Steel wire joint reinforcing method

Abstract

The invention discloses a steel wire joint reinforcing method, and provides a method for reinforcing a steel wire joint, and the method can prevent a welding position in a drawing process from generating a broken end phenomenon to reduce breakage. The steel wire joint reinforcing method comprises the following steps: clamping a polished welding seam at a tempering jaw, intermittently rising the temperature of the steel wire joint by 6-8 times with an interval being 3-4 seconds, and stopping rising the temperature of the steel wire joint when the temperature is 830 DEG C to 850 DEG C; continuously rising the temperature of the steel wire joint to 830 DEG C to 850 DEG C when the steel wire joint is naturally cooled to a temperature of 650 DEG C in air, stop rising the temperature of the steel wire joint, repeating the cooling and temperature rising process for three to four times, and then naturally cooling the steel wire joint to 650 DEG C in air; then, continuously rising the temperature of the steel wire joint to 830 DEG C to 850 DEG C, and intermittently heating the steel wire joint and preserving the heat for one minute; when the steel wire joint is naturally cooled to a temperature of 570-590 DEG C, instantaneously electrifying to rise the temperature of the steel wire joint for 10-20 DEG C, and then, naturally cooling the steel wire joint. According to the method, high-temperature tempering treatment is carried out at a welding point, so that internal stress generated during welding is reduced, and toughness of the welding point is improved, and therefore, the welding position in the drawing process is prevented from generating a broken end phenomenon, and the breakage is reduced.

Description

technical field [0001] The invention relates to a production process of steel wire, in particular to a method for reinforcing steel wire joints. Background technique [0002] In the wire drawing production process, the welding of the head of the raw material wire rod is carried out in order to realize continuous production. The welded area generally undergoes nine high-speed drawing passes, and the total compression rate is usually around 80%. [0003] Due to the influence of high welding temperature during welding, carbides are easy to accumulate and grow in the grain boundary of high carbon steel wire rod, and the grain grows fast, which reduces the strength of the joint. At the same time, the thermal conductivity of high-carbon steel is worse than that of low-carbon steel, so rapid cooling in the molten pool and the affected area is likely to produce brittle structures, resulting in a decrease in the toughness of the weld. Due to the reduction of the strength and to...

AI Technical Summary

Problems solved by technology

[0003] Due to the influence of welding high temperature during welding of high carbon steel wire rod, carbides are easy to accumulate and grow at the grain boundary, and the grain grows fast, which reduces the strength of the joint

At the same time, the thermal conductivity of high-carbon steel is worse than that of low-carbon steel, so rapid cooling in the molten pool and the affected area is likely to produce brittle structures, resulting in a decrease in the toughness of the weld

Due to the reduction of the strength and toughness of the welding point, and the large amount of deformation during the drawing process of the steel wire, it is easy to break the wire during the multi-pass high-speed drawing process at the welding point, which not only affects the production efficiency, but also affects the personal life of the operator. Security also poses a certain threat