{"id":20051,"date":"2024-12-24T08:21:00","date_gmt":"2024-12-24T00:21:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=20051"},"modified":"2025-01-14T14:26:25","modified_gmt":"2025-01-14T06:26:25","slug":"m4","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/tool-steel\/grades\/m4\/","title":{"rendered":"Th\u00e9p c\u00f4ng c\u1ee5 t\u1ed1c \u0111\u1ed9 cao M4: T\u00ednh ch\u1ea5t, quy tr\u00ecnh, c\u00f4ng d\u1ee5ng"},"content":{"rendered":"<p>Th\u00e9p c\u00f4ng c\u1ee5 M4 l\u00e0 v\u1eadt li\u1ec7u quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u00f2i h\u1ecfi c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft hi\u1ec7u su\u1ea5t cao. T\u1ea1i SteelPro Group, ch\u00fang t\u00f4i t\u1eadp trung v\u00e0o vi\u1ec7c cung c\u1ea5p lo\u1ea1i th\u00e9p t\u1ed1c \u0111\u1ed9 cao n\u00e0y \u1edf d\u1ea1ng t\u1ed1t nh\u1ea5t, bao g\u1ed3m c\u1ea3 PM M4 ti\u00ean ti\u1ebfn. Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, ch\u00fang t\u00f4i s\u1ebd \u0111i s\u00e2u v\u00e0o th\u00e9p c\u00f4ng c\u1ee5 M4, gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1ed1t nh\u1ea5t.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 M4 l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 W4 l\u00e0 th\u00e9p t\u1ed1c \u0111\u1ed9 cao (HSS) \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n tuy\u1ec7t v\u1eddi, \u0111\u1ed9 c\u1ee9ng cao v\u00e0 kh\u1ea3 n\u0103ng duy tr\u00ec hi\u1ec7u su\u1ea5t c\u1eaft \u1edf nhi\u1ec7t \u0111\u1ed9 cao. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft, m\u0169i khoan v\u00e0 v\u00f2i trong c\u00e1c \u1ee9ng d\u1ee5ng gia c\u00f4ng t\u1ed1c \u0111\u1ed9 cao. So v\u1edbi c\u00e1c lo\u1ea1i HSS kh\u00e1c nh\u01b0 M2, W4 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 duy tr\u00ec \u0111\u1ed9 c\u1ee9ng v\u01b0\u1ee3t tr\u1ed9i nh\u01b0ng \u0111\u1ed9 d\u1ebbo dai th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat.<\/p><p>Th\u00e9p c\u00f4ng c\u1ee5 M4 th\u00f4ng th\u01b0\u1eddng d\u1ec5 b\u1ecb m\u00e0i m\u00f2n d\u1ee5ng c\u1ee5 v\u00e0 b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n k\u00e9m khi \u1ee7, v\u00e0 tr\u1edf n\u00ean gi\u00f2n sau khi t\u00f4i. Tuy nhi\u00ean, PM M4, \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o th\u00f4ng qua luy\u1ec7n kim b\u1ed9t, c\u00f3 c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n v\u00e0 \u0111\u1ed9 c\u1ee9ng nh\u1ea5t qu\u00e1n. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m m\u00e0i m\u00f2n, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng gia c\u00f4ng v\u00e0 duy tr\u00ec \u0111\u1ed9 d\u1ebbo dai \u1edf tr\u1ea1ng th\u00e1i t\u00f4i.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 M4 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1i g\u00ec?<\/h2><p>Sau \u0111\u00e2y l\u00e0 th\u00f4ng tin t\u01b0\u01a1ng \u0111\u01b0\u01a1ng cho th\u00e9p c\u00f4ng c\u1ee5 M4:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Ti\u00eau chu\u1ea9n\/H\u1ec7 th\u1ed1ng<\/strong><\/td><td><strong>L\u1edbp t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ASTM A681, A600<\/td><td>M4<\/td><\/tr><tr><td>QQ-T-59<\/td><td>M4<\/td><\/tr><tr><td>\u0110\u1ea0I H\u1eccC<\/td><td>1.3343<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ISO 4957<\/td><td>X20CrWMoV 12 1<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n