1. Engineering Research Center of Continuous Extrusion, Dalian Jiaotong University, Dalian, P. R. China;
2. School of Energy and Electromechanical Engineering, Hunan University of Humanities, Science and Technology, Hunan, P. R. China;
3. Dalian Konform Technical Company Ltd., Dalian, P. R. China;
4. Department of Materials Science and Engineering, Dalian Jiaotong University, Dalian, P. R. China