Variables Affecting Heat Transfer and Surface Roughness in LFC of LM6 Aluminum Alloy

Shayganpour, A.; Idris, M. H.; Izman, S.; Farahany, S.
November 2011
International Review of Mechanical Engineering;Nov2011, Vol. 5 Issue 7, p1168
Academic Journal
Influences of variable parameters such as pouring temperature (700-740°C), slurry viscosity (20-26s), vibration time (30-90s) and sand size (30-100 AFS) in terms of heat transfer and surface roughness during lost foam casting (LFC) of LM6 alloy were investigated. In this paper those process parameters have been systematically investigated and the effect of different casting parameters has been determined. Surface roughness is primarily dependent on production process, mould material, melt treatment and cooling condition or heat transfer. Heat transfer of molten materials is an important factor to change the microstructure and mechanical properties which is considered in the present study. A full 2-level factorial design experimental technique was used to identify the significant factors that effect on heat transfer and surface roughness of castings. The results show that increasing pouring temperature resulted in decreasing heat flow and surface. However other parameters do not exhibit significant influence on those features.


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