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Heating and heat treatment
ArticleName The study of the influence of the initial furnace temperature on the temperature drop across the section of a billet using physical modeling
ArticleAuthor O. B. Kryuchkov, P. I. Malenko, S. S. Konovalov, O. V. Kostygova
ArticleAuthorData

Volgograd State Technical University (Volgograd, Russia):

O. B. Kryuchkov, Cand. Eng., Prof., Deputy Dean, e-mail: olegk@vstu.ru

 

Tula State University (Tula, Russia):
P. I. Malenko, Cand. Eng., Associate prof., e-mail: malenko@tsu.tula.ru
O. V. Kostygova, Master Student, e-mail: kostygova@pochta.ru

 

Volzhsky pipe plant (Volzhsky, Russia):
S. S. Konovalov, Engineer, Central Plant Laboratory, e-mail: vtz@vtz.ru

Abstract

Under the temperature mode of heating billet in heating and thermal furnaces is understood the behavior of the temperature change of the furnace, billet surface and core over time. When the metal is heated for heat treatment, the heating mode is usually set from technological considerations, and when it is heated for metal deformation processing, the technological conditions determine the final temperatures. The heating process should be carried out at the maximum rate, because with decreasing the time for heating the metal charge, the furnace productivity increases, the burn-off and decarburization of the metal go down. However, the heating rate of the charge must be limited because of the danger of overheating of the billet surface, its possible distortion or even destruction under the action of temperature stresses. Therefore, obtaining high-quality billet can be associated with temperature control on its surface and over the cross section. The task becomes more complicated when the metal is heated in a chamber furnace, where the charge is formed in several layers on the height of the furnace. On an example of heating a cylindrical bar with a diameter of 0.08 m and length of 0.25 m from steel 45, the method to calculate the allowable temperature difference over its cross section as compared to the actual one in order to eliminate the occurrence of unacceptable temperature stresses is given. It is established that heating this cylindrical bar when charging it into the electric chamber furnace at temperatures of 640 and 990 °C does not lead to the occurrence of unacceptable temperature stresses on its cross section. The method of physical modeling was used to calculate the temperature drop over the cross section of a single bloom and the charge of six BH15 steel blooms laid in the furnace close to each other in two layers on height at different initial temperatures of the electric heating zone. It has been established that in order to eliminate the occurrence of unacceptable temperature stresses in a single bloom, its charging into the electric heating zone should be carried out at the furnace temperature not higher than 470 °C, and the six blooms should be heated at the initial furnace temperature below 350 °C.

Results of the study have been published at financial support of the Tula State University within the framework of the science project 2017-76 publications.

The authors express gratitude to Relmasira K. J. for support in conducting experimental studies.

keywords Stresses in the metal billet, heating for heat treatment and metal forming, physical modeling, model material, linear scale of the model, temperature and time scale of modeling, temperature field in the billet
References

