{"id":19876,"date":"2024-12-15T03:23:00","date_gmt":"2024-12-14T19:23:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=19876"},"modified":"2024-12-12T18:07:39","modified_gmt":"2024-12-12T10:07:39","slug":"d7","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/tool-steel\/grades\/d7\/","title":{"rendered":"Th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i D7: T\u00ednh ch\u1ea5t, ch\u1ebf t\u1ea1o, h\u00ecnh d\u1ea1ng v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Th\u00e9p c\u00f4ng c\u1ee5 gia c\u00f4ng ngu\u1ed9i D7 n\u1ed5i b\u1eadt trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n cao. \u0110\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi \u0111\u1ed9 c\u1ee9ng tuy\u1ec7t v\u1eddi sau khi x\u1eed l\u00fd nhi\u1ec7t, \u0111\u00e2y l\u00e0 v\u1eadt li\u1ec7u \u0111\u00e1ng tin c\u1eady cho c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft, khu\u00f4n v\u00e0 khu\u00f4n d\u1eadp. V\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n, D7 l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn ho\u00e0n h\u1ea3o cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u00f2i h\u1ecfi \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c \u0111\u1eb7c t\u00ednh ch\u00ednh, quy tr\u00ecnh ch\u1ebf t\u1ea1o v\u00e0 n\u01a1i th\u00e9p D7 th\u1ef1c s\u1ef1 t\u1ecfa s\u00e1ng trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p D7 l\u00e0 g\u00ec?<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p D7 l\u00e0 th\u00e9p c\u00f4ng c\u1ee5 c\u00f3 h\u00e0m l\u01b0\u1ee3ng cacbon cao, gi\u00e0u crom, c\u00f3 th\u1ec3 l\u00e0m c\u1ee9ng b\u1eb1ng kh\u00f4ng kh\u00ed, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i nh\u1edd th\u00e0nh ph\u1ea7n cacbon 2.0% v\u00e0 crom 12%. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i cho th\u00e9p \u0111\u1ed9 c\u1ee9ng v\u01b0\u1ee3t tr\u1ed9i (80-85 HRC sau khi x\u1eed l\u00fd nhi\u1ec7t). Th\u00e9p n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft, khu\u00f4n v\u00e0 khu\u00f4n \u0111\u00fac trong c\u00e1c \u1ee9ng d\u1ee5ng gia c\u00f4ng ngu\u1ed9i. Th\u00e9p D7 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng c\u00e1ch r\u00e8n v\u00e0 c\u00e1n v\u00e0 kh\u00f4ng c\u1ea7n l\u00e0m ngu\u1ed9i b\u1eb1ng d\u1ea7u ho\u1eb7c n\u01b0\u1edbc, khi\u1ebfn th\u00e9p n\u00e0y tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p c\u1ea7n c\u00e1c c\u00f4ng c\u1ee5 b\u1ec1n, l\u00e2u d\u00e0i.<\/p><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i D7<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i D7 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n, \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng tuy\u1ec7t v\u1eddi, ngay c\u1ea3 khi ch\u1ecbu \u1ee9ng su\u1ea5t cao. T\u00ednh ch\u1ea5t l\u00e0m c\u1ee9ng b\u1eb1ng kh\u00ed c\u1ee7a n\u00f3 gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh gia c\u00f4ng, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady trong c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft, khu\u00f4n v\u00e0 khu\u00f4n \u0111\u00fac.<\/p><h3 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p D7<\/h3><p class=\"wp-block-paragraph\">Sau \u0111\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p D7.