两种受电靴材料与不锈钢带电接触摩擦磨损特性的试验研究

在销-盘式摩擦磨损试验机上分别进行了不锈钢／铜基烧结合金材料和不锈钢／铜石墨烧结材料接触的载流摩擦磨损行为的试验研究。在试验中记录了摩擦因数和磨损量的变化，并对磨痕形貌进行了光学显微镜观察。结果显示，电流对2种摩擦副带电接触的摩擦磨损行为有重要的影响。2种材料的摩擦因数随电流的增大而呈现截然相反的变化趋势，但两者的磨损量却随电流的增加而增大。不锈钢／铜基烧结合金材料的磨损机制主要是粘着磨损及氧化磨损。不锈钢／铜石墨烧结材料磨损机制包括磨粒、粘着磨损和电弧烧蚀，其中电弧烧蚀对磨损量的影响随电流的增大而增加。

Experimental Study on Friction and Wear of Copper-based Sintered Alloy and Copper-graphite Sintered Alloy against Stainless Steel

A series of experimental tests were carried out using stainless steel rubbing against copper based sintered alloy and copper-graphite sintered alloy with electrical current on a pin-on-disc test rig. During the test, the friction coefficient and wear loss were collected. The worn surfaces were observed with an optical microscope. The result shows that electrical current intensity has a distinct effect on the friction and wear behavior of two different material couples. With increasing electrical current intensity,the friction coefficient increases for the copper based sintered alloy couple but decreases for the copper-graphite sintered alloy couple. The wear losses of both couples increase with increasing electrical current intensity. The wear mechanism of stainless steel against copper based sintered alloy is mainly attributed to adhesion, abrasion and oxidation. The wear mechanism of stainless steel against copper-graphite sintered alloy mainly includes abrasion, adhesion and electrical arc ablation which aggravates with increasing electrical current intensity.