Cu-Ag-Cr合金电摩擦性能研究

摘要

通过性能测试、扫描电子显微镜和透射电子显微镜分析等方法,对Cu-Ag-Cr合金的受流磨损性能进行了研究,探讨了该合金的受流磨损机理,并与Cu-Ag合金的受流磨损性能进行了对比.磨损试验采用自制的试验设备在干滑动的条件下进行,与合金对摩的是铜基粉末冶金材料.结果表明:Cu-Ag-Cr合金的磨损率随着滑动速度和滑行距离的增大而增大;合金在受流状态下的磨损机制主要是粘着磨损、磨粒磨损和电侵蚀磨损;在相同的试验条件下,Cu-Ag-Cr合金的耐磨性能是Cu-Ag合金的2～3倍.%By means of property tests, scanning electron microscopy (SEM), energy dispersive X-ray spectrum (EDS) and transmission electron microscopy, the electrotribological property and mechanism of Cu-Ag-Cr alloy were studied under electrical current, and compared with a Cu-Ag alloy. Wear tests were conducted with a specially designed sliding wear tester, and alloy wire was slid against a copper-based powder metallurgy strip under unlubricated conditions. The results show that the wear rate of Cu-Ag-Cr alloy increase with the increase in the sliding speed and the sliding distance. Adhesive wear, abrasive wear and electrical erosion wear are the dominant mechanisms under the electrical current sliding processes. Under the same conditions, the wear resistance of the Cu-Ag-Cr alloy is 2～3 times of the Cu-Ag alloy.