{"id":8612,"date":"2024-08-22T06:18:00","date_gmt":"2024-08-21T22:18:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=8612"},"modified":"2025-02-18T10:17:43","modified_gmt":"2025-02-18T02:17:43","slug":"grade-420","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-420\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 420: \u0110\u1ecbnh ngh\u0129a, Th\u00e0nh ph\u1ea7n, T\u00ednh ch\u1ea5t, \u1ee8ng d\u1ee5ng v\u00e0 Th\u00eam n\u1eefa"},"content":{"rendered":"<p>Th\u00e9p kh\u00f4ng g\u1ec9 420 n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 s\u1eafc b\u00e9n trong khi v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng \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 xem x\u00e9t c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420 v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh c\u1ee7a n\u00f3, \u0111\u1ed3ng th\u1eddi hi\u1ec3u m\u1ecdi th\u1ee9 v\u1ec1 n\u00f3.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 UNS S42000. \u0110\u00e2y l\u00e0 m\u1ed9t h\u1ecd <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/types\/martensite\/\">th\u00e9p kh\u00f4ng g\u1ec9 martensitic<\/a>. N\u00f3 bao g\u1ed3m kho\u1ea3ng 85-88% s\u1eaft, 12-14% crom v\u00e0 0,15-0,45% cacbon. N\u00f3 c\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n cao. N\u00f3 l\u00fd t\u01b0\u1edfng cho c\u00e1c c\u00f4ng c\u1ee5 c\u1eaft, d\u1ee5ng c\u1ee5 y t\u1ebf, b\u00e1nh r\u0103ng c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u00f4 t\u00f4. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh c\u00e1c lo\u1ea1i kh\u00e1c nhau nh\u01b0 420J1 v\u00e0 420J2.<\/p><h3 class=\"wp-block-heading\">T\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 420<\/h3><p>C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 420 t\u00f9y thu\u1ed9c v\u00e0o ti\u00eau chu\u1ea9n v\u00e0 qu\u1ed1c gia.<\/p><ul class=\"wp-block-list\"><li>S42000 (H\u1ec7 th\u1ed1ng \u0111\u00e1nh s\u1ed1 th\u1ed1ng nh\u1ea5t)<\/li>\n\n<li>1.4021 (Ti\u00eau chu\u1ea9n Ch\u00e2u \u00c2u)<\/li>\n\n<li>AISI 420 (Vi\u1ec7n S\u1eaft v\u00e0 Th\u00e9p Hoa K\u1ef3)<\/li>\n\n<li>1.4021 (Ti\u00eau chu\u1ea9n \u0110\u1ee9c)<\/li>\n\n<li>SUS420J1 v\u00e0 SUS420J2 (Ti\u00eau chu\u1ea9n Nh\u1eadt B\u1ea3n)<\/li><\/ul><h3 class=\"wp-block-heading\">Ti\u00eau chu\u1ea9n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h3><ul class=\"wp-block-list\"><li>Ti\u00eau chu\u1ea9n ASTMA276<\/li>\n\n<li>Ti\u00eau chu\u1ea9n ASTM A240\/A240M<\/li>\n\n<li>Ti\u00eau chu\u1ea9n ASTM A580\/A580M<\/li><\/ul><h2 class=\"wp-block-heading\">C\u00e1c nh\u00f3m con c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><p><strong>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh nhi\u1ec1u nh\u00f3m kh\u00e1c nhau d\u1ef1a tr\u00ean h\u00e0m l\u01b0\u1ee3ng carbon v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u1ee5 th\u1ec3 c\u1ee7a n\u00f3.&nbsp;<\/strong><\/p><h4 class=\"wp-block-heading\">420J1<\/h4><p>H\u00e0m l\u01b0\u1ee3ng Carbon: Th\u1ea5p h\u01a1n (kho\u1ea3ng 0,15-0,25%)<\/p><p>T\u00ednh ch\u1ea5t: C\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t v\u1edbi \u0111\u1ed9 c\u1ee9ng v\u1eeba ph\u1ea3i.<\/p><p>\u1ee8ng d\u1ee5ng: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u1eefng t\u00ecnh hu\u1ed1ng m\u00e0 \u0111\u1ed9 b\u1ec1n \u0111\u01b0\u1ee3c \u01b0u ti\u00ean h\u01a1n \u0111\u1ed9 c\u1ee9ng. Bao g\u1ed3m dao k\u00e9o v\u00e0 d\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt.<\/p><h4 class=\"wp-block-heading\">420J2<\/h4><p>H\u00e0m l\u01b0\u1ee3ng Carbon: Cao h\u01a1n (kho\u1ea3ng 0,26-0,40%)<\/p><p>T\u00ednh ch\u1ea5t: C\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n cao h\u01a1n. Nh\u01b0ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n k\u00e9m h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi 420J1.<\/p><p>\u1ee8ng d\u1ee5ng: Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t h\u01a1n. Bao g\u1ed3m l\u01b0\u1ee1i dao, k\u00e9o v\u00e0 l\u01b0\u1ee1i dao c\u00f4ng nghi\u1ec7p.