Rezumat
CZU 537.528:669.017.16
DOI https://doi.org/10.52577/eom.2022.58.2.21
By the methods of mathematical three-dimensional modeling, the features of the distribution of electric and thermal fields in the volume of the molten alloy of the foundry hypoeutectic silumin A356, when it is treated with an electric current by parallel electrodes, are established. It was found that the geometry of the electrode system qualitatively and quantitatively determines the effect of the electrothermal effect on the melt by the treatment of the direct current. It was demonstrated that the depth of the deepening of electrodes with a non-insulated lateral surface does not have an active influence on the temperature processes during the conduction electric current treatment. The obtained qualitative and quantitative data for the systems with non-insulated electrodes correspond to the experimental data. It is shown that a change in the spatial geometry of the arrangement of electrodes with an isolated lateral surface significantly affects the three-dimensional distribution of electric and thermal fields as well as the quantitative, more than thrice, change in the characteristics of these fields in the volume of the melt. The method of controlling of the conductive electric current treatment of melts, based on the spatial change of the type of electrode system, does not require additional financial costs and can be carried out directly during the treatment.
Keywords: silumin, melt, three-dimensional modeling, electric current, parallel electrodes, electric field, thermal field.