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磁痕是对缺陷的放大显示,而磁粉性能、磁化规范、磁悬液的浓度和粘度、工件表面情况、裂纹形状等多种因素都会对影响磁痕形态和分布。在实际工作中掌握磁痕形成的成因,并结合磁痕特征正确分辨出缺陷磁痕,是磁粉探伤中关键一步。
Magnetic marks are enlarged display of defects, and magnetic powder performance, magnetization specifications, the concentration and viscosity of the magnetic suspension, the workpiece surface conditions, crack shape and other factors will affect the shape and distribution of magnetic marks. It is a key step in magnetic particle inspection to master the cause of the formation of magnetic marks in practical work and to correctly distinguish the magnetic defects with the characteristics of magnetic marks.