Influence of spot welding parameters on Al-Si coated 22MnB5 for automotive application
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2017
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Resumo
The application of press hardening steels (PHS) Al-Si coating has
been increasing in body in white vehicles as an approach to meet the
demands of safety and CO2 reduction regulations. The vehicle
structures with PHS largely depend on the integrity and the
mechanical performance of the spots weld. During the spot welding
process, intermetallic phase may appear in function of the chemical
composition of the steel and coating. One of these intermetallics is
the Fe-Al phase which brittleness decreases the strength of the weld
joint. In this study, resistance spot welding (RSW) experiments were
performed in order to evaluate the influence of the welding
parameters of single-lap joints PHS - 22MnB5 steel grade. Welded
samples of the Al-Si coated PHS steel as received, i.e., before any
heat treatment and stamping, were evaluated by means of glow
discharge optical emission spectroscopy (GDOES) technique that
allows a quick and accurate evaluation of the chemical composition
profile along the spot weld thickness. The GDOES results showed
that the squeeze welding parameter has the higher influence on
cupper diffusion at the Al-Si-Fe layer. The pre-burn current and
welding current showed the higher influences in Fe-Al diffusion. The
pulse technique and post-heat treatment had had the lower influences
in Fe-Al diffusion.
Como referenciar
LARA, J.A.C.; COUTO, C.P.; COLOSIO, M.A.; ROSSI, J.L.; ABBADE, L.M. Influence of spot welding parameters on Al-Si coated 22MnB5 for automotive application. SAE Technical Paper, n. 2017-36-0225, p. 1-6, 2017. DOI: 10.4271/2017-36-0225. Disponível em: http://repositorio.ipen.br/handle/123456789/29232. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.