铜基粉末冶金摩擦材料高温摩擦疲劳性能测试

Frictional fatigue property test of copper based powder metallurgy frictional material at high temperature

在高温摩擦疲劳试验机上对铜基粉末冶金材料进行了性能测试。发现 :(1)在 10 0℃～ 3 5 0℃区间 ,随温度的升高 ,摩擦因数在降低 ;(2 )在 5 0 0℃时 ,摩擦因数最高 ,且发生了粘着磨损 ;(3 )在 45 0N ,3 0 0℃时 ,磨痕表面出现了球状的石墨颗粒层 ,这起到了极好的润滑作用 ,使得 3 0 0℃时 ,磨损较低。

Property test of copper based powder metallurgy material was carried out on high temperature frictional fatigue-testing machine. It has been discovered that (1) in the region between 100 ℃～350 ℃ the friction coefficient is lowering along with the rising of temperature; (2) the friction coefficient is the highest at the temperature of 500 ℃, and adhesive wear occurred; (3) the global graphite grain layer appeared at the surface of wear scar at 450 N and 300 ℃, and played an extremely good effect of lubrication, thus makes a fairly lower wear at the temperature of 300 ℃.