Numerical modeling and experimental verification of mold filling and evolved gas pressure in lost foam casting process

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 mo...

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Bibliographic Details
Published in:Journal of materials science 2002-07, Vol.37 (14), p.2997-3003
Main Authors: LIU, Y, BAKHTIYAROV, S. I, OVERFELT, R. A
Format: Article
Language:English
Subjects:
Applied sciences
Automotive parts
Casting
Exact sciences and technology
Foundry engineering
Gas pressure
Liquid metals
Lost foam casting
Materials science
Mathematical models
Metals. Metallurgy
Molds
Other casting methods. Solidification
Predictions
Pressure before casting
Pressure casting
Production techniques
Stress concentration
Temperature distribution
Transient heat transfer
Velocity distribution
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Description
Summary: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.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1016029300243