在役动车组空心车轴中心孔内表面缺陷超声检测研究  

Study on Inner Surface Defects of Hollow Axle Center Hole of In-service EMU by Ultrasonic Testing

作　　者：黄永巍 吴毅 张澎湃 毕超 高鹏 霍锋锋 薛清涛 刘春生 HUANG Yongwei;WU Yi;ZHANG Pengpai;BI Chao;GAO Peng;HUO Fengfeng;XUE Qingtao;LIU Chunsheng(Metals and Chemistry Research Institute,China Academy of Railway Sciences Group Corporation Limited,Beijing 100081,China;Zhiqi Railway Equipment Co.,Ltd.,Taiyuan Shanxi 030032,China)

机构地区：[1]中国铁道科学研究院集团有限公司金属及化学研究所,北京100081 [2]智奇铁路设备有限公司,太原030032

出　　处：《高速铁路新材料》2022年第5期80-83,共4页Advanced Materials of High Speed Railway

基　　金：中国铁道科学研究院集团有限公司科研项目(2020YJ096)。

摘　　要：目前在役动车组空心车轴超声检测对象有外表面纵向、横向缺陷,中心孔内表面纵向、横向缺陷,以及内部材质缺陷。通过人工缺陷全尺寸台架试验结合理论分析,确定了正常运用条件下,空心车轴中心孔内表面横向及纵向缺陷不会萌生出疲劳裂纹,可不作为在役空心车轴超声检测的缺陷类型,在确保空心车轴运用安全的同时,避免了大量无效检测工作。At present,the ultrasonic testing objects of hollow axle of EMU in service include longitudinal and transverse defects on the outer surface,longitudinal and transverse defects on the inner surface of center hole,and internal material defects.Through the full-scale bench test of artificial defects and theoretical analysis,the longitudinal and transverse defects on the inner surface of center hole do not initiate fatigue cracks under normal operating conditions,and can not be used as the defect type of ultrasonic inspection of hollow axle in service,which ensures the safety of hollow axle operation and avoids a large number of invalid inspection work.

关 键 词：动车组 空心车轴 中心孔 超声检测 缺陷类型 

分 类 号：U269.3[机械工程—车辆工程]