| 摘要 |
The production of a magnetic component from a nanocrystalline iron based soft magnetic alloy of composition (in at. %) ≥ 60 % Fe, 0.1-3 % Cu, 0-25 % B, 0-30 (preferably ≤ 14) % Si, 0.1-30 % one or more of Nb, W, Ta, Zr, high-frequency, Ti and Mo and balance impurities, the sum of Si + B being 5-30 %, involves producing a toroidal preform by winding an amorphous strip of the alloy around a mandrel and carrying out one or more crystallisation anneal processes at 500-600 degrees C for 0.1-10 hrs. to form nanocrystals. The novelty comprises carrying out a relaxation heat treatment at below the crystallisation start temperature prior to crystallisation annealing. |
