熔焊缝缺陷弱磁检测实验研究  

Research on Magnetic Intensity Test of Fusion Welding Joint

作　　者：赵本勇 王少飞 王永红 张楠 胡博[2] ZHAO Ben-yong;WANG Shao-fei;WANG Yong-hong;ZHANG Nan;HU Bo(Xi’an Aerospace International Truck and Engine Corporation,Xi’an 710100,China;Key Laboratory of Nondestructive Testing(Ministry of Education),Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]西安航天发动机有限公司,西安710100 [2]无损检测技术教育部重点实验室(南昌航空大学),南昌330063

出　　处：《失效分析与预防》2024年第2期87-94,共8页Failure Analysis and Prevention

基　　金：国家自然科学基金(51967014);航天六院先进适用工艺研究项目(2022Tm•JY5008-M)。

摘　　要：为实现熔焊缝缺陷的检测,基于弱磁检测技术,采用测磁传感装置对S06材料的焊缝进行检测,同时提出利用上、下测磁线圈的磁感应强度梯度曲线阈值线区分应力集中和缺陷信号的数据处理算法。结果表明:下测磁线圈的磁感应强度曲线在应力集中和缺陷处均存在磁异常特征,而上测磁线圈的磁感应强度曲线只在应力集中处存在磁异常特征;在应力集中处,上、下测磁线圈的梯度曲线均超出各自上下阈值线,而在缺陷处,仅下测磁线圈的梯度曲线超出其阈值线。此外,将缺陷信号借助二维图像显示的可视化方式进行分析,可以更加直观地对缺陷进行定位。To identify the defects of fusion welding joint,a magnetic sensing device was utilized to detect the weld block of S06 material based on the weak magnetic detection technology.A data processing algorithm was proposed to distinguish the stress concentration from the defect signal by using the threshold line of the magnetic induction gradient curve of the upper and lower magnetic coils.The results show that the magnetic induction curve of the magnetic coil has magnetic anomalies in both stress concentrations and defects while the magnetic induction intensity curve of the upper magnetic coil only demonstrate anomalies at stress concentrated sites.Additionally,at thosesites,the gradient curves of the upper and lower magnetic measuring coils both exceeded their respective threshold lines.Conversely,at defects,only the gradient curves of the lower magnetic measuring coils surpassed their threshold lines.Moreover,defect signals were analyzed by visualizing the two-dimensional image display,which could locate the defects more intuitively.

关 键 词：熔焊缝缺陷 弱磁检测 应力集中 可视化显示 

分 类 号：TG115.28[金属学及工艺—物理冶金]