摘要
某地铁受电弓预调螺杆在运行过程中发生断裂失效,采用化学成分分析、断口宏微观分析、金相检验、力学性能测试等方法对该螺杆的断裂原因进行了分析。结果表明:在运行过程中螺杆螺母端螺纹连接副表面发生磨损、腐蚀,且螺杆承受交变弯曲载荷作用,导致螺杆发生了腐蚀疲劳断裂。
The fracture failure of the adjust stud in metro pantograph happened during runtime,the fracture reasons of the adjust stud in metro pantograph were analyzed by means of chemical composition analysis,fracture macro and micro analysis,metallographic examination,mechanical property test and so on.The results show that the surface of threaded connection pair at the end of the nut was worn and corroded during runtime,and the adjust stud was subjected to alternating bending load,which resulted in corrosion fatigue fracture of the stud.
作者
玄东升
章利炳
沈贤
刘海波
张鹏
王慧
XUAN Dongsheng;ZHANG Libing;SHEN Xian;LIU Haibo;ZHANG Peng;WANG Hui(CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China;Lante Optics Co.,Ltd.,Jiaxing 314013,China;Quality and Technical Supervision Station of Haiyan County,Haiyan 314300,China~ 4.Zhejiang GuoJian Testing Technology Co.,Ltd.,Haiyan 314300,China)
出处
《理化检验（物理分册）》
CAS
2018年第9期676-679,691,共5页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
浙江省分析测试计划项目(2018C37035)
国家质量监督检验检疫总局科研计划项目(2015QK074)
关键词
地铁受电弓
螺杆
断裂失效
疲劳腐蚀
metro pantograph
stud
fracture failure
fatigue corrosion
