介绍了高频超声C扫描检测技术在多孔层板焊接质量检测中的应用。通过分析多孔层板内部结构，结合超声脉冲反射法传播特性，采用高频、小焦点聚焦探头，获得了更高的横向分辨率，实现了多孔层板焊接质量的有效评估。开展多孔层板构件的高分辨率超声C扫描检测，对焊接面进行高分辨率自动化扫描，达到了检测微小缺陷的目的。试验结果表明，所提出的高频超声检测工艺方法可行有效，可应用于多孔层板类构件焊接质量的自动化检测中。

This paper introduces the application of high-frequency ultrasonic C-scan detection technique in detecting the laminated porous plate. Considering about the internal structure of the porous laminated plate and the propagation characteristics of the ultrasonic pulse reflection method, a high-frequency, small-focus focusing probe is used to obtain higher lateral resolution, and an effective evaluation of the quality of the porous laminate is achieved. Aiming at detecting smaller defects, high-resolution automated C-scanning of the welded surface of laminate porous plate is performed. It is shown that the proposed high-frequency ultrasonic testing technique is feasible and effective, and it provides an important technical means for the automatic detection of welding quality of such components.