High-strength and high-toughness bridge cable zinc-coated steel wire and preparation method thereof

A galvanized steel wire and cable technology, applied in the field of bridge cable steel wire, can solve the problems of energy-consuming process, poor torsional performance, low strength, etc., and achieve the effects of improving working conditions, reducing production costs, and avoiding damage to plasticity and toughness.

Active Publication Date: 2019-01-29
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims to propose a high-strength and tough bridge cable galvanized steel wire and its preparation method to solve the problems of low strength, poor torsional performance, energy consumption and complicated process of bridge cable galvanized steel wire in the prior art

Method used

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  • High-strength and high-toughness bridge cable zinc-coated steel wire and preparation method thereof
  • High-strength and high-toughness bridge cable zinc-coated steel wire and preparation method thereof
  • High-strength and high-toughness bridge cable zinc-coated steel wire and preparation method thereof

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preparation example Construction

[0043] A method for preparing galvanized steel wire for high-strength bridge cables, the specific steps of the method are as follows:

[0044] Step 1: Hot rolling: heat the continuous casting slab to a certain temperature and then anneal and heat-preserve it to ensure that the composition of the slab is completely uniform, and then roll it through multiple passes. hot-rolled bars;

[0045] Step 2: hot drawing: the hot-rolled bar is hot-drawn at high temperature to obtain bridge cable steel wires with different size requirements;

[0046] Step 3: Austempering: Austempering the hot-rolled steel wire in Step 2, keeping it warm for several hours, and then taking it out and air cooling to room temperature;

[0047] Step 4: Surface treatment: pickling, washing and spraying the hot-rolled steel wire to remove the industrial salt attached to the surface and the scale produced by decarburization;

[0048] Step 5: Hot-dip galvanizing: Send the surface-treated steel wire into the galv...

Embodiment 1

[0056] A high-strength and toughness bridge cable galvanized steel wire, the chemical composition of the steel wire is: C 0.75%, Si 1.40%, Mn 1.55%, Cr 0.90%, Al 1.10%, Mo 0.10%, Co 0.90%, Nb 0.02%, the balance is Fe and impurity elements.

[0057] A method for preparing galvanized steel wire for high-strength bridge cables, the specific steps of the method are as follows:

[0058] Step 1: Hot rolling: heat the continuous casting slab to 1200°C and keep it warm for 6 hours to ensure that the composition of the slab is completely homogenized, and then hot rolling at 1050°C for 5 to 8 times. hot-rolled bars;

[0059] Step 2: Hot drawing: the hot-rolled bar is hot-drawn at a high temperature of 800°C to obtain bridge cable steel wires with different size requirements; the drawing speed is controlled at 100mm / s

[0060] Step 3: Austempering: the hot-rolled steel wire in step 2 is subjected to austempering, kept at 200°C for 10 hours, and then taken out and air-cooled to room te...

Embodiment 2

[0064] A galvanized steel wire for high-strength bridge cables, the chemical composition of the steel wire is: C 0.80%, Si 1.55%, Mn 1.8%, Cr 1.20%, Al 1.45%, Mo 0.21%, Co 1.10%, Nb 0.04%, the balance is Fe and impurity elements.

[0065] A method for preparing galvanized steel wire for high-strength bridge cables, the specific steps of the method are as follows:

[0066] Step 1: Hot rolling: heat the continuous casting slab to 1250°C and keep it warm for 4 hours to ensure that the composition of the slab is completely homogenized, and then hot rolling at 1100°C for 5 to 8 times. hot-rolled bars;

[0067] Step 2: Hot drawing: the hot-rolled bar is hot-drawn at a high temperature of 900°C to obtain bridge cable wires of different sizes; the drawing speed is controlled at 105mm / s

[0068] Step 3: Austempering: Austempering the hot-rolled steel wire in Step 2, keeping it at 300°C for 3 hours, then taking it out and air cooling to room temperature;

[0069] Step 4: Surface tre...

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Abstract

The invention belongs to the technical field of bridge cable steel wires and particularly relates to a high-strength and high-toughness bridge cable zinc-coated steel wire and a preparation method thereof. Chemical components of the steel wire comprise, by mass percent, 0.70-0.85% of C, 1.10-1.55% of Si, 1.45-2.00% of Mn, 0.45-1.50% of Cr, 0.90-1.75% of Al, and the balance Fe and impurity elements. The preparation method of the zinc-coated steel wire comprises the main steps of hot rolling, hot drawing, isothermal quenching, surface treatment and hot zinc coating. According to the steel wire and the preparation method, the problems that bridge cable zinc-coated steel wires in the prior art are low in strength, poor in torsional property and complex in technology, and consume energy and time are solved. Compared with pearlite (sorbite) steel wires, ultrathin bainite steel wires can improve the strength substantially on the premise of ensuring ductility and toughness, and the requirementfor high strength and high toughness of bridge cables can be met better.

Description

Technical field: [0001] The invention belongs to the technical field of bridge cable steel wires, in particular to a high-strength and toughness bridge cable galvanized steel wire and a preparation method thereof. Background technique: [0002] Galvanized steel wire for bridge cables generally refers to high-carbon sorbite wire rod as raw material, which is prepared by surface treatment, cold drawing, hot-dip galvanizing, stabilization and other processes. According to different use environments, it can be divided into cable-stayed steel wires and main-cable steel wires for suspension cables. The span of the suspension bridge is farther, the load-bearing capacity of the suspension cables is larger than that of the cable-stayed cables, and the requirements for material strength are also higher. Therefore, in mechanical Design the diameter of the suspension wire Generally smaller than the stay cable wire [0003] The strength of hot-dip galvanized steel wire is mainly det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/34C22C38/38C22C38/22C22C38/30C22C38/26C22C38/24C22C38/28C21D8/06C23C2/06C23C2/38
CPCC21D8/065C21D2211/002C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/30C22C38/34C22C38/38C23C2/06C23C2/38
Inventor 郭辉陈彦伟李强马军柴孟江郭震董海荣翟彦春
Owner WEIFANG UNIV OF SCI & TECH
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