CUTTING TOOL FOR PROCESSING METAL MATERIALS

摘要

A cutting tool for metal material processing has a hard metal body and a multi-layer coating applied to the hard metal body in at least one surface area. The multi-layer coating includes the following, sequentially in direction from the hard metal body to the surface of the cutting tool: at least one layer TiCx1Ny1, where x1+y1=1, x1≧0, y1>0; at least one layer TiCx2Ny2Oz2, where x2+y2+z2=1, 0≦̸z2≦̸0.03 and 0.5≦̸x2≦̸0.85; at least one layer TiN, or TiCx31Ny31, where 0.2≦̸x31≦̸0.8 and x31+y31=1, or TiNy32Bv32, where 0.0001≦̸v32≦̸0.05 and y32+v32=1; at least one layer: TiNy41Bv41Oz41, where y41+v41+z41=1 and 0.0001≦̸v41≦̸0.05 and 0.01≦̸z41≦̸0.6, or TiCx42Ny42Oz42, where x42+y42+z42=1 and 0≦̸y42≦̸0.5 and 0.01≦̸z42≦̸0.6; and at least one outer layer &kgr;-Al2O3. The at least one layer TiCx2Ny2Oz2 has a texture in the direction having a texture coefficient TC(311)=1.3.