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>N\u1ed9i dung (%)<\/strong><\/td><\/tr><tr><td>Cacbon, C<\/td><td>2<\/td><\/tr><tr><td>Mangan, Mn<\/td><td>0.3<\/td><\/tr><tr><td>Crom, Cr<\/td><td>12<\/td><\/tr><tr><td>Molypden, Mo<\/td><td>0.5<\/td><\/tr><tr><td>Vanadi, V<\/td><td>0.1<\/td><\/tr><tr><td>Silic, Si<\/td><td>0.25<\/td><\/tr><tr><td>Ph\u1ed1t pho, P<\/td><td>0.03<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh, S<\/td><td>0.03<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p D7<\/h3><p class=\"wp-block-paragraph\">Sau \u0111\u00e2y l\u00e0 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p D7.<\/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>Kh\u1ea3 n\u0103ng gia c\u00f4ng<\/td><td>T\u1ed1t<\/td><td>T\u1ed1t<\/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>Nhi\u1ec7t dung ri\u00eang<\/td><td>0,480 J\/g\u00b7\u00b0C<\/td><td>0,115 BTU\/lb\u00b7\u00b0F<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>25 W\/m\u00b7K<\/td><td>17,2 BTU\/gi\u1edd\u00b7ft\u00b7\u00b0F<\/td><\/tr><tr><td>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/td><td>11,2 \u00b5m\/m\u00b7\u00b0C<\/td><td>6,22 \u00b5in\/in\u00b7\u00b0F<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\"><strong>Kh\u1ea3 n\u0103ng gia c\u00f4ng<\/strong>:N\u00f3 kh\u00e1 d\u1ec5 gia c\u00f4ng, nh\u01b0ng \u0111\u1ed9 c\u1ee9ng c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u00f2i h\u1ecfi c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p><p class=\"wp-block-paragraph\"><strong>T\u1ec9 tr\u1ecdng<\/strong>:D7 c\u00f3 m\u1eadt \u0111\u1ed9 cao, gi\u00fap s\u1ea3n ph\u1ea9m b\u1ec1n nh\u01b0ng c\u0169ng t\u01b0\u01a1ng \u0111\u1ed1i n\u1eb7ng.<\/p><p class=\"wp-block-paragraph\"><strong>Nhi\u1ec7t dung ri\u00eang<\/strong>:D7 h\u1ea5p th\u1ee5 nhi\u1ec7t t\u1ed1t, gi\u00fap duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec1u nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau.<\/p><p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/strong>:N\u00f3 kh\u00f4ng t\u1ecfa nhi\u1ec7t nhanh, gi\u00fap duy tr\u00ec \u0111\u1ed9 b\u1ec1n nh\u01b0ng c\u00f3 th\u1ec3 c\u1ea7n l\u00e0m m\u00e1t trong m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh.<\/p><p class=\"wp-block-paragraph\"><strong>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/strong>:N\u00f3 gi\u00e3n n\u1edf v\u00e0 co l\u1ea1i li\u00ean t\u1ee5c, duy tr\u00ec \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc tuy\u1ec7t v\u1eddi khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/p><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p D7<\/h3><p class=\"wp-block-paragraph\">Sau \u0111\u00e2y l\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p D7.