u00f2n<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L mang l\u1ea1i s\u1ef1 v\u01b0\u1ee3t tr\u1ed9i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/a>H\u00e0m l\u01b0\u1ee3ng molypden cao c\u1ee7a n\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 tuy\u1ec7t v\u1eddi ch\u1ed1ng l\u1ea1i s\u1ef1 \u0103n m\u00f2n r\u1ed7 v\u00e0 khe h\u1edf, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u clorua. Vi\u1ec7c b\u1ed5 sung \u0111\u1ed3ng l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n trong axit sunfuric \u1edf m\u1ecdi n\u1ed3ng \u0111\u1ed9, \u0111i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 v\u01b0\u1ee3t tr\u1ed9i h\u01a1n nhi\u1ec1u lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c v\u1ec1 m\u1eb7t n\u00e0y.<\/p>

      M\u1eb7c d\u00f9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng n\u1ee9t \u0103n m\u00f2n do \u1ee9ng su\u1ea5t clorua t\u1ed1t h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p austenit kh\u00e1c, nh\u01b0ng n\u00f3 v\u1eabn c\u00f3 th\u1ec3 d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c n\u1ed3ng \u0111\u1ed9 clorua cao. H\u00e0m l\u01b0\u1ee3ng carbon th\u1ea5p c\u1ee7a n\u00f3 c\u0169ng gi\u1ea3m thi\u1ec3u nguy c\u01a1 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t trong qu\u00e1 tr\u00ecnh h\u00e0n, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 c\u1ea3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 kh\u1ea3 n\u0103ng h\u00e0n \u0111\u1ec1u quan tr\u1ecdng, ch\u1eb3ng h\u1ea1n nh\u01b0 trong m\u00f4i tr\u01b0\u1eddng x\u1eed l\u00fd h\u00f3a ch\u1ea5t v\u00e0 n\u01b0\u1edbc bi\u1ec3n.<\/p>

      Gia c\u00f4ng th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h2>

      H\u00ecnh th\u00e0nh<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh t\u1ed1t<\/strong> do c\u1ea5u tr\u00fac austenit c\u1ee7a n\u00f3. N\u00f3 c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh v\u00e0 t\u1ea1o h\u00ecnh b\u1eb1ng c\u00e1c k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n nh\u01b0 u\u1ed1n, k\u00e9o v\u00e0 \u00e9p. Tuy nhi\u00ean, h\u00e0m l\u01b0\u1ee3ng h\u1ee3p kim cao c\u1ee7a n\u00f3 khi\u1ebfn n\u00f3 kh\u00f3 gia c\u00f4ng h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 c\u1ea5p th\u1ea5p. Kh\u00f4ng c\u1ea7n ph\u1ea3i gia nhi\u1ec7t tr\u01b0\u1edbc, nh\u01b0ng v\u1eadt li\u1ec7u n\u00e0y c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u l\u1ef1c h\u01a1n khi t\u1ea1o h\u00ecnh do \u0111\u1ed9 b\u1ec1n c\u1ee7a n\u00f3. Sau khi t\u1ea1o h\u00ecnh, c\u00f3 th\u1ec3 c\u1ea7n \u1ee7 \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t v\u00e0 duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/p>

      H\u00e0n<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t<\/strong> v\u00e0 c\u00f3 th\u1ec3 h\u00e0n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u00f4ng th\u01b0\u1eddng nh\u01b0 h\u00e0n TIG, h\u00e0n MIG v\u00e0 h\u00e0n que. H\u00e0m l\u01b0\u1ee3ng cacbon th\u1ea5p c\u1ee7a n\u00f3 l\u00e0m gi\u1ea3m nguy c\u01a1 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t. Nhi\u1ec7t \u0111\u1ea7u v\u00e0o n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Kh\u00f4ng c\u1ea7n gia nhi\u1ec7t tr\u01b0\u1edbc v\u00e0 x\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. S\u1eed d\u1ee5ng kim lo\u1ea1i ph\u1ee5 nh\u01b0 ERNiCrMo-3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/p>

