DOI: 10.18503/1995-2732-2022-20-4-47-57
Abstract
Improvement of technologies for the production of long deformed semi-finished products from aluminum alloys in rods, sections, wire, and other types of the products is a currently relevant objective of metallurgical production. This is especially important for manufacturing extruded products of a small cross-section, since their production technologies are currently characterized by relatively high labor and energy intensity. This paper describes how the problem of reducing these technical and economic indicators is solved by using the direct extrolling method contributed to manufacturing such extruded products from the melt in a single cycle and in one processing unit of continuously operated equipment. To accomplish this objective regarding the production of rods from aluminum alloy 6082, the authors carried out theoretical and experimental studies, whose results contributed to recommending the developed technology for implementation in production. Thus, using the variational principle of minimum total power and power balance, the authors determined feasibility and main technological parameters of the direct extrolling process for producing rods of a small cross-section from the alloy under study. The experimental studies carried out on the CCRE-2.5 combined processing unit (combined casting, rolling and extrusion) showed that mechanical properties of rods from alloy 6082 produced by the direct extrolling method met the requirements of international standards and were comparable to the properties of rods from this alloy manufactured under production conditions by hot extrusion. It has also been found that in case of rolling and extrusion on a unit with a caliber of 19×42 mm maximum force at 400℃ on the rolls and the die does not exceed 1 MN, while in case of cyclic extrusion according to the conventional technology an extruder with a force of 20 MN is used. The results of the studies performed are also recommended for developing the technology for the production of calibrated rods from alloy 6082 manufactured by drawing of hot extruded rods manufactured by direct extrolling.
Keywords
aluminum alloys, direct extrolling, extrusion, rods, power parameters, annealing, mechanical properties
For citation
Sidelnikov S.B., Bersenev A.S., Gorbunov J.A., Zagirov N.N., Lopatina E.S., Voroshilov D.S., Durnopyanov A.V. Developing and Studying the Process of Direct Extrolling of Rods from Aluminum Alloy 6082. Vestnik Magnitogor-skogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Tech-nical University]. 2022, vol. 20, no. 4, pp. 47-57. https://doi.org/10.18503/1995-2732-2022-20-4-47-57
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