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Ultrahigh-conductivity aluminum-clad steel stranded wire and production method thereof

An aluminum-clad steel, electrical conductivity technology, applied in conductive materials, conductive materials, used to reduce the size of conductors/cables, etc., can solve the problem of limited electrical conductivity, unbalanced performance, and difficulty in controlling bimetal synchronous stretching, etc. question

Active Publication Date: 2020-10-23
HENAN TONG CABLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the highest conductivity of the existing aluminum-clad steel strand product series is only 40% IACS, and the conductivity is limited. It is mainly known for its breaking force, and its performance is not balanced enough.
The invention patent with application publication number CN 102592714A discloses an aluminum-clad steel strand and its production method. It adopts a bimetallic synchronous stretching process, that is, the aluminum wire is continuously coated on the outside of the steel core, then the wire is drawn, and finally twisted. , but the control of bimetal synchronous stretching in the stretching process is a difficult point

Method used

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Embodiment 1

[0018] An aluminum-clad steel stranded wire with ultra-high conductivity, in which the steel wire cross-section accounts for 15.17%, and the draw-to-weight ratio is 11.1.

[0019] The ultra-high electrical conductivity aluminum-clad steel strand of the invention has an electrical conductivity of 53.96%IACS, a tensile strength of 385.5MPa, and a specific gravity of 3.473.

[0020] The production method of the above-mentioned ultra-high conductivity aluminum-clad steel strand comprises the following steps:

[0021] A: Select 82A steel wire as the steel wire blank, carry out wire laying, steel wire straightening, steel wire cleaning, steel wire heating, and the end is thinned by a pointing machine, and the steel wire enters the mold and is drawn under the action of the wire drawing machine and the mold wall; The strength of the steel wire after drawing is not less than 2150MPa, and the elongation is not less than 3%.

[0022] B: cladding, the aluminum rod is clad on the drawn st...

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Abstract

The invention belongs to the technical field of overhead transmission conductors in the power industry, and discloses an ultrahigh-conductivity aluminum-clad steel stranded wire. The steel wire section of the aluminum-clad steel stranded wire is 15.17%, and the tension-weight ratio is 11.1%. The invention also discloses a production method of the ultrahigh-conductivity aluminum-clad steel strandedwire. The preparation method comprises the following steps: selecting 82A steel wires as steel wire blanks, paying off the steel wires, straightening the steel wires, cleaning the steel wires, heating the steel wires, finely rolling the end parts through a pointing rolling machine, and drawing the steel wires in a die under the action of a wire drawing machine and a die wall; cladding: cladding the drawn steel wires with an aluminum rod by using a cladding machine to obtain aluminum-clad steel single wire blanks; carrying out one-die micro-deformation drawing on the aluminum-clad steel singlewire blanks to improve the surface smoothness; and stranding the aluminum-clad steel single wires in a cage stranding machine to obtain the aluminum-clad steel stranded wire. By limiting the steel wire material and the arrangement mode and changing the processing mode, the produced ultrahigh-conductivity aluminum-clad steel stranded wire can replace a high-strength aluminum alloy stranded wire.

Description

technical field [0001] The invention belongs to the technical field of overhead transmission wires in the electric power industry, and relates to an aluminum-clad steel strand with ultrahigh conductivity and a production method thereof. Background technique [0002] Power distribution and transmission is an essential link in the power system. At present, power distribution and transmission in the power system mainly rely on overhead transmission wires as the main carrier of power transmission. There are many varieties of overhead transmission wires, such as aluminum stranded wire, aluminum alloy stranded wire, steel cored aluminum stranded wire, aluminum clad steel stranded wire, etc. These wires must meet the two most basic functional requirements of carrying current and carrying tension. Conductors can meet different requirements of breaking force and ampacity. These two basic performance indicators basically show a nonlinear inverse relationship, that is, high strength an...

Claims

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Application Information

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IPC IPC(8): H01B5/10H01B1/02H01B13/00H01B13/02
CPCH01B5/10H01B1/02H01B1/023H01B13/0006H01B13/02
Inventor 王军棋马红菊张治中赵大贝王博柳明明谢育龙
Owner HENAN TONG CABLE
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