Method of separating admixed contaminants from superalloy...

C - Chemistry – Metallurgy – 22 – C

Patent

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C22C 1/10 (2006.01)

Patent

CA 2553036

A method is provided for separating superalloy metal powder from contaminants, such as process-produced contaminants, by enhancing the magnetic properties thereof in a carburizing atmosphere followed by magnetic separation of the contaminants from the superalloy metal powder to thereby enhance the concentration of the contaminants. Heating or mechanical agitation or both are employed to resist agglomeration of the metal powder before magnetic separation thereof from the contaminants. Certain preferred times and temperatures are disclosed.

L'invention concerne un procédé pour séparer des contaminants, par exemple des contaminants formés au cours du procédé de production, présents dans une poudre métallique de superalliage, par renforcement des propriétés magnétiques de la poudre dans une atmosphère de cémentation, puis par séparation magnétique des contaminants contenus dans la poudre métallique de superalliage pour augmenter ainsi la concentration des contaminants. Selon ce procédé, on fait appel à un chauffage et/ou à une agitation mécanique pour lutter contre l'agglomération de la poudre métallique avant sa séparation magnétique des contaminants. Certaines durées et températures de chauffage préférées sont décrites.

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