Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof

A technology of stainless steel and pulling slings, which is applied in the field of stainless steel and its preparation, can solve the problems of not being obtained, and achieve the effects of improving strength, reducing production costs, and reducing the amount of nickel

Active Publication Date: 2012-07-04
SHANXI TAIGANG STAINLESS STEEL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the service life and structural durability of cable-stayed bridges, a series of measures taken in the current project basically revolve around how to prevent steel wires and anchors from being corroded, but none of them have achieved good results, nor have they been thoroughly fundamentally solve the problem

Method used

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  • Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof
  • Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof
  • Stainless steel, stainless steel wire for bridge pull sling as well as preparation methods and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] A: Smelting billets

[0120] 1) Electric furnace smelting

[0121] Add 15.7 tons of scrap steel, 5.8 tons of high-carbon ferrochromium, 2.6 tons of high-carbon ferromanganese, and 0.5 tons of metal nickel into the electric furnace, add electrochemical cleaning, and after adding the above substances, the chemical composition of the crude molten steel in the electric furnace is roughly controlled at 1.30% carbon, P≤ 0.028%, S≤0.025%, Cr: 18.0%, Ni: 1.0%, Mn: 10.0% when the steel is tapped; every furnace must be cleaned up to prevent the fluctuation of Cr and Ni components. Remove the slag from time to time, and measure the thickness of the slag in the ladle to 50 mm.

[0122] 2) Argon oxygen refining furnace refining

[0123] The molten steel obtained above is transferred to the argon-oxygen refining furnace for refining, and the refining oxidation period is expressed as N 2 and O 2 Gas ratioO 2 :N 2 = 3:1, the total blown volume of the gas is 900m 3 / h, followed b...

Embodiment 2

[0140] A: Smelting billets

[0141] 1) Electric furnace smelting

[0142] Add 14.9 tons of scrap steel, 6.0 tons of high-carbon ferrochrome, 3.0 tons of high-carbon ferromanganese, and 0.6 tons of nickel metal to the electric furnace, and add electrochemical cleaning. After the above-mentioned substances are added, the chemical composition of the crude molten steel in the electric furnace is roughly controlled at 1.5% carbon, P≤ 0.028%, S≤0.025%, Cr 18.5%, Ni 1.2%, Mn 12.0% when tapping; every furnace must be cleaned up to prevent fluctuations in Cr and Ni components, and cleaned when tapping For slag, measure the thickness of slag in the ladle to 40mm.

[0143] 2) Argon oxygen refining furnace refining

[0144] The molten steel obtained above is transferred to the argon-oxygen refining furnace for refining, and the refining oxidation period is expressed as N 2 and O 2 Gas ratioO 2 :N 2 = 4:1, the total blown gas volume is 1000m 3 / h, followed by nitrogen blowing throug...

Embodiment 3

[0161] A: Smelting billets

[0162] Add 14.4 tons of scrap steel, 6.5 tons of high-carbon ferrochrome, 2.8 tons of high-carbon ferromanganese, and 0.6 tons of metal nickel to the electric furnace, and add electrochemical cleaning. After the above-mentioned substances are added, the chemical composition of the crude molten steel in the electric furnace is roughly controlled at 1.60% carbon, P≤ 0.028%, S≤0.025%, Cr19.0%, Ni1.1%, Mn11.0% when the steel is tapped; in each furnace, it must be cleaned up to prevent the fluctuation of Cr and Ni components. Remove the slag from time to time, and measure the thickness of the slag in the ladle to be 45 mm.

[0163] 2) Argon oxygen refining furnace refining

[0164] The molten steel obtained above is transferred to the argon-oxygen refining furnace for refining, and the refining oxidation period is expressed as N 2 and O 2 Gas ratioO 2 :N 2 =2:1, the total blown gas volume is 900m 3 / h, followed by nitrogen blowing throughout the r...

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Abstract

The invention relates to a stainless steel, a stainless steel wire for a bridge pull sling as well as preparation methods and application of the stainless steel and the stainless steel wire. The stainless steel comprises the components of less than or equal to 0.12% of C, less than or equal to 1.00% of Si, 14.0-19.0% of Mn, less than or equal to 0.06% of P, less than or equal to 0.01% of S, 18.0-22.0% of Cr, 1.0-2.0% of Ni, 0.45-0.65% of N, the balance of Fe and unavoidable impurities; and the method for producing the stainless steel comprises the steps of: the smelting process in an electric furnace: adding scrap steel and corresponding iron alloy or metal into the electric furnace, chemically cleaning, and controlling the chemical composition of crude molten steel in the electric furnace for tapping; the refining process of an argon oxygen decarburizing furnace: firstly, carrying out oxidation-period smelting and then reduction-period smelting, adding slag making material for making slag in the reduction period, and carrying out fine adjustment on the target composition by adding fine-adjustment composition alloy, and then tapping; the process of casting a billet; and the rolling process. The preparation method of the stainless steel wire for the bridge pull sling comprises the steps of: carrying out spinning, cooling, heat treatment, acid washing and cold drawing on the obtained stainless steel. The high-nitrogen stainless steel wire is adopted by the invention, so that the corrosion resistance is better when the strength is improved, and the service life of a bridge is prolonged after the bridge pull sling is made from the high-nitrogen stainless steel wire.

Description

technical field [0001] The invention relates to a stainless steel wire and a preparation method thereof, in particular to a stainless steel wire for a bridge pull sling and a preparation method thereof. Background technique [0002] The suspension cables of contemporary suspension bridges, cable-stayed bridges, and hanger arch bridges basically use high-strength carbon steel wires or steel strands. During operation, they are in a state of high stress for a long time and are sensitive to external damage. As the service life increases, gradually exposed The anti-corrosion layer is aging, rusted, broken wires and other diseases, and in severe cases, the pulling slings will break, causing bridge collapse accidents. The design service life of the slings of the sling bridges is generally more than 20 years. Due to poor protection measures and rapid corrosion of steel wires, the replacement time of the slings is generally 5 to 20 years, which is far less than the design service lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/04B21C1/00C21D8/06
Inventor 王辉绵李建民李承昌张江威陈敏郑晓华
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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