      Gia c\u00f4ng<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng gia c\u00f4ng k\u00e9m<\/strong> do \u0111\u1ed9 b\u1ec1n v\u00e0 xu h\u01b0\u1edbng l\u00e0m c\u1ee9ng khi gia c\u00f4ng. N\u00f3 c\u00f3 th\u1ec3 l\u00e0m k\u1eb9t c\u00e1c d\u1ee5ng c\u1ee5, \u0111\u00f2i h\u1ecfi t\u1ed1c \u0111\u1ed9 ch\u1eadm v\u00e0 l\u1ef1c c\u1eaft cao h\u01a1n. C\u00e1c d\u1ee5ng c\u1ee5 cacbua s\u1eafc ho\u1eb7c g\u1ed1m c\u00f3 b\u00f4i tr\u01a1n th\u00edch h\u1ee3p \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 qu\u1ea3n l\u00fd nhi\u1ec7t. T\u1ed1c \u0111\u1ed9 c\u1eaft th\u1ea5p v\u00e0 l\u01b0\u1ee3ng \u0103n dao l\u1edbn gi\u00fap ng\u0103n ng\u1eeba qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng khi gia c\u00f4ng. \u0110\u1ed9 m\u00f2n c\u1ee7a d\u1ee5ng c\u1ee5 r\u1ea5t \u0111\u00e1ng k\u1ec3, do \u0111\u00f3 c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i thay \u0111\u1ed5i d\u1ee5ng c\u1ee5 th\u01b0\u1eddng xuy\u00ean ho\u1eb7c m\u00e0i l\u1ea1i. Gia c\u00f4ng 904L \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ec3 gi\u1ea3m thi\u1ec3u \u0111\u1ed9 m\u00f2n c\u1ee7a d\u1ee5ng c\u1ee5 v\u00e0 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t.<\/p>

      X\u1eed l\u00fd nhi\u1ec7t<\/h3>

      Th\u00e9p kh\u00f4ng g\u1ec9 904L kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m c\u1ee9ng b\u1eb1ng c\u00e1ch x\u1eed l\u00fd nhi\u1ec7t<\/strong>. Qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t ch\u00ednh cho 904L l\u00e0 dung d\u1ecbch \u1ee7<\/strong>, trong \u0111\u00f3 v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c nung n\u00f3ng \u0111\u1ebfn kho\u1ea3ng 1090-1175\u00b0C (1994-2147\u00b0F), sau \u0111\u00f3 l\u00e0m ngu\u1ed9i nhanh, th\u01b0\u1eddng l\u00e0 trong n\u01b0\u1edbc, \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc. <\/p>

      \u1ee6 dung d\u1ecbch c\u0169ng gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 nh\u1ea1y c\u1ea3m b\u1eb1ng c\u00e1ch \u0111\u1ea3m b\u1ea3o th\u00e9p ngu\u1ed9i \u0111\u1ee7 nhanh \u0111\u1ec3 tr\u00e1nh k\u1ebft t\u1ee7a cacbua, c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u1edf c\u00e1c khu v\u1ef1c h\u00e0n ho\u1eb7c nung n\u00f3ng.<\/p>

      Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h2>

      Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

      Y\u1ebfu t\u1ed1<\/strong><\/td>Cacbon, C<\/strong><\/td>Crom, Cr<\/strong><\/td>\u0110\u1ed3ng, Cu<\/strong><\/td>S\u1eaft, Fe<\/strong><\/td>Mangan, Mn<\/strong><\/td>Molypden, Mo<\/strong><\/td>Niken, Ni<\/strong><\/td>Silic, Si<\/strong><\/td>L\u01b0u hu\u1ef3nh, S<\/strong><\/td><\/tr>
      Wt%<\/td>\u2264 0,020 %<\/td>19 – 23 %<\/td>1.0 – 2.0 %<\/td>38.9 – 53 %<\/td>\u2264 2.0 %<\/td>4.0 – 5.0 %<\/td>23 – 28 %<\/td>\u2264 1,0 %<\/td>\u2264 0,035 %<\/td><\/tr><\/tbody><\/table><\/figure>

      T\u00ednh ch\u1ea5t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L<\/h2>

      Sau \u0111\u00e2y l\u00e0 ba l\u00fd do ch\u00ednh khi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 904L tr\u1edf n\u00ean \u0111\u1ed9c \u0111\u00e1o:<\/p>

