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High-strength wire rod for steel stranded wire and production method thereof

A production method and high-strength steel technology, applied in the direction of temperature control, etc., can solve the problem of high cost of SWRS82B wire rod

Active Publication Date: 2013-08-07
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of microalloying elements in this process, the cost of the produced SWRS82B wire rod is relatively high

Method used

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  • High-strength wire rod for steel stranded wire and production method thereof

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Embodiment 1-11

[0011] A wire rod for high-strength steel strands and a production method thereof, comprising the following steps:

[0012] (1) Ore blending: mix 6-9% iron ore rich in Cr, Ni and other elements, the elemental composition of the iron ore composition weight percentage is TFe: 54%-55%, Cr: 2.0%- 2.5%, Ni: 0.50%-0.60%;

[0013] (2) Blast furnace smelting: through the reduction reaction in the blast furnace, the element composition of the molten iron composition weight percentage reaches: Si: 0.30%-0.80%, Mn: 0.30%-0.80%, Cr: 0.20%-0.30%, Ni: 0.05 %-0.06%, P≤0.120%, S≤0.040%, and the rest is iron content.

[0014] The specific composition of molten iron for blast furnace smelting is shown in the table below:

[0015] Example

[0016] 8

[0017] (3) Converter smelting

[0018] The total charging capacity of the converter: 92 ± 0.5 tons, the ratio of molten iron is adjusted according to the heat situation. The working oxygen pressure of the oxygen lance is 0...

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Abstract

The invention discloses a high-strength wire rod for steel stranded wire and a production method thereof. The production method comprises the following steps of: adding 6-9 percent of iron ore enriched with elements of Cr, Ni, and the like during ore proportioning, wherein the iron ore comprises the components in percentage by weight: 54-55 percent of TFe, 2.0-2.5 percent of Cr, 0.50-0.60 percentof Ni; rolling a steel blank, wherein a start rolling temperature is 1000-1100 DEG C, a final rolling temperature is 950-1050 DEG C, a spinning temperature is 800-900 DEG C and an air-cooling finial cooling temperature is 550-650 DEG C; and then, slowly cooling. The invention has the advantages of low cost, stable wire rod texture performance, average sorbite interlamellar spacing of 0.16-0.18 micron, wire rod sorbite rate over 85 percent and wire rod product strength over 1150 MPa.

Description

technical field [0001] The invention belongs to the technical field of smelting, specifically relates to a wire rod for high-strength steel strands, and also provides a production method for the wire rods for high-strength steel strands. Background technique [0002] Large-scale high-strength prestressed steel wire and steel strand are mainly used in important construction projects such as high-rise buildings, long-span bridges, and deep-water projects. SWRS82B wire rod for high-strength steel strand is the raw material for making large-scale steel wire and steel strand. The main technical characteristics of SWRS82B wire rod are high strength and high cold-drawing performance. At present, the SWRS82B grade widely used in the market is proposed by the JIS G3506 high-carbon steel wire rod standard formulated by the Japanese Industrial Standards Survey Committee (JISC). The corresponding grade is only for carbon, silicon, manganese, phosphorus, and There are clear requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/40B21B37/74
Inventor 杨茂麟刘永林李正嵩魏福龙孙诚
Owner SHOUGANG SHUICHENG IRON & STEEL GRP
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