METHOD FOR MANUFACTURING Fe-Co SOFT MAGNETIC SINTERED ALLOY HAVING STRUCTURE CONTAINING METAL NITRID

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PROBLEM TO BE SOLVED : To provide a method for manufacturing an Fe-Co soft magnetic sintered alloy having a structure containing a metal nitride in boundaries among the alloy particles.SOLUTION : This manufacturing method comprises adding the powder of a hydride of a rare earth element including Y, Al, Li, Ca, Sr and Mg to the powder of an Fe-Co soft magnetic alloy, pulverizing and mixing them to prepare a mixed powder, compacting the obtained mixed powder to produce a compact, sintering the obtained compact at 900 to 1, 300°C in a non-oxidative atmosphere to produce a sintered compact, and nitriding the obtained sintered compact in a heating condition of 500 to 1, 000°C in nitrogen atmosphere.