<\/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\u1ef7 s\u1ed1 Poisson<\/td><td>0.28<\/td><td>0.28<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (E)<\/td><td>210 GPa<\/td><td>30,5 \u00d7 10\u2076 psi<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>1200MPa<\/td><td>174.000 psi<\/td><\/tr><tr><td>S\u1ee9c ch\u1ecbu l\u1ef1c<\/td><td>1100MPa<\/td><td>160.000 psi<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp<\/td><td>30 th\u00e1ng<\/td><td>22 ft\u00b7lb<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i<\/td><td>5%<\/td><td>5%<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (Rockwell C)<\/td><td>58-62 HRC<\/td><td>58-62 HRC<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 b\u1ec1n ch\u1ea3y<\/strong>:V\u1edbi \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 b\u1ec1n ch\u1ea3y cao, D7 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c l\u1edbn m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y, do \u0111\u00f3 r\u1ea5t l\u00fd t\u01b0\u1edfng cho c\u00e1c d\u1ee5ng c\u1ee5 c\u1eaft v\u00e0 khu\u00f4n ph\u1ea3i ch\u1ecbu \u1ee9ng su\u1ea5t li\u00ean t\u1ee5c.<\/p><p class=\"wp-block-paragraph\"><strong>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i (210 GPa)<\/strong>: \u0110\u1ed9 c\u1ee9ng c\u1ee7a D7 \u0111\u1ea3m b\u1ea3o gi\u1eef nguy\u00ean h\u00ecnh d\u1ea1ng ngay c\u1ea3 khi ch\u1ecbu t\u1ea3i tr\u1ecdng cao, duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c trong gia c\u00f4ng v\u00e0 t\u1ea1o h\u00ecnh.<\/p><p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp (30 J)<\/strong>:M\u1eb7c d\u00f9 kh\u00f4ng ph\u1ea3i l\u00e0 lo\u1ea1i th\u00e9p c\u1ee9ng nh\u1ea5t, nh\u01b0ng D7 c\u00f3 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 l\u1ef1c va ch\u1ea1m v\u1eeba ph\u1ea3i m\u00e0 kh\u00f4ng b\u1ecb n\u1ee9t, ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 ki\u1ec3m so\u00e1t v\u00e0 ch\u1ecbu \u1ee9ng su\u1ea5t cao.<\/p><p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 c\u1ee9ng (58-62 HRC)<\/strong>:D7 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 m\u00e0i m\u00f2n t\u1ed1t, \u0111\u1ea3m b\u1ea3o tu\u1ed5i th\u1ecd d\u1ee5ng c\u1ee5 l\u00e2u d\u00e0i, m\u1eb7c d\u00f9 \u0111\u1ed9 c\u1ee9ng khi\u1ebfn d\u1ee5ng c\u1ee5 k\u00e9m linh ho\u1ea1t h\u01a1n.<\/p><p class=\"wp-block-paragraph\">D7 l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 b\u1ec1n cao, nh\u01b0ng c\u00e1c c\u1ea5p nh\u01b0 D2 ho\u1eb7c D6 trong c\u00f9ng m\u1ed9t d\u00e3y c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n v\u1ec1 \u0111\u1ed9 b\u1ec1n ho\u1eb7c kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp t\u1ed1t h\u01a1n.&nbsp;<\/p><h2 class=\"wp-block-heading\">Ch\u1ebf t\u1ea1o th\u00e9p c\u00e1n ngu\u1ed9i D7<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p D7 c\u1ee9ng v\u00e0 b\u1ec1n, l\u00fd t\u01b0\u1edfng cho c\u00e1c c\u00f4ng c\u1ee5 hi\u1ec7u su\u1ea5t cao. \u0110\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a n\u00f3, vi\u1ec7c ch\u1ebf t\u1ea1o \u0111\u00fang c\u00e1ch l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. Sau \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn nhanh v\u1ec1 c\u00e1c quy tr\u00ecnh ch\u00ednh c\u1ee7a n\u00f3:<\/p><h3 class=\"wp-block-heading\">R\u00e8n\/C\u00e1n<\/h3><p class=\"wp-block-paragraph\">\u0110\u1ec3 r\u00e8n ho\u1eb7c c\u00e1n D7, nung n\u00f3ng n\u00f3 \u0111\u1ebfn <strong>1000\u00b0C \u0111\u1ebfn 1200\u00b0C<\/strong> (1832\u00b0F \u0111\u1ebfn 2192\u00b0F). \u0110i\u1ec1u n\u00e0y gi\u00fap th\u00e9p d\u1ec5 gia c\u00f4ng h\u01a1n m\u00e0 kh\u00f4ng m\u1ea5t \u0111i \u0111\u1ed9 b\u1ec1n. Trong qu\u00e1 tr\u00ecnh r\u00e8n, h\u00e3y \u0111\u1ecbnh h\u00ecnh th\u00e9p c\u1ea9n th\u1eadn, gi\u1eef nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 tr\u00e1nh n\u1ee9t. Sau \u0111\u00f3, \u0111\u1ec3 ngu\u1ed9i t\u1eeb t\u1eeb \u0111\u1ec3 tinh ch\u1ec9nh c\u1ea5u tr\u00fac.