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车轮短时间的滑行会带来剧烈的摩擦磨损。为了研究大功率机车车轮材料耐滑动摩擦磨损性能,利用SRV摩擦磨损试验机对3种新型车轮材料J1、J2、J3进行室温及高温条件下的滑动摩擦磨损试验,通过三维白光干涉表面形貌仪对磨痕的三维形貌进行记录和测量,比较了3种材料的摩擦磨损特点和耐磨性能;测试了车轮材料的力学性能,利用显微硬度对摩擦表面进行分析,结合材料的化学成分和力学性能,讨论了3种新型车轮材料在不同温度条件下的摩擦磨损特点和机制。常温条件下,J1为磨粒磨损;J2以磨粒磨损为主,并有轻微疲劳磨损;J3为磨粒磨损、疲劳磨损共存;J2的耐磨性最好,J3次之,J1最差。高温条件下,3种车轮材料的摩擦磨损量差别不大,磨痕表面硬度很高的亮白相对其磨损机制有较大影响。
Short wheel skating will bring dramatic friction and wear. In order to study the sliding friction and wear properties of high-powered locomotive wheels, three kinds of new wheel materials J1, J2 and J3 were tested for sliding friction and wear under room temperature and high temperature conditions by SRV friction and wear testing machine. Three dimensional white light interference surface topography The three-dimensional morphology of the wear scar was recorded and measured. The friction and wear properties and wear resistance of the three kinds of materials were compared. The mechanical properties of the wheel material were tested. The micro-hardness was used to analyze the friction surface. Combining the chemical composition and Mechanical properties, discussed three kinds of new wheel materials under different temperature conditions of friction and wear characteristics and mechanisms. At room temperature, J1 is abrasive wear; J2 is mainly abrasive wear, with slight fatigue wear; J3 is abrasive wear, fatigue wear coexist; J2 wear resistance best, J3 second, J1 worst. Under high temperature conditions, the friction and wear of the three kinds of wheel materials are not significantly different, and the bright white surface with high abrasion marks has a greater impact on the wear mechanism.