      1. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n cao trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t nh\u01b0 n\u01b0\u1edbc bi\u1ec3n v\u00e0 axit.<\/li>\n\n
      2. \u0110\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai v\u01b0\u1ee3t tr\u1ed9i, ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/li>\n\n
      3. Kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 t\u1ea1o h\u00ecnh tuy\u1ec7t v\u1eddi cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ph\u1ee9c t\u1ea1p.<\/li><\/ol>

        T\u00ednh ch\u1ea5t v\u1eadt l\u00fd<\/h3>

        Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

        T\u00e0i s\u1ea3n<\/strong><\/td>Gi\u00e1 tr\u1ecb s\u1ed1 li\u1ec7u<\/strong><\/td>Gi\u00e1 tr\u1ecb \u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr>
        T\u1ec9 tr\u1ecdng<\/td>7,90 g\/cc<\/td>0,285 lb\/in\u00b3<\/td><\/tr>
        CTE, Tuy\u1ebfn t\u00ednh (20,0 \u2013 100 \u00b0C \/ 68,0 \u2013 212 \u00b0F)<\/td>15,3 \u00b5m\/m-\u00b0C<\/td>8,50 \u00b5in\/in-\u00b0F<\/td><\/tr>
        Nhi\u1ec7t dung ri\u00eang<\/td>0,460 J\/g-\u00b0C<\/td>0,110 BTU\/lb-\u00b0F<\/td><\/tr>
        \u0110\u1ed9 d\u1eabn nhi\u1ec7t (20,0 \u00b0C \/ 68,0 \u00b0F)<\/td>11,5 W\/mK<\/td>79,8 BTU-in\/gi\u1edd-ft\u00b2-\u00b0F<\/td><\/tr>
        \u0110i\u1ec7n tr\u1edf su\u1ea5t<\/td>0,0000952 ohm-cm<\/td>0,0000952 ohm-cm<\/td><\/tr>
        \u0110\u1ed9 t\u1eeb th\u1ea9m<\/td><= 1,02<\/td><= 1,02<\/td><\/tr><\/tbody><\/table><\/figure>

        T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3>

        Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

        T\u00e0i s\u1ea3n<\/strong><\/td>Gi\u00e1 tr\u1ecb<\/strong><\/td>Hi\u1ec7u su\u1ea5t<\/strong><\/td><\/tr>
        \u0110\u1ed9 b\u1ec1n k\u00e9o<\/td>490 MPa (71,1 ksi)<\/td>\u0110\u1ed9 b\u1ec1n cao, \u0111\u1ed9 b\u1ec1n t\u1ed1t<\/td><\/tr>
        S\u1ee9c ch\u1ecbu l\u1ef1c<\/td>220 MPa (31,9 ksi)<\/td>\u0110\u1ed9 b\u1ec1n k\u00e9o t\u1ed1t, duy tr\u00ec h\u00ecnh d\u1ea1ng<\/td><\/tr>
        \u0110\u1ed9 c\u1ee9ng Rockwell (HRB)<\/td>70 \u2013 90 HRB<\/td>\u0110\u1ed9 c\u1ee9ng v\u1eeba ph\u1ea3i, ch\u1ed1ng bi\u1ebfn d\u1ea1ng<\/td><\/tr>
        \u0110\u1ed9 gi\u00e3n d\u00e0i khi \u0111\u1ee9t<\/td>35%<\/td>\u0110\u1ed9 d\u1ebbo cao, co gi\u00e3n m\u00e0 kh\u00f4ng b\u1ecb \u0111\u1ee9t<\/td><\/tr>
        M\u00f4 \u0111un Young<\/td>200 GPa (29,0 Msi)<\/td>V\u1eadt li\u1ec7u c\u1ee9ng, ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng cao<\/td><\/tr><\/tbody><\/table><\/figure>

        T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc<\/h3>

        Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ed1t l\u00f5i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L:<\/p>

