{"id":6667,"date":"2021-01-22T06:36:22","date_gmt":"2021-01-22T06:36:22","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6667"},"modified":"2022-06-30T08:55:29","modified_gmt":"2022-06-30T08:55:29","slug":"2205-traitement-recto-verso","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/2205-traitement-recto-verso\/","title":{"rendered":"2205 Traitement recto-verso"},"content":{"rendered":"

Wleding Traitement de l'acier inoxydable 2205 Duplex<\/strong><\/h2>\n\n\n\n

Le traitement duplex 2205 est similaire \u00e0 l'acier inoxydable 316L \u00e0 bien des \u00e9gards, mais il existe encore des diff\u00e9rences importantes.<\/p>\n\n\n\n

Le traitement de l'acier inoxydable 2205 duplex est similaire \u00e0 celui du 316L \u00e0 bien des \u00e9gards, mais il existe encore des diff\u00e9rences importantes.<\/p>\n\n\n\n

Les op\u00e9rations de formage \u00e0 froid doivent prendre en compte les caract\u00e9ristiques de r\u00e9sistance et d'\u00e9crouissage sup\u00e9rieures de l'acier inoxydable duplex. L'\u00e9quipement de formage peut n\u00e9cessiter une capacit\u00e9 de charge plus \u00e9lev\u00e9e, et pendant les op\u00e9rations de formage, l'acier inoxydable 2205 pr\u00e9sentera un retour \u00e9lastique plus \u00e9lev\u00e9 que les nuances d'acier inoxydable aust\u00e9nitique standard.<\/p>\n\n\n\n

La r\u00e9sistance plus \u00e9lev\u00e9e de l'acier inoxydable duplex 2205 le rend plus difficile \u00e0 usiner que le 316L.<\/p>\n\n\n\n

Le soudage de l'acier inoxydable 2205 duplex peut utiliser la m\u00e9thode de soudage de l'acier inoxydable 316L. Cependant, l'apport de chaleur et la temp\u00e9rature intercalaire doivent \u00eatre strictement contr\u00f4l\u00e9s pour maintenir le rapport aust\u00e9nite-ferrite souhait\u00e9 et \u00e9viter la pr\u00e9cipitation de phases interm\u00e9talliques n\u00e9fastes. Une petite quantit\u00e9 d'azote dans le gaz de soudage permet d'\u00e9viter ces probl\u00e8mes.<\/p>\n\n\n\n

Dans l'\u00e9valuation du proc\u00e9d\u00e9 de soudage de l'acier inoxydable duplex, la m\u00e9thode couramment utilis\u00e9e consiste \u00e0 \u00e9valuer le rapport aust\u00e9nite-ferrite \u00e0 l'aide d'un testeur de ferrite ou par inspection m\u00e9tallographique. Dans des cas typiques, la m\u00e9thode d'essai ASTM A 923 est utilis\u00e9e pour v\u00e9rifier la pr\u00e9sence de phases interm\u00e9talliques dangereuses.<\/p>\n\n\n\n

\"Soudage
Soudage orbital automatique de tuyaux et raccords en acier inoxydable<\/a> (source photo : ArcMachines)<\/figcaption><\/figure>\n\n\n\n

Le m\u00e9tal d'apport recommand\u00e9 pour la soudure est ER2209 (UNS S39209, EN 1600). Ce n'est que lorsque la soudure peut \u00eatre recuite en solution solide pour restaurer la r\u00e9sistance \u00e0 la corrosion apr\u00e8s le soudage, que le soudage par autofusion sans m\u00e9tal d'apport est recommand\u00e9. Pour le recuit de mise en solution, chauffez la pi\u00e8ce \u00e0 une temp\u00e9rature d'au moins 1900\u00b0F (1040\u00b0C) puis refroidissez-la rapidement.<\/p>\n\n\n\n

La p\u00e9n\u00e9tration et la fluidit\u00e9 de l'acier inoxydable duplex tel que le 2205 sont pires que celles de l'acier inoxydable 316L, la vitesse de soudage est donc plus lente. L'acier inoxydable 2205 duplex ayant une faible p\u00e9n\u00e9tration, il est n\u00e9cessaire de modifier la forme du joint. L'acier inoxydable duplex 2205 n\u00e9cessite un angle de biseau plus large, un espace de racine plus grand et des bords \u00e9mouss\u00e9s plus petits que l'acier inoxydable 316L afin d'obtenir une soudure enti\u00e8rement p\u00e9n\u00e9tr\u00e9e.<\/p>\n\n\n\n

Si l'\u00e9quipement de soudage permet l'utilisation de fil d'apport, le fil d'apport 2209 peut \u00eatre utilis\u00e9 pour le soudage orbital de tubes en acier inoxydable 2205. Il est \u00e9galement possible d'utiliser des inserts consommables avec des composants suralli\u00e9s de mani\u00e8re appropri\u00e9e au lieu de fils d'apport.<\/p>\n\n\n\n

Le tableau suivant r\u00e9capitule les mat\u00e9riaux des inserts utilis\u00e9s pour le soudage 2205 tuyaux en acier inoxydable duplex<\/a>.<\/p>\n\n\n\n\n \n \n \n \n
Ins\u00e9rer des mat\u00e9riaux<\/th>\n Alliage et qualit\u00e9s<\/th>\n <\/tr>\n
Alliage nickel chrome molybd\u00e8ne<\/td>\n UNS - N06625, N10276, N06022 (EN - 2.4856, 2.4819, 2.4602)<\/td>\n <\/tr>\n
6% Mo <\/td>\n UNS - N08367, S31254, N08926 (EN - NA., 1.4547, 1.4529)<\/td>\n <\/tr>\n
Super duplex<\/td>\n UNS - S32750, S32760 (EN - 1.4410, 1.4501)<\/td>\n <\/tr>\n<\/table>\n\n\n\n

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