目的 去除焊接管件焊缝处的氧化皮，改善焊缝处的应力状态。方法 采用振动辅助磁针磁力研磨法去除导磁材质管件经焊接处理后焊缝表面的氧化皮，利用超景深电子显微镜观察氧化皮的去除情况;利用X射线能谱分析仪对焊缝表面氧化皮的成分进行分析，根据氧化皮及管件材料主要元素的占比情况，分析检测焊缝表面氧化皮是否被完全去除。结果 焊缝表面氧化皮经振动辅助磁针磁力研磨后被完全去除。通过对比振动辅助磁针磁力研磨前后的表面形貌发现，表面颜色由黑变光亮，氧化皮得到有效去除。通过EDS成分分析可知，氧化皮的主要成分为C元素，质量分数为88.62%;管切面显示基体的主要成分为Fe元素，质量分数为67.09%。通过振动辅助磁力研磨法去除氧化皮后，管表面的元素组成与研磨前相比C元素降低了85.52%，Fe元素增加了63.06%。表面残余应力由原始的+17.5 MPa变为?186.0 MPa。经研磨后，氧化皮基本被完全去除。结论 焊缝表面成分的检测结果证实，从表面形貌分析中得到氧化皮被完全去除的结论是正确的，同时也表明振动辅助磁针磁力研磨对完全去除焊缝表面的氧化皮具有可行性。

Magnetic needle magnetic grinding technology, as a kind of surface finishing technology, has the advantages of good flexibility and adaptability. Besides, it can also conduct finishing process on small parts, complex outer surfaces and inner surfaces of pipes. Due to the existence of defects such as oxide scale at the weld joints, the service performance of the parts is seriously affected. This article uses vibration assisted magnetic needle magnetic grinding technology to grind welded pipe fittings, and explores the effect of removing oxide scale on the weld surface and the improvement of the residual stress state, which provides a new method for weld surface treatment.