{"id":2121,"date":"2021-03-31T08:52:53","date_gmt":"2021-03-31T08:52:53","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2121"},"modified":"2021-03-31T09:06:23","modified_gmt":"2021-03-31T09:06:23","slug":"302hq-vs-304-stainless-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/vi\/302hq-vs-304-stainless-steel\/","title":{"rendered":"Th\u00e9p kh\u00f4ng g\u1ec9 302HQ VS 304"},"content":{"rendered":"

Th\u00e9p kh\u00f4ng g\u1ec9 302HQ l\u00e0 v\u1eadt li\u1ec7u ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1eb7c bi\u1ec7t trong s\u1ea3n xu\u1ea5t v\u00edt t\u1ef1 khai th\u00e1c v\u00e0 v\u00edt c\u01a1 kh\u00ed nh\u1eb9. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong bu l\u00f4ng, \u1ed1c v\u00edt, \u0111inh t\u00e1n v\u00e0 \u1ed1c v\u00edt \u0111\u1eb7c bi\u1ec7t. T\u00ean 302HQ kh\u00f4ng \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a. ASTM li\u1ec7t k\u00ea n\u00f3 l\u00e0 UNS S30430, c\u0169ng bao g\u1ed3m \u201cXM-7\u201d, \u201c304CU\u201d v\u00e0 \u201c304HQ\u201d. B\u00e2y gi\u1edd n\u00f3 \u0111\u00e3 thay th\u1ebf ho\u00e0n to\u00e0n th\u00e9p 384 v\u00e0 305 cho m\u1ee5c \u0111\u00edch l\u00e0m ngu\u1ed9i. ISO 3506, Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n cho \u1ed1c v\u00edt b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9, 302HQ l\u00e0 th\u00e0nh ph\u1ea7n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n cho \u1ed1c v\u00edt lo\u1ea1i \u201cA2\u201d; N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt \u1edf \u0111\u1ed9 b\u1ec1n A2-70 v\u00e0 A2-80. C\u1ea5u tr\u00fac austenit \u1ed5n \u0111\u1ecbnh cho ph\u00e9p 302HQ kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh ngay c\u1ea3 sau khi gia c\u00f4ng ngu\u1ed9i tr\u00ean di\u1ec7n r\u1ed9ng v\u00e0 duy tr\u00ec \u0111\u1ed9 b\u1ec1n tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p nh\u01b0 \u0111\u00f3ng b\u0103ng. So v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 304, vi\u1ec7c b\u1ed5 sung \u0111\u1ed3ng 3% trong 302HQ c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 \u0111\u00f4ng c\u1ee9ng khi gia c\u00f4ng ngu\u1ed9i. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n

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V\u1eadt li\u1ec7u t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/p>\n\n\n\n\n
\u0110i\u1ec3m<\/td>\nUNS Kh\u00f4ng<\/td>\nDIN<\/td>\nVN<\/td>\nJIS<\/td>\n<\/tr>\n
302HQ<\/td>\nS30430<\/td>\n1.4567<\/td>\nX3CrNiCu18-9-4<\/td>\nSUSXM7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc (ASTM A493 S30430)<\/strong><\/p>\n\n\n\n\n
\u0110i\u1ec3m<\/td>\nC<\/td>\nMn<\/td>\nS\u0129<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nM\u01a1<\/td>\nNi<\/td>\nC\u1ee7<\/td>\n<\/tr>\n
302HQ<\/td>\n0.03<\/td>\n2.00<\/td>\n1.00<\/td>\n0.045<\/td>\n0.03<\/td>\n17.0-19.0<\/td>\n\/<\/td>\n8.0-10.0<\/td>\n3.0-4.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Thu\u1ed9c t\u00ednh c\u01a1 kh\u00ed<\/strong><\/p>\n

\u0110\u1ed9 b\u1ec1n k\u00e9o 302HQ: \u1ee6: 605, V\u1ebd nh\u1eb9: 660<\/p>\n

M\u1eadt \u0111\u1ed9: 7900kg\/\u33a1<\/p>\n

M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i: 193Gpa<\/p>\n

H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t trung b\u00ecnh: 0-100oC (um\/m\/oC) 17,2; 0-315oC (um\/m\/oC); 0-538oC (18,8)<\/p>\n

\u0110\u1ed9 d\u1eabn nhi\u1ec7t: 100oC (W\/M.K) 16,3; 500oC (W\/M. K) 21,5<\/p>\n

