卷取温度对500 MPa级热冲压桥壳用钢组织与力学性能的影响
惠亚军1,2(
), 刘锟1, 吴科敏3, 李秋寒1, 牛涛4, 武巧玲4
), 刘锟1, 吴科敏3, 李秋寒1, 牛涛4, 武巧玲4
Effect of Coiling Temperature on Microstructure and Mechanical Properties of 500 MPa Grade Hot Stamping Axle Housing Steel
HUI Yajun1,2(), LIU Kun1, WU Kemin3, LI Qiuhan1, NIU Tao4, WU Qiaoling4
), LIU Kun1, WU Kemin3, LI Qiuhan1, NIU Tao4, WU Qiaoling4
图9. 500 MPa级热冲压桥壳用钢在铁素体(F)区的形核率-温度(NrT)曲线和析出-温度-时间(PTT)曲线
Fig.9. Nucleation rate-temperature (NrT) curve (a) and precipitation-temperature-time (PTT) curve (b) of 500 MPa grade hot stamping axle housing steel in ferrite (I—nucleation rate, K—constant, subscript d indicates nucleation on the dis-location; t0.05da—nucleation start time of the precipitates when the precipitates nucleate on the dislocation line, and the nucleation rate quickly decays to zero; t0.05da/t0da—relative nucleation start time)
