{"id":5304,"date":"2019-09-20T02:10:03","date_gmt":"2019-09-20T02:10:03","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=5304"},"modified":"2025-07-01T06:38:02","modified_gmt":"2025-07-01T06:38:02","slug":"avantages-et-inconvenients-de-lajout-de-titane-dans-lacier-inoxydable-austenitique","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/avantages-et-inconvenients-de-lajout-de-titane-dans-lacier-inoxydable-austenitique\/","title":{"rendered":"Avantages et inconv\u00e9nients de l'ajout de titane dans l'acier inoxydable aust\u00e9nitique"},"content":{"rendered":"

Avantages et inconv\u00e9nients de l'ajout de titane dans l'acier inoxydable aust\u00e9nitique<\/h2>\n

Lorsque l'acier inoxydable aust\u00e9nitique au chrome-nickel est chauff\u00e9 \u00e0 une temp\u00e9rature comprise entre 450 et 800 \u00b0C, corrosion intergranulaire<\/a> L'ajout de titane am\u00e9liorera cette situation, mais est-ce une bonne ou une mauvaise chose ?<\/em><\/p>\n

La corrosion intergranulaire est en effet provoqu\u00e9e par la pr\u00e9cipitation du carbone de la structure m\u00e9tallurgique aust\u00e9nitique satur\u00e9e sous forme de Cr23C6, ce qui entra\u00eene un appauvrissement en chrome de la structure aust\u00e9nite au joint de grains. Par cons\u00e9quent, \u00e9viter une carence en chrome au joint de grain est un moyen efficace de pr\u00e9venir la corrosion intergranulaire.<\/p>\n

Les \u00e9l\u00e9ments de l'acier inoxydable sont class\u00e9s selon le degr\u00e9 d'affinit\u00e9 avec le carbone, dans l'ordre du titane, du tantale, molybd\u00e8ne<\/a>le chrome et le mangan\u00e8se. On peut constater que l'affinit\u00e9 du titane et du carbone est plus grande que celle du chrome. Lorsque du titane est ajout\u00e9 \u00e0 l'acier, le carbone se combine de pr\u00e9f\u00e9rence au titane pour former du carbure de titane, ce qui peut emp\u00eacher efficacement la formation de carbure de chrome et la pr\u00e9cipitation pour former un joint de grain pauvre en chrome. Peut pr\u00e9venir efficacement la corrosion intergranulaire.<\/p>\n

\u00c9tant donn\u00e9 que le titane et l'azote peuvent se combiner pour former du nitrure de titane, le titane et l'oxyg\u00e8ne peuvent \u00eatre combin\u00e9s pour former du dioxyde de titane, de sorte que la quantit\u00e9 de titane ajout\u00e9e est limit\u00e9e. Afin d'\u00e9viter la corrosion intergranulaire dans la production r\u00e9elle d'acier inoxydable, la quantit\u00e9 de titane ajout\u00e9e est principalement d'environ 0,8%.<\/p>\n

Afin d'\u00e9viter la corrosion intergranulaire, l'acier inoxydable contenant du titane doit \u00eatre stabilis\u00e9 apr\u00e8s la mise en solution. Apr\u00e8s la mise en solution, l'acier inoxydable aust\u00e9nitique obtient une structure d'aust\u00e9nite monophasique, mais l'\u00e9tat de cette structure n'est pas stable. Lorsque la temp\u00e9rature est port\u00e9e \u00e0 plus de 450\u00b0C, le carbone dans la solution solide pr\u00e9cipite progressivement sous forme de carbure, dont Cr23C6 La temp\u00e9rature de formation est de 650\u00b0C, et 900\u00b0C est la temp\u00e9rature de formation du TiC. Pour \u00e9viter la corrosion intergranulaire, il est n\u00e9cessaire de r\u00e9duire la teneur en Cr23C6 et de laisser le carbure exister compl\u00e8tement sous forme de TiC.<\/p>\n

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

La stabilit\u00e9 du carbure de titane \u00e9tant sup\u00e9rieure \u00e0 celle du chrome, lorsque l'acier inoxydable est chauff\u00e9 au-dessus de 700\u00b0C, le carbure de chrome commence \u00e0 se transformer en carbure de titane. La stabilisation consiste \u00e0 chauffer l'inox \u00e0 850-930\u00b0C pendant 1 heure. \u00c0 ce stade, le carbure de chrome se d\u00e9composera compl\u00e8tement pour former du carbure de titane gris ou noir stable, et la r\u00e9sistance de l'acier inoxydable \u00e0 la corrosion intergranulaire est optimis\u00e9e. De plus, du titane est ajout\u00e9 \u00e0 l'acier inoxydable pour pr\u00e9cipiter les compos\u00e9s interm\u00e9talliques Fe2Ti dans certaines conditions afin d'am\u00e9liorer la r\u00e9sistance \u00e0 haute temp\u00e9rature de l'acier inoxydable.<\/p>\n

D\u00e9savantages:<\/strong>
\nLe titane n'est pas non plus totalement inoffensif dans l'acier inoxydable, et parfois le titane peut \u00e9galement compromettre les performances de l'acier inoxydable. Par exemple, il y a facilement des inclusions telles que TiO2 et TiN, et leur teneur est \u00e9lev\u00e9e et in\u00e9galement r\u00e9partie, ce qui r\u00e9duit dans une certaine mesure la puret\u00e9 de l'acier inoxydable ; cela aggrave \u00e9galement la qualit\u00e9 de surface des lingots d'acier inoxydable, ce qui entra\u00eene une augmentation de la quantit\u00e9 de broyage de processus, ce qui est facile. Il provoque des d\u00e9chets\u00a0; les performances de polissage du produit fini ne sont pas tr\u00e8s bonnes et le traitement de surfaces de haute pr\u00e9cision est tr\u00e8s difficile.<\/p>\n

L'article \u00e9dit\u00e9 par tuyau duplex 2205<\/a> kaysuns<\/p>","protected":false},"featured_media":5305,"template":"","categories":[186],"tags":[],"class_list":["post-5304","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nAdvantages And Disadvantages Of Adding Titanium In Austenitic Stainless Steel - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"When chromium-nickel austenitic stainless steel is heated to a temperature range of 450-800 \u00b0 C, intergranular corrosion often occurs, but the addition of titanium will improve this situation, but is this good or bad?\" \/>\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\/avantages-et-inconvenients-de-lajout-de-titane-dans-lacier-inoxydable-austenitique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Advantages And Disadvantages Of Adding Titanium In Austenitic Stainless Steel - 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