Nhi\u1ec7t dung ri\u00eang: 0-100oC (J\/ kg.K) 500;<\/p>\n

Kh\u00e1ng chi\u1ebfn: 720<\/p>\n

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Ch\u1ed1ng \u0103n m\u00f2n<\/strong><\/p>\n

Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a n\u00f3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ho\u1eb7c cao h\u01a1n th\u00e9p kh\u00f4ng g\u1ec9 304. \u0102n m\u00f2n r\u1ed7 v\u00e0 k\u1ebd h\u1edf d\u1ec5 x\u1ea3y ra trong m\u00f4i tr\u01b0\u1eddng clorua \u1ea5m, v\u00e0 v\u1ebft n\u1ee9t do \u0103n m\u00f2n \u1ee9ng su\u1ea5t r\u1ea5t nh\u1ea1y c\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n kho\u1ea3ng 50\u00b0C. 302HQ c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c kho\u1ea3ng 200mg\/L clorua trong n\u01b0\u1edbc u\u1ed1ng \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng v\u00e0 150mg\/L \u1edf 60oC.<\/p>\n

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Hi\u1ec7u su\u1ea5t ch\u1ecbu nhi\u1ec7t<\/strong><\/p>\n

Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a t\u1ed1t, nhi\u1ec7t \u0111\u1ed9 s\u1eed d\u1ee5ng kh\u00f4ng li\u00ean t\u1ee5c l\u00ean t\u1edbi 870\u00b0C, nhi\u1ec7t \u0111\u1ed9 s\u1eed d\u1ee5ng li\u00ean t\u1ee5c l\u00ean t\u1edbi 925\u00b0C. Do h\u00e0m l\u01b0\u1ee3ng carbon th\u1ea5p c\u1ee7a 302HQ n\u00ean an to\u00e0n khi s\u1eed d\u1ee5ng li\u00ean t\u1ee5c (kh\u00f4ng k\u1ebft t\u1ee7a cacbua) trong kho\u1ea3ng t\u1eeb 425 \u0111\u1ebfn 860\u00b0C.<\/p>\n

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X\u1eed l\u00fd nhi\u1ec7t<\/strong><\/p>\n

X\u1eed l\u00fd dung d\u1ecbch (\u1ee7) \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng \u0111\u1ebfn 1010-1120\u00b0C v\u00e0 l\u00e0m l\u1ea1nh nhanh ch\u00f3ng. X\u1eed l\u00fd nhi\u1ec7t s\u1ebd kh\u00f4ng l\u00e0m c\u1ee9ng n\u00f3.<\/p>\n

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T\u00ednh h\u00e0n<\/strong><\/p>\n

Kh\u1ea3 n\u0103ng h\u00e0n tuy\u1ec7t v\u1eddi, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u00e0n nhi\u1ec7t h\u1ea1ch ti\u00eau chu\u1ea9n (c\u00f3 ho\u1eb7c kh\u00f4ng ch\u1ee9a kim lo\u1ea1i ph\u1ee5). S\u1eed d\u1ee5ng \u0111i\u1ec7n c\u1ef1c 308L. H\u00e0n n\u00f3i chung l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft ngo\u1ea1i tr\u1eeb trong s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt h\u00e0n stud, trong \u0111\u00f3 h\u00e0n \u0111\u1ed1i \u0111\u1ea7u \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 n\u1ed1i c\u00e1c d\u00e2y v\u1edbi nhau.<\/p>\n

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X\u1eed l\u00fd\u00a0<\/strong><\/p>\n

302HQ hi\u1ebfm khi \u0111\u01b0\u1ee3c gia c\u00f4ng. Lo\u1ea1i n\u00e0y c\u00f3 h\u00e0m l\u01b0\u1ee3ng l\u01b0u hu\u1ef3nh r\u1ea5t th\u1ea5p, gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u1ea1o h\u00ecnh nh\u01b0ng l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng gia c\u00f4ng. 302HQ c\u1ea3i ti\u1ebfn (UGIMA 4567) c\u00f3 kh\u1ea3 n\u0103ng gia c\u00f4ng r\u1ea5t cao, h\u00e0m l\u01b0\u1ee3ng l\u01b0u hu\u1ef3nh cao h\u01a1n m\u1ed9t ch\u00fat v\u00e0 c\u0169ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd canxi \u0111\u1ec3 s\u1eed d\u1ee5ng \u0111\u00f2i h\u1ecfi c\u00e1c ho\u1ea1t \u0111\u1ed9ng gia c\u00f4ng v\u00e0 t\u1ea1o h\u00ecnh ngu\u1ed9i r\u1ed9ng r\u00e3i tr\u00ean th\u00e9p 18\/8<\/a>.<\/p>\n

