With copper-base PM( powder metallurgy)/QCr0. 5 couples as subject,the influence of surface roughness on friction and wear properties was studied under the electric-current condition with an HST-100 high speed and carry current friction and wear tester. The results show that the higher rough surface will result in the arcing more easily and form higher arc energy,the forms of wear are mainly abrasive wear and arc erosion. The higher smooth surface will result in longer arcing and higher arc energy, and lower friction coefficient, the forms of wear are mainly adhesive wear and arc erosion. There is an optimum surface roughness which will produce minimal arc energy and minimal wear rate.%以铜基粉末冶金/铬青铜摩擦副为对象,应用销盘式摩擦磨损模拟试验,研究载流条件下摩擦副的表面粗糙度对摩擦学特性的影响规律.结果表明:表面越粗糙,越易起弧,形成更高的电弧能量,磨损形式主要是磨粒磨损、电弧侵蚀;表面越光滑,燃弧时间越长,电弧能量越高,摩擦因数越低,磨损形式主要是黏着磨损、电弧侵蚀;表面粗糙度有一个最佳值,在这个表面粗糙度下电弧能量最小、质量磨损率也最小.
展开▼
