Журналы →  Non-ferrous Мetals →  2017 →  №1 →  Назад

Название Analysis of energy-force parameters of combined processing for receiving modifying bars from Al – 5 Ti – 1 B alloy
DOI 10.17580/nfm.2017.01.07
Автор Sidelnikov S. B., Galiev R. I., Lopatina E. S., Samchuk A. P.
Информация об авторе

Siberian Federal University, Krasnoyarsk, Russia:

S. B. Sidelnikov, Professor, Head of a Chair “Metal forming”, e-mail: sbs270359@yandex.ru
R. I. Galiev, Assistant Professor of a Chair “Metal forming”
E. S. Lopatina, Assistant Professor of a Chair “Metals Science and Metals Thermal Treatment”
A. P. Samchuk, Post-Graduate Student of a Chair “Metal forming”


The results of theoretical and experimental research of energy-force parameters of the combined rollingextrusion process (CRE) and combined casting and rolling-extrusion process (CCRE) of Al – 5 Ti – 1 B alloy bars are presented. It is proved that bars from this alloy have turned out to be the most effective modifiers for obtaining ingots from aluminum alloys, having fine-grained structure and the required level of mechanical properties. It’s become obvious, that the existing manufacturing process of long-dimensioned deformed semi-finished products performed at casting-rolling equipment and horizontal hydraulic extrusion press does not always give an opportunity to obtain high-quality products due to the appearance of cracks in the process of rolling, and increased energy-power loading of the equipment. New technologies of combined processing (CRE and CCRE) have been proposed. These technologies allow to reduce significantly the energy-force parameters of processing by means of using active frictional forces when combining casting, rolling and extrusion. According to the proposed formulas, the forces influencing the matrix and rolls during the combined processing have been calculated. These results have been compared to the experimental data, thus, the calculated and experimental data are of satisfactory convergence. Metallographic analysis of the structure of bars obtained by means of various methods of combined processing has been carried out. It has been pointed out, that the CCRE method gives an optimal arrangement and the range of intermetallic phases, while the particles are evenly distributed over the cross-section and are dispersed. The results of the tests of mechanical properties have demonstrated that the strength characteristics of the bars from the studied alloy are higher when the CRE process is implemented (temporary tear resistance is up to 213 MPa), while the plastic ones (relative elongation is up to 33.6%) are higher when implementing the CCRE process. The conclusion has been drawn that the CCRE method of manufacturing modifying bars from the Al – 5 Ti – 1 B alloy makes it possible to reduce the energy costs by a factor of 1.5–2.0 compared to the traditional processing methods; and to obtain an increased level of the plastic properties of the metal as well.

Ключевые слова Aluminum alloys, modification, titanium, boron, combined processes, casting, rolling, extrusion, rheological properties, mechanical properties
Библиографический список

1. Napalkov V. I., Makhov S. V. Alloying and modifying of aluminium and magnesium. Moscow : MISiS, 2002. 376 p.
2. Bondarev B. I., Napalkov V. I., Tararyshkin V. I. Modifying of deformed aluminium alloys. Moscow : Metallurgiya, 1979. 224 p.
3. Beletskiy V. M., Krivov G. A. Aluminium alloys. Content, properties, technology, application. Reference book. Ed.: I. N. Fridlyander. Kiev : KOMINTEKh, 2005. 365 p.
4. Elagin V. I. Alloying of deformed aluminium alloys with transition metals. Moscow : Metallurgiya, 1975. 248 p.
5. Cibula A. The Grain Refinement of Aluminium Alloys Castings by Addition of Titanium and Boron. Journal of the Institute of Metals. 1951/52. Vol. 80. pp. 1–16.
6. Maltsev M. V. Modern methods of improvement of structure and physicochmical properties of non-ferrous metals. Moscow : VINITI, 1957. 28 p.
7. Maltsev M. V. Modification of metal and alloy structure. Moscow : Metallurgiya, 1964. 213 p.
8. Makhov S. V. Scientific and Technological Substantiation of Development and Application of Inoculating Master Alloys. Metallurgiya mashinostroeniya. 2012. No. 1. pp. 10–15.
9. Marcantonio J., Mondolfo L. Grain Refinement in Aluminum Alloyed with Titanium and Boron year. Metallurgical and Materials Transactions. 1971. Vol. 2, No. 2. pp. 465– 471.
10. Wang X., Song J., Vian W., Ma H., Han Q. The interface of TiB2 and Al3Ti in molten aluminum. Metallurgical and Materials Transactions: B. 2016. Vol. 47, Iss. 6. pp. 3285–3290.
11. Wei Z., Gao X., Feng Z. Application of Al – Ti – B wire in the new high strength wear resistant piston materials. Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys. 36(8), pp. 874–876.
12. Xu-Guang An, Y. Liu, Jin-Wen Ye, Lin-Zhi Wang, Peng-Yue Wang. Grain refining efficiency of SHS Al – Ti – B – C master alloy for pure aluminum and its effect on mechanical properties. Acta Metallurgica. 2016. Vol. 29, No. 8. pp. 742–747.
13. Rakhmonov J., Timelli G., Bonollo F. The influence of AlTi5B1 grain refinement and the cooling rate on the formation behaviour of Fe-rich compounds in secondary AlSi8Cu3 alloys. Metallurgia Italiana. 2016. 108 (6). pp. 109–112.
14. Wang X., Han Q. Grain refinement mechanism of aluminum by Al – Ti – B master alloys. Light Metals. 2016.
15. Zhang Z., Wang J., Xia X., Zhao W., Liao B., Hur B. The microstructure and compressive properties of aluminum alloy (A356) foams with different Al – Ti – B additions. Medziagotyra. 2016. Vol. 22, No. 3. pp. 337–342.
16. Wang X., Han Q. Grain refinement mechanism of aluminum by Al – Ti – B master alloys. TMS Light Metals. 2016. pp. 189–193.
17. Sidelnikov S. B., Lopatina E. S., Dovzhenko N. N. et al. Peculiarities of structure-formation and metal properties during the high-velocity crystallization, deformation and modification of aluminium alloys : multi-authored monograph. Krasnoyarsk : Sibirskiy Federalnyy Universitet, 2015. 180 p.
18. Avitzur B. Combining Extrusion and Rolling. Wire journal. 1975. pp. 73–80.
19. Sidelnikov S. B., Dovzhenko N. N., Zagirov N. N. Combined and joint methods of processing of non-ferrous metals and alloys : monograph. Moscow : MAKS Press. 2005. 344 p.
20. Grishchenko N. A., Sidelnikov S. B., Gubanov I. Yu. et al. Mechanical properties of aluminium alloys. Krasnoyarsk : Sibirskiy Federalnyy Universitet, 2012. 196 p.
21. Sidelnikov S. B., Voroshilov D. S., Startsev A. A. et al. Research Parameters of Combined Processing for Producing Ligature Rods from Alloy System Al – Ti – B. Zhurnal Sibirskogo federalnogo universiteta. Tekhnika i tekhnologii. 2015. Vol. 8., No. 5. pp. 646–654.

Полный текст статьи Получить