Galvanized steel wire for high-strength and high-torsion bridge cable and its preparation process

A galvanized steel wire and preparation process technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of wire rod structure uniformity, unstable torsional performance, etc., and achieve excellent tensile strength and torsional performance, Easy operation and uniform tissue effect
CN109055679BActive Publication Date: 2019-12-03武汉钢铁有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉钢铁有限公司
Publication Date
2019-12-03

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Abstract

The invention discloses a zinc-coated steel wire for bridge cable with high-strength and high-torsion and preparation technology thereof, and belongs to the technical field of wire rods for bridge cables. The preparation technology comprises the steps that (1) rolled steel wires with high quality are selected; (2) single-pass or multi-pass pre-drawing is carried out, specifically the reduction rate of the single-pass pre-drawing is less than or equal to 20%, and the front-pass reduction rate of the multi-pass pre-drawing is larger than the rear-pass reduction rate of the multi-pass pre-drawing; (3) off-line heat treatment is carried out, specifically heat treatment is carried out on the obtained rolled steel wires of the step (2) by adopting one kind of salt bath, lead bath or water bath;and (4) the finished product zinc-coated steel wire is obtained by throwing. Compared with an existing preparation technology of general rolled steel wires, the designed preparation technology does not change technology parameters of off-line heat treatment and throwing, the operation is simple, and the feasibility is higher; and the tensile strength of the obtained zinc-coated steel wire is not less than 1860 MPa, the number of torsions is not less than 18 times in the torsion performance, and the service requirement of the bridge cables is met.
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Description

technical field

[0001] The invention relates to a wire rod and a production method thereof, and belongs to the technical field of wire rods for bridge cables, in particular to a galvanized steel wire for high-strength and high-torsion bridge cables and a preparation process thereof. Background technique

[0002] High-strength galvanized steel wire is widely used in important occasions such as bridge cables and suspension cables because of its excellent mechanical properties and good anti-corrosion ability. High-strength galvanized steel wire is made of high-carbon pearlitic steel wire rod. First, it undergoes multi-pass continuous cold-drawing deformation to obtain ultra-high-strength steel wire, and then undergoes hot-dip galvanizing treatment to obtain continuous and well-bonded steel wire surface. Hot-dip galvanized layer, so as to obtain good corrosion resistance.

[0003] Since the high-strength pearlitic steel wire is plastically deformed with a large amount of deform...

Claims

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