Texture evolution during inclined cold rolling of used non‐oriented silicon steel

• Published in: Materialwissenschaft und Werkstofftechnik 2020-08, Vol.51 (8), p.1058-1074
• Main Authors: Song, S., Liu, T., Hu, M.
• Format: Article
• Language: English
• Subjects: Cold rolling; Deformation; eins/zwei schräges Kaltwalzen; Grain boundaries; Grain size; Inclination angle; intermediate annealing; Magnetic induction; Magnetic properties; magnetische Induktion; one/two inclined cold rolling; Silicon steels; Textur; Texture; Used non-oriented silicon steel; Wiederverwendeter nichtorientierter Silizium-Stahl; Zwischenglühen
• ISSN: 0933-5137; 1521-4052
• DOI: 10.1002/mawe.201900228

With the objective of optimizing the texture components and exploring a method to improve the magnetic properties of used silicon steel, the methods of one inclined rolling and two inclined rolling were applied. The result shows: the new Goss grains were nucleated except at {111} deformed grains, and also formed at the grain boundary between two deformed grains with {113} orientation, and at grains boundaries between {113} and {100} deformed grain. The grain size after one inclined rolling (57 %) was larger and more homogeneous than the grain size after the two inclined rolling. Although with different cold rolling methods (one and two inclined rolling), the resulted annealing textures all had similar features. The difference was the relative intensities between the main texture. A significant feature of one inclined rolling was the intensification of the η‐fiber and the Goss texture component and the weakening of γ‐fiber. At an inclination angle of 60°, a significantly strong Goss texture was produced, which was highest among all samples, and the maximum volume fraction of {110}+{100} texture can also be obtained. One inclined rolling can better improve the magnetic properties of used silicon steel (B50), and the magnetic induction is between 1.712 T and 1.742 T. The highest magnetic induction of 1.742 T can be obtained by one inclined rolling (at an inclination angle of 60°). The cover picture show methods of improving the magnetic properties of used silicon steel. Used non‐oriented silicon steel was cut into small rectangular pieces at various angles to the initial cold rolling direction, which were performed one inclined rolling and two inclined rolling plus intermediate annealing after pickling (HCl solution) and fine grinding to remove the coating