摘要
水电站过流部件涂层下存在裂纹会直接导致部件抗疲劳强度下降,影响机组安全。为实现涂层下裂纹检测,本文在对比多种常用无损检测方法基础上,优选出涡流检测作为过流部件检测方法,并对3种涡流检测方法进行试验分析。结果表明:脉冲涡流检测的检出效率较低且易受裂纹方向的影响,很难满足现场快速检测的要求;交流磁场检测无法穿透涂层,不能进行裂纹检测;阵列涡流检测能有效检测涂层下裂纹,适用于现场实施的过流部件涂层下裂纹检测。
Cracks under the coating of overcurrent components of hydropower station will directly lead to a decrease of the components' fatigue strength and affect the safety of the hydroelectric units.In order to realize crack detection under the coating,eddy current detection is selected as the detection method of over-current components in this paper,through comparison of multiple non-destructive detection methods.Three kinds of eddy current testing methods are analyzed.The results show that,the detection efficiency of pulsed eddy current testing is low and easy to be affected by the crack direction,which is difficult to meet the requirements of rapid detection on site.The ACFM testing can not penetrate the coating,and is not able to carry out crack detection.The array eddy current testing can effectively detect the cracks under the coating,which is suitable for the detection of cracks under the coating of overcurrent components on site.
作者
王鹏
朱红波
刘润兵
李东江
秦承鹏
何虎昌
江雄
王强
郎梼
WANG Peng;ZHU Hongbo;LIU Runbing;LI Dongjiang;QIN Chengpeng;HE Huchang;JIANG Xiong;WANG Qiang;LANG Tao(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Sichuan Huaneng Kangding Hydropower Co.,Ltd.,Chengdu 610041,China;Huaneng Nuozadu Hydropower Co.,Ltd.,Puer 665000,China)
出处
《热力发电》
CAS
北大核心
2020年第3期113-117,共5页
Thermal Power Generation
基金
中国华能集团有限公司总部科技项目(HNKJ18-H22)。
关键词
无损检测
过流部件
涂层
裂纹
涡流检测
阵列涡流检测
水电站
non-destructive detection
overcurrent parts
coating
crack
eddy current testing
array eddy current testing
hydropower station
作者简介
第一作者:王鹏(1983),男,硕士,高级工程师,主要研究方向为电站锅炉压力容器定期检验及金属检验,wangpeng@tpri.com.cn。
