石墨对风电机组用铜基摩擦材料组织及摩擦磨损性能的影响

Effect of Graphite on the Microstructure and Tribological Properties of Copper Matrix Friction Material Used in Wind Turbine

采用粉末冶金技术制备风电机组用铜基摩擦材料,借助扫描电镜及摩擦磨损试验机研究石墨的含量和石墨片尺寸对铜基摩擦材料组织和摩擦磨损性能的影响。结果表明:烧结组织中石墨呈条状且在垂直于压制压力的方向均匀分布;石墨可降低摩擦材料的摩擦因数,而摩擦表面形成的石墨润滑膜降低了材料的磨损;石墨片为300～600μm、石墨质量分数为15%的铜基粉末摩擦材料具有最佳的摩擦磨损性能。

A kind of copper matrix friction material used for wind turbine was prepared by powder metallurgy technolo- gy. The effect of graphite content and particle size on the microstructures and the properties of friction and wear of the ma- terials were investigated by SEM and friction wear testing machine. The results indicate that the graphite is uniformly dis- tributed by strip in the vertical direction of pressing pressure in the microstructure of material. The graphite has a good effect on reducing the friction coefficient and the lubricating film of graphite formed on the friction surface reduces the ma- terial wear during the friction. When the graphite particle size is 300 -600 μm and the weight content is 15% ,the sample has good friction and wear performance.