{"id":2237,"date":"2021-08-06T06:41:21","date_gmt":"2021-08-06T06:41:21","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2237"},"modified":"2021-08-06T06:41:21","modified_gmt":"2021-08-06T06:41:21","slug":"is-318ln-a-type-duplex-stainless-steel-grades","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/vi\/is-318ln-a-type-duplex-stainless-steel-grades\/","title":{"rendered":"318LN c\u00f3 ph\u1ea3i l\u00e0 lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 song c\u00f4ng kh\u00f4ng?"},"content":{"rendered":"<p>318LN l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng nit\u01a1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c l\u1ed7i \u0103n m\u00f2n \u1edf th\u00e9p kh\u00f4ng g\u1ec9 d\u00f2ng 300. C\u1ea5u tr\u00fac c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 318LN bao g\u1ed3m Austenite \u0111\u01b0\u1ee3c bao quanh b\u1edfi c\u00e1c pha Ferrite li\u00ean t\u1ee5c. 318LN ch\u1ee9a kho\u1ea3ng 40-50% Ferrite \u1edf tr\u1ea1ng th\u00e1i \u1ee7 v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 song c\u00f4ng. C\u1ea5u tr\u00fac song c\u00f4ng k\u1ebft h\u1ee3p h\u1ee3p kim ferrite (kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u1ee9ng su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n cao) v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a h\u1ee3p kim Austenitic (d\u1ec5 s\u1ea3n xu\u1ea5t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n). 318LN c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u0111\u1ed3ng \u0111\u1ec1u H2S, n\u1ee9t do \u1ee9ng su\u1ea5t sunfua, kh\u1ea3 n\u0103ng th\u1ea5m v\u00e0 r\u1ed7 hydro, \u0111\u1ed3ng th\u1eddi gi\u1ea3m \u0103n m\u00f2n m\u00f4i tr\u01b0\u1eddng. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ea7u gi\u1ebfng, van, th\u00e2n v\u00e0 \u1ed1c v\u00edt ch\u1ecbu l\u01b0u hu\u1ef3nh \u0111\u1ec3 s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng khai th\u00e1c n\u01a1i \u00e1p su\u1ea5t ri\u00eang ph\u1ea7n H2S v\u01b0\u1ee3t qu\u00e1 1MPa. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng th\u00e9p kh\u00f4ng g\u1ec9 song 318LN n\u00ean \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n \u1edf nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 600\u00b0F v\u00ec nhi\u1ec7t \u0111\u1ed9 cao k\u00e9o d\u00e0i c\u00f3 th\u1ec3 l\u00e0m th\u00e9p kh\u00f4ng g\u1ec9 318LN b\u1ecb gi\u00f2n.<\/p>\n<p>&nbsp;<\/p>\n<h3>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p 318LN<\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"94\">Cr<\/td>\n<td width=\"94\">Ni<\/td>\n<td width=\"94\">M\u01a1<\/td>\n<td width=\"94\">C<\/td>\n<td width=\"94\">N<\/td>\n<td width=\"94\">Mn<\/td>\n<td width=\"94\">S\u0129<\/td>\n<td width=\"94\">P<\/td>\n<td width=\"94\">S<\/td>\n<\/tr>\n<tr>\n<td width=\"94\">22.0-23.0<\/td>\n<td width=\"94\">4.50-6.50<\/td>\n<td width=\"94\">3.00-3.50<\/td>\n<td width=\"94\">.030,030<\/td>\n<td width=\"94\">0.14-0.20<\/td>\n<td width=\"94\">2,00<\/td>\n<td width=\"94\">1,00<\/td>\n<td width=\"94\">.030,030<\/td>\n<td width=\"94\">.0.020<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td colspan=\"4\" width=\"852\">Thu\u1ed9c t\u00ednh c\u01a1 kh\u00ed<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">C\u00f3 (Mpa)<\/td>\n<td width=\"213\">Ts (Mpa)<\/td>\n<td width=\"213\">\u0110\u1ed9 gi\u00e3n d\u00e0i (%)<\/td>\n<td width=\"213\">hv<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Ti\u00eau chu\u1ea9n<\/td>\n<td width=\"213\">\u2265 450<\/td>\n<td width=\"213\">\u2265 620<\/td>\n<td width=\"213\">\u2265 18<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\" width=\"852\">T\u00e0i s\u1ea3n v\u1eadt ch\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">M\u1eadt \u0111\u1ed9 (g\/cm3)<\/td>\n<td width=\"213\">Nhi\u1ec7t dung ri\u00eang (J\/gC)<\/td>\n<td width=\"213\">D\u1eabn nhi\u1ec7t<\/p>\n<p>100C(W\/m.)