在设备运转过程中，键槽部位会发生磨损，键槽磨损修复工艺多种多样，在使用堆焊修复时，应重点关注焊接质量，避免发生焊接缺陷造成轴头力学性能下降以及修复效果不理想的问题。应用相控阵超声技术的工件仿真模拟和缺陷三维动态显示功能，实现了对电机转子键槽堆焊修复部位内焊接缺陷的有效检测和精确定量，为轴类键槽堆焊修复的检测工作提供了新思路。

There are various repairing processes for keyway wear. In the use of welding repair, attention should be focused on the welding quality to avoid mechanical performance degradation of the shaft head due to welding defects, leading to a non ideal repairing effect.In this article, phased array ultrasonic technology is applied to the workpiece defect simulation and three dimensional dynamic display function, and it has realized effective and accurate quantitative detection of weld defects of the motor rotor welding repair parts within the keyway. Present work may provide a new way of thinking for axial keyway surfacing welding repair test.