Numerical and experimental research on localized induction heating process for hot stamping steel sheets

Abstract

In this work, the localized induction heating for hot stamping steel sheets was introduced and studied through numerical and experimental methods. The electro-magnetic-temperature multi-field coupling simulation was performed with the ANSYS software. Simulation results showed that the higher temperature region and the transition region caused by the effect of the magnetizer piece should be minimized before industrial application. In order to solve this problem, two shape magnetizers (ring and U-shaped) were placed at different positions on the coils to minimize the effect. The simulation result was validated through the experiments. Experiment results showed that as-quenched part with tailored properties generated related to the different temperature regions of the steel sheet after the localized induction heating and water quenching. The simulation temperature distribution of the B-pillar shows that the localized induction heating can meet the requirements of the tailored temperature regions by using magnetizer rings. The localized induction heating promotes a new application of induction heating for hot stamping steel sheets.