{"id":20161,"date":"2025-01-02T07:39:00","date_gmt":"2025-01-01T23:39:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=20161"},"modified":"2025-01-02T15:09:16","modified_gmt":"2025-01-02T07:09:16","slug":"1-2738","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/tool-steel\/grades\/1-2738\/","title":{"rendered":"P20Ni | 1.2738 | Th\u00e9p d\u1ee5ng c\u1ee5 P20+Ni cho khu\u00f4n nh\u1ef1a"},"content":{"rendered":"<p>SteelPro Group chuy\u00ean s\u1ea3n xu\u1ea5t Th\u00e9p c\u00f4ng c\u1ee5 ch\u1ea5t l\u01b0\u1ee3ng cao. Ph\u1ea1m vi c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m th\u00e9p 1.2738, thanh, t\u1ea5m v\u00e0 kh\u1ed1i c\u00e1n n\u00f3ng ho\u1eb7c r\u00e8n P20Ni. V\u1edbi nhi\u1ec1u n\u0103m kinh nghi\u1ec7m, ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 1.2738 l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p 1.2738 l\u00e0 th\u00e9p khu\u00f4n nh\u1ef1a. N\u00f3 ch\u1ee9a Cr-Ni-Mo l\u00e0m nguy\u00ean t\u1ed1 h\u1ee3p kim mang l\u1ea1i \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai v\u01b0\u1ee3t tr\u1ed9i. N\u00f3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi kh\u1ea3 n\u0103ng gia c\u00f4ng tuy\u1ec7t v\u1eddi, kh\u1ea3 n\u0103ng \u0111\u00e1nh b\u00f3ng v\u01b0\u1ee3t tr\u1ed9i v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n so v\u1edbi c\u00e1c lo\u1ea1i t\u01b0\u01a1ng t\u1ef1 nh\u01b0 1.2311. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c khu\u00f4n nh\u1ef1a l\u1edbn, kh\u1eafc s\u00e2u v\u00e0 khu\u00f4n ch\u1ecbu t\u00e1c \u0111\u1ed9ng m\u1ea1nh, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c v\u00f9ng l\u00f5i.<\/p><p>Ch\u00fang t\u00f4i cung c\u1ea5p th\u00e9p c\u00f4ng c\u1ee5 1.2738 \u1edf tr\u1ea1ng th\u00e1i \u0111\u00e3 t\u00f4i tr\u01b0\u1edbc v\u1edbi \u0111\u1ed9 c\u1ee9ng t\u1eeb 280 \u0111\u1ebfn 325 HB. Th\u00edch h\u1ee3p cho qu\u00e1 tr\u00ecnh th\u1ea5m nit\u01a1 v\u00e0 m\u1ea1 crom \u0111\u1ec3 t\u0103ng hi\u1ec7u su\u1ea5t.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 1,2738 l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p 1.2738, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 P20+Ni ho\u1eb7c P20Ni, c\u00f3 m\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch c\u00e1c ti\u00eau chu\u1ea9n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a n\u00f3:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Ti\u00eau chu\u1ea9n<\/strong><\/td><td><strong>L\u1edbp t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/td><\/tr><tr><td>Anh<\/td><td>3Cr2MnNiMo<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ASTM\/AISI<\/td><td>P20Ni<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ISO<\/td><td>40CrMnNiMo 8-6-4<\/td><\/tr><tr><td>\u0110\u1ea0I H\u1eccC<\/td><td>1.2738<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n Nh\u1eadt B\u1ea3n<\/td><td>Th\u00e9p PDS5S<\/td><\/tr><tr><td>ISC<\/td><td>T25553<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">1.2738 C\u00e1c s\u1ea3n ph\u1ea9m th\u00e9p c\u00f4ng c\u1ee5 v\u00e0 ph\u1ea1m vi cung c\u1ea5p<\/h2><p>Ch\u00fang t\u00f4i cung c\u1ea5p th\u00e9p 1.2738 d\u1ea1ng thanh, t\u1ea5m, kh\u1ed1i v\u00e0 tr\u00f2n v\u1edbi nhi\u1ec1u k\u00edch c\u1ee1 kh\u00e1c nhau, c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh k\u00edch th\u01b0\u1edbc. