薄壁高频电阻焊管焊缝的爬波检测

Creeping Wave Testing for Weld of Thin-walled High-frequency Electric Resistance Welded Pipe

电阻焊管焊缝中易出现的缺陷有未熔合(冷焊)、裂纹、夹杂等,该类缺陷主要为沿焊缝延伸的面积型缺陷,采用超声检测。根据薄壁高频电阻焊管焊缝的缺陷特征,选用了超声爬波检测。阐述了超声爬波检测的原理、特点和工艺方法,设计了爬波检测专用探头和对比试块。实际检测结果表明,爬波检测是一种新型高效的检测方法,证明了爬波检测技术在薄壁电阻焊管焊缝检测中的可行性。

Some defects easily appear in weld of HFW pipe, such as incomplete fusion （cold welding）, crack, inclusion etc. The above defects are mainly area type defects along weld extension. These defects can be detected by creeping wave testing according to defects characteristics of thin-walled high-frequency electric resistance welded pipe. In this article, it expatiated the detection principle, features and process method of the creeping wave testing method, designed the creeping wave testing special probe and the reference blocks. The practical detection results showed that the creeping wave testing is a new type of high efficient detection method, and the creeping wave detection technology feasibility in thin-walled high-frequency electric resistance welded pipe was proved.