{"id":20046,"date":"2024-12-24T02:41:00","date_gmt":"2024-12-23T18:41:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=20046"},"modified":"2025-01-14T14:32:36","modified_gmt":"2025-01-14T06:32:36","slug":"h21","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/tool-steel\/grades\/h21\/","title":{"rendered":"Th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c n\u00f3ng H21: T\u00ednh ch\u1ea5t, quy tr\u00ecnh, \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>Th\u00e9p c\u00f4ng c\u1ee5 H21 cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p \u0111\u1ed9c \u0111\u00e1o gi\u1eefa kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao, \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng gia c\u00f4ng. N\u1ebfu b\u1ea1n c\u1ea7n m\u1ed9t v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t v\u00e0 mang l\u1ea1i hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe, H21 l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn ho\u00e0n h\u1ea3o.&nbsp;<\/p><p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh, quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t, ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf t\u1ea1o v\u00e0 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 H21, cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft c\u00f3 gi\u00e1 tr\u1ecb cho nh\u1eefng ai \u0111ang c\u00e2n nh\u1eafc v\u1eadt li\u1ec7u n\u00e0y cho nhu c\u1ea7u s\u1ea3n xu\u1ea5t c\u1ee7a m\u00ecnh.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 H21 l\u00e0 g\u00ec?<\/h2><p>H21 l\u00e0 th\u00e9p c\u00f4ng c\u1ee5 gia c\u00f4ng n\u00f3ng h\u1ee3p kim vonfram, c\u00f3 \u0111\u1ed9 b\u1ec1n nhi\u1ec7t v\u00e0 \u0111\u1ed9 d\u1ebbo dai tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 cao. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u00fac khu\u00f4n, \u0111\u00f9n v\u00e0 t\u1ea1o h\u00ecnh n\u00f3ng. Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c lo\u1ea1i vonfram cao h\u01a1n, H21 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t b\u1eb1ng d\u00f2ng n\u01b0\u1edbc li\u00ean t\u1ee5c. Tuy nhi\u00ean, so v\u1edbi th\u00e9p h\u1ee3p kim th\u1ea5p t\u00f4i n\u01b0\u1edbc, H21 c\u00f3 kh\u1ea3 n\u0103ng gia c\u00f4ng th\u1ea5p h\u01a1n.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 H21 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1i g\u00ec?<\/h2><p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i th\u00e9p c\u00f4ng c\u1ee5 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ph\u1ed5 bi\u1ebfn c\u1ee7a H21:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Ti\u00eau chu\u1ea9n<\/strong><\/td><td><strong>T\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/td><\/tr><tr><td>Anh<\/td><td>3Cr2W8V<\/td><\/tr><tr><td>\u0110\u1ea0I H\u1eccC<\/td><td>1.2581<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n Nh\u1eadt B\u1ea3n<\/td><td>SKD5<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ASTM<\/td><td>H21<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ISO<\/td><td>X30WCrV 9-3<\/td><\/tr><tr><td>Li\u00ean Hi\u1ec7p Qu\u1ed1c<\/td><td>T20821<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 H21&nbsp;<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 H21 l\u00e0 h\u1ee3p kim gia c\u00f4ng n\u00f3ng cao c\u1ea5p \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi s\u1ef1 k\u1ebft h\u1ee3p c\u00e2n b\u1eb1ng gi\u1eefa vonfram, crom v\u00e0 vanadi. H\u00e0m l\u01b0\u1ee3ng cacbon cao \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng ch\u1eafc ch\u1eafn, trong khi crom v\u00e0 vanadi c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi nhi\u1ec7t v\u00e0 m\u00e0i m\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 cao.&nbsp;<\/p><p>B\u1ea3ng sau \u0111\u00e2y hi\u1ec3n th\u1ecb th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 H21.