<\/p><p class=\"wp-block-paragraph\">Khi c\u00e1n, cho th\u00e9p qua c\u00e1c con l\u0103n c\u00f3 c\u00f9ng ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9. \u0110\u1ec3 ngu\u1ed9i d\u1ea7n \u0111\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1ebbo dai.<\/p><h3 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t<\/h3><p class=\"wp-block-paragraph\">X\u1eed l\u00fd nhi\u1ec7t r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t c\u1ee7a D7:<\/p><p class=\"wp-block-paragraph\"><strong>\u1ee6<\/strong>: L\u00e0m n\u00f3ng D7 l\u00ean \u0111\u1ebfn 830\u00b0C \u0111\u1ebfn 880\u00b0C (1526\u00b0F \u0111\u1ebfn 1616\u00b0F) v\u00e0 \u0111\u1ec3 \u1edf \u0111\u00f3 trong 2-4 gi\u1edd, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i t\u1eeb t\u1eeb. B\u01b0\u1edbc n\u00e0y gi\u00fap gi\u1ea3m \u1ee9ng su\u1ea5t b\u00ean trong th\u00e9p, gi\u00fap d\u1ec5 gia c\u00f4ng h\u01a1n sau n\u00e0y.<\/p><p class=\"wp-block-paragraph\"><strong>L\u00e0m n\u00f3ng tr\u01b0\u1edbc<\/strong>: B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch l\u00e0m n\u00f3ng tr\u01b0\u1edbc theo hai giai \u0111o\u1ea1n\u2014\u0111\u1ea7u ti\u00ean, \u0111\u01b0a nhi\u1ec7t \u0111\u1ed9 l\u00ean 500\u00b0C \u0111\u1ebfn 600\u00b0C (932\u00b0F \u0111\u1ebfn 1112\u00b0F), sau \u0111\u00f3 t\u0103ng l\u00ean 800\u00b0C \u0111\u1ebfn 850\u00b0C (1472\u00b0F \u0111\u1ebfn 1562\u00b0F) tr\u01b0\u1edbc khi b\u1ea1n b\u1eaft \u0111\u1ea7u l\u00e0m ngu\u1ed9i. N\u00f3 gi\u00fap th\u00e9p s\u1eb5n s\u00e0ng cho b\u01b0\u1edbc ti\u1ebfp theo.<\/p><p class=\"wp-block-paragraph\"><strong>Austenit h\u00f3a<\/strong>: L\u00e0m n\u00f3ng D7 \u0111\u1ebfn 1000\u00b0C \u0111\u1ebfn 1050\u00b0C (1832\u00b0F \u0111\u1ebfn 1922\u00b0F) v\u00e0 gi\u1eef \u1edf \u0111\u00f3 trong 30-60 ph\u00fat \u0111\u1ec3 c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ed3ng \u0111\u1ec1u. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o th\u00e9p s\u1ebd c\u1ee9ng l\u1ea1i \u0111\u00fang c\u00e1ch.<\/p><p class=\"wp-block-paragraph\"><strong>L\u00e0m c\u1ee9ng<\/strong>: L\u00e0m ngu\u1ed9i D7 nhanh ch\u00f3ng\u2014trong d\u1ea7u ho\u1eb7c kh\u00f4ng kh\u00ed. \u0110i\u1ec1u n\u00e0y kh\u00f3a \u0111\u1ed9 c\u1ee9ng (nh\u1eafm \u0111\u1ebfn 58-62 HRC). L\u00e0m ngu\u1ed9i nhanh l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 l\u00e0m cho th\u00e9p c\u1ee9ng.<\/p><p class=\"wp-block-paragraph\"><strong>L\u00e0m ngu\u1ed9i<\/strong>: L\u00e0m ngu\u1ed9i th\u00e9p \u1edf nhi\u1ec7t \u0111\u1ed9 150\u00b0C \u0111\u1ebfn 200\u00b0C (302\u00b0F \u0111\u1ebfn 392\u00b0F) trong 2-3 gi\u1edd. \u0110i\u1ec1u n\u00e0y c\u00e2n b\u1eb1ng \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai, \u0111\u1ea3m b\u1ea3o th\u00e9p kh\u00f4ng qu\u00e1 gi\u00f2n.