{"id":6020,"date":"2020-06-03T05:58:26","date_gmt":"2020-06-03T05:58:26","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6020"},"modified":"2025-07-01T06:34:15","modified_gmt":"2025-07-01T06:34:15","slug":"quest-ce-que-lacier-inoxydable-2507-super-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-lacier-inoxydable-2507-super-duplex\/","title":{"rendered":"Qu'est-ce que l'acier inoxydable 2507 Super Duplex"},"content":{"rendered":"

2507 acier inoxydable super duplex : 00Cr25Ni7Mo4N<\/h2>\n\n\n
\n
\"2507
2507 Barre en acier inoxydable super duplex<\/figcaption><\/figure>\n<\/div>\n\n\n

L'acier inoxydable 2507 est appel\u00e9 00Cr25Ni7Mo4N en Chine. Il s'agit d'un acier inoxydable super duplex bien connu. La quantit\u00e9 de chrome, molybd\u00e8ne<\/a> et d'azote dans l'acier est sup\u00e9rieure \u00e0 celle de l'acier inoxydable duplex de deuxi\u00e8me g\u00e9n\u00e9ration. Sa valeur PRE peut atteindre 42 et il pr\u00e9sente une excellente r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et \u00e0 la corrosion par crevasses.<\/p>\n\n\n\n

L'acier duplex 2057 a \u00e9t\u00e9 d\u00e9velopp\u00e9 pour la premi\u00e8re fois par la soci\u00e9t\u00e9 su\u00e9doise SANDVIK et est sorti en 1993.<\/p>\n\n\n\n

Caract\u00e9ristiques de l'acier super duplex 2507<\/strong><\/h3>\n\n\n\n

Une fois que l'acier inoxydable 2507 convient au traitement en solution, la microstructure de cet acier pr\u00e9sente une structure biphas\u00e9e id\u00e9ale avec un rapport \u03b1\/\u03b3 d'environ 50\/50.<\/p>\n\n\n\n

Lorsque la temp\u00e9rature de la solution est sup\u00e9rieure \u00e0 1050 \u00b0C, \u00e0 mesure que la temp\u00e9rature augmente, le nombre de phases de ferrite dans l'acier augmentera, mais en raison de la teneur \u00e9lev\u00e9e en azote, la proportion d'acier en dessous de 1300 \u00b0C ne changera pas de mani\u00e8re significative.<\/p>\n\n\n\n

Propri\u00e9t\u00e9s m\u00e9caniques de l'acier super duplex 2507<\/strong><\/h3>\n\n\n\n

Des \u00e9tudes ont montr\u00e9 que pour obtenir une temp\u00e9rature de transition fragile inf\u00e9rieure \u00e0 -50 et une t\u00e9nacit\u00e9 suffisante pour les aciers inoxydables super duplex tels que l'acier inoxydable 2507, la teneur en Cr\/Ni dans l'acier doit \u00eatre contr\u00f4l\u00e9e pour obtenir le meilleur deux- comparaison de phases. <\/p>\n\n\n\n

Il est n\u00e9cessaire d'am\u00e9liorer la puret\u00e9 de l'acier et de ma\u00eetriser les proc\u00e9d\u00e9s appropri\u00e9s de travail \u00e0 chaud et de traitement thermique.<\/p>\n\n\n\n

