Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A Study on the Joining of Different Al Alloys by Centrifugal Casting

원심주조를 이용한 2종 알루미늄의 접합에 대한 연구

  • Jang, Young-Soo (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University) ;
  • Lee, Moon-Hyoung (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University) ;
  • Moon, Jun-Young (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University) ;
  • Hong, Chun-Pyo (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University)
  • 장영수 (연세대학교 금속시스템공학과 재료공정 모델링 연구실) ;
  • 이문형 (연세대학교 금속시스템공학과 재료공정 모델링 연구실) ;
  • 문준영 (연세대학교 금속시스템공학과 재료공정 모델링 연구실) ;
  • 홍준표 (연세대학교 금속시스템공학과 재료공정 모델링 연구실)
  • Published : 2007.11.20
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Abstract

To improve the quality of the product and the cost efficiency, the joining of A356 alloy to an Al-18wt%Si alloys has been performed by centrifugal casting. The influence of the mold preheating temperature, the pouring temperature and the rotational velocity of the mold on the microstructures of the shell in the centrifugal casting was investigated using the experimental and simulation methods. In the present study, the cellular automaton (CA) technique and the finite volume method (FVM) were adopted to simulate the evolution of the macro structures and to calculate the temperature profiles, respectively. The evolution of the microstructures was also simulated using a modified cellular automaton (MCA) model. The optimal rotational speed of the mold for obtaining the sound shape of the shell was estimated experimentally to be over 1200 rpm. For the uniform microstructure, the outer shell needs to be cast with higher preheated mold temperature and lower pouring temperature, and the melt was poured at lower temperature in the inner shell. In order to obtain the sound shape of the joining, the different materials were poured simultaneously.

Keywords

References

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