Production method of large section h-beam

A production method, the technology of H-shaped steel, applied in the direction of metal rolling, etc., can solve the problems of large market potential, high efficiency, and inability to produce in ordinary steel factories, so as to improve comprehensive performance, simple production process, reduce load and energy consumption Effect

Active Publication Date: 2016-06-01
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The products of these steel types have high efficiency and great market potential, which cannot be produced by ordinary steel mills.

Method used

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  • Production method of large section h-beam
  • Production method of large section h-beam
  • Production method of large section h-beam

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Experimental program
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Embodiment 1

[0038] The production method of this embodiment sequentially includes 150 t converter smelting, LF refining, continuous casting of shaped billets, surface cleaning of cast billets, rolling H-shaped steel and straightening.

[0039] The 150t converter is smelted using deoxidation alloying of silicomanganese and ferromanganese, with final deoxidation of aluminum. The mass percentage of C at the end point of 150t converter smelting is 0.06%, the mass percentage of P is 0.02%, and the mass percentage of S is 0.04%. The tapping temperature of controlled converter smelting is 1650°C.

[0040] White slag is used for LF refining, and ferrovanadium is added at the end of LF refining. The amount of slag and alloy added per 100 tons of LF refined molten steel includes: 401 kg of lime, 201 kg of bauxite, 80 kg of calcium carbide, 60 kg of anthracite, 451 kg of ferromanganese, 201 kg of ferrosilicon, and 130 kg of ferrovanadium. The in-situ temperature for LF refining is 1554°C, the off-...

Embodiment 2

[0048] The production method of this embodiment sequentially includes 150 t converter smelting, LF refining, continuous casting of shaped billets, surface cleaning of cast billets, rolling H-shaped steel and straightening.

[0049] The 150t converter is smelted using deoxidation alloying of silicomanganese and ferromanganese, with final deoxidation of aluminum. The mass percentage content of C at the converter end point of 150t converter smelting is 0.09%, the mass percentage content of P is 0.020%, and the mass percentage content of S is 0.04%. The tapping temperature of controlled converter smelting is 1650°C.

[0050] White slag is used for LF refining, and ferrovanadium is added at the end of LF refining. The amount of slag and alloy added per 100 tons of LF refined molten steel includes: 401 kg of lime, 203 kg of bauxite, 80 kg of calcium carbide, 20 kg of anthracite, 371 kg of ferromanganese, 201 kg of ferrosilicon, and 70 kg of ferrovanadium. The in-situ temperature f...

Embodiment 3

[0058] The production method of this embodiment sequentially includes 150 t converter smelting, LF refining, continuous casting of shaped billets, surface cleaning of cast billets, rolling H-shaped steel and straightening.

[0059] The 150t converter is smelted using deoxidation alloying of silicomanganese and ferromanganese, with final deoxidation of aluminum. The mass percent content of C at the converter end point of 150t converter smelting is 0.05%, the mass percent content of P is 0.01%, and the mass percent content of S is 0.03%. The tapping temperature of controlled converter smelting is 1650°C.

[0060] White slag is used for LF refining, and ferrovanadium is added at the end of LF refining. The amount of slag and alloy added per 100 tons of LF refined molten steel includes: 401 kg of lime, 201 kg of bauxite, 80 kg of calcium carbide, 55 kg of anthracite, 463 kg of ferromanganese, 201 kg of ferrosilicon, and 125 kg of ferrovanadium. The in-situ temperature for LF ref...

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Abstract

The invention discloses a large section H shaped steel, which comprises the following chemical components by mass: 0.16-0.20% of C, 0.25-0.40% of Si, 1.35-1.50% of Mn, less than or equal to 0.03% of P, less than or equal to 0.020% of S, less than or equal to 0.012% of N, 0.10-0.20% of V, greater than or equal to 0.015% and less than or equal to 0.030% of Al, and the balance Fe and impurities. The invention also discloses a production method for the large section H shaped steel. The method consists of: converter smelting, LF refining, beam blank continuous casting, casting blank surface cleaning, H shaped steel rolling and straightening. By means of reasonable component design, and under the circumstance of only adding the microalloy element V, comprehensive properties of the large section H shaped steel can be improved, and the production process is simple and is in favor of popularization.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for producing large-section H-shaped steel Background technique [0002] The current production capacity of H-shaped steel is basically balanced with domestic demand, and the development of large-section low-alloy high-strength structural H-shaped steel can meet the special requirements of users. The products of these steel types have high efficiency and great market potential, which cannot be produced by ordinary steel mills. These products reflect the technical strength of the enterprise, grasp the market of high-grade H-beams, and increase the market share. [0003] Hot-rolled H-shaped steel has the advantages of energy saving and high efficiency, economical and reasonable cross-section shape, uniform extension of each point on the cross-section and small internal stress during rolling, and is widely used in high-rise buildings, factory building construction, tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12C21C7/072B21B1/088
Inventor 冯岩青姜德刚
Owner INNER MONGOLIA BAOTOU STEEL UNION
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