R\u00e9sistances \u00e0 la corrosion<\/strong><\/h3>\n\n\n\n
    \n
  1. Corrosion globale<\/strong>: La r\u00e9sistance globale \u00e0 la corrosion de l'acier inoxydable 2507 est non seulement meilleure que celle des aciers inoxydables aust\u00e9nitiques au chrome-nickel tels que le 316 et le 904L dans certains milieux, mais \u00e9galement similaire \u00e0 l'acier inoxydable super aust\u00e9nitique 6Mo+N.<\/li>\n\n\n\n
  2. Corrosion par piq\u00fbres et crevasses<\/strong>: L'acier inoxydable 2507 a une excellente r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et crevasses. Dans certains tests, la r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et crevasses de l'acier 2507 est proche voire sup\u00e9rieure \u00e0 celle du 6Mo+N super aust\u00e9nitique.<\/li>\n\n\n\n
  3. Corrosion sous contrainte<\/strong>: L'inox 2507 a une excellente r\u00e9sistance \u00e0 la corrosion sous contrainte. Par exemple, lors de l'utilisation de gaz acide Cl-H\u2082S, la r\u00e9sistance \u00e0 la corrosion sous contrainte de l'acier inoxydable 2507 est non seulement meilleure que celle de l'acier inoxydable duplex 2304, 2205 de deuxi\u00e8me g\u00e9n\u00e9ration, 304L, 316L en acier inoxydable aust\u00e9nitique ordinaire, mais \u00e9galement sup\u00e9rieure au chrome \u00e9lev\u00e9. , nickel et molybd\u00e8ne Acier inoxydable 904L et alliage fer-nickel r\u00e9sistant \u00e0 la corrosion Sanicro28.<\/li>\n\n\n\n
  4. Abrasion<\/strong>: Parce que l'acier inoxydable 2507 super duplex a \u00e0 la fois une r\u00e9sistance \u00e0 la corrosion \u00e9lev\u00e9e et une duret\u00e9 \u00e9lev\u00e9e, par cons\u00e9quent, cet acier pr\u00e9sente d'excellentes performances dans un environnement de fluide abrasif avec \u00e0 la fois des milieux corrosifs et des particules fixes R\u00e9sistance \u00e0 l'usure<\/li>\n<\/ol>\n\n\n\n

    Performances de traitement \u00e0 froid et \u00e0 chaud<\/strong><\/h3>\n\n\n\n

    Processus thermique<\/strong>: Le tuyau en acier inoxydable Super duplex a une plasticit\u00e9 d'ouvrabilit\u00e9 \u00e0 chaud inf\u00e9rieure \u00e0 l'ordinaire tuyau en acier inoxydable duplex<\/a> avec une teneur plus faible en chrome, molybd\u00e8ne et azote, et la r\u00e9sistance \u00e0 la d\u00e9formation \u00e0 chaud est relativement \u00e9lev\u00e9e. Par cons\u00e9quent, l'ouvrabilit\u00e9 \u00e0 chaud de cet acier est relativement mauvaise. Les exp\u00e9riences montrent que la temp\u00e9rature de traitement \u00e0 chaud de l'acier inoxydable 2507 est de pr\u00e9f\u00e9rence de 1020 ~ 1125\u2103.<\/p>\n\n\n\n

    Processus \u00e0 froid<\/strong>: L'acier inoxydable 2507 a une bonne aptitude au fa\u00e7onnage \u00e0 froid et peut \u00eatre travaill\u00e9 \u00e0 froid et form\u00e9 \u00e0 froid \u00e0 l'\u00e9tat de traitement en solution. Cependant, comme la limite d'\u00e9lasticit\u00e9 de l'acier inoxydable super duplex est beaucoup plus \u00e9lev\u00e9e que celle de l'acier inoxydable monophas\u00e9, il n\u00e9cessite une force externe importante lors de la d\u00e9formation initiale. Durcissement \u00e0 froid, lorsque la d\u00e9formation \u00e0 froid d\u00e9passe 20%, il doit subir un traitement thermique interm\u00e9diaire \u00e0 1080 ~ 1120\u2103.<\/p>\n\n\n\n

    Champ d'application de l'acier super duplex 2507<\/strong><\/h3>\n\n\n\n

    2507 Super Duplex Steel est principalement utilis\u00e9 dans les ol\u00e9oducs et gazoducs, les r\u00e9servoirs et les r\u00e9servoirs des transporteurs chimiques offshore, l'industrie chimique, l'industrie p\u00e9trochimique, l'industrie du raffinage du p\u00e9trole et les tours, r\u00e9servoirs, navires, \u00e9changeurs de chaleur dans les environnements d'eau de mer.<\/p>","protected":false},"featured_media":6021,"template":"","categories":[186],"tags":[],"class_list":["post-6020","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nWhat Is 2507 Super Duplex Stainless Steel - Duplex Pipe KAYSUNS<\/title>\n<meta name=\"description\" content=\"what is 2507 super stainless steel? it is called 00Cr25Ni7Mo4N in China. 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