{"id":20626,"date":"2025-02-14T03:10:00","date_gmt":"2025-02-13T19:10:00","guid":{"rendered":"https:\/\/steelprogroup.com\/?p=20626"},"modified":"2025-02-18T11:17:58","modified_gmt":"2025-02-18T03:17:58","slug":"dual-phase","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/automotive-steel\/dual-phase\/","title":{"rendered":"Th\u00e9p hai pha | H\u01b0\u1edbng d\u1eabn c\u1ee7a DP AHSS"},"content":{"rendered":"<p>Th\u00e9p hai pha (DP) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a thi\u1ebft k\u1ebf \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i. N\u00f3 cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p t\u1ed1i \u01b0u gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a xe. SteelPro Group cung c\u1ea5p v\u1eadt li\u1ec7u ti\u00ean ti\u1ebfn n\u00e0y \u1edf tr\u1ea1ng th\u00e1i c\u00e1n n\u00f3ng v\u00e0 c\u00e1n ngu\u1ed9i, b\u1ed5 sung b\u1eb1ng m\u1ed9t lo\u1ea1t c\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd b\u1ec1 m\u1eb7t, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1 k\u1ebdm.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p hai pha l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p Dual Phase (DP) l\u00e0 lo\u1ea1i th\u00e9p c\u00f3 \u0111\u1ed9 b\u1ec1n cao, \u0111\u1eb7c tr\u01b0ng b\u1edfi ma tr\u1eadn ferritic m\u1ec1m xen k\u1ebd v\u1edbi c\u00e1c \u0111\u1ea3o martensite c\u1ee9ng. Lo\u1ea1i th\u00e9p n\u00e0y c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o cao, \u0111\u1ed9 d\u1ebbo \u0111\u1eb7c bi\u1ec7t v\u00e0 kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng va \u0111\u1eadp \u0111\u00e1ng k\u1ec3. Nh\u1edd th\u00e0nh ph\u1ea7n h\u1ee3p kim c\u00e2n b\u1eb1ng, th\u00e9p n\u00e0y k\u1ebft h\u1ee3p kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t v\u1edbi c\u00e1c ho\u1ea1t \u0111\u1ed9ng t\u1ea1o h\u00ecnh c\u00f3 \u0111\u1ed9 gi\u00e3n d\u00e0i cao. Th\u00e9p DP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4 nh\u01b0 c\u1eeda, mui xe v\u00e0 c\u1ea3n xe.<\/p><p>Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t th\u00e9p DP \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u1ea9n th\u1eadn \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a n\u00f3. Th\u00e9p DP c\u00e1n n\u00f3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u1edf nhi\u1ec7t \u0111\u1ed9 c\u00e1n v\u00e0 t\u1ed1c \u0111\u1ed9 l\u00e0m ngu\u1ed9i \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t tr\u00ean m\u00e1y c\u00e1n d\u1ea3i n\u00f3ng \u0111\u1ec3 t\u1ea1o ra c\u1ea5u tr\u00fac ferritic-martensitic t\u1eeb austenite. C\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a th\u00e9p DP c\u00e1n ngu\u1ed9i \u0111\u01b0\u1ee3c tinh ch\u1ec9nh trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t tr\u00ean d\u00e2y chuy\u1ec1n \u1ee7 li\u00ean t\u1ee5c, cho ph\u00e9p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i austenite \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo mong mu\u1ed1n.