<\/td>\n<td width=\"213\">H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t<\/p>\n<p>20~100C (10\/C)<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">7.8<\/td>\n<td width=\"213\">0.45<\/td>\n<td width=\"213\">19.0<\/td>\n<td width=\"213\">13.7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h3>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a th\u00e9p 318LN<\/h3>\n<ul>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u1ee9ng su\u1ea5t sunfua tuy\u1ec7t v\u1eddi<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n \u1ee9ng su\u1ea5t clorua t\u1ed1t, \u0103n m\u00f2n r\u1ed7 v\u00e0 k\u1ebd h\u1edf<\/li>\n<li>C\u01b0\u1eddng \u0111\u1ed9 cao,<\/li>\n<li>Kh\u1ea3 n\u0103ng h\u00e0n v\u00e0 kh\u1ea3 n\u0103ng l\u00e0m vi\u1ec7c t\u1ed1t<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a th\u00e9p 318LN<\/h3>\n<ul>\n<li>Th\u00f9ng ch\u1ee9a x\u1eed l\u00fd h\u00f3a ch\u1ea5t, \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/li>\n<li>M\u00e1y nghi\u1ec1n b\u1ed9t gi\u1ea5y, ch\u1ea5t t\u1ea9y tr\u1eafng, th\u00f9ng ch\u1ee9a chip tr\u01b0\u1edbc h\u01a1i n\u01b0\u1edbc<\/li>\n<li>Thi\u1ebft b\u1ecb ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/li>\n<li>\u0110\u01b0\u1eddng \u1ed1ng h\u00f3a d\u1ea7u v\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/li>\n<li>Thi\u1ebft b\u1ecb kh\u1eed l\u01b0u hu\u1ef3nh kh\u00ed th\u1ea3i<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Th\u00e9p kh\u00f4ng g\u1ec9 song c\u00f4ng 318LN l\u00e0 gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m v\u00e0 hi\u1ec7u qu\u1ea3 cho c\u00e1c \u1ee9ng d\u1ee5ng trong \u0111\u00f3 th\u00e9p kh\u00f4ng g\u1ec9 d\u00f2ng 300 d\u1ec5 b\u1ecb n\u1ee9t do \u0103n m\u00f2n \u1ee9ng su\u1ea5t clorua. Khi th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ecbu \u1ee9ng su\u1ea5t k\u00e9o, v\u1ebft n\u1ee9t \u0103n m\u00f2n \u1ee9ng su\u1ea5t s\u1ebd x\u1ea3y ra khi ti\u1ebfp x\u00fac v\u1edbi dung d\u1ecbch ch\u1ee9a clorua v\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u0103ng c\u0169ng s\u1ebd l\u00e0m t\u0103ng \u0111\u1ed9 nh\u1ea1y c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ed1i v\u1edbi v\u1ebft n\u1ee9t \u0103n m\u00f2n \u1ee9ng su\u1ea5t. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa crom, molypden v\u00e0 nit\u01a1 gi\u00fap t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ed7 clorua v\u00e0 k\u1ebd h\u1edf c\u1ee7a 318LN, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 nh\u01b0 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, n\u01b0\u1edbc l\u1ee3, ho\u1ea1t \u0111\u1ed9ng t\u1ea9y tr\u1eafng, h\u1ec7 th\u1ed1ng n\u01b0\u1edbc kh\u00e9p k\u00edn v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m. Trong h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng, h\u00e0m l\u01b0\u1ee3ng cr\u00f4m, molypden v\u00e0 nit\u01a1 cao c\u1ee7a 318LN mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 th\u00f4ng th\u01b0\u1eddng nh\u01b0 <a href=\"https:\/\/wldstainless.com\/materials\/austenitic-stainless-steel\/316-316l-stainless-steel\/\">316L<\/a> v\u00e0 317L.<\/p>","protected":false},"excerpt":{"rendered":"<p>318LN l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng nit\u01a1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c l\u1ed7i \u0103n m\u00f2n \u1edf th\u00e9p kh\u00f4ng g\u1ec9 d\u00f2ng 300. C\u1ea5u tr\u00fac c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9 318LN bao g\u1ed3m Austenite \u0111\u01b0\u1ee3c bao quanh b\u1edfi c\u00e1c pha Ferrite li\u00ean t\u1ee5c. 318LN ch\u1ee9a kho\u1ea3ng 40-50% Ferrite \u1edf tr\u1ea1ng th\u00e1i \u1ee7 v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9 song c\u00f4ng. C\u1ea5u tr\u00fac song c\u00f4ng k\u1ebft h\u1ee3p c\u00e1c h\u1ee3p kim ferit (\u0103n m\u00f2n \u1ee9ng su\u1ea5t [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2237","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2237","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=2237"}],"version-history":[{"count":1,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2237\/revisions"}],"predecessor-version":[{"id":2238,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/posts\/2237\/revisions\/2238"}],"wp:attachment":[{"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/media?parent=2237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/categories?post=2237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wldstainless.com\/vi\/wp-json\/wp\/v2\/tags?post=2237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}