滑移速度对铜石墨滑板材料摩擦性能的影响

为研究铜石墨滑板材料在不同滑移速度下的摩擦性能,从摩擦机理角度建立了滑板材料摩擦性能与滑移速度关系的理论模型,假定材料摩擦性能和滑移速度之间存在抛物线型关系,即存在一个最佳滑移速度区域,当滑移速度接近或处于此区域时,摩擦接触面石墨层的形成量和消耗量趋于平衡,材料表面形成了完整的石墨层,铜石墨滑板材料具有稳定的摩擦性能.在不同滑移速度下进行摩擦实验,采用扫描电镜分析磨损表面形貌,结果证明了理论模型的正确性.

Influence of sliding velocity on friction properties of copper-graphite slide plate materials

In order to research the friction properties of copper-graphite slide plate materials(CGSPMs) at different sliding velocities,a theoretical model on the relationship between sliding velocity and wear behaviors of CGSPMs was established from the perspective of friction mechanism.Theoretical analyses indicate that there is a parabola-shaped relationship between friction properties and sliding velocity.It means that an optimum sliding velocity region exists.When sliding velocity approaches to or is in this region,the forming and wearing rates of graphite layer on the worn surface tend to be balanced.consequently,a relatively integrated graphite layer forms on the contact surface and the CGSPMs possess stable friction properties.The theoretical model is well verified by the friction experiments conducted at different sliding velocities and scanning electron microscopy(SEM) analysis results about certain special worn regions.