分析了脉冲反射法(PE)和超声波衍射时差法(TOFD)组合检测方法的特点和原理, 介绍了PE和TOFD组合检测方法在环向对接焊缝检测中的应用。通过多种检测方法对预制缺陷进行检测和分析, 发现该组合检测技术不仅能合理地分析评定缺陷, 又能极大地提高检测效率。PE和TOFD检测技术的组合应用, 不仅能控制产品质量, 又能保证缺陷检出率和检出效果。

The characteristics and theory of combination of pulse-echo (PE) and time of flight diffraction (TOFD) techniques are shown in this paper. The application of this combination in circumferential butt weld inspection is introduced either. Compared with the inspecting results of some other inspection methods to the same preset defects, present defect evaluation is more reasonable with higher inspection efficiency and lower labor intensity. The combination of PE and TOFD techniques is not only quite valuable for product quality control in a more economical and reliable way, but also is guaranteed to defect inspection rate and detection effect.