<\/p><p class=\"wp-block-paragraph\"><strong>L\u00e0m m\u00e1t v\u00e0 gi\u1ea3m c\u0103ng th\u1eb3ng<\/strong>: Sau khi t\u00f4i luy\u1ec7n, ch\u1ec9 c\u1ea7n \u0111\u1ec3 th\u00e9p ngu\u1ed9i t\u1ef1 nhi\u00ean trong kh\u00f4ng kh\u00ed t\u0129nh.<\/p><h3 class=\"wp-block-heading\">Gia c\u00f4ng<\/h3><p class=\"wp-block-paragraph\">D7 l\u00e0 lo\u1ea1i th\u00e9p c\u1ee9ng, c\u1ea7n gia c\u00f4ng c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh m\u00e0i m\u00f2n d\u1ee5ng c\u1ee5. C\u00e1c b\u01b0\u1edbc ch\u00ednh bao g\u1ed3m:<\/p><p class=\"wp-block-paragraph\"><strong>C\u1eaft<\/strong>: Khi gia c\u00f4ng D7, HSS ho\u1eb7c c\u00e1c c\u00f4ng c\u1ee5 carbide ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. Duy tr\u00ec t\u1ed1c \u0111\u1ed9 c\u1eaft \u1ed5n \u0111\u1ecbnh l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 tr\u00e1nh qu\u00e1 nhi\u1ec7t, c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 b\u1ec1 m\u1eb7t. S\u1eed d\u1ee5ng ch\u1ea5t b\u00f4i tr\u01a1n th\u00edch h\u1ee3p gi\u00fap gi\u1ea3m ma s\u00e1t v\u00e0 th\u1ef1c s\u1ef1 gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 c\u1ee7a b\u1ea1n.<\/p><p class=\"wp-block-paragraph\"><strong>X\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/strong>: \u0110\u1ed1i v\u1edbi x\u1eed l\u00fd b\u1ec1 m\u1eb7t, th\u1ea5m nit\u01a1 c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c l\u00e0m c\u1ee9ng b\u1ec1 m\u1eb7t m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t \u0111i \u0111\u1ed9 b\u1ec1n c\u1ee7a l\u00f5i. L\u1edbp ph\u1ee7 PVD, nh\u01b0 TiN, cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 b\u1ed5 sung ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0103n m\u00f2n, gi\u00fap d\u1ee5ng c\u1ee5 b\u1ec1n h\u01a1n v\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n.<\/p><h2 class=\"wp-block-heading\">H\u00ecnh d\u1ea1ng ch\u00fang t\u00f4i cung c\u1ea5p cho th\u00e9p l\u00e0m vi\u1ec7c ngu\u1ed9i D7<\/h2><p class=\"wp-block-paragraph\">Nh\u1edd kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n tuy\u1ec7t v\u1eddi, Th\u00e9p l\u00e0m vi\u1ec7c ngu\u1ed9i D7 c\u00f3 nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u kh\u00e1c nhau:<\/p><ul class=\"wp-block-list\"><li><strong>T\u1ea5m th\u00e9p D7<\/strong> \u2013 Th\u00edch h\u1ee3p cho vi\u1ec7c c\u1eaft khu\u00f4n, d\u1eadp v\u00e0 t\u1ea1o h\u00ecnh.<\/li>\n\n<li><strong>T\u1ea5m th\u00e9p D7<\/strong> \u2013 Ho\u00e0n h\u1ea3o cho s\u1ea3n xu\u1ea5t khu\u00f4n m\u1eabu v\u00e0 d\u1ee5ng c\u1ee5 quy m\u00f4 l\u1edbn.<\/li>\n\n<li><strong>Thanh th\u00e9p D7<\/strong> \u2013 Th\u00edch h\u1ee3p \u0111\u1ec3 gia c\u00f4ng th\u00e0nh c\u00e1c h\u00ecnh d\u1ea1ng t\u00f9y ch\u1ec9nh.<\/li>\n\n<li><strong>Thanh th\u00e9p D7<\/strong> \u2013 Th\u00edch h\u1ee3p \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 linh ki\u1ec7n ch\u00ednh x\u00e1c.<\/li>\n\n<li><strong>R\u00e8n th\u00e9p D7<\/strong> \u2013 Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 cao v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 h\u1ea1ng n\u1eb7ng.