焊接接头中偏心缺陷的TOFD检测  

TOFD Technique Testing on Eccentric Flaws in Butt Weld Joints

作　　者：李海华[1] 赵立凡[1] 郭兴建[1] 唐飞阳亮[1] 

机构地区：[1]中国石油独山子石化公司压力容器检验所,独山子833600

出　　处：《无损检测》2009年第6期468-471,共4页Nondestructive Testing

摘　　要：针对采用TOFD技术检测焊缝缺陷时,缺陷偏离焊缝中心的技术难点,先从理论上研究了TOFD检测声场的覆盖特点,归纳了偏心缺陷对TOFD检测的影响。通过相关试验,对比了非平行扫查以及平行扫查的TOFD检测结果,得出可通过结合非平行扫查、平行扫查以及偏心非平行扫查的方法来确定偏心缺陷的结论。Aiming at the technical difficulties of time of flight diffraction（TOFD）testing on eccentric flaws in butt weld joints, the ultrasonic field was researched, and the impact of eccentric flaws to TOFD testing was concluded. Through the relevant experiments, the results of parallel scan and non-parallel scan were compared, and it concluded that the eccentric flaws could be determined by the method of the combination of non-parallel scan with parallel scan and eccentric non-parallel scan.

关 键 词：超声波衍射时差法检测 焊接接头 偏心缺陷 扫查方式 

分 类 号：TG115.28[金属学及工艺—物理冶金]