轴箱外圈弹簧局部点接触疲劳断裂原因分析  

Analysis of Cause of Local Point Contact Fatigue Fracture of Axlebox Outer Ring Spring

作　　者：逯连文[1] 郭莉萍[1] 刘晓琴[1] 

机构地区：[1]长春轨道客车股份有限公司质量保证部理化检验室,吉林长春130062

出　　处：《工程与试验》2014年第4期46-49,共4页Engineering and Test

摘　　要：某铁路客车轴箱外圈弹簧在运行中发生断裂,对断裂件进行了断口、化学成分、硬度和金相检验分析。结果表明,该轴箱外圈弹簧在运行中,支撑圈与工作圈之间产生局部点接触,是其发生早期疲劳断裂的主要原因。The axlebox outer ring spring of a railway passenger car fractured in operation.The fracture surface,chemical composition,hardness and metallography of the fractured parts are examined and analyzed.The experiment results show that the cause of the early fatigue fracture is the local point contact between the support ring and the working ring of the axlebox outer ring spring.

关 键 词：轴箱外圈弹簧 疲劳断口 点接触 剥离裂纹 

分 类 号：U260.331.4[机械工程—车辆工程]