发电机护环内壁超声检测技术研究进展  

Progress of Research on Ultrasonic Inspection Technology for Inner Wall of Generator Guard Ring

作　　者：刘明星 LIU Mingxing(Datang Boiler and Pressure Vessel Inspection Center Co.,Ltd.,Hefei 230088,Anhui China;East China Branch,China Datang Corporation Science and Technology Research Institute Co.,Ltd.,Hefei 230088,Anhui China)

机构地区：[1]大唐锅炉压力容器检验中心有限公司,安徽合肥230088 [2]中国大唐集团科学技术研究总院有限公司华东电力试验研究院,安徽合肥230088

出　　处：《热处理》2023年第1期6-9,共4页Heat Treatment

摘　　要：发电机护环组织为粗大奥氏体,其声学特性各向不同,导致超声检测信噪比低及定位定量精度不足。详细介绍了对发电机护环内壁进行在役超声检测的特点及超声衍射时差法、超声波脉冲反射法和超声相控阵检测法等超声检测技术的工作原理和应用。The microstructure of generator guard ring is coarse austenite,and exhibits different acoustic characteristics in different directions,resulting in low signal-to-noise ratio and insufficient positioning and quantitative accuracy of ultrasonic detection.The special features of inspecting inner wall of generator guard ring in service with ultrasonic testing,as well as the operating principle and applications of ultrasonic testing technologies such as time of flight diffraction technique,ultrasonic pulse reflection method,and ultrasonic phased array inspection method were introduced in detail.

关 键 词：护环 超声检测 奥氏体 晶粒度 

分 类 号：TB559[理学—物理]