Test piece for magnetic powder detection by axial electrifying method

The utility model belongs to the technical field of non-destructive testing, and discloses a test piece for magnetic particle detection by an axial electrifying method, which comprises a metal pipe fitting, the outer surface of the metal pipe fitting is a detection surface, the inner surface of the metal pipe fitting is provided with at least two detection grooves with different widths along the axial direction, and the length of the detection grooves is equal to that of the metal pipe fitting. And the distance from the bottom of the detection groove to the detection surface continuously changes along the axial direction of the metal pipe fitting. The test piece provided by the utility model can be used for optimizing technological parameters of magnetic particle detection by an axial electrifying method and improving the near-surface longitudinal defect detection capability of ferromagnetic solid and hollow workpieces. 本实用新型属于无损检测技术领域，公开了一种用于轴向通电法磁粉检测的试件，包括金属管件，金属管件的外表面为检测面，金属管件的内表面沿其轴向设有至少两条宽度不等的检测槽，检测槽与金属管