Method of making a cemented carbide or cermet body

US9777349B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Carl-Johan Maderud · Stockholm, SE
• Tommy Flygare · Stockholm, SE
• Michael Carpenter · Kenilworth, GB
• Jane Smith · Sarnia, CA

Key dates

• Filing date: Oct 17, 2012
• Grant date: Oct 3, 2017
• Expiry date: Sep 7, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2202/01
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention relates to a method of making a cemented carbide or a cermet body comprising the steps of first forming a powder blend comprising powders forming hard constituents and metal binder. The powder blend is then subjected to a mixing operation using a non-contact mixer wherein acoustic waves achieving resonance conditions to form a mixed powder blend and then subjecting said mixed powder blend to a pressing and sintering operation. The method makes it possible to maintain the grain size, the grain size distribution and the morphology of the WC grains.