<\/p><h2 class=\"wp-block-heading\">Nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0o t\u1ea1o n\u00ean th\u00e9p kh\u00f4ng g\u1ec9 420?<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td>Y\u1ebfu t\u1ed1<\/td><td>Ph\u1ea7n tr\u0103m (%)<\/td><\/tr><tr><td>S\u1eaft (Fe)<\/td><td>C\u00e2n b\u1eb1ng (kho\u1ea3ng 85-88)<\/td><\/tr><tr><td>Cacbon (C)<\/td><td>0.15-0.45<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>12-14<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>L\u00ean \u0111\u1ebfn 1<\/td><\/tr><tr><td>Silic (Si)<\/td><td>L\u00ean \u0111\u1ebfn 1<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>L\u00ean \u0111\u1ebfn 0,04<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>L\u00ean \u0111\u1ebfn 0,03<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh (Metric)<\/strong><\/td><\/tr><tr><td>T\u1ec9 tr\u1ecdng<\/td><td>7,75 g\/cm\u00b3 (0,28 lb\/in\u00b3)<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn \u0111i\u1ec7n<\/td><td>1,4 x 10\u2076 \u0110\u1ed9 d\u00e0i\/m<\/td><\/tr><tr><td>T\u00ednh ch\u1ea5t t\u1eeb t\u00ednh<\/td><td>T\u1eeb t\u00ednh<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u1eeb t\u00ednh. N\u00f3 thu\u1ed9c v\u1ec1 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 martensitic, c\u00f3 t\u1eeb t\u00ednh. S\u1eaft trong th\u00e9p kh\u00f4ng g\u1ec9 420 l\u00e0m cho n\u00f3 c\u00f3 t\u1eeb t\u00ednh, v\u00e0 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m c\u1ee9ng th\u00f4ng qua x\u1eed l\u00fd nhi\u1ec7t. N\u1ebfu b\u1ea1n c\u1ea7n th\u00e9p kh\u00f4ng g\u1ec9 c\u1ee9ng v\u00e0 t\u1eeb t\u00ednh, 420 l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1t.<\/p><p><strong>\u0110\u1ecdc li\u00ean quan<\/strong><br><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/magnetic\/\">Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/a><\/p><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh<\/strong><\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td><td>1450\u00b0C (2642\u00b0F)<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>24,9 W\/m\u00b7K (14,4 BTU\/ft\u00b7h\u00b7\u00b0F)<\/td><\/tr><tr><td>S\u1ef1 gi\u00e3n n\u1edf v\u00ec nhi\u1ec7t<\/td><td>10,3 \u00b5m\/m\u00b7\u00b0C (5,7 \u00b5in\/in\u00b7\u00b0F)<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang<\/td><td>460 J\/kg\u00b7K (0,11 BTU\/lb\u00b7\u00b0F)<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><p>Ki\u1ec3m tra b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420:<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>T\u00e0i s\u1ea3n<\/strong><\/td><td><strong>Gi\u00e1 tr\u1ecb<\/strong><\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td><td>620-750MPa<\/td><\/tr><tr><td>S\u1ee9c ch\u1ecbu l\u1ef1c<\/td><td>345-415MPa<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Brinell (HB)<\/td><td>207-235<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Rockwell (HRC)<\/td><td>50<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng Vickers (HV)<\/td><td>540<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i<\/td><td>20%<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>200 GPa<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">\u0110\u1ed9 c\u1ee9ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h3><p>\u0110\u1ed9 c\u1ee9ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t, nh\u01b0ng th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng 48-56 HRC (\u0110\u1ed9 c\u1ee9ng Rockwell).&nbsp;<\/p><p>Khi \u1edf tr\u1ea1ng th\u00e1i \u1ee7, n\u00f3 c\u00f3 \u0111\u1ed9 c\u1ee9ng th\u1ea5p h\u01a1n, nh\u01b0ng sau khi t\u00f4i v\u00e0 ram \u0111\u00fang c\u00e1ch, n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi m\u1ee9c cao nh\u1ea5t trong kho\u1ea3ng n\u00e0y.<\/p><h2 class=\"wp-block-heading\">Ch\u1ed1ng \u0103n m\u00f2n<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 h\u00e0m l\u01b0\u1ee3ng crom 12-14%. