不同石墨含量铜基摩擦材料耐热特性及摩擦性能研究  

Heat resistance and friction properties of copper-based friction materials with different graphite content

作　　者：李炎森 张坤[3] 张国洪[4] 许成法[4] 胡铮[5] 汪银风 LI Yansen;ZHANG Kun;ZHANG Guohong;XU Chengfa;HU Zheng;WANG Yinfeng(Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Research Center of the Basic Discipline Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Institute of Mechanics,Chinese Academy of Sciences,100190,Beijing,China;Hangzhou Advance Gearbox Group Co.,Ltd.,Hangzhou 311203,China;China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]石家庄铁道大学,河北省智能材料结构力学重点实验室,河北石家庄050043 [2]石家庄铁道大学,河北省工程力学基础学科研究中心,河北石家庄050043 [3]中国科学院力学研究所,北京100190 [4]杭州前进齿轮箱集团股份有限公司,浙江杭州311203 [5]中国北方车辆研究所,北京100072

出　　处：《粉末冶金工业》2023年第6期68-73,共6页Powder Metallurgy Industry

基　　金：国家国防科技工业局基础创新项目(237099000000170004);河北省自然科学基金重点项目(基础研究基地项目)(A2023210064)。

摘　　要：针对铜基摩擦材料耐热性能不足导致的摩擦片服役寿命受限这一问题,采用粉末冶金方法压烧了3种不同质量分数石墨的摩擦材料试样,主要研究了石墨含量对材料耐热性能及摩擦磨损性能的影响及其作用机制。表面形貌分析表明,随着石墨含量的增加基体连续性先增加后降低;热分析结果表明,石墨含量对热学性能的主要影响在于因石墨过量产生的团聚现象导致的界面传热下降;摩擦磨损试验结果证实,随着石墨含量的增加,试样耐热性能明显提升,材料基体的强度得到增强,但是却导致试样磨损率及动摩擦因数上升。Aiming at the problem of limited service life of friction discs caused by insufficient heat resistance of copper-based friction materials, three kinds of friction materials with different mass fractions of graphite were prepared by powder metallurgy, the effects of graphite content on the heat resistance and friction, wear properties were investigated. The surface morphology analysis shows that the continuity of the matrix increases and then decreases with the increase of graphite content. The thermal analysis results show that the main effect of graphite content on the thermal properties lies in the decrease of interfacial heat transfer due to the agglomeration phenomenon generated by the excess of graphite. The results of friction and wear tests confirm that with the increase of graphite content, the heat resistance of the specimen increases significantly and the strength of the material matrix is enhanced, but this leads to an increase in the wear rate and dynamic friction coefficient of the specimen.

关 键 词：铜基摩擦材料 石墨 能量负荷许用值 磨损率 动摩擦因数 

分 类 号：TF125.9[冶金工程—粉末冶金]