대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2001년도 춘계학술대회논문집D
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- Pages.319-324
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- 2001
용탕주조법을 이용한 금속복합재료 제조공정의 열전달 해석
Numerical Modeling of Heat Transfer for Squeeze Casting of MMCs
- 정창규 (포항공과대학교 대학원) ;
- 변현중 (포항공과대학교 대학원) ;
-
정성욱
(포항공과대학교 대학원) ;
- 남현욱 (포항공과대학교 첨단공학연구소) ;
-
한경섭
(포항공과대학교 기계과)
- Jung, C.K. ;
- Pyun, H.J. ;
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Jung, S.W.
;
- Nam, H.W. ;
-
Han, K.S.
- 발행 : 2001.06.27
초록
A finite element model for the process of squeeze casting for metal matrix composites (MMCs) in cylindrical mold is developed. The fluid flow and the heat transfer are the fundamental phenomena in the squeeze casing process. To describe heat transfer with solidification of molten aluminum, the energy equation in terms of temperature and enthalpy are applied to two dimensional axisymmetric model which is similar to the experimental system. And one dimensional flow model is employed to simulate the transient metal flow. The direct iteration technique was used to solve the resulting nonlinear algebraic equations. A computer program is developed to calculate the enthalpy, temperature and fluid velocity. Cooling curves and temperature distribution during infiltration and solidification are calculated for pure aluminum. The temperature is measured and recorded experimentally. At two points of the perform inside and one point of the mold outside, thermocouple wire are installed. The time-temperature data are compared with the calculated cooling curves. The experimental results show that the finite element model can estimate the solidification time and predict the cooling process.