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t. Nh\u01b0ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a n\u00f3 th\u1ea5p h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 304 ho\u1eb7c 316. N\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong n\u01b0\u1edbc ng\u1ecdt, h\u00f3a ch\u1ea5t nh\u1eb9 v\u00e0 \u0111i\u1ec1u ki\u1ec7n kh\u00ed quy\u1ec3n b\u00ecnh th\u01b0\u1eddng. Tuy nhi\u00ean, n\u00f3 k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n trong m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00ednh axit ho\u1eb7c m\u1eb7n cao.<\/p><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 l\u00fd t\u01b0\u1edfng cho dao k\u00e9o, d\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp v\u00e0 d\u1ee5ng c\u1ee5 y t\u1ebf do <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/properties\/corrosion-resistant\/\">kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n<\/a>N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p v\u00e0 ph\u1ee5 t\u00f9ng \u00f4 t\u00f4, n\u01a1i \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n r\u1ea5t quan tr\u1ecdng.<\/p><h2 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t. Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 v\u1eeba ph\u1ea3i l\u00ean \u0111\u1ebfn kho\u1ea3ng 700\u00b0C (1292\u00b0F). \u1ede nhi\u1ec7t \u0111\u1ed9 n\u00e0y, th\u00e9p kh\u00f4ng g\u1ec9 420 ch\u1ed1ng l\u1ea1i s\u1ef1 \u0111\u00f3ng c\u1eb7n v\u00e0 oxy h\u00f3a. Th\u00edch h\u1ee3p cho h\u1ec7 th\u1ed1ng \u1ed1ng x\u1ea3 \u00f4 t\u00f4 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c th\u01b0\u1eddng xuy\u00ean ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t.&nbsp;<\/p><p>Nh\u01b0ng trong m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t, c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c nh\u01b0 310 ho\u1eb7c 316 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n.<\/p><p>X\u1eed l\u00fd nhi\u1ec7t \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd n\u00e0y gi\u00fap th\u00e9p gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n sau nhi\u1ec1u chu k\u1ef3 gia nhi\u1ec7t v\u00e0 l\u00e0m ngu\u1ed9i.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/h2><p>Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn:<\/p><ul class=\"wp-block-list\"><li>Dao k\u00e9o v\u00e0 d\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp<\/li><\/ul><p>Th\u00edch h\u1ee3p cho dao v\u00e0 d\u1ee5ng c\u1ee5 c\u1eaft v\u00ec c\u00f3 \u0111\u1ed9 c\u1ee9ng cao v\u00e0 kh\u1ea3 n\u0103ng gi\u1eef c\u1ea1nh s\u1eafc.<\/p><ul class=\"wp-block-list\"><li>D\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt<\/li><\/ul><p>Ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c d\u1ee5ng c\u1ee5 y t\u1ebf c\u1ea7n \u0111\u1ed9 s\u1eafc b\u00e9n v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c kh\u1eed tr\u00f9ng.<\/p><ul class=\"wp-block-list\"><li>Linh ki\u1ec7n c\u00f4ng nghi\u1ec7p<\/li><\/ul><p>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 ph\u1eadn m\u00e1y m\u00f3c nh\u01b0 van, tr\u1ee5c b\u01a1m v\u00e0 b\u00e1nh r\u0103ng \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n cao.<\/p><ul class=\"wp-block-list\"><li>Ph\u1ee5 t\u00f9ng \u00f4 t\u00f4<\/li><\/ul><p>C\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 l\u00f2 xo v\u00e0 van \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb \u0111\u1ed9 b\u1ec1n v\u00e0 s\u1ee9c m\u1ea1nh c\u1ee7a n\u00f3.<\/p><ul class=\"wp-block-list\"><li>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/li><\/ul><p>Ch\u1ed1ng axit trong th\u1ef1c ph\u1ea9m v\u00e0 d\u1ec5 v\u1ec7 sinh, l\u00fd t\u01b0\u1edfng cho l\u01b0\u1ee1i dao v\u00e0 m\u00e1y th\u00e1i l\u00e1t.<\/p><h2 class=\"wp-block-heading\">\u01afu \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><ul class=\"wp-block-list\"><li>\u0110\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n cao<\/li><\/ul><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c t\u00f4i luy\u1ec7n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n cao. