一、前言焊缝超声探伤中不论调整仪器的灵敏度或者定量缺陷大小时,一般需采用参考孔作比较,如用平底孔、横通孔、球孔,槽口、聚焦柱面(IIW试块)或纵柱孔(A_2试块),对于平面型缺陷定量用平底孔,长条形缺陷希望采用横通孔,气孔则采用球孔,根部裂纹或未焊透采用槽口,这样做目的希望定量更为近似,实际上探伤时要同时采用几种参考试块是很难办得到的。虽然平底孔定量具有面积的概念,直观,但制作较困难。目前探伤愈来愈多的采 I. Introduction Weld ultrasonic flaw detection regardless of the sensitivity adjustment or quantitative defect size, the general need to use reference holes for comparison, such as with flat-bottomed holes, horizontal through-hole, ball hole, notch, focusing cylinder (IIW test block) Or column hole (A_2 test block). For flat-type defects quantitative flat-bottomed holes, long-shaped defects want to use horizontal through holes, stomata use ball holes, root cracks or not welded through the slot, so the purpose of quantitative hope More approximate, in fact, to test several reference blocks at the same time it is difficult to get. Although flat-bottomed wells have the concept of area, intuitive, they are more difficult to make. Currently more and more mining exploration