硼铁含量和粒度对铁铜基摩擦材料性能的影响

研究了硼铁含量和粒度对铁铜基摩擦材料性能的影响。研究发现, 当硼铁粒度为0.250～0.075 mm时, 若硼铁含量在0～10%范围内变化, 则摩擦系数随硼铁含量的增加而增加。在制动压力为0.6 MPa 时, 摩擦材料的磨损随硼铁的增加而有所下降;当压力增加到1.1MPa 时, 材料的磨损随硼铁的增加而增加。当硼铁含量为2.5%时, 摩擦系数和材料磨损量随细粒度0.048～0.028 mm 硼铁的增加而下降。研究还发现, 摩擦材料中的硼铁(FeB)在烧结过程中与Fe 反应形成了Fe₂B, Fe₂B 的生成既可提高摩擦系数又可降低材料磨损。

Effects of Total Amount and Grain Size of FeB on Properties of Fe-Cu Based Frictional Materials

The effects of the total amount and grain size of FeB on properties of Fe-Cu based frictional materals were studied. The results show that when the grain size of FeB was in 0.250～0.075mm and the content of FeB increased from 0 %to 10 % mass, the frictional coefficient always increases, the wear of frictional materals at the brake pressure of 0.6MPa decreases and inereases at the brake pressure of 1.1MPa.When the amount of FeB was 2.5 %mass fraction, both the frictional coefficient and wear drop with the rise of the fine grain from 0.048 mm to 0.028 mm of FeB.It was also found that the FeB reacts with Fe in frictional materals to produce Fe₂B during sintering, and this Fe₂B leads to increasing frictional coefficient and decreasing wear of the frictional materals.