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Large-thickness structural steel plate for high-rise building and production method thereof

A high-rise building and structural steel plate technology, which is applied in the production field of the steel plate, can solve the problems that affect the production and use of the steel plate, low yield, high cost, etc., and achieve good lamellar tearing performance, high metallurgical level, and low production cost. Effect

Inactive Publication Date: 2013-02-06
WUYANG IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the current existing technology is concerned, structural steel plates with a thickness of more than 100 mm are rolled into large steel ingots, which have the disadvantages of low yield, high cost, and high price, which affects the production and use of this type of steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The large-thickness structural steel plate for high-rise buildings in this embodiment is smelted from the following components by weight percentage: C: 0.17%, Si: 0.33%, Mn: 1.40%, P: 0.008%, S: 0.002%, V: 0.035%, TAl (total aluminum): 0.050%, Nb: 0.020%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 120mm.

[0035] The steps of the production method of the large-thickness high-rise building structural steel plate of the present embodiment are as follows:

[0036] (1) Smelting: Take each component according to the above weight percentage to make molten steel. The molten steel is first smelted in an electric furnace. The weight of the molten steel is 110 tons. The time is 25min, the amount of lime is 15kg / t, when the temperature of molten steel reaches or exceeds 1565°C, it is transferred to a vacuum degassing furnace (VD furnace) for vacuum treatment. When the time is 15 minutes, break the vacuum and blow softly for 5...

Embodiment 2

[0046] The large-thickness structural steel plate for high-rise buildings in this embodiment is smelted from the following components by weight percentage: C: 0.16%, Si: 0.15%, Mn: 1.55%, P: 0.010%, S: 0.003%, V: 0.040%, TAl (total aluminum): 0.035%, Nb: 0.030%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 110 mm.

[0047] The steps of the production method of the large-thickness high-rise building structural steel plate of the present embodiment are as follows:

[0048] (1) Smelting: Take each component according to the above weight percentage to make molten steel. The molten steel is first smelted in an electric furnace. The weight of the molten steel is 115 tons. The time is 40min, the amount of lime is 15.8kg / t, when the temperature of molten steel reaches or exceeds 1570°C, it is transferred to a vacuum degassing furnace (VD furnace) for vacuum treatment, the CaSi block before vacuum treatment is 150kg / furnace, the vac...

Embodiment 3

[0058] The large-thickness structural steel plate for high-rise buildings in this embodiment is smelted from the following components by weight percentage: C: 0.19%, Si: 0.35%, Mn: 1.49%, P: 0.011%, S: 0.001%, V: 0.050%, TAl (total aluminum): 0.020%, Nb: 0.025%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 120mm.

[0059] The steps of the production method of the large-thickness high-rise building structural steel plate of the present embodiment are as follows:

[0060] (1) Smelting: Take each component according to the above weight percentage to make molten steel. The molten steel is first smelted in an electric furnace. The molten steel weighs 109 tons. The time is 38min, and the lime consumption is 16.2kg / t. When the temperature of molten steel reaches or exceeds 1550°C, it is transferred to a vacuum degassing furnace (VD furnace) for vacuum treatment. When the holding time is 15 minutes, break the vacuum, and blow soft...

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Abstract

The invention relates to a large-thickness structural steel plate for a high-rise building and further relates to a production method of the steel plate at the same time. The steel plate is formed by melting the following component percentages by weight: 0.16-0.19% of C, not more than 0.55% of Si, 1.40-1.55% of Mn, not more than 0.012% of P, not more than 0.003% of S, 0.020-0.050% of TAl (total aluminum), 0.020-0.30% of Nb, 0.035-0.050% of V, not more than 0.30% of Ni, not more than 0.30% of Cr, not more than 0.05% of Ti, and the balance of Fe and inevitable impurities. The production method comprises the steps as follows: smelting; refining; continuously casting; stacking; heating; rolling; stacking and slowly cooling; detecting defects; normalizing; and obtaining the finished steel plate. The shop sign of the steel plate is Q390GJC / Z35, the delivery state of the steel plate is normalization, continuous casting blanks with cross sections of 330 mm * 2400 mm are adopted to form the steel plate, the maximum thickness of the steel plate is 120 mm, and the requirements of the level II in the JB / T4730.3-2005 detection standard are met; and the steel plate has the characteristics of capability of being formed by the continuous casting blanks, larger thickness, higher strength and toughness, good lamellar tearing resistance and the like, and is suitable for manufacturing structural members for the high-rise building.

Description

technical field [0001] The invention relates to a structural steel plate for high-rise buildings with large thickness, and also relates to a production method of the steel plate. Background technique [0002] The maximum thickness of the steel plate stipulated in GB / T19879-2005 "Steel Plates for Building Structures" is 100mm, but the thickness of the steel plates for building structures required by the actual market has reached 120mm, and the internal quality must meet international standards (GB / T2970-2004 or JB / T4730-2005 ) Requirements of Class II flaw detection standards. As far as the current existing technology is concerned, structural steel plates with a thickness of more than 100 mm are rolled into large steel ingots, which have the disadvantages of low yield, high cost, and high price, which affects the production and use of this type of steel plate. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12C22C33/04C21D8/02
Inventor 韦明赵文忠李红文王亚琪刘丹胡丽周
Owner WUYANG IRON & STEEL
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