超轻镁锂合金熔炼工艺研究

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Abstract Magnesium-lithium alloy as the lightest metal structural material at present, it has broad application prospects in aerospace, weapons and equipment, automotive and other fields due to its outstanding advantages such as low density, high specific strength, and high specific stiffness.However, in order to realize the large-scale application of ultralight magnesium-lithium alloys, it is necessary to solve the problem of difficult melting. This article reviews the current melting process of magnesium-lithium alloys, and takes Mg-8Li-3Al-3Zn-1Y as the research object, adopts SF₆ gas protection casting air cooling, covering agent surface protection furnace cooling, covering agent comprehensive protection furnace coo-ling, covering agent and Ar gas protection casting air cooling and vacuum induction melting and Ar gas protection casting furnace cooling five melting processes to prepare magnesium-lithium alloys. The effects and mechanical properties of magnesium-lithium alloys prepared by five melting processes were compared and analyzed. Summarize the advantages and disadvantages of each melting process. The research in this paper has important guidance and reference significance for obtaining complete, defect-free, structure-optimized and high-performance cast magnesium-lithium alloys, as well as optimizing the large-scale production and preparation of magnesium-lithium alloys.

Key words： magnesium-lithium alloy melting process mechanical properties weight-reducing material production cost

Published: 01 July 2020

CLC number:

TG292

Fund:This work was financially supported by the National Funds for Equipment Pre-Research (61409220408), the Program of China Scholarships Council (201808615136),the Key Research and Development Plan Project of Shaanxi Province (2019KW-23) and the Doctoral Scientific Research Starting Foundation of Shaanxi University of Science and Technology (2016GBJ-02).

About author:: Wenjie Song is an associate professor and master's tutor of the School of Mechanical and Electrical Enginee-ring in Shaanxi University of Science and Technology. In 2016, he graduated from Northwestern Polytechnical University with a doctorate degree in materials processing engineering (Master and Doctor). He is the winner of excellent doctoral dissertation of Northwestern Polytechnical University. In the same year, he joined the School of Mechanical and Electrical Engineering of Shaanxi University of Science and Technology. He has been engaged in research on the melting process, microstructure and mechanical properties of magnesium-lithium alloys. Dr. Song has presided over 5 projects including the National Defense Basic Scientific Research Program of China, the Program of China Scholarships Council, the Key Research and Development Plan Project of Shaanxi Province, the Northwestern Polytechnical University Doctoral Dissertation Innovation Fund and the Doctoral Scientific Research Starting Foundation of Shaanxi University of Science and Technology. He also has participated in 5 projects including the National Defense Basic Scientific Research Project, the National Major Project, the State Key Laboratory of Solidification Technology and the Shanxi Province Key Laboratory of Advanced Magnesium-based Materials. Dr. Song has published more than 10 high-level SCI papers in important domestic and foreign journals such as Journal of Power Sources, Applied Surface Science, Journal of Alloys and Compounds, and has applied for 4 invention patents. He has participated in international and domestic academic conference reports six times, including two invited reports.

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	SONG Wenjie
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	DONG Huiping
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	WANG Tong

Cite this article:

SONG Wenjie,LIU Jie,DONG Huiping, et al. Research on Melting Process of Ultralight Magnesium-Lithium Alloys[J]. Materials Reports, 2020, 34(Z1): 316-321.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/316

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