<\/p><figure class=\"wp-block-table\"><table><thead><tr><th><strong>Y\u1ebfu t\u1ed1<\/strong><\/th><th><strong>N\u1ed9i dung (%)<\/strong><\/th><\/tr><tr><th>Cacbon (C)<\/th><th>0.3<\/th><\/tr><tr><th>Crom (Cr)<\/th><th>3.3<\/th><\/tr><tr><th>S\u1eaft (Fe)<\/th><th>86.5<\/th><\/tr><\/thead><tbody><tr><td>Mangan (Mn)<\/td><td>0.3<\/td><\/tr><tr><td>Silic (Si)<\/td><td>0.34<\/td><\/tr><tr><td>Vonfram (W)<\/td><td>9<\/td><\/tr><tr><td>Vanadi (V)<\/td><td>0.25<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 H21<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 H21 k\u1ebft h\u1ee3p \u0111\u1ed9 b\u1ec1n cao v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t, l\u00e0m cho n\u00f3 l\u00fd t\u01b0\u1edfng cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t. \u0110\u1ed9 gi\u00e3n n\u1edf th\u1ea5p v\u00e0 truy\u1ec1n nhi\u1ec7t hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3 l\u00e0m t\u0103ng tu\u1ed5i th\u1ecd c\u1ee7a n\u00f3 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea7y th\u00e1ch th\u1ee9c. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y cung c\u1ea5p t\u1ed5ng quan r\u00f5 r\u00e0ng v\u1ec1 c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a n\u00f3.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>H\u1ec7 m\u00e9t (SI)<\/strong><\/td><td><strong>\u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr><tr><td>T\u1ec9 tr\u1ecdng<\/td><td>8,19 g\/cc<\/td><td>0,296 lb\/in\u00b3<\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td><td>1450\u00b0C<\/td><td>2642\u00b0F<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>27,0 W\/m\u00b7K<\/td><td>187 BTU\u00b7in\/gi\u1edd\u00b7ft\u00b2\u00b7\u00b0F<\/td><\/tr><tr><td>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t (20\u2013100\u00b0C)<\/td><td>11,2 \u00b5m\/m\u00b7K<\/td><td>6,2 \u00b5in\/in\u00b7\u00b0F<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t<\/td><td>0,67 \u00b5\u03a9\u00b7m<\/td><td>0,67 \u00b5\u03a9\u00b7trong<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 H21\u00a0<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 H21 cung c\u1ea5p s\u1ef1 c\u00e2n b\u1eb1ng m\u1ea1nh m\u1ebd gi\u1eefa \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng n\u1eb7ng. T\u00ednh linh ho\u1ea1t c\u1ee7a n\u00f3 cho ph\u00e9p n\u00f3 duy tr\u00ec hi\u1ec7u su\u1ea5t trong nhi\u1ec1u ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u1ee9c \u0111\u1ed9 \u1ee9ng su\u1ea5t kh\u00e1c nhau. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y n\u00eau b\u1eadt c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc thi\u1ebft y\u1ebfu n\u00e0y.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>H\u1ec7 m\u00e9t<\/strong><\/td><td><strong>\u0110\u1ebf qu\u1ed1c<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (HRC)<\/td><td>40.0 &#8211; 55.0<\/td><td>40.0 &#8211; 55.0<\/td><\/tr><tr><td>M\u00f4 \u0111un kh\u1ed1i<\/td><td>160 GPa<\/td><td>23200 ksi<\/td><\/tr><tr><td>M\u00f4 \u0111un c\u1eaft<\/td><td>80,0 GPa<\/td><td>11600 ksi<\/td><\/tr><tr><td>T\u1ef7 s\u1ed1 Poisson (25\u00b0C)<\/td><td>0.27 &#8211; 0.30<\/td><td>0.27 &#8211; 0.30<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>190 \u2013 210 GPa<\/td><td>27557 \u2013 30458 ksi<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t th\u00e9p c\u00f4ng c\u1ee5 H21<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 H21 ho\u1ea1t \u0111\u1ed9ng c\u1ef1c k\u1ef3 t\u1ed1t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t, mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi nhi\u1ec7t m\u1ea1nh m\u1ebd v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao. Qu\u00e1 tr\u00ecnh kh\u1eed cacbon \u0111\u00fang c\u00e1ch v\u00e0 l\u00e0m m\u00e1t c\u00f3 ki\u1ec3m