The Effect of Cryo-Rolling and Annealing on Magnetic Properties in Non-Oriented Electrical Steel

T. Kvačkaj a, P. Bella b, R. Bidulský a, R. Kočiško a, P. Petroušeka, A. Fedoriková a, J. Bidulská a, P. Jandačka c, M. Lupták a, M. Černík d and R. Pernis e aInstitute of Materials, Faculty of Metallurgy, Technical University of Košice, Letná 9, 042 00 Košice, Slovakia bŽP VVC s.r.o., Kolkáreň 35, 976 81, Podbrezová, Slovakia cInstitute of Physics, VSB-Technical University of Ostrava, 17.listopadu 15/2172, 70833 Ostrava, Czech Republic dU.S. Steel Košice, s.r.o., Research and Technology Center, Vstupný areál U.S.Steel, 044 54, Košice, Slovakia eAlexander Dubček University of Trenčín, Pri Parku 19, Trenčín-Záblatie, Slovakia

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The goal of the present work is to compare progressive technology - rolling at cryogenic temperature and classical rolling at ambient temperature followed by an investigation of their impact on the final microstructure and the magnetic properties of non-oriented electrical steel. Non-oriented electrical steel is characterized by high magnetic induction, low magnetic losses, and low coercivity. The best magnetic properties are achieved using preferable texture and optimal grain size. In this paper there is analyzed the percentage of different textural components after cryo-rolling and after rolling at ambient temperature. To obtain maps of inverse pole figures, the electron backscatter diffraction method was used. The main contribution of this study was that the samples rolled at cryo conditions and after final annealing reached better magnetic properties than at ambient temperature, which was reflected by low magnetic losses and coercivity.

DOI: 10.12693/APhysPolA.131.1105 PACS numbers: 75.50.Bb, 81.05.Bx, 81.40.Rs, 81.40.Ef