Efeito do aporte térmico no revestimento de aço inoxidável super austenítico durante o processo GTAW em aços baixo carbono
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Aços inoxidáveis superausteníticos. Aporte térmico. Revestimento. GTAW. Resistência à corrosão.Resumo
Os aços inoxidáveis super austeníticos possuem alta resistência mecânica e à corrosão, sendo amplamente utilizados na indústria de óleo e gás. No entanto, a soldagem pode causar alterações na microestrutura, impactando suas propriedades. Este trabalho avalia a influência do aporte térmico no revestimento de aço inoxidável super austenítico AISI 904L sobre aço baixo carbono ASTM A516 Grau 70, utilizando o processo GTAW. Foram realizadas análises macro e microestruturais, medições de microdureza e testes de corrosão para duas condições de soldagem. Os resultados demonstraram que o aporte térmico influencia significativamente as propriedades do revestimento, com diluição reduzida e aumento na microdureza. Além disso, a resistência à corrosão do revestimento foi superior à do substrato, aproximando-se das propriedades do AISI 904L.
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