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L\u00e0m c\u1ee9ng ngu\u1ed9i<\/strong><\/p>\n

302HQ l\u00e0 t\u1ed1c \u0111\u1ed9 l\u00e0m c\u1ee9ng th\u1ea5p nh\u1ea5t trong s\u1ed1 c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 austenit ph\u1ed5 bi\u1ebfn. Theo d\u1eef li\u1ec7u v\u1ebd d\u00e2y, \u0111\u1ed9 b\u1ec1n k\u00e9o t\u0103ng 8MPa khi v\u00f9ng l\u00e0m vi\u1ec7c ngu\u1ed9i gi\u1ea3m 1%). Ngay c\u1ea3 sau khi l\u00e0m vi\u1ec7c ngu\u1ed9i k\u00e9o d\u00e0i, th\u01b0\u01a1ng hi\u1ec7u v\u1ec1 c\u01a1 b\u1ea3n v\u1eabn kh\u00f4ng ph\u1ea3n \u1ee9ng v\u1edbi nam ch\u00e2m. M\u1ed9t s\u1ed1 \u1ed1c v\u00edt \u0111\u1ea7u ngu\u1ed9i c\u00f3 \u0111\u1ed9 b\u1ec1n cao y\u00eau c\u1ea7u t\u1ed1c \u0111\u1ed9 \u0111\u00f4ng c\u1ee9ng cao h\u01a1n m\u1ed9t ch\u00fat, v\u00ec v\u1eady 304<\/a> ho\u1eb7c n\u00ean s\u1eed d\u1ee5ng 304L (ho\u1eb7c lo\u1ea1i \u0111\u1eb7c bi\u1ec7t 304M) thay v\u00ec 302HQ; T\u1ed1c \u0111\u1ed9 l\u00e0m c\u1ee9ng c\u1ee7a c\u00e1c lo\u1ea1i n\u00e0y l\u00e0 kho\u1ea3ng 10-12,5MPa.<\/p>\n

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C\u00e1c \u1ee9ng d\u1ee5ng ti\u00eau bi\u1ec3u<\/strong><\/p>\n

T\u1ea5t c\u1ea3 c\u00e1c \u1ee9ng d\u1ee5ng ti\u00eau \u0111\u1ec1 l\u1ea1nh kh\u1eafc nghi\u1ec7t, bao g\u1ed3m v\u00edt t\u1ef1 khai th\u00e1c, bu l\u00f4ng m\u00e1i, v\u00edt c\u01a1 kh\u00ed, bu l\u00f4ng, v\u00edt \u0111\u1ecbnh v\u1ecb, \u0111inh t\u00e1n m\u00f9, v.v.<\/p>","protected":false},"excerpt":{"rendered":"

Th\u00e9p kh\u00f4ng g\u1ec9 302HQ l\u00e0 v\u1eadt li\u1ec7u ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1eb7c bi\u1ec7t trong s\u1ea3n xu\u1ea5t v\u00edt t\u1ef1 khai th\u00e1c v\u00e0 v\u00edt c\u01a1 kh\u00ed nh\u1eb9. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong bu l\u00f4ng, \u1ed1c v\u00edt, \u0111inh t\u00e1n v\u00e0 \u1ed1c v\u00edt \u0111\u1eb7c bi\u1ec7t. T\u00ean 302HQ kh\u00f4ng \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a. ASTM li\u1ec7t k\u00ea n\u00f3 l\u00e0 UNS S30430, c\u0169ng bao g\u1ed3m \u201cXM-7\u201d, \u201c304CU\u201d v\u00e0 \u201c304HQ\u201d. B\u00e2y gi\u1edd n\u00f3 \u0111\u00e3 ho\u00e0n to\u00e0n [\u2026]<\/p>","protected":false},"author":1,"featured_media":2123,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/comments?post=2121"}],"version-history":[{"count":3,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2121\/revisions"}],"predecessor-version":[{"id":2125,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2121\/revisions\/2125"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/media\/2123"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/media?parent=2121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/categories?post=2121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/tags?post=2121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}