Abstract： In order to determine the heating specification of coldrolled boron steel B1500HS with a thickness of 1.8 mm, the effect of austenitizing temperature and soaking time on the quenching microstructures, original austenite grain sizes and mechanical properties were investigated. The Vshaped bending die with a cooling channel was used to conduct the hot stamping experiment of B1500HS steel and cold stamping test of M1200 fully martensite steel. The results indicate that the tensile strength of hot stamping part is up to 1.530 GPa, and the profile has a perfect precision with almost no springback. Compared with the hot stamping process of B1500HS, the cold stamping process of M1200 martensite steel requires much higher forming load, approximately 750 kN, which is twice as much as that of hot stamping process. In addition, the part of cold stamping obviously has springback and the springback angle is approximately 9°.
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