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Production process of extra-high strength steel stranded wire for long-span transmission wire

An ultra-high-strength technology for transmission wires, which is applied in the field of production technology of ultra-high-strength steel strands for large-span transmission wires, can solve the problems of restricting the production of wires and not being able to obtain them, and achieve technological progress and simple implementation methods. The effect of the improvement of product quality

Active Publication Date: 2012-09-26
巩义市恒星金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Extra-high-strength hot-dip galvanized steel strand is the key material for the production of long-span conductors. For a long time, it has not been effectively solved in China and can only be imported from abroad, which seriously restricts the production of such conductors.

Method used

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  • Production process of extra-high strength steel stranded wire for long-span transmission wire
  • Production process of extra-high strength steel stranded wire for long-span transmission wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: The production process of the ultra-high-strength steel strands for large-span transmission conductors of the present invention uses raw materials with a diameter of ￠9.0mm and steel grade 82B to produce 37 strands with a total diameter of 20.16mm and a single wire diameter of 2.88mm for large-span transmission conductors The hot-dip galvanized steel strand, the process is as follows:

[0042] 1) After the raw material is wire rod, the surface treatment of the wire rod is carried out first, and then the high-carbon wire rod of ￠9.0mm is selected to be drawn to ￠8.5mm. line machine;

[0043] 2) Heat treatment, pickling and phosphating again, and surface treatment of the wire;

[0044] 3) Finished product drawing: use high-power multi-pass LT-11 / 650 water tank wire drawing machine for drawing processing, the compression ratio is 12-18.6%, and the drawing process is as follows:

[0045] The first drawing: reach a diameter of 8.5mm and a compression rate of ...

Embodiment 2

[0060] Embodiment 2: The production process of the ultra-high-strength steel strands for large-span transmission wires in this embodiment is different from Embodiment 1 in that: in the process of surface treatment of wire rods, the following methods are used for pickling and phosphating: the acidification process uses concentration It is 15%-20% hydrochloric acid, pickling the wire at room temperature, the pickling time is 8-12min, the concentration of ferrous ions in hydrochloric acid is controlled at ≤200g / L; during the phosphating process, the temperature is controlled at 50 ~70°C, the phosphating time is 10~15min, and the thickness of the phosphating film is controlled to be ≤11 microns.

Embodiment 3

[0061] Embodiment 3: The production process of extra-high-strength steel strands for large-span transmission wires in this embodiment, the following measures are taken during the drawing process: by adopting the method of increasing the diameter of the tower pulley and reducing the drawing speed, to ensure a large compression ratio The lower toughness index is not lowered, the diameter of the tower wheel is increased to 678-878mm, and the drawing speed is controlled at 2.5 m / s to 3.5 m / s.

[0062] In the production process of the extra-high-strength steel strand for large-span power transmission wires in the present invention, during the twisting process, the wire wheel of the tubular strander is changed to a rotatable type to reduce the stress during the stranding process of the steel wire, and to ensure that the steel strand Good straightness, the diameter of the traction wheel of the tube stranding machine is between 1.5m and 1.8m.

[0063] During the hot-dip galvanizing pr...

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Abstract

The invention relates to a production process of steel stranded wires, and in particular relates to a production process of an extra-high strength steel stranded wire for a long-span transmission wire. A raw material with a diameter of theta9.0mm and a steel grade of 82B is utilized to produce a 37-strand hot galvanizing steel stranded wire with a total diameter of 20.16mm and a single-wire diameter of 2.88mm for the long-span transmission wire. The production process comprises the following steps of: (1) coiling the raw material, carrying out surface treatment, and drawing a high carbon steel wire rod of theta9.0mm to theta8.5mm; (2) carrying out heat treatment, acid-washing, phosphating, and surface treatment on a wire rod; (3) drawing a finished product: carrying out 13-pass drawing processing by using a high-power and multi-pass LT-11 / 650 type water tank wire-drawing machine, wherein a compression ratio is 12-18.6%; (4) inspecting, putting online, hot galvanizing, and winding by using a spool; and (5) inspecting, and twisting. The production process of the steel stranded wire is simple in realization mode, and all indexes of the produced extra-high strength hot galvanizing steel stranded wire meet the technical requirements of long-span projects.

Description

technical field [0001] The invention relates to a production process of steel strands, in particular to a production process of extra-high-strength steel strands for large-span power transmission wires. Background technique [0002] On the long-span line, in order to resist the long self-weight and the complex natural environment, the tensile strength of the conductor must be increased to achieve the best combination of tensile force and weight ratio. Only by increasing the tensile strength can both the tensile strength be improved. The dual purpose of reducing its own weight. The so-called big span, as the name suggests, is the need to cross a large span, often across a large river, mountain, etc., and its special features are its characteristics. For large-span lines, extra-high-strength steel strands must be used, and the tensile strength of galvanized steel wires before stranding is ≥1910MPa, and the tensile strength after stranding is greater than or equal to 1815MPa. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02B21C43/00
Inventor 谢进宝焦宗保蔡俊利谢瑞丽焦新发张保湖曲晓峰谢红伟焦荣涛
Owner 巩义市恒星金属制品有限公司
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