Cherepovets State University, Cherepovets, Russia:

D. Yu. Ermushin, Postgraduate Student, Dept. of Mathematical and Software Support of Computers, e-mail: diuermushin@chsu.ru

Cherepovets State University, Cherepovets, Russia¹ ; RAS Institute of Metallurgy and Material Science named after A. A. Baikov, Moscow, Russia²:

N. L. Bolobanova, Cand. Eng., Associate Prof., Dept. of Metallurgy, Mechanical Engineering and Technological Equipment¹, Doctoral Candidate², e-mail: nlbolobanova@chsu.ru

The article is devoted to the consideration of the solution of an important issue of predicting the surface strain hardening of the barrel of back-up rolls for the campaign. When operating back-up rolls with a working layer of steel containing 5 % chromium or more, the main criterion in determining the amount of removal during regrinding is the requirement to remove the hardening of the barrel. The value of surface strain hardening of the back-up roll barrel determines the regrinding parameters, the possibility of achieving a high roll time and increasing the volume of the rolling campaign. The results of numerical simulation of the stress-strain state of the back-up roll barrel by the finite element method depending on the intensity of the work of the roll during the campaign in the stand of a continuous wide-strip hot rolling mill are presented. A dependence has been established that makes it possible to predict the surface strain hardening of the back-up roll barrel on the length of the rolled strip and the average linear load in the rollto-roll contact along the mill stands. The results of an industrial experiment on measuring the hardening of roll barrels along the stands of a continuous wide-strip hot rolling mill 2000 of PJSC Severstal are presented. A correspondence between the results of numerical and industrial experiments is obtained. The established dependence of determining the value of the increase in the hardness of the back-up roll barrels by the stands of the finishing group of the mill 2000 for the rolling campaign is proposed to be used in a software tool, as an online application. The application is designed to process information about the operation of the finishing group back-up rolls for a selected period and to issue processing results to the roll preparation section of the flat-rolled production of the sheet-rolling department No. 2 of PJSC Severstal.

