Аңдатпа
The paper presents the results of computer modeling of a new technology for bar scrap recycling, which includes two processing technologies: radial-shear rolling and drawing.At the first stage, the initial billet in the form of a reinforcement profile with a diameter of 16 mm is heated to 1000 °C and rolled on a radial-shear rolling mill to a diameter of 14 mm.The purpose of this stage is to remove the reinforcement ribs, both longitudinal and transverse.At the second stage, the billet is cooled to 800 °C and rolled on a radial-shear rolling mill from a diameter of 14 mm to 10 mm in 2-4 passes, depending on the technological capabilities of the mill.The goal of this stage is to implement severe plastic deformation in the metal of the deformable billet in order to obtain a gradient ultrafine-grained structure in it.At the third stage, the rolled billet is cooled to 20 °C and drawn from a diameter of 10 mm to a diameter of 8 mm in 2 passes.The purpose of this stage is to align the helical surface obtained after radial-shear rolling, and to obtain a high-quality commercial product in the form of a bar (wire) of circular cross-section with a gradient ultrafine-grained structure along the cross-section.