货车转向架侧架最有前途的无损检验方法是采用对零件形状和表面光洁度敏感性最小的磁力探伤法。为了判断这种方法能否用来进行侧架的探伤,曾研究了侧架的磁特性、缺陷区的形貌、磁化规范。研究是在带有缺陷的三个侧架试样上进行的。其中两个试样取自弹簧座下角带筋区有横向疲劳裂纹的 The most promising non-destructive testing method for truck bogie side frames is the use of a magnetic inspection method that has the least sensitivity to part shape and surface finish. In order to determine whether this method can be used to inspect the side frames, the magnetic properties of the side frames, the morphology and the magnetization specifications of the defective areas have been studied. The study was performed on three side-frame specimens with defects. Two of the specimens were taken from the fatigue crack at the lower corner of the spring seat with transverse fatigue cracks