A method for controlling surface decarburization of high carbon steel wire rod

By adjusting the air-fuel ratio and temperature control in the heating furnace during the production process of high-carbon steel strips, monitoring the residual oxygen amount of smoke, adjusting the rhythm and residence time of steel installation, the generation of the decarbonized layer on the surface of the high-carbon steel strips was successfully controlled, the performance parameters of the steel strips were improved, and the service life and machiningability of wires and ropes were improved.

CN119753311APending Publication Date: 2025-04-04SHOUGANG SHUICHENG IRON & STEEL GRP
0 Cites 0 Cited by

Patent Information

Application Number
CN202411643869.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The existence of a surface decarbonization layer of high-carbon steel strips leads to weakening of surface metal corrosion, poor phosphating lubrication effect, increased friction, and intensified work hardening, thereby reducing the service life and processability of wires and ropes.

Method used

By adjusting the air-fuel ratio in the heating furnace, the air-fuel ratio between the heating section and the heating section is controlled within the range of 2.1-2.4 and 2.2-2.5, ensuring that the gas in the heating section in the furnace is relatively surplus, and secondary combustion is carried out in the heating section. At the same time, a zirconia residual oxygen analyzer is installed to monitor the residual oxygen amount of smoke, control the temperature of the heating section to be 1080-1130℃, the temperature of the heating section to be 1050-1100℃, and the installation rhythm and residence time are adjusted according to the rolling specifications.

Benefits of technology

The generation of the surface decarbonization layer of high-carbon steel coil strips is effectively controlled, the performance parameters of the steel coil strips are improved, the decarbonization layer does not exceed 10% of the disc circumference, and the thickness of the decarbonization layer is controlled below 20μm, thereby improving the service life and processability of wires and ropes.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention belongs to the technical field of process control of heating furnace area during metal wire production, and in particular, is a method for controlling the surface decarburization of high-carbon steel wire rods. During the production process, according to the calorific value of the mixed gas of the coke oven and converter and the temperature control requirements of each section, the opening of the air and gas valves is adjusted, so that the gas in the soaking section of the heating furnace is relatively excessive, and the remaining gas is secondary burned when passing through the heating section. The present invention can improve the surface decarburization of high-carbon steel wire rods, and improve the original complete decarburization to incomplete decarburization or no decarburization. The incomplete decarburization layer occupies less than 10% of the circumference of the coil, and the thickness of the decarburization layer is controlled to be less than 20μm.
Need to check novelty before this filing date? Find Prior Art