Исследование кинетики затвердевания слитков на основе физического моделирования разливки и кристаллизации расплава

Study of the processes, taking place at the large ingots obtaining during steel casting, as well as during its solidification is a rather hard task. Therefore it is reasonable to use for the study of them methods of solidification modelling by application various hard particles (inoculators), being introduced into a melt. Evaluation of the inoculation effect on the solidification process, structure formation and defected zones extension in model ingots carried out. It was determined, that introduction of inoculators during melt casting results in decreasing of the diphasic zone thickness. It was determined also, that introduction of hard particles (inoculators) in the volume of from 6 till 12% results in reducing time of model ingots solidification. An increase the volume of inoculators leads to prevalence of solidification vertical component over the horizontal one. It was determined also, that introduction of inoculators allows increasing the solidification process orientation, that characterized by an increase of linear taper and as a result – the vertical solidification component increase. It was revealed, that introduction of inoculators at the liquid-solid casting leads to changing the heat center location. The introduction of inoculators results to “elongation” of heat center by the solidifying ingot axis, that relates with a quicker advance of the solid phase in vertical direction, as a result of the quick removal of solidifying ingot overheating.