铜基粉末冶金列车闸瓦材料的摩擦磨损性能研究  

Study on Friction Wear Property of Train Brake Materials by Copper-based Powder Metallurgy

作　　者：高红霞[1] 刘建秀[1] 朱茹敏[1] 

机构地区：[1]郑州轻工业学院机电工程学院,河南郑州450002

出　　处：《材料科学与工程学报》2005年第6期871-874,共4页Journal of Materials Science and Engineering

基　　金：中国工程物理研究院基金资助项目(421010201);河南省重大科技攻关资助项目(03230239000)

摘　　要：在MM-1000型摩擦试验机上测试了铜基粉末冶金列车闸瓦材料在不同制动条件下的摩擦磨损性能.试验证明:该材料具有较高的摩擦系数0.43～O.46,但超过一定制动速度时摩擦系数迅速下降,材料磨损量在制动速度为3000r/min时最小,低速和高速制动时磨损量相对较大;制动速度一定时,随制动压力增大,材料的摩擦系数减小,压力增大到一定值时摩擦系数趋于稳定,制动压力对材料磨损量的影响较小;该材料低速制动下的磨损机理主要为疲劳磨损,高速制动时主要为磨粒磨损和氧化磨损.The experiment is conducted on MM-1000 friction test machine, which tests friction wear property of copper-based train brake materials by powder metallurgy at different brake condition. It shows that the material has a higher coefficient of friction with 0.43-0.46, but when surpassed a certain brake speed, the friction coefficient decreased rapidly. When the brake speed is 3000r/min, the material＇ s wear volume is in its minimum, how higher or lower the brake speed is the wear volume is bigger relatively. When the brake speed is fixed, the friction coefficient of the materials is reductive with the increase in brake pressure, and when the brake pressure increased to a certain extent, the friction coefficient trend to a fixed volume. The effect of brake pressure to material＇s wear volume is comparatively small. In lowly brake speed it mainly refers to fatigue wear, while in highly brake speed it mainly refers to abrasive and oxidation wear.

关 键 词：列车闸瓦 摩擦性能 粉末冶金 铜基 制动速度 制动压力 

分 类 号：TB333[一般工业技术—材料科学与工程]