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采用MG-2000型销盘式高温磨损试验机对TC4合金在环境温度为200、400和600℃,载荷为50~250 N时的磨损性能进行了研究.利用SEM、EDS、XRD以及XPS等对试样磨面和剖面的形貌、成分及结构进行了观察与分析.结果表明:在不同的试验条件下,磨损表面均会形成一层不同于基材的摩擦层.摩擦层的成分及分布形态对TC4合金的磨损性能产生了重要的影响.在200和400℃时,摩擦层分布不均匀且不含或仅含少量的摩擦氧化物,这样的摩擦层对磨损表面不具有保护作用,TC4合金的磨损率随着温度的提高而提高.在600℃时,摩擦层分布均匀,且摩擦层含有较多的Ti O2和Ti O摩擦氧化物,TC4合金的磨损率大幅下降.因此,磨损过程中形成的均匀且含有大量摩擦氧化物的摩擦层极大地改善了TC4合金的磨损性能.
The wear properties of TC4 alloy at 200, 400 and 600 ℃ and load of 50 ~ 250 N were investigated by using MG-2000 pin-on-plate high temperature wear testing machine.The SEM, EDS, XRD and XPS The results show that under different test conditions, the worn surface will form a friction layer different from the substrate. The composition and distribution of the friction layer The morphology of TC4 alloy has an important effect on the wear properties.At 200 and 400 ℃, the tribological layer is unevenly distributed and contains little or no friction oxide, so the friction layer has no protective effect on the worn surface. TC4 The wear rate of the alloy increases with the increase of the temperature.At 600 ℃, the friction layer distributes evenly and the friction layer contains more Ti O2 and TiO friction oxide, the wear rate of the TC4 alloy decreases greatly.Therefore, the wear process The formation of a uniform friction layer containing a large amount of friction oxide greatly improves the wear properties of the TC4 alloy.