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| Heat resistance and friction properties of copper-based friction materials with different graphite content |
| LI Yansen1，2，ZHANG Kun3，ZHANG Guohong4，XU Chengfa4，HU Zheng5，WANG Yinfeng5 |
| （1. Hebei Key Laboratory of Mechanics of Intelligent Materials and Structures，Shijiazhuang Tiedao University,
Shijiazhuang 050043， China; 2. Hebei Research Center of the Basic Discipline Engineering Mechanics，Shijia‐
zhuang Tiedao University, Shijiazhuang 050043， China; 3. Institute of Mechanics, Chinese Academy of Sciences,
100190, Beijing, China; 4. Hangzhou Advance Gearbox Group Co.，Ltd.，Hangzhou 311203，China; 5. China
North Vehicle Research Institute, Beijing 100072， China） |
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Abstract 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 proper‐
ties 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 agglomera‐
tion 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.
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Received: 13 October 2022
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Corresponding Authors:
张 坤（1986—），男，博士，副研究员，主要研究方向为粉末冶金材料。
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2023, Vol. 33 
