[1] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Tai Yuan Heavy Ind Transit Equipment Co Ltd, Tech Ctr, Taiyuan 030032, Peoples R China
[3] Shanxi Heavy Casting & Forging Engn Technol Res Ct, Taiyuan 030024, Peoples R China