1. National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, Beijing, P. R. China
2. Pangang Group Research Institute Co., Ltd, Panzhihua, P. R. China
3. Pangang Group Xichang Steel and Vanadium Co., Ltd, Xichang, P. R. China
4. Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Korea