基于超声检测技术的主蒸汽管道对接焊缝缺陷检测  

Defect Detection of Main Steam Pipe Butt Weld Based on Ultrasonic Testing Technology

作　　者：张皓琦 钱盛杰 王杜 竺国荣 陈定岳 孔凡玉 王强 ZHANG Haoqi;QIAN Shengjie;WANG Du;ZHU Guorong;CHEN Dingyue;KONG Fanyu;WANG Qiang(College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China;Ningbo Special Equipment Inspection and Research Institute,Ningbo 315048,China)

机构地区：[1]中国计量大学质量与安全工程学院,浙江杭州310018 [2]宁波市特种设备检验研究院,浙江宁波315048

出　　处：《锅炉技术》2023年第3期52-60,共9页Boiler Technology

基　　金：国家自然科学基金资助项目(51374188);浙江省市场监督管理局科研计划资助项目(20210137)。

摘　　要：为研究超声检测技术在大型锅炉管道焊缝缺陷检测中的应用,利用常规超声检测(UT)、超声衍射时差法(TOFD)和全聚焦超声相控阵(TFM)共3种方法,对锅炉主蒸汽管道模拟试块焊缝缺陷进行全面检测,分析了典型焊接缺陷在不同超声无损检测技术中的信号响应情况。试验结果显示:常规UT、TOFD、TFM 3种超声检测技术均能对锅炉主蒸汽管道对接焊缝的常见埋藏缺陷实现信号显示,但对表面裂纹缺陷的检出存在盲区。TOFD和TFM检测技术在对缺陷的精确定量方面更具优势,常规UT检测成本虽低,但更依赖操作人员的经验且对缺陷定性困难。通过对3种超声检测技术在主蒸汽管道焊缝缺陷检测中的对比研究,为锅炉管道缺陷的识别提供了重要保障,为大型锅炉的检验检测提供技术支持。In order to study the application of ultrasonic testing technology in large boiler pipe weld,conventional ultrasonic testing(UT),time of flight diffraction(TOFD) and total focusing method for ultrasonic phased array(TFM) are used to conduct a comprehensive inspection for weld defect of simulation test block of boiler main steam pipe,and the signal response of the typical weld defects in different ultrasonic nondestructive testing technology are analyzed.The experimental results show that three kinds of ultrasonic testing technology such as conventional UT,TOFD and TFM can all realize signal of common buried defect of boiler main steam pipe butt weld,but there are blinds spots in the detection of surface crack defects.TOFD and TFM are more advantageous in terms of accurate sizing of defects.Conventional UT is less expensive,but more dependent on operator's experience and more difficult to characterize defects.Through the comparative study of three ultrasonic detection technologies in the weld defect detection of the main steam pipe,this paper provides an important guarantee for the identification of boiler pipeline defects and provides technical support for the inspection of large boilers.

关 键 词：超声无损检测技术 锅炉主蒸汽管道 焊缝缺陷检测 常规超声检测 超声衍射时差法检测 全聚焦超声相控阵检测 

分 类 号：TG115.28[金属学及工艺—物理冶金]