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METAL PROCESSING
Название Development of a method for obtaining thin-walled parts of a spherical shape from aluminum alloy 1580
DOI 10.17580/tsm.2023.07.11
Автор Sidelnikov S. B., Ber V. I., Lopatina E. S., Voroshilova M. V.
Информация об авторе

Siberian Federal University, Krasnoyarsk, Russia:

S. B. Sidelnikov, Professor, Chair for Metal Forming, Doctor of Technical Sciences, e-mail: sbs270359@yandex.ru
V. I. Ber, Associate Professor of the Chair for Metal Forming, Doctor of Technical Sciences, e-mail: kafomd_1@mail.ru
E. S. Lopatina, Associate Professor, Chair for Metal Science and Heat Treatment of Metals Named after V. S. Biront, Candidate of Technical Sciences, e-mail: eslopatina@mail.ru
M. V. Voroshilova, Postgraduate Student of the Chair for Metal Forming, e-mail: aniram1988@yandex.ru

Реферат

The challenge of obtaining spherical thin-walled parts of large diameter with the same wall thickness from scandium-alloyed aluminum alloys of the Al-Mg system used in the rocket and space industry leads to the search for new technical and technological solutions. The article presents the results of research of the process of obtaining thin-walled spherical shells with a relative thickness A = (S/D)·100 ≤ 0.5 from a new alloy 1580 of the Al – Mg system economically alloyed with scandium. This alloy, despite the minimum (up to 0.1% (wt.)) content of scandium, which determines its low cost, can be easily processed by pressure. This makes it possible to manufacture deformed semi-finished products from it with an increased level of strength and plastic properties. At the first stage of research in laboratory conditions, the modes of rolling sheet semi-finished products from this alloy with a thickness of up to 2 mm were developed. For the production of pilot batches of flat products from largesized ingots of alloy 1580 under industrial conditions, the results of laboratory studies and computer simulation of the hot and cold rolling process were used. It has been established that the obtained experimental and industrial samples of sheet products have the necessary structure, which determines the high level of mechanical properties required for further cold deformation. For the manufacture of thin-walled spherical shells, a new drawing method has been developed, which provides for the preliminary operation of forming annular ribs. This ensures that, during subsequent drawing (due to deformation of the obtained ribs and final calibration), the manufacture of a part with the same thickness throughout the volume, and also reduces the number of transitions and heat treatment operations. To implement this method, dies have been developed and the sequence of operations for manufacturing spherical shells has been determined.
The work was carried out within the framework of the state task for science of the Siberian Federal University, project number FSRZ-2020-0013.

Ключевые слова Aluminum alloys, rolling, sheets, spherical shells, sheet stamping, structure, mechanical properties
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