前言:电热技术是新的无损测试方法。因为在很多情况下可以在几秒钟内测试整个部件,所以这种测试法快。这种方法不受中等表面不平(例如焊缝)的影响。这一特点使电热无损测试法可以应用于X 射线,超声,涡流或其他方法不能奏效的地方。应用时,使一个电流脉冲通过要测试的区域,并用红外线录像或其他热显像法(例如温度灵敏的磷光体或液晶)将产生的温度梯度绘制下来。电热无损测试的全部潜力还正在挖掘之中。本文叙述了电热法的原理和一些表明有 Foreword: Electrothermal technology is a new nondestructive testing method. Because in many cases the entire part can be tested in seconds, this test is fast. This method is not subject to moderate surface roughness (such as weld) impact. This feature allows the electro-thermal non-destructive testing method to be applied where X-rays, ultrasound, eddy currents or other methods do not work. When applied, a current pulse is passed through the area to be tested and the resulting temperature gradient is plotted using infrared recording or other thermal imaging methods such as temperature sensitive phosphor or liquid crystal. The full potential of electro-thermal non-destructive testing is also being explored. This article describes the principles and some of the electric heating method