Patent ID: 8828563

Claim:
A cutting tool for machining metallic materials, comprising: a hard metal body and a multilayer coating applied to said hard metal body in at least one surface region thereof; said multilayer coating comprising the following layers in a direction from said hard metal body to a surface of the cutting tool: at least one layer TiC x1 N y1 , where x 1 +y 1 =1, x 1 ≧0, y 1 >0; at least one layer TiC x2 N y2 O z2 , where x 2 +y 2 +z 2 =1, 0≦z 2 ≦0.03 and 0.5≦x 2 ≦0.85, said at least one layer TiC x2 N y2 O z2 having a texturing in a (311) direction with a texture coefficient TC (311) ≧1.3 and comprising plate-like, columnar crystals, wherein 0.01≦z 2 ≦0.02; at least one layer: TiN, or TiC x31 N y31 , where 0.2≦x 31 ≦0.8 and x 31 +y 31 =1, or TiN y32 B v32 , where 0.0001≦v 32 ≦0.05 and y 32 +v 32 =1; at least one layer: TiN y41 B v41 O z41 , where y 41 +v 41 +z 41 =1 and 0.0001≦v 41 ≦0.05 and 0.01≦z 41 ≦0.6, or TiC x42 N y42 O z42 , where x 42 +y 42 +z 42 =1 and 0≦y 42 ≦0.5 and 0.01 ≦z 42 ≦0.6; and at least one outer layer κ-Al 2 O 3 .