论文部分内容阅读
对发电厂设备作无损探伤的测试方法,目前主要应用的有三种,即:超声波、x 射线与涡流。在过去几年中,这项技术虽有所发展,但还须进一步提高效率,降低成本,并使探测所获得的信号不致造成错误的判断。因应用超声波时,首先须由人员在被测部件上来回移动传感器,遇有裂纹或夹杂,反射波的振幅即有所改变,但例如不锈钢部件,其颗粒较粗,反射波信号与裂纹或夹杂所发生的返回信号非常相似。涡流探测有同样问题:在被试件的涡流遇到裂纹或夹杂所显现的是电阻空穴,但因几何形状的变化而产生的
There are three types of test methods for non-destructive testing of power plant equipment, namely: ultrasonic, x-ray and eddy current. In the past few years, although this technology has been developed, it is still necessary to further improve the efficiency, reduce the cost and make the signals obtained from sounding without causing false judgments. Because of the application of ultrasound, the sensor must first be moved back and forth by the personnel on the part under test. In the case of cracks or inclusions, the amplitude of the reflected wave is changed. However, for example, stainless steel parts with coarse particles, reflections and cracks or inclusions The return signals that occur are very similar. Eddy current probing has the same problem: when the vortex of the specimen encounters cracks or inclusions, it shows resistance holes, but due to the change of the geometry