CEMENTED CARBIDE-MADE CUTTING TOOL WITH SURFACE CLAD OF WHICH CLAD LAYER FOR WEAR RESISTANCE IS EXERTING EXCELLENT CHIPPING RESISTANCE PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a cemented carbide-made cutting tool with a surface clad of which the clad layer for wear resistance is exerting excellent chipping resistance property. ;SOLUTION: The cemented carbide-made cutting tool with the surface clad is made by physically and vaporously depositing the clad layer for the wear resistance comprised of (a)-(c) below, (a) a lower side hard layer comprising a single layer made of either the composite nitride layer of Ti and Al having a formula: (Ti_1-XAlX)N and the same (Ti_1-XAlX)C_1-YNY or the composite carbo- nitride layer of Ti and Al, or double layers made of both of them, (b) an intermediately adherent layer comprising a single layer made of either the composite carbo-oxide layer or the composite carbo-nitro-oxide layer having the formula: (Ti_1-aAl_a)C_1-cO_c and the same (Ti_1-aAl_a)C_1-(b+c)N_bO_c, of Ti and Al or the double- layers made of both of them, (c) an upper side hard layer comprising an aluminum oxide layer on the surface in the basic body of the tool.;COPYRIGHT: (C)2003,JPO