Combined rolling-extrusion of rods from alloy Al-0.5 REM using billet after electromagnetic mold

Abstract

The article presents experimental data for obtaining round rods from an Al alloy containing 0.5 % rare earth metals (REM) using combined rolling-extrusion (CRE) from a round billet having Ø 12 mm, obtained in an electromagnetic mold (EMM). The variable parameters were the billet temperature, the degree of deformation, and the deformation rate. With the help of tensometric equipment, experimental data were obtained on the forces acting on the rolls and the die of the unit CRE-200 for combined processing in the process of producing rods with a diameter of 5 and 9 mm. An assessment of the dependence of the mechanical properties of rods on variable factors has been carried out. The highest strength properties are exhibited by a rod obtained by the mode at a temperature 480ºC and a strain rate 0.74 s -1 . During increasing of the rate of deformation, the plastic properties of the rods increase. The tensile strength of rods obtained by the EMM+CRE method averages 120 -135 MPa. The plasticity of the deformed products in all modes is at a high level (A = 15 -25 %), which allows further processing with a minimum number of intermediate annealings. The research was supported by a grant from the Russian Science Foundation No 23-29-00028, https:// rscf.ru/project/23-29-00028/.