Abstract
A general idea of the steel cord and the process of drawing a thin steel wire is given. It has been determined that the properties of a thin wire influences the properties of a steel cord. At the stage of fine drawing and twisting into a steel cord, the wire receives the final set of mechanical properties. It has been determined that the properties of a thin wire are influenced by the degree of deformation, the rate of deformation at the stage of drawing, and the uniform of deformation. The necessity of increasing the uniformity of the distribution of deformations in the process of drawing a thin wire is determined. Increasing the uniformity of the microhardness distribution shows an increasing the uniformity of the deformation’s distribution. High uniformity of deformation distribution increases the technological properties of the wire, increases its quality. The influence of the drawing a thin wire speed on the mechanical properties is investigated. The influence of the drawing speed on the uniformity of the deformation’s distribution in the cross-section of a thin wire was investigated by the method of measuring the microhardness. Diagrams of distribution of values of microhardness on wire cross-section for the studied drawing speeds are presented. Microhardness values can be used to determine the mechanical properties of the wire samples. This makes it possible, by measuring the microhardness of the wire cross section, to assess the nature of the metal mechanical properties distribution in the wire cross section. The optimal drawing speed is shown at which the most uniform distribution of deformations is observed. The dependence of the microhardness over the wire cross section average value on the drawing speed is proposed. With an increase the drawing speed, the microhardness of the wire increases.
Published Version
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