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Effects of Coiling Temperature after Hot Rolling on Microstructure, Texture, and Magnetic Properties of Non‐Oriented Electrical Steel in Strip Casting Processing Route
Author(s) -
Liu HaiTao,
Li HuaLong,
Schneider Juergen,
Liu Yi,
Wang GuoDong
Publication year - 2016
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201500351
Subject(s) - microstructure , recrystallization (geology) , materials science , electrical steel , annealing (glass) , metallurgy , composite material , fiber , fabrication , medicine , paleontology , alternative medicine , pathology , biology
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.