{"id":11618,"date":"2024-10-11T02:29:00","date_gmt":"2024-10-10T18:29:00","guid":{"rendered":"https:\/\/app11147.cloudwayssites.com\/?p=11618"},"modified":"2024-11-21T11:06:12","modified_gmt":"2024-11-21T03:06:12","slug":"grade-347","status":"publish","type":"post","link":"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-347\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 347: Th\u00e0nh ph\u1ea7n, T\u00ednh ch\u1ea5t, \u1ee8ng d\u1ee5ng, H\u00ecnh th\u1ee9c, X\u1eed l\u00fd, So s\u00e1nh v\u00e0 Th\u00eam n\u1eefa"},"content":{"rendered":"<p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o th\u00e0nh ph\u1ea7n, t\u00ednh ch\u1ea5t, \u1ee9ng d\u1ee5ng, \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m, h\u00ecnh d\u1ea1ng v\u00e0 qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347 trong khi so s\u00e1nh n\u00f3 v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 ph\u1ed5 bi\u1ebfn kh\u00e1c nh\u01b0 316, 304 v\u00e0 321. Cho d\u00f9 b\u1ea1n l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t, k\u1ef9 s\u01b0 hay nh\u00e0 cung c\u1ea5p, vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c nh\u1eefng l\u1ee3i \u00edch c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347 s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1ed1t nh\u1ea5t cho d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 347 l\u00e0 g\u00ec?<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 347 l\u00e0 h\u1ee3p kim th\u00e9p kh\u00f4ng g\u1ec9 austenit crom-niken \u0111\u01b0\u1ee3c \u1ed5n \u0111\u1ecbnh b\u1eb1ng niobi (columbi) \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 k\u1ebft t\u1ee7a crom cacbua. H\u1ee3p kim n\u00e0y n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong ph\u1ea1m vi 800-1500\u00b0F. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd h\u00f3a ch\u1ea5t, h\u1ec7 th\u1ed1ng x\u1ea3 nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng n\u1ed3i h\u01a1i.<\/p><h3 class=\"wp-block-heading\">C\u1ea5p \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347<\/h3><ul class=\"wp-block-list\"><li>UNS S34700<\/li>\n\n<li>WNR 1.4550<\/li>\n\n<li>DIN X10CrNiNb18-9<\/li>\n\n<li>BS 347S17<\/li>\n\n<li>SAE 30347<\/li><\/ul><h3 class=\"wp-block-heading\">Ti\u00eau chu\u1ea9n th\u00e9p kh\u00f4ng g\u1ec9 347<\/h3><p>ASTM A240, ASTM A182, ASTM A276, ASTM A312, ASTM A358, ASTM A403<\/p><h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347<\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td>Y\u1ebfu t\u1ed1<\/td><td>Ph\u1ea1m vi th\u00e0nh ph\u1ea7n<\/td><\/tr><tr><td>Cacbon (C)<\/td><td>\u2264 0,08%<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>\u2264 2,00%<\/td><\/tr><tr><td>Silic (Si)<\/td><td>\u2264 1,00%<\/td><\/tr><tr><td>Crom (Cr)<\/td><td>17.0% &#8211; 19.0%<\/td><\/tr><tr><td>Niken (Ni)<\/td><td>9.0% &#8211; 13.0%<\/td><\/tr><tr><td>L\u01b0u hu\u1ef3nh (S)<\/td><td>\u2264 0,030%<\/td><\/tr><tr><td>Ph\u1ed1t pho (P)<\/td><td>\u2264 0,045%<\/td><\/tr><tr><td>Niobi (Nb) + Tantan (Ta)<\/td><td>10x C t\u1ed1i thi\u1ec3u \u2013 1,0% t\u1ed1i \u0111a<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">347 T\u00ednh ch\u1ea5t c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9<\/h2><h3 class=\"wp-block-heading\">C\u00e1c t\u00ednh n\u0103ng ch\u00ednh<\/h3><p><strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao:<\/strong> C\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao trong th\u1eddi gian d\u00e0i (l\u00ean t\u1edbi 1500\u00b0F\/816\u00b0C) m\u00e0 kh\u00f4ng b\u1ecb m\u1ea5t t\u00ednh to\u00e0n v\u1eb9n v\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc.