回火温度对<strong>1000 MPa</strong>级<strong>NiCrMoV</strong>低碳合金钢微观组织和低温韧性的影响

回火温度对1000 MPa级NiCrMoV低碳合金钢微观组织和低温韧性的影响

周成, 赵坦, 叶其斌, 田勇, 王昭东, 高秀华

Effects of Tempering Temperature on Microstructure and Low-Temperature Toughness of 1000 MPa Grade NiCrMoV Low Carbon Alloyed Steel

ZHOU Cheng, ZHAO Tan, YE Qibin, TIAN Yong, WANG Zhaodong, GAO Xiuhua

图 9 NiCrMoV低碳合金钢在600和650℃回火过程中的膨胀曲线

Fig.9 Dilatometer curves of the NiCrMoV low carbon alloyed steel during tempering at 600 and 650^oC
(a) dilatation-temperature curve (M_s—start temperature of martensite transformation)
(b) dilatation-time curve
(c) relative change in dilatation curves