PRODUCTION OF METALLIC POWDER

摘要

PURPOSE:To produce uniform and fine metallic powder by dropping molten metal flow onto a high speed rotating surface in a vacuum or non-oxidative atmosphere to splash the molten metal and further bringing the molten metal into collision against an outside wall provided above the rotating surface on the outside circumference thereof. CONSTITUTION:A metal in a vessel 1 in the vacuum or non-oxidative atmosphere is melted in a high-frequency heating furnace 2 and the molten metal 3 is admitted into a tundish 4. The molten metal is dropped from an aperture 9 in the base of the tundish 4 and is allowed to collide against the smooth surface of a rotating body 5 rotating at a high speed. The molten metal is made into unsolidified fine particles 7 by centrifugal force without sticking to the smooth high speed rotating surface and the particles further collide against the smooth surface of the outside peripheral wall 11 erected at 90-135 deg. angle with respect to the collision surface of the rotating body. The particles are thus splashed and solidified as the metallic powder 8 having the extremely fine and uniform grain size. Such powder accumulates on the bottom 12 of the vessel 1.