<\/p><p><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t:<\/strong> Qu\u00e1 tr\u00ecnh \u1ed5n \u0111\u1ecbnh niobi ng\u0103n ng\u1eeba s\u1ef1 k\u1ebft t\u1ee7a cacbua, tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea1y c\u1ea3m v\u00e0 tho\u00e1i h\u00f3a trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p><p><strong>Kh\u1ea3 n\u0103ng h\u00e0n v\u01b0\u1ee3t tr\u1ed9i:<\/strong> C\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng h\u00e0n b\u1eb1ng h\u1ea7u h\u1ebft c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n, \u00edt c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n.<\/p><p><strong>S\u1ee9c ch\u1ecbu k\u00e9o tuy\u1ec7t v\u1eddi: <\/strong>N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng do k\u00e9o d\u00e0i trong \u0111i\u1ec1u ki\u1ec7n \u1ee9ng su\u1ea5t cao k\u00e9o d\u00e0i.<\/p><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd<\/h3><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>T\u1ec9 tr\u1ecdng<\/td><td>7,7 \u2013 8,03 g\/cm\u00b3 (0,278 \u2013 0,290 lb\/in\u00b3)<\/td><\/tr><tr><td>\u0110i\u1ec3m n\u00f3ng ch\u1ea3y<\/td><td>1371 \u2013 1400\u00b0C (2500 \u2013 2550\u00b0F)<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td><td>16,3 W\/m\u00b7K (212\u00b0F)<\/td><\/tr><tr><td>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/td><td>10,5 x 10\u207b\u2076\/\u00b0C (20-600\u00b0C)<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf su\u1ea5t<\/td><td>72 \u00b5\u03a9\u00b7cm (20\u00b0C)<\/td><\/tr><tr><td>Nhi\u1ec7t dung ri\u00eang<\/td><td>500 J\/kg\u00b7K (0 \u2013 100\u00b0C)<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3><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 (UTS)<\/td><td>515 MPa ph\u00fat (75 ksi ph\u00fat)<\/td><\/tr><tr><td>Gi\u1edbi h\u1ea1n ch\u1ea3y (\u0110\u1ed9 l\u1ec7ch 0,2%)<\/td><td>205 MPa ph\u00fat (30 ksi ph\u00fat)<\/td><\/tr><tr><td>\u0110\u1ed9 gi\u00e3n d\u00e0i<\/td><td>40% ph\u00fat<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (Brinell)<\/td><td>T\u1ed1i \u0111a 201<\/td><\/tr><tr><td>\u0110\u1ed9 c\u1ee9ng (Rockwell B)<\/td><td>95 t\u1ed1i \u0111a<\/td><\/tr><tr><td>M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td><td>190 \u2013 210 GPa (27557 \u2013 30458 ksi)<\/td><\/tr><tr><td>T\u1ef7 s\u1ed1 Poisson<\/td><td>0,27 \u2013 0,30<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n k\u00e9o d\u00e0i (\u1edf 750\u00b0C)<\/td><td>38 \u2013 39 MPa (5510 \u2013 5660 psi)<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n \u0111\u1ee9t g\u00e3y (\u1edf 750\u00b0C)<\/td><td>38 \u2013 39 MPa (5510 \u2013 5660 psi) (100.000 gi\u1edd)<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n va \u0111\u1eadp (Charpy V-notch)<\/td><td>60 J (D\u1ecdc) \/ 40 J (Ngang)<\/td><\/tr><tr><td>\u0110\u1ed9 b\u1ec1n m\u1ecfi (U\u1ed1n cong khi quay, \u1edf 20\u00b0C)<\/td><td>240 MPa (34,8 ksi)<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\">C\u00e1c d\u1ea1ng th\u00e9p kh\u00f4ng g\u1ec9 347<\/h2><p>Th\u00e9p kh\u00f4ng g\u1ec9 347 m\u00e0 ch\u00fang t\u00f4i cung c\u1ea5p c\u00f3 nhi\u1ec1u d\u1ea1ng s\u1ea3n ph\u1ea9m kh\u00e1c nhau, t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc tuy\u1ec7t v\u1eddi v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u c\u00f4ng nghi\u1ec7p kh\u00e1c nhau.<\/p><p><strong>Thanh: <\/strong>Thanh th\u00e9p kh\u00f4ng g\u1ec9 347 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c th\u00e0nh ph\u1ea7n k\u1ebft c\u1ea5u, tr\u1ee5c, ch\u1ed1t v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn gia c\u00f4ng. C\u00e1c thanh n\u00e0y c\u00f3 nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau, bao g\u1ed3m h\u00ecnh tr\u00f2n, h\u00ecnh vu\u00f4ng v\u00e0 h\u00ecnh l\u1ee5c gi\u00e1c.