SOFT MAGNETIC IRON CORE MATERIAL AND MANUFACTURING METHOD THEREOF

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PROBLEM TO BE SOLVED : To provide a soft magnetic iron core material that is excellent in soft magnetic performance, is of low core loss, and is of high strength; and a manufacturing method of the same, a motor core, an electrically driven motor, and a vehicle driving power generation motor. SOLUTION : The material is configured by mixing an Fe-based metal-glass powder and rare earth oxide, and is the soft magnetic iron core material of temperature difference ΔTx in the supercooled liquid area of the Fe-based metal-glass powder (ΔTx=Tx-Tg, wherein Tx is a crystallization start temperature, Tg is a glass transition temperature) of 20 K or higher. The Fe-based metal-glass powder is mixed with a solution where a rare earth complex expressed by RL3 is dissolved in an organic solvent, and thermal treatment is performed on the solution while the solution is being deoxidated at the temperature of 150 to 500°C to coat a carbon containing rare earth oxide on the surface. Residual stress is eliminated by performing thermal treatment on the material at a temperature of (Tg-170)K or higher and (Tg)K or lower after the molding process. The motor core 3 is one that the soft magnetic iron core material and a laminate of silicon steel plates are integrally formed. The electrically driven motor is one to which the motor core is applied using the soft magnetic iron core material. The vehicle driving power generation motor is one to which an electric appliance core is applied using the soft magnetic iron core material. COPYRIGHT : (C)2006, JPO&NCIPI