Process for producing low-oxygen metal powder

Details Process for producing low-oxygen metal powder Process for producing low-oxygen metal powder

B - Operations, Transporting

22

F

B22F 1/00 (2006.01) B22F 1/02 (2006.01)

Patent

CA 2648771

A process for producing a low-oxygen metal powder, comprising passing a raw metal powder coated by hot melting of a hydrocarbon organic compound through thermal plasma flame composed mainly of an inert gas so as to reduce the content of oxygen in the raw metal powder. Preferably, the obtained metal powder is subjected to heat treatment in vacuum or hydrogen atmosphere. Preferred example of the hydrocarbon organic compound is stearic acid.

La présente invention concerne un procédé de production de poudre métallique à basse teneur en oxygène, comprenant l'étape consistant à faire passer une poudre métallique brute, enduite par fusion à chaud d'un composé organique d'hydrocarbure, à travers un jet de plasma thermique composé essentiellement d'un gaz inerte, de manière à réduire la teneur en oxygène dans la poudre métallique brute. De préférence, la poudre métallique obtenue est soumise à un traitement thermique sous vide ou dans une atmosphère d'hydrogène. L'exemple préféré du composé organique d'hydrocarbure est l'acide stéarique.

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