B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
18/500.2
B22F 9/08 (2006.01) B05B 3/02 (2006.01) B22F 9/10 (2006.01) B22F 9/14 (2006.01)
Patent
CA 1077210
ABSTRACT OF THE DISCLOSURE The specification describes a method and apparatus for producing a highly pure metal powder from a rod-shaped metal feed material. The feed material is progressively melted down by heating it with an electron beam in a vacuum. The molten material which is thus formed is temporarily intercepted on a high speed centrifugal plate which throws off particles of the molten material. The material on the centrifugal plate is exposed to the focal spot of an electron beam which has a diameter several times less than the diameter of the plate. The electron beam is controlled and deflected between the centre of rotation and the peripheral edge of the plate result- ing in the focal spot of the beam sweeping a radial zone above the spinning plate. The particles thrown off the plate are then cooled substantially by radiation to the point of solidification. This particular method produces a highly pure metal powder having a precisely defined particle distri- bution that is required for metal coatings and/or the formation of a number of super-alloys.
253079
Aichert Hans
Heimerl Joseph
Stephan Herbert
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