Study On 22MnB5 B Pillar Hot Stamping Process

Hot stamping process of high-strength steel that has not only made the lightweight of automobile come true, but the automobile safety has also been improved, has been widely applied in foreign automobile industries, and has entered the domestic industries. From the point of engineering application, it is necessary in an actual project to study the processing of hot stamping and cooling to confirm, so that the process and equipment parameters that the size of component and metallographic structure need can be confirmed.In this paper, the hot stamping of a typical body part as B pillar is the example, and use the simulation software of ABAQUS is used as the tool to explore the influence in the stamping and cooling process under different parameters. As results, some reasonable process and equipment parameters are abtained.This article summarizes and analyzes some knowledge in microstructure and macroscopic heat conduction, and builds a finite element and material model of typical body part for hot stamping process simulation and process parameter optimization in hot stamping process and cooling process. In the simulation, the blank’s geometry, distribution and the process of stress and temperature is got. Referring to the simulation in the effect on hot stamping process under different blank’s initial temperature and moulds’ temperature, stamping speed, contact pressure, some results, which are, the most reasonable temperature, large influence in mould temperature and stamping speed for blank’s temperature range, and great effect on cooling rate under different contact pressures are got. Finally, an experiment with a typical automobile body part to compare the cooling performance under different contact pressures is excuted. As a result, controlled within certain range, the greater the contact pressure, the faster the cooling rate, and once the contact pressure is over the range, the cooling rate will not change, and then the simulation result will be proved this.