| 简介 |
PROBLEM TO BE SOLVED : To provide an apparatus for producing alloy flakes, in which long-time heat treatment (slow cooling treatment) is uniformly applied to the alloy flakes immediately after being produced by ingot crushing; and to provide a method for producing alloy flakes for a raw material of rare-earth magnet using the apparatus.
SOLUTION : An apparatus 1 for producing alloy flakes includes : crystallinity control means 2 for controlling a crystal structure of alloy flakes to a desired state; cooling means 3 for cooling the alloy flakes discharged from the crystallinity control means 2; and a chamber for keeping them under reduced pressure or under an inert gas atmosphere. The crystallinity control menas 2 has : a rotary heating drum 21 in a cylindrical shape, for heating the fed alloy flakes; and switching means 23 for switching between storage and discharge of the alloy flakes fed to an inner wall side of the heating drum 21. Thus long-time heat treatment is uniformly applied to the alloy flakes immediately after being produced by ingot crushing. The heating drum 21 has a scooping blade plate 22 for scooping up the alloy flakes fed to the inner wall side with its rotation.
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