直线地段钢轨踏面斜裂纹下核伤检测不良原因分析及对策研究  

Cause Analysis and Countermeasures of Kidney Shaped Fatigue Cracks Poor Detection Under Rail Tread Oblique Cracks in Straight Sections

作　　者：谢祺 覃志乐 陆周永 徐强 蔡明 李亚北 XIE Qi;QIN Zhile;LU Zhouyong;XU Qiang;CAI Ming;LI Yabei(Industrial and Electrical Testing Institute,China Railway Nanning Group Co.,Ltd.,Nanning Guangxi 530029,China;Engineering Department,China Railway Nanning Group Co.,Ltd.,Nanning Guangxi 530029,China)

机构地区：[1]中国铁路南宁局集团有限公司工电检测所,南宁530029 [2]中国铁路南宁局集团有限公司工务部,南宁530029

出　　处：《高速铁路新材料》2025年第1期82-86,共5页Advanced Materials of High Speed Railway

摘　　要：近年来普速铁路货运干线出现以滚动接触疲劳为主的钢轨伤损形式。其中,直线地段钢轨踏面斜裂纹下核伤发展快、危害大,且设备检测效果不佳,斜裂纹下核伤已成为威胁防断安全的突出隐患。针对该情况,通过收集伤损信息、现场解剖下道伤损,总结了斜裂纹下核伤的分布及发展规律。在分析探伤仪检测不良原因、对比现有探伤设备对该类伤损的检测原理后,提出以探伤车为主、双轨仪为辅、适当缩短检测周期的检测卡控方案。实际检测情况表明,该方案运用效果良好。In recent years,rail damage on ordinary speed railway freight mainlines has mainly occurred in the form of rolling contact fatigue.Among them,the kidney shaped fatigue crack under the rail tread oblique crack in the straight section is a prominent hidden danger that threatens the safety of fracture prevention due to its rapid development and significant harm,and the poor detection effect of the equipment.In response to this situation,starting from collecting injury information,summarized the distribution and development patterns of kidney shaped fatigue cracks under rail tread oblique cracks.After analyzing the causes of defects detected by the flaw detector and comparing the detection principles of existing flaw detection equipment for this type of damage,a detection control scheme was proposed,with the inspection vehicle as the main equipment and the dual track flaw detector as the auxiliary,and the detection cycle was appropriately shortened.The actual testing results show that the scheme is effective.

关 键 词：钢轨踏面斜裂纹 核伤 探伤仪 探伤车 

分 类 号：U213.43[交通运输工程—道路与铁道工程]