Abstract
The paper presents the results of laboratory studies of the effect of the method and speed of casting the melt on the solidification process and the features of the formation of the axial zone of a large ingot. The research was carried out by the method of physical (cold) modeling on a model of an ingot weighing 19.6 tons. Sodium sulfuric acid (crystalline hyposulfite) was used as a modeling solution. The casting of the melt into the mold-mold was carried out from above. It is shown that the change in the melt casting rate has a significant effect on the length of the axial zone. It is established that a decrease in the melt casting rate leads to an increase in the direction of crystallization and an improvement in the structure of the axial zone of the ingot. It has been found that model ingots that were cast with refilling of the profitable part by melt after a certain time interval after pouring the ingot body, solidify 1.4 times faster than the ingot cast according to classical technology.
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