|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Comparison of the Hot-stamped Boron-alloyed Steel and the Warm-stamped Medium-Mn Steel on Microstructure and Mechanical Properties
||Ying Chang, Cunyu Wang, Xiaodong Li, Guojun Zheng, Han Dong
|On-Site Speaker (Planned)
Application of the high strength steel becomes an effective way to improve the lightweight and safety of automotive. Therefore, improvements in mechanical properties are needed. In this study, a warm-stamping process of the third-generation automotive medium-Mn (TAMM) steel was studied in microstructure and mechanical properties, compared to the popular hot-stamping process of 22MnB5 steel. The results indicate that the warm-stamping process parameters can be designed flexibly and the influence of process parameters on the martensitic transformation kinetics of TAMM steel is not obvious and can be neglected. The warm-stamped TAMM steel holds the complete fine-grained martensitic microstructure without decarbonization layer and higher comprehensive properties than the hot-stamped 22MnB5 steel. Furthermore, an actual warm-stamped B-pillar of TAMM steel is stamped to show the evenly-distributed microstructure and mechanical properties. Thus, the warm-stamped TAMM steel part is promising for the industrial production of automotive structural parts instead of the hot-stamped 22MnB5 steel part.
||Planned: Supplemental Proceedings volume