State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina

China

State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina

China
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Liu H.-T.,State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina | Schneider J.,Institute For Metallformungtechnical University Bergakademie Freibergbernhard Von Cotta Str 4D 09596 Freiberggermany | Stocker A.,Institute For Metallformungtechnical University Bergakademie Freibergbernhard Von Cotta Str 4D 09596 Freiberggermany | Franke A.,Stahlzentrum Freiberg e.V.D 09599 Freiberg | And 5 more authors.
Steel Research International | Year: 2015

In this article, evolution of microstructure and texture in non-oriented electrical steels along novel strip casting route and conventional route are comparatively investigated in detail. It demonstrates the similar and important role of the microstructure and texture prior to cold rolling to finally obtain desirable recrystallization microstructure and texture in both routes. In both routes, a high intensity of cube-fiber texture and a low intensity of γ-fiber texture can be acquired in hot strips by optimizing the hot rolling and thermal treatment parameters. Accordingly, after cold rolling and annealing, a lower intensity of γ-fiber texture together with a higher intensity of cube-fiber texture, which are favorable for high-permeability materials, can be obtained in both routes. The desired large grain size in the finally annealed materials to obtain low magnetic losses may be gained by choosing appropriate annealing conditions after the first stage of recrystallization. The features of microstructure and texture are similar at comparable stages. The main differences in the regarded different processing routes are in the practical efforts. The detailed results and deeply corresponding discussion on how the microstructure and texture develop during cold rolling and annealing in differently processed samples will be given in the future work. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Liu H.-T.,State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina | Li H.-L.,Institute Of Research Of Iron And Steelshasteelzhangjiagang215625Jiangsup R China | Schneider J.,Institute For Metallformungtechnical University Bergakademie Freibergbernhard Von Cotta Str 4D 09596Freiberggermany | Liu Y.,State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina | Wang G.-D.,State Key Laboratory Of Rolling And Automationnortheastern Universitypo Box 105Shenyang110819ina
Steel Research International | Year: 2016

Low silicon non-oriented electrical steel is produced using a novel strip casting processing route. The focus is on investigating the effects of coiling temperature after hot rolling on microstructure, texture evolution, and magnetic properties. A fine microstructure with weak λ-fiber texture is formed after coiling at 650°C. By contrast, a much coarser microstructure with a much stronger λ-fiber texture is produced after coiling at 750°C. After cold rolling and annealing, a fine and inhomogeneous recrystallization microstructure dominated by mild λ-fiber, α-fiber, and γ-fiber recrystallization texture is formed in the case of coiling at 650°C. By contrast, a coarse and inhomogeneous recrystallization microstructure characterized by strong Goss, α-fiber, and weak λ-fiber together with extremely weak γ-fiber recrystallization texture is formed in the case of coiling at 750°C. Much lower iron loss and higher magnetic induction are obtained in the latter case as a result of the more desirable recrystallization microstructure and texture. It underscores that the relatively higher temperature of coiling has a similar effect as the conventional hot-band normalizing. Hence, the hot-band normalizing might be omitted in the fabrication of high-performance non-oriented electrical steels using this novel and compact strip casting production route. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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