【摘要】 针对服役条件对材料载流摩擦性能的重要影响及摩擦磨损的不均匀,采用铜-石墨复合材料与QCr0.5配副,研究了相对滑动速度对载流摩擦性能的影响。结果表明:随着相对滑动速度增加,铜-石墨复合材料的摩擦因数平均值略有增加,波动增加。磨损率先略有增加,速度超过30 m/s后急剧增加。磨损面分为机械磨损区和电弧侵蚀区,机械磨损以犁沟和碾压塑性变形为主,电弧侵蚀以熔融为主。电弧侵蚀区主要分布在磨损面尾部靠近边缘位置,且随速度增加,电弧侵蚀面积增加,电弧侵蚀使磨损表面严重粗糙化。更多还原

【Abstract】 In view of the important influence of service conditions on the current-carrying friction properties of materials and the uneven friction and wear,the copper-graphite composite material and QCr0.5 pairing were used to study the influence of the relative sliding speed on the current-carrying friction properties. The results show that as the relative sliding speed increases,the friction coefficient average value of the copper-graphite composites increases slightly,and the fluctuation increases. The wear rate increases slightly first, and increases sharply after the speed exceeds 30 m/s. The wear surface can be divided into the mechanical wear area and the arc erosion area. The main wear forms of the mechanical wear are furrow and rolling plastic deformation,and the main erosion form of the arc erosion is melting. The arc erosion area is mainly distributed at the tail of the wear surface near the edge,and increases with the increase of speed. Arc erosion severely roughens the worn surface.更多还原