磁场干涉下锌黄铜自配副干摩擦学特性的研究

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The dry-sliding tribological characteristics and interfering mechanism of magnetic field of CuZn self-matched pairs were studied by use of improved MPV-1500 type friction and wear tester at room temperature. The results show that, with the magnetic field exerting and increasing, the rough- ness of friction surface increases and oxygen content of friction surface reduces; the main oxides are CuG40. Along with magnetic field intensity increasing, both wear rate of CuZn pins and average fric- tion coefficient of friction pairs has enlarging tendency, that is, magnetic field aggravates the friction and wear of CuZn. Additions to ferromagnetic materials on the back of diamagnetic materials can over- come the adverse effects of magnetic field on tribological properties. Each of selecting and matching of friction pairs materials, relative size of friction surface and magnetism of clamping device can affect the results of tribological examination.室温下采用改进的MPV-1500型摩擦试验机,研究锌黄铜自配副的磁场干摩擦学特性和磁场干涉机理。结果表明：磁场的施加和增大加剧了抗磁性锌黄铜的摩擦和磨损,增大了摩擦面的粗糙度,降低了摩擦面的氧元素含量,主要氧化物为Cu64O;随着磁场的增大,锌黄铜的磨损率和摩擦副的摩擦因数均有增大趋势,欲克服磁场对抗磁性锌黄铜干摩擦学特性的不利影响,可在其背面添置铁磁性材料;配副材料选配、对摩面的相对尺寸以及装卡装置的磁性均可影响实验研究结果。