电弧能量对浸金属碳滑板材料载流摩擦磨损性能的影响  

Effects of Arc Discharge on Friction and Wear Properties of Metal-impregnated Carbon Strip Sliding against Cu Trolley under Electric Current

作　　者：胡道春[1] 孙乐民[1] 上官宝[1] 张永振[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《摩擦学学报》2009年第1期36-42,共7页Tribology

基　　金：国家973计划资助项目(2007CB607603);国家自然科学基金资助项目(50775066);河南省高校科技创新人才项目资助(2009HASTIT008);河南省创新团队项目资助

摘　　要：在销盘式高速载流摩擦磨损试验机上,通过正交试验考查了电弧能量对浸金属碳滑板材料载流摩擦磨损性能的影响;利用统计学相关系数理论和非线性回归分析,对电弧能量与摩擦系数、比磨损率进行定量比较分析,发现电弧能量与摩擦系数间存在一定的相关性,并与比磨损率间存在幂函数的关系;借助扫描电子显微镜、能谱分析仪和X射线衍射仪结合摩擦表面宏观温度的测量,分别对销试样电弧侵蚀后的表面膜微观结构、相组成及磨屑进行分析.结果表明:电弧能量严重影响摩擦副的载流摩擦磨损性能;电弧热效应使得局部接触表面温度超过熔点,浸渗金属熔融渗出摩擦表面,并使基体碳气化沉积于摩擦盘上,使得电弧侵蚀机理表现为材料转移和熔融喷溅.Influence of arc discharge on the contact strip on the pantograph of electric railway vehicles was studied. The experiments were carried out on an HST - 100 tribo - tester with metal - impregnated carbon strip under electric current, which simulated working conditions of the pantograph - wire system used in electric railway. Statistical correlation coefficient was applied to describe quantitatively the correlation between friction coefficient and arc discharge, and experiment data were processed through non - linear regression and orthogonal design. Regression equation between specific wear rate and arc discharge was obtained. Microstructure and phase composition were analyzed by SEM, EDS and XRD. Arc discharge dissipation seriously affected the tribological characteristics of the metal -impregnated carbon strip. Generation of electric arc heat was likely resulted in temperature of some local contact points beyond their melting point, and the main wear form was material transfer, melt and sputter erosion.

关 键 词：电弧能量 浸金属碳滑板 摩擦磨损性能 电弧侵蚀 

分 类 号：TH117.3[机械工程—机械设计及理论]