Nh\u1eadt B\u1ea3n<\/td><td>SKH51<\/td><\/tr><tr><td>Anh<\/td><td>W18Cr4V<\/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 M4&nbsp;<\/h2><p>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a M4 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 c\u1ee9ng cao, kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t. H\u00e0m l\u01b0\u1ee3ng vonfram, molypden v\u00e0 vanadi t\u0103ng c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n, trong khi crom v\u00e0 carbon c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ed5ng th\u1ec3.&nbsp;<\/p><p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y hi\u1ec3n th\u1ecb th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc chi ti\u1ebft c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 M4.<\/p><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>1.25 &#8211; 1.4 %<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>3.75 &#8211; 4.75 %<\/td><\/tr><tr><td>\u0110\u1ed3ng (Cu)<\/td><td>\u2264 0,25 %<\/td><\/tr><tr><td>S\u1eaft (Fe)<\/td><td>75.9 &#8211; 81.4 %<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>0.15 &#8211; 0.40 %<\/td><\/tr><tr><td>Molip\u0111en (Mo)<\/td><td>4.25 &#8211; 5.5 %<\/td><\/tr><tr><td>Niken (Ni)<\/td><td>\u2264 0,30 %<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>\u2264 0,030 %<\/td><\/tr><tr><td>Silic (Si)<\/td><td>0.20 &#8211; 0.45 %<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>\u2264 0,030 %<\/td><\/tr><tr><td>Vonfram (W)<\/td><td>5.25 &#8211; 6.5 %<\/td><\/tr><tr><td>Vanadi (V)<\/td><td>3.75 &#8211; 4.5 %<\/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 M4<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 M4 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 m\u1eadt \u0111\u1ed9 cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng gi\u00e3n n\u1edf nhi\u1ec7t m\u1ea1nh, gi\u00fap \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i. \u0110\u1ed9 d\u1eabn nhi\u1ec7t tuy\u1ec7t v\u1eddi c\u1ee7a n\u00f3 \u0111\u1ea3m b\u1ea3o t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3, trong khi nhi\u1ec7t dung ri\u00eang c\u1ee7a n\u00f3 h\u1ed7 tr\u1ee3 hi\u1ec7u su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao.&nbsp;<\/p><p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y tr\u00ecnh b\u00e0y c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd chi ti\u1ebft c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 M4.<\/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>T\u1ec9 tr\u1ecdng<\/td><td>7,8g\/cm\u00b3<\/td><td>0,282 lb\/in\u00b3<\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td><td>1410 \u2013 1450\u00b0C<\/td><td>2570 \u2013 2642\u00b0F<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>27 W\/m\u00b7K<\/td><td>19,0 BTU\u00b7ft\/gi\u1edd\u00b7\u00b0F\u00b7ft\u00b2<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang<\/td><td>0,46 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 \u00b5in\/in\u00b7\u00b0F<\/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 M4\u00a0<\/h2><p>Th\u00e9p c\u00f4ng c\u1ee5 M4 c\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o tuy\u1ec7t v\u1eddi, gi\u00fap ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 bi\u1ebfn d\u1ea1ng cao. Kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c v\u00e0 va \u0111\u1eadp l\u1edbn \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i, trong khi \u0111\u1ed9 c\u1ee9ng gi\u00fap duy tr\u00ec h\u00ecnh d\u1ea1ng khi ch\u1ecbu t\u1ea3i.