磁粉探伤检测中轴承套圈线性磁痕的形成原因

摘要

某轴承外圈在磁粉探伤检查中发现，在轴承外径某个区域内出现轴向线性磁痕。通过磁粉探伤、金相检验、显微硬度检验、能谱分析等方法和综合分析，确定了次表面连续分布的条带状碳化物是造成轴承套圈线性磁痕的原因。%It has been found that the axial linear magnetic marks appeared in an area of the bearing outside diameter during the magnetic particle testing in bearing outer ring. By means of the magnetic particle testing, macrostructure testing, micro hardness testing and energy spectrum analysis, the cause of the axial linear magnetic marks is revealed. The results show that the cause of the axial linear magnetic marks in bearing outer ring is banded carbide of continuous distribution in secondary surface.