油润滑条件下弹性金属塑料复合材料的摩擦磨损特性研究

在MPA－2000型盘销式摩擦磨损试验机上评价了油润滑条件下弹性金属塑料复合材料与钢对摩时的摩擦学特性，用扫描电子显微镜观察试样磨损表面形貌并分析其摩损机理，并在试验基础上建立了弹性金属塑料材料与钢对摩时的等摩损率图。结果表明：在低载荷条件下摩擦系数较高，随着载荷数升高摩擦系数降低；当滑动速度小于3．52m/s时，摩擦系数基于稳定在0．030；弹性金属塑料材料的磨损率随滑动速度和载葆的升高而增加，结合等磨损率图分析发现，当载荷小于1515N而滑动速度小于3．52m/s时，弹性金属塑料复合材料的磨损率相对较低；当滑动速度泪地3．52m/s时，弹性金属材料的磨损机理以微切削、挤压变形和犁沟磨损为主，在摩擦副两表面形成转移－依附物；当滑动速度为5．24m/s时，弹性金属塑料材料的磨损以表层软化和熔融为主要特征，所建立的等磨损率图对弹性金属塑料材料的使用有一定的指导作用。

Study on the Tribological Properties of Elastic-Metallic-Plastic Composite under Oil Lubrication Condition

The tribological properties of elastic metallic plastic (EMP) composite rubbing against steel under oil lubrication were investigated on a pin on disc friction and wear test rig, and their worn surfaces were examined with a scanning electron microscope. It has been found that the friction coefficients are relatively high at low load and decrease with the increase of load, then stabilize around 0.03 at a sliding speed below 3.52m/s. The wear rate of EMP increases with the increase of velocity and load at a different pace under various test conditions. By analyzing the isogram of wear rate for EMP steel pair, it was found that a lower wear rate of EMP was registered at a load below 1515N and a sliding speed below 3.50m/s. Observation of the worn surfaces of both the EMP composites and the counterpart steel by scanning electron microscope indicates that the wear of the EMP composites is characterized by micro cutting, extruding deformation and ploughing at a sliding speed below 3.52m/s, and a transfer film is formed on the counterpart steel surface. The wear of the EMP composites at a sliding speed 5.24m/s is characterized by surface softening and melting.