The purpose of this experimental study is to investigate the flank and crater wear of coated WC insert tool and to find the effect of a coating layer, TiN or TiC, on its wear resistance.
The tools used in the experiment were the commercial P20 insert tools with and without TiN coating and the laboratory treated P20 with TiC coating. The P20 coated with TiC were prepared by Chemical Vapor Deposition technique in the laboratory. In order to investigate the wear resistance of each insert tool, the mean flank wear land and the max. depth of crater wear were measured after every pass of cutting in outfeed facing operation. A tool dynamometer and tool-workpiece thermocouples also measured the cutting force and the temperature at the tool-workpiece interface, respectively, to provide a further analysis of the wear resistance.
The mean flank wear land of the TiN or TiC coated insert tool was reduced to one third or one fourth of that of the P20 without coating layer. The crater wear of the P20 with coating layers was not significant. The cutting force and the temperature of the P20 with TiN or TiC coating were about 80 to 90 per cent of the P20 without coating layer.
