Cemented carbide body with increased wear resistance

USRE41646E1 · kind E1 · reissue

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Ake Ostlund · Stuvsta-Snättringe, SE
• Mats Waldenstrom · Bromma, SE
• Ove Alm · Åtvidaberg, SE

Key dates

• Filing date: Jul 8, 1997
• Grant date: Sep 7, 2010
• Expiry date: Jul 8, 2017

Classification

• Technology area (CPC —): General

Abstract

As there is disclosed a cemented carbide body comprising WC with an average grain size of <10 μm in a binder phase. In the cemented carbide body the WC grains can be classified in at least two groups in which a group of smaller grains has a maximum grain size amax and a group of larger grains has a minimum grain size bmin and each group contains at least 10 % of the total amount of WC grains. According to the invention bmin−amax>0.5 μm and the difference in grain size within each group is >1 μm.