| 摘要 |
The present invention relates to a cutting tool, e.g. carbide insert, solid carbide drill or mill or carbide tip, particularly for milling of steels, stainless steel, HRSA, titanium or any alloyed material from any of these groups, comprising a cemented carbide substrate and an aperiodic multilayer coating with: -a substrate of cemented carbide having a composition of 10% Co, 0.39% Cr and balance tungsten carbide -and a coating which is essentially an aperiodic multilayer consisting of layers A+B+A+B+... where the sublayers A and B consist of Al x Ti 1-x N and Ti y Al 1-y N respectively. The typical average thickness of each A+B sequence is in the range 30-300 nm and the total thickness of the coating in the range 0.5-20 µm. The total chemical composition averaged over the whole coating consists of Ti z Al 1-z N where z lies in the range 0.40-0.70. |
