Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A Numerical Study of the Effect of Casting Temperature and Rotational Frequency of Mold on the Functionally Graded Microstructure in Centrifugal Casting of Hyper-eutectic Al-Si Alloy

과공정 Al-Si합금의 원심주조시 용탕온도와 금형회전수가 경사기능 조직에 미치는 영향에 대한 해석적 고찰

  • Park, Jeong-Wook (Dept. of Metallurgical System Eng., Pukyong National Univ.) ;
  • Kim, Heon-Joo (Dept. of Metallurgical System Eng., Pukyong National Univ.)
  • 박정욱 (부경대학교 신소재공학부 금속시스템공학과) ;
  • 김헌주 (부경대학교 신소재공학부 금속시스템공학과)
  • Published : 2009.06.30
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Abstract

Functionally graded microstructure of centrifugal cast Al-Si alloy, especially distribution of primary Si particles according to the changes of melt pouring temperature and rotation frequency was investigated by numerical simulation. Moving velocity of Si particles increased as the melt pouring temperature and rotational frequency of mold increased. Therefore, segregation tendency of primary Si particles toward inner side of cylindrical sample increased as the melt pouring temperature and rotational frequency of mold increased. Rich distribution region of particles was located at 0.9, 0.7, 0.4 mm from inner surface of cylindrical sample under the centrifugal cast condition of $750^{\circ}C$ melt pouring temperature and 1500, 2000 and 2500 rpm mold rotational frequencies, respectively, by numerical simulation.

Keywords

References

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