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 c\u1eaft thi\u1ebft b\u1ecb, m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p v\u00e0 dao m\u1ed5.<\/p><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t<\/li><\/ul><p>N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n tuy\u1ec7t v\u1eddi. \u0110i\u1ec1u n\u00e0y c\u00f3 l\u1ee3i cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi s\u1eed d\u1ee5ng l\u00e2u d\u00e0i v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p><ul class=\"wp-block-list\"><li>Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/li><\/ul><p>Th\u00e9p 420 c\u00f3 th\u1ec3 mang l\u1ea1i hi\u1ec7u su\u1ea5t t\u1ed1t v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c nh\u01b0 316.<\/p><h2 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i<\/li><\/ul><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n th\u1ea5p h\u01a1n th\u00e9p 304 ho\u1eb7c 316. N\u00f3 c\u00f3 th\u1ec3 d\u1ec5 b\u1ecb \u0103n m\u00f2n h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng c\u00f3 t\u00ednh \u0103n m\u00f2n cao.&nbsp;<\/p><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng h\u00e0n k\u00e9m<\/li><\/ul><p>Do c\u1ea7n ph\u1ea3i ng\u0103n ng\u1eeba n\u1ee9t, h\u00e0n th\u00e9p kh\u00f4ng g\u1ec9 420 c\u1ea7n ph\u1ea3i gia nhi\u1ec7t tr\u01b0\u1edbc v\u00e0 x\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n c\u1ea9n th\u1eadn. V\u00ec v\u1eady, qu\u00e1 tr\u00ecnh c\u00f3 th\u1ec3 ph\u1ee9c t\u1ea1p h\u01a1n<\/p><ul class=\"wp-block-list\"><li>Kh\u1ea3 n\u0103ng l\u00e0m vi\u1ec7c l\u1ea1nh h\u1ea1n ch\u1ebf<\/li><\/ul><p>\u0110\u1ed9 c\u1ee9ng cao c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420 l\u00e0m cho n\u00f3 \u00edt ph\u00f9 h\u1ee3p cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng t\u1ea1o h\u00ecnh ngu\u1ed9i quy m\u00f4 l\u1edbn v\u00ec n\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn n\u1ee9t.<\/p><ul class=\"wp-block-list\"><li>\u0110\u1ed9 nh\u1ea1y nhi\u1ec7t<\/li><\/ul><p>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao h\u1ea1n ch\u1ebf so v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c. N\u00f3 c\u00f3 th\u1ec3 m\u1ea5t \u0111\u1ed9 b\u1ec1n ho\u1eb7c bi\u1ebfn d\u1ea1ng n\u1ebfu ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao.<\/p><h2 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><h3 class=\"wp-block-heading\">\u1ee6<\/h3><p>Nung n\u00f3ng th\u00e9p \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 cao. Sau \u0111\u00f3 l\u00e0m ngu\u1ed9i t\u1eeb t\u1eeb. N\u00f3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u1ee9ng su\u1ea5t b\u00ean trong v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ebbo.<\/p><h3 class=\"wp-block-heading\">L\u00e0m c\u1ee9ng<\/h3><p>Th\u00e9p \u0111\u01b0\u1ee3c nung n\u00f3ng \u0111\u1ebfn 980-1065\u00b0C (1796-1949\u00b0F) v\u00e0 sau \u0111\u00f3 l\u00e0m ngu\u1ed9i nhanh (l\u00e0m ngu\u1ed9i) trong d\u1ea7u ho\u1eb7c kh\u00f4ng kh\u00ed. N\u00f3 c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 c\u1ee9ng.&nbsp;<\/p><h3 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i<\/h3><p>L\u00e0m n\u00f3ng l\u1ea1i th\u00e9p \u0111\u00e3 t\u00f4i \u1edf nhi\u1ec7t \u0111\u1ed9 150-370\u00b0C (302-698\u00b0F) \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai c\u1ea7n thi\u1ebft.<\/p><h3 class=\"wp-block-heading\">Bi\u1ec3u \u0111\u1ed3 t\u00f4i luy\u1ec7n th\u00e9p kh\u00f4ng g\u1ec9 420<\/h3><p>Sau \u0111\u00e2y l\u00e0 bi\u1ec3u \u0111\u1ed3 t\u00f4i luy\u1ec7n chung cho th\u00e9p kh\u00f4ng g\u1ec9 420. Bi\u1ec3u \u0111\u1ed3 n\u00e0y cho th\u1ea5y m\u1ed1i quan h\u1ec7 gi\u1eefa nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n v\u00e0 \u0111\u1ed9 c\u1ee9ng thu \u0111\u01b0\u1ee3c.