Metal Forming Modelling Materials Properties Critical to Simulation of Hot Stamping

Reliable simulation of hot stamping process requires accurate material data. This paper describes the development of computer models that can provide many of the material data required, including TTT/CCT phase transformation diagrams, temperature dependent physical and thermophysical properties, as well as temperature and strain rate dependent mechanical properties including high temperature strength and flow stress curves. The calculated material data have been used to simulate the hot stamping production of a part made of steel 22MnB5. The simulation is carried out with coupled analysis of heat transfer, deformation mechanics and phase transformations. The simulated springback is in good agreement with the experimental observation.