速度对铜基粉末冶金 / 铬青铜摩擦副载流特性的影响
Effect of Velocity on Current-carrying Behavior of Cu-based Powder Metallurgy / QCr0.5 Couples Under Electric Current
赵燕霞, 刘敬超, 孙乐民, 上官宝
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作者单位：河南科技大学 材料科学与工程学院, 河南 洛阳 471003
中文关键字：铜基粉末冶金/铬青铜摩擦副； 载流质量； 电弧能量
英文关键字：Cu-base powder metallurgy / QCr0.5 couples; carrying-current quality; arc energy
中文摘要：在自制的销-盘式载流摩擦磨损试验机上，对铜基粉末冶金/铬青铜摩擦副载流特性进行了研究。结果表明，离线率随速度的增大近乎呈线性增大；滑动速度较高时，载流效率迅速降低，载流稳定性升高，载流质量急剧下降；载流效率、载流稳定性与电弧能量的大小密切相关，电弧能量越大，载流质量越差。
英文摘要：The current-carrying behavior of Cu-based powder metallurgy / QCr0.5 couples under electric current was investigated by self-made friction wear testing machine. The experimental results show that the off-line rate almost increases linearly with the increase of velocity. At low velocity, the carrying-current quality declines, the current-carrying efficiency quickly drops and current-carrying stability rises. The current-carrying efficiency and current-carrying stability are closely related to the arc energy. The higher the arc energy, the worse the carrying-current quality.