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Production technology of high strength galvanized steel wires

A galvanized steel wire and production process technology, which is applied in the field of metal product processing, can solve the problems of low strength and poor toughness of galvanized steel wire, and achieve the effects of low zinc consumption, high tensile strength, and dense and firm zinc layer

Inactive Publication Date: 2016-03-23
GUIZHOU WIRE ROPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a high-strength galvanized steel wire production process, and solve the technical problems of low strength and poor toughness of galvanized steel wire

Method used

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Examples

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Embodiment Construction

[0025] Take the production of Φ2.0mm, 2160MPa, AB grade galvanized rope steel wire as an example:

[0026] Process implementation steps of the present invention are as follows:

[0027] (1) Raw material selection

[0028] The high-quality carbon steel hot-rolled wire rod conforming to the GB / T4354 standard is selected, the steel number is 82B, and the diameter is ф8.0mm.

[0029] (2) Production of semi-finished steel wire

[0030] The diameter of the semi-finished product is set to 7.0mm, and the Φ8.0mm wire rod is pickled with sulfuric acid and phosphating coated to ensure that there is no quality defect on the surface of the drawn steel wire, and it is drawn into a Φ7.0mm semi-finished steel wire;

[0031] Φ7.0mm semi-finished steel wire heat treatment; heat treatment process parameters: heating temperature 900-940 ℃, lead quenching temperature 520-560 ℃, take-up speed 7-11m / min.

[0032] (3) Production of medium-plated steel wire

[0033] After heat treatment of Φ7.0mm ...

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Abstract

The invention relates to a production technology of high strength galvanized steel wires. The high strength galvanized steel wires of which the diameters are 2.0mm are made from wire rods of which the steel grade is 82B and the diameters are 8.0mm, a drawing after medium galvanizing technology is adopted for drawing, a three-segment type linear drawing die is adopted, the angle of a working cone is 6-80 degrees, and the length of the working cone is 2.5-3.5 times the diameter of a drawn wire; the length of a calibrating straight is 0.35-0.55 of the diameter of the wire; low-compressibility multi-time drawing is adopted during a drawing process, the compression ratio of the average drawing part is about 14%, the smooth drawing of the high strength galvanized steel wires can be realized, the problems that in the drawing process of super high strength galvanized steel wires, zinc is easy to scrape and filament breakage is easy to occur, are solved, the comprehensive performance indexes of torsion, curving and the like of the steel wires are favorable, and the purpose that the super high strength galvanized steel wires of which the diameters are 2.0mm and the pressure is 2000MPa can be well produced is realized.

Description

technical field [0001] The invention relates to a production process of high-strength galvanized steel wire, belonging to the technical field of metal product processing. Background technique [0002] The production of galvanized steel wire mainly adopts the process of first drawing and then plating or first plating and then drawing. The galvanized steel wire produced by first drawing and then plating has quality problems such as low strength, poor toughness, poor zinc layer quality and poor surface finish. The galvanized steel wire produced by post-drawing also has quality problems such as low strength, small zinc layer weight, and low pass rate. At present, the tensile strength of galvanized steel wire produced by domestic manufacturers is mainly 1670MPa and 1770MPa. The production volume of 1960MPa and above strength grade rope-making steel wire is small, the main reason is that the production process is immature, the zinc scraping is serious during the drawing process of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02B21C3/06
CPCB21C1/02B21C3/06
Inventor 黄忠渠王小刚严志远
Owner GUIZHOU WIRE ROPE
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