【摘要】 采用粉末冶金方法制备含短炭纤维的湿式铜基摩擦材料,研究炭纤维含量对湿式摩擦材料的摩擦磨损性能和力学性能的影响,以及制动条件对动摩擦因数的影响。结果表明:随着炭纤维含量及材料的孔隙率增加、硬度及密度均降低,摩擦因数呈先增加后减小的变化趋势,磨损量呈先减小后增大的趋势。炭纤维含量为(质量分数)1%时材料的摩擦磨损性能最好,摩擦因数最大且最稳定,磨损量最小。材料摩擦因数随着载荷增大而增大,随炭纤维含量增加磨损率呈先减小后增大的趋势。炭纤维的加入提高了材料的能量许用值。更多还原

【Abstract】 The wet copper-based friction material containing carbon fiber was prepared by using powder metallurgy technology.The effect of the fiber content on tribological and mechanical properties of the materials have been tested,and the effects of brake conditions on friction coefficient of the material have also been investigated.The results indicate that the hardness and the density decrease with the increasing of the materials porosity and mass fraction of carbon fiber.The trend of the friction coefficient of the friction material increases firstly and then decreases,while the change of wear rate of the material is opposite to friction coefficient.As the carbon fiber addition in the friction material is about 1%,the material possesses the optimal friction coefficient and minimum wear.While the friction coefficient of material increases with the increasing of loading and the wear rate decreases firstly and then increases with the increasing of carbon fibre comtent.In addition,the carbon fiber adding can improve the allowable energy absorb.更多还原