<\/li><\/ul><p class=\"wp-block-paragraph\">Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p nhi\u1ec1u h\u00ecnh d\u1ea1ng t\u00f9y ch\u1ec9nh theo y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i AISI D7<\/h2><p class=\"wp-block-paragraph\">Th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i AISI D7 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n cao. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c c\u00f4ng c\u1ee5 \u0111\u00e1ng tin c\u1eady v\u00e0 b\u1ec1n l\u00e2u:<\/p><ul class=\"wp-block-list\"><li><strong>C\u00f4ng c\u1ee5<\/strong>: D\u1ee5ng c\u1ee5 c\u1eaft khu\u00f4n, \u0111\u1ee5c l\u1ed7, khu\u00f4n \u0111\u1ecbnh h\u00ecnh, khu\u00f4n d\u1eadp<\/li>\n\n<li><strong>Khu\u00f4n m\u1eabu<\/strong>: Khu\u00f4n \u00e9p nh\u1ef1a, khu\u00f4n n\u00e9n, khu\u00f4n \u0111\u00f9n<\/li>\n\n<li><strong>D\u1ee5ng c\u1ee5 c\u1eaft<\/strong>: L\u01b0\u1ee1i dao, dao, c\u01b0a<\/li>\n\n<li><strong>H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5<\/strong>: C\u00e1c th\u00e0nh ph\u1ea7n c\u1ea5u tr\u00fac, c\u00f4ng c\u1ee5 ch\u00ednh x\u00e1c<\/li>\n\n<li><strong>\u00d4 t\u00f4<\/strong>: Khu\u00f4n d\u1eadp d\u00f9ng cho s\u1ea3n xu\u1ea5t linh ki\u1ec7n, d\u1ee5ng c\u1ee5 \u0111\u1ed9t d\u1eadp<\/li><\/ul><p class=\"wp-block-paragraph\">Th\u00e9p D7 l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c c\u00f4ng c\u1ee5 hi\u1ec7u su\u1ea5t cao trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p><h2 class=\"wp-block-heading\">Nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p c\u00f4ng c\u1ee5 l\u00e0m vi\u1ec7c ngu\u1ed9i D7<\/h2><p class=\"wp-block-paragraph\">L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p c\u00f4ng c\u1ee5 D7, ch\u00fang t\u00f4i chuy\u00ean cung c\u1ea5p nhi\u1ec1u h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc, t\u1eeb c\u00e1c t\u1ea5m m\u00e0i ch\u00ednh x\u00e1c \u0111\u1ebfn c\u00e1c b\u1ed9 ph\u1eadn r\u00e8n t\u00f9y ch\u1ec9nh, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. C\u00e1c s\u1ea3n ph\u1ea9m th\u00e9p D7 c\u1ee7a ch\u00fang t\u00f4i tr\u1ea3i qua c\u00e1c quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t nghi\u00eam ng\u1eb7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ed1i \u01b0u trong m\u00f4i tr\u01b0\u1eddng \u1ee9ng su\u1ea5t cao, khi\u1ebfn ch\u00fang tr\u1edf n\u00ean ho\u00e0n h\u1ea3o cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p m\u00e0 tu\u1ed5i th\u1ecd c\u00f4ng c\u1ee5 d\u00e0i v\u00e0 hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n l\u00e0 r\u1ea5t quan tr\u1ecdng.&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>D7 cold work tool steel stands out in applications where high wear resistance and toughness are a must. Known for [&hellip;]<\/p>","protected":false},"author":12,"featured_media":19864,"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-19876","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\/19876","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=19876"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/19876\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/19864"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=19876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=19876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=19876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}