Al42CrMo螺栓钢淬透性及组织的影响
吕超然1, 徐乐1(), 史超2, 刘进德3, 蒋伟斌4, 王毛球1
Effect of Al on Hardenability and Microstructure of 42CrMo Bolt Steel
LU Chaoran1, XU Le1(), SHI Chao2, LIU Jinde3, JIANG Weibin4, WANG Maoqiu1

图2. 实验用钢的截面硬度曲线

Fig.2. Cross-sectional hardness curves of the tested steels with the diameters of 42 mm (a), 48 mm (b) and 56 mm (c) (R—radius of cross section)