LLT探头在厚壁窄间隙焊缝检测中的应用

Application of LLT Probe in Testing of Welds of Thick Wall and Narrow Gap

探讨了LLT技术的基本原理,及其在厚壁窄间隙焊缝检测中的实际应用。同时验证了该技术在实际工件上的检测能力。研究结果表明,LLT技术对垂直于检测面的面积性缺陷有着非常高的检测灵敏度,虽然该技术不能对缺陷进行定量分析,但能够比较准确的对缺陷进行定性,因此,LLT技术可以作为常规检测方法的有效补充。

The principle of LLT method, and practical inspection experience were introduced. Result showed that LLT method could detect defects perpendicular to the test surface with high sensitivity, but could not measure its sizing. By the combination of the Tip method and LLT method, the characteristics and sizes of defects could be analyzed.