&nbsp;<\/p><p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y tr\u00ecnh b\u00e0y c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc chi ti\u1ebft c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 M4.<\/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>62 \u2013 64HRC<\/td><td>62 \u2013 64HRC<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>2100 \u2013 2500MPa<\/td><td>305 \u2013 363 ksi<\/td><\/tr><tr><td>S\u1ee9c ch\u1ecbu l\u1ef1c<\/td><td>1700 \u2013 2100MPa<\/td><td>246 \u2013 305 ksi<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i<\/td><td>8 &#8211; 12 %<\/td><td>8 &#8211; 12 %<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>210 GPa<\/td><td>30,5 x 10\u2076 psi<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp (Charpy)<\/td><td>20 \u2013 30J<\/td><td>15 \u2013 22 ft-lb<\/td><\/tr><tr><td>T\u1ef7 s\u1ed1 Poisson<\/td><td>0.27 &#8211; 0.30<\/td><td>0.27 &#8211; 0.30<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t th\u00e9p c\u00f4ng c\u1ee5 M4<\/h2><p>SteelPro Group \u0111\u1ea3m b\u1ea3o ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u1ed1c \u0111\u1ed9 l\u00e0m ngu\u1ed9i ch\u00ednh x\u00e1c trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t th\u00e9p c\u00f4ng c\u1ee5 M4. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c ti\u00eau chu\u1ea9n, cung c\u1ea5p c\u00e1c s\u1ea3n ph\u1ea9m th\u00e9p c\u00f4ng c\u1ee5 M4 v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ed3ng nh\u1ea5t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t chi ti\u1ebft cho th\u00e9p c\u00f4ng c\u1ee5 M4.<\/p><h3 class=\"wp-block-heading\">\u1ee6<\/h3><p>\u1ee6 l\u00e0 quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3i ph\u00f3ng \u1ee9ng su\u1ea5t b\u00ean trong th\u00e9p, l\u00e0m cho th\u00e9p d\u1ec5 gia c\u00f4ng h\u01a1n. N\u00f3 \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch sau khi r\u00e8n, \u0111\u00fac ho\u1eb7c h\u00e0n. Sau khi \u1ee7, \u0111\u1ed9 c\u1ee9ng c\u00f3 th\u1ec3 \u0111\u1ea1t kho\u1ea3ng 240-255 HB.<\/p><p><strong>Qu\u00e1 tr\u00ecnh<\/strong>: L\u00e0m n\u00f3ng M4 \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 850-900\u00b0C (1.562-1.652\u00b0F) v\u00e0 gi\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3 trong 1 gi\u1edd cho m\u1ed7i 25,44 cm (1 in). Sau \u0111\u00f3, l\u00e0m ngu\u1ed9i t\u1eeb t\u1eeb th\u00e9p trong l\u00f2 v\u1edbi t\u1ed1c \u0111\u1ed9 kho\u1ea3ng 20\u00b0C (36\u00b0F) m\u1ed7i gi\u1edd.<\/p><h3 class=\"wp-block-heading\">L\u00e0m c\u1ee9ng<\/h3><h4 class=\"wp-block-heading\">L\u00e0m n\u00f3ng tr\u01b0\u1edbc<\/h4><p>N\u00ean l\u00e0m n\u00f3ng tr\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3m s\u1ed1c nhi\u1ec7t. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ee5ng c\u1ee5 c\u00f3 h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p, n\u00ean l\u00e0m n\u00f3ng tr\u01b0\u1edbc theo hai giai \u0111o\u1ea1n \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9:<\/p><ul class=\"wp-block-list\"><li>Giai \u0111o\u1ea1n \u0111\u1ea7u ti\u00ean: 500\u2013600\u00b0C (932\u20131,112\u00b0F)<\/li>\n\n<li>Giai \u0111o\u1ea1n th\u1ee9 hai: 800\u2013900\u00b0C (1.472\u20131.652\u00b0F)<\/li><\/ul><h4 class=\"wp-block-heading\">Austenit h\u00f3a<\/h4><p>L\u00e0m n\u00f3ng th\u00e9p c\u00f4ng c\u1ee5 M4 \u0111\u1ebfn 1.200\u20131.250\u00b0C (2.192\u20132.282\u00b0F). Ng\u00e2m trong 30-45 ph\u00fat cho m\u1ed7i \u0111\u1ed9 d\u00e0y 25,44 cm (1 in).