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METHOD FOR PRODUCING ALLOY PIECE FOR RARE EARTH MAGNET AND ALLOY PIECE FOR RARE EARTH MAGNET PRODUCED THEREBY
METHOD FOR PRODUCING ALLOY PIECE FOR RARE EARTH MAGNET AND ALLOY PIECE FOR RARE EARTH MAGNET PRODUCED THEREBY
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机译:稀土磁体合金零件的生产方法及其所生产的稀土磁体合金零件
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摘要
Provided is a method for producing an alloy piece for a rare earth magnet by feeding a molten alloy to an outer peripheral surface of a cooling roll (3) and solidifying the same to cast an ingot (4) and then breaking the ingot (4), wherein subjecting the outer peripheral surface of the cooling roll (3) to a blast treatment and removing adhered matter from the outer peripheral surface of the cooling roll (3) makes it possible to reduce a variance in the crystal structure in the resulting alloy piece. Preferably, a projecting material that has a median diameter D50 of 3.0 mm or lower and includes one or more types from among a metallic projecting material, non-metallic projecting material, and a resin-based projecting material is used as a projecting material when implementing the blast treatment. Also, preferably, the discharge pressure is 0.10-1.00 MPa when implementing the blast treatment.
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