Methods and systems for compaction of powders in forming...

B - Operations – Transporting – 22 – F

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B22F 7/06 (2006.01) C22C 26/00 (2006.01) C22C 29/00 (2006.01) E21B 10/46 (2006.01)

Patent

CA 2672704

Methods for forming bodies of earth-boring drill bits and other tools include milling a plurality of hard particles and a plurality of particles comprising a matrix material to form a mill product comprising powder particles, separating the particles into a plurality of particle size fractions. Some of the particles from the fractions may be combined to form a powder mixture, which may be pressed to form a green body. Additional methods include mixing a plurality of hard particles and a plurality of particles comprising a matrix material to form a powder mixture, and pressing the powder mixture with pressure having an oscillating magnitude to form a green body. In yet additional methods a powder mixture may be pressed within a deformable container to form a green body and drainage of liquid from the container is enabled as the powder mixture is pressed.

L'invention concerne des procédés permettant de former des corps de forets pour forage dans le sol et d'autres outils, lesdits procédés consistant à broyer une pluralité de particules dures et une pluralité de particules comprenant un matériau matriciel pour constituer un produit de broyage comprenant des particules de poudre, séparant les particules en une pluralité de fractions de taille de particules. Certaines des particules provenant des fractions peuvent se combiner pour constituer un mélange de poudre, qui peut être comprimé pour obtenir un corps vert. Des procédés supplémentaires consistent à mélanger une pluralité de particules dures et une pluralité de particules comprenant un matériau matriciel pour constituer un mélange de poudre, et à comprimer le mélange de poudre sous pression avec une grandeur oscillante pour constituer un corps vert. Dans d'autres procédés supplémentaires un mélange de poudre peut être comprimé dans un contenant déformable pour constituer un corps vert et permettre le drainage de liquide du contenant pendant la compression du mélange de poudre.

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