集箱端盖环焊缝的相控阵超声检测

Phased array ultrasonic testing for circumferential welding seam of header end cover

常规的集箱端盖焊接结构中,对接型与瓶塞型集箱端盖焊缝的检测存在差异。通过制作含人工模拟缺陷的集箱端盖焊缝,利用相控阵超声检测技术对其进行检测,并与射线检测和超声检测进行对比。试验结果表明,对于对接型与瓶塞型集箱端盖焊缝的检测,相控阵超声检测技术均具有很高的可靠性,可准确识别焊缝中的气孔和未熔合等常见缺陷,可以作为补充检测方法使用。

In the conventional design of welding structures for header end caps,there are differences in welding seam detection between butt type and bottle cap type header end cap structures.This paper used phased array ultrasonic testing technology to inspect the welding seam of the header end cover containing artificially simulated defects,and compares it with radiographic testing and ultrasonic testing.The experimental results show that phased array ultrasonic testing technology has high reliability in identifying common defects such as porosity and lack of fusion in the welding seams of butt joint and bottle cap type header end caps and can be used as a complementary test method.