{"id":7938,"date":"2021-08-03T11:27:49","date_gmt":"2021-08-03T11:27:49","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=7938"},"modified":"2025-12-25T03:58:18","modified_gmt":"2025-12-25T03:58:18","slug":"soudage-de-lacier-inoxydable-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/soudage-de-lacier-inoxydable-duplex\/","title":{"rendered":"Soudage de l'acier inoxydable duplex"},"content":{"rendered":"
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Soudage de l'acier inoxydable duplex<\/h2>\n\n\n\n

Tuyaux et raccords en acier inoxydable duplex<\/a> pr\u00e9sente les avantages de la ferrite et de l'aust\u00e9nite. Et la famille des aciers inoxydables duplex fonctionne bien en termes de r\u00e9sistance \u00e0 la corrosion, de r\u00e9sistance et de t\u00e9nacit\u00e9. Et tous sont faciles \u00e0 souder. Le soudage avec de l'acier inoxydable duplex peut am\u00e9liorer la r\u00e9sistance et la r\u00e9sistance \u00e0 la corrosion.<\/p>\n\n\n\n

Le noyau de Soudage en acier inoxydable duplex<\/strong><\/h2>\n\n\n\n

Pendant le soudage, un m\u00e9tal filtrant est requis. Et le soudage par autofusion n'est pas recommand\u00e9. Pour l'extr\u00e9mit\u00e9 \u00e0 souder, pour obtenir une soudure \u00e0 p\u00e9n\u00e9tration compl\u00e8te appropri\u00e9e, un jeu de soudure plus large et un angle d'extr\u00e9mit\u00e9 plus grand doivent \u00eatre adopt\u00e9s par rapport \u00e0 l'acier inoxydable normal. Au passage de racine, il adoptera le gaz protecteur. Le gaz peut \u00eatre de l'argon, un m\u00e9lange d'argon et d'azote, ou de l'azote, ce qui peut am\u00e9liorer la r\u00e9sistance \u00e0 la corrosion des racines. Le choix efficace du gaz protecteur est tr\u00e8s important pour tous les aciers inoxydables. En outre, un refroidissement rapide doit \u00eatre \u00e9vit\u00e9 car il d\u00e9truirait la structure du mat\u00e9riau. Un faible apport de chaleur doit \u00e9galement \u00eatre \u00e9vit\u00e9, comme pendant le soudage de r\u00e9paration. Lors du soudage de tubes et de plaques tubulaires, il est pr\u00e9f\u00e9rable d'utiliser le TIG et de prendre Ar+3%N2 comme gaz protecteur. Pour les soudures d'un seul c\u00f4t\u00e9, le soudage TIG est fortement recommand\u00e9 pour les soudures de passe de fond. En g\u00e9n\u00e9ral, lorsque l'acier inoxydable duplex est soud\u00e9 avec d'autres aciers, il est recommand\u00e9 d'utiliser des consommables de soudage duplex.<\/p>\n\n\n\n

\"soudure-du-duplex-acier-inox\"<\/a><\/figure>\n\n\n\n

M\u00e9thodes de soudage<\/strong><\/h2>\n\n\n\n

TlG (GTAW\/141) Soudage au gaz inerte au tungst\u00e8ne<\/p>\n\n\n\n

Soudage \u00e9lectrique manuel MMA (SMAW\/111)<\/p>\n\n\n\n

MIG (GMAW\/131 135) - Soudage au gaz inerte des m\u00e9taux<\/p>\n\n\n\n

SAW (12) \u2013 Soudage \u00e0 l'arc submerg\u00e9<\/p>\n\n\n\n

Les m\u00e9thodes de soudage standard conviennent \u00e9galement \u00e0 l'acier inoxydable duplex.<\/p>\n\n\n\n

L'apport de chaleur doit \u00eatre s\u00e9lectionn\u00e9 en fonction de l'\u00e9paisseur de la paroi et du proc\u00e9d\u00e9 de soudage du mat\u00e9riau. Lorsque la temp\u00e9rature est tr\u00e8s \u00e9lev\u00e9e, l'acier de base et le m\u00e9tal d'apport sont en ferrite 100%. Avec la diminution de la temp\u00e9rature, l'aust\u00e9nite pr\u00e9cipite progressivement de la ferrite et forme finalement la microstructure de l'acier inoxydable duplex. Dans la zone affect\u00e9e thermiquement lors du soudage, la formation d'aust\u00e9nite est tr\u00e8s importante. Pour obtenir une excellente soudabilit\u00e9, un refroidissement rapide doit \u00eatre \u00e9vit\u00e9. Par cons\u00e9quent, les \u00e9l\u00e9ments soud\u00e9s \u00e9pais n\u00e9cessitent une limite d'\u00e9nergie d'arc sup\u00e9rieure et un apport de chaleur inf\u00e9rieur pour les \u00e9l\u00e9ments soud\u00e9s plus minces. D'un autre c\u00f4t\u00e9, pour l'acier duplex fortement alli\u00e9, un refroidissement trop lent dans la plage de temp\u00e9rature critique sera \u00e9galement nocif. Ceci est particuli\u00e8rement important pour les m\u00e9taux soud\u00e9s. Par cons\u00e9quent, la temp\u00e9rature intercalaire pour 2507 ne doit pas d\u00e9passer 150 degr\u00e9s Celsius.<\/p>\n\n\n\n

Attention<\/strong> de soudage<\/h2>\n\n\n\n

Dans la norme EN, la temp\u00e9rature de service maximale pour tous les aciers duplex ne doit pas d\u00e9passer 250 \u00b0C. Le cuivre doit \u00eatre \u00e9vit\u00e9 comme plaque arri\u00e8re pour le soudage, o\u00f9 il y a un risque de refroidissement trop rapide. Et l'impact de l'arc \u00e0 l'ext\u00e9rieur de la soudure doit \u00e9galement \u00eatre \u00e9vit\u00e9 car il acc\u00e9l\u00e9rera le refroidissement. De plus, les brosses en acier ne sont pas sugg\u00e9r\u00e9es pour nettoyer les soudures, ou cela entra\u00eenerait des risques de microfissures.<\/p>\n\n\n\n

Kaysuns fournit des tuyaux et des raccords soud\u00e9s en acier inoxydable duplex pour le dessalement offshore et d'eau de mer, ainsi que d'autres industries n\u00e9cessitant un mat\u00e9riau \u00e0 haute r\u00e9sistance.<\/p>\n\n\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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