| 摘要 |
The invention provides a method for manufacturing a soft magnetic material, wherein an Fe-Si alloy powder is heated in a weakly oxidizing atmosphere to form a SiO<SUB>2 </SUB>oxide film on the surface, and the powder is then press-molded and fired in a weakly oxidizing atmosphere to obtain a sintered product. By performing the surface oxidizing step in a weakly oxidizing atmosphere such as water vapor, Si is selectively oxidized to form a thin oxide film with high electrical resistance. Furthermore, by firing the molded product in a weakly oxidizing atmosphere, the sintering can be performed while the oxide film, in which cracks and the like are generated at the press-molding, is repaired.
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