Abstract
It is known that the appropriate welding current range (WCR) in resistance spot welding of aluminized hot-stamped steel sheets is influenced by heating conditions prior to the hot-stamping. In this study, the thermal and electrical contact resistance between hot-stamped surfaces in the resistance spot welding is modelled considering the mechanical, thermal and electrical characteristics, which are dependent on the multi-layered coating structures evolved during heating. Developed contact resistance model is incorporated to the resistance spot welding simulation, to show that longer dwell time narrows the WCR as experimental results show.
