{"id":6184,"date":"2020-06-25T07:13:00","date_gmt":"2020-06-25T07:13:00","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6184"},"modified":"2026-03-31T06:07:17","modified_gmt":"2026-03-31T06:07:17","slug":"quest-ce-que-lalliage-hastelloy-b2","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-lalliage-hastelloy-b2\/","title":{"rendered":"Qu'est-ce que l'alliage Hastelloy B2\u00a0?"},"content":{"rendered":"

Pr\u00e9sentation de l'alliage Hastelloy B2<\/strong><\/h2>\n\n\n\n

L'alliage Hastelloy B2, qui appartient \u00e0 la famille des alliages Hastelloy, a \u00e9t\u00e9 d\u00e9velopp\u00e9 principalement pour pr\u00e9venir la corrosion intergranulaire et la corrosion en lame de couteau de l'alliage Hastelloy B.<\/p>\n\n\n

\n
\"barre
barre ronde en alliage hastelly B2<\/figcaption><\/figure>\n<\/div>\n\n\n

La principale diff\u00e9rence entre cet alliage et Hastelloy B<\/a> est caract\u00e9ris\u00e9 par une faible teneur en carbone et en silicium dans sa composition chimique, et la teneur en fer est pass\u00e9e de moins de 6% \u00e0 2%.<\/p>\n\n\n\n

En raison des changements de teneur en carbone, silicium et fer, bien que la structure matricielle de l'alliage Hastelloy B2 ne soit pas diff\u00e9rente de celle de l'alliage Hastelloy B, la phase de pr\u00e9cipitation sur la matrice de l'alliage ou le long du joint de grain est tr\u00e8s diff\u00e9rente.<\/p>\n\n\n\n

R\u00e9sistance \u00e0 la corrosion<\/strong>s<\/h3>\n\n\n\n

Corrosion totale<\/strong>, les caract\u00e9ristiques de performance de l'alliage B2 contre l'acide chlorhydrique, l'acide sulfurique, l'acide phosphorique et d'autres acides inorganiques sont fondamentalement les m\u00eames que l'alliage Hastelloy B. La r\u00e9sistance \u00e0 la corrosion est g\u00e9n\u00e9ralement meilleure que celle de l'alliage Hastelloy B, surtout apr\u00e8s soudage. Dans l'acide chlorhydrique bouillant 20%, m\u00eame si l'alliage B2 est d\u00e9form\u00e9 par le 50% en \u00e9crouissage \u00e0 froid, cela n'affecte pas sa r\u00e9sistance \u00e0 la corrosion.<\/p>\n\n\n\n

Corrosion intergranulaire<\/strong>, en raison de la faible teneur en carbone, silicium et fer dans l'alliage Hastelloy B2, les carbures et certaines phases interm\u00e9talliques dans l'acier sensibilis\u00e9 sont bien inf\u00e9rieurs \u00e0 l'alliage Hastelloy B, par cons\u00e9quent, la r\u00e9sistance de cet alliage \u00e0 la corrosion intergranulaire est meilleure.<\/p>\n\n\n\n

Corrosion sous contrainte<\/strong>, le test montre que lorsque les r\u00e9sidus Fe\u22642% et Cr\u22641.0% dans l'alliage Hastelloy B2 sont trop faibles par rapport au m\u00eame alliage avec un bon contr\u00f4le de la quantit\u00e9 de fer et de chrome. Mieux que l'ancien.<\/p>\n\n\n\n

Propri\u00e9t\u00e9s m\u00e9caniques de l'alliage Hastelloy B2<\/strong><\/h3>\n\n\n\n

La plasticit\u00e9 de l'alliage Hastelloy B2 \u00e0 l'\u00e9tat de vieillissement \u00e0 moyenne temp\u00e9rature diminue et se d\u00e9t\u00e9riore avec le temps. Ceci est li\u00e9 \u00e0 la pr\u00e9cipitation de la phase qui est dure et cassante dans l'\u00e9tat de vieillissement \u00e0 temp\u00e9rature moyenne.<\/p>\n\n\n\n

Performances de soudage<\/strong><\/h3>\n\n\n\n

L'alliage Hastelloy B2 a de bonnes performances de soudage, et en raison de la faible teneur en carbone, silicium et fer dans cet alliage, la r\u00e9sistance \u00e0 la corrosion intergranulaire et \u00e0 la corrosion du tranchant apr\u00e8s soudage est meilleure que l'Hastelloy B.<\/p>\n\n\n\n

Lorsque la quantit\u00e9 de fer et de chrome dans l'alliage est correctement contr\u00f4l\u00e9e, la plasticit\u00e9, la t\u00e9nacit\u00e9, la r\u00e9sistance \u00e0 la corrosion et la soudabilit\u00e9 de l'alliage Hastelloy B2 seront encore am\u00e9lior\u00e9es.<\/p>\n\n\n\n

L'alliage Hastelloy B2 ne n\u00e9cessite g\u00e9n\u00e9ralement pas de traitement thermique apr\u00e8s soudage. Cet alliage est plus adapt\u00e9 au soudage d'\u00e9quipements et de composants que l'alliage Hastelloy B.<\/p>\n\n\n\n

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

Ses propri\u00e9t\u00e9s de traitement et de formage \u00e0 froid et \u00e0 chaud sont fondamentalement similaires \u00e0 celles de l'alliage Hastelloy B. Cependant, lorsque la quantit\u00e9 de fer et de chrome dans l'alliage B2 est correctement contr\u00f4l\u00e9e, sa maniabilit\u00e9, en particulier sa thermoformabilit\u00e9, sera consid\u00e9rablement am\u00e9lior\u00e9e.<\/p>\n\n\n\n

\u00c0 l'exception des instructions sp\u00e9ciales, ils doivent \u00eatre trait\u00e9s apr\u00e8s un traitement en solution \u00e0 1066\u2103. \u00c0 l'exception de ceux qui contr\u00f4lent la quantit\u00e9 de Fe + Cr dans l'alliage, il est g\u00e9n\u00e9ralement interdit de rester et de l'utiliser pendant une longue p\u00e9riode entre 538 et 816\u00a0<\/p>\n\n\n\n

Applications<\/strong><\/h3>\n\n\n\n

L'alliage B2 peut produire tuyaux en hastelloy b2<\/a>, t\u00f4les, barres, fils, bandes et pi\u00e8ces forg\u00e9es.<\/p>\n\n\n\n

Principalement utilis\u00e9 dans tuyaux et raccords<\/a>, conteneurs et leurs rev\u00eatements, tours de r\u00e9action et rev\u00eatements, pompes et vannes r\u00e9sistant \u00e0 l'acide chlorhydrique, l'acide sulfurique, l'acide phosphorique et l'acide formique.<\/p>","protected":false},"featured_media":6185,"template":"","categories":[186],"tags":[],"class_list":["post-6184","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nWhat is Hastelloy B2 Alloy? - Duplex Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"What is Hastelloy B2 alloy, it was developed mainly to prevent intergranular corrosion and knife edge corrosion of Hastelloy B alloy.\" \/>\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\/quest-ce-que-lalliage-hastelloy-b2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Hastelloy B2 Alloy? 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