基于相控阵超声的铝合金熔焊缝缺陷深度定位技术研究

Research on Flaw Depth Positioning of Aluminum Alloy Melting Welding Seam Based on Ultrasonic Phased Array

传统的射线照相检测技术仍是铝合金熔焊缝缺陷的主要检测方式,由于传统射线照相检测无法测量缺陷在焊缝高度方向上的尺寸和位置,在缺陷的定位和排除方面存在不足,从而加大缺陷排除的工作量,甚至由于缺陷排除方向错误造成焊缝挖穿,影响补焊质量。相控阵超声检测技术通过接收缺陷回波来实现缺陷检测,可以反映缺陷的尺寸和位置信息。本文采用Omni Scan MX相控阵超声检测仪和5L64-A2相控阵探头针对对比试块、铝合金熔焊缝缺陷进行了定位技术研究,并与缺陷微观测量、宏观测量的结果进行对比,结果表明基于相控阵超声检测的铝合金熔焊缝缺陷深度定位检测结果与微观检测结果基本一致,可以采用相控阵超声检测技术进行铝合金熔焊缝缺陷深度定位。

The traditional conditional radiography testing, which is the main testing technology of welding seam, can not gain the size and position in the welding seam height. Therefore the disadvantage increases the workload of eliminating flaw and affects repairing welding quality. The phased array ultrasonic technology can detect flaw size and position by flaw echo wave. The positioning technology of reference test pieces and aluminum alloy melting welding seam is studied by the Ominsacn MX phased array ultrasonic and 5L64-A2 detector. The research result, microscopic measurement and macroscopic measurement are contrasted. The result shows that measurement of phased array ultrasonic, microscopic and macroscopic is uniform, thus the phased array ultrasonic can be used to detect the flaw position of aluminum alloy melting welding seam.