磁场条件下钢轨材料的摩擦磨损性能试验研究

摘要

Based on HSR-2M high-speed reciprocating friction and wear tester,the effect of normal force,reciprocating velocity and other parameter on friction and wear properties of steel rail materials were studied.By analyzing wear scar morphology,the wear mechanism was studied and the results with and without magnetic field were compared.The results show that the magnetic field can reduce the friction ceefficient and wear rate of steel rail materials.With the increasing of sliding velocity,the friction coefficient and wear rate of steel rail materials are reduced.With the increasing of normal force,the friction coefficient of steel rail materials is reduced,but the wear rate is increased.Magnetic field can improve the friction and wear properties of steel rail materials.Without magnetic field,the wear of steel rail materials is typical abrasive wear,the worn surface has obvious furrows,and the wear tests have larger wear rate and friction coefficient.When a magnetic field is applied,the wear mechanism is mainly adhesive wear,and the friction coefficient and the wear rate are small.%基于HSR-2M高速往复摩擦磨损试验机,试验研究在永磁体磁场条件下,法向载荷、往复速度等参数对钢轨材料摩擦性能的影响,通过磨痕形貌分析其磨损机制,并与无磁场条件下的结果进行对比.试验结果表明:磁场的引入可以在一定程度上减小钢轨材料的摩擦因数、磨损率;增大滑动速度对摩擦因数和磨损率均有减小作用,增大载荷能够降低摩擦因数,但磨损率增加;磁场能够提高钢轨材料在摩擦过程中的磨损性能.无磁场时,钢轨材料磨损形式为典型的磨粒磨损,摩擦系统的磨损率和摩擦因数较大;有磁场时,磨损形式主要为黏着磨损,摩擦因数和磨损率较小.