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《Physical Testing and Chemical Analysis(Part A:Physical Testing)》 2018-09
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Failure Analysis on Fracture of Adjust Stud in Metro Pantograph

XUAN Dongsheng;ZHANG Libing;SHEN Xian;LIU Haibo;ZHANG Peng;WANG Hui;CRRC Changchun Railway Vehicles Co.,Ltd.;Lante Optics Co.,Ltd.;Quality and Technical Supervision Station of Haiyan County;Zhejiang GuoJian Testing Technology Co.,Ltd.;  
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.
【Fund】: 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)
【CateGory Index】: U231.8
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