Method of making cemented carbide with binder phase enriched surface zone

US6299992A · kind A · utility

Assignee

• SANDVIK AB · SE

Inventors

• Per Lindskog · Alvesta, SE
• Per Gustafson · Huddinge, SE

Key dates

• Filing date: Aug 25, 1999
• Grant date: Oct 9, 2001
• Expiry date: Aug 25, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12056
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention relates to method of making a cemented carbide insert, comprising a cemented carbide substrate and a coating. The substrate contains WC and cubic carbonitride phase in a binder phase based of Co and/or Ni and has a binder phase enriched surface zone essentially free of cubic phase. The binder phase enriched surface zone prevails over the edge. By sintering in an atmosphere essentially consisting of nitrogen the thickness of the binder phase enriched zone can be controlled.