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Nhi\u1ec7t \u0111\u1ed9<\/strong><\/td><td><strong>Nhi\u1ec7t \u0111\u1ed9<\/strong><\/td><td><strong>\u0110\u1ed9 c\u1ee9ng<\/strong><\/td><\/tr><tr><td>150\u00b0C<\/td><td>302\u00b0F<\/td><td>54-56 HRC<\/td><\/tr><tr><td>200\u00b0C<\/td><td>392\u00b0F<\/td><td>52-54 HRC<\/td><\/tr><tr><td>250\u00b0C<\/td><td>482\u00b0F<\/td><td>50-52HRC<\/td><\/tr><tr><td>300\u00b0C<\/td><td>572\u00b0F<\/td><td>48-50HRC<\/td><\/tr><tr><td>400\u00b0C<\/td><td>752\u00b0F<\/td><td>45-47 HRC<\/td><\/tr><tr><td>500\u00b0C<\/td><td>932\u00b0F<\/td><td>40-42 HRC<\/td><\/tr><tr><td>600\u00b0C<\/td><td>1112\u00b0F<\/td><td>35-37 HRC<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf bi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><h3 class=\"wp-block-heading\">L\u00e0m vi\u1ec7c n\u00f3ng<\/h3><ul class=\"wp-block-list\"><li>C\u00e1n n\u00f3ng<\/li><\/ul><p>\u0110\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 1100\u00b0C \u0111\u1ebfn 900\u00b0C (2012\u00b0F \u0111\u1ebfn 1652\u00b0F) \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh th\u00e9p th\u00e0nh t\u1ea5m, l\u00e1 ho\u1eb7c thanh.<\/p><ul class=\"wp-block-list\"><li>R\u00e8n<\/li><\/ul><p>Th\u00e9p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c r\u00e8n n\u00f3ng trong c\u00f9ng ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 t\u1ea1o ra h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh.<\/p><h3 class=\"wp-block-heading\">L\u00e0m vi\u1ec7c l\u1ea1nh<\/h3><ul class=\"wp-block-list\"><li>V\u1ebd l\u1ea1nh<\/li><\/ul><p>Th\u00e9p \u0111\u01b0\u1ee3c k\u00e9o qua khu\u00f4n \u0111\u1ec3 gi\u1ea3m di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang, c\u1ea3i thi\u1ec7n b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc.<\/p><p>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t d\u00e2y, thanh v\u00e0 \u1ed1ng c\u00f3 k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c.<\/p><ul class=\"wp-block-list\"><li>T\u1ea1o h\u00ecnh l\u1ea1nh<\/li><\/ul><p>Th\u00e9p \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng ho\u1eb7c k\u00edch th\u01b0\u1edbc c\u1ee5 th\u1ec3.<\/p><p>T\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng nh\u1edd qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n.<\/p><ul class=\"wp-block-list\"><li>L\u01b0u \u00fd: Bi\u1ebfn d\u1ea1ng qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 g\u00e2y n\u1ee9t do \u0111\u1ed9 d\u1ebbo h\u1ea1n ch\u1ebf.<\/li><\/ul><h3 class=\"wp-block-heading\">Gia c\u00f4ng<\/h3><p>Th\u1ef1c hi\u1ec7n t\u1ed1t nh\u1ea5t \u1edf \u0111i\u1ec1u ki\u1ec7n \u1ee7 khi th\u00e9p m\u1ec1m h\u01a1n.<\/p><p>Th\u00e9p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gia c\u00f4ng b\u1eb1ng d\u1ee5ng c\u1ee5 cacbua ho\u1eb7c th\u00e9p t\u1ed1c \u0111\u1ed9 cao, v\u1edbi ch\u1ea5t l\u00e0m m\u00e1t v\u00e0 b\u00f4i tr\u01a1n th\u00edch h\u1ee3p.<\/p><h3 class=\"wp-block-heading\">H\u00e0n<\/h3><p>L\u00e0m n\u00f3ng th\u00e9p \u1edf nhi\u1ec7t \u0111\u1ed9 150\u2013320\u00b0C (302\u2013608\u00b0F) \u0111\u1ec3 gi\u1ea3m nguy c\u01a1 n\u1ee9t.<\/p><p>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u \u0111\u1ed9n t\u01b0\u01a1ng th\u00edch, ch\u1eb3ng h\u1ea1n nh\u01b0 AWS E\/ER420 ho\u1eb7c v\u1eadt li\u1ec7u \u0111\u1ed9n th\u00e9p kh\u00f4ng g\u1ec9 austenit.<\/p><p>Th\u1ef1c hi\u1ec7n \u1ee7 ho\u1eb7c ram sau khi h\u00e0n \u0111\u1ec3 gi\u1ea3m \u1ee9ng su\u1ea5t v\u00e0 gi\u1ea3m \u0111\u1ed9 c\u1ee9ng.<\/p><h3 class=\"wp-block-heading\">M\u00e0i v\u00e0 \u0111\u00e1nh b\u00f3ng<\/h3><p>\u0110\u1ea1t \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c v\u00e0 b\u1ec1 m\u1eb7t nh\u1eb5n m\u1ecbn.<\/p><p>C\u1ea7n thi\u1ebft cho c\u00e1c s\u1ea3n ph\u1ea9m nh\u01b0 dao k\u00e9o v\u00e0 d\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt v\u00ec \u0111\u1ed9 s\u1eafc b\u00e9n v\u00e0 t\u00ednh th\u1ea9m m\u1ef9 r\u1ea5t quan tr\u1ecdng.<\/p><h3 class=\"wp-block-heading\">K\u1ebft th\u00fac<\/h3><p>X\u1eed l\u00fd b\u1ec1 m\u1eb7t: C\u00e1c quy tr\u00ecnh nh\u01b0 th\u1ee5 \u0111\u1ed9ng h\u00f3a, \u0111\u00e1nh b\u00f3ng \u0111i\u1ec7n ho\u1eb7c ph\u1ee7 l\u1edbp \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 th\u1ea9m m\u1ef9.