        T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc<\/strong><\/td>S\u1ef1 mi\u00eau t\u1ea3<\/strong><\/td>Hi\u1ec7u su\u1ea5t<\/strong><\/td><\/tr>
        Ch\u1ed1ng \u0103n m\u00f2n<\/td>Kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i thi\u1ec7t h\u1ea1i do m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n g\u00e2y ra<\/td>Tuy\u1ec7t v\u1eddi trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, v\u01b0\u1ee3t tr\u1ed9i h\u01a1n h\u1eb3n 316L<\/td><\/tr>
        Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a<\/td>Kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh oxy h\u00f3a \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/td>R\u1ea5t cao, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi 400\u00b0C, t\u1ed1t h\u01a1n th\u00e9p ti\u00eau chu\u1ea9n<\/td><\/tr>
        \u0110\u1ed9 \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc<\/td>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh khi ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t theo th\u1eddi gian<\/td>Duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n trong \u0111i\u1ec1u ki\u1ec7n h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t<\/td><\/tr>
        Kh\u1ea3 n\u0103ng kh\u00e1ng axit v\u00e0 ki\u1ec1m<\/td>Kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu v\u1edbi m\u00f4i tr\u01b0\u1eddng axit v\u00e0 ki\u1ec1m<\/td>Kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu t\u1ed1t v\u1edbi c\u1ea3 axit v\u00e0 baz\u01a1, x\u1eed l\u00fd t\u1ed1t axit sunfuric<\/td><\/tr>
        Ch\u1ed1ng g\u1ec9<\/td>Kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ec9 s\u00e9t trong nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau<\/td>V\u01b0\u1ee3t tr\u1ed9i h\u01a1n nhi\u1ec1u lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i<\/td><\/tr><\/tbody><\/table><\/figure>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L so v\u1edbi 316L<\/h2>

        Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 c\u00f3 s\u1ef1 so s\u00e1nh nhanh gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 904L v\u00e0 316L:<\/p>

        T\u00e0i s\u1ea3n<\/strong><\/td>904L<\/strong><\/td>316L<\/strong><\/td><\/tr>
        Ki\u1ec3u<\/td>Austenit<\/td>Austenit<\/td><\/tr>
        C\u1ea5u tr\u00fac tinh th\u1ec3<\/td>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng t\u00e2m m\u1eb7t (FCC)<\/td>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng t\u00e2m m\u1eb7t (FCC)<\/td><\/tr>
        Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/td>C: .02%, Cr: 19-23%, Ni: 23-28%, Mo: 4-5%, Cu: 1-2%<\/td>C: \u22640,03%, Cr: 16-18%, Ni: 10-12%, Mo: 2-3%<\/td><\/tr>
        Ch\u1ed1ng \u0103n m\u00f2n<\/td>Tuy\u1ec7t v\u1eddi trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t<\/td>T\u1ed1t trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng<\/td><\/tr>
        T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/td>T\u1ed1t t\u1ed5ng th\u1ec3<\/td>C\u00e2n b\u1eb1ng<\/td><\/tr>
        Kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh<\/td>T\u1ed1t<\/td>Xu\u1ea5t s\u1eafc<\/td><\/tr>
        Kh\u1ea3 n\u0103ng h\u00e0n<\/td>T\u1ed1t<\/td>Xu\u1ea5t s\u1eafc<\/td><\/tr>
        Kh\u1ea3 n\u0103ng gia c\u00f4ng<\/td>H\u1ed9i ch\u1ee3<\/td>T\u1ed1t<\/td><\/tr>
        T\u00ednh ch\u1ea5t t\u1eeb t\u00ednh<\/td>Kh\u00f4ng t\u1eeb t\u00ednh<\/td>Kh\u00f4ng t\u1eeb t\u00ednh<\/td><\/tr>
        Tr\u1ecb gi\u00e1<\/td>Cao<\/td>V\u1eeba ph\u1ea3i<\/td><\/tr>
        \u1ee8ng d\u1ee5ng<\/td>S\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t, d\u01b0\u1ee3c ph\u1ea9m v\u00e0 n\u01b0\u1edbc bi\u1ec3n<\/td>Ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, y t\u1ebf, h\u00e0ng h\u1ea3i, ki\u1ebfn tr\u00fac<\/td><\/tr><\/tbody><\/table><\/figure>

        Lo\u1ea1i n\u00e0o t\u1ed1t h\u01a1n, 904L hay 316L?<\/h3>

        904L th\u01b0\u1eddng t\u1ed1t h\u01a1n 316L v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t nh\u01b0 ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u00e0ng h\u1ea3i ho\u1eb7c h\u00f3a ch\u1ea5t. Tuy nhi\u00ean, 316L \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn h\u01a1n v\u00e0 \u00edt t\u1ed1n k\u00e9m h\u01a1n.<\/p>

