DOI: 10.18503/1995-2732-2024-22-4-70-80
Abstract
The results of analytical and experimental studies of the process of ingotless rolling-extrusion for the processing of secondary waste from the press production of AD31 alloy are presented. The analysis of scientific and technical literature was carried out and it was found that the use of combined processing methods to obtain long-deformed semi-finished products from non-ferrous metal alloys allows to increase the yield of usable metal and to ensure a rapid transition from one standard size to another with relatively high productivity. Therefore, the method of ingotless rolling-extrusion, implemented in units for combined casting, rolling and pressing, was chosen for research. At the first stage of the research, the feasibility of the process was determined using the analytical method of power balance. To determine the energy-power parameters, a technique was developed using the formulas obtained by the authors. With its help, the analysis of thermal deformation treatment processes for obtaining rods from AD31 alloy at the combined processing units SPP-200 and SPP-400 was carried out and the critical values of the forces acting on the rolls and the matrix, mill torque, as well as the power of the drive motors of the rolls having a closed box groove for various processing conditions were established. Experimental studies were carried out to obtain batches of rods with a diameter of 9 mm from waste from the press production of AD31 alloy and the technological parameters of the ingotless rolling-extrusion process during pressing with an extract of 4 and 9.7 were clarified, while the melt temperature was 760 ± 10°C; the temperature of the crystallized workpiece was 520°C; the rotation frequency of the rolls was 5 rpm; the degree of deformation during rolling was 50%. Studies of the metal structure have shown that the rods obtained from the waste of the press production of the AD31 alloy by the method of ingotless rolling-extrusion are characterized by a fibrous fine-grained structure. This structure allows to obtain a high level of plastic and strength properties, which in the hot-pressed state meet the requirements of GOST 21488-97. Thus, the results of the conducted research allow to recommend the method of ingotless rolling-extrusion for obtaining long-length rods with a high level of strength and plastic properties from the waste of the press production of AD31 alloy.
Keywords
aluminum alloys, secondary waste, ingotless rolling-extrusion, ligature rods, energy-strength parameters, structure, mechanical properties
For citation
Sidelnikov S.B., Lopatina E.S., Kuzin D.I., Parubok A.V. Experimental and Analytical Assessment of Feasibility and Energy-Power Parameters of Ingotless Rolling-Extrusion Process of Rods From AD31 Alloy Waste. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2024, vol. 22, no. 4, pp. 70-80. https://doi.org/10.18503/1995-2732-2024-22-4-70-80
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