<\/p><p><strong>T\u1ea5m v\u00e0 T\u1ea5m: <\/strong><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/plate\/347-plate-sheet\/\">T\u1ea5m v\u00e0 t\u1ea5m th\u00e9p kh\u00f4ng g\u1ec9 347<\/a> l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 thi\u1ebft b\u1ecb x\u1eed l\u00fd h\u00f3a ch\u1ea5t v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t. H\u00ecnh d\u1ea1ng m\u1ecfng v\u00e0 ph\u1eb3ng c\u1ee7a ch\u00fang gi\u00fap ch\u00fang d\u1ec5 c\u1eaft, u\u1ed1n cong v\u00e0 x\u1eed l\u00fd th\u00e0nh h\u00ecnh d\u1ea1ng mong mu\u1ed1n. T\u1ea5m th\u00e9p kh\u00f4ng g\u1ec9 347 d\u00e0y h\u01a1n t\u1ea5m v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i n\u1eb7ng nh\u01b0 b\u00ecnh ch\u1ecbu \u00e1p su\u1ea5t, t\u1ea5m ch\u1eafn nhi\u1ec7t v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn n\u1ed3i h\u01a1i.<\/p><p><strong>\u1ed0ng v\u00e0 \u1ed0ng d\u1eabn:<\/strong> \u1ed0ng l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 347 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u00f3a d\u1ea7u, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 ph\u00e1t \u0111i\u1ec7n. Ch\u00fang c\u00f3 th\u1ec3 v\u1eadn chuy\u1ec3n ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p><p><strong>Thanh tr\u00f2n:<\/strong> Thanh tr\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, x\u00e2y d\u1ef1ng v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed, c\u00f3 \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng \u1ee9ng su\u1ea5t.<\/p><p><strong>Cu\u1ed9n, D\u00e2y v\u00e0 L\u00e1: <\/strong>Nh\u1edd t\u00ednh linh ho\u1ea1t v\u00e0 \u0111\u1ed9 b\u1ec1n, nh\u1eefng h\u00ecnh d\u1ea1ng tinh x\u1ea3o n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ee9c t\u1ea1p nh\u01b0 linh ki\u1ec7n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, d\u00e2y \u0111i\u1ec7n v\u00e0 th\u1eadm ch\u00ed c\u1ea3 \u1ee9ng d\u1ee5ng trang tr\u00ed.<\/p><p><strong>L\u01b0\u1edbi, L\u01b0\u1edbi th\u00e9p &amp; M\u00e0n h\u00ecnh: <\/strong>\u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng l\u1ecdc, m\u00e0n h\u00ecnh v\u00e0 b\u1ed9 t\u00e1ch, l\u01b0\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 347 ho\u1eb7c l\u01b0\u1edbi kim lo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n cao v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao. \u0110i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 l\u00fd t\u01b0\u1edfng cho c\u00e1c nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u, h\u00f3a ch\u1ea5t v\u00e0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m.<\/p><p><strong>\u0110\u00fac: <\/strong>Th\u00e9p kh\u00f4ng g\u1ec9 347 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00fac th\u00e0nh nhi\u1ec1u h\u00ecnh d\u1ea1ng kh\u00e1c nhau cho c\u00e1c linh ki\u1ec7n c\u00f4ng nghi\u1ec7p \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao c\u0169ng nh\u01b0 ch\u1ed1ng \u0103n m\u00f2n.<\/p><p><strong>Que h\u00e0n v\u00e0 que h\u00e0n ph\u1ee5:<\/strong> Que h\u00e0n l\u00e0m t\u1eeb th\u00e9p kh\u00f4ng g\u1ec9 347 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 n\u1ed1i c\u00e1c th\u00e0nh ph\u1ea7n trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 kh\u00f4ng c\u00f3 nguy c\u01a1 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t.<\/p><h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347<\/h2><p>Nh\u1edd nh\u1eefng t\u00ednh ch\u1ea5t \u0111\u1ed9c \u0111\u00e1o c\u1ee7a m\u00ecnh, th\u00e9p kh\u00f4ng g\u1ec9 347 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u00f2i h\u1ecfi kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 b\u1ec1n ch\u1ed1ng \u0103n m\u00f2n.