TC4合金在不同温度下的摩擦磨损行为研究

Research on Wear Behavior of TC4 Alloy at Different Temperatures

采用Si C球作为对磨材料,研究了在不同温度下TC4合金的摩擦磨损性能及磨损表面的组织变化。结果表明:TC4合金的磨损率随温度的升高而降低;平均摩擦系数在200℃内变化不明显,但当温度增加至400℃时,平均摩擦系数明显增加,且在高温下,摩擦系数随时间的变化存在明显的波动;随温度升高,TC4合金的磨损机理从以犁削磨损为主逐渐向以黏着磨损和氧化磨损为主转变。

The wear properties and microstructure changes of wear surface of TC4 alloy were studied by using Si C grinding ball as counterpart. The results show that the wear rate of the alloy decreases with the temperature increasing. The average friction coefficient did not change obviously below 200 ℃, while increases drastically at 400 ℃. Furthermore, there is obvious fluctuation of the friction coefficient when wearing against the counterpart is at high temperature. With increasing the temperature, the wear mechanisms of the alloy convert gradually from predominant grinding abrasion into predominant adhesion and oxidation abrasion.