Cemented carbide body with increased wear resistance

US6210632A · kind A · utility

Assignee

• SANDVIK AB · SE

Inventors

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

Key dates

• Filing date: Apr 1, 1999
• Grant date: Apr 3, 2001
• Expiry date: Apr 1, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

As there is disclosed a cemented carbide body comprising WC with an average grain size of <10 .mu.m 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 a.sub.max and a group of larger grains has a minimum grain size b.sub.min and each group contains at least 10 % of the total amount of WC grains. According to the invention b.sub.min -a.sub.max >0.5 .mu.m and the difference in grain size within each group is >1 .mu.m.