Friction and wear properties of PM Zn-W alloy reinforcing copper-based friction material for mining truck clutches
XIE Maoqing1,2, WANG Leigang1, PENG Peng3, YANG Guosheng3, ZHANG Jiahao4
1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; 2. Zhejiang Tieliu Clutch Co., Ltd., Hangzhou 311101, China; 3. Nantong Wanda Friction Material Co., Ltd., Nantong 226611, China; 4. School of electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, China
Abstract：The copper baseed friction materials for mine truck clutch were prepared by adding Zn-W alloy into the existing copper base powder metallurgy friction material formulation, with different Zn-W alloy content and different pressing density. The microstructure and friction and wear properties of the materials were analyzed and tested, and the incremental energy/power level test and bench test were carried out. The results show that the surface hardness of Cu based friction materials decreases with the increase of Zn-W alloy content and increases with the increase of density. The friction coefficient increases with the increase of Zn-W alloy content and decreases with the increase of density. The copper based friction plate with mass fraction of 6%Zn-W alloy and 10% higher density has suitable surface hardness, dynamic/static friction coefficient and good wear resistance, and can reduce the noise, vibration and acoustic vibration roughness of automobile. Compared with the friction plate without Zn-W alloy, the energy output of the friction plate can be increased by two levels, and the sixth level energy output (753.16 J/cm2) can be sustained. The main performance of the friction plate is slightly higher than that of the imported copper based friction plate.
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2020, Vol. 25 
