球墨铸铁曲轴因其主轴颈、连杆轴颈与轴臂尺寸相差较大,浇铸时在轴颈转角处,即通常称为曲轴的R根部由于补缩条件不良,冷却后产生缩松、缩孔等缺陷,在使用中该部位因应力集中而造成断裂。因此,我们重点选择的探伤部位为图1中的1～8处,并制作了专用探头,利用偏向的超声横波检验这些部位的缺陷。 Ductile iron crankshaft due to the main journal, connecting rod shaft and arm size difference between the larger cast at the journal corner, which is often referred to as the crankshaft R root due to poor feeding conditions, resulting in shrinkage shrinkage after cooling And other defects, in the use of the site due to stress concentration caused by fracture. Therefore, we focus on the detection of the selected part of Figure 1 in 1 to 8, and made a special probe, the use of bias ultrasonic shear wave test these defects.