Artigo

Efeitos do comprimento de reversão e do ângulo de ataque sobre a estrutura de solidificação do cordão em soldagem MIG/MAG com "Switch Back"

The welding technique denominated switch-back technique consists in a torch oscillation in the welding direction rather than transversally. However, there is not much information in literature about the solidification structure of the bead when this technique is applied. Therefore, in this work is p...

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Autor principal: ALMEIDA, Hélio Antônio Lameira de
Outros Autores: MOTA, Carlos Alberto Mendes da, SCOTTI, Américo
Grau: Artigo
Idioma: por
Publicado em: Universidade Federal do Pará 2018
Assuntos:
Acesso em linha: http://repositorio.ufpa.br/jspui/handle/2011/10360
http://dx.doi.org/10.1590/S0104-92242012000200006
Resumo:
The welding technique denominated switch-back technique consists in a torch oscillation in the welding direction rather than transversally. However, there is not much information in literature about the solidification structure of the bead when this technique is applied. Therefore, in this work is presented a study on the effect of the torch leading angle and of the reversion course length over the bead solidification structure. Welds were carried out with Pulsed MIG/MAG Process on plain carbon steel plates. The results showed that the parameters under analysis modify the solidification mode of the bead. In general, when the angle of torch leads to pushing-pulling movement, equiaxial grains near the fusion line is favored. In relation to the course length, its increase leads to finer solidification structure.