Characteristic features of wear in tools made of high-speed steels with surface engineered coatings .1. Wear characteristics of surface engineered high-speed steel cutting tools

Characteristic features of wear in tools made of high-speed steels with surface engineered coatings incorporating ion nitriding and (Ti,Cr) nitride CAPDP (cathode are plasma deposition process) coatings were investigated at increased cutting speeds in the vicinity of 55-100 m min(-1). The wear kinetics, the change of micro-relief of cutter surface and the depth of the unhardened zone of cutting indexable inserts made of high-speed steels with surface engineered coatings were studied. A significant tool life was found for the surface engineered high-speed steel under the greatest possible localization of thermomechanical effects in the CAPDP coating layer. The application of a surface engineered system composed of a heat resistant high-speed steel T15 (P12M3 Phi 2K5) substrate, with surface modified by ion nitriding and then by CAPDP (Ti,Cr)N coating, provides this result.