Assessment of the unevenness of plastic deformation in drawing high-strength pearlite steel wire

Under the control of plastic properties, the reliability of a preliminary assessment of the unevenness of plastic deformation during repeated drawing of high‑strength wire was compared using the calculated geometric parameter of the wedge‑shaped zone and the experimentally determined metal lift at the entrance to the working cone of the drawing. The geometric parameter of the wedge‑shaped zone does not characterize the effect on the formation of plastic properties of increased strength, the ratio of compressive and tensile stresses in the deformation zone with a change in a single compression, and therefore cannot be used as an indicator of the unevenness of plastic deformation during repeated drawing of high‑strength wire made of pearlite steel. The rise of metal at the entrance to the deformation zone of the drawing tool, determined by drawing on split lugs, is highly sensitive to changes in the main technological parameters of the drawing process and meets the criterion of uneven plastic deformation. To increase the uniformity of deformation during repeated drawing of high‑strength wire, it is necessary to reduce single compressions and reduce the angle of the working cone of the drawing as the total degree of deformation increases, as well as to carry out deformation by drawing with counter‑tension and in the mode of hydrodynamic friction.