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为探索利用金属磁记忆技术进行再制造毛坯质量控制的方式方法,制作了18CrNiWA钢退火处理和调质处理的板状静载拉伸试件,在MTS810型液压饲服试验机上进行了拉伸试验,采用EMS2003金属磁记忆仪检测拉伸过程试件表面磁记忆信号变化,并利用OLYMPUSGX51观察了2种热处理状态的金相组织。研究结果表明:轴向拉伸载荷诱发试件产生磁有序状态,磁信号曲线在弹性和塑性变形阶段内呈现不同分布特征,磁曲线斜率Ks可以表征拉应力导致的变形程度;2种试件微观组织不同导致拉伸过程中呈现不同的力磁效应。
In order to explore the method of remanufacturing rough quality control using metal magnetic memory technology, a plate static tensile test specimen of 18CrNiWA steel was prepared by annealing treatment and quenching treatment. Tensile test was carried out on MTS810 hydraulic pressure testing machine , The change of magnetic memory signal on the surface of specimen during tensile test was detected by EMS2003 metal magnetic memory, and the microstructure of two kinds of heat-treated state was observed by OLYMPUS GX51. The results show that the axial tensile load induces the magnetic ordering state, and the magnetic signal curve shows different distribution characteristics during the elastic and plastic deformation stages. The slope of the magnetic curve Ks can characterize the deformation caused by tensile stress. Two kinds of specimens Different microstructures lead to different force-magnetic effects during the stretching process.