Based on newly-developed carbide substrates, an optimum relationship between ductility and wear resistance has been achieved. The series includes three PVD-coated carbides and two CVD-coated grades.
The PVD coating here consists of an optimised TiAlCrN with very fine structuring of the layers to create an optimum relationship between ductility and hardness/wear resistance. The CVD coating is based on an MT-TiCN with an alpha-Al2O3 top coat. This layer combination offers not only high wear resistance, but also good thermal stability.
A special post-treatment has been developed for both the PVD and the CVD coating that ensures an extremely smooth surface and, hence, optimum chip flow, so minimising tribochemical wear.
With the CVD coating, the post-treatment additionally sets a selective intrinsic stress in the coating, stabilising the cutting edge or increasing the ductility of the cutting material.