&nbsp;<\/p><p><strong>Linh ki\u1ec7n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5: <\/strong>Bao g\u1ed3m h\u1ec7 th\u1ed1ng x\u1ea3 kh\u00ed, v\u00f2ng thu nhi\u1ec7t v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/p><p><strong>X\u1eed l\u00fd h\u00f3a h\u1ecdc:<\/strong> Th\u00edch h\u1ee3p \u0111\u1ec3 x\u1eed l\u00fd v\u1eadt li\u1ec7u \u0103n m\u00f2n v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u1ea5u tr\u00fac khi ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p><p><strong>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m: <\/strong>T\u00ednh ch\u1ea5t kh\u00f4ng nhi\u1ec5m t\u1eeb, ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a n\u00f3 l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng cho c\u00e1c thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m v\u00e0 b\u1ec3 ch\u1ee9a.<\/p><p><strong>\u1ed0ng n\u1ed3i h\u01a1i v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t:<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 1000\u00b0F, th\u00e9p kh\u00f4ng g\u1ec9 347 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t.<\/p><p><strong>S\u1ea3n xu\u1ea5t \u0111i\u1ec7n: <\/strong>\u0110\u01b0\u1eddng \u1ed1ng h\u01a1i, t\u1ea5m ch\u1eafn nhi\u1ec7t v\u00e0 tua bin \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb kh\u1ea3 n\u0103ng duy tr\u00ec \u0111\u1ed9 b\u1ec1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a 347.<\/p><h2 class=\"wp-block-heading\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347<\/h2><h3 class=\"wp-block-heading\">Thu\u1eadn l\u1ee3i<\/h3><ol class=\"wp-block-list\"><li>Hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 cao tuy\u1ec7t v\u1eddi: Th\u00edch h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng l\u00e2u d\u00e0i trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n\n<li>Ng\u0103n ng\u1eeba nh\u1ea1y c\u1ea3m: \u1ed4n \u0111\u1ecbnh niobi ng\u0103n ng\u1eeba k\u1ebft t\u1ee7a cacbua v\u00e0 l\u00e0m gi\u1ea3m nguy c\u01a1 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t.<\/li>\n\n<li>Kh\u1ea3 n\u0103ng h\u00e0n t\u1ed1t: C\u00f3 th\u1ec3 h\u00e0n m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t \u0111i t\u00ednh ch\u1ea5t ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n\n<li>Kh\u00f4ng nhi\u1ec5m t\u1eeb trong \u0111i\u1ec1u ki\u1ec7n \u1ee7: Th\u00edch h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 th\u1ec3 lo ng\u1ea1i v\u1ec1 t\u1eeb t\u00ednh.<\/li><\/ol><h3 class=\"wp-block-heading\">Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3><ol class=\"wp-block-list\"><li>Chi ph\u00ed cao h\u01a1n: \u0110\u1eaft h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p th\u00f4ng th\u01b0\u1eddng nh\u01b0 304 v\u00e0 316 do c\u00f3 ch\u1ee9a niobi.<\/li>\n\n<li>Kh\u1ea3 n\u0103ng gia c\u00f4ng th\u1ea5p h\u01a1n: V\u1edbi kh\u1ea3 n\u0103ng gia c\u00f4ng kho\u1ea3ng 36%, lo\u1ea1i th\u00e9p n\u00e0y kh\u00f3 gia c\u00f4ng h\u01a1n c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c.<\/li>\n\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng clorua h\u1ea1n ch\u1ebf: Kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec1u clorua, ch\u1eb3ng h\u1ea1n nh\u01b0 \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i, n\u01a1i c\u00f3 th\u1ec3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng r\u1ed7 v\u00e0 \u0103n m\u00f2n khe h\u1edf.<\/li><\/ol><h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf bi\u1ebfn th\u00e9p kh\u00f4ng g\u1ec9 347 l\u00e0 g\u00ec?<\/h2><h3 class=\"wp-block-heading\">H\u00ecnh th\u00e0nh<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 347 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh h\u00ecnh t\u1ed1t, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c lo\u1ea1i th\u00e9p austenit kh\u00e1c. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh b\u1eb1ng nhi\u1ec1u quy tr\u00ecnh \u0111\u1ecbnh h\u00ecnh kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 k\u00e9o s\u00e2u v\u00e0 d\u1eadp. Tuy nhi\u00ean, n\u00f3 c\u00f3 th\u1ec3 c\u1ea7n l\u1ef1c cao h\u01a1n do \u0111\u1ed9 b\u1ec1n c\u1ee7a n\u00f3.