ISSUE 2/2014

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Polyakov, S. N.; Korowin, V. M.; Korotschenko, A. J.; Bast, J. Effect of gravity forces and gas saturation of the melt on the porosity in castings

The work presented theoretical studies about the effect of casting conditions (gravity and gas segregation) on the Niyama criterion in gravity castings in sand moulds. It is proposed a new method for the prediction of porosity by changeable Niyama criterion depending on the casting conditions. The application of the results of this work enhances the quality of computer-aided development of gating and feeding system with a more accurate prediction of porosity in the casting. Tests were carried out for both steel and aluminium alloys.

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