Evaluation of microstructure and properties of warm #br#
stamped medium manganese steel
WANG Cunyu1,2,ZHOU Mingbo3,LI Xiaodong4,ZHAO Hailong5,#br#
CAO Wenquan1,DONG Han1
(1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China;
2. East China Branch, Central Iron and Steel Research Institute, Huai’an 223005, Jiangsu, China;
3. CATARCC (Tianjin) Automotive Engineering Research Institute Co., Ltd., Tianjin 300300, China;
4. School of Automotive Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
5. New Technology Institute, Beijing Automotive Group Co., Ltd., Beijing 101300, China)
Abstract:Hot stamping parts have been widely used in automotive safety parts,in order to further enhance the impact safety of parts,improve surface quality and reduce cost,a kind of hot stamping technology based on medium manganese steel is proposed to reduce heating temperature,ultrahigh strength mechanical properties were obtained by quenching completely austenitized medium manganese steel into martensite inside die. Compared with the hot stamped 22MnB5 steel,the heating temperature of warm stamped medium manganese steel decreases by more than 150 ℃ when obtains the tensile strength of 1 500 MPa,the plasticity increases by more than 30%,and the surface quality of parts is improved. The microstructure,mechanical properties,cold bending properties,TFLC and resistance spot welding of warm stampede medium manganese steel were reviewed and evaluated. The results were compared with those of hot stamping 22MnB5 steel. It shows the technical advantages of warm forming of medium manganese steel in energy saving,environmental protection and improving collision safety.
王存宇,周明博,李晓东,赵海龙,曹文全,董瀚. 温成形中锰钢的组织性能评价[J]. 钢铁, 2019, 54(10): 58-65.
WANG Cunyu1,2,ZHOU Mingbo3,LI Xiaodong4,ZHAO Hailong5,. Evaluation of microstructure and properties of warm #br#
stamped medium manganese steel. Iron and Steel, 2019, 54(10): 58-65.