铝合金结构件焊缝质量涡流及X射线检测对比研究

涡流检测方法具有设备简单、检测速度快、灵敏度高、非接触式检测等优点,能及时检测焊缝质量情况,有效检测焊缝是否存在未焊透、焊接裂纹等缺陷,以分析确定焊缝内的潜在风险,现已成为铝合金结构件焊缝的有效检测手段。采用多频涡流检测技术,配合新型无方向性电扰动涡流传感器及X射线探伤仪,并制作铝合金结构件焊缝人工缺陷,通过对比试验两种不同的检测方法,分析两种方法的优劣。试验结果表明,多频涡流检测技术配合新型无方向性电扰动涡流传感器能够满足检测要求,减小焊缝表面焊道的凹凸不平产生的干扰影响,并且全面地发现缺陷;相比之下,虽然X射线检测结果更为直观,但检测速度较慢,不适合现场应用及缺陷快速定位。

Contrastive study of eddy current testing and X-ray detection in welding seam of aluminum alloy components

The eddy current testing has the advantages of simple device requirement,fast detection speed,high sensitivity and noncontact detection etc.,which can detect the quality and defects of welding seam just in time,such as incomplete penetration and cracks,to determine the potential risks in the weld.It has become an effective detection method for welding seam in aluminum alloy components.In this paper,the multi-frequency eddy current testing in association with novel non-directional eddy current sensor and X-ray detection were applied,and the precast defects of welding seam in aluminum alloy structured components were conducted.Besides,the advantages and disadvantages of the two different testing methods were compared.The results illustrated that the detection requirements of the welding seam in aluminum alloy components could be satisfied through the multi-frequency eddy current testing in association with the novel non-directional eddy current sensor,which would reduce the interference effect caused by the irregularity of welding seam surface,detecting the welding defects comprehensively;in contrast,although the X-ray detection results were more intuitive,the detection speed was slower,which was not suitable for field application and rapid location of defects.