Importance

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Abstract

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 TiC_x1N_y1, where x1+y1=1, x1≧0, y1>0; at least one layer TiC_x2N_y2O_z2, where x2+y2+z2=1, 0≦z2≦0.03 and 0.5≦x2≦0.85; at least one layer TiN, or TiC_x31N_y31, where 0.2≦x31≦0.8 and x31+y31=1, or TiN_y32B_v32, where 0.0001≦v32≦0.05 and y32+v32=1; at least one layer: TiN_y41B_v41O_z41, where y41+v41+z41=1 and 0.0001≦v41≦0.05 and 0.01≦z41≦0.6, or TiC_x42N_y42O_z42, where x42+y42+z42=1 and 0≦y42≦0.5 and 0.01≦z42≦0.6; and at least one outer layer κ-Al₂O₃. The at least one layer TiC_x2N_y2O_z2 has a texture in the direction having a texture coefficient TC₍₃₁₁₎=1.3.

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First Claim