한국주조공학회지 (Journal of Korea Foundry Society)

  • 제13권6호
  • /
  • Pages.540-546
  • /
  • 1993
  • /
  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

강제대류시 고순도 Al괴의 응고조직에 미치는 유동의 영향

A Study on the Effect of Fluid Flow on the Microstructure of High Purity Al Ingot under Forced Flow

  • 김경민 (한양대학교 재료공학과) ;
  • 김헌주 (국립부산공업대학 금속공학과) ;
  • 하기윤 (대한알루미늄(주) 경금속기술연구소) ;
  • 윤의박 (한양대학교 금속공학과)
  • Kim, Kyoung-Min (Dept. of Materials Engineering, Hanyang University) ;
  • Kim, Heon-Joo (Dept. of Metallurgical Eng., Pusan National University of Technology) ;
  • Ha, Ki-Yun (Aluminum of Korea Research Institute, Aluminium of Korea Ltd.) ;
  • Yoon, Eui-Pak (Dept. of Metallurgical Eng., Hanyang University)
  • 발행 : 1993.12.20
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초록

The effects of fluid flow on the purification of aluminum were studied. As the revolution rate(N) increased, the size of columnar grain decreased gradually. The concentration of solidified crystal was decreased with increasing distance from chill and revolution rate(N). Distribution boundary layer thickness(${\delta}$) was calculated from the solute distribution obtained in solid experimentally and by use of BPS equation. The value of ${\delta}$ changed from about $60{\mu}m$ at N value of 27rpm to about $15{\mu}m$ at N value of 1000rpm. From this result, high purification was obtained by decreasing the diffusion boundary layer under forced convection.

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