显微CT检测技术在复杂结构焊缝无损检测中的应用

针对复杂结构焊缝的检测问题,开展了三维显微CT检测技术研究。分析了复杂结构焊缝的常规射线检测难点,利用三维显微CT检测技术焦点尺寸小(微米级)、检测分辨率高等优势,对复杂结构电子束对接焊缝、端面焊缝以及钎焊缝进行了检测,得到了良好的检测效果。实验结果表明,通过三维显微CT检测技术可实现复杂结构焊缝的三维检测,进而实现对微气孔、微裂纹、未焊透等缺陷的识别、定位与测量,为焊缝质量评估提供依据。

Application of Micro CT in Nondestructive Testing of Welds with Complex Structure

In this article, three dimensional (3D) micro CT detection technique was employed to test welds with complex structures. The difficulties of testing the complex structure of welds using conventional radiographic testing were analyzed,thus, 3D micro CT, which provided advantages such as micron order focus size, and high resolution, achieved favorable testing results in electron beam weld, edge weld, and solder joint with complex structures. The results showed that 3D micro CT can realize the three-dimensional testing of complex structure welds. Furthermore, 3D micro CT can identify, locate and measure the holes, cracks, and incomplete penetration, providing foundation of weld quality evaluation.