Through optimizing temperature control process the mechanical properties of wire rod can be improved.
According to the wire rod organization mechanism transformation during production, combined with the requirements of the production conditions of each steel specification, targeted adjustment of the heating temperature, spitting temperature and the operation of cooling fans can improve the mechanical properties of medium and high carbon steel wire rods.
By the gradual heating of the sections changed to improve the heating section temperature, reduce the temperature of soaking section. That will keep the billet temperature to be same and uniformity in its core and side during the soaking section.
According to the actual situation and products specifications to regulate the spinning temperature, so that there is proper balance between the tensile strength of the rolled wire rod and the face shrinkage rate.
Referencing metallographic organization, optimize the opening degree of the cooling fan, improve the cooling rate of the wire rod in the cooling roller conveyor, reduce or avoid the harmful organization of reticulated ferrite caused by improper cooling speed for medium and high carbon steel, and final product can be easy drawn.
In the low-temperature season, adjust the number of cooling fans, to close the controlled cooling fan after the end of the phase change to reduce the cooling rate of the wire rod, to achieve the high-temperature tempering on-line aging heat treatment, that can avoid internal stresses due to excessive cooling speed and reduce the probability of brittle breakage at drawn.
