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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25~600℃、载荷为50~250 N时的磨损性能进行了研究。利用SEM、EDS和XRD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。实验结果表明,在25~300℃,TC4合金的磨损率随着温度的升高而升高。磨面呈犁沟及黏着痕迹,磨损机制为黏着磨损和磨粒磨损。在400℃时,磨面局部被摩擦氧化层所覆盖,磨损率随着载荷的增加缓慢下降,磨损机制为黏着磨损、磨粒磨损和氧化磨损。在500~600℃,磨面大部分被摩擦氧化层所覆盖,磨损率很低且随载荷变化很小,磨损机制为氧化磨损。可见,TC4合金在500~600℃具有优异的耐磨性能。
The wear properties of TC4 alloy at 25 ~ 600 ℃ and 50 ~ 250 N load were studied by MG-2000 pin-plate high temperature wear tester. SEM, EDS and XRD were used to observe and analyze the morphology, composition and structure of the sample surface and section. The experimental results show that the wear rate of TC4 alloy increases with the increase of temperature at 25 ~ 300 ℃. Surface was furrow furrow and adhesion marks, wear mechanism for the adhesive wear and abrasive wear. At 400 ℃, the wear surface is partially covered by friction oxide layer, and the wear rate decreases slowly with the increase of load. The wear mechanism is adhesive wear, abrasive wear and oxidation wear. At 500 ~ 600 ℃, the grinding surface is mostly covered by the friction oxide layer, the wear rate is very low and changes little with the load, the wear mechanism is oxidation wear. Can be seen, TC4 alloy at 500 ~ 600 ℃ has excellent wear resistance.