        Nh\u1eefng g\u00ec b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 quan t\u00e2m<\/h2>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng?<\/h3>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 \u0103n m\u00f2n cao, nh\u01b0ng trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t, n\u00f3 v\u1eabn c\u00f3 th\u1ec3 b\u1ecb g\u1ec9 theo th\u1eddi gian.<\/p>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h3>

        Kh\u00f4ng, th\u00e9p kh\u00f4ng g\u1ec9 904L n\u00f3i chung kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh.<\/p>

        \u0110\u1ecdc li\u00ean quan<\/strong>
        <\/strong>Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/a><\/p>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng tr\u1ea7y x\u01b0\u1edbc t\u1ed1t h\u01a1n kh\u00f4ng?<\/h3>

        C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng tr\u1ea7y x\u01b0\u1edbc t\u1ed1t h\u01a1n so v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 th\u00f4ng th\u01b0\u1eddng do h\u00e0m l\u01b0\u1ee3ng niken v\u00e0 crom cao h\u01a1n, nh\u01b0ng kh\u00f4ng ho\u00e0n to\u00e0n ch\u1ed1ng tr\u1ea7y x\u01b0\u1edbc.<\/p>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 t\u1ed1t cho \u0111\u1ed3ng h\u1ed3 kh\u00f4ng?<\/h3>

        C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 904L r\u1ea5t tuy\u1ec7t v\u1eddi cho \u0111\u1ed3ng h\u1ed3 v\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n cao, \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 b\u00f3ng. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed3ng h\u1ed3 cao c\u1ea5p.<\/p>

        Th\u00e9p kh\u00f4ng g\u1ec9 904L c\u00f3 \u0111\u1eaft kh\u00f4ng?<\/h3>

        C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 904L \u0111\u1eaft h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c do c\u00f3 h\u00e0m l\u01b0\u1ee3ng niken v\u00e0 molypden cao, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n tuy\u1ec7t v\u1eddi.<\/p>

        T\u00f3m t\u1eaft & Th\u00eam n\u1eefa<\/h2>

        B\u00e0i vi\u1ebft n\u00e0y t\u00f3m t\u1eaft ng\u1eafn g\u1ecdn v\u1ec1 904L v\u00e0 th\u1ea3o lu\u1eadn v\u1ec1 th\u00e0nh ph\u1ea7n, t\u00ednh ch\u1ea5t, qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng kh\u00e1c c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 904L. \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c c\u00e1c lo\u1ea1i th\u00e9p kh\u00e1c, h\u00e3y xem blog c\u1ee7a ch\u00fang t\u00f4i<\/a> ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi c\u00e1c chuy\u00ean gia kim lo\u1ea1i c\u1ee7a ch\u00fang t\u00f4i<\/a>.<\/p>

        L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 cung c\u1ea5p gi\u1ea3i ph\u00e1p h\u00e0ng \u0111\u1ea7u v\u1ec1 th\u00e9p chuy\u00ean d\u1ee5ng, SteelPRO cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u1ee9ng d\u1ee5ng \u0111a ng\u00e0nh v\u00e0 d\u1ecbch v\u1ee5 t\u00f9y ch\u1ec9nh. Ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m 100% v\u00e0 cam k\u1ebft ph\u00e1t tri\u1ec3n c\u00f9ng v\u1edbi kh\u00e1ch h\u00e0ng. Truy c\u1eadp trang web c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 t\u00ecm hi\u1ec3u th\u00eam, ho\u1eb7c g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t y\u00eau c\u1ea7u<\/a>. Ch\u00fang t\u00f4i s\u1ebd li\u00ean h\u1ec7 v\u1edbi b\u1ea1n s\u1edbm nh\u1ea5t!<\/p>","protected":false},"excerpt":{"rendered":"

        Overview of 904L Stainless Steel 904L (UNS N08904) stainless steel is a super austenitic stainless steel, mainly composed of 19-23% […]<\/p>","protected":false},"author":1,"featured_media":11750,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","rank_math_lock_modified_date":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4191,112],"tags":[],"class_list":["post-11748","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grades","category-stainless-steel"],"acf":[],"_links":{"self":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/11748","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/comments?post=11748"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/11748\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/11750"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=11748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=11748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=11748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}