Prediction of springback during indirect hot press forming through tensile test with simultaneous cooling

Abstract

Due to the demand for reduced weight, improved safety, and crashworthiness in vehicles, the need to manufacture automobile structural components from ultrahigh-strength steels is apparent. Indirect hot press forming process is a process developed from hot press forming because of steel’s high resistance to trimming after hot press forming. From the researches about indirect hot press forming, considerable springback in the indirect hot press forming is accrued after preforming. After this trimming, the material is calibrated by hot press forming process. In this article, the springback is accrued at preforming and the final shape of u-bending with varying cooling rates is predicted using ABAQUS software. To find the characteristics and effects of temperature changes during the hot press forming process, high-temperature tensile test with simultaneous cooling is conducted and the results are applied to the analysis. The shape deviations after the indirect hot press forming process are compared according to cooling rate conditions.