<\/p><p>L\u1edbp ph\u1ee7: \u00c1p d\u1ee5ng c\u00e1c l\u1edbp b\u1ea3o v\u1ec7 nh\u01b0 th\u1ea5m nit\u01a1 ho\u1eb7c l\u1eafng \u0111\u1ecdng h\u01a1i v\u1eadt l\u00fd (PVD) \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n.<\/p><h3 class=\"wp-block-heading\">Ho\u00e0n thi\u1ec7n d\u00e2y<\/h3><p>Ri\u00eang \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m d\u00e2y \u0111i\u1ec7n, bao g\u1ed3m:<\/p><ul class=\"wp-block-list\"><li>\u0110\u1ed9 ho\u00e0n thi\u1ec7n s\u00e1ng b\u00f3ng: \u0110\u1ea1t \u0111\u01b0\u1ee3c th\u00f4ng qua qu\u00e1 tr\u00ecnh \u1ee7 c\u00f3 ki\u1ec3m so\u00e1t v\u00e0 x\u1eed l\u00fd b\u1ec1 m\u1eb7t \u0111\u1ec3 c\u00f3 v\u1ebb ngo\u00e0i s\u00e1ng b\u00f3ng.<\/li>\n\n<li>Ho\u00e0n thi\u1ec7n m\u1edd: \u0110\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch t\u1ea9y c\u1eb7n c\u01a1 h\u1ecdc ho\u1eb7c ng\u00e2m axit \u0111\u1ec3 c\u00f3 b\u1ec1 m\u1eb7t x\u1ec9n m\u00e0u.<\/li>\n\n<li>M\u1ea1: Ph\u1ee7 c\u00e1c kim lo\u1ea1i nh\u01b0 k\u1ebdm ho\u1eb7c thi\u1ebfc \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n\n<li>L\u1edbp ph\u1ee7 b\u00f4i tr\u01a1n: D\u00e0nh cho d\u00e2y d\u00f9ng \u0111\u1ec3 k\u00e9o ho\u1eb7c t\u1ea1o h\u00ecnh ngu\u1ed9i th\u00eam.<\/li><\/ul><h2 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 420 v\u00e0 c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c<\/h2><h4 class=\"wp-block-heading\">440 so v\u1edbi 420<\/h4><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 12-14% crom v\u00e0 0,15-0,40% cacbon. N\u00f3 m\u1ec1m h\u01a1n, c\u00f3 \u0111\u1ed9 c\u1ee9ng 50-54 HRC. <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-440\/\">th\u00e9p kh\u00f4ng g\u1ec9 440<\/a> c\u00f3 nhi\u1ec1u crom h\u01a1n (16-18%) v\u00e0 nhi\u1ec1u carbon h\u01a1n (0,6-1,2%), mang l\u1ea1i \u0111\u1ed9 c\u1ee9ng 58-62 HRC. \u0110i\u1ec1u n\u00e0y l\u00e0m cho 440 c\u1ee9ng h\u01a1n v\u00e0 b\u1ec1n h\u01a1n.<\/li><\/ul><ul class=\"wp-block-list\"><li>Inox 440 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao t\u1ed1t h\u01a1n, \u00edt b\u1ecb cong v\u00eanh h\u01a1n so v\u1edbi inox 420.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p 420 d\u1ec5 gia c\u00f4ng v\u00e0 h\u00e0n h\u01a1n.&nbsp;<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 440 \u0111\u1eaft h\u01a1n.<\/li><\/ul><h4 class=\"wp-block-heading\">410(UNS S41000) so v\u1edbi 420<\/h4><ul class=\"wp-block-list\"><li><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-410\/\">th\u00e9p kh\u00f4ng g\u1ec9 410<\/a> ch\u1ee9a 11,5-13,5% crom v\u00e0 0,08-0,15% cacbon. Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 12-14% crom v\u00e0 0,15-0,40% cacbon, l\u00e0m cho n\u00f3 c\u1ee9ng h\u01a1n v\u00e0 b\u1ec1n h\u01a1n th\u00e9p 410.&nbsp;<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p 420 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n t\u1ed1t h\u01a1n v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng gi\u1eef c\u1ea1nh s\u1eafc h\u01a1n v\u00ec c\u00f3 h\u00e0m l\u01b0\u1ee3ng carbon cao h\u01a1n.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 410 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n. \u1ede nhi\u1ec7t \u0111\u1ed9 cao l\u00ean \u0111\u1ebfn 650\u00b0C, 420 d\u1ec5 b\u1ecb m\u1ea5t c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 410 d\u1ec5 gia c\u00f4ng v\u00e0 h\u00e0n h\u01a1n. V\u00ec n\u00f3 c\u00f3 h\u00e0m l\u01b0\u1ee3ng carbon th\u1ea5p h\u01a1n. N\u00f3 c\u0169ng c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 420.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 410 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong dao k\u00e9o, l\u01b0\u1ee1i tua bin h\u01a1i n\u01b0\u1edbc v\u00e0 ph\u1ee5 t\u00f9ng \u00f4 t\u00f4. Th\u00e9p kh\u00f4ng g\u1ec9 420 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1eaft thi\u1ebft b\u1ecb, m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p v\u00e0 dao m\u1ed5.