<\/p><h3 class=\"wp-block-heading\">H\u00e0n<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 347 r\u1ea5t th\u00edch h\u1ee3p \u0111\u1ec3 h\u00e0n, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n li\u00ean h\u1ea1t tuy\u1ec7t v\u1eddi sau khi h\u00e0n nh\u1edd t\u00ednh \u1ed5n \u0111\u1ecbnh niobi.<\/p><ul class=\"wp-block-list\"><li>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u00e0n ph\u1ed5 bi\u1ebfn bao g\u1ed3m <strong>TIG<\/strong>, <strong>MIG<\/strong>, V\u00e0 <strong>h\u00e0n \u0111i\u1ec7n tr\u1edf<\/strong>.<\/li>\n\n<li>Th\u00f4ng th\u01b0\u1eddng kh\u00f4ng c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t sau khi h\u00e0n, nh\u01b0ng n\u00ean s\u1eed d\u1ee5ng kim lo\u1ea1i h\u00e0n 347 \u0111\u1ec3 duy tr\u00ec c\u00e1c t\u00ednh ch\u1ea5t t\u01b0\u01a1ng t\u1ef1 t\u1ea1i m\u1ed1i h\u00e0n.<\/li><\/ul><h3 class=\"wp-block-heading\">C\u1eaft<\/h3><p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u1eaft ti\u00eau chu\u1ea9n cho th\u00e9p kh\u00f4ng g\u1ec9 347 bao g\u1ed3m:<\/p><ul class=\"wp-block-list\"><li>C\u1eaft plasma<\/li>\n\n<li>C\u1eaft laser<\/li>\n\n<li>C\u1eaft tia n\u01b0\u1edbc<\/li>\n\n<li>Ph\u01b0\u01a1ng ph\u00e1p c\u01a1 h\u1ecdc nh\u01b0 c\u01b0a<\/li><\/ul><p>Do \u0111\u1ed9 c\u1ee9ng cao h\u01a1n n\u00ean d\u1ee5ng c\u1ee5 c\u00f3 \u0111\u1ea7u cacbua \u0111\u01b0\u1ee3c khuy\u00ean d\u00f9ng \u0111\u1ec3 c\u1eaft ch\u00ednh x\u00e1c v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a d\u1ee5ng c\u1ee5.<\/p><h3 class=\"wp-block-heading\">L\u00e0m vi\u1ec7c n\u00f3ng<\/h3><p>Th\u00e9p kh\u00f4ng g\u1ec9 347 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c r\u00e8n v\u00e0 gia c\u00f4ng n\u00f3ng v\u1edbi k\u1ebft qu\u1ea3 t\u1ed1t, nh\u01b0ng \u0111\u00f2i h\u1ecfi ph\u1ea3i ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p><ul class=\"wp-block-list\"><li>Nhi\u1ec7t \u0111\u1ed9 r\u00e8n: Th\u01b0\u1eddng l\u00e0 gi\u1eefa <strong>1150\u00b0C \u0111\u1ebfn 1250\u00b0C (2100\u00b0F \u0111\u1ebfn 2300\u00b0F)<\/strong>.<\/li>\n\n<li>C\u00e1n n\u00f3ng c\u0169ng c\u00f3 hi\u1ec7u qu\u1ea3, nh\u01b0ng v\u1eadt li\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng l\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n <strong>980\u00b0C (1800\u00b0F)<\/strong> \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 d\u1ebbo dai.<\/li>\n\n<li>L\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed ho\u1eb7c l\u00e0m ngu\u1ed9i b\u1eb1ng n\u01b0\u1edbc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng sau khi gia c\u00f4ng n\u00f3ng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh c\u1ea5u tr\u00fac vi m\u00f4.<\/li><\/ul><h3 class=\"wp-block-heading\">L\u00e0m vi\u1ec7c l\u1ea1nh<\/h3><p>C\u00f3 th\u1ec3 gia c\u00f4ng ngu\u1ed9i \u0111\u1ed1i v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 347, nh\u01b0ng lo\u1ea1i th\u00e9p n\u00e0y c\u1ee9ng nhanh h\u01a1n m\u1ed9t s\u1ed1 lo\u1ea1i th\u00e9p austenit kh\u00e1c, \u0111\u00f2i h\u1ecfi ph\u1ea3i \u1ee7 trung gian trong qu\u00e1 tr\u00ecnh bi\u1ebfn d\u1ea1ng m\u1edf r\u1ed9ng nh\u01b0 c\u00e1n ngu\u1ed9i, u\u1ed1n ho\u1eb7c k\u00e9o.<\/p><ul class=\"wp-block-list\"><li>Qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n l\u00e0m t\u0103ng \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai c\u1ee7a v\u1eadt li\u1ec7u, v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u1ee7 \u0111\u1ec3 ph\u1ee5c h\u1ed3i \u0111\u1ed9 d\u1ebbo.<\/li><\/ul><h3 class=\"wp-block-heading\">X\u1eed l\u00fd nhi\u1ec7t<\/h3><p>\u1ee6 v\u00e0 gi\u1ea3m \u1ee9ng su\u1ea5t l\u00e0 c\u00e1c quy tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho th\u00e9p kh\u00f4ng g\u1ec9 347 \u0111\u1ec3 kh\u00f4i ph\u1ee5c \u0111\u1ed9 d\u1ebbo c\u1ee7a v\u1eadt li\u1ec7u ho\u1eb7c lo\u1ea1i b\u1ecf \u1ee9ng su\u1ea5t b\u00ean trong.