&nbsp;<\/p><h2 class=\"wp-block-heading\">\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a th\u00e9p hai pha<\/h2><h3 class=\"wp-block-heading\">T\u1ef7 l\u1ec7 l\u00e0m vi\u1ec7c ban \u0111\u1ea7u cao<\/h3><p>Th\u00e9p DP tr\u1edf n\u00ean c\u1ee9ng h\u01a1n v\u00e0 b\u1ec1n h\u01a1n khi bi\u1ebfn d\u1ea1ng, duy tr\u00ec h\u00ecnh d\u1ea1ng v\u00e0 \u0111\u1ed9 b\u1ec1n sau khi t\u1ea1o h\u00ecnh. T\u00ednh ch\u1ea5t n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n tr\u1ea3i qua qu\u00e1 tr\u00ecnh \u0111\u1ecbnh h\u00ecnh nghi\u00eam ng\u1eb7t, \u0111\u1ea3m b\u1ea3o ch\u00fang v\u1eabn b\u1ec1n \u1edf d\u1ea1ng cu\u1ed1i c\u00f9ng.<\/p><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng k\u00e9o s\u00e2u v\u00e0 t\u1ea1o h\u00ecnh co gi\u00e3n tuy\u1ec7t v\u1eddi<\/h3><p>Th\u00e9p DP c\u00f3 \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c t\u1ea1o h\u00ecnh d\u1ea1ng s\u00e2u ho\u1eb7c ph\u1ee9c t\u1ea1p, r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ea1o ra c\u00e1c b\u1ed9 ph\u1eadn v\u00e0 t\u1ea5m th\u00e2n xe \u00f4 t\u00f4 ph\u1ee9c t\u1ea1p. Kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh n\u00e0y ng\u0103n ng\u1eeba n\u1ee9t v\u00e0 duy tr\u00ec \u0111\u1ed9 b\u1ec1n ngay c\u1ea3 khi \u0111\u01b0\u1ee3c t\u1ea1o h\u00ecnh th\u00e0nh c\u00e1c thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p.<\/p><h3 class=\"wp-block-heading\">S\u1ee9c ch\u1ecbu l\u1ef1c cao<\/h3><p>\u0110\u1ed9 b\u1ec1n k\u00e9o cao c\u1ee7a th\u00e9p DP cho ph\u00e9p n\u00f3 ch\u1ecbu \u0111\u01b0\u1ee3c \u1ee9ng su\u1ea5t \u0111\u00e1ng k\u1ec3 m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng l\u00e2u d\u00e0i. \u0110\u1eb7c t\u00ednh n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn k\u1ebft c\u1ea5u trong \u00f4 t\u00f4 v\u00e0 thi\u1ebft b\u1ecb.<\/p><h3 class=\"wp-block-heading\">S\u1ee9c b\u1ec1n k\u00e9o \u1ea5n t\u01b0\u1ee3ng<\/h3><p>\u0110\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a th\u00e9p DP cho ph\u00e9p n\u00f3 ch\u1ecbu \u0111\u01b0\u1ee3c \u1ee9ng su\u1ea5t c\u1ef1c \u0111\u1ea1i tr\u01b0\u1edbc khi b\u1ecb g\u00e3y. \u0110\u1ed9 b\u1ec1n n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1ed9 tin c\u1eady c\u1ee7a khung v\u00e0 t\u1ea5m th\u00e2n xe \u00f4 t\u00f4 quan tr\u1ecdng v\u1ec1 an to\u00e0n.<\/p><h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi v\u00e0 \u0111\u1ed9 nh\u1ea1y t\u1ed1c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng v\u01b0\u1ee3t tr\u1ed9i<\/h3><p>Th\u00e9p DP c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng l\u1eb7p l\u1ea1i ho\u1eb7c dao \u0111\u1ed9ng, l\u00fd t\u01b0\u1edfng cho c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4 ph\u1ea3i ch\u1ecbu rung \u0111\u1ed9ng v\u00e0 \u1ee9ng su\u1ea5t li\u00ean t\u1ee5c. \u0110\u1ed9 nh\u1ea1y c\u1ee7a n\u00f3 v\u1edbi nh\u1eefng thay \u0111\u1ed5i v\u1ec1 t\u1ed1c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai trong \u0111i\u1ec1u ki\u1ec7n \u0111\u1ed9ng.<\/p><h3 class=\"wp-block-heading\">\u0110\u1ed9 c\u1ee9ng n\u01b0\u1edbng hi\u1ec7u qu\u1ea3<\/h3><p>Kh\u1ea3 n\u0103ng t\u00f4i luy\u1ec7n c\u1ee7a th\u00e9p DP cho ph\u00e9p t\u0103ng \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n sau khi s\u01a1n v\u00e0 nung trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u00f4 t\u00f4. T\u00ednh n\u0103ng n\u00e0y l\u00e0m t\u0103ng \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu va ch\u1ea1m, n\u00e2ng cao t\u00ednh an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a xe.