Super-hard structure, tool element and method of making same
AssigneeElement Six Limited
InventorsStig Ake Andersin, Bernd Heinrich Ries, Frank Friedrich Lachmann, Lars-Ivar Nilsson
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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.
Claims27
A method for making a treated super-hard structure, the method including providing a super-hard structure comprising polycrystalline cubic boron nitride (PCBN) material joined to a substrate comprising cemented carbide 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 5 minutes to produce the treated super-hard structure.
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