B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 9/04 (2006.01)
Patent
CA 2531683
The method invention relates to a method for the production of metal powder, alloy powder and composite powder having an average particle diameter D50 of no more than 25 ~m from an initial powder having a larger than average particle diameter. The particles of the initial powder are processed in a deformation step in order to form platelet-shaped particles. The ratio of the particle diameter to the particle thickness thereof is between 10: 1 and 1000: 1. The platelet-shaped particles are communited in the presence of a grinding aid, and the metal powder, alloy powder and composite powder is obtained.
Procédé de production de poudres fines métalliques, d'alliage et composées présentant un diamètre moyen des particules D50 de 25 ?m au plus à partir d'une poudre de départ à diamètre moyen des particules plus gros. Les particules de la poudre de départ sont transformées lors d'une étape de déformation en particules sous forme de plaquettes, le rapport du diamètre à l'épaisseur desdites particules allant de 10/1 à 10 000/1. Ces particules en forme de plaquettes sont soumises à un broyage en présence d'un adjuvant de broyage. La présente invention concerne également les poudres métalliques, d'alliage et composées ainsi obtenues.
Fister Dietmar
Ngo-Dinh Lam
Scholl Roland
Spieker Christian
Fetherstonhaugh & Co.
H.c. Starck Gmbh
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