Effect of Fe Content in Coating on Wet Drawing Behavior of Hot-dip Galvanized Steel Wire

In view of the phenomenon of accelerating die wear during wet drawing of steel wire after hot dip galvanization, two different groups of hot dip galvanized steel wire were compared and analyzed by scanning electron microscope（SEM） and energy dispersive spectrometer（EDS）. The effect of Fe content in coating on wet drawing behavior of steel wire was studied. It is found that the content of Fe on the surface of steel wire should be controlled below 7.0wt% after hot dip galvanization. At this time, the surface of the coating is composed of ζ phase or Zn+ζ phase. Wet drawing of steel wire is easy to carry out. When the Fe content on the surface of galvanized layer is more than 7.0wt%, the surface of the coating is δ phase, and it accelerates the die wear after wet drawing, and produces adhesive die and broken wire phenomenon. In the production process, the Fe content in the plating layer needs to be optimized by adjusting the line speed and the wire coating process, in order to carry out wet drawing production, obtain good quality hot-dip galvanized steel wire products.