摘要
某城际高速铁路开通运营仅约半年,使用的U71MnG 60kg/m热轧钢轨在某车站列车进站端的半径为600m的一曲线路段上随机出现多处严重轨头踏面掉块伤损。经对钢轨伤损状态的分析以及化学成分分析、拉伸性能测试和金相检验对掉块伤损的原因进行了分析。结果表明:铜轨轨头踏面的掉块伤损是由其表层的马氏体组织造成.而马氏体组织的产生则是因列车车轮对钢轨的严重摩擦所引起的。
A high speed intercity railway was opened only about half a year, U71MnG 60 kg/m hot rolled rail was used in a station, the serious peeling defects were randomly appeared on the rail head tread of a line curve segment whose radius was 600 m at train terminal. By means of defect analysis, chemical composition analysis, tensile properties testing and metallographic examination, the reason of peeling defects was analyzed. The results showed that the peeling defects on rail head tread was caused by martensite on the surface layer, and martensite was due to serious friction between train wheels and rail.
出处
《理化检验（物理分册）》
CAS
2013年第11期766-769,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
钢轨
轨头踏面
掉块伤损
马氏体
摩擦
rail
rail head tread
peeling defects
martensite
friction
