High strength anti-seismic reinforcing steel bar and production method thereof

A technology for anti-seismic steel bars and production methods, which is applied in the field of high-strength anti-seismic steel bars, and can solve problems such as unfavorable production and popularization of HRB500 high-strength steel bars, strict requirements on chemical composition and rolling temperature, and large consumption of vanadium or niobium alloys. To achieve the effects that are conducive to protection and rational utilization, promotion and application promotion, and strict control requirements
CN103255358AActive Publication Date: 2013-08-21WUKUN STEEL +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUKUN STEEL
Publication Date
2013-08-21
Patent Text Reader

Abstract

The present invention relates to a high strength anti-seismic reinforcing steel bar and a preparation method thereof. The high strength anti-seismic reinforcing steel bar comprises the following chemical components, by mass, 0.20-0.25 wt% of C, 0.40-0.65 wt% of Si, 1.30-1.50 wt% of Mn, 0.020-0.030 wt% of V, 0.010-0.020 wt% of N, 0.25-0.40 wt% of Cr, 0.010-0.020 wt% of Nb, less than or equal to 0.045 wt% of S, less than or equal to 0.045 wt% of P, and the balance of Fe and inevitable impurities. The preparation method comprises: conveying a steel billet into a soaking segment, wherein a furnace temperature is 1150-1200 DEG C; heating for 70-100 min so as to achieve a steel rolling starting temperature of 1020-1100 DEG C; carrying out rough rolling, medium rolling and finishing rolling, wherein a finishing rolling temperature is 950-1000; and carrying out rapid water cooling after finishing rolling so as to reduce a surface temperature to 400-500 DEG C, and then naturally cooling, wherein a temperature after a cooling bed treatment is 680-730 DEG C. The high strength anti-seismic reinforcing steel bar has characteristics of stable mechanical property, good extensibility, good weldability, low strain timeliness, and anti-seismic qualification rate of more than 99.2%.
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Description

technical field

[0001] The invention relates to a low-cost HRB500E chrome-vanadium-niobium microalloying high-strength anti-seismic steel bar and a production method thereof, which belong to the technical field of metal material processing and forming. Background technique

[0002] The Ministry of Housing and Urban-Rural Development and the Ministry of Industry and Information Technology, in order to implement the relevant work arrangements in the "Notice of the State Council on Printing and Distributing the "Twelfth Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction" (Guofa

[2011] No. 26), promote the iron and steel industry and In order to change the development mode of the construction industry, in accordance with the requirements of the "Outline of the Twelfth Five-Year Plan for National Economic and Social Development", the guidance on accelerating the application of high-strength steel bars was issued in January 2012, and the applicat...

Claims

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