MANUFACTURING METHOD OF RARE EARTH MAGNET

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PROBLEM TO BE SOLVED : To provide a manufacturing method of a rare earth magnet, achieving good wettability of a lubricant (lubricating liquid) relative to a sintered body in manufacturing a rare earth magnet by attaching the lubricant (lubricating liquid) to the sintered body to perform hot plasticity processing. SOLUTION : A manufacturing method of a rare earth magnet includes : a first step of coating a mold release agent R containing a solid lubricant on an inner face of a mold M, housing powder for a magnet in the mold M, and compression-molding and sintering the powder to manufacture a sintered body S; and a second step of immersing the sintered body S into a lubricating liquid L that contains a solid lubricant, attaching the solid lubricant on the surface of the sintered body S while applying supersonic vibration, and subjecting the sintered body S to hot plasticity processing to manufacture a rare earth magnet. SELECTED DRAWING : Figure 2 COPYRIGHT : (C)2017, JPO&INPIT