<\/p><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng th\u00e9p hai pha<\/h2><p>Th\u00e9p hai pha (DP) \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn cho c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00ec kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh tuy\u1ec7t v\u1eddi, cho ph\u00e9p \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac xe ph\u1ee9c t\u1ea1p. Ngo\u00e0i ra, th\u00e9p DP c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp v\u01b0\u1ee3t tr\u1ed9i. C\u00f9ng v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh nh\u1eb9, th\u00e9p DP g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n c\u1ea3 t\u00ednh an to\u00e0n c\u1ee7a xe v\u00e0 kh\u1ea3 n\u0103ng ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u.&nbsp;<\/p><ul class=\"wp-block-list\"><li>T\u1ea5m th\u00e2n xe nh\u01b0 c\u1eeda, mui xe v\u00e0 n\u1eafp c\u1ed1p.<\/li>\n\n<li>C\u1ea3n xe<\/li>\n\n<li>C\u00e1c th\u00e0nh ph\u1ea7n c\u1ea5u tr\u00fac nh\u01b0 khung g\u1ea7m v\u00e0 khung xe.<\/li>\n\n<li>C\u00e1c chi ti\u1ebft gia c\u1ed1 nh\u01b0 d\u1ea7m c\u1eeda v\u00e0 ph\u1ea7n gia c\u1ed1 gh\u1ebf ng\u1ed3i.<\/li>\n\n<li>Gi\u1ebfng b\u00e1nh xe.<\/li>\n\n<li>C\u00e1c thanh ngang nh\u01b0 gi\u00e1 \u0111\u1ee1 \u0111\u1ed9ng c\u01a1 v\u00e0 h\u1ed9p s\u1ed1.<\/li><\/ul><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p hai pha<\/h2><p>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p hai pha \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u1ea9n th\u1eadn \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft cho c\u00e1c th\u00e0nh ph\u1ea7n xe kh\u00e1c nhau. Th\u00e9p hai pha c\u00e1n n\u00f3ng th\u01b0\u1eddng c\u00f3 h\u00e0m l\u01b0\u1ee3ng h\u1ee3p kim cao h\u01a1n th\u00e9p hai pha c\u00e1n ngu\u1ed9i \u0111\u1ec3 h\u1ed7 tr\u1ee3 l\u00e0m m\u00e1t c\u00f3 ki\u1ec3m so\u00e1t v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac vi m\u00f4 mong mu\u1ed1n.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Y\u1ebfu t\u1ed1<\/strong><\/td><td><strong>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh (%)<\/strong><\/td><td><strong>Vai tr\u00f2<\/strong><\/td><\/tr><tr><td>Cacbon (C)<\/td><td>0.06% &#8211; 0.15%<\/td><td>T\u0103ng c\u01b0\u1eddng s\u1ef1 h\u00ecnh th\u00e0nh martensit, t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n.<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>1.5% &#8211; 3%<\/td><td>Dung d\u1ecbch r\u1eafn t\u0103ng c\u01b0\u1eddng trong ferit, \u1ed5n \u0111\u1ecbnh austenit.<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>&lt; 1,0%<\/td><td>Ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a perlit ho\u1eb7c bainit, c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng.<\/td><\/tr><tr><td>Molip\u0111en (Mo)<\/td><td>&lt; 0,5%<\/td><td>Ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh perlit ho\u1eb7c bainit, c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng.