Theory and Technology of Metallurgical Production

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Bulitko E.V., Savinov A.S., Feoktistov N.A., Chernov V.P., Zaritsky B.B. EVALUATION OF THE INFLUENCE OF THE EXOTHERMAL INSERT ON THE HEAT FIELD OF THE "CAST-FORM" SYSTEM

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Abstract

One of the most important issues in obtaining high-quality casting is the organization of effective feeding of the casting. To exclude the possibility of the appearance of shrinkage defects in the body of the casting, it is necessary to correctly establish the profits in places that are the place of concentration of shrinkage defects. Currently, an urgent task is the use of exothermic inserts in order to reduce the metal consumption of the mold, by reducing profits, without losing high-quality feeding of the casting. This solution improves the production process of castings and reduces the contact surface of the head with the casting, the elimination of which after the removal of the casting costs money. The article deals with the influence of the thermal state of the exothermic insert on the thermal field of the "casting-mold" system. Mathematical modeling was carried out using the well-known finite difference technique. The calculation algorithm for the application of a specific model of the exothermic insert is shown, which allows to reduce the problems of shrinkage and improve the quality of cast products at the metallurgical enterprise MRK LLC. Also, a mathematical apparatus has been developed that allows you to calculate the temperature fields when using exothermic inserts. The question of the influence of the size of the profit on the time of its complete solidification and the possibility of feeding the casting is considered. It was revealed that a 3-fold reduction in the diameter of the head allows for high-quality feeding of the casting.

Keywords

Exothermic insert, thermal field, mathematical modeling, casting-mold system, finite difference method, shell, casting, shrinkage.

Bulitko Elena V. – Post-graduate student of the Department of Foundry Processes and Materials Science, group МТа-18-3, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Savinov Alexander S. – Head of the Department of Mechanics, Director of the Institute of Metallurgy, Mechani-cal Engineering and Material Processing, Doctor of Technical Sciences, Associate Professor, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Feoktistov Nikolay A. – Head of the Department of Foundry Processes and Materials Science, Candidate of Technical Sciences, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Chernov Victor P. – Professor of the Department of Foundry Processes and Materials Science, Doctor of Tech-nical Sciences, Professor, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Zaritsky Boris B. – Senior Lecturer, Department of Mechanics, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

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