Method for reinforcing steel wire joint

Abstract

The invention discloses a method for reinforcing a steel wire joint, and provides a method for reinforcing a steel wire joint, which can prevent a breakage phenomenon in a welding position in a pulling process, and reduce a breakage rate. The method comprises the steps of clamping a welding seam part which is polished in a tempering jaw, rising a temperature intermittently for 6-8 times and stopping temperature rising till the temperature is 830-850 DEG C, wherein an interval between the temperature rising of every two times is 3-4 seconds; continuously rising the temperature to 830-850 DEG C when naturally cooling to 650 DEG C in air, stopping temperature rising, repeating the above cooling-temperature rising process for three to four times, and afterwards naturally cooling to 650 DEG C in air; then continuing to rise the temperature to 830-850 DEG C and then preserving temperature for 1 minute through intermittent heating; and after naturally cooling to 570-590 DEG C, electrifying for temperature rising by 10-20 DEG C instantly, and naturally cooling. According to the method, high temperature tempering processing is performed in a welding position, an internal stress generated during welding is reduced, the tenacity at a welding head is improved, the breakage phenomenon in the welding position in the pulling process is prevented, and the breakage rate is reduced.

Description

technical field [0001] The invention relates to a production process of steel wire, in particular to a Steel wire joint reinforcement method . 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 typically undergoes nine passes of high-speed drawing, with a total compression rate usually around 80%. [0003] Due to the influence of welding high temperature during welding of high carbon steel wire rod, carbides are easy to accumulate and grow in the grain boundary, and the grain grows fast, which reduces the joint strength. 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 th...

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