Federal State Autonomous Educational Institution of Higher Professional Education «Ural Federal University named after the first President of Russia B. N. Yeltsin», Yekaterinburg, Russia:

Yu. N. Loginov, Professor, e-mail: unl@mtf.ustu.ru

Yu. V. Inatovich, Assistant Professor

Joint Enterprise «Katur-Invest» LLC, Verkhnyaya Pyshma, Russia:
A. Yu. Zuev, Senior Technologist

Area of research is process of continuous casting and hot rolling of the copper rough wire preparation for the subsequent drawing of a wire of electrotechnical appointment. Calculations of parameters of the deformed condition accompanying process of rolling of oxygen containing copper on the MANNESMANN DEMAG SACK rolling mill in the casting — rolling line CONTIROD are executed. The obtained data are compared with mechanical properties of copper with allocation of areas of strains, temperatures, and strain ratios, characteristic for production. The range of change of strain on the rolling passes within 0,227–0,592, and also a range of strain ratios within 1,05–334 s^–1 is established. It is revealed that in rolling passes in the draft group of rolling stands possibly development of the Portevin — Le Chatelier effect (PLC). It is revealed that for the first two passes of the rolling lowered loads of a drive of the rolling mill that speaks development of the mentioned effect are characteristic. It is assumed that local fall of deformation resistance in areas of the increased strains can lead to the deformation localization in these areas and to receiving a picture of the non-uniform deformed condition. It is revealed that calculation of deformation resistance for known approximating dependences leads to the essential overestimate of results at the increased values of strains and, especially, in draft passes of rolling. The obtained settlement data are compared to results of measurement of loadings on the industrial rolling mill and qualitative convergence of results is shown.

1. Loginov Yu. N., Mysik R. K., Titov A. V., Romanov V. A. Liteyshchik Rossii — Russian Foundary worker. 2008. No. 10. pp. 36–38.
2. Loginov Yu. N., Inatovich Yu. V., Zuev A. Yu. Proizvodstvo Prokata — Rolled Products Manufacturing. 2010. No. 2. pp. 14–19.
3. Khenzel A., Shpittel T. Raschet energosilovykh parametrov v protsessakh obrabotki metallov davleniem (Calculation of energy-power parameters in the processes of plastic metal working). Moscow : Metallurgiya, 1982. 360 p.
4. Brovman M. Ya. Tekhnologiya legkikh splavov — Technology of light alloys. 1980. No. 8. pp. 26–30.
5. Tanner Albert B., McDowell David L. Deformation, temperature and strain rate sequence experiments on OFHC Cu. International Journal of Plasticity. 1999. Vol. 15. pp. 375–399.
6. Bhattacharyya A., Rittel D., Ravichandran G. Effect of strain rate on deformation texture in OFHC copper. Scripta Materialia. 2005. Vol. 52. pp. 657–661.
7. Polukhin P. I., Gorelik S. S., Vorontsov V. K. Fizicheskie osnovy plasticheskoy deformatsii (Physical basis of a plastic deformation). Moscow : Metallurgiya, 1982. 584 p.
8. Halim Herdawandi, Wilkinson David S., Niewczas Marek. The Portevin – Le Chatelier (PLC) effect and shear band formation in an AA5754 alloy. Acta Materialia. 2007. Vol. 55. pp. 4151–4160.
9. Dudova N. R., Kaybyshev R. O., Valitov V. A. Fizika metallov i metallovedenie — The Physics of Metals and Metallography. 2008. Vol. 105. pp. 105–112.
10. Mogucheva A. A., Nikulin I. A., Kaybyshev R. O., Skorobogatykh V. N. Metallovedenie i termicheskaya obrabotka metallov — Metal Science and Heat Treatment. 2010. No. 3. pp. 42–49.
11. Polukhin P. I., Gun G. Ya., Galkin A. M. Soprotivlenie plasticheskoy deformatsii metallov i splavov (Resistance of plastic deformation of metals and alloys). Moscow : Metallurgiya, 1983. 352 p.
12. Prasad Y. V. R. K., Rao K. P. Processing maps and rate controlling mechanisms of hot deformation of electrolytic tough pitch copper in the temperature range 300–950 ^оC. Materials Science and Engineering A. 2005. Vol. 391. pp. 141–150.
13. Smirnov V. K., Shilov V. A., Inatovich Yu. V. Kalibrovka prokatnykh valkov (Roll pass design). Moscow : Teplotekhnik, 2010. 490 p.