T6态Al-20Si-5Cu合金干滑动摩擦磨损特性研究

Dry Sliding Friction Wear Characteristics of T6 Treated Al-20Si-5Cu Alloy

摘要:

以T6态Al-20Si-5Cu合金为研究对象，采用UMT-2型摩擦磨损试验机研究材料的摩擦磨损性能，并用SEM、EDS、奥林巴斯激光共焦扫描显微镜OLS4000分析材料的常温摩擦磨损行为。结果表明：Al-20Si-5Cu合金的磨损率随着附加载荷的增加而增大，但在高载荷下磨损率仍然很小，表现出了良好的耐磨性；摩擦系数平均值在0.38~0.42范围内变化，且在磨损过程中随时间的变化不大，表现出了较强的稳定性；同时，随着载荷的增大，材料的磨损机制发生改变，由低载荷的氧化磨损、磨粒磨损转变为疲劳磨损。

Abstract:

The dry sliding friction wear test of T6 treated Al-20Si-5Cu alloy was performed with UMT-2 tribometer. The wear mechanisms of the alloy were analyzed by means of SEM, EDS and OLS4000. The results reveal that the wear rate of Al-20Si-5Cu alloy is increased with the increase of applied load, but under high applied load, the wear rate is still small, showing a good wear resistance of the materials. The average friction coefficient changes within the range from 0.38 to 0.42, and the change is small over time, which indicates a strong stability. Meanwhile, as the applied load increases, the wear mechanism is changed from the oxidative wear and abrasive wear of low applied load to the fatigue wear.