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Abstract
In order to establish the process specification of the hot stamping process for high strength steel components, which are largely used in the automobile industry, the characteristics of forming processes and the phase transition have been investigated. Based on a phase change model, a thermomechanical–metallurgical model for high strength steel has been established. In a multiphysical coupling calculation platform, the microstructure changes of ADVANCE1500 (22SiMnTiB) during its hot stamping process are obtained. Numerical results show that the finite element model is effective in simulation of hot forming process. Die gap and contact state between sheet and dies have considerable influence on the temperature distribution of the sheet. At the end of the process, U shaped parts at the bottom and sidewall areas have higher temperature, which leads to austenite–martensite transformation but not to a full level.