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 GB\/T 1299 v\u00e0 ASTM A681, \u0111\u1ea3m b\u1ea3o k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>M\u1eabu s\u1ea3n ph\u1ea9m<\/strong><\/td><td><strong>Ph\u1ea1m vi k\u00edch th\u01b0\u1edbc (H\u1ec7 m\u00e9t)<\/strong><\/td><td><strong>Ph\u1ea1m vi k\u00edch th\u01b0\u1edbc (H\u1ec7 m\u00e9t)<\/strong><\/td><\/tr><tr><td rowspan=\"2\">Thanh<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 20 mm \u0111\u1ebfn 500 mm<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 0,8 in \u0111\u1ebfn 20 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 3.000 mm \u0111\u1ebfn 6.000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 118 in \u0111\u1ebfn 236 in<\/td><\/tr><tr><td rowspan=\"3\">\u0110\u0129a<\/td><td>\u0110\u1ed9 d\u00e0y: 10 mm \u0111\u1ebfn 300 mm<\/td><td>\u0110\u1ed9 d\u00e0y: 0,4 in \u0111\u1ebfn 12 in<\/td><\/tr><tr><td>Chi\u1ec1u r\u1ed9ng: 200 mm \u0111\u1ebfn 2.500 mm<\/td><td>Chi\u1ec1u r\u1ed9ng: 8 in \u0111\u1ebfn 98 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 1.000 mm \u0111\u1ebfn 6.000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 39 in \u0111\u1ebfn 236 in<\/td><\/tr><tr><td rowspan=\"3\">Kh\u1ed1i<\/td><td>\u0110\u1ed9 d\u00e0y: 50 mm \u0111\u1ebfn 300 mm<\/td><td>\u0110\u1ed9 d\u00e0y: 2 in \u0111\u1ebfn 12 in<\/td><\/tr><tr><td>Chi\u1ec1u r\u1ed9ng: 200 mm \u0111\u1ebfn 1.500 mm<\/td><td>Chi\u1ec1u r\u1ed9ng: 8 in \u0111\u1ebfn 59 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 300 mm \u0111\u1ebfn 2.500 mm<\/td><td>Chi\u1ec1u d\u00e0i: 12 in \u0111\u1ebfn 98 in<\/td><\/tr><tr><td rowspan=\"2\">V\u00f2ng tr\u00f2n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 30 mm \u0111\u1ebfn 500 mm<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 1,2 in \u0111\u1ebfn 20 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 3.000 mm \u0111\u1ebfn 6.000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 118 in \u0111\u1ebfn 236 in<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">1.2738 Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>Th\u00e0nh ph\u1ea7n<\/strong><\/td><\/tr><tr><td>Cacbon (C)<\/td><td>0.35 &#8211; 0.45<\/td><\/tr><tr><td>Silic (Si)<\/td><td>0.2 &#8211; 0.4<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>1.3 &#8211; 1.6<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>\u22640,03<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>\u22640,03<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>1.8 &#8211; 2.1<\/td><\/tr><tr><td>Niken (Ni)<\/td><td>0.9 &#8211; 1.2<\/td><\/tr><tr><td>Molip\u0111en (Mo)<\/td><td>0.15 &#8211; 0.25<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">1.2738 T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb s\u1ed1 li\u1ec7u<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr><tr><td>T\u1ec9 tr\u1ecdng<\/td><td>7,85g\/cm\u00b3<\/td><td>0,284 lb\/in\u00b3<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>29,0 W\/m\u00b7K<\/td><td>16,78 BTU\u00b7in\/gi\u1edd\u00b7ft\u00b2\u00b7\u00b0F<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang<\/td><td>460 J\/kg\u00b7K<\/td><td>0,11 BTU\/lb\u00b7\u00b0F<\/td><\/tr><tr><td>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/td><td>11,5 \u00b5m\/m\u00b7K<\/td><td>6,39 x 10\u207b\u2076 in\/in\u00b7\u00b0F<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t<\/td><td>0,52 \u00b5\u03a9\u00b7cm<\/td><td>0,52 \u00b5\u03a9\u00b7trong<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">1.2738 