1. Key Laboratory of Electromagnetic Processing of Materials; Ministry of Education; Northeastern University; Shenyang 110004 P. R. China
2. School of Metallurgy; Northeastern University; Shenyang 110004 P. R. China
3. The Key Laboratory of Ferrous Metallurgy and Resource Utilization; Ministry of Education; Wuhan University of Science and Technology; Wuhan 430081 Hubei P. R. China
4. The State Key Laboratory of Refractories and Metallurgy; Wuhan University of Science and Technology; Wuhan 430081 Hubei P. R. China