铜基粉末冶金摩擦材料的湿式摩擦性能  

Wet friction properties of copper-based material via powder metallurgy

作　　者：王秀飞[1] 黄启忠[1] 尹彩流[2] 谭瑞轩[1] 宁克焱[3] 吴才成[3] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]广西民族大学物理与电子工程学院,广西南宁530006 [3]中国北方车辆研究所车辆传动国家重点实验室,北京100072

出　　处：《中南大学学报（自然科学版）》2008年第3期517-521,共5页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展计划资助项目(2006CB600901);车辆传动国家重点实验室基金资助项目(51457030105QT7106)

摘　　要：采用粉末冶金方法制备铜基湿式摩擦材料,利用金相技术分析材料表面的微观结构,并用MM-1000摩擦试验机研究制动条件对动摩擦因数影响的变化规律。研究结果表明:添加短切炭纤维增强的材料能有效提高材料的能量许用负荷和摩擦因数;摩擦副的制动速度为1 500 r/min和2 500 r/min时,摩擦因数随制动压力的增加而减小;摩擦副的制动速度为3 500 r/min时,摩擦因数随制动压力的增大呈现先降低而后增大的趋势;当制动压力为1.0 MPa和1.5 MPa时,摩擦因数随制动速度的提高而缓慢减小;当制动压力为2.0 MPa和2.5 MPa时,摩擦因数随制动速度的增加呈现先减小而后急剧增大的趋势。A kind of wet copper-based friction material was made through powder metallurgy process. The surface microstructure was analyzed through metallographic analysis. The effects of brake conditions on friction coefficients of the material were investigated with MM-1000 friction tester. The results show that chopped carbon fibers can efficiently enhance energy load permitting value and friction coefficient. When the brake velocities are 1 500 r/min and 2 500 r/min, respectively, the friction coefficients decrease with the increase of interface pressure. When keeping brake velocity is 3 500 r/min, the dynamic friotion coefficient first decreases and then increases with the increase of the brake pressure. With the increase of brake velocity, the friction coefficients with interface pressure as 1.0 MPa and 1.5 MPa slowly decrease. When the brake pressures are 2.0 MPa and 2.5 MPa, respectively, the dynamic friction coefficient first decreases and then sharply increases with the increase of brake velocity.

关 键 词：粉末冶金 湿式摩擦材料 铜基 短切炭纤维 摩擦性能 

分 类 号：TF125.9[冶金工程—粉末冶金]