CEMENTED CARBIDE-MADE CUTTING TOOL WITH SURFACE CLAD WHOSE RIGID CLAD LAYER EXERTS EXCELLENT WEAR RESISTANCE IN HIGH VELOCITY CUTTING MACHINING

摘要

PROBLEM TO BE SOLVED: To provide a cemented carbide-made cutting tool with a surface clad whose rigid clad layer exerts excellent wear resistance in high velocity cutting machining.;SOLUTION: The cemented carbide-made cutting tool with the surface clad is made by physical-vapor-depositing the rigid clad layer comprising the layer composite nitride of Ti and Al showing the same result as (a), [(a) having an average layer thickness of 0.05-0.5 μm, by satisfying a composition formula: (Ti_1-XAlX)N (wherein, X shows 0.05-0.25 by atomic ratio)], furthermore, (b) having the average layer thickness of 2-10 μm via the layer of crystal orientation hysteresis comprising the layer of Ti grouped composite nitride showing an X-ray diffraction pattern in which a maximum peak is forced to appear on a (200) surface by the measurement of a rake face and a flank in a cutting edge by the X-ray diffractometer using the α-ray of CU-K and the half-valve width of the above maximum peak is less than 0.4 degrees by 2, and by satisfying the composition formula: (Ti_1-YAlY)N (wherein, Y shows 0.4-0.7 by atomic ratio) on the surface of the basic body of tungsten carbide grouped cemented carbide or the basic body of titanium carbonitride based cermet.;COPYRIGHT: (C)2003,JPO