| 摘要 |
PURPOSE:To prevent the deterioration of iron loss due to building factor by a method wherein, after a local crystal region or a linear local distortion region have been formed on the amorphous alloy thin band of specific composition, a distortion-removing process and the like is performed, and its tensile force is introduced into a wound core after a coil has been wound around thereon. CONSTITUTION:A linear local distortion region or a local crystal region is provided in the direction crossing with the longitudinal direction on one side of the amorphous alloy thin band having the component composition of Fe of 75- 83atom%, B of 8-16atom% and Si of 0-10atom% leaving an interval of 5.0- 20mm.. Said thin band is processed on a wound core, and after a distortion-removing annealing has been performed, tensile force of 1.5-3.5kg/mm.<2> is introduced into the wound core C. For example, a scratch-introduced thin band is formed into the shape of the core C, and after a distortion-removing annealing has been performed at 350 deg.C for one hour, the primary and secondary coils (f) and (s) are wound around, and circumferential force is applied on said wound transformer using a pair of metal snaps 1 and 2 and a spring 3. |
