Process for producing magnetic core of nanocrystalline magnetically soft material

摘要

In the present invention, there is disclosed a process for manufacturing at least one magnetic core made of an iron-based soft magnetic alloy having a nanocrystalline structure, wherein an amorphous ribbon is manufactured from the magnetic alloy, the annealing temperature Tm which, in the case of the ribbon, leads to maximum magnetic permeability, is determined, at least one core blank is manufactured from the ribbon and at least one core blank is subjected to at least one annealing operation, said annealing being carried out at a temperature T of between Tm + 10 degC and Tm + 50 degC for a temperature hold time t of between 0.1 and 10 hours so as to cause nanocrystals to form.