| 简介 |
PROBLEM TO BE SOLVED : To provide a manufacturing method of a magnet capable of suppressing cost increase and obtaining high remanent magnetic flux density without using a bond and the magnet.
SOLUTION : The manufacturing method of a magnet includes : a step S1 for preparing a mixed powder of a magnetic powder of a hard magnetic body composed of one or more kinds of Fe-N based compound and R-Fe-N based compound (R : a rare earth element) and a lubricant for forming an adsorption film on a surface of the magnetic powder; a step S3 for forming an adsorption film of the lubricant on the surface of the magnetic powder by heating the mixed powder at a temperature higher than or equal to a melting point T3 of the lubricant and less than a decomposition temperature of the magnetic powder; a step S4 for obtaining a primary molding by pressure molding the magnetic powder; and a step S5 for heating the primary molding at a temperature less than the decomposition temperature of the magnetic powder.
SELECTED DRAWING : Figure 1
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