<\/p><p><strong>\u1ee6:<\/strong> 1010\u00b0C \u0111\u1ebfn 1193\u00b0C (1850\u00b0F \u0111\u1ebfn 2000\u00b0F). L\u00e0m ngu\u1ed9i nhanh sau khi \u1ee7 (th\u01b0\u1eddng l\u00e0 l\u00e0m ngu\u1ed9i b\u1eb1ng n\u01b0\u1edbc) c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 k\u1ebft t\u1ee7a c\u1ee7a crom cacbua, do \u0111\u00f3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a n\u00f3.<\/p><p><strong>Gi\u1ea3m c\u0103ng th\u1eb3ng: <\/strong>Th\u01b0\u1eddng trong kho\u1ea3ng t\u1eeb 800\u00b0C \u0111\u1ebfn 870\u00b0C (1470\u00b0F \u0111\u1ebfn 1600\u00b0F). N\u00f3 c\u00f3 th\u1ec3 tr\u00e1nh hi\u1ec7u qu\u1ea3 t\u00ecnh tr\u1ea1ng n\u1ee9t do \u0103n m\u00f2n \u1ee9ng su\u1ea5t v\u00e0 gi\u1eef nguy\u00ean t\u00ednh to\u00e0n v\u1eb9n v\u1ec1 m\u1eb7t c\u1ea5u tr\u00fac c\u1ee7a v\u1eadt li\u1ec7u.<\/p><p><strong>Gi\u1ea3i ph\u00e1p x\u1eed l\u00fd:<\/strong> Th\u01b0\u1eddng trong kho\u1ea3ng t\u1eeb 1065\u00b0C \u0111\u1ebfn 1150\u00b0C (1950\u00b0F \u0111\u1ebfn 2100\u00b0F). C\u1ea7n l\u00e0m m\u00e1t nhanh sau khi x\u1eed l\u00fd b\u1eb1ng dung d\u1ecbch, th\u01b0\u1eddng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p l\u00e0m ngu\u1ed9i b\u1eb1ng n\u01b0\u1edbc, \u0111\u1ec3 ng\u0103n ng\u1eeba \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t v\u00e0 nh\u1ea1y c\u1ea3m h\u00f3a.<\/p><p><strong>L\u00e0m c\u1ee9ng tu\u1ed5i t\u00e1c: <\/strong>V\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c l\u00e0m c\u1ee9ng th\u00f4ng qua qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c l\u1ea1nh, v\u00e0 sau \u0111\u00f3 \u0111\u1ed9 b\u1ec1n c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u0103ng th\u00eam \u1edf nhi\u1ec7t \u0111\u1ed9 v\u1eeba ph\u1ea3i th\u00f4ng qua qu\u00e1 tr\u00ecnh x\u1eed l\u00fd l\u00e3o h\u00f3a. Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 l\u00e3o h\u00f3a th\u01b0\u1eddng n\u1eb1m trong ph\u1ea1m vi d\u01b0\u1edbi 800\u00b0C (ho\u1eb7c 1470\u00b0F).<\/p><h3 class=\"wp-block-heading\">X\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/h3><p>X\u1eed l\u00fd b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 v\u1ebb ngo\u00e0i c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 347. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd b\u1ec1 m\u1eb7t ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p><ul class=\"wp-block-list\"><li><strong>\u0110\u00e1nh b\u00f3ng:<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c \u1ee9ng d\u1ee5ng trang tr\u00ed v\u00e0 v\u1ec7 sinh.<\/li>\n\n<li><strong>Ng\u00e2m chua v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a: <\/strong>T\u1ea9y g\u1ec9 c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf l\u1edbp oxit b\u1ec1 m\u1eb7t v\u00e0 c\u1eb7n h\u00e0n, v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a t\u1ea1o th\u00e0nh l\u1edbp b\u1ea3o v\u1ec7 oxit d\u00e0y \u0111\u1eb7c th\u00f4ng qua x\u1eed l\u00fd h\u00f3a h\u1ecdc \u0111\u1ec3 c\u1ea3i thi\u1ec7n h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n\n<li><strong>Phun c\u00e1t: <\/strong>S\u1eed d\u1ee5ng c\u00e1t kh\u00f4ng ch\u1ee9a s\u1eaft ho\u1eb7c h\u1ea1t th\u1ee7y tinh \u0111\u1ec3 phun c\u00e1t nh\u1eb1m lo\u1ea1i b\u1ecf c\u00e1c khuy\u1ebft t\u1eadt v\u00e0 v\u1ebft n\u1ee9t nh\u1ecf tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a b\u1ec1 m\u1eb7t.<\/li>\n\n<li><strong>Ch\u1ea3i v\u00e0 m\u00e0i:<\/strong> C\u1eb7n b\u1ec1 m\u1eb7t, r\u1ec9 s\u00e9t v\u00e0 oxit c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf hi\u1ec7u qu\u1ea3 b\u1eb1ng c\u00e1ch ch\u1ea3i ho\u1eb7c m\u00e0i, do \u0111\u00f3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n b\u1ec1 m\u1eb7t.<\/li><\/ul><h2 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa 347 v\u00e0 c\u00e1c l\u1edbp kh\u00e1c<\/h2><h3 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 316 v\u00e0 347 l\u00e0 g\u00ec?