<\/p><h4 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i<\/h4><p>Sau khi austenit h\u00f3a, th\u00e9p c\u00f4ng c\u1ee5 M4 ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m ngu\u1ed9i nhanh (l\u00e0m ngu\u1ed9i) \u0111\u1ec3 kh\u00f3a \u0111\u1ed9 c\u1ee9ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong d\u1ea7u \u0111\u1ec3 c\u00f3 \u0111\u1ed9 c\u1ee9ng cao h\u01a1n v\u00e0 c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n ho\u1eb7c trong kh\u00f4ng kh\u00ed \u0111\u1ec3 gi\u1ea3m bi\u1ebfn d\u1ea1ng v\u00e0 \u00edt nguy c\u01a1 n\u1ee9t h\u01a1n.&nbsp;<\/p><h3 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i<\/h3><p>Qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m \u0111\u1ed9 gi\u00f2n do t\u00f4i luy\u1ec7n v\u00e0 c\u00e2n b\u1eb1ng \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 dai. Sau khi t\u00f4i luy\u1ec7n, ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng th\u01b0\u1eddng l\u00e0 58-62 HRC.<\/p><p>Qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 540-650\u00b0C (1.004-1.202\u00b0F), v\u1edbi quy tr\u00ecnh t\u00f4i luy\u1ec7n k\u00e9p \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u1edf nhi\u1ec7t \u0111\u1ed9 600\u2013650\u00b0C (1.112\u20131.202\u00b0F) \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 t\u1ed1i \u01b0u.<\/p><h2 class=\"wp-block-heading\">H\u00ecnh d\u1ea1ng s\u1ea3n ph\u1ea9m th\u00e9p c\u00f4ng c\u1ee5 M4<\/h2><p>S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 ASTM v\u00e0 ISO, v\u00e0 ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p c\u00e1c t\u00f9y ch\u1ecdn k\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh. N\u1ebfu b\u1ea1n y\u00eau c\u1ea7u c\u00e1c thanh \u0111\u00e3 t\u00f4i c\u1ee9ng ho\u1eb7c \u1ee7 v\u1edbi \u0111\u1ed9 c\u1ee9ng c\u1ee5 th\u1ec3, vui l\u00f2ng li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 c\u00f3 c\u00e1c gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh.<\/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 (Anh)<\/strong><\/td><\/tr><tr><td rowspan=\"2\">Thanh tr\u00f2n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 10 mm \u0111\u1ebfn 100 mm<\/td><td>\u0110\u01b0\u1eddng k\u00ednh: 0,39 in \u0111\u1ebfn 3,94 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 1000 mm \u0111\u1ebfn 3000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 39,37 in \u0111\u1ebfn 118,11 in<\/td><\/tr><tr><td rowspan=\"3\">Thanh ph\u1eb3ng<\/td><td>\u0110\u1ed9 d\u00e0y: 5 mm \u0111\u1ebfn 50 mm<\/td><td>\u0110\u1ed9 d\u00e0y: 0,20 in \u0111\u1ebfn 1,97 in<\/td><\/tr><tr><td>Chi\u1ec1u r\u1ed9ng: 20 mm \u0111\u1ebfn 200 mm<\/td><td>Chi\u1ec1u r\u1ed9ng: 0,79 in \u0111\u1ebfn 7,87 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 1000 mm \u0111\u1ebfn 3000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 39,37 in \u0111\u1ebfn 118,11 in<\/td><\/tr><tr><td rowspan=\"3\">\u0110\u0129a<\/td><td>\u0110\u1ed9 d\u00e0y: 10 mm \u0111\u1ebfn 50 mm<\/td><td>\u0110\u1ed9 d\u00e0y: 0,39 in \u0111\u1ebfn 1,97 in<\/td><\/tr><tr><td>Chi\u1ec1u r\u1ed9ng: 200 mm \u0111\u1ebfn 