前言中薄板焊缝超声波探伤缺陷定量,虽有许多方法,但都是近似的,这对公正合理地评判产品合格与否带来了一定的困难,因此,准确测定焊缝中缺陷的大小,其重要性越来越突出了。中薄板焊缝超声波探伤问题,涉及到焊缝专用探伤仪和探头的试制;中薄板中超声场结构及中薄板焊缝中各反射体的反射规律;对比 Foreword in the ultrasonic flaw detection of thin-walled weld flaw quantitative, although there are many ways, but they are approximate, which fair and reasonable assessment of the product qualified or not brought some difficulties, therefore, accurately determine the size of the weld defects, which The importance is more and more prominent. Ultrasonic testing of medium and heavy-plate welds involves the trial production of special flaw detectors and probes for welds; the reflection patterns of the reflectors in the ultrasonic field structure and the medium-sheet welds in medium and thin plates;