Festigkeitsabfall in Stahldrähten beim Feuerverzinken

Hot dip galvanizing induced strength decrease in wire steels Wire steels C80D and C80D Nb obtained by hot dip galvanizing procedure were investigated by optical and electron microscopy as well as by X‐ray analysis. The investigations were carried out at different stages of production of wires. The results of the investigations were checked by micro‐hardness measurements. Arising of cracks in wires surface during hot dip galvanizing as a reason for decrease in tensile strength was established. Influences of technological parameter such as galvanizing velocity, type of cooling and residual stresses and strength of wires before galvanizing on cracking of wire was taken in consideration.