高铁轮轨钢的发展及高速下的轮轨损伤

随着列车运行速度的提高,车轮和轨道用钢也在不断更新换代。通过对比国内外车轮和轨道用钢的化学成分、力学性能,指明微合金化是提高高速列车轮轨钢性能的关键因素:微合金化能够在保证高强度的同时显著提高钢的韧性,从而提高钢的抗疲劳性能。并对近期关于高速列车轮轨磨损、滚动接触疲劳以及磨损和滚动接触疲劳之间关系的研究进展进行了综述。

Development of High-speed Wheel and Rail Steel and the Damage of Wheel and Rail under High Speed

With the train speed increasing,wheel and rail steel are also upgrading constantly.By comparing the chemical composition and mechanical properties of domestic and foreign wheel and rail steels we point that micro-alloying is the key factor to improve the performance of high-speed train wheel-rail steel.Micro-alloying can ensure high strength while improving the toughness of steel significantly thereby improving the fatigue properties of steel.At the same time,the recent research about wear,rolling contact fatigue and the relationship between wear and rolling contact fatigue about high speed train wheel-rails are summarized.