Reoxidation Processes Prediction in Gating System by Numerical Simulation for Aluminium Alloys

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Abstract

Pouring of liquid aluminium is typically accompanied by disturbance of the free surface. During these disturbances, the free surface oxide films can be entrained in the bulk of liquid, also pockets of air can be accidentally trapped in this oxide films. The resultant scattering of porosity in castings seems nearly always to originate from the pockets of entrained air in oxide films. Latest version of ProCast software allows to identify the amount of oxides formed at the free surface and where they are most likely to end-up in casts. During a filling calculation, ProCast can calculate different indicators which allow to better quantify the filling pattern. The fluid front tracking indicator “Free surface time exposure” has the units [cm2*s]. At each point of the free surface, the free surface area is multiplied by the time. This value is cumulated with the value of the previous timestep. In addition, this value is transported with the free surface and with the fluid flow. Experiments to validate this new functions were executed.

[1] Ramachander, J. (2016). Castings defects in predicting the occurrence and effects. International Journal of Advanced Technology in Engineering and Science. 4(10), October 2016, ISSN 2348-7550.

[2] Campbell, J. (2015). Complete casting handbook 2nd edition. Butterwoth-Heinemann. ISBN 978-0-444-63509-9. pp 1054.

[3] Tillová, E., Chalupová, M., Hurtalová, L. & Ďurníková, E. (2011). Quality control of microstructure in recycled Al-Si cast alloys. Manufacturing Technology, 11(11), 70-76.

[4] Vasková, I., Jančok, J., Hrubovčáková, M. & CONEV, M. (2015). Hydrogen Removal from Liquid Metal, Manufacturing Technology. 15(4), 737-739.

[5] Malik, J., Futas, P., Vaskova, I. & Eperjesi, S. (2007). Influence of the technological factors of casting on the quality of silicon castings. Slèvarenstvè. ISSN 0037-6825. 4-5, 259-262. (in Czech).

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

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CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

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