The purpose of this paper is to investigate effects of coatings on cutting tool wear. For this purpose, wear test, quick-stop test, and cutting force measurements have been made using various WC cutting tools.
The results of the experiments have shown that ;
The high hardness of coated layer is the major reasons for the decrease of the tool wear. The reduction of metal adhesion resulted from low chemical affinity between steel and coating materials is also another important reason for the decrease of tool wear. The low metal adhesion results in lower friction between tool surface and chip, showing the low cutting force. From the cutting test of S45C material, it is shown that the TiC-Ti(CN)-TiN multi-coated tool exhibits fairly good wear resistance since the TiC coating is resistant to mechanical wear due to high hardness and the TiN coating is resistant to thermo-chemical wear because of the chemical stability.
