汽轮机转子菌型叶根相控阵超声波检测的缺陷定量方法  

Imperfection Sizing Method of Turbine Straddle Tree Blade Roots Using Phased Array Ultrasonic Technology

作　　者：汪军[1] 

机构地区：[1]国核电站运行服务技术有限公司,上海200233

出　　处：《无损检测》2017年第1期19-23,共5页Nondestructive Testing

摘　　要：对核电站汽轮机中广泛使用的菌型类叶片叶根,采用相控阵超声波技术进行检测,分析了其定量检测结果。通过比对常规超声检测的几类测长方法(-6,-12 dB相对灵敏度法和绝对灵敏度法)来确定适用于菌型叶根的长度测量方法。通过对不同高度缺陷显示的特征分析,归纳出了菌型叶根的高度定量方法。This paper studied the imperfection sizing method using the advanced ultrasonic phased array inspection technology for the straddle tree blade roots.Indication length measurement was determined by comparing several conventional indication sizing methods,such as 6dB drop technique,12dB drop technique,and complete drop technique.Appropriate indication height measurement was conducted by analyzing the characteristics of various indications with different heights.

关 键 词：相控阵 菌型叶根 长度测量 高度测量 缺陷定量 

分 类 号：TG115.28[金属学及工艺—物理冶金]