热成形汽车钢的弯曲韧性与氢脆行为研究进展

杜德灏, 管明, 曹祚恒, 王铭, 何斌斌, 黄明欣

A Review of Current State and Prospects of the Bendability and Hydrogen Embrittlement Behavior of Press- Hardening Automobile Steels

DU Dehao, GUAN Ming, CAO Zuoheng, WANG Ming, HE Binbin, HUANG Mingxin

表1 典型热成形钢的化学成分和抗拉强度[11~14]

Table 1 Chemical compositions and tensile strengths of typical press-hardening steels[11-14]

Steel Chemical composition (mass fraction / %) Tensile strength MPa C Mn B Si Cr Ti Nb V Mo 22MnB5[11] 0.23 1.18 0.002 0.22 0.16 0.040 - - - 1478 25MnB5[11] 0.25 1.24 0.002 0.21 0.34 0.042 - - - 1611 28MnB5[11] 0.28 1.30 0.005 0.40 - - - - - 1740 30MnB5[14] 0.30 1.58 0.005 0.33 0.36 0.055 - 0.04 - 1880 32MnB5[12] 0.32 1.20 0.003 0.25 0.12 0.030 0.05 - - 1904 34MnB5[11] 0.34 1.30 0.005 0.40 - - - - - 1919 35MnB5[13] 0.36 1.40 0.003 0.20 - - - - - 2000 37MnB4[11] 0.37 0.81 0.001 0.31 0.19 0.046 - - - 2040 38MnB5[11] 0.38 1.20 0.003 0.19 0.28 0.024 - - 0.005 2181