Coated cutting insert

US5942318A · kind A · utility

Assignee

• SANDVIK AB · SE

Inventors

• Staffan Soderberg · Stockholm, SE
• Åsa Kutscher · Alvesta, SE
• Leif kesson · Alvesta, SE

Key dates

• Filing date: Jul 1, 1997
• Grant date: Aug 24, 1999
• Expiry date: Jul 1, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

There is provided a coated cutting insert particularly useful for finishing operations in milling of grey cast iron. The insert has a fine-grained WC-Co cemented carbide body and a coating of multiple layers of TiC.sub.x N.sub.y deposited at conditions aiming to minimize the decarburization of the cutting edge without any negative effects on the substrate. There is also disclosed a method of applying a TiC.sub.x N.sub.y layer by CVD technique on a cemented carbide cutting insert without eta phase formation and without etching of the binder phase.