Ultrahigh strength steel wire dip-coated with Zn-Al-Mg-Si alloy coating, preparation method thereof and application thereof

A zn-al-mg-si, alloy coating technology, applied in the direction of hot-dip plating process, metal material coating process, coating, etc., can solve the problems of reduced corrosion resistance and high porosity, and achieve strong corrosion resistance , high torsion, and uniform porosity

Inactive Publication Date: 2016-02-17
BAOSTEEL GRP NANTONG WIRE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Zinc coating is currently commonly used for bridge steel wire. Although it has certain corrosion resistance, its corrosion resistance is reduced due to its high porosity.

Method used

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  • Ultrahigh strength steel wire dip-coated with Zn-Al-Mg-Si alloy coating, preparation method thereof and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Manufacture of the invention The process flow of 1860MPa ultra-high strength hot-dip Zn-Al-Mg-Si coated steel wire products is as follows: original wire rod performance inspection→surface treatment→wire drawing→hot-dip plating→stabilization treatment→inspection.

[0038] 1. Original wire rod performance test

[0039] Developed by Shanghai Baosteel B82MnQL special wire rod for bridge cables ensures that its composition and mechanical properties meet the requirements. The tensile strength is 1210±50MPa, and the section shrinkage is ≥30%. The wire rod must not have quenched structure, reticular cementite and structures harmful to performance, and the sorbite content should be greater than 90%. According to the requirements of GB / T224-1987, The total decarburization layer (full decarburization + transition layer) should not be greater than 0.07mm; the grain size detection is carried out according to the YB / T5148 standard, and the qualified range of the grain size detect...

Embodiment 2

[0064] According to the hot-dip Zn-Al-Mg-Si alloy coated steel wire produced by the process of the present invention, the controlled alloy composition is Zn92%, Al4.3%, Mg0.07%, Si3.63%. After testing, the tensile strength is ≥ 1860MPa, yield strength ≥ 1520MPa, relaxation rate ≤ 7.5%, torsion (L = 100d) ≥ 8. The steel wire exhibits excellent strength, low relaxation rate and high torsional performance, which meets the requirements of the development of suspension bridges for the mechanical properties of new bridge steel wires.

[0065] By reasonably controlling the element composition and drawing parameters of the wire rod, the development of the suspension bridge meets the needs of the super high strength and low relaxation of the bridge steel wire.

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Abstract

The invention relates to an ultrahigh strength coating steel wire dip-coated with a Zn-Al-Mg-Si alloy coating, a preparation method thereof and an application thereof. The alloy coating consists of the following components in percentage by mass: 30-97% of Zn, 5-80% of Al, 0.02-11% of Mg, and 0.05-5.0% of Si, based on 100% in total. The preparation method comprises the following steps: inspecting performances of an original coil rod; carrying out surface treatment; carrying out wire drawing; preparing a hot dipping Zn-Al-Mg-Si alloy coating; and carrying out stabilization treatment. The ultrahigh strength coating steel wire with the Zn-Al-Mg-Si alloy coating provided by the invention has corrosion resistance and mechanical performance superior to those of a current high-strength zinc-coated steel wire; the preparation method is easy to implement, meets needs of special environments such as a marine corrosion environment and the like on a bridge steel wire, and has a wide market prospect.

Description

technical field [0001] The invention belongs to the field of steel wire and its preparation, and in particular relates to an ultra-high-strength hot-dipped Zn-Al-Mg-Si alloy coated steel wire and its preparation method and application. Background technique [0002] With the rapid development of bridge construction technology, the design span of bridge construction is constantly increasing, and the "main cable" used as the main load-carrying component of the suspension bridge has also experienced a corresponding progress from the initial use of iron chains to the use of high-strength galvanized steel wires. . With the increase of the span of the suspension bridge, the strength of the galvanized steel wire used as the main cable is correspondingly higher, so as to control the self-weight of the main cable of the bridge and the construction cost of the super-large bridge. While maintaining excellent mechanical properties, in order to adapt to the corrosive marine climate, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/38C22C18/04C21D8/06
CPCC23C2/06C21D8/065C22C18/04C23C2/38
Inventor 王正茂肖轶钟庆东周代义孟昭贤张俊良赵启亮
Owner BAOSTEEL GRP NANTONG WIRE PROD
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