Abstract
It is stated that during metal processing at contact interaction of a processed workpiece and a tool on the metal surface the layer is formed which is not subjected to pickling. In scientific literature this layer is denoted as “white layer”. Drawing is characterized by dissimilar strain state of the processed wire that is why it is proposed to combine it with torsion in order to improve its effectiveness. Results of simulation of combined deformational processing by drawing with torsion in Deform-3D software were presented in the paper. It was shown that after application of torsion deformation the level of compression strain on the contact surface between the wire and the die decreases. Investigation of high carbon steel wire microstructure peculiarities on the surface after combined deformational processing by drawing with torsion was performed. It was shown that white layer thickness on the surface of the processed wire decreased with torsion rate increase. Effect of torsion rate on high carbon steel wire at combination of drawing with torsion was examined. High carbon steel wire with 0.7%C tensile strength did not change significantly, but relative elongation increased at torsion rate growth.
Keywords
White layer, high carbon steel wire, combined deformational processing, drawing, torsion, microstructure, mechanical properties.