Journal
STEEL RESEARCH INTERNATIONAL
Volume 87, Issue 10, Pages 1256-1263Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/srin.201500351
Keywords
non-oriented silicon steel; strip casting; microstructure; texture; magnetic property
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Funding
- National Natural Science Foundation of China [51004035, 51374002, 51574078]
- National Key Technology RD Program [2012BAE03B00]
- Fundamental Research Funds for the Central Universities [N140705001, L1507019]
- China Postdoctoral Science Foundation [2014M560218]
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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 lambda-fiber texture is formed after coiling at 650 degrees C. By contrast, a much coarser microstructure with a much stronger lambda-fiber texture is produced after coiling at 750 degrees C. After cold rolling and annealing, a fine and inhomogeneous recrystallization microstructure dominated by mild lambda-fiber, alpha-fiber, and gamma-fiber recrystallization texture is formed in the case of coiling at 650 degrees C. By contrast, a coarse and inhomogeneous recrystallization microstructure characterized by strong Goss, alpha- fiber, and weak lambda-fiber together with extremely weak gamma-fiber recrystallization texture is formed in the case of coiling at 750 degrees 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.
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