so\u00e1t l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 tr\u00e1nh \u0111\u00f3ng c\u1eb7n v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai t\u1ed1i \u01b0u. Khi x\u1eed l\u00fd nhi\u1ec7t \u0111\u00fang c\u00e1ch, n\u00f3 l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng gia c\u00f4ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p><p>N\u1ebfu b\u1ea1n \u0111ang c\u00e2n nh\u1eafc H21 \u0111\u00e3 qua x\u1eed l\u00fd nhi\u1ec7t, SteelPro Group cung c\u1ea5p s\u1ea3n ph\u1ea9m n\u00e0y \u1edf d\u1ea1ng \u1ee7, t\u00f4i ho\u1eb7c ram t\u1ed1t nh\u1ea5t c\u00f3 th\u1ec3, tu\u00e2n theo c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t nghi\u00eam ng\u1eb7t. C\u00e1c chuy\u00ean gia c\u1ee7a ch\u00fang t\u00f4i \u1edf \u0111\u00e2y \u0111\u1ec3 gi\u00fap b\u1ea1n t\u00ecm ra l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh.<\/p><h3 class=\"wp-block-heading\">\u1ee6<\/h3><p>\u0110i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t b\u00ean trong v\u00e0 t\u0103ng kh\u1ea3 n\u0103ng gia c\u00f4ng. T\u1ed1t nh\u1ea5t l\u00e0 th\u1ef1c hi\u1ec7n trong th\u00f9ng k\u00edn c\u00f3 h\u1ed7n h\u1ee3p th\u1ea5m cacbon th\u1ea3i ho\u1eb7c phoi gang \u0111\u1ec3 tr\u00e1nh \u0111\u00f3ng c\u1eb7n ho\u1eb7c kh\u1eed cacbon qu\u00e1 m\u1ee9c.<\/p><p>Quy tr\u00ecnh \u1ee7 bao g\u1ed3m nung th\u00e9p \u0111\u1ebfn 885\u00b0C (1625\u00b0F) v\u00e0 sau \u0111\u00f3 \u0111\u1ec3 ngu\u1ed9i d\u1ea7n v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00f4ng qu\u00e1 4\u00b0C (40\u00b0F) m\u1ed7i gi\u1edd. Sau quy tr\u00ecnh n\u00e0y, \u0111\u1ed9 c\u1ee9ng c\u1ee7a th\u00e9p s\u1ebd v\u00e0o kho\u1ea3ng 200 HB.<\/p><h3 class=\"wp-block-heading\">L\u00e0m c\u1ee9ng<\/h3><p>Tr\u01b0\u1edbc khi t\u00f4i, th\u00e9p H21 ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh x\u1eed l\u00fd kh\u1eed cacbon \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 h\u01b0 h\u1ecfng b\u1ec1 m\u1eb7t trong qu\u00e1 tr\u00ecnh n\u00e0y. B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch l\u00e0m n\u00f3ng tr\u01b0\u1edbc th\u00e9p \u0111\u1ebfn 816\u00b0C (1500\u00b0F), sau \u0111\u00f3 l\u00e0m n\u00f3ng nhanh \u0111\u1ebfn 1177\u00b0C (2150\u00b0F).<\/p><p>Gi\u1eef th\u00e9p \u1edf nhi\u1ec7t \u0111\u1ed9 n\u00e0y trong 2 \u0111\u1ebfn 5 ph\u00fat \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ph\u00e2n ph\u1ed1i nhi\u1ec7t \u0111\u1ed3ng \u0111\u1ec1u. Cu\u1ed1i c\u00f9ng, l\u00e0m ngu\u1ed9i th\u00e9p trong kh\u00f4ng kh\u00ed ho\u1eb7c d\u1ea7u \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 c\u1ee9ng mong mu\u1ed1n.<\/p><h3 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i<\/h3><p>Qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 gi\u1ea3m \u0111\u1ed9 gi\u00f2n v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 c\u1ee9ng. \u0110\u1ed1i v\u1edbi th\u00e9p H21, qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n n\u00ean di\u1ec5n ra \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 593\u00b0C \u0111\u1ebfn 677\u00b0C (1100\u00b0F \u0111\u1ebfn 1250\u00b0F). \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng Rockwell C t\u1eeb 54 \u0111\u1ebfn 36.<\/p><p>N\u00ean th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n k\u00e9p, m\u1ed7i chu k\u1ef3 k\u00e9o d\u00e0i 1 gi\u1edd \u1edf c\u00f9ng nhi\u1ec7t \u0111\u1ed9. \u0110i\u1ec1u n\u00e0y c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ebbo dai c\u1ee7a th\u00e9p v\u00e0 gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u1ec1 k\u00edch th\u01b0\u1edbc.