|
|
Effect of mixing time on properties of graphite-containing copper-based friction materials magnet |
LIU Jian-xiu,HAO Yuan-feng,FAN Jiang-lei,PAN Sheng-li |
School of Mechancial and Electrical Engineering,Zhengzhou University of Light Industry, Zhengzhou 450002,China |
|
|
Abstract In this paper,copper-based friction materials were prepared by powder metallurgy method. The effect of mixing time on the properties of graphite-containing copper-based friction materials was studied by means of Brinell hardness tester,friction and wear tester and scanning electron microscope. The results show that with the increase of mixing time,the distribution of graphite in sintered friction materials becomes more uniform,the continuity of Cu matrix decreases, the density and hardness of materials decrease,the friction coefficient of materials increases first and then decreases, the wear loss decreases first and then increases. After addition of graphite,the sintered sample mixed for 8 h has the best friction and wear resistance properties.(Compared with other samples,the friction coefficient is increased by about 10%,the wear loss is reduced by about 30%)
|
Received: 04 March 2019
|
|
|
|
|
|
|