P60N型钢轨的地铁服役效果试验研究
向世雄1梁进学1薛晨红1周剑华2郑建国2
Experimental Study on P60N Model Rail Performance in Metro
XIANG ShixiongLIANG JinxueXUE ChenhongZHOU JianhuaZHENG Jianguo
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作者信息:1.1.武汉地铁运营有限公司， 430030， 武汉；
2.2.宝钢股份中央研究院(青山)， 430080， 武汉
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Affiliation:Wuhan Metro Operation Co., Ltd., 430030, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.12.026
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中图分类号/CLCN:U213.4
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栏目/Col:研究报告
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。
Abstracts:
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.
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