Abstract:
PURPOSE: To understand process of arc ion plating and structure and characteristics of a TiN film according to experimental conditions through X-ray analysis and study life and abrasion shape of coated tools enabling high speed cutting by coating thin films of TiN, TiAlN, TiC and Al2O3, wear resistant thin films, on cutting tools, thereby improving abrasion and friction characteristics of cutting tools. CONSTITUTION: The structure control technology of coating layer and interface for improving durability of next generation multilayer coated tools for ultra-high speed cutting is characterized in that it is the optimum coating process of a CrN coating layer, wherein CrN of surfaces (111), (200) and (220) is preferably grown as a bias voltage is increased when analyzing the thin film to a stepsize of 0.5 at a diffraction angle of 20 to 80 degrees after coating a thin film on a matrix; growth of CrN is predominant when voltage is increased; a broad peak of amorphous phase is displayed when the bias voltage is low, but crystal phase of the sharp peak is displayed when the bias voltage is high since a broad peak is shown when the bias voltage is low, and a sharp peak is shown when the bias voltage is increased; crystal structure of Cr2N is hexagonal, and crystal structure of CrN is cubic; and the coating layer is changed from amorphous to crystalline as the bias voltage is increased, and (111) and (200) surfaces are preferred orientation of the CrN coating layer.