<\/li><\/ul><h4 class=\"wp-block-heading\">316 so v\u1edbi 420<\/h4><ul class=\"wp-block-list\"><li><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-316\/\">th\u00e9p kh\u00f4ng g\u1ec9 316<\/a> c\u00f3 h\u00e0m l\u01b0\u1ee3ng crom 16-18%, h\u00e0m l\u01b0\u1ee3ng niken 10-14% v\u00e0 h\u00e0m l\u01b0\u1ee3ng molypden 2-3%. Th\u00e0nh ph\u1ea7n n\u00e0y mang l\u1ea1i cho 316 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i nh\u01b0ng l\u00e0m cho n\u00f3 k\u00e9m c\u1ee9ng h\u01a1n 420.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 316 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n, duy tr\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a n\u00f3 l\u00ean \u0111\u1ebfn kho\u1ea3ng 870\u00b0C (1598\u00b0F). Th\u00e9p kh\u00f4ng g\u1ec9 420 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn kho\u1ea3ng 700\u00b0C (1292\u00b0F) nh\u01b0ng m\u1ea5t \u0111i c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 420 d\u1ec5 gia c\u00f4ng h\u01a1n v\u00ec \u0111\u1ed9 c\u1ee9ng th\u1ea5p h\u01a1n. Th\u00e9p kh\u00f4ng g\u1ec9 316 \u0111\u1eaft h\u01a1n v\u00ec ch\u1ee9a nhi\u1ec1u niken v\u00e0 molypden h\u01a1n.<\/li><\/ul><ul class=\"wp-block-list\"><li>Th\u00e9p kh\u00f4ng g\u1ec9 316 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m. Th\u00e9p kh\u00f4ng g\u1ec9 420 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong dao k\u00e9o, dao m\u1ed5, l\u01b0\u1ee1i dao v\u00e0 m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p.<\/li><\/ul><h2 class=\"wp-block-heading\">C\u00e1c d\u1ea1ng kh\u00e1c nhau c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><p>Sau \u0111\u00e2y l\u00e0 nh\u1eefng h\u00ecnh th\u1ee9c ph\u1ed5 bi\u1ebfn nh\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p><h3 class=\"wp-block-heading\">T\u1edd gi\u1ea5y<\/h3><p><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/sheet\/420-sheet\/\">T\u1ea5m th\u00e9p kh\u00f4ng g\u1ec9 420<\/a> ph\u1eb3ng v\u00e0 m\u1ecfng, th\u01b0\u1eddng d\u00e0y t\u1eeb 0,5 mm \u0111\u1ebfn 3 mm. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 d\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp v\u00e0 d\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt.<\/p><h3 class=\"wp-block-heading\">Thanh<\/h3><p>Thanh c\u00f3 th\u1ec3 l\u00e0 c\u00e1c kh\u1ed1i h\u00ecnh tr\u1ee5 ho\u1eb7c h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1eb7c. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong gia c\u00f4ng, r\u00e8n v\u00e0 c\u00e1c quy tr\u00ecnh ch\u1ebf t\u1ea1o kh\u00e1c \u0111\u1ec3 t\u1ea1o ra c\u00e1c b\u1ed9 ph\u1eadn nh\u01b0 b\u00e1nh r\u0103ng, tr\u1ee5c v\u00e0 ch\u1ed1t.<\/p><h3 class=\"wp-block-heading\">\u0110\u0129a<\/h3><p>T\u1ea5m d\u00e0y h\u01a1n t\u1ea5m, th\u01b0\u1eddng d\u00e0y h\u01a1n 6 mm. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng n\u1eb7ng nh\u01b0 th\u00e0nh ph\u1ea7n k\u1ebft c\u1ea5u v\u00e0 m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p.<\/p><h3 class=\"wp-block-heading\">D\u1ea3i<\/h3><p>D\u1ea3i l\u00e0 nh\u1eefng mi\u1ebfng m\u1ecfng, ph\u1eb3ng gi\u1ed1ng nh\u01b0 t\u1ea5m nh\u01b0ng th\u01b0\u1eddng h\u1eb9p h\u01a1n. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t l\u00f2 xo, l\u01b0\u1ee1i dao v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c \u0111\u00f2i h\u1ecfi k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c v\u00e0 t\u00ednh linh ho\u1ea1t.<\/p><h3 class=\"wp-block-heading\">D\u00e2y \u0111i\u1ec7n<\/h3><p>D\u00e2y th\u00e9p kh\u00f4ng g\u1ec9 420 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi v\u1eadt li\u1ec7u m\u1ecbn, m\u1ec1m d\u1ebbo, ch\u1eb3ng h\u1ea1n nh\u01b0 trong thi\u1ebft b\u1ecb y t\u1ebf, l\u00f2 xo v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i \u1ed1c v\u00edt nh\u1ea5t \u0111\u1ecbnh.