Patent Number: 6,251,508

Title: Grade for cast iron

Abstract: An improved coated cemented carbide insert for the cutting of cast iron is provided. The insert has multi-layer TiCN between the substrate and the .alpha.-Al.sub.2 O.sub.3 coating. The innermost portion of the TiCN layer is composed of large columnar grains while the outermost portion is of small equiaxed grains.

Inventors: Ruppi; Sakari (Fagersta, SE)

Assignee: Seco Tools AB

International Classification: C23C 16/36 (20060101); C23C 30/00 (20060101); B32B 009/00 ()

Expiration Date: 06/26/2018