The Research Process for the Preparation of Mg-based Semi-solid Slurry and Thixomolding Technology

Author of the article:WUZhenbo1,2, GUO Wei3, HUANG Runhua3, LI Xiang1,2, SUI Tiejun1,2, ZHAO Mi4, WANGJincheng5, QIAO Yan

Author's Workplace：1. Yizumi Holding Co., Ltd., Foshan 528306, China; 2. Guangdong Provincial Key Laboratory of Intelligent Molding Equipment Enterprises (Yizumi), Foshan 528306, China; 3. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 4. School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 5. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 6. National Experimental Teaching Demonstration Center of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Key Words：Mg-based alloys; semi-solid slurry; thixomolding technology; research process

Abstract： Due to the increasing requirements for lightweight materials in energy conservation and emission reduction, magnesium alloys have been widely applied in numerous fields. However, magnesium-based melts are prone to oxidation and combustion, which limits the methods used to form magnesium alloy components. Semi-solid formation can reduce defects and enhance material properties by transforming liquid metals into spherical semi-solid particles. Semi-solid thixomolding technology combines the advantages of high-pressure casting and injection molding, realizing the integration of semi-solid slurry preparation and the forming process, and can be used to produce thin-walled parts with complex shapes. This paper reviews the formation mechanism of the nondendritic structure of magnesium-based semi-solid slurries,summarizes the relevant semi-solid slurry preparation processes, introduces magnesium-based semi-solid thixomolding technology, and finally summarizes and prospects for the future development of magnesium-based semi-solid forming technology.