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研究在油润滑状态下摩擦速度和加载载荷对时效态Al-Sn-Cu合金摩擦磨损性能的影响。结果表明:由于峰时效合金较欠时效和过时效合金具有最佳的强度-塑性配比和更高的硬度,因此峰时效合金表现出最优的摩擦磨损性能。摩擦速度和加载载荷对合金磨损率和摩擦因数具有显著影响。随着摩擦速度的增大,磨损表面的润滑膜和Sn相更为均匀,合金的磨损率和摩擦因数均降低;然而随着加载载荷的增加,均匀的润滑膜和Sn相被严重破坏,合金磨损率急剧上升。Sn相和包括中间润滑层、摩擦氧化层的润滑膜是影响Al-Sn-Cu合金摩擦磨损性能的决定性因素。
The effects of friction speed and load on the friction and wear properties of aged Al-Sn-Cu alloys were investigated. The results show that the peak-aged alloys show the best friction and wear properties because the peak-aged alloys have the best strength-plastic ratio and higher hardness than the less-aged and the overaged ones. The friction speed and loading load have a significant effect on the wear rate and friction coefficient of the alloy. With the increase of friction speed, the lubricating film and Sn phase on the worn surface are more uniform, and the wear rate and friction coefficient of the alloy decrease. However, with the increase of loading load, the uniform lubricating film and Sn phase are severely damaged. Abrasion rate rose sharply. The Sn phase and the lubricating film including the intermediate lubricating layer and the frictional oxide layer are the decisive factors that affect the tribological properties of the Al-Sn-Cu alloy.