<\/p><h2 class=\"wp-block-heading\">Nh\u1eefng \u0111i\u1ec1u kh\u00e1c b\u1ea1n n\u00ean bi\u1ebft v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 420<\/h2><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u1ed1t kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 420 th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 c\u1ee9ng cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u1eeba ph\u1ea3i, ch\u1eb3ng h\u1ea1n nh\u01b0 dao, d\u1ee5ng c\u1ee5 ph\u1eabu thu\u1eadt v\u00e0 d\u1ee5ng c\u1ee5 nha khoa.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u1ed1t \u0111\u1ec3 l\u00e0m dao kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 420 th\u00edch h\u1ee3p \u0111\u1ec3 l\u00e0m dao; n\u00f3 c\u00f3 \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t, ph\u00f9 h\u1ee3p \u0111\u1ec3 l\u00e0m l\u01b0\u1ee1i dao v\u00e0 dao k\u00e9o gi\u00e1 r\u1ebb.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 t\u00ednh t\u1eeb v\u00ec n\u00f3 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 martensitic.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 420 c\u00f3 an to\u00e0n cho th\u1ef1c ph\u1ea9m kh\u00f4ng?<\/h3><p>C\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 420 \u0111\u01b0\u1ee3c coi l\u00e0 an to\u00e0n cho th\u1ef1c ph\u1ea9m. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 c\u1ee9ng t\u1ed1t c\u1ee7a n\u00f3 l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p cho thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, dao k\u00e9o v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c ti\u1ebfp x\u00fac v\u1edbi th\u1ef1c ph\u1ea9m.<\/p><h2 class=\"wp-block-heading\">T\u00f3m t\u1eaft &amp; Th\u00eam n\u1eefa<\/h2><p>B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn v\u1ec1 \u0111\u1ecbnh ngh\u0129a, th\u00e0nh ph\u1ea7n, \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng kh\u00e1c c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 402. \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c c\u00e1c lo\u1ea1i th\u00e9p kh\u00e1c, h\u00e3y xem <a href=\"https:\/\/steelprogroup.com\/vi\/blog\/\">blog c\u1ee7a ch\u00fang t\u00f4i<\/a> ho\u1eb7c <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">li\u00ean h\u1ec7 v\u1edbi c\u00e1c chuy\u00ean gia kim lo\u1ea1i c\u1ee7a ch\u00fang t\u00f4i<\/a>.<\/p><p>L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 cung c\u1ea5p gi\u1ea3i ph\u00e1p h\u00e0ng \u0111\u1ea7u v\u1ec1 th\u00e9p chuy\u00ean d\u1ee5ng, ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u1ee9ng d\u1ee5ng \u0111a ng\u00e0nh v\u00e0 d\u1ecbch v\u1ee5 t\u00f9y ch\u1ec9nh v\u1edbi cam k\u1ebft ch\u1ea5t l\u01b0\u1ee3ng 100%, cam k\u1ebft ph\u00e1t tri\u1ec3n c\u00f9ng kh\u00e1ch h\u00e0ng. Gh\u00e9 th\u0103m <a href=\"https:\/\/steelprogroup.com\/vi\">trang web c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 t\u00ecm hi\u1ec3u th\u00eam, ho\u1eb7c <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">g\u1eedi cho ch\u00fang t\u00f4i m\u1ed9t b\u00e1o gi\u00e1<\/a>v\u00e0 ch\u00fang t\u00f4i s\u1ebd li\u00ean h\u1ec7 v\u1edbi b\u1ea1n s\u1edbm!<\/p>","protected":false},"excerpt":{"rendered":"<p>Th\u00e9p kh\u00f4ng g\u1ec9 420 n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 s\u1eafc b\u00e9n trong khi v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t. N\u00f3 l\u00e0 [\u2026]<\/p>","protected":false},"author":1,"featured_media":8610,"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":[4191,112],"tags":[],"class_list":["post-8612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grades","category-stainless-steel"],"acf":[],"_links":{"self":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/8612","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=8612"}],"version-history":[{"count":0,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/posts\/8612\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media\/8610"}],"wp:attachment":[{"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/media?parent=8612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/categories?post=8612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/steelprogroup.com\/vi\/wp-json\/wp\/v2\/tags?post=8612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}