Effect of rolling methods on microstructure, recrystallization texture and magnetic properties in a Fe-2.5%Si-0.52%Al non-oriented electrical steel

The effect of rolling methods on microstructure, reoystallization texture and magnetic properties in a Fe-2.5%Si0.52%Al non-oriented electrical steel prepared with initial columnar grains is investigated. The results show that warm rolling promotes eta-fiber nucleation and leads to strong eta-fiber reaystallization texture at moderate strain, and the promotion effect is not limited in initial WO) < uvw > grains. At higher rolling strain, the intensity of eta-fiber texture decreases. Warm rolling also promotes deformation bands with high-angle boundary, and the occurrence of deformation bands is explained with the change of active slip system. The highest B-50 value and iron loss lower than 3 W/kg are obtained in 0.5 mm warm rolled sample, corresponding to moderate rolling strain, and X-fiber texture lowers magnetic anisotropy. (C) 2015 Elsevier Inc. All rights reserved.