摘要
在载流高速摩擦磨损试验机上进行试验,研究了不同电流和速度对铜-石墨复合材料摩擦系数和磨损率的影响,并对摩擦表面的形貌进行了观察和分析。结果表明:电流、速度是影响铜-石墨复合材料载流摩擦磨损性能的重要因素。在速度一定的条件下,随着电流增大,铜-石墨复合材料的摩擦系数减小,磨损率增大;在电流一定的条件下,材料的摩擦系数随速度的增大先升高后降低,磨损率随速度的增大先升高后降低,然后迅速增大,在速度为40 m/s时,材料的磨损机制出现了明显的变化。
The influence of electrical current and velocity on friction coefficient and wear rate of copper-graphite composites for electric locomotive were researched on a high-speed friction and wear tester,the morphology of worn surface were observed and analyzed.The results show that the friction coefficient reduces and wear rate rises with the increase of electrical current at the same velocity.At the same current,the friction coefficient rises at the beginning and reduces later along with the increase of velocity.The wear rate rises at first and decreases later.When the velocity is more than 40 m/s,the wear rate rapidly increases with the increase of velocity,and the wear mechanism of the material changes obviously.
出处
《铸造技术》
CAS
北大核心
2016年第7期1338-1341,共4页
Foundry Technology
基金
郑州市有机光电材料重点实验室资助项目
关键词
铜-石墨复合材料
电流
速度
摩擦系数
磨损率
copper-graphite composites
current
velocity
friction coefficient
wear rate
