Evolution of zinc coatings during drawing process of steel wires

Abstract The paper shows a significant influence of the multi-stage wire drawing technology on deformability and phase transformations in zinc coating. SEM tests proved that coating after hot-dip galvanizing consists number thin layers, ranging from 1 to 5 µm, differing thickness, chemical composition properties. When pulled through die heats up (as result friction between material tool) its dynamic plastic deformation. It resulted fracture partial crushing hard-intermetallic phases. has been proven as passes successive dies, is thinned diffusion well remodelling individual structural components occurs; place ζ, intermetallic δ1 develops, increasing share layer. crystals phases located border outer layers break remain dispersed zinc. An analysis microhardness level increase contingent percentage iron particular