<\/td><\/tr><tr><td>Silic (Si)<\/td><td>0.2% &#8211; 0.5%<\/td><td>Th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i ferit, t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n.<\/td><\/tr><tr><td>Vanadi (V)<\/td><td>L\u01b0\u1ee3ng v\u1ebft (th\u01b0\u1eddng &lt; 0,1%)<\/td><td rowspan=\"2\">T\u0103ng c\u01b0\u1eddng k\u1ebft t\u1ee7a, tinh ch\u1ec9nh c\u1ea5u tr\u00fac vi m\u00f4.<\/td><\/tr><tr><td>Niobi (Nb)<\/td><td>L\u01b0\u1ee3ng v\u1ebft (th\u01b0\u1eddng &lt; 0,1%)<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p hai pha<\/h2><p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i th\u00e9p pha k\u00e9p do SteelPro Group s\u1ea3n xu\u1ea5t c\u00f9ng v\u1edbi c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a ch\u00fang.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td rowspan=\"2\"><strong>C\u1ea5p th\u00e9p<\/strong><\/td><td colspan=\"4\"><strong>Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n k\u00e9o<\/strong><\/td><\/tr><tr><td><strong>S\u1ee9c ch\u1ecbu l\u1ef1c&nbsp;<\/strong><strong>(Li\u00ean quan, MPa)<\/strong><\/td><td><strong>\u0110\u1ed9 b\u1ec1n k\u00e9o&nbsp;<\/strong><strong>(Rm, MPa)<\/strong><\/td><td><strong>\u0110\u1ed9 gi\u00e3n d\u00e0i&nbsp;<\/strong><strong>(A50, %)<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb N<\/strong><\/td><\/tr><tr><td>260\/450DP<\/td><td>260-340<\/td><td>\u2265450<\/td><td>29<\/td><td>&gt;0,16<\/td><\/tr><tr><td>340\/590DP<\/td><td>340-460<\/td><td>\u2265590<\/td><td>23<\/td><td>&gt;0,14<\/td><\/tr><tr><td>410\/590DP<\/td><td>410-580<\/td><td>\u2265590<\/td><td>18<\/td><td>&#8211;<\/td><\/tr><tr><td>420\/780DP<\/td><td>420-550<\/td><td>\u2265780<\/td><td>15<\/td><td>&#8211;<\/td><\/tr><tr><td>500\/780DP<\/td><td>500-650<\/td><td>\u2265780<\/td><td>12<\/td><td>&#8211;<\/td><\/tr><tr><td>550\/980DP<\/td><td>550-760<\/td><td>\u2265980<\/td><td>11<\/td><td>&#8211;<\/td><\/tr><tr><td>550\/980DP-LSi<\/td><td>550-700<\/td><td>\u2265980<\/td><td>10<\/td><td>&#8211;<\/td><\/tr><tr><td>600\/980DP-LC<\/td><td>600-750<\/td><td>\u2265980<\/td><td>10<\/td><td>&#8211;<\/td><\/tr><tr><td>700\/980DP<\/td><td>700-920<\/td><td>\u2265980<\/td><td>10<\/td><td>&#8211;<\/td><\/tr><tr><td>820\/1180DP<\/td><td>820-1150<\/td><td>\u22651180<\/td><td>7<\/td><td>&#8211;<\/td><\/tr><tr><td colspan=\"5\">a. RP0.2 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi kh\u00f4ng c\u00f3 gi\u1edbi h\u1ea1n ch\u1ea3y r\u00f5 r\u00e0ng, n\u1ebfu kh\u00f4ng, ReL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. b. M\u1eabu k\u00e9o \u0111\u01b0\u1ee3c l\u1ea5y l\u00e0m m\u1eabu ngang. c. Khi \u0111\u1ed9 d\u00e0y danh ngh\u0129a c\u1ee7a s\u1ea3n ph\u1ea9m l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 0,70mm nh\u01b0ng nh\u1ecf h\u01a1n 1,00mm, \u0111\u1ed9 gi\u00e3n d\u00e0i sau khi g\u00e3y \u0111\u01b0\u1ee3c ph\u00e9p gi\u1ea3m 1%.