T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb s\u1ed1 li\u1ec7u<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>750 \u2013 950MPa<\/td><td>108.000 \u2013 137.750 psi<\/td><\/tr><tr><td>S\u1ee9c ch\u1ecbu l\u1ef1c<\/td><td>500 \u2013 700MPa<\/td><td>72.500 \u2013 101.500 psi<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i khi \u0111\u1ee9t<\/td><td>\u226512%<\/td><td>\u226512%<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (\u1ee7 m\u1ec1m)<\/td><td>&lt;235 HB<\/td><td>&lt;235 HB<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (\u0111\u00e3 t\u00f4i luy\u1ec7n v\u00e0 t\u00f4i luy\u1ec7n)<\/td><td>&lt;51HRC<\/td><td>&lt;51HRC<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp (Charpy)<\/td><td>25 th\u00e1ng<\/td><td>18,5 ft\u00b7lbf<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>10,2 J\/mm\u00b3<\/td><td>0,18 ft\u00b7lbf\/in\u00b3<\/td><\/tr><tr><td>T\u1ef7 s\u1ed1 Poisson<\/td><td>0.28<\/td><td>0.28<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t th\u00e9p c\u00f4ng c\u1ee5 1.2738<\/h2><p>Ch\u00fang t\u00f4i cung c\u1ea5p th\u00e9p 1.2312 \u1edf tr\u1ea1ng th\u00e1i \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00f4i tr\u01b0\u1edbc, do \u0111\u00f3 th\u01b0\u1eddng kh\u00f4ng c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t b\u1ed5 sung. Tuy nhi\u00ean, n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng th\u00e9p n\u00e0y trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu \u1ee9ng su\u1ea5t cao ho\u1eb7c c\u1ea7n \u0111\u1ed9 c\u1ee9ng cao h\u01a1n, ch\u00fang t\u00f4i khuy\u00ean b\u1ea1n n\u00ean t\u00f4i ho\u1eb7c gi\u1ea3m \u1ee9ng su\u1ea5t \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t.<\/p><h3 class=\"wp-block-heading\">\u1ee6<\/h3><p>\u0110\u1ec3 l\u00e0m m\u1ec1m th\u00e9p 1.2312, h\u00e3y nung n\u00f3ng \u0111\u1ebfn kho\u1ea3ng 710\u00b0C \u0111\u1ebfn 740\u00b0C (1.310\u00b0F \u0111\u1ebfn 1.360\u00b0F) v\u00e0 gi\u1eef nguy\u00ean trong 1 gi\u1edd cho m\u1ed7i 25 mm (1 inch) \u0111\u1ed9 d\u00e0y. Sau \u0111\u00f3, \u0111\u1ec3 ngu\u1ed9i t\u1eeb t\u1eeb trong l\u00f2, v\u1edbi t\u1ed1c \u0111\u1ed9 10\u00b0C \u0111\u1ebfn 20\u00b0C (50\u00b0F \u0111\u1ebfn 70\u00b0F) m\u1ed7i gi\u1edd cho \u0111\u1ebfn khi \u0111\u1ea1t 600\u00b0C (1.110\u00b0F), sau \u0111\u00f3 \u0111\u1ec3 ngu\u1ed9i \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng ngo\u00e0i kh\u00f4ng kh\u00ed.<\/p><h3 class=\"wp-block-heading\">\u1ee6 gi\u1ea3m c\u0103ng th\u1eb3ng<\/h3><p>N\u1ebfu b\u1ea1n c\u1ea7n gi\u1ea3m \u1ee9ng su\u1ea5t b\u00ean trong, h\u00e3y nung th\u00e9p \u0111\u1ebfn 600\u00b0C (1.110\u00b0F) \u0111\u1ec3 \u1ee7 th\u01b0\u1eddng xuy\u00ean ho\u1eb7c 550\u00b0C (1.020\u00b0F) \u0111\u1ec3 t\u00f4i v\u00e0 ram. \u0110\u1ec3 \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3 trong 1 gi\u1edd cho m\u1ed7i 50 mm (2 inch) \u0111\u1ed9 d\u00e0y, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i t\u1eeb t\u1eeb trong l\u00f2.<\/p><h3 class=\"wp-block-heading\">L\u00e0m c\u1ee9ng<\/h3><ol class=\"wp-block-list\"><li><strong>L\u00e0m n\u00f3ng tr\u01b0\u1edbc<\/strong>:B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch nung n\u00f3ng th\u00e9p \u1edf nhi\u1ec7t \u0111\u1ed9 kho\u1ea3ng 450\u00b0C \u0111\u1ebfn 500\u00b0C (840\u00b0F \u0111\u1ebfn 930\u00b0F) trong 1 \u0111\u1ebfn 2 gi\u1edd.