钢轨钢的接触疲劳伤损及实验研究  

The Rolling Contact Fatigue of Rails and Experimental Research

作　　者：陈颜堂[1] 刘东雨[1] 方鸿生[1] 白秉哲[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《中国铁道科学》2001年第1期52-56,共5页China Railway Science

摘　　要：本文简要综述了钢轨钢的接触疲劳伤损特征和疲劳成因 ,探讨了提高钢轨钢使用寿命的途径 ,研究了三种中低碳贝氏体钢的接触疲劳行为。Contact fatigue damage is one of the main failure modes of rail.This article summarizes the fatigue damage characteristics,the cause of formation,and the result of experiment research,also researches on the method of extending service life of rail steel. The factors that affect contact fatigue life are:Maximum contact stress-When the maximum contact stress is more than 1 200 Mpa,as it increases the contact fatigue life is decreased exponentially.When the maximum contact stress is less than 1 200 MPa,it has linear relationship with contact fatigue life;Residual stress,pressure stress and pulling stress-Range and maximum of pulling stress,and the distance to the surface were correlated with contact stress;Impurity in the rail-Many scholars pay great attention to it,they summarizes affecting factors of damage crack of sundries in the oxide,and affecting factors of crustiform crack is correlated with contact stress. This paper discussed the mechanism of subsurface distortion layer that is surface white layer,of impurity,of maximum shear stress,and of maximum pulling stress,in the formation of contact fatigue. To prolong the service life of rail steel,the paper puts forward the method of improving contact fatigue performance of metal material.

关 键 词：钢轨钢 接触疲劳伤损 贝氏体钢 成固 实验研究 铁路 

分 类 号：U213.42[交通运输工程—道路与铁道工程]