1. Ivoditov V. А., Trayno А. I., Volshonok I. Z., Rusakov А. D. Modern methods for improvement of the efficiency of sheet-rolling production: monograph. Moscow: Izdatelskiy dom MISiS, 2013. 288 p.
2. Gostev К. А. Roll optimization for lower total cost of ownership. Stal. 2021. No. 10. pp. 19–24.
3. Skorokhvatov N. B., Glukhov V. V., Smirnov V. S., Gostev К. А., Takhautdinov R. S., Lebedev S. А., Nosov V. L., Borovkov I. V., Firkovich А. F. Experience in the operation of modern rolling rolls in the conditions of Severstal, MMK and NLMK. Stal. 2004. No. 1. pp. 40–43.
4. Sokolov P. B. Operation of rolling rolls of JSC "Uralmashzavod" with a chromium content of 3–5%. Stal. 2014. No. 1. pp. 35–37.
5. Polukhin P. I., Zheleznov Yu. D., Polukhin V. P. Thin sheet rolling and roll service. Moscow: Metallurgiya, 1967. 388 p.
6. Tretyakov А. V., Garber E. А., Davletbaev G. G. Calculation and study of rolling rolls. Moscow: Metallurgiya, 1976. 256 p.
7. Polukhin V. P., Nikolaev V. А., Tylkin М. А., Shulman P. Т., Masol V. А., Efimenko S. P., Dunaevskiy V. I., Valchuk G. I., Belkin М. Ya., Venzhega А. S. Reliability and durability of cold rolling rolls. Moscow: Metallurgiya, 1976. 448 p.
8. Kozhevnikov А. V., Kozhevnikova I. A., Bolobanova N. L., Antonov P. V., Anisimov D. A. Improvement of operational efficiency of cold rolling mill work rolls. Journal of Chemical Technology and Metallurgy. 2019. No. 6 (54). pp. 1298–1304.
9. Kozhevnikova I. A., Bolobanova N. L., Antonov P. V., Zhilenko S. V., Kozhevnikov A. V. Development and industrial testing of advanced rolling conditions at 4-stand mill 2100 of PAO Severstal. IOP Conf. Series : Materials Science and Engineering. 2020. Vol. 718. 012008.
10. Muntin А. V., Sevidov А. Е., Tikhonov S. М., Ionov S. М., Zinovyev А. V., Lbyshkina Т. А. Analysis of features of wear of the work rolls of the finishing group of stands in the conditions of the 1950 mill of the VMZ`casting and rolling complex. Metallurg. 2021. No. 3. pp. 57–62.
11. Salganik V. М., Poletskov P. P., Kukhta Yu. B. Algorithms and software product "Profile 2500" for forecasting and evaluating the profile, flatness of hot-rolled strips and the state of the backup rolls of the hot rolling mill 2500. Izvestiya vuzov. Chernaya metallurgiya. 2008. No. 7. pp. 50–54.
12. Borisov V. I., Golubyev V. V. Investigation of wear of sheet rolls of roll systems of quarto hot rolling mills. Vestnik MGTU imeni N. E. Baumana. Seriya Mashinostroenie. 2005. No. 4. pp. 49–62.
13. Nikolaev V. А. Profiling and wear resistance of sheet rolls. Kiev: Tekhnika, 1992. 158 p.
14. Bolobanova N. L., Garber E. А., Yusupov V. S. Development of roll profiling methods for sheet-rolling production. Stal. 2022. No. 11. pp. 18–23.
15. Deryabin N. S., Nikitina N. V., Grigorenko А. S., Shakirov А. А. Investigation of the influence of wear of the work rolls of a wide-strip hot rolling mill and their thermal profile on the transverse and longitudinal variation in the thickness of the strips. Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii. 2020. Vol. 76. No. 9. pp. 931–936.
16. Gostev К. Modern rolls at mills 2000 of the Cherepovets and Magnitogorsk metallurgical plants. Metallurg. 2008. No. 9. pp. 52–55.
17. Kheisterkam P., Schneider Z., Gee V. Pushing the limits of back-up roll materials. Stal. 2019. No. 11. pp. 26–33.
18. Qin X., Sun D., Xie L., Wu Q. Hardening mechanism of Cr5 backup roll material induced by rolling contact fatigue. Materials Science and Engineering. 2014. Vol. 600. pp. 195–199.
19. Qin X., Ren J., Li F., Wang T., Xie L., Wu Q., Zhao X. Degradation of Cr5 backup roll material under rolling contact fatigue. Materials Express. 2016. Vol. 6. No. 4. pp. 357–362.
20. Fu H., Rivera-Díaz-del-Castillo E. J. Approaches to model structural and contact fatigue. Encyclopedia of Materials: Metals and Alloys. 2022. Vol. 4. pp. 576–588.
21. Yin H., Wu Y., Liu D., Zhang P., Zhang G., Fu H. Rolling contact fatigue-related microstructural alterations in bearing steels: A brief review. Metals. 2022. Vol. 12, Iss. 6. pp. 910.
22. Blumenshtein V. Yu. FEM-modeling and calculations of plastic properties of hardened metal in SPD processes. Proceedings of the IX International Scientific and Practical Conference "Innovations in Mechanical Engineering". Barnaul: Polzunov Altai State Technical University, 2018. pp. 478–485.
23. Golenkov V. А., Radchenko S. Yu., Dorokhov D. О., Korotkiy G. P. Scientific foundations of hardening by complex local deformation: monograph. Moscow: Mashinostroenie; Orel: Gosuniversitet – UNPK, 2013. 122 p.
24. Fokin V. G. FEM simulation of thermoplastic hardening of the cylindrical surface of the hole in disks. Proceedings of the International scientific and technical conference "Problems and prospects for the development of engine building". Samara: Samara National Research University named after Academician S. P. Korolev. 2018. pp. 37, 38.
25. Kowalik M., Trzepieciński T., Kukiełka L., Paszta P., Maciąg P., Legutko S. Experimental and numerical analysis of the depth of the strengthened layer on shafts resulting from roller burnishing with roller braking moment. Materials. 2021. Vol. 14, Iss. 19. pp. 5844.
26. Bilalov D. A., Sokovikov M. A., Bayandin Yu. V., Chudinov V. V., Oborin V. A., Naimark O. B. Numerical simulation of plastic strain localization and failure mode transition in metals under dynamic loading. Structural Integrity Procedia. 2016. Vol. 2. pp. 1951–1958.
27. Skoczylas A., Zaleski K., Matuszak J., Ciecieląg K., Zaleski R., Gorgol M. Influence of slide burnishing parameters on the surface layer properties of stainless steel and mean positron lifetime. Materials. 2022. Vol. 15, Iss. 22. pp. 8131.
28. Bogomolov Yu. S., Del G. D., Sedokov L. M. Dependence between hardness and stress of a deformable body. Izvestiya Tomskogo politekhnicheskogo institute imeni S. M. Kirova. 1966. Vol. 147. pp. 14–17.