<\/h3><p>347 c\u00f3 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 cao v\u01b0\u1ee3t tr\u1ed9i h\u01a1n <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-316\/\">th\u00e9p kh\u00f4ng g\u1ec9 316<\/a>, nh\u1edd kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh niobi, gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 nh\u1ea1y c\u1ea3m v\u00e0 \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t \u1edf nhi\u1ec7t \u0111\u1ed9 cao, nh\u01b0ng 316 ph\u00f9 h\u1ee3p h\u01a1n \u0111\u1ec3 ch\u1ed1ng r\u1ed7 trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng m\u00f4i tr\u01b0\u1eddng c\u00f3 ch\u1ee9a clorua.<\/p><h3 class=\"wp-block-heading\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa th\u00e9p kh\u00f4ng g\u1ec9 SS 347 v\u00e0 304 l\u00e0 g\u00ec?<\/h3><p><a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-304\/\">th\u00e9p kh\u00f4ng g\u1ec9 304<\/a> l\u00e0 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng m\u1ee5c \u0111\u00edch chung nh\u01b0 thi\u1ebft b\u1ecb nh\u00e0 b\u1ebfp v\u00e0 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, nh\u01b0ng n\u00f3 thi\u1ebfu \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ea7n thi\u1ebft cho m\u00f4i tr\u01b0\u1eddng tr\u00ean 800\u00b0F (427\u00b0C). 347 ch\u1ee9a niobi, ch\u1ed1ng \u0103n m\u00f2n gi\u1eefa c\u00e1c h\u1ea1t v\u00e0 ph\u00f9 h\u1ee3p cho d\u1ecbch v\u1ee5 nhi\u1ec7t \u0111\u1ed9 cao. Trong khi 304 l\u00e0 l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y, 347 l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng cho nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p><h3 class=\"wp-block-heading\">347 so v\u1edbi 321<\/h3><p>C\u1ea3 347 v\u00e0 321 \u0111\u1ec1u l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 austenit \u1ed5n \u0111\u1ecbnh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ed1ng l\u1ea1i s\u1ef1 nh\u1ea1y c\u1ea3m, nh\u01b0ng ch\u00fang kh\u00e1c nhau \u1edf c\u00e1c th\u00e0nh ph\u1ea7n \u1ed5n \u0111\u1ecbnh c\u1ee7a ch\u00fang \u2013 niobi cho 347 v\u00e0 titan cho <a href=\"https:\/\/steelprogroup.com\/vi\/stainless-steel\/grades\/grade-321\/\">th\u00e9p kh\u00f4ng g\u1ec9 321<\/a>. T\u00ednh \u1ed5n \u0111\u1ecbnh niobi c\u1ee7a 347 mang l\u1ea1i \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao h\u01a1n, do \u0111\u00f3 347 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe h\u01a1n, nhi\u1ec7t \u0111\u1ed9 cao.<\/p><h3 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 347 so v\u1edbi th\u00e9p h\u1ee3p kim 4140<\/h3><p>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u0103n m\u00f2n, 347 l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 austenit c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a v\u00e0 \u0103n m\u00f2n li\u00ean h\u1ea1t tuy\u1ec7t v\u1eddi. 4140 l\u00e0 th\u00e9p h\u1ee3p kim th\u1ea5p \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai cao, nh\u01b0ng kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n nh\u01b0 th\u00e9p kh\u00f4ng g\u1ec9. 347 v\u01b0\u1ee3t tr\u1ed9i trong x\u1eed l\u00fd h\u00f3a h\u1ecdc, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao, trong khi 4140 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed \u0111\u00f2i h\u1ecfi \u0111\u1ed9 b\u1ec1n cao, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u00e1nh r\u0103ng v\u00e0 tr\u1ee5c.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 347 c\u00f3 t\u1eeb t\u00ednh kh\u00f4ng?<\/h2><p>\u1ede tr\u1ea1ng th\u00e1i \u1ee7, th\u00e9p kh\u00f4ng g\u1ec9 347 th\u01b0\u1eddng kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh. Tuy nhi\u00ean, l\u00e0m vi\u1ec7c ngu\u1ed9i ho\u1eb7c bi\u1ebfn d\u1ea1ng nghi\u00eam tr\u1ecdng c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb t\u00ednh nh\u1eb9 do s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac martensitic.