采用粉末冶金工艺分别制备含还原铁粉、泡沫纤维铁粉和铁合金粉的铜基摩擦材料,研究了铁粉种类对摩擦材料摩擦磨损性能的影响.当摩擦转速从3000 r·min-1提升至6200 r·min-1,用还原铁粉制备的样品,其摩擦因数随速度的升高出现严重衰退；含泡沫纤维铁粉的样品具有稳定的摩擦因数,试验范围内其波动值不超过0.024,但是磨损严重；采用铁镍合金粉制备的样品可有效减缓高速阶段摩擦因数的衰退,高速下摩擦因数波动低于0.027.以铁铬合金粉制备的样品,其磨耗随摩擦速度的增加几乎不发生变化,抗磨损能力最佳.
Copper-based friction materials were made by powder metallurgy ( P/M ) from copper powder and ferrous powder, which is reduced Fe powder, spongy Fe powder, Fe-Ni alloy powder and Fe-Cr alloy powder, respectively. Their friction and wear properties were investigated by friction testing, scanning electron microscopy and microhardness measurement. When the rubbing speed increases from 3000 to 6200 r·min-1 , the friction coefficient of specimens drops greatly. For specimens with spongy Fe powder, the friction coefficient changes less than 0.024, showing a stable friction coefficient but serious wear. When ferrous powder is strengthened by nickel, the friction coefficient stability of specimens at high rubbing speed improves obviously, and the friction coefficient changes less than 0.027. Specimens with Fe-Cr powder obtain the optimum wear resistance with almost constant wear rate as the rubbing speed increases.