Volgograd State Technical University, Volgograd, Russia

V. F. Danenko, Cand. Eng., Associate Prof., Dept. of Materials Technology, e-mail: omd@vstu.ru
L. M. Gurevich, Dr. Eng., Associate Prof., Head of the Dept. of Materials Science and Composite Materials

The results of experimental studies of the shear resistance of layers of a cylindrical bimetallic conversion blank along the plane of contact between the base (45 steel core) and cladding (12Kh18N10T steel shell, 22 % volume fraction) layers are presented. Combined hot rolling (packet rolling) was carried out using a diamond-square pass system. The effect of the unsteady rolling process on the bond strength of layers in bimetal cross-sections at distances of 150, 300, and 450 mm from the front and rear ends of a 50x50 mm rolled blank was studied. This made it possible to determine the required length of the removed sections of the rolled blank. Statistical analysis of the experimental data showed that removing 300 mm of the front and rear ends of the rolled blank, while achieving an average shear stress of τcp = 300-330 MPa, guarantees the subsequent production of bimetallic wire rod with the required bond strength for successful wire production. Uneven distribution of the cladding around the core in 14.2 mm diameter bimetallic wire rod obtained by hot rolling a composite cylindrical billet of 45 + 12Kh18N10T steel using the oval-square pass system was established. Computer simulation of the rolling process was employed using the SIMULIA/Abaqus software package. The simulation demonstrated the optimal rolling sequence using the round-round, round-oval, and then oval-square pass systems with elongation values of 1.136, 1.263, and 1.282, respectively. This improves the uniformity of the cladding distribution around the core and improves metal finishing during the initial and final rolling using the prefinishing oval-round-round system with elongation values of 1.2, 1.148, and 1.14, respectively.

1. Tananov A. I., Katikhin V. D., Guz I. S. et al. Structure and properties of bimetallic materials. Moscow : Nauka. 1975. 124 p.
2. Dolzhenkov F. E., Pisarenko F. A., Shevchenko Yu. T., Gladkov G. A. Method for manufacturing multilayer rods. USSR copyright certificate, No. 709308. Applied: 06.07.1977. Published: 15.01.1980.

3. Guryev A. V., Gokhberg Ya. A., Shakhpazov Kh. S., Shirvanyan A. S. Method for manufacturing bimetallic wire with a carbon steel core. USSR copyright certificate, No. 330930. Applied: 17.08.1970. Published: 07.03.1972
4. Shatokhin I. M., Tulupov O. N. Roll grooving for production of bimetallic wire rod. Utility model RF, No. 17872. 2001.
5. Danenko V. F., Gurevich L. M., Bulaeva S. A. et al. Production of a round bimetallic billet with a corrosion-resistant steel cladding layer. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. 2020. No. 2. pp. 16–22.
6. Tomczak J., Bulzak T., Pater Z., Wójcik Ł., Kusiak T. Skew rolling of bimetallic rods. Materials. 2021. Vol. 14, Iss. 1. 18. DOI: 10.3390/ma14010018.
7. Guryev A. V., Gokhberg Ya. A., Shakhpazov Kh. S., Shirvanyan A. S. Bimetallic wire rod for production of corrosion-resistant wire. Stal. 1972. No. 7. pp. 661-662.
8. Danenko V. F., Gurevich L. M., Bulaeva S. A. Corrosion resistance of bimetallic wire carbon steel + steel 12Kh18N10T in a soot-gas environment. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. 2015. No. 12. pp. 36-39.
9. GOST 9941-81. Seamless cold- and warm-deformed tubes of corrosion-resistant steel. Specifications. Introduced: 01.01.1983
10. GOST 1050-2013. Metal products from nonalloyed structural quality and special steels. General specification. Introduced: 01.01.2015.
11. Trykov Yu. P., Danenko V. F., Gurevich L. M. et al. Prediction of strength characteristics of bimetallic corrosion-resistant wire. Proizvodstvo prokata. 2009. No. 9. pp. 29-33.
12. Smirnov V. K., Shilov V. A., Inatovich Yu. V. Grooving of rolling rolls: textbook. 2nd edition, revised and enlarged. Moscow : Teplotekhnik, 2008. 490 p.
13. GOST 10885-85. Hot-rolled, corrosion-resistant clad steel sheets. Specifications. Introduced: 01.07.1986.
14. Melnichenko A. S. Statistical analysis in metallurgy and materials science: textbook. Moscow : Izdatelskiy dom MISiS, 2009. 268 p.
15. Khaykin B. E., Zheleznyak L. M. Profile rolling: textbook. Yekaterinburg: UGTU-UPI, 2008. 86 p.
16. Danenko V. F., Trykov Yu. P., Pisarev S. P., Gurevich L. M., Tsyutsyura V. Yu., Bulaeva S. A. Patent RF, No. 2463138. Method for manufacturing bimetallic rods. Applied: 10.05.2011. Published: 10.10.2012. Bulletin No. 28.
17. Shorshorov M. Kh., Tikhonov A. S., Bulat S. I. et al. Superplasticity of metallic materials. Moscow : Nauka, 1973. 220 p.
18. Kaybyshev O. A. Plasticity and superplasticity of metals. Moscow: Metallurgiya, 1975. 280 p.
19. Filippov V. V., Steblov A. B., Isakov S. A. Technology of carbon wire rod production. Lityo i metallurgiya. 2001. No. 1. pp. 65–75
20. Dyja H., Lesik L., Milenin A., Mróz S. Theoretical and experimental analysis of stress and temperature distributions during the process of rolling bimetallic rods. Journal of Materials Processing Technology. 2002. Vol. 125. pp. 731–735. DOI: 10.1016/S0924-0136(02)00378-3
21. Dyja H., Mróz S., Milenin, A. Theoretical and experimental analysis of the rolling process of bimetallic rods Cu-steel and Cu-Al. Journal of Materials Processing Technology. 2004. Vol. 153. pp. 100-107. DOI: 10.1016/j.jmatprotec.2004.04.186
22. Tulupov O. N., Moller A. B., Kinzin D. I. et al. Improvement and development of theoretical approaches and practical solutions in modeling hot rolling of section bars and formation of product quality. Modelirovanie i razvitie protsessov OMD. 2016. No. 22. pp. 3–27.
23. Romantsev B. A., Skripalenko M. M., Vorotnikov V. A. et al. Evaluation of the effect of deformed state parameters and temperature on microstructure of billets from stainless steel in two-high screw rolling. Chernye Metally. 2024. No. 5. pp. 81–86.
24. Danenko V. F., Gurevich L. M. Modeling of rolling of a round bimetallic billet. Modelirovanie i razvitie protsessov OMD. 2015. No. 21. pp. 27–34.
25. Bakhtinov V. B. Rolling production. Moscow : Metallurgiya, 1987. 416 p.
26. Tretyakov A. V., Zyuzin V. I. Mechanical properties of metals and alloys when forming: Handbook. Moscow : Metallurgiya, 1973. 224 p.
27. Grudev A. P. Theory of rolling. Moscow : Metallurgiya, 1988. 240 p.
28. Polukhin P. I., Fedosov N. M., Korolev A. A., Matveev Yu. M. Rolling production: textbook for universities. 3rd edition, revised and enlarged. Moscow : Metallurgiya, 1982. 696 p.