Solidification of Alloy with Conductive Impurity under the Influence of Electromagnetic Field of Various Configurations
摘要
The study is dedicated to the process of electromagnetic stirring of liquid metal containing solid conductive particles and the effect of forced stirring during metal solidification on the redistribution of impurities in the ingot. Stirring is achieved by non-contact influence of traveling and pulsating magnetic fields of varying topologies. The research was conducted experimentally using a low-melting point gallium alloy (for flow structure analysis) and a tin-lead alloy (for solidification studies). The flow structures generated in the liquid metal under external force application, as well as the impurity concentration fields after crystallization under the influence of external electromagnetic forces, were obtained. Stirring flow velocity field measurements were performed using the optical particle image velocimetry method, while concentration field measurements were carried out via local conductivity measurements of the ingot. A homogeneity parameter for impurity distribution was introduced, and the dependence of this coefficient on the stirring regime was determined.