Production method of large-elongation aluminum clad steel wire

Abstract

The invention provides a production method of a large-elongation aluminum clad steel wire. The production process comprises the following steps of (1) derusting and drawing a high-carbon hot rolled wire rod to form a steel wire with the required wire diameter; (2) conducting austenitizing on the steel wire and conducting isothermal transformation through a lead bath to obtain the steel wire with the sorbite structure; (3) conducting online acid pickling on the steel wire with the sorbite structure to remove lead slag and oxide skin on the surface layer to obtain the steel wire with the clean surface; (4) cladding an aluminum layer on the surface layer of the steel wire with the clean surface through continuous extrusion cladding treatment to obtain a clad blank; (5) drawing the clad blankto be deformed to form the aluminum clad steel wire; and (6) conducing ageing treatment on the aluminum clad steel wire through an induction heating device. Through the production method, the production efficiency is high; and the problem that the hardness of an aluminum layer of the aluminum clad steel wire subjected to ageing treatment is reduced, and the aluminum clad steel wire is scratched inthe subsequent stranding process is solved. Compared with a traditional method that it needs to take 4-24 h of conduct heating and heat preservation during low-temperature long-time ageing treatment,the production method provided by the invention has the advantage that the induction heating device only needs 0.1-2.0 min to conduct online ageing treatment.

Description

technical field [0001] The invention relates to the technical field of cable conductors, in particular to a production method of aluminum-clad steel wire with a large elongation rate. Background technique [0002] Aluminum-clad steel wire is a bimetal composite material coated with a layer of aluminum on the steel core material. It is often used in overhead line products, including conductor reinforcement cores, ground wires, transmission lines, etc., and can also be used as load-bearing cables or pull wires. Compared with galvanized steel wire, aluminum-clad steel wire has the following advantages: (1) better corrosion resistance, (2) smaller specific gravity, (3) good electrical conductivity, (4) more combinations of aluminum layer thickness and steel wire strength , has great design flexibility, and can meet the service requirements in special environments such as salt spray areas, large spans, and heavy ice areas. [0003] However, compared with galvanized steel wire, t...

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Problems solved by technology

[0004] Technical problem: The purpose of this invention is to provide a production method of large elongation aluminum-clad steel wire, which adopts the induction heating aging treatment process, without reducing the hardness of the aluminum layer of the aluminum-clad steel wire, to improve production efficiency and aluminum-clad steel wire The elongation rate solves the problem of low elongation rate of aluminum-clad steel wire after cold drawing, and the softening of the aluminum layer after low temperature and long-term aging treatment, which cannot meet the production requirements of the stranded wire. It improves production efficiency and obtains comprehensive Aluminum-clad steel wire products with excellent performance

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