1. Krivandin V. A., Arutyunov V. A., Belousov V. V., Krupennikov S. A., Sborshchikov G. S., Kobakhidze V. V., Egorov А. V., Filimonov Yu. P. Heat engineering of metallurgical production. Vol. 1. Fundamentals: tutorial for higher education institutions. Moscow: MISIS. 2002. 608 p.
2. Krivandin V. A., Belousov V. V., Sborshchikov G. S., Kruzhkov V. A., Kobakhidze V. V., Pribytkov I. A., Egorov А. V., Filimonov Yu. P. Heat engineering of metallurgical production. Vol. 2. Design and operation of furnaces: tutorial for higher education institutions. Moscow: MISIS. 2002. 736 p.
3. Krivandin V. A., Markov B. L. Metallurgical furnaces. Moscow: Metallurgiya. 1977. 464 p.
4. Zolotukhin N. M. Heating and cooling the metal. Moscow: Mashinostroenie. 1973. 192 p.
5. Chen-Yan Syuy. Development of the rational heat technology for obtaining continuous cast billets: dissertation … of Candidate of Engineering Sciences. Dnepropetrovsk. Natsionalnaya metallurgicheskaya akademiya Ukrainy. 2000. 158 p.
6. Nekrasova N. S. Development of the method to calculate batch-type induction plants for gradient heating sheared cylindrical rods: thesis of inauguration of dissertation … of Candidate of Engineering Sciences. Moscow: MEI. 2013. 19 p.
7. Dentella F. Improved combustion technology for heating of billets for rolling production. Chernye Metally. 2017. No. 6. pp. 57–61.
8. Marschall Н. U., Jandl C. Design evaluation of BOF-linings with the aid of thermomechanical simulation. Proceedings of the Iron & Steel Technology Conference: 2-5 May 2011, Indianapolis, Indiana, U.S.A. AIST, Association for Iron & Steel Technology. 2011. Vol. 1. pp. 1223–1230.
9. El Fakir O., Wang L., Balint D., Dear J.P., Lin J., Dean T. A. Numerical study of the solution heat treatment, forming, and in-die quenching (HFQ) process on AA5754. International Journal of Machine Tools and Manufacture. 2014. Vol. 87. pp. 39–48.
10. Su B., Han Z., Zhao Y., Shen B., Xu E., Huang S., Liu B. Numerical simulation of microstructure evolution of heavy steel casting in casting and heat treatment processes. ISIJ International. 2014. Vol. 54. No. 2. pp. 408–414.
11. Zhou S., Song B., Xue P., Cai C., Liu J., Shi Y. Numerical simulation and experimental investigation on densification, shape deformation, and stress distribution of Ti6Al4V compacts during hot isostatic pressing. The International Journal of Advanced Manufacturing Technology. 2017. Vol. 88. No. 1–4. pp. 19–31.
12. Shivaram P. K. CFD modeling to simulate gas stirring process using bottom plugs in a steel ladle. AISTech 2015 Proceedings: The Iron and Steel Technology Conference and Exposition, Cleveland, Ohio, 4-7 May, 2015. Warrendale (Pa). 2015. Vol. 2. pp. 2277–2286.
13. Ginkul S. I., Tuyakhov A. I., Sibirtsev Yu. S. Mathematical modeling temperature mode of rolling mill`s heating furnaces at simultaneous heating metal of various mix. Collection of scientific works Don-NTU-2012. Seriya metallurgiya. 2012. Iss. 1(14)–2(15). pp. 178–185.
14. Novoseltsev V. N. Advantages and disadvantages of mathematical modeling. Fundamentalnye issledovaniya. 2004. No. 6. pp. 121–122.
15. Hackl G., Kohler S., Fellner W., Marschall U., Pungersek R., Tummer B. Physical and numerical simulation for improvement of refractories in steelmaking shops. Chernye Metally. 2018. No. 1. pp. 57–62.
16. Mastryukov B. S. Theory, design and calculations of metallurgical furnaces. In 2 volumes. Vol. 2. Calculations of metallurgical furnaces. Moscow: Metallurgiya. 1986. 376 p.
17. Kazantsev E. I. Industrial furnaces. Moscow: Metallurgiya. 1975. 368 p.
18. Dubyago D. S., Osnovin V. N., Shulyakov L. V. Reference book on building materials and products. Rostov-on-Don: Feniks. 2008. 443 p.
19. Grishchuk T. V. Building materials and products Minsk: Dizayn PRO, 2004. 312 p.
20. Domokeev A. G. Building materials. Moscow: Vysshaya shkola. 1989. 495 p.
21. Fokin V. M., Kovylin V. M., Chernyshov V. N. Power efficient methods to determine thermophysical properties of building materials and products. Moscow: Spektr. 2011. 155 p.
22. Kryuchkov O. B., Kopasov E. A., Kovylin A. V. Calculation and experimental determination of parameters at physical modeling metal heating. Izvestiya VolgTU. Seriya «Problemy materialovedeniya, svarki i prochnosti v mashinostroenii». 2012. Iss. 6. No. 9 (96). pp. 175–179.
23. Kryuchkov O. B., Kopasov E. A., Ronenko V. O. Optimization of heating billets with large heat capacity using physical modeling. Izvestiya VolgTU. Seriya «Problemy materialovedeniya, svarki i prochnosti v mashinostroenii». 2013. Iss. 7. No. 6 (109). pp. 135–137.
24. Kryuchkov O. B. Usage of physical modeling to determine temperature field in a billet. Izvestiya Vuzov. Chernaya metallurgiya. 2018. Vol. 61. No. 1. pp. 12–20.
25. Kryuchkov O. B., Ivanov A. S., Kostryukov A. S. Computer modeling for analysis of temperature fields in metal billets to be heated. Izvestiya VolgTU. Seriya «Problemy materialovedeniya, svarki i prochnosti v mashinostroenii». 2014. Iss. 9. No. 9 (136). pp. 127–129.
26. Kryuchkov O. B., Volchkov V. M., Krokhalev A. V. Modeling and heat engineering calculations of processes in heating and thermal furnaces. Part 2. The usage of computing for calculation of metal products heating time: tutorial. Volgograd: VolgGTU. 2017. 184 p.
27. Korneev S. V., Ratnikov P. E., Mendelev D. V. Factors influencing on the accuracy of modeling of metal heating processes in furnaces. Lityo i metallurgiya. 2011. No. 1. pp. 72–78.
28. Tsaplin A. I., Nikulin I. L. Modeling thermophysical processes and objects in metallurgy: tutorial. Perm: Izdatelstvo Permskogo gosudarstvennogo universiteta. 2011. 299 p.

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