超声红外热像技术检测激光焊缝质量

Ultrasonic Infrared Thermography Testing for the Quality of Laser Welded Seams

摘要: 超声红外热像技术是一种新兴的无损检测技术。使用超声作为热激励源，可以实现对缺陷部位选择性热激励，同时用红外热像仪捕捉材料表面温度变化。介绍了超声红外热像技术的基本原理，对两类激光焊接试件进行了检测。试验结果可用以分析激光功率和焊接速度对焊接质量的影响。

Abstract: The ultrasonic infrared thermography is a new nondestructive testing technology. Ultrasonic wave was used as heat source to heat the cracks selectively. At the same time, an infrared camera detects the surface temperature of the sample. The principle of ultrasonic infrared thermography was introduced, two kinds of laser welded seams were tested by it, and the effect of laser power and welding velocity on the quality of welded seams could be analyzed by the results.