1500 mm<\/td><td>Chi\u1ec1u r\u1ed9ng: 7,87 in \u0111\u1ebfn 59,06 in<\/td><\/tr><tr><td>Chi\u1ec1u d\u00e0i: 1000 mm \u0111\u1ebfn 3000 mm<\/td><td>Chi\u1ec1u d\u00e0i: 39,37 in \u0111\u1ebfn 118,11 in<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng th\u00e9p c\u00f4ng c\u1ee5 M4<\/h2><ul class=\"wp-block-list\"><li>L\u01b0\u1ee1i dao: L\u01b0\u1ee1i c\u01b0a tr\u00f2n, Dao gia c\u00f4ng kim lo\u1ea1i<\/li>\n\n<li>Doa: D\u1ee5ng c\u1ee5 doa b\u00ean trong, D\u1ee5ng c\u1ee5 doa b\u1ec1 m\u1eb7t<\/li>\n\n<li>Dao phay b\u00e1nh r\u0103ng: Dao phay b\u00e1nh r\u0103ng th\u1eb3ng v\u00e0 xo\u1eafn \u1ed1c, Dao phay b\u00e1nh r\u0103ng trong<\/li>\n\n<li>Con l\u0103n ren: Con l\u0103n ren \u0111\u1ecbnh h\u00ecnh ngu\u1ed9i cho bu l\u00f4ng v\u00e0 \u1ed1c v\u00edt<\/li>\n\n<li>Dao phay: Dao phay \u0111\u1ea7u, Dao phay m\u1eb7t<\/li>\n\n<li>M\u00e1y c\u1eaft \u0111\u1ecbnh h\u00ecnh: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh c\u00e1c b\u1ed9 ph\u1eadn v\u00e0 linh ki\u1ec7n kim lo\u1ea1i<\/li>\n\n<li>Dao c\u1eaft c\u1ea1o r\u00e2u: D\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c \u0111\u1ec3 ho\u00e0n thi\u1ec7n b\u00e1nh r\u0103ng v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c<\/li><\/ul><p><a href=\"https:\/\/steelprogroup.com\/vi\/tool-steel\/grades\/cpm-m4\/\">Th\u00e9p PM M4 (ho\u1eb7c th\u00e9p CPM M4)<\/a> \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng quy tr\u00ecnh luy\u1ec7n kim b\u1ed9t mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n, \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n. Nh\u1eefng \u0111\u1eb7c t\u00ednh n\u00e2ng cao n\u00e0y l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng gia c\u00f4ng ph\u1ee9c t\u1ea1p, \u1ee9ng su\u1ea5t cao.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p c\u00f4ng c\u1ee5 M4 cho hi\u1ec7u su\u1ea5t cao nh\u1ea5t<\/h2><p>T\u1ea1i SteelPro Group, ch\u00fang t\u00f4i cung c\u1ea5p M4 v\u00e0 <a href=\"https:\/\/steelprogroup.com\/vi\/tool-steel\/w18cr4v\/\">th\u00e9p c\u00f4ng c\u1ee5 t\u1ed1c \u0111\u1ed9 cao kh\u00e1c<\/a> v\u1edbi nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau, t\u1eeb thanh \u0111\u1ebfn c\u00e1c c\u1ea5u h\u00ecnh t\u00f9y ch\u1ec9nh, ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u gia c\u00f4ng c\u1ee7a b\u1ea1n. V\u1edbi d\u1ecbch v\u1ee5 c\u1eaft ch\u00ednh x\u00e1c v\u00e0 x\u1eed l\u00fd nhi\u1ec7t, ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi s\u1ea3n ph\u1ea9m \u0111\u1ec1u \u0111\u00e1p \u1ee9ng ch\u00ednh x\u00e1c c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>M4 Tool Steel is a critical material for industries requiring high-performance cutting tools. At SteelPro Group, we focus on providing [&hellip;]<\/p>","protected":false},"author":12,"featured_media":20040,"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-20051","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\/20051","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=20051"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20051\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/20040"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=20051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=20051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=20051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}