{"id":5520,"date":"2020-01-23T06:36:23","date_gmt":"2020-01-23T06:36:23","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=5520"},"modified":"2025-07-01T06:36:38","modified_gmt":"2025-07-01T06:36:38","slug":"caracteristiques-classification-et-developpement-des-tubes-en-acier-inoxydable-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/caracteristiques-classification-et-developpement-des-tubes-en-acier-inoxydable-duplex\/","title":{"rendered":"Caract\u00e9ristiques, classification et d\u00e9veloppement des tuyaux en acier inoxydable duplex"},"content":{"rendered":"

Caract\u00e9ristiques, classification et d\u00e9veloppement des tuyaux en acier inoxydable duplex<\/h2>\n

D\u00e9veloppement de l'acier inoxydable duplex<\/h3>\n

Les aciers inoxydables duplex sont appel\u00e9s \u00ab duplex \u00bb car leur microstructure m\u00e9tallurgique est constitu\u00e9e de deux types de grains de ferrite et d'acier inoxydable aust\u00e9nitique. Lorsque l'acier inoxydable duplex fond, il se solidifie d'abord en une structure de ferrite compl\u00e8te lorsqu'il se solidifie \u00e0 partir de l'\u00e9tat liquide. Lorsque le mat\u00e9riau se refroidit \u00e0 temp\u00e9rature ambiante, environ la moiti\u00e9 des grains de ferrite sont transform\u00e9s en grains d'aust\u00e9nite. En cons\u00e9quence, environ 50% de la microstructure \u00e9tait une phase aust\u00e9nite et 50% \u00e9tait une phase ferrite.<\/p>\n

\"tuyau<\/a><\/p>\n

La r\u00e9sistance de l'acier inoxydable duplex est environ deux fois sup\u00e9rieure \u00e0 celle de l'acier inoxydable aust\u00e9nitique conventionnel ou de l'acier inoxydable ferritique. Les concepteurs peuvent donc r\u00e9duire l'\u00e9paisseur des parois dans certaines applications. La r\u00e9sistance \u00e0 la corrosion de l'acier inoxydable d\u00e9pend principalement de sa composition chimique. Dans la plupart des applications, les aciers inoxydables duplex pr\u00e9sentent une r\u00e9sistance \u00e9lev\u00e9e \u00e0 la corrosion en raison de leur teneur \u00e9lev\u00e9e en chrome, qui est avantageuse dans les acides oxydants, et contiennent des quantit\u00e9s suffisantes de molybd\u00e8ne<\/a> et le nickel pour r\u00e9sister aux acides mod\u00e9r\u00e9ment r\u00e9ducteurs. Corrosion du milieu.<\/p>\n

Les aciers inoxydables duplex r\u00e9sistent aux piq\u00fbres de chlorure et \u00e0 la corrosion caverneuse, en fonction de leur teneur en chrome, molybd\u00e8ne, tungst\u00e8ne et azote. La teneur relativement \u00e9lev\u00e9e en chrome, molybd\u00e8ne et azote des aciers inoxydables duplex les rend tr\u00e8s r\u00e9sistants aux piq\u00fbres et \u00e0 la corrosion caverneuse des chlorures. Ils ont une s\u00e9rie de propri\u00e9t\u00e9s de r\u00e9sistance \u00e0 la corrosion diff\u00e9rentes, toutes deux \u00e9quivalentes \u00e0 la r\u00e9sistance \u00e0 la corrosion de l'acier inoxydable 316, tel que l'acier inoxydable duplex \u00e9conomique 2101 \u00a9, et l'\u00e9quivalent de l'acier inoxydable au molybd\u00e8ne 6%, tel que SAF 2507<\/a> \u00a9.<\/p>\n

Caract\u00e9ristiques de l'inox duplex<\/h3>\n

L'acier inoxydable Duplex pr\u00e9sente une tr\u00e8s bonne r\u00e9sistance aux fissuration par corrosion sous contrainte<\/a> (SCC). Cette propri\u00e9t\u00e9 est \"h\u00e9rit\u00e9e\" du c\u00f4t\u00e9 ferrite. La r\u00e9sistance de tous les aciers inoxydables duplex \u00e0 la fissuration par corrosion sous contrainte due au chlorure est nettement meilleure que celle des aciers inoxydables aust\u00e9nitiques de la s\u00e9rie 300. Les aciers inoxydables aust\u00e9nitiques standard tels que 304 et 316 peuvent subir une corrosion fissurante sous contrainte en pr\u00e9sence d'ions chlorure, d'air humide et de temp\u00e9ratures \u00e9lev\u00e9es. Par cons\u00e9quent, dans de nombreuses applications de l'industrie chimique o\u00f9 le risque de corrosion sous contrainte est plus \u00e9lev\u00e9, tuyaux en acier inoxydable duplex<\/a> sont souvent utilis\u00e9s \u00e0 la place des tuyaux en acier inoxydable aust\u00e9nitique.<\/p>","protected":false},"featured_media":5521,"template":"","categories":[186],"tags":[],"class_list":["post-5520","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nCharacteristics, Classification And Development Of Duplex Stainless Steel Pipes - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kaysuns.com\/fr\/blog\/caracteristiques-classification-et-developpement-des-tubes-en-acier-inoxydable-duplex\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Characteristics, Classification And Development Of Duplex Stainless Steel Pipes - Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n<meta property=\"og:description\" content=\"Characteristics, Classification And Development Of Duplex Stainless Steel Pipes Development\u00a0of duplex stainless steel Duplex stainless steels are called \u201cduplex\u201d because their metallurgical microstructure consists of two types of ferrite and austenitic stainless steel grains. 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