金属管道未焊透缺陷红外在线检测可行性分析  

Feasibility Analysis of On-Line Infrared Detection of Incomplete Penetration Defect in Metal Pipe Welded Joint

作　　者：陈涛 李伟忠 刘延雷 王飞 蒋诚航 周泓[2] CHEN Tao;LI Weizhong;LIU Yanlei;WANG Fei;JIANG Chenghang;ZHOU Hong(Hangzhou Special Equipment Inspection Institute,Hangzhou 310051,China;College of Biomedical Engineering&Instrument Science,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]杭州市特种设备检测研究院,浙江杭州310051 [2]浙江大学生物医学工程与仪器科学学院,浙江杭州310027

出　　处：《红外技术》2019年第12期1146-1150,共5页Infrared Technology

基　　金：浙江省质量技术监督系统NQI项目（20180117）

摘　　要：针对红外热成像技术对在用高温金属管道的未焊透缺陷进行检测的问题,使用有限元分析的方法,对含未焊透缺陷的金属管道焊接接头外表面温度分布进行了数值计算,在对稳态传热计算结果进行分析之后,提出采用外表面冷却激励的方式,将含缺陷管道外表面温差放大,结合金属管道焊接接头外表面施加冷却激励过程的瞬态传热分析,对红外热成像检测的现场检验可行性进行了研究和探讨,该研究成果可以为在线运行的高温金属压力管道焊接缺陷红外热成像检测应用提供参考。In this work, infrared thermal imaging technology was used to detect incomplete penetration defects of high temperature metal pipes. Finite element analysis was used to numerically calculate the temperature distribution of the outer surface of the welded joints of metal pipes with impervious weld defects. Based on numerical calculation results, external surface cooling excitation was proposed to amplify the temperature difference of the outer surface of the pipeline containing defects, and theon-site inspection of infrared thermal imaging detection was realized. The results of this research can provide a reference for the application of infrared thermal imaging for the online detection of high temperature and pressure metal pipeline welding defects.

关 键 词：红外热成像 无损检测 压力管道 未焊透 

分 类 号：TG115.28[金属学及工艺—物理冶金]