<\/p><h2 class=\"wp-block-heading\">Th\u00e9p kh\u00f4ng g\u1ec9 347 c\u00f3 b\u1ecb g\u1ec9 kh\u00f4ng?<\/h2><p>Do h\u00e0m l\u01b0\u1ee3ng crom cao v\u00e0 \u1ed5n \u0111\u1ecbnh b\u1eb1ng niobi, th\u00e9p kh\u00f4ng g\u1ec9 347 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng g\u1ec9 v\u00e0 \u0103n m\u00f2n cao. Nh\u01b0ng, gi\u1ed1ng nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00e1c, n\u00f3 s\u1ebd b\u1ecb r\u1ed7 c\u1ee5c b\u1ed9 ho\u1eb7c \u0103n m\u00f2n khe h\u1edf \u1edf n\u1ed3ng \u0111\u1ed9 clorua cao.<\/p><h2 class=\"wp-block-heading\">Nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 347: T\u1ea1i sao n\u00ean ch\u1ecdn SteelPRO Group?<\/h2><p>SteelPRO Group l\u00e0 nh\u00e0 cung c\u1ea5p, \u0111\u1ea1i l\u00fd v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 347 h\u00e0ng \u0111\u1ea7u t\u1ea1i Trung Qu\u1ed1c.<\/p><p>H\u00e3y ch\u1ecdn ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9 347 c\u1ee7a b\u1ea1n v\u00e0 t\u1eadn d\u1ee5ng l\u1ee3i th\u1ebf v\u1ec1 chuy\u00ean m\u00f4n, d\u00f2ng s\u1ea3n ph\u1ea9m v\u00e0 d\u1ecbch v\u1ee5 h\u00e0ng \u0111\u1ea7u trong ng\u00e0nh c\u1ee7a ch\u00fang t\u00f4i.<\/p><p><strong>Chuy\u00ean m\u00f4n to\u00e0n c\u1ea7u v\u1ec1 th\u00e9p kh\u00f4ng g\u1ec9:<\/strong> V\u1edbi nhi\u1ec1u n\u0103m kinh nghi\u1ec7m, SteelPRO Group cung c\u1ea5p v\u1eadt li\u1ec7u th\u00e9p kh\u00f4ng g\u1ec9 347 hi\u1ec7u su\u1ea5t cao cho nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p, t\u1eeb h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 \u0111\u1ebfn ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t.<\/p><p><strong>D\u00f2ng s\u1ea3n ph\u1ea9m to\u00e0n di\u1ec7n:<\/strong> Ch\u00fang t\u00f4i cung c\u1ea5p th\u00e9p kh\u00f4ng g\u1ec9 347 \u1edf nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau, bao g\u1ed3m thanh, t\u1ea5m, l\u00e1, \u1ed1ng, cu\u1ed9n v\u00e0 nhi\u1ec1u d\u1ea1ng kh\u00e1c.<\/p><p><strong>Ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng th\u1ecfa hi\u1ec7p: <\/strong>T\u1ea5t c\u1ea3 s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec1u \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn ISO v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf v\u1ec1 t\u00ednh \u0111\u1ed3ng nh\u1ea5t, \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/p><p><strong>Gi\u00e1 c\u1ea3 c\u1ea1nh tranh:<\/strong> Ch\u00fang t\u00f4i cung c\u1ea5p m\u1ee9c gi\u00e1 c\u1ea1nh tranh nh\u1ea5t tr\u00ean th\u1ecb tr\u01b0\u1eddng m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng.<\/p><p><strong>Th\u1eddi gian x\u1eed l\u00fd v\u00e0 giao h\u00e0ng nhanh ch\u00f3ng: <\/strong>Cho d\u00f9 b\u1ea1n y\u00eau c\u1ea7u \u0111\u01a1n h\u00e0ng nh\u1ecf hay l\u1edbn, ch\u00fang t\u00f4i \u0111\u1ec1u giao h\u00e0ng \u0111\u00fang h\u1eb9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n \u0111i \u0111\u00fang h\u01b0\u1edbng.<\/p><p>Li\u00ean h\u1ec7 v\u1edbi SteelPRO Group ngay h\u00f4m nay \u0111\u1ec3 <a href=\"https:\/\/steelprogroup.com\/vi\/contact-us\/\">nh\u1eadn b\u00e1o gi\u00e1<\/a> v\u00e0 tr\u1ea3i nghi\u1ec7m ch\u1ea5t l\u01b0\u1ee3ng th\u00e9p kh\u00f4ng g\u1ec9 347 cao c\u1ea5p c\u1ee7a ch\u00fang t\u00f4i.<\/p>","protected":false},"excerpt":{"rendered":"<p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o th\u00e0nh ph\u1ea7n, t\u00ednh ch\u1ea5t, \u1ee9ng d\u1ee5ng, \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m, h\u00ecnh th\u1ee9c v\u00e0 qu\u00e1 tr\u00ecnh x\u1eed l\u00fd c\u1ee7a [\u2026]<\/p>","protected":false},"author":1,"featured_media":11609,"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 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