Structure and Precipitation of Strip As-Cast and Hot-Rolled by TSCR on Oriented Silicon Steel

Abstract:

The simulation studies were carried out on the oriented silicon steel produced by thin slab casting and rolling (TSCR) and twin-roll strip casting in the laboratory. The precipitation of inhibiter, formation of microstructure and texture were investigated before cold rolling. The inhomogeneous microstructure and texture gradient were observed in the 7-pass hot-rolled strip（2mm）for TSCR process, and texture gradient was not changed after normalizing, and the twin-roll strip casting directly supplied a strip with approx 2mm of thickness being same as that of hot-rolled strip by TSCR. The microstructure of twin-rolling casting strip was almost composed of all equiaxed grains which similar to the normalizing microstructure in TSCR process, but the random texture was obtained by twin-rolling strip casting. The dispersed and clustered precipitates were presented in hot-rolled strip when the ingots were soaked at 1200°C and 1150°C respectively for the TSCR process. And disperse and acicular precipitates were observed by TEM for air-cooling cast strips for process twin-rolling casting.

• Periodical: Materials Science Forum (Volume 686)
• Pages: 506-510
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.686.506
• Online since: June 2011
• Authors: Yong Mei Yu, Yun Bo Xu, Yuan Xiang Zhang, Ting Zhang, Xiao Ming Zhang, Guo Dong Wang
• Keywords: Microstructure, Precipitation, Silicon Steel, Strip Casting, Texture, Thin Slab Casting, Thin Slab Rolling

References

[1] J.G. Landgrafa, T. Yonamine, R. Takanohashi: Journal of Magnetism and Magnetic Materials. Vol. 254-255 (2003), p.364.

[2] Jae Young Park, Kyu Hwan Oh and Hyung Yong Ra: Scripta Materialia. Vol. 40 (1999), p.881.

[3] Fortunati: US.: 6273964, (2001).

[4] Norman G, Ainslie and Alan U. Seybolt: Journal of the Iron and Steel Institute, Vol. 3 (1996), p.341.

[5] S. Nakashima, K. Takashima, J. Harase: Acta Metallurgical et Materialia. Vol. 42 (1994), p.539.

[6] Yu Yongmei, Xu Yunbo, Li Changsheng, Wang Guodong: Transactions of Materials and Treatment. Vol. 31 (2010), p.25.