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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.
The effects of iron powder on the friction and wear properties of the friction materials were studied by using the powder metallurgy process to prepare copper-based friction materials containing reduced iron powder, foamed fiber iron powder and iron alloy powder, respectively. When the friction speed increased from 3000 r · min-1 to 6200 r · min-1, the friction coefficient of the sample prepared with reduced iron powder showed a serious decline with the increase of the velocity; the sample containing the foam fiber iron powder had a stable friction coefficient, the fluctuation value within the experimental range did not exceed 0.024, But the wear is serious.The sample prepared by using Fe-Ni alloy powder can effectively reduce the decline of friction coefficient in high-speed stage, and the friction coefficient fluctuates below 0.027 at high speed.The wear of sample prepared with Fe-Cr alloy powder almost does not occur with the increase of friction speed Change, best wear resistance.