MANUFACTURING METHOD OF Fe-BASED NANOCRYSTAL ALLOY

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PROBLEM TO BE SOLVED : To provide a manufacturing method of Fe-based nanocrystal alloy suppressing coarsening of crystal and deposition of a compound and having excellent magnetic property. SOLUTION : An Fe-based amorphous thin band 1 fed from a rolling feed roll 2 is heated with moving in an induction heating deice 4 arranged with a heating coil 3 and set at a predetermined temperature. The heat treated Fe-based amorphous thin band 1 is wound by a roll receiving roll 5 and a first heat treatment process is completed. Then it is processed to a magnetic core shape depending on needs, and a re-heating treatment is conducted in a second heat treatment process. Also saturated magnetic flux density after the first heat treatment process Bs1 is set smaller than saturated magnetic flux density after the second heat treatment process Bs2. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2016, JPO&INPIT