Test on hot stamping process of automotive ultra high strength steel beams

Ultra high strength steel 22MnB5 used for automobile is selected for study.Direct hot stamping process and indirect hot stamping process were used for the automobile beam forming test.The microstructure of the samples was analyzed by microscope,and the tension strength and the hardness distribution of the samples were tested.The test results show that the microstructure of formed parts is ideal lath martensite,and tensile strength is greater than 1500 MPa,the hardness greater than 450 HV.The results fully meet the actual production requirements.According to the actual production situation,the appropriate forming process may be selected.