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Low-manganese high-carbon steel wire rod for high-strength steel strand and preparation method thereof

A technology of high-strength steel and high-carbon steel, which is applied in the field of low-manganese and high-carbon steel wire rods for high-strength steel strands and its preparation, and achieves the effects of refining lamella spacing, improving microstructure and mechanical properties, and reducing the degree of central segregation.

Active Publication Date: 2019-09-17
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-manganese high-carbon steel wire rod for high-strength steel strand and its preparation method. The overall idea is to adopt low alloy content, increase heating and spinning temperature, and reduce the packing density of wire rod on the Stelmo line. , using large air volume and fast cooling to overcome the problem that ordinary SWRH82B cannot meet user requirements

Method used

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  • Low-manganese high-carbon steel wire rod for high-strength steel strand and preparation method thereof
  • Low-manganese high-carbon steel wire rod for high-strength steel strand and preparation method thereof
  • Low-manganese high-carbon steel wire rod for high-strength steel strand and preparation method thereof

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Embodiment 1-8

[0028] Embodiment 1-8 The preparation method of low-manganese high-carbon steel wire rod for high-strength steel strand is as follows,

[0029] The heating furnace is used to heat the 140cm*140cm*15.7m continuous casting billet through the heating furnace. The heating temperature of the heating furnace is controlled as follows: preheating section 970±20℃, heating section 1090±20℃, soaking section 1140±20℃, The air-fuel ratio is 0.65±0.05, the heating time is 75±5min, and the rolling start temperature is 1050±15°C;

[0030] 22 passes of continuous rolling, the finish rolling inlet temperature is 950±15℃, and the outlet temperature is ≤1000℃;

[0031] Spinning, the spinning temperature is 920±10°C;

[0032] Stelmore phase change cooling, passing through 12 roller tables with different speeds in sequence, the roller table speeds are 1.280, 1.390, 1.453, 1.527, 1.599, 1.632, 1.682, 1.499, 1.225, 1.046, 1.068, 1.020m / s, A total of 14 fans are turned on, and the air volume of the ...

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Abstract

The invention discloses a low manganese high carbon steel wire rod for a high strength steel strand wire and a preparation method. The chemical composition of the steel wire rod comprises, by weight,0.80-0.83% of C, 0.20-0.25% of Si, 0.40-0.48% of Mn, 0.18-0.22% of Cr, less than or equal to 0.020% of P, less than or equal to 0.020% of S, and the balance Fe. Compared with ordinary SWRH82B, the structure and mechanical properties of the steel wire rod are improved. In addition, the yield and property of a 1860MPa-level steel strand wire produced by users are also improved.

Description

technical field [0001] The application belongs to the technical field of steel rolling, and in particular relates to a low-manganese high-carbon steel wire rod for high-strength steel strands and a preparation method thereof. Background technique [0002] With the rapid advancement of construction projects such as highways, bridges, port terminals and stadiums, the prestressed steel strand industry has developed rapidly. As a key component for the implementation of large-scale construction projects, its quality requirements are high and it belongs to advanced technology. High-end products. [0003] At present, 1860MPa grade steel strand is the most widely used, mainly using 13mm SWRH82B series wire rod as raw material, the wire rod composition is generally C: 0.79%-0.86%, Si: 0.15%-0.35%, Mn: 0.60%-0.90% , P ≤ 0.030%, S ≤ 0.030%, according to the production process and the requirements of downstream customers, each steel mill appropriately adds 0.15%-0.35% Cr, 0.01%-0.10% V...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C21D8/06
Inventor 胡磊王雷麻晗胡显军施一新
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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