研究了回火温度对45号钢磁记忆信号及其力学性能的影响,记录回火钢拉伸过程的各阶段磁记忆信号表征,建立磁记忆信号与力学性能参数的关系,阐明不同回火试件拉伸过程磁记忆信号变化机理。结果表明,磁记忆作为一种新兴无损检测方法能够快速、有效的评价回火效果,并能对回火钢拉伸过程各阶段的损伤程度进行判断。 The effect of tempering temperature on magnetic memory signal and mechanical properties of 45 steel was studied. The magnetic memory signal characterization was recorded during each phase of tempering steel tensile process. The relationship between magnetic memory signal and mechanical properties parameters was established. Part stretching mechanism of magnetic memory signal change mechanism. The results show that magnetic memory, as a new nondestructive testing method, can evaluate the tempering effect quickly and effectively, and can judge the damage degree of each stage of the tempering steel.