{"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":"soldagem-de-aco-inoxidavel-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/soldagem-de-aco-inoxidavel-duplex\/","title":{"rendered":"Soldagem de A\u00e7o Inoxid\u00e1vel Duplex"},"content":{"rendered":"
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Soldagem de A\u00e7o Inoxid\u00e1vel Duplex<\/h2>\n\n\n\n

Tubo e acess\u00f3rios de a\u00e7o inoxid\u00e1vel duplex<\/a> tem as vantagens da ferrita e da austenita. E a fam\u00edlia de a\u00e7o inoxid\u00e1vel duplex tem um bom desempenho em resist\u00eancia \u00e0 corros\u00e3o, resist\u00eancia e tenacidade. E todos eles s\u00e3o f\u00e1ceis de soldar. A soldagem com a\u00e7o inoxid\u00e1vel duplex pode melhorar a resist\u00eancia e a resist\u00eancia \u00e0 corros\u00e3o.<\/p>\n\n\n\n

O n\u00facleo de Soldagem Duplex de A\u00e7o Inoxid\u00e1vel<\/strong><\/h2>\n\n\n\n

Durante a soldagem, o metal de filtro \u00e9 necess\u00e1rio. E a soldagem por autofus\u00e3o n\u00e3o \u00e9 recomendada. Para a extremidade da soldagem, para obter uma solda de penetra\u00e7\u00e3o total adequada, uma folga de solda mais ampla e um \u00e2ngulo de extremidade maior devem ser adotados em compara\u00e7\u00e3o com o a\u00e7o inoxid\u00e1vel normal. Na passagem de raiz, ele deve adotar o g\u00e1s de prote\u00e7\u00e3o. O g\u00e1s pode ser arg\u00f4nio, mistura de arg\u00f4nio e nitrog\u00eanio ou nitrog\u00eanio, que pode melhorar a resist\u00eancia \u00e0 corros\u00e3o da passagem de raiz. A escolha eficaz do g\u00e1s de prote\u00e7\u00e3o \u00e9 muito importante para todos os a\u00e7os inoxid\u00e1veis. Al\u00e9m disso, o resfriamento r\u00e1pido deve ser evitado, pois isso destruir\u00e1 a estrutura do material. A baixa entrada de calor tamb\u00e9m deve ser evitada, como durante a soldagem de reparo. Ao soldar tubos e chapas de tubos, \u00e9 melhor usar TIG e tomar Ar + 3%N2 como g\u00e1s de prote\u00e7\u00e3o. Para soldas de um lado, a soldagem TlG \u00e9 fortemente recomendada para soldas de passe de raiz. Em geral, quando o a\u00e7o inoxid\u00e1vel duplex \u00e9 soldado com outros a\u00e7os, \u00e9 recomendado o uso de consum\u00edveis de soldagem duplex.<\/p>\n\n\n\n

\"soldagem-de-duplex-a\u00e7o<\/a><\/figure>\n\n\n\n

M\u00e9todos de Soldagem<\/strong><\/h2>\n\n\n\n

TlG (GTAW \/ 141) Soldagem de g\u00e1s inerte de tungst\u00eanio<\/p>\n\n\n\n

Soldagem el\u00e9trica manual MMA (SMAW \/ 111)<\/p>\n\n\n\n

MIG (GMAW \/ 131,135) - Soldagem de g\u00e1s inerte de metal<\/p>\n\n\n\n

SAW (12) - Soldagem por Arco Submerso<\/p>\n\n\n\n

Os m\u00e9todos de soldagem padr\u00e3o tamb\u00e9m s\u00e3o adequados para a\u00e7o inoxid\u00e1vel duplex.<\/p>\n\n\n\n

A entrada de calor deve ser selecionada de acordo com a espessura da parede e o processo de soldagem do material. Quando a temperatura est\u00e1 muito alta, tanto o a\u00e7o base quanto o metal de solda s\u00e3o ferrita 100%. Com a diminui\u00e7\u00e3o da temperatura, a austenita precipita gradativamente da ferrita e, finalmente, forma a microestrutura do a\u00e7o inoxid\u00e1vel duplex. Na zona afetada pelo calor na soldagem, a forma\u00e7\u00e3o de austenita \u00e9 muito importante. Para obter excelente soldabilidade, o resfriamento r\u00e1pido deve ser evitado. Portanto, itens de solda grossos requerem um limite superior de energia de arco e uma entrada de calor mais baixa para itens de solda mais finos. Por outro lado, para a\u00e7o duplex de alta liga, o resfriamento na faixa cr\u00edtica de temperatura muito lento tamb\u00e9m ser\u00e1 prejudicial. Isso \u00e9 especialmente importante para metais de solda. Portanto, a temperatura da camada intermedi\u00e1ria para 2507 n\u00e3o deve exceder 150 graus Celsius.<\/p>\n\n\n\n

Aten\u00e7\u00f5es<\/strong> de soldagem<\/h2>\n\n\n\n

Na norma EN, a temperatura m\u00e1xima de servi\u00e7o para todos os a\u00e7os duplex n\u00e3o deve exceder 250 \u00b0 C. O cobre deve ser evitado como placa de apoio para soldagem, onde existe o risco de resfriamento muito r\u00e1pido. E o impacto do arco fora da solda tamb\u00e9m deve ser evitado, pois tornar\u00e1 o resfriamento mais r\u00e1pido. Al\u00e9m disso, as escovas de a\u00e7o n\u00e3o s\u00e3o indicadas para limpar soldas, ou acarretar\u00e3o riscos de microfissuras.<\/p>\n\n\n\n

A Kaysuns fornece tubos e conex\u00f5es soldadas de a\u00e7o inoxid\u00e1vel duplex para dessaliniza\u00e7\u00e3o offshore e de \u00e1gua do mar, bem como outras ind\u00fastrias onde precisam de material de alta resist\u00eancia.<\/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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Talvez voc\u00ea tamb\u00e9m queira ler:
Problemas comuns do Super Duplex durante o uso<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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