Coated cemented carbide inserts

摘要

The present invention relates to a cutting insert for parting and grooving in heat resistant super alloys and stainless steels comprising a substrate and a coating. The substrate comprises of from about 5 to about 7 wt-% Co and from about 0.15 to about 0.60 wt-% TaC and from about 0.10 to about 0.50 wt-% NbC and balance WC. The coating comprises a homogeneous Al_xTi_1-xN-layer with x=from about 0.6 to about 0.7 and a thickness of from about 1 to about 3.8 mum.