Patent ID: 7923101
Filing Date: 2011-04-12
Classification: B22F,C22C,C23C,Y10T

Abstract:
1. A cutting tool insert comprising a cemented carbide body and a coating; wherein the cemented carbide body comprises: WC; about 4-12 wt-% Co; and about 5-10 wt-% cubic carbides of at least one metal selected from the group consisting of groups IVb, Vb and VIb of the periodic table; wherein the cemented carbide body has an S-value of about 0.79-0.90 and a coercivity of about 9-18 kA/m; wherein at least one surface of the cemented carbide body comprises a binder phase enriched surface zone having a thickness of about 5-50 μm and being essentially free from cubic carbides adjacent the coating; wherein the coating comprises at least one α-Al where: