核电主管道奥氏体不锈钢焊缝相控阵超声检测  

Implementation of Phased-array Ultrasonic Investigation for the Austenitic Stainless Steel Weldments in the Primary Piping Systems of Nuclear Power Stations

作　　者：葛广林 姚建松 朱琪 徐宁[5] GE Guanglin;YAO Jiansong;ZHU Qi;XU Ning(Engineering Institute of China Energy Engineering Group Co.,Ltd.,Beijing 100022,China;Zhejiang Non-Destructive Testing&Inspection Engineering Co.,Ltd.,Hangzhou 310016,China;Anhui Jinli Energy Technology Development Co.,Ltd.,Hefei,231200,China;Phased Array Inspection Application Department of China Energy Engineering Group Engineering Institute,Hefei 231200,China;Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,China)

机构地区：[1]中国能源建设集团有限公司工程研究院,北京100022 [2]浙江无损检测工程技术有限公司,浙江杭州310016 [3]安徽津利能源科技发展有限责任公司,安徽合肥231200 [4]中国能建工程研究院相控阵检测技术应用研究所,安徽合肥231200 [5]苏州热工研究院有限公司,江苏苏州215004

出　　处：《电力勘测设计》2023年第12期10-16,28,共8页Electric Power Survey & Design

摘　　要：针对核电主管道奥氏体不锈钢焊缝超声检测困难的问题,通过对微观组织的观察和工艺仿真,研究奥氏体不锈钢粗晶材料对超声束传播的影响,明确奥氏体不锈钢相控阵超声检测初步方案。着重分析双线阵和双面阵相控阵超声探头激发相控阵超声扇扫描和全聚焦检测优势,采用对比试块、模拟试块分析2种检测方法对表面缺陷和各种内部缺陷检测灵敏度、分辨力和信噪比,表明采用DML相控阵超声探头激发TFM全聚焦技术检测奥氏体不锈钢焊缝是可行的。To address the difficulty of ultrasonic testing for the austenitic stainless steel welds in nuclear reactor coolant pipes,this paper studies the influence of coarse grains in austenitic stainless steel on ultrasonic beam propagation through microscopic structure observation and process simulation.It determines a preliminary phased array ultrasonic testing solution for austenitic stainless steel.It analyzes the advantages of phased array ultrasonic testing using sectorial scan from linear array transducers and total focusing method(TFM)imaging from matrix array transducers,and compares the sensitivity,resolution and signal-to-noise ratio for detecting surface and various internal flaws by using reference blocks and simulation blocks.The results demonstrate that using TFM imaging excited by dual matrix array(DML)ultrasonic transducers is feasible for inspecting the austenitic stainless steel welds.

关 键 词：奥氏体不锈钢 相控阵超声 DML相控阵探头 TFM全聚焦技术 扇扫描 

分 类 号：TG115.282[金属学及工艺—物理冶金]