Method of preparing pressable powders of a transition metal...

B - Operations – Transporting – 22 – F

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B22F 3/16 (2006.01) C22C 1/05 (2006.01) C22C 1/10 (2006.01)

Patent

CA 2314941

A pressable powder is formed by a method comprising [I] mixing, in essentially deoxygenated water, [A] a first powder selected from the group consisting of a transition metal carbide and transition metal with [B] an additional component selected from the group consisting of (i) a second powder comprised of a transition metal carbide, transition metal or mixture thereof, (ii) an organic binder and (iii) combination thereof and [II] drying the mixed mixture to form the pressable powder, wherein the second powder is chemically different than the first powder. The pressable powder may then be formed into a shaped part and subsequently densified into a densified part, such as a cemented tungsten carbide.

Une poudre comprimable est formée par un procédé consistant (I) à mélanger, dans de l'eau essentiellement désoxygénée, (A) une première poudre sélectionnée dans le groupe comprenant un carbure de métal de transition et un métal de transition avec (B) un constituant additionnel choisi dans le groupe comprenant (i) une seconde poudre composée d'un carbure de métal de transition, d'un métal de transition ou d'un mélange de ceux-ci, (ii) un liant organique et (iii) une combinaison de ceux-ci, et (II) à sécher le mélange mélangé pour former la poudre comprimable, la seconde poudre étant chimiquement différente de la première poudre. La poudre comprimable peut ensuite être transformée en une pièce façonnée et ensuite densifiée en une pièce densifiée, telle qu'un carbure de tungstène fritté.

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