Coated abrasives

Details Coated abrasives Coated abrasives

C - Chemistry, Metallurgy

09

K

C09K 3/14 (2006.01)

Patent

CA 2553564

A coated super-hard abrasive comprises a core of super-hard abrasive material, which is typically diamond or cBN based, an inner layer of a metal carbide, nitride or carbonitride chemically bonded to an outer surface of the super- hard abrasive material and an outer layer of tungsten physically deposited on the inner layer. The inner layer is preferably a titanium carbide coating in the case of a diamond abrasive core, or a titanium nitride or boride coating in the case of a cBN abrasive core.

L'invention porte sur un abrasif extra-dur comprenant: un corps de matériau abrasif extra-dur, normalement à base de diamant ou de cBN (nitrure de bore cubique); une couche intérieure de carbure, nitrure, borure, ou carbonitrure métallique chimiquement lié à la surface extérieure du matériau abrasif extra-dur; et une couche extérieure de tungstène déposée physiquement sur la couche intérieure. La couche intérieure est de préférence un revêtement de carbure de titane dans le cas d'un corps abrasif en diamant, et de préférence un revêtement de nitrure ou borure de titane dans le cas d'un corps abrasif en cBN.

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