WC含量对铜基粉末冶金摩擦材料性能的影响

Effect of WC content on properties of Cu-based powder metallurgy friction materials

采用粉末冶金方法制备含WC的铜基粉末冶金摩擦材料,研究了WC含量对铜基粉末冶金摩擦材料的显微组织和性能的影响。结果表明:在WC质量分数小于4%时,铜基摩擦材料的孔隙率随WC含量的增加而降低,当WC质量分数超过4%后,其孔隙率随WC含量的增加而明显增大;随着WC含量的增加,铜基摩擦材料的密度基本保持不变;摩擦材料的硬度随着WC含量的增加而提高;WC的添加,改善了摩擦材料的摩擦性能,使其耐磨性随着WC含量的增加而提高,WC质量分数在4%时,铜基粉末冶金摩擦材料具有最优的摩擦性能。

Copper-based powder metallurgy friction materials containing WC were prepared by powder metallurgy method.The effect of WC content on microstructure and properties of copper-based powder metallurgy friction materials was studied.The results show that when the mass percent of WC is less than 4%,the porosity of copperbased friction material decreases with the increase of WC content,and when the mass percent of WC exceeds 4%,the porosity obviously increases with the increase of WC content.With the increase of WC content,the density of copper-based friction material basically remains unchanged.The hardness of friction material increases with the increase of WC content.The addition of WC improves the friction performance of the friction material and increases its wear resistance with the increase of WC content.When the mass percent of WC is 4%,the copper-based powder metallurgy friction material has the best friction performance.