pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (13권6호 540-546)
A Study on the Effect of Fluid Flow on the Microstructure of High Purity Al Ingot under Forced Flow
강제대류시 고순도 Al괴의 응고조직에 미치는 유동의 영향
lkyoung-Min Kim*, Heon-Joo Kim**, Ki-Yun Ha***, Eui-Pak Yoon****
*Hanyang University, **Pusan National University of Technology, ***Aluminium of Korea Ltd., ****Hanyang University
he 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(δ) was calculated from the solute distribution obtained in solid experimentally and by use of BPS equation. The value of δ changed from about $60{\mu}m$ 수식 이미지 at N value of 27rpm to about 15μм 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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