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为提高再制造铜制衬套的耐磨损性能,运用超音速微粒沉积技术在铜合金基体表面制备镍基合金涂层,采用SEM,XRD和EDS等试验仪器表征涂层的组织、相结构以及氧含量等,运用显微硬度仪、拉伸试验机和CETR摩擦磨损试验机等试验设备分析涂层的力学性能和摩擦学性能。结果表明:超音速微粒沉积镍基合金涂层表面平整,结构致密,孔隙率低(0.4%),涂层与基体结合良好,结合强度达52.8 MPa,涂层平均显微硬度HV0.2为703(较基体提高7倍以上),磨损体积仅为基体的1.48%,对提高再制造铜制衬套的使用寿命具有重要意义。
In order to improve the wear resistance of remanufactured copper bushes, a nickel-based alloy coating was prepared on the surface of copper alloy substrate by supersonic particle deposition technique. The microstructure, phase structure and phase structure of the coating were characterized by SEM, XRD and EDS Oxygen content and so on, the mechanical and tribological properties of the coatings were analyzed by using the test equipment such as microhardness tester, tensile tester and CETR friction and wear tester. The results show that the surface of the Ni - based alloy coating deposited by supersonic particle deposition has a smooth surface, compact structure, low porosity (0.4%), good cohesion between the coating and the substrate, bonding strength of 52.8 MPa and average microhardness HV0.2 of 703 (More than seven times more than the base), wear volume of only 1.48% of the matrix, to improve the life of remanufactured brass bushings of great significance.