Abstract
A simple mathematical model is developed to describe a lost foam casting process. Different aspects of the process, such as liquid metal flow, transient heat transfer, foam degradation and gas elimination were incorporated into this numerical model. Fluid velocity, temperature distribution within molten metal and pressure building-up in the mold cavity are predicted as a function of filling time and filling height. The model was verified by comparison of the predicted velocity profiles, temperature fields and back-pressures with the experimental data conducted in this work. Both coated and uncoated foam patterns were used in experimental part of this study. A good agreement between the predictions and the experimental data was found.
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References
M. J. LESSITER, Modern Casting 4 (1997) 32.
L. WANG, S. SHIVKUMAR and D. APELIAN, AFS Transactions 181 (1990) 923.
Y. SUN, H. L. TSAI and D. R. ASKELAND, ibid. 104 (1996) 271.
S. SHIVKUMAR, X. YAO and M. MAKHLOUF, Scripta Metallurgica et Materialia 33 (1995) 39.
J. YANG, T. HUANG and J. FU, AFS Transactions 128 (1998) 21.
T. SHIH and A. CHANG, ibid. 110 (1997) 387.
J. ZHU, I. OHNAKA, T. OHMICHI, K. MINESHITA and Y. YOSHIOKA, J. Japan Foundry Engineering Society 72 (2000) 715.
H. L. TSAI and T. S. CHEN, AFS Transactions 86 (1988) 881.
S. ABAYARATHNA and H. L. TSAI, ibid. 130 (1989) 645.
S. ABAYARATHNA, ibid. 131 (1989) 653.
I. OHNAKA, in “Modeling of Casting, Welding and Advanced Solidification Processes VI,” edited by T. S. Piwonka et al. (MMMS, 1993) p.337.
C. M. WANG, A. J. PAUL and O. J. HUEY, in “Modeling of Casting,Welding and Advanced Solidification Processes VI,” edited by T. S. Piwonka et al. (MMMS, 1993) 477.
W.-S. HWANG, Advanced Casting Technology 2 (1986) 71.
M. N. OZISIK, “Finite Difference Methods in Heat Transfer” (CRC Press, Florida, 1994).
S. SHIVKUMAR, L. WANG and D. APELIAN, JOM 38 (1990) 38.
M. C. FLEMMINGS, British Foundryman 57 (1964) 312.
M. H. WARNER, B. A. MILLER and H. E. LITTLETON, AFS Transactions 161 (1998) 77.
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Liu, Y., Bakhtiyarov, S.I. & Overfelt, R.A. Numerical modeling and experimental verification of mold filling and evolved gas pressure in lost foam casting process. Journal of Materials Science 37, 2997–3003 (2002). https://doi.org/10.1023/A:1016029300243
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DOI: https://doi.org/10.1023/A:1016029300243