SURFACE-COATED CUTTING TOOL HAVING HARD COATING LAYER CAPABLE OF EXHIBITING EXCELLENT LUBRICATING PERFORMANCE AND WEAR RESISTANCE DURING HIGH-SPEED CUTTING

摘要

PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool having a hard coating layer capable of exhibiting excellent lubricating performance and wear resistance during the high-speed cutting. SOLUTION: In this surface-coated cutting tool, the hard coating layer is vapor-deposited on the surface of a tool base formed of a tungsten carbide-based sintered alloy or a titanium carbonitride based cermet. The hard coating layer vapor-deposited is a (Cr, Al, M) N layer (where M is one or more elements selected from Zr, Y, V, W, Nb, Mo, and Ti). The (Cr, Al, M) N layer is an alternately laminated structure of thin layers A in a cubic structure and thin layers B in a cubic structure and an hexagonal structure which are mixed therein. COPYRIGHT: (C)2009,JPO&INPIT