Super-hard enhanced hard-metals

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 26/00 (2006.01) C22C 29/02 (2006.01)

Patent

CA 2713595

The present invention relates to a super-hard enhanced hard-metal comprising particulate hard material and a binder and at least one formation, the formation comprising a core cluster and a plurality of satellite clusters, spaced from, surrounding and smaller than the core cluster, and the core cluster and satellite clusters each comprising a plurality of contiguous per- hard particles. The invention further relates to a method for making a super- hard enhanced hard-metal, the method including forming a green body comprising super-hard particles, particles of a hard material and at least one binder material or material that is capable of being converted into a binder material; subjecting the green body to a temperature of at least 500 degrees centigrade and a pressure at which the super-hard material is not thermodynamically stable to form a sintered body; and subjecting the sintered body to a pressure and temperature at which the super-hard material is thermodynamically stable and to inserts for tools comprising the enhanced hard-metal.

La présente invention concerne un métal dur amélioré ultradur comprenant un matériau dur particulaire et un liant et au moins une formation, la formation comprenant un agrégat de noyau et une pluralité de grappes de satellites, espacées de, entourant et plus petites que lagrégat de noyau, et lagrégat de noyau et les grappes de satellites comprenant chacun une pluralité de particules ultradures contiguës. Linvention concerne en outre un procédé de fabrication dun métal dur amélioré ultradur, le procédé comprenant la formation dun corps vert comprenant des particules ultradures, des particules dun matériau dur et au moins un matériau de liant ou un matériau qui est capable dêtre converti en un matériau de liant ; la soumission du corps vert à une température dau moins 500 degrés Celsius et à une pression à laquelle le matériau ultradur nest pas thermodynamiquement stable pour former un corps fritté ; et la soumission du corps fritté à une pression et à une température auxquelles le matériau ultradur est thermodynamiquement stable et à des ensembles de matrice pour des outils comprenant le métal dur amélioré.

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