Method for regulating and controlling impurity distribution based on surface zone melting so as to improve metal surface machining quality

The invention provides a method for regulating and controlling impurity distribution based on surface area smelting to further improve metal surface processing quality, which comprises the following steps of: 1, quickly melting a metal surface, and quickly cooling the metal surface after impurities with an average distribution coefficient less than 1 migrate to a melting area so as to solidify the impurities in the melting area; secondly, the melting area is removed; and thirdly, ultra-precision machining is conducted on the metal surface with the melting area removed. According to the method, through impurity regulation and control, the subsurface layer purification area in which the impurities are migrated to the surface layer melting area is selected for ultra-precision machining, so that the surface quality defect caused by the metal impurities is avoided, and a machined surface with higher quality is obtained. 本发明提供了一种基于表层区域熔炼调控杂质分布进而提升金属表面加工质量的方法，步骤一、使金属表面快速熔化，待平均分配系数小于1的杂质迁移至熔化区域后，快速冷却金属表面从而将杂质固化在所述熔化区