M50钢中 M2C一次碳化物高温转变机制

马芳, 陆星宇, 周丽娜, 杜宁宇, 类承帅, 刘宏伟, 李殿中

High-Temperature Decomposition Mechanism of M2C Primary Carbide in M50 Steel

MA Fang, LU Xingyu, ZHOU Lina, DU Ningyu, LEI Chengshuai, LIU Hongwei, LI Dianzhong

图7 经1180℃保温20 h高温扩散处理后M50钢微观组织的SEM-BSE像

Fig.7 SEM-BSE images of the microstructure of M50 steel after heat-treating at 1180oC for 20 h (a) macroscopic morphology of the microstructure (b) retained M2C carbide (c, d) high magnified images of positions 1 (c) and 2 (d) in Fig.7b (Arrows in Fig.7d show newborn MC carbides transformed from M2C)