<\/p><h2 class=\"wp-block-heading\">Ch\u1ebf t\u1ea1o th\u00e9p c\u00f4ng c\u1ee5 H21<\/h2><h3 class=\"wp-block-heading\">R\u00e8n<\/h3><p>Th\u00e9p c\u00f4ng c\u1ee5 H21 ph\u1ea3i \u0111\u01b0\u1ee3c r\u00e8n \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 1150\u00b0C (2100\u00b0F) \u0111\u1ebfn 927\u00b0C (1700\u00b0F), nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c d\u01b0\u1edbi 899\u00b0C (1650\u00b0F). R\u00e8n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n c\u00f3 th\u1ec3 g\u00e2y ra \u0111\u1ed9 c\u1ee9ng v\u00e0 gi\u00f2n qu\u00e1 m\u1ee9c, khi\u1ebfn th\u00e9p d\u1ec5 n\u1ee9t v\u00e0 kh\u00f3 \u0111\u1ecbnh h\u00ecnh.<\/p><h3 class=\"wp-block-heading\">H\u00ecnh th\u00e0nh<\/h3><p>Qu\u00e1 tr\u00ecnh t\u1ea1o h\u00ecnh ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 t\u1eeb 927\u00b0C (1700\u00b0F) \u0111\u1ebfn 1150\u00b0C (2100\u00b0F) \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 d\u1ebbo v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a v\u1eadt li\u1ec7u.<\/p><h3 class=\"wp-block-heading\">L\u00e0m vi\u1ec7c l\u1ea1nh<\/h3><p>L\u00e0m vi\u1ec7c ngu\u1ed9i c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u1ee7 \u1edf giai \u0111o\u1ea1n trung gian \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng c\u1ee9ng khi gia c\u00f4ng.<\/p><h3 class=\"wp-block-heading\">C\u1eaft<\/h3><p>S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n cao \u0111\u1ec3 c\u1eaft. Ch\u1ea5t l\u1ecfng gia nhi\u1ec7t v\u00e0 c\u1eaft th\u00edch h\u1ee3p l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3m ma s\u00e1t.<\/p><h3 class=\"wp-block-heading\">H\u00e0n<\/h3><p>L\u00e0m n\u00f3ng tr\u01b0\u1edbc t\u1edbi 300\u00b0C (572\u00b0F) tr\u01b0\u1edbc khi h\u00e0n. X\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n (PWHT) l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t.<\/p><h2 class=\"wp-block-heading\">H21 C\u00f4ng c\u1ee5 th\u00e9p s\u1ea3n ph\u1ea9m h\u00ecnh th\u1ee9c<\/h2><p>Ph\u1ea7n n\u00e0y ph\u00e1c th\u1ea3o c\u00e1c d\u1ea1ng s\u1ea3n ph\u1ea9m ph\u1ed5 bi\u1ebfn v\u00e0 ph\u1ea1m vi k\u00edch th\u01b0\u1edbc ti\u00eau bi\u1ec3u cho th\u00e9p c\u00f4ng c\u1ee5 H21. Ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh \u0111\u00e1p \u1ee9ng c\u00e1c dung sai nghi\u00eam ng\u1eb7t \u0111\u1ec3 c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ed3ng nh\u1ea5t. N\u1ebfu y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc c\u1ee7a b\u1ea1n n\u1eb1m ngo\u00e0i c\u00e1c ph\u1ea1m vi n\u00e0y ho\u1eb7c b\u1ea1n c\u1ea7n c\u00e1c h\u00ecnh d\u1ea1ng r\u00e8n t\u00f9y ch\u1ec9nh, h\u00e3y tho\u1ea3i m\u00e1i li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i. Ch\u00fang t\u00f4i s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3 v\u00e0 mong mu\u1ed1n cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh!<\/p><h3 class=\"wp-block-heading\">Thanh<\/h3><ul class=\"wp-block-list\"><li>\u0110\u01b0\u1eddng k\u00ednh: 10 mm \u0111\u1ebfn 500 mm (0,39 in \u0111\u1ebfn 19,69 in)<\/li>\n\n<li>Chi\u1ec1u d\u00e0i: 1000 mm \u0111\u1ebfn 4000 mm (39,37 in \u0111\u1ebfn 157,48 in)<\/li><\/ul><h3 class=\"wp-block-heading\">\u0110\u0129a<\/h3><ul class=\"wp-block-list\"><li>\u0110\u1ed9 d\u00e0y: 10 mm \u0111\u1ebfn 250 mm (0,39 in \u0111\u1ebfn 9,84 in)<\/li>\n\n<li>Chi\u1ec1u r\u1ed9ng: 100 mm \u0111\u1ebfn 1000 mm (3,94 in \u0111\u1ebfn 39,37 in)<\/li>\n\n<li>Chi\u1ec1u d\u00e0i: 2000 mm \u0111\u1ebfn 3000 mm (78,74 in \u0111\u1ebfn 118,11 in)<\/li><\/ul><h3 class=\"wp-block-heading\">V\u00f2ng tr\u00f2n<\/h3><ul class=\"wp-block-list\"><li>\u0110\u01b0\u1eddng k\u00ednh: 20 mm \u0111\u1ebfn 300 mm (0,79 in \u0111\u1ebfn 11,81 in)<\/li>\n\n<li>Chi\u1ec1u d\u00e0i: 2000 mm \u0111\u1ebfn 3000 mm (78,74 in \u0111\u1ebfn 118,11 in)<\/li><\/ul><h3 class=\"wp-block-heading\">Kh\u1ed1i<\/h3><ul class=\"wp-block-list\"><li>K\u00edch th\u01b0\u1edbc: 100 mm x 100 mm x 100 mm \u0111\u1ebfn 500 mm x 500 mm x 1000 mm (3,94 in x 3,94 in x 3,94 in \u0111\u1ebfn 19,69 in x 19,69 in x 39,37 in)<\/li><\/ul><h3 class=\"wp-block-heading\">H\u00ecnh d\u1ea1ng r\u00e8n<\/h3><ul class=\"wp-block-list\"><li>K\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng, th\u01b0\u1eddng c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 50 mm \u0111\u1ebfn 500 mm (1,97 in \u0111\u1ebfn 19,69 in).