直流稳恒磁场下高速钢/45~#钢环干滑动摩擦磨损特性研究

采用改进后的MPV-1500型摩擦磨损试验机,研究了常温下直流磁场对高速钢销/45#钢环摩擦副干滑动摩擦磨损特性的影响.结果表明:适当控制磁场强度可以降低磨损;磁场促进氧化,随着磁场强度增加,摩擦面生成的Fe2O3含量增加,磁场强度较大时,将有部分Fe3O4生成;载荷250 N,线滑动速度0.2 m/s下,随着磁场强度的增加,高速钢销试样的磨损量一直降低,45#钢环试样的磨损量、摩擦系数先降低后增加;磨损机制主要为氧化磨损和黏着磨损.

Dry Sliding Friction and Wear of High-speed Steel/45 Steel tribo-pair under Direct Current Steady Magnetic Field

The dry sliding friction and wear of high-speed steel/45# steel tribo-pairs were studied on a modified MPV-1500 tribo-tester at room temperature under direct current steady magnetic field. The results showed that reduced wear can be obtained at certain magnetic field intensities. The presence of magnetic field enhanced the oxidation of steels and increased the concentration of Fe2O3 on the worn surface, as the magnetic field intensity increased. The presence of Fe3O4 on the worn surface can be observed as the magnetic field strength was high enough. At a load of 250 N and a linear speed of 0.2 m/s, increasing the magnetic field intensity reduced wear of high-speed steel pin. The average friction coefficient and wear of 45# steel ring first decreased and then increased. The wear mechanisms involved were oxidation wear and adhesive wear.