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研究了超声原位制备的Al3Ti/7075铝基复合材料在不同载荷和滑动摩擦速度下的干摩擦磨损性能。采用SEM对磨损面和磨屑显微组织进行观察与分析,讨论了不同载荷下材料的磨损机制。结果表明:基体和复合材料磨损质量损失随着滑动摩擦速度和载荷的增加而增加。基体和复合材料都是从轻微磨损向严重磨损转化。当载荷为10～30N时,基体和复合材料表现为擦伤磨损的特征;当载荷为120N时,基体和复合材料表现为剥层磨损的特征,基体的磨损质量损失与铝基复合材料相比尤为严重;在此条件下,复合材料与基体相比磨损性能增加了14.6%～18%。
The dry friction and wear properties of Al3Ti / 7075 aluminum matrix composites prepared by ultrasonic in situ were studied under different loads and sliding velocities. The microstructure of wear surface and wear debris were observed and analyzed by SEM, and the wear mechanism of the material under different load was discussed. The results show that the wear mass loss of matrix and composite increases with the increase of sliding friction speed and load. Substrates and composites are all transformed from slight abrasion to severe abrasion. When the load is 10 ~ 30N, the matrix and the composite show the characteristic of abrasion and abrasion. When the load is 120N, the matrix and the composite show the characteristic of peeling abrasion. The wear loss of the matrix is lower than that of the aluminum matrix composite Especially in this condition. Compared with the matrix, the wear resistance of the composites increased by 14.6% ~ 18%.