Effect of Ca-enhanced AE81M magnesium alloy on melt oxidation during low-pressure die casting of automotive wheels

Ziwen Li; Tian Li; Jiangfeng Song; Bin Jiang; Yuyang Gao; Ang Zhang; Linsong Gong; Jianjun Qiu; Fusheng Pan

Journal of Materials Research and Technology (Nov 2024)

Effect of Ca-enhanced AE81M magnesium alloy on melt oxidation during low-pressure die casting of automotive wheels

Ziwen Li,
Tian Li,
Jiangfeng Song,
Bin Jiang,
Yuyang Gao,
Ang Zhang,
Linsong Gong,
Jianjun Qiu,
Fusheng Pan

Affiliations

Ziwen Li: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China
Tian Li: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; Zhejiang Wanfeng Precision Casting Co., Ltd., Shengzhou, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China; Corresponding author. National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China.
Jiangfeng Song: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China
Bin Jiang: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China; Corresponding author. National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China.
Yuyang Gao: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China
Ang Zhang: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China
Linsong Gong: Chongqing Dicastal Jieli Wheel Manufacturing Co., Ltd, Chongqing, 400044, PR China
Jianjun Qiu: Chongqing Dicastal Jieli Wheel Manufacturing Co., Ltd, Chongqing, 400044, PR China
Fusheng Pan: National Engineering Research Centre for Magnesium Alloys, Chongqing University, Chongqing, 400044, PR China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, PR China

Journal volume & issue: Vol. 33
pp. 9820 – 9831

Abstract

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AE81 M and AE81M − Ca ignition-proof magnesium alloys were used to produce 16-inch wheels through an LPDC process. Defects in the castings were inspected and analysed, revealing entrained oxide films composed of fluorides and oxides. The melt oxidation during the filling process was investigated, and the reproducibility of the mechanical properties of the cast wheels was evaluated using Weibull modulus. The results indicate that in an air atmosphere, adding Ca to the AE81 M alloy enhances oxidation resistance, reducing severe burning and minimizing oxide defect formation. However, in the presence of SF6-containing cover gas, Ca addition can result in a thicker oxide film. Therefore, the effect of Ca addition on the reproducibility of mechanical properties in Mg-alloy LPDC products highly depends on the specific casting conditions and gas environment.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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