Rail grinding will cause poor surface integrity when the critical grinding temperature is exceeded. To improve the grinding quality and explore the feasibility of grinding operations in rainy days, this study first investigated the surface integrity during rail grinding under wet conditions, including surface roughness, grinding burn, phase transition, residual stress, etc. Moreover, a grinding wheel finite element model was established considering abrasive grains' actual geometry and distribution, providing a novel thermodynamic coupling analysis method. As a result, it is revealed that the surface integrity is significantly improved under wet conditions, especially the grinding burn and white etching layer can be avoided, and residual tensile stress can be reduced by up to 45% since the thermodynamic coupling becomes less apparent.

当超过临界磨削温度时，钢轨磨削会导致表面完整性变差。为提高磨削质量，探索阴雨天磨削作业的可行性，本研究首先研究了潮湿条件下钢轨磨削过程中的表面完整性，包括表面粗糙度、磨削烧伤、相变、残余应力等。 此外，砂轮考虑了磨粒的实际几何形状和分布，建立了有限元模型，提供了一种新的热力耦合分析方法。结果表明，在潮湿条件下表面完整性得到显着改善，尤其是可以避免磨削烧伤和白色蚀刻层，并且由于热力学耦合变得不那么明显，因此残余拉应力可以降低高达 45%。