| 摘要 |
PURPOSE:To obtain the wound core of low cost having an equal squareness ratio and small coercive force by a method wherein the squareness ratio of the D.C. hysteresis curve of the thin belt of an alloy to be indicated by the prescribed compositional formula is set at the value of the prescribed ratio or above it. CONSTITUTION:The square ratio of Fe amorphous alloy thin belt having the composition as indicated by the formula is brought up to 85% or above by performing an annealing and cooling in a magnetic field. Said thin belt is wound in toroidal form and made to a wound core. Particularly in the formula, the thin film which satisfied the condition of 13<=b<=19.8<=c<=10 in the formula has a high temperature of crystallization, and the annealing at a high temperature performed in a magnetic field can be performed, thereby enabling to obtain the wound core of a high squareness ratio. |
