闪速加热对2000 MPa级热成形钢显微组织和力学性能的影响

谢泽东, 丁灿灿, 温鹏宇, 罗海文

Effect of Flash Heating on Microstructure and Mechanical Properties of 2000 MPa Hot Stamping Steel

XIE Zedong, DING Cancan, WEN Pengyu, LUO Haiwen

图5 FH950和CH950样品的EBSD质量图和原奥晶界叠加图、大角度晶界EBSD像及原奥氏体晶粒和大角度晶粒尺寸统计分布图

Fig.5 EBSD quality map overlapped with outlined prior austenite grain boundaries with the misorientation between 20° and 50° (yellow lines) (a, b) and images on all the high angle grain boundaries with the misorientation > 15° (d, e) in FH950 (a, d) and CH950 (b, e) specimens; the distributions of prior austenite grain size (c) and high-angle grain size (f) derived from Figs.5d and e, respectively, in which high-angle grain size was defined by all the high angle grain boundaries and consistent with the Hall-Petch strengthening mechanism