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在载流高速摩擦磨损试验机上进行试验,研究了不同电流和速度对铜-石墨复合材料摩擦系数和磨损率的影响,并对摩擦表面的形貌进行了观察和分析。结果表明:电流、速度是影响铜-石墨复合材料载流摩擦磨损性能的重要因素。在速度一定的条件下,随着电流增大,铜-石墨复合材料的摩擦系数减小,磨损率增大;在电流一定的条件下,材料的摩擦系数随速度的增大先升高后降低,磨损率随速度的增大先升高后降低,然后迅速增大,在速度为40 m/s时,材料的磨损机制出现了明显的变化。
The effect of different current and velocity on the friction coefficient and wear rate of copper-graphite composites was studied on a high-current-carrying friction and wear tester. The morphology of the friction surface was observed and analyzed. The results show that the current and velocity are important factors affecting the tribological properties of copper-graphite composites. Under certain conditions of speed, the friction coefficient of copper-graphite composite decreases and the wear rate increases with the increase of current. Under certain current conditions, the friction coefficient of the material first increases and then decreases with the increase of the velocity , The wear rate increases first and then decreases with the increase of velocity, then increases rapidly. At a velocity of 40 m / s, the wear mechanism of the material changes obviously.