| 简介 |
PROBLEM TO BE SOLVED : To provide a method for raising the heat transfer rate of a cast lump from a casting mold surface to the inner wall surface of a casting mold when a rare earth alloy or particularly an alloy for an R-T-B magnet is manufactured by a centrifugal casting method and to thereby manufacture the alloy for the R-T-B magnet having microcrystalline grains which have not heretofore been. SOLUTION : The method for manufacturing a rare earth alloy by a centrifugal casting method comprises a step of mounting a film having a small thermal conductivity than that of a casting mold material on the inner wall surface of a cylindrical casting mold. The thermal conductivity of the film is 80 W/mK or less. COPYRIGHT : (C)2004, JPO |
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