Cemented carbide insert

USRE40962E1 · kind E1 · reissue

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Anders Lenander · Tyresö, SE
• Mikael Lindholm · Kalmar, SE

Key dates

• Filing date: Jul 10, 2006
• Grant date: Nov 10, 2009
• Expiry date: Jul 10, 2026

Classification

• Technology area (CPC —): General

Abstract

Methods of making a coated cemented carbide body include: forming a powder mixture having WC, 5-12 wt % Co, 3-11% cubic carbides of Ta and Ti with a ratio of Ta/Ti is 1.0-4.0; adding N in an amount of 0.6-2.0% of the weight of Ta and Ti; milling and spray-drying the mixture to form a powder; compacting and sintering the powder at a temperature of 1300-1500° C., in a controlled atmosphere of about 50 mbar followed by cooling, whereby a body having a binder phase enriched and essentially gamma-phase free surface zone of 5-50 μm in thickness is obtained; applying a pre-coating treatment to the body; and appling a hard, wear-resistant coating to the body.