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Method for producing HRBF400E fine-grain aseismic reinforcement

A technology of anti-seismic steel bars and production methods, applied in the field of steel products, to achieve the effects of reducing production costs, wide applicability, and saving resources

Inactive Publication Date: 2013-05-15
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no application for the production method of HRBF400E fine-grained seismic steel bars

Method used

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  • Method for producing HRBF400E fine-grain aseismic reinforcement
  • Method for producing HRBF400E fine-grain aseismic reinforcement
  • Method for producing HRBF400E fine-grain aseismic reinforcement

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Embodiment Construction

[0020] Shuigang Company produces HRBF400E fine-grain anti-seismic steel bars of Φ28, Φ12, Φ25, and Φ16 according to the method of the present invention, and the specific method is:

[0021] Molten iron and scrap steel are used as raw materials, and sent to the top-bottom combined blowing converter for smelting, and the carbon at the end point of smelting is controlled at 0.08% to 0.12%. The steel is refined by conventional methods, and argon is strictly implemented at the bottom of the furnace, so that the chemical composition in the steel meets the predetermined control range, that is, to produce Φ12 and Φ16mm fine-grained anti-seismic steel bars, the chemical composition in the smelted steel is calculated as mass fraction : C 0.20% ~ 0.25%, Si 0.55% ~ 0.75%, Mn 1.15% ~ 1.60%, P, S elements ≤ 0.45%, the rest is Fe and impurities that cannot be removed; produce Φ18 and Φ28mm fine-grained anti-seismic steel bars, The chemical composition in the smelted steel is calculated by ma...

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Abstract

The invention discloses a method for producing an HRBF400E fine-grain aseismic reinforcement. The method comprises the following steps of: (1) determining the control range of chemical components; (2) smelting: feeding liquid iron and scrap steel serving as raw materials into a top-bottom combined blowing converter for smelting; (3) refining: refining crude steel obtained in the last step by a conventional method so that the chemical components in the steel are in accordance with the predetermined control range; (4) continuous casting: carrying out full-protection casting; (5) rolling: heating the continuously cast steel billet in a heating furnace, controlling the temperature and performing rough rolling; performing finish rolling in a finishing mill group, thereby obtaining the reinforcement; next, cooling on a cooling bed, and finally, naturally cooling to the room temperature in air, thereby obtaining the HRBF400E fine-grain aseismic reinforcement. The production method provided by the invention is capable of greatly reducing the production cost and saving resources; the properties of the traditional steel and iron materials are upgraded; and the method is wide in application and suitable for the steel and iron enterprises for producing high-performance reinforcements.

Description

technical field [0001] The present invention relates to steel products, in particular to earthquake-resistant fine-grain steel products, especially to HRBF400E fine-grain anti-seismic steel bars. Background technique [0002] HRBF400E fine-grained anti-seismic steel bar is a building material product that optimizes traditional steel products. It is very different from HRB335 building material products. Discontinuous and partially tempered structures appear on the periphery of the base circle of the cold process sample, and on the cross-section sample, the Vickers hardness at 2mm from the edge of the sample is not greater than 40Hv from the center Vickers hardness. The production of traditional threaded steel bars mainly uses alloy strengthening to improve the performance of steel, such as: dispersion strengthening, phase transformation strengthening, solid solution strengthening and deformation strengthening, etc., while improving the strength of steel, it is accompanied by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21D8/08
Inventor 王丽鹃杨茂麟刘永林张应荣田立峰韦轶华徐宾陈海英
Owner SHOUGANG SHUICHENG IRON & STEEL GRP
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