本文对数控车削纯镍时刀具的沟槽磨损问题，应用扫描电镜、电子探针、俄歇能谱仪等进行了探讨。重点研究了沟槽磨损的形成机理和过程，并对减少或消除刀具沟槽磨损的途径进行了试验研究。 In this paper, the problem of the wear of the tool when the pure nickel is numerically controlled is studied by using scanning electron microscope, electron probe, Auger spectrometer and so on. The formation mechanism and process of groove wear are studied emphatically, and the ways to reduce or eliminate the wear of groove are also studied.