Ultra-low carbon steel fine wire drawing method

Abstract

The invention discloses an ultra-low carbon steel fine wire drawing method, which comprises a first stage of drawing process, a recrystallization annealing process, and a second stage of drawing process. According to the first stage of drawing process, the total deformation is calculated to be 75 percent to 85 percent according to a wire rod axial circle area. The method is applicable to the processing field of products such as copper-clad steel wires and electronic leading wires. The cold plastic deformation is hardly carried out during a second-time rapid processing and hardening process, so that the occurrence of the phenomenon that the tensile strength of middle wires is too high can be effectively avoided, the wire breaking rate can be remarkably reduced, the middle wires are prevented from being processed and hardened excessively, and the die loss is reduced; the finished products i.e. fine wires obtained according to the method provided by the invention can meet the requirement of low tensile strength. The ultra-low carbon steel fine wire drawing method provided by the invention has no special requirement on drawing equipment, is applicable to a common connecting tank drawing machine, and has no need to increase equipment and reformation investment; the diameter of each winding drum can be equal or unequal; and the ultra-low carbon steel fine wire drawing method provided by the invention is applicable to ultra-low carbon steel with the carbon content being not more than 0.05 weight percent, and the raw material steel types are wider.

Description

technical field [0001] The invention belongs to the field of plastic processing of metal materials, in particular to a method for drawing filaments of ultra-low carbon steel. Background technique [0002] The wire drawing process is widely used in the field of metal material processing, and the ultra-low carbon steel is mainly used for copper-clad steel wire and electronic leads. During the cold drawing process, the structure and mechanical properties of the steel wire change, resulting in work hardening. As the degree of cold deformation increases, the tensile strength, hardness, elastic limit, etc. of general steel wire increase, while the elongation, reduction of area, etc. decrease. In the process of drawing filaments, the problems of high tensile strength and broken wires of finished wires caused by work hardening are particularly prominent. Due to the broken wire when drawing the filament, the re-threading of the mold is delayed, and the tensile strength is not suita...

AI Technical Summary

Problems solved by technology

Patent No. CN201510596501.5 provides a method for drawing round steel and a device for drawing round steel. From the perspective of simplifying the process and improving production efficiency, it proposes a double-mode continuous drawing method, but this The limitation of this method is that the total deformation of the two passes cannot be too large, and in addition to simplifying the process, the serious work hardening effect cannot be effectively avoided

[0004] Most of the above methods are to obtain filaments of required specifications, and less attention is paid to the work hardening of wire rods during the drawing process.