Effect of Ti content on wear resistance of copper-based powder metallurgy friction materials
QIN Qun1，WANG Tian-guo1， HUA Jian-jie2
1. College of Materials Science and Engineering， Hubei University of Automotive Technology， Shiyan 442002， China 2. Dongfeng Powder Metallurgy Company of Dongfeng Motor Parts and Components Group Co.， Ltd.， Shiyan 442002， China
Abstract：Copper-based friction material was prepared by powder metallurgy method. The effect of Ti content on wear resistance of the material was investigated. The results demonstrate that， with the increase of titanium mass fraction from 3% to 12%， the relative density and the hardness of copper based friction material increase. The addition of titanium leads to lattice distortion and the hardness of the material increase. The friction coefficient decreases with increasing of friction velocities. The friction coefficient and the wear extent decrease with the increasing Ti content. The reason is that with the addition of Ti， the hardness of the material is increased， the strength of the surface micro convex body is increased， the degree of ploughing is reduced， the damage degree of the friction surface is reduced， and thus the wear resistance of the material is improved.
2017, Vol. 27 
