Method for the obtaining cost effective powder
AssigneeInnomaq 21, S.L.
InventorIsaac Valls Anglés
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Abstract
A production method of particulate materials, through centrifugal atomization (CA) is disclosed. The method is suitable for obtaining fine spherical powders with exceptional morphological quality and extremely low content, or even absence of non-spherical-shape particles and internal voids. A appropriate cost effective method for industrial scale production of metal, alloy, intermetallic, metal matrix composite or metal like material powders in large batches is also disclosed. The atomization technique can be extended to other than the centrifugal atomization with rotating element techniques.
Claims20
A method for producing metal-based alloy powders by means of centrifugal atomization in a closed chamber comprising the steps of:
- a) providing a composition comprising at least one metal,
- b) melting the composition, and
- c) atomizing the molten composition by means of centrifugal atomization with an atomizing disk,
- wherein the atmosphere in the closed atomization chamber is pressurized and/or cooled and wherein PA2 is between 4500000 and 70000000, wherein PA2=K1*PA1+K2*P, being P the absolute pressure in the atomization chamber in Pa, and PA1=ρ*N2*d2, wherein ρ is the density of the composition to be atomized at their melting point under 1 bar absolute pressure measured in kg/m3, N is the rotating speed of the atomizing disk in rad/s and d is the diameter of the atomizing disk in m, and K1=0.0033 in 1/Pa and K2=22 in 1/Pa.
Dependencies are inferred from the claim text.