Influência da rugosidade superficial na molhabilidade de cordões de solda
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Data
2023-08-10
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Universidade Federal de Goiás
Resumo
Wettability in weld beads is related to the convexity of the bead and the contact angle with the base material surface. This is an important parameter for weld quality since beads with high convexity can create stress concentrators in parts subjected to cyclic stresses and lack of fill in coating operations. Therefore, the objective of this study is to evaluate whether the surface finish of the base material will influence the wettability of weld beads on carbon
steel sheet using the MIG/MAG process. The method used involved generating different levels of roughness through machining processes. The roughness was then measured, and weld beads were performed on each of the surfaces. Welding tests were conducted using two shielding gases to verify if the same behavior would be observed for each of them. The criterion used was the measurement of the contact angle of the bead edges from cross-sectional cuts
analyzed by macrographs. The results showed that it was not possible to observe a noticeable change in the contact angle as a function of roughness using the method employed, which proved to be limited for the proposed objective
Descrição
Palavras-chave
Molhabilidade, Rugosidade superficial, Soldagem, MIG/MAG, Wettability, Surface roughness, Welding
Citação
MATEUS, Lucca Castro Gonçalves de. Influência da rugosidade superficial na molhabilidade de cordões de solda. 2023. 23 f. Trabalho de Conclusão de Curso (Bacharelado em Engenharia Mecânica) - Escola de Engenharia Elétrica, Mecânica e de Computação, Universidade Federal de Goiás, Goiânia, 2023.