<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u1ea1o h\u00ecnh v\u00e0 h\u00e0n th\u00e9p hai pha<\/h2><p>C\u1ea5u tr\u00fac vi m\u00f4 ferit v\u00e0 martensite c\u1ee7a th\u00e9p DP cung c\u1ea5p \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh tuy\u1ec7t v\u1eddi. T\u1ed1c \u0111\u1ed9 l\u00e0m c\u1ee9ng cao c\u1ee7a n\u00f3 cho ph\u00e9p bi\u1ebfn d\u1ea1ng \u0111\u00e1ng k\u1ec3. \u0110\u1ed9 b\u1ec1n k\u00e9o trong th\u00e9p hai pha (DP) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng th\u00f4ng qua qu\u00e1 tr\u00ecnh l\u00e0m c\u1ee9ng bi\u1ebfn d\u1ea1ng v\u00e0 l\u00e0m c\u1ee9ng nung.<\/p><p>H\u00e0n th\u00e9p DP li\u00ean quan \u0111\u1ebfn vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ea7u v\u00e0o \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh martensite gi\u00f2n trong V\u00f9ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t (HAZ). Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 gi\u1eefa c\u00e1c l\u1edbp v\u00e0 s\u1eed d\u1ee5ng x\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n (PWHT) c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng gi\u00f2n. C\u00e1c lo\u1ea1i c\u00f3 \u0111\u1ed9 b\u1ec1n cao h\u01a1n \u0111\u00f2i h\u1ecfi ph\u1ea3i ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn h\u01a1n \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 b\u1ec1n m\u1ed1i h\u00e0n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi.<\/p><h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Th\u00e9p Duplex Phase<\/h2><h3 class=\"wp-block-heading\">TRIP Steel so v\u1edbi Dual Phase<\/h3><p>Th\u00e9p TRIP cung c\u1ea5p \u0111\u1ed9 gi\u00e3n d\u00e0i v\u00e0 h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng t\u1ed1t h\u01a1n do pha austenite gi\u1eef l\u1ea1i, chuy\u1ec3n th\u00e0nh martensite trong qu\u00e1 tr\u00ecnh bi\u1ebfn d\u1ea1ng. M\u1eb7t kh\u00e1c, th\u00e9p DP, bao g\u1ed3m ferrite v\u00e0 martensite, cung c\u1ea5p \u0111\u1ed9 b\u1ec1n k\u00e9o cao h\u01a1n v\u00e0 ph\u00f9 h\u1ee3p h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p hai pha bao g\u1ed3m nh\u1eefng pha n\u00e0o?<\/h3><p>Th\u00e9p hai pha bao g\u1ed3m s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a ferit v\u00e0 martensite. Pha ferit m\u1ec1m v\u00e0 d\u1ec5 u\u1ed1n, trong khi pha martensite c\u1ee9ng h\u01a1n v\u00e0 b\u1ec1n h\u01a1n. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y cung c\u1ea5p cho th\u00e9p DP s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1i \u01b0u gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 v\u00e0 k\u1ebft c\u1ea5u.<\/p><h3 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p hai pha l\u00e0 g\u00ec?<\/h3><p>Nh\u01b0\u1ee3c \u0111i\u1ec3m ch\u00ednh c\u1ee7a th\u00e9p Dual Phase bao g\u1ed3m kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh gi\u1ea3m \u1edf c\u00e1c c\u1ea5p \u0111\u1ed9 b\u1ec1n cao h\u01a1n, v\u00ec h\u00e0m l\u01b0\u1ee3ng martensite t\u0103ng khi\u1ebfn th\u00e9p gi\u00f2n h\u01a1n v\u00e0 k\u00e9m d\u1ebbo h\u01a1n. Ngo\u00e0i ra, th\u00e9p DP c\u00f3 th\u1ec3 d\u1ec5 b\u1ecb th\u1eaft n\u00fat c\u1ee5c b\u1ed9 trong qu\u00e1 tr\u00ecnh \u0111\u1ecbnh h\u00ecnh n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn. Th\u00e9p n\u00e0y c\u0169ng \u0111\u00f2i h\u1ecfi c\u00e1c \u0111i\u1ec1u ki\u1ec7n h\u00e0n ch\u00ednh x\u00e1c \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c pha gi\u00f2n trong V\u00f9ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t (HAZ). Cu\u1ed1i c\u00f9ng, h\u00e0m l\u01b0\u1ee3ng h\u1ee3p kim cao h\u01a1n \u1edf m\u1ed9t s\u1ed1 c\u1ea5p \u0111\u1ed9 c\u00f3 th\u1ec3 l\u00e0m t\u0103ng chi ph\u00ed v\u1eadt li\u1ec7u.