磁记忆对45号钢回火效果及力学性能的评估

Tempering effect and mechanical properties evaluating of 45 steel by magnetic memory method

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。

Effect of tempering temperature on magnetic memory signal and mechanical properties of a 45 steel was studied.Magnetic memory signal characterizations of the various stages of tempered steel were recorded in tensile process.The relationship between the magnetic memory signal and mechanical property parameters was established.Changing mechanisms of magnetic memory signal of different tempered specimens were clarified in tensile process.The results show that magnetic memory technique which is a new nondestructive testing method can evaluate the tempering effect quickly and effectively.It can also evaluate the damage degree of the various stages of tempered steel in tensile process.