Thin Fe 3wt.% Si doubly oriented magnetic sheets for medium power devices

For high speed rotating machines, the use of doubly oriented thin Fe 3% Si sheets with high permeabilities in the rolling and in the transverse directions should allow high working induction with low iron losses to be reached. As proposed by Kolher, commercial G.O. sheets were submitted to a double stage process so as to obtain{100}<001> oriented thin (0.04 mm) sheets. The sensitivity of different process parameters on the final cube texture perfection was reported. Moreover, a single stage process was developed and allowed us to obtain a roughly (100)[001] oriented sheet (0.08 mm in thickness). As a general view this paper shows that specific combinations of rolling and annealing applied to G.O. sheets may develop very marked textures in thin sheets promoting favourable 2D magnetic performances