| 摘要 |
PURPOSE:To obtain metallic powder having the irregular shapes suitable as a raw material for powder metallurgy in a centrifugal atomization method by bringing the metallic powder right after atomization into contact with a colliding object. CONSTITUTION:A powder raw material consisting of an active metal, etc. is melted in a melting furnace 2 in a vessel in which a non-oxidative atmosphere is maintained to form a molten metal 5. While a rotating body 9 is kept rotated at a high speed, the furnace 2 is tilted to pour the metal 5 into a tundish 6. The metal 5 flows out in the form of molten metal flow 8 through the opening in the bottom of the tundish 6 and falls onto the molten metal receiving surface of the body 9. The flow 8 is then spread on the molten metal receiving surface by centrifugal force and is detached therefrom after flowing in the form of a thin film. The divided and scattered metal collide against a colliding object 13 by which the metal is deformed or crushed to have irregular shapes and thereafter the metal is accumulated as powder 14 in the bottom of the vessel.
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