Abstract
In this paper, the effects of solidification cooling rate on the inclusion distribution, magnetic properties, and texture of 3.3 wt% Si non-oriented steel with different carbon and sulfur (C&S) levels are measured and analyzed. Fast and slow cooled strip samples produced using specially designed melt samplers were thermo-mechanically treated by hot rolling (HR), cold rolling (CR), and final annealing. The fully processed fast cooled sample (~ 1700 K/s) exhibited a smaller average grain size compared to the sample produced with a low solidification cooling rate (~ 9 K/s). In addition, under each C&S level, smaller inclusions (in the range 0.15–1.0 μm) were observed in the high solidification cooling rate sample. Differences in Cube {100}〈001〉, S{213}〈364〉, Brass{110}〈112〉, Goss{110}〈001〉, and Copper{112}〈111〉 texture were also documented in the fully processed material. Under each C&S level, the sample with low solidification cooling rate had a lower core loss than the high cooling rate sample.
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Acknowledgements
The research was performed at Missouri University of Science and Technology (Missouri S&T). The authors would like to thank the graduate research assistants in MSE for their assistance during casting trials and acknowledge Brian Bullock for his help with the setup and manufacture of the samplers. The authors are also grateful to all the faculties and industry mentoring committee of Peaslee Steel Manufacturing Research Center (PSMRC) at Missouri University of Science and Technology (Missouri S&T), for their help and guidance.
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Du, Y., O’Malley, R.J. & Buchely, M.F. Effect of Cooling Rate on Magnetic Properties of Fe-3.3 wt% Si Non-oriented Electrical Steel. Met. Mater. Int. 28, 3160–3171 (2022). https://doi.org/10.1007/s12540-022-01184-x
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DOI: https://doi.org/10.1007/s12540-022-01184-x