Parameter optimization of dissimilar resistance spot welding on ultra-high strength hot-stamped steel and mild steel by numerical simulation

doi:10.11890/1006-7191-126-487

Abstract

Abstract:

In this study, a coupled axisymmetric finite element model (FEM) was built to simulate the resistance spot welding (RSW) process between ultra-high strength hot-stamped (UHSS) and mild steel by SORPAS software. Via simulating this process, the temperature distribution and dynamic temperature curves of the welding area were studied, and welding spatter phenomena were predicted and validated by comparing them with experimental results. By adjusting the welding parameters in numerical simulation, appropriate welding parameters were achieved. Moreover, the mechanical properties of the welding joints under the optimized conditions were also compared with those of not optimized. The study results have already been applied in a manufacturing production. It can also provide guidance for the RSW on UHSS and mild steel.

Key words: Ultra-high strength hot-stamped steel, Resistance spot welding, Numerical simulation, SORPAS

Wen ZHENG,Min WANG,Liang KONG,Xuanting CHENG,Ming LEI . Parameter optimization of dissimilar resistance spot welding on ultra-high strength hot-stamped steel and mild steel by numerical simulation[J]. Acta Metallurgica Sinica (English Letters), 2012, 25(6): 487-498.

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Parameter optimization of dissimilar resistance spot welding on ultra-high strength hot-stamped steel and mild steel by numerical simulation

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