Effect of distribution of non-metallic inclusions on wire damage in the process of drawing

The aim of the study is to investigate the stress-strain state and probability of the workpiece damage in the process of drawing, considering the structure of rolled wire as a heterogeneous medium. The study deals with heterogeneity of the structure of rolled wire in the form of nonmetallic inclusions in a steel wire drawing process. The results of metallographic studies of the hot-rolled rod and the analysis of non-metallic inclusions with the scanning electron microscope are shown. The plasticity curve of a high carbon wire rod made of grade 80 steel was defined and finite-element simulation of the steel wire drawing process with different distribution of non-metallic inclusions in the cross section of the workpiece using Simulia Abaqus program was performed. Investigation of the effect of structural heterogeneity on the stress-strain state of the workpiece in the drawing process with the use of finite element modeling allowed to determine maximum total deformation of the steel wire depending on the distribution of non-metallic inclusions. The results of finite element modelling of the drawing process of the steel wire made of grade 80 steel according to the industrial technological route are presented.