<\/li>\n\n<li><strong>Austenit h\u00f3a<\/strong>: Sau \u0111\u00f3, nung n\u00f3ng \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 850\u00b0C \u0111\u1ebfn 880\u00b0C (1.560\u00b0F \u0111\u1ebfn 1.620\u00b0F) cho qu\u00e1 tr\u00ecnh austenit h\u00f3a.<\/li>\n\n<li><strong>L\u00e0m ngu\u1ed9i<\/strong>: L\u00e0m ngu\u1ed9i th\u00e9p nhanh trong d\u1ea7u, n\u01b0\u1edbc ho\u1eb7c kh\u00f4ng kh\u00ed \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 180\u00b0C \u0111\u1ebfn 220\u00b0C (355\u00b0F \u0111\u1ebfn 430\u00b0F). Sau khi l\u00e0m ngu\u1ed9i, th\u00e9p s\u1ebd c\u00f3 \u0111\u1ed9 c\u1ee9ng kho\u1ea3ng 50 HRC.<\/li><\/ol><h3 class=\"wp-block-heading\">L\u00e0m c\u1ee9ng c\u1ea3m \u1ee9ng<\/h3><p>Th\u00e9p 1.2312 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f4i c\u1ea3m \u1ee9ng \u0111\u1ec3 t\u0103ng \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t l\u00ean \u0111\u1ebfn 55 HRC. Th\u00e9p \u0111\u01b0\u1ee3c nung n\u00f3ng \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 t\u1eeb 800\u00b0C \u0111\u1ebfn 850\u00b0C (1.470\u00b0F \u0111\u1ebfn 1.560\u00b0F) b\u1eb1ng cu\u1ed9n c\u1ea3m \u1ee9ng t\u1ea7n s\u1ed1 cao, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i nhanh b\u1eb1ng n\u01b0\u1edbc ho\u1eb7c kh\u00f4ng kh\u00ed.<\/p><p>Qu\u00e1 tr\u00ecnh n\u00e0y l\u00fd t\u01b0\u1edfng cho c\u00e1c b\u1ed9 ph\u1eadn \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n tr\u00ean b\u1ec1 m\u1eb7t, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c th\u00e0nh ph\u1ea7n d\u1ee5ng c\u1ee5 ho\u1eb7c tr\u1ee5c trong khi v\u1eabn duy tr\u00ec l\u00f5i c\u1ee9ng. Kh\u00f4ng gi\u1ed1ng nh\u01b0 qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n truy\u1ec1n th\u1ed1ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn to\u00e0n b\u1ed9 chi ti\u1ebft, qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n c\u1ea3m \u1ee9ng ch\u1ec9 nh\u1eafm v\u00e0o b\u1ec1 m\u1eb7t, mang l\u1ea1i \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 cao.<\/p><h3 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i<\/h3><p>Sau khi t\u00f4i, t\u00f4i th\u00e9p b\u1eb1ng c\u00e1ch nung n\u00f3ng \u0111\u1ebfn 180\u00b0C \u0111\u1ebfn 220\u00b0C (355\u00b0F \u0111\u1ebfn 430\u00b0F). Gi\u1eef nguy\u00ean nh\u01b0 v\u1eady trong 1 gi\u1edd cho m\u1ed7i 25 mm (1 inch) \u0111\u1ed9 d\u00e0y. T\u1ed1t nh\u1ea5t l\u00e0 t\u00f4i th\u00e9p hai l\u1ea7n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 \u0111\u1ec1u. Sau khi t\u00f4i, \u0111\u1ed9 c\u1ee9ng ph\u1ea3i v\u00e0o kho\u1ea3ng 280 \u0111\u1ebfn 330 HB&nbsp;<\/p><p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng hi\u1ec3n th\u1ecb \u0111\u1ed9 c\u1ee9ng c\u1ee7a th\u00e9p 1.2738 trong \u0111i\u1ec1u ki\u1ec7n t\u00f4i luy\u1ec7n \u1edf nhi\u1ec1u nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n kh\u00e1c nhau:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n (\u00b0C)<\/strong><\/td><td><strong>Nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n (\u00b0F)<\/strong><\/td><td><strong>\u0110\u1ed9 c\u1ee9ng (HRC)<\/strong><\/td><\/tr><tr><td>100\u00b0C<\/td><td>212\u00b0F<\/td><td>51,5 HRC<\/td><\/tr><tr><td>200\u00b0C<\/td><td>392\u00b0F<\/td><td>50,2 HRC<\/td><\/tr><tr><td>300\u00b0C<\/td><td>572\u00b0F<\/td><td>48 HRC<\/td><\/tr><tr><td>400\u00b0C<\/td><td>752\u00b0F<\/td><td>46,2 