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Microstructure and Texture of Strip Cast Grain‐Oriented Silicon Steel after Symmetrical and Asymmetrical Hot Rolling
Author(s) -
Song HongYu,
Lu HuiHu,
Liu HaiTao,
Li HaoZe,
Geng DianQiao,
Misra R. Devesh K.,
Liu ZhenYu,
Wang GuoDong
Publication year - 2014
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.201300385
Subject(s) - microstructure , materials science , pearlite , electrical steel , ferrite (magnet) , texture (cosmology) , metallurgy , composite material , martensite , austenite , image (mathematics) , artificial intelligence , computer science
A grain‐oriented silicon steel as‐cast strip was produced by twin‐roll strip casting. Then the as‐cast strip was symmetrically and asymmetrically hot rolled, respectively. The microstructure and texture evolution was investigated by a combination of optical microscopy, X‐ray diffraction, and electron backscattered diffraction methods. The microstructure of the as‐cast strip consisted of ferrite matrix and martensite, and the texture was characterized by pronounced {001} 〈0vw〉 fiber texture in the outer layers and nearly random texture in the inner layers. After symmetric hot rolling, the microstructure was composed of deformed ferrite grains, proeutectoid ferrite grains and pearlite. The texture was characterized by pronounced {001} 〈0vw〉 fiber texture in the outer layers and mild γ‐fiber texture in the inner layers. By contrast, when asymmetric hot rolling was applied, considerably dispersive proeutectoid ferrite and pearlite and relatively strong Goss texture were observed, together with strong {001} 〈0vw〉 fiber texture in the outer layers.