核工程薄壁不锈钢焊缝交流电磁场检测模拟验证  

Research on Simulation Verification of Alternating Current Field Measurement Testing of Thin-walled Austenitic Stainless Steel Welds in Nuclear Power Plant

作　　者：王宇欣 高宇 马迎兵 杨会敏 袁新安[3] 郭利峰 WANG Yuxin;GAO Yu;MA Yingbing;YANG Huimin;YUAN Xinan;GUO Lifeng(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China;China Nuclear Industry 23 Contruction Co.,Ltd.,Beijing 101300,China;China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国核电工程有限公司,北京100840 [2]中国核工业二三建设有限公司,北京101300 [3]中国石油大学(华东),山东青岛266580

出　　处：《电焊机》2023年第12期33-39,共7页Electric Welding Machine

基　　金：ACFM检测技术验证研究(KY21111)。

摘　　要：针对薄壁(壁厚≤3.5 mm)奥氏体不锈钢焊缝缺陷检测需求,研发了一套包括探头和系统装备、方法、工艺的交流电磁场检测系统。设计了含不同类型、尺寸和位置缺陷的模拟试块,分别进行交流电磁场检测(ACFM)和射线检测(RT)盲测,并对比分析检测结果。验证试验结果表明:研发的ACFM检测系统和工艺稳定可靠,可实现薄壁不锈钢焊缝超标缺陷的快速有效筛查;ACFM效率是RT的3倍以上,对于预制的210处超标缺陷,RT检出169处,ACFM检出217处(含RT检出的169处),其中面积型缺陷均100%检出,误报率能满足工程需求;具有不低于RT的检出能力;ACFM技术对焊缝表面状态较敏感,适当打磨不影响缺陷检出。高灵敏度ACFM检测的研究和应用为薄壁非铁磁性材料焊缝内部缺陷检测提供了新思路。China Nuclear Power Engineering Co.,Ltd.led the research and development of a set of ACFM technology including probe,system equipment,methods and processes for the volume detection of thin-wall(≤3.5 mm)stainless steel welds in a national key engineering project.In this paper,a simulation test with different types,sizes and positions of defects was designed.ACFM and RT blind test were carried out respectively,and the test results were compared and analyzed.The verification test results show that the developed ACFM detection system and process are stable and effective,and can realize the rapid and effective detection of excessive defects in thin-wall stainless steel welds.For the super-standard defects in simulated test blocks,ACFM technology has no lower detection capability than RT.ACFM technology is sensitive to weld surface state,proper grinding does not affect the detection of defects.The research and application of high sensitivity ACFM detection provides a new idea for the detection of internal defects in welds of thin-walled non-ferromagnetic materials.

关 键 词：薄壁不锈钢焊缝 交流电磁场检测 射线检测 模拟验证 缺陷检出率 

分 类 号：TG441.7[金属学及工艺—焊接]