Method for producing steel wire for steel core of ultrahigh-strength overhead cable by using 82B steel wire rod

An overhead cable and ultra-high-strength technology, which is applied in the field of producing ultra-high-strength overhead cable steel core steel wire with 82B wire rod, can solve the problems of unqualified torsional performance, steel wire toughness damage, environmental pollution, etc., to reduce heat treatment processes and reduce pollution Effect

Active Publication Date: 2013-04-03
武汉钢铁江北集团金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Generally speaking, there are three ways to increase the strength and stress of the drawn steel wire. One is to increase the total deformation of the steel wire, but too high a cold deformation will cause damage to the toughness of the steel wire, resulting in unqualified torsional performance; Raw materials with an initial strength exceeding 1250MPa; the third is to perform lead bath quenching on the 82B wire rod raw materials before drawing to increase the percentage of sorbite structure in the wire rod and achieve the purpose of improving the initial strength and toughness of the wire rod, but the Due to the increase of the lead bath quenching process in the production method, the cost of the process will increase by more than 800 yuan per ton of product, and it will also cause certain pollution to the environment

Method used

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  • Method for producing steel wire for steel core of ultrahigh-strength overhead cable by using 82B steel wire rod
  • Method for producing steel wire for steel core of ultrahigh-strength overhead cable by using 82B steel wire rod
  • Method for producing steel wire for steel core of ultrahigh-strength overhead cable by using 82B steel wire rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Production of galvanized steel strand for G4A 7 / 1.95 (1×7-5.85mm):

[0023] The composition and weight percentage of 82B used are C: 0.82%, Si: 0.22%, Mn: 0.75%, S<0.01%, P<0.01%, and the rest is Fe and unavoidable trace impurities; the diameter of the wire rod is D is 5.5mm, the initial tensile strength is 1160MPa, the reduction of area is 32%, the grain size is 8 grades, the sorbite content is 90%, the steel wire diameter d is 1.95mm, and the running speed v of steel wire galvanizing is 46.2m / min, the number of pressing passes n is 11 times.

[0024] Its production steps:

[0025] 1) Select 82B wire rod with a diameter of 5.5mm and an initial tensile strength of 1160MPa;

[0026] 2) Carry out conventional pickling and phosphating treatment, and the phosphating film layer on the surface of the wire rod after phosphating treatment is uniform;

[0027] 3) Drawing is carried out, the drawing pass n is 11 times, the average reduction rate of each pass is 17.2%...

Embodiment 2

[0033] Example 2: Production of galvanized steel strand for G4A 7 / 2.10 (1×7-6.30mm):

[0034] The composition and weight percentage of 82B used are C: 0.81%, Si: 0.24%, Mn: 0.78%, S<0.01%, P<0.01%, and the rest is Fe and unavoidable trace impurities; the diameter of the wire rod is D 6.5mm, the initial tensile strength is 1160MPa, the reduction of area is 32%, the grain size is 8 grades, the sorbite content is 90%, the steel wire diameter d is 2.10mm, and the running speed v of steel wire galvanizing is 45m / min, the number of pressing passes n is 11 times.

[0035] Its production steps:

[0036] 1) Select 82B wire rod with a diameter of 6.5mm and an initial tensile strength of 1160MPa;

[0037] 2) Carry out conventional pickling and phosphating treatment, and the phosphating film layer on the surface of the wire rod after phosphating treatment is uniform;

[0038] 3) Drawing is carried out, the drawing pass n is 11 times, the average reduction rate of each pass is 18.6%, t...

Embodiment 3

[0044] Example 3: Production of galvanized steel strand for G4A 19 / 2.50 (1×19-12.50mm):

[0045] The composition and weight percentage of 82B used are C: 0.81%, Si: 0.25%, Mn: 0.80%, S<0.01%, P<0.01%, and the rest is Fe and unavoidable trace impurities; the diameter of the wire rod is D 8.0mm, the initial tensile strength is 1160MPa, the reduction of area is 32%, the grain size is 8 grades, the sorbite content is 90%, the steel wire diameter d is 2.50mm, and the running speed v of steel wire galvanizing is 44m / min, the number of pressing passes n is 11 times.

[0046] Its production steps:

[0047] 1) Select 82B wire rod with a diameter of 8.0mm and an initial tensile strength of 1160MPa;

[0048] 2) Carry out conventional pickling and phosphating treatment, and the phosphating film layer on the surface of the wire rod after phosphating treatment is uniform;

[0049] 3) Drawing is carried out, the drawing pass n is 11 times, the average reduction rate of each pass is 19.1%...

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Abstract

The invention provides a method for producing a steel wire for a steel core of an ultrahigh-strength overhead cable by using an 82B steel wire rod. The method comprises the steps of selecting the steel wire rod with diameter less than or equal to 8 mm and initial anti-tension strength more than or equal to 1150 MPa; washing with acid and phosphating; drawing; and carrying out zinc plating for future use. According to the ultrahigh-strength zinc-plated steel wire with diameter of phi 1.60-2.60 mm, which is provided by adopting the ordinary 82B steel wire rod as a raw material, the steel wire rod has no need of being subjected to lead quenching treatment and is directly drawn, so that the pollution to environment can be reduced, thermal treatment processes of lead quenching and the like can be eliminated, and maintenance of the corresponding equipment can be reduced. Furthermore, under the condition of simple components, the anti-tension strength of the produced steel wire is at least 1900 MPa; the 1% extension stress is at least 1600 MPa; and the twist frequency is at least 20 times.

Description

technical field [0001] The invention relates to a production method of wire rods, in particular to a method of using 82B wire rods to produce steel wires for steel cores of ultra-high-strength overhead cables, which is suitable for producing ultra-high-strength overhead cables with a diameter of φ1.60-2.60mm Steel wire for the load-carrying steel core of the cable. Background technique [0002] The specific performance indicators of ultra-high-strength galvanized steel wire are: tensile strength ≥ 1770MPa, 1% elongation stress ≥ 1550MPa, elongation ≥ 2.5%, twisting times ≥ 14, and the quality of the zinc layer conforms to the A grade of GB / T3428-2002 . Ultra-high-strength grade galvanized steel wire can be used to make ultra-high-strength grade galvanized steel strands with structures of 1×7, 1×19 and 1×37. [0003] As the UHV and long-span power transmission technology with energy-saving and environmental protection features become increasingly mature and popularized, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21C1/00
Inventor 李建华吴东明张光新詹学明胡昕周祖江王惠琳张俊华陶维奇阮琴
Owner 武汉钢铁江北集团金属制品有限公司
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