通过真空感应熔炼加热挤压法制备LAZ532-x(RE,Cu,Sn)镁锂合金,采用光学显微镜和X射线衍射仪对合金显微组织和物相进行观察和分析。在40~120 N载荷下,以不同线速度进行干摩擦磨损实验,对其摩擦磨损机理进行研究。结果表明,合金的磨损失重量在不同的线速度下均随磨损载荷的增加而呈线性增加,随着载荷的增加,合金的磨损形式从轻微磨粒磨损转变为严重磨粒磨损,最终剥落。 LAZ532-x (RE, Cu, Sn) Mg-Li alloy was prepared by vacuum induction melting and heating extrusion method. The microstructure and phase of the alloy were observed and analyzed by optical microscope and X-ray diffraction. Under the load of 40-120 N, the dry friction and wear tests were carried out at different linear velocities, and the friction and wear mechanisms were studied. The results show that the wear loss of the alloy increases linearly with the increase of the wear rate under different linear velocities. With the increase of the load, the wear form of the alloy changes from slight wear to severe wear and eventually peel off.