<\/li><\/ul><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng th\u00e9p c\u00f4ng c\u1ee5 H21<\/h2><p>T\u1ea1i SteelPRO, ch\u00fang t\u00f4i cung c\u1ea5p th\u00e9p c\u00f4ng c\u1ee5 H21 ch\u1ea5t l\u01b0\u1ee3ng cao cho nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t tin t\u01b0\u1edfng s\u1eed d\u1ee5ng trong c\u00e1c quy tr\u00ecnh sau:<\/p><ul class=\"wp-block-list\"><li><strong>Khu\u00f4n \u0111\u00fac khu\u00f4n<\/strong><\/li>\n\n<li><strong>Khu\u00f4n \u0111\u00f9n<\/strong><\/li>\n\n<li><strong>Khu\u00f4n r\u00e8n<\/strong><\/li>\n\n<li><strong>C\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c n\u00f3ng<\/strong> (ch\u1eb3ng h\u1ea1n nh\u01b0 l\u01b0\u1ee1i c\u1eaft n\u00f3ng v\u00e0 ch\u00e8n khu\u00f4n)<\/li>\n\n<li><strong>Khu\u00f4n nh\u1ef1a<\/strong> (d\u00e0nh cho nh\u1ef1a k\u1ef9 thu\u1eadt ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao)<\/li>\n\n<li><strong>C\u1eaft t\u1ec9a khu\u00f4n<\/strong><\/li>\n\n<li><strong>L\u01b0\u1ee1i c\u1eaft ph\u00f4i<\/strong><\/li>\n\n<li><strong>C\u01a1 s\u1edf khu\u00f4n cho \u0111\u00fac khu\u00f4n v\u00e0 \u00e9p phun<\/strong><\/li>\n\n<li><strong>Khu\u00f4n \u0111\u00fac ly t\u00e2m<\/strong><\/li><\/ul><h2 class=\"wp-block-heading\">Gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh cho th\u00e9p c\u00f4ng c\u1ee5 H21 t\u1ed1t nh\u1ea5t<\/h2><p>T\u1ea1i SteelPro, ch\u00fang t\u00f4i cung c\u1ea5p H21 v\u00e0 <a href=\"https:\/\/steelprogroup.com\/vi\/tool-steel\/h13\/\">H13<\/a> th\u00e9p c\u00f4ng c\u1ee5 \u1edf nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau, bao g\u1ed3m thanh, t\u1ea5m, tr\u00f2n v\u00e0 kh\u1ed1i, v\u1edbi k\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh c\u00f3 s\u1eb5n \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p d\u1ecbch v\u1ee5 gia c\u00f4ng ch\u00ednh x\u00e1c cho th\u00e9p c\u00f4ng c\u1ee5 H21, bao g\u1ed3m ti\u1ec7n, phay, m\u00e0i v\u00e0 khoan \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c c\u1ee7a b\u1ea1n.<\/p><p>Ngo\u00e0i ra, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd gi\u1ea3m \u1ee9ng su\u1ea5t v\u00e0 \u0111\u00f4ng l\u1ea1nh \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. Cho d\u00f9 l\u00e0 khu\u00f4n, d\u1ee5ng c\u1ee5 hay \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao, ch\u00fang t\u00f4i \u0111\u1ec1u cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady.<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Th\u00e9p c\u00f4ng c\u1ee5 H21 cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p \u0111\u1ed9c \u0111\u00e1o gi\u1eefa kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao, \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng gia c\u00f4ng. N\u1ebfu b\u1ea1n c\u1ea7n m\u1ed9t v\u1eadt li\u1ec7u [\u2026]<\/p>","protected":false},"author":12,"featured_media":20037,"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-20046","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\/20046","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\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/comments?post=20046"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20046\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/20037"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=20046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=20046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=20046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}