载流摩擦参数对铜基复合材料起弧率及载流摩擦学性能的影响  

Effect of Friction Parameters with Current on Arc Rate and Current-Carrying Tribological Properties

作　　者：吕乐华[1] 孙乐民[1] 上官宝[1] 张永振[1] 杨正海[1] 

机构地区：[1]河南科技大学河南省材料摩擦学重点实验室,洛阳471003

出　　处：《机械工程材料》2014年第1期60-63,共4页Materials For Mechanical Engineering

基　　金：国家重点联合基金资助项目(U1034002);国家自然科学基金资助项目(50975078);国家"973"计划前期研究专项(2010CB635113);河南省科技厅省院科技合作项目(112106000034)

摘　　要：采用压制烧结方法制备了石墨质量分数为10%的铜基复合材料,并将其与QCr0.5铜合金组成摩擦副,在自制的销盘摩擦磨损试验机上进行了载流摩擦磨损试验,研究了摩擦速度和电流密度对复合材料起弧率、载流效率以及摩擦学性能的影响,并对复合材料的磨损形貌进了观察。结果表明:随着电流密度的增大,复合材料的起弧率和磨损率逐渐增大,摩擦因数和载流效率逐渐降低;随着摩擦速度的增大,复合材料的起弧率、摩擦因数和磨损率均逐渐增大,而载流效率则逐渐减小;随着电流密度和摩擦速度的增大,复合材料在摩擦过程中的烧蚀变得越发严重,表面变得更加粗糙。A Cue-based composite with graphite content of 10wt% was prepared by pressure smtermg method, and then the current carrying friction and wear experiments were carried out on a self-made pin-disk tester with a friction pair composed of the composite and QCr0. 5 copper alloy, and the effects of friction velocity and current density on arc rate, current-carrying efficiency and tribological properties. The worn surface morphology of the composite was observed. The results show that, with the increase of current density, the arc rate and wear rate of the composite increased, but friction coefficient and current-carrying efficiency decreased. The arc rate, friction coefficient and wear rate increased gradually and current-carrying efficiency reduced gradually with the increase of friction velocity. With the increase of current density and friction velocity, the surface erosion of the composite became serious and its surface become rougher.

关 键 词：铜基复合材料 起弧率 载流效率 摩擦因数 磨损率 

分 类 号：TB331[一般工业技术—材料科学与工程]