Super-hard structure, tool element and method of making same

US8961719B2 · kind B2 · utility

Assignee

• Element Six Limited · IE

Inventors

• Stig Ake Andersin · Church Hanborough, GB
• Bernd Heinrich Ries · Hünfeld, DE
• Frank Friedrich Lachmann · Hünfeld, DE
• Lars-Ivar Nilsson · Robertsfors, SE

Key dates

• Filing date: May 25, 2012
• Grant date: Feb 24, 2015
• Expiry date: May 25, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2237/706
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for making a treated super-hard structure, the method including providing a super-hard structure comprising super-hard material selected from polycrystalline cubic boron nitride (PCBN) material or thermally stable polycrystalline diamond (PCD) material; subjecting the super-hard structure to heat treatment at a treatment temperature of greater than 700 degrees centigrade at a treatment pressure at which the super-hard material is not thermodynamically stable, for a treatment period of at least about 5 minutes to produce the treated super-hard structure.