P60N型钢轨的地铁服役效果试验研究  

Experimental Study on P60N Model Rail Performance in Metro

作　　者：向世雄 梁进学 薛晨红 周剑华 郑建国 XIANG Shixiong;LIANG Jinxue;XUE Chenhong;ZHOU Jianhua;ZHENG Jianguo(Wuhan Metro Operation Co.,Ltd.,430030,Wuhan,China;不详)

机构地区：[1]武汉地铁运营有限公司,武汉430030 [2]宝钢股份中央研究院(青山),武汉430080

出　　处：《城市轨道交通研究》2022年第12期143-147,共5页Urban Mass Transit

摘　　要：针对武汉地铁钢轨伤损现状,开展了在地铁运行环境下P60N型钢轨对轮轨接触关系及轨面状态改善的实践研究。跟踪观测了武汉地铁2号线小半径曲线P60N型钢轨和3号线仿形打磨成的P60N型钢轨服役周期内的状态。数据表明:相较于P60型钢轨,P60N型钢轨的轮轨接触面光洁、无剥离掉块伤损、光带分布合理、磨耗速率较小,达到了预期的效果。建议新建地铁线路或大修换轨施工中推广采用P60N型钢轨,以延长钢轨的服役年限、降低维护成本。In view of the rail damage situation in Wuhan Metro,a practice study is carried out on the improvement of P60N model rail for wheel-rail contact relationship and rail surface state while in service.The states of Wuhan Metro Line 2 small-radius curve P60N rails and Line 3 profile-grinded P60N rails in service are tracked and observed.Results show that compared to P60 rail,the P60N rail has smooth wheel-rail contact surface,no spalling defects,reasonable light bands distribution and smaller wear rate,achieving the expected performance.It is suggested that P60N rail should be widely adopted in newly built metro lines or in overhaul and replacement construction,in order to prolong the rail service lifespan and reduce the maintenance cost.

关 键 词：P60N型钢轨 轮轨关系 接触疲劳 钢轨磨耗 

分 类 号：U213.4[交通运输工程—道路与铁道工程]