High carbon hard wire rod production method

A production method and high-carbon technology, applied in the field of high-quality SWRH82B (abbreviated as 82B) high-carbon hard wire wire rod, to achieve the effect of reducing broken wire rate, reducing carbon segregation index, and improving quality

Inactive Publication Date: 2013-10-02
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the report "Development and Quality Control of Beiying Prestressed Steel Strand SWRH82B" in the supplementary issue of "Continuous Casting" in September 2011, Benxi Iron and Steel's Beitai Steel Plant adopts billet continuous casting machine technology to produce 82B wire rod, but even Control the degree of superheat at around 23°C, and the highest carbon segregation of the slab still reaches 1.14

Method used

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Embodiment Construction

[0014] For industrial production of 50 heats of steel, the specific process parameters are controlled as follows:

[0015] 1) Converter production

[0016] The carbon content, phosphorus content and tapping temperature of the molten steel at the end of the converter are shown in Table 1.

[0017] Table 1 Composition and temperature of large-scale 82B steel converter tapping

[0018] Tapping temperature, ℃ Tapping carbon content, % Phosphorus content in tapping, % minimum value 1632 0.06 0.008 maximum value 1658 0.13 0.019 average value 1641 0.10 0.15

[0019] 2) LF furnace production

[0020] Table 2 Temperature control of LF furnace for large-scale 82B steel refining

[0021] Refining temperature in place, ℃ Refining off-site temperature, ℃ Refining processing time, min minimum value 1512 1561 32 maximum value 1579 1602 59 average value 1521 1563 41

[0022] [0022] 3) VD furnace pro...

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Abstract

The present invention relates to a high quality 82B high carbon hard wire rod production method, which is characterized in that a large square billet continuous casting billet with a cross section of 280 mm*380 mm is adopted, and a double steel rolling process is performed to produce. The process route comprises: smelting through a converter, ladle refining through a LF furnace, vacuum degassing through a VD furnace, large square billet continuous casting (280 mm*380 mm), track beam breakdown (152 mm*152 mm), and high speed wire rod rolling. The production method has the following advantages that: the large square billet continuous casting billet with the cross section of 280 mm*380 mm is adopted to roll, and process parameter control is combined so as to reduce a carbon segregation index of the casting billet, reduce a wire breaking rate of the wire rod, and improve steel material quality.

Description

technical field [0001] The invention relates to a production method of high-quality SWRH82B (abbreviated as 82B) high-carbon hard-wire wire rod, which belongs to the steelmaking field of metallurgical industry production. Background technique [0002] 82B wire rod is mainly used to produce steel wire and steel strand for high-strength and low-relaxation prestressed concrete structures, and is widely used in key projects such as high-rise buildings, long-span bridges, and water conservancy facilities. It is generally required that the wire produced by this steel type has a stable chemical composition, pure steel quality and excellent mechanical properties. However, if the quality of the product is not good, there will be breakage during the wire drawing process of the wire rod, which will affect the quality of the product, and also affect the production efficiency and yield of the metal product factory. [0003] According to the report of "Cause Analysis of SWRH82B Wire Rod ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C33/04C21D8/06
Inventor 李峰金文俊
Owner INNER MONGOLIA BAOTOU STEEL UNION
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