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Effects of Electromagnetic Stirring process on Melt Quality of A356 Aluminum Alloy

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Abstract

In A356 aluminum alloy, the effect of electromagnetic stirring process on the melt quality such as density index, hydrogen and oxygen content, and the inclusion amount were investigated. To determine the optimal EMS condition for the aluminum alloy, a numerical study of EMS was applied and the electromagnetic force strength, which is the main source for stirring the melt, was predicted according to the EMS application conditions. In this study, the melt cleaning effect of the EMS process was analyzed by measuring the cleanliness of the solidified A356 alloy samples cast with and without the EMS process. After applying EMS process, the deviation of density index (DI) and hydrogen content in the cast samples according to the specimen position decreased, and it was confirmed that EMS was effective in homogenizing molten metal quality. In the case of the center of the top position, the hydrogen content in the sample decreased by 39.8% after EMS application, and a clear degassing effect was observed. Compared to the cast sample without EMS application, the amount of inclusions decreased by 40 to 55% when EMS was applied. From this, it can be concluded that EMS process has the effect of homogenizing and improving molten metal quality.

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Acknowledgements

This research was supported by code number (S2640396) from the Ministry of SMEs and Startups, Republic of Korea. This paper is an invited submission to IJMC selected from presentations at the 74th World Foundry Congress, held October 16 to 20, 2022, in Busan, Korea, and has been expanded from the original presentation.

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Authors and Affiliations

  1. Korea Institute of Industrial Technology, Ulsan, 44776, South Korea

    Sunmi Shin, Ho Sung Jang, Suheon Kim, Pil-Hwan Yoon & Jin-Young Park

  2. Dong-A University, Busan, 49315, South Korea

    Jong Bae Jeon

  3. Pusan National University, Busan, 46241, South Korea

    Ho Sung Jang, Suheon Kim & Yoon Suk Choi

  4. Hanjoo Light Metal Co., Ltd., Ulsan, South Korea

    Joong Suk Roh & Seong Rak Park

  5. DNDE Inc., Busan, South Korea

    Jongdeok Lee & Seunghwan Moon

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  1. Sunmi Shin
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Correspondence to Sunmi Shin or Jong Bae Jeon.

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This paper is an invited submission to IJMC selected from presentations at the 74th World Foundry Congress, held October 16 to 20, 2022, in Busan, Korea, and has been expanded from the original presentation.

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Shin, S., Jeon, J.B., Jang, H.S. et al. Effects of Electromagnetic Stirring process on Melt Quality of A356 Aluminum Alloy. Inter Metalcast 17, 2652–2662 (2023). https://doi.org/10.1007/s40962-023-01052-3

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