Dual-phase hard material, method for the production thereof...

Details Dual-phase hard material, method for the production thereof... Dual-phase hard material, method for the production thereof...

C - Chemistry, Metallurgy

01

B

C01B 31/34 (2006.01) C04B 35/628 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2546617

The invention relates to tungsten carbide powder consisting of powder particles, which have a core comprised of tungsten cast carbide and a covering comprised of tungsten monocarbide, to the production thereof by heating a tungsten cast carbide powder in the presence of a carbon source to a temperature ranging from 1300 to 2000 ~C, and to the use thereof for coating surfaces of parts subjected to wear and for producing drill bits.

L'invention concerne de la poudre de carbure de tungstène à base de particules pulvérulentes qui présentent un noyau en carbure fondu de tungstène et une enveloppe en monocarbure de tungstène, ainsi que sa production par chauffage d'une poudre de carbure fondu de tungstène en présence d'une source de carbone, pour la porter à une température de l'ordre de 1300 à 2000 ·C. L'invention concerne également l'utilisation de ladite poudre dans le revêtement superficiel d'éléments sujets à l'usure et dans la production de couronnes de sondage.

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