HRC<\/td><\/tr><tr><td>500\u00b0C<\/td><td>932\u00b0F<\/td><td>43 HRC<\/td><\/tr><tr><td>600\u00b0C<\/td><td>1.112\u00b0F<\/td><td>39 HRC<\/td><\/tr><tr><td>700\u00b0C<\/td><td>1.292\u00b0F<\/td><td>29 HRC<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">1.2738 \u1ee8ng d\u1ee5ng th\u00e9p c\u00f4ng c\u1ee5<\/h2><p>V\u1edbi kh\u1ea3 n\u0103ng gia c\u00f4ng v\u00e0 b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n tuy\u1ec7t v\u1eddi, 1.2738 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 s\u1ea3n xu\u1ea5t khu\u00f4n m\u1eabu \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 b\u1ec1n. C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a n\u00f3 bao g\u1ed3m:<\/p><ul class=\"wp-block-list\"><li><strong>Khu\u00f4n \u00e9p phun<\/strong>: D\u00f9ng cho c\u00e1c linh ki\u1ec7n nh\u1ef1a trong \u00f4 t\u00f4, \u0111i\u1ec7n t\u1eed v\u00e0 h\u00e0ng ti\u00eau d\u00f9ng.<\/li>\n\n<li><strong>Khu\u00f4n \u0111\u00fac khu\u00f4n<\/strong>: Th\u00edch h\u1ee3p cho vi\u1ec7c \u0111\u00fac h\u1ee3p kim nh\u00f4m, k\u1ebdm v\u00e0 magie.<\/li>\n\n<li><strong>Khu\u00f4n \u0111\u00f9n<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a, cao su v\u00e0 kim lo\u1ea1i.<\/li>\n\n<li><strong>Ch\u00e8n khu\u00f4n<\/strong>: D\u00f9ng cho l\u00f5i v\u00e0 khoang trong khu\u00f4n \u00e9p phun v\u00e0 khu\u00f4n n\u00e9n.<\/li><\/ul><h2 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p cho th\u00e9p c\u00f4ng c\u1ee5 1.2738<\/h2><p>T\u1ea1i SteelPRO Group, ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 gia c\u00f4ng chuy\u00ean nghi\u1ec7p cho Th\u00e9p c\u00f4ng c\u1ee5 1.2738, bao g\u1ed3m gia c\u00f4ng t\u00f9y ch\u1ec9nh, c\u1eaft, \u0111\u00e1nh b\u00f3ng v\u00e0 x\u1eed l\u00fd nhi\u1ec7t nh\u01b0 t\u00f4i v\u00e0 ram.&nbsp;<\/p><p>V\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kinh nghi\u1ec7m c\u1ee7a m\u00ecnh, ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o th\u00e9p c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho khu\u00f4n m\u1eabu v\u00e0 linh ki\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng cao. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p <a href=\"https:\/\/steelprogroup.com\/vi\/tool-steel\/h13\/\">1.2344 Th\u00e9p c\u00f4ng c\u1ee5<\/a> d\u00e0nh cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n.&nbsp;<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>SteelPro Group chuy\u00ean s\u1ea3n xu\u1ea5t Th\u00e9p c\u00f4ng c\u1ee5 ch\u1ea5t l\u01b0\u1ee3ng cao. Ph\u1ea1m vi c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m th\u00e9p 1.2738, thanh c\u00e1n n\u00f3ng ho\u1eb7c r\u00e8n P20Ni, [\u2026]<\/p>","protected":false},"author":1,"featured_media":20159,"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":[4294,4293],"tags":[],"class_list":["post-20161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grades-tool-steel","category-tool-steel"],"acf":[],"_links":{"self":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20161","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=20161"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20161\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/20159"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=20161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=20161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=20161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}