Dependence of deformation indices on initial yield strength and hardening intensity of wire material in the passage of drawing route

Abstract

The model of hardening is considered, which provides for dependence of the current yield strength σт on the product of the initial yield strength σт0 and drawing coeffi cient μ to the degree of hardening coeffi cient k (σт = σт0μk). Difference of axial stress increase from action of anti-tension in absence and action of hardening depending on hardening coeffi cient is determined. Dependencies of drawing stress, safety factor I.L. Perlin and stress state index V.L. Kolmogorov on hardening coeffi cient at different values of initial yield strength are built. Limit hardening factor k is defi ned, at which safety factor is equal to 1. Dependencies of deformation indices on initial yield strength of σт0 at different deformation parameters are constructed.