介绍了核电站压力容器堆焊层下焊缝超声检测时, 由于堆焊层的影响, 产生变型波反射的特例。分析了因堆焊层产生变型波的原理以及变型波的定位方法。在实际堆焊层试块上, 对提出的变型波定位方法进行了验证。验证结果证明了堆焊层变型波的理论分析以及定位方法的正确性。该方法对判别因变型波造成的伪缺陷具有普遍的应用价值。

The anamorphic wave reflection caused by cladding was introduced when the welding under cladding was tested of pressure vessel of nuclear power plant. The causing principle of anamorphic wave and location method was analyzed. On a cladding weld, test was carried on for verifying the analysis. Verification results proved the accurate of the mentioned method which could widely used on the false single identification caused by anamorphic wave.