Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Study on the Production of Aluminum Components by Direct Rheo Die Casting with Electromagnetic Stirrer

  • Roh, Joong-Suk (School of Mechanical Engineering, Kyungnam University) ;
  • Heo, Min (School of Mechanical Engineering, Kyungnam University) ;
  • Jin, Chul-Kyu (School of Mechanical Engineering, Kyungnam University) ;
  • Park, Jin Ha (School of Mechanical Engineering, Kyungnam University) ;
  • Kang, Chung-Gil (School of Mechanical Engineering, Kyungnam University)
  • Received : 2020.06.09
  • Accepted : 2020.07.08
  • Published : 2020.08.31
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Abstract

This paper relates a rheo die casting using electromagnetic force, which is one of the representative semi-solid methods for aluminum. The most important factors in electromagnetic stirring would be the melt temperature, sleeve temperature, electromagnetic force, and input time. The effect of the temperature of molten alloy on the direct rheo-casting is assessed in this study. The temperature of the molten alloy is set to 590 ℃ with a solidification of 40%, 600 ℃ with 30%, and 610℃ with less than 20%. Under the condition of 590 ℃ with a solidification of 40%, the whole molten alloy is solidified, causing non-forming during forming process. Meanwhile, under the condition of 600 ℃, where the solidification was 30%, appropriate amount of molten alloy is solidified, filled well into the mold, resulting in good forming, while at 610 ℃ with the solidification of 20%, the molten alloy is not sufficiently solidified and scattered away. The investigation of the defects inside the product with the help of the X-ray equipment shows that the electromagnetic stirring at 590 ℃ with a solidification of 30% produces many air-pores inside the product.

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