<\/p><h3 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p hai pha v\u00e0 th\u00e9p pha ph\u1ee9c h\u1ee3p l\u00e0 g\u00ec?<\/h3><p><a href=\"https:\/\/steelprogroup.com\/vi\/automotive-steel\/complex-phase\/\">th\u00e9p CP<\/a>, ngo\u00e0i ferrite v\u00e0 martensite, c\u00f2n ch\u1ee9a c\u00e1c pha nh\u01b0 bainite ho\u1eb7c austenite gi\u1eef l\u1ea1i, mang l\u1ea1i \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi v\u01b0\u1ee3t tr\u1ed9i. Ng\u01b0\u1ee3c l\u1ea1i, th\u00e9p DP ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb ferrite v\u00e0 martensite, mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1t h\u01a1n gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo, v\u00e0 d\u1ec5 h\u00e0n h\u01a1n so v\u1edbi th\u00e9p CP.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p pha k\u00e9p ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 c\u1ee7a b\u1ea1n<\/h2><p>SteelPro Group l\u00e0 nh\u00e0 cung c\u1ea5p chuy\u00ean nghi\u1ec7p th\u00e9p c\u1ea5p \u00f4 t\u00f4, cung c\u1ea5p <a href=\"https:\/\/steelprogroup.com\/vi\/automotive-steel\/dp590-coils\/\">DP590<\/a>, <a href=\"https:\/\/steelprogroup.com\/vi\/automotive-steel\/780dp-coils\/\">DP780<\/a>, <a href=\"https:\/\/steelprogroup.com\/vi\/automotive-steel\/980dp-coils\/\">DP980<\/a>v\u00e0 th\u1eadm ch\u00ed <a href=\"https:\/\/steelprogroup.com\/vi\/automotive-steel\/1180dp-coils\/\">Th\u00e9p DP1180<\/a>. Ch\u00fang t\u00f4i cung c\u1ea5p h\u1ed7 tr\u1ee3 d\u1eef li\u1ec7u \u1ee9ng d\u1ee5ng to\u00e0n di\u1ec7n cho th\u00e9p \u00f4 t\u00f4, gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p cho t\u1eebng b\u1ed9 ph\u1eadn \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u.&nbsp;<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Th\u00e9p hai pha (DP) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a thi\u1ebft k\u1ebf \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i. N\u00f3 cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p t\u1ed1i \u01b0u gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai [\u2026]<\/p>","protected":false},"author":12,"featured_media":20566,"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":[4306],"tags":[],"class_list":["post-20626","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-automotive-steel"],"acf":[],"_links":{"self":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20626","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=20626"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/20626\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/20566"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=20626"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=20626"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=20626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}