400MPa-level vanadium-containing anti-seismic anti-corrosion rebar and production method thereof

Abstract

The invention discloses a 400MPa-level vanadium-containing anti-seismic anti-corrosion rebar and a production method thereof. The rebar is prepared from, by weight, 0.10-0.21% of C, 0.30-0.80% of Si, 1.0-1.60% of Mn, 0.6-1.0% of Cr, 0.05-0.40% of Cu, 0.020-0.10% of V, and the balance Fe and unavoidable impurities, the amount of P is smaller than or equal to 0.030%, and the amount of S is smaller than or equal to 0.030%. The production method includes converter or electric furnace smelting, steel ladle microalloying, external refining, continuous casting, casting blank heating, rolling and cooling bed air cooling. The corrosion resistance of the rebar is improved by controlling the content of Cr and Cu in steel, technological parameters are controlled strictly, the V(C,N) precipitation strengthening effect is promoted under the condition of ensuring steel-plastic tenacity, and the 400MPa-level vanadium-containing anti-seismic anti-corrosion rebar excellent in performance is obtained.

Description

technical field [0001] The invention relates to a 400MPa grade vanadium-containing anti-seismic and corrosion-resistant steel bar and a production method thereof, belonging to the technical fields of metallurgy and building materials. Background technique [0002] With the development of urbanization in coastal areas and the development and utilization of marine resources, the construction of reinforced concrete structures in coastal areas and oceans has become inevitable and has a tendency to expand. However, the corrosion of steel bars for reinforced concrete structures currently used is relatively serious. The service life of steel bars is short, the longest is only 10-20 years, which has caused great safety hazards to buildings. Therefore, the corrosion performance of steel bars has become a hot issue in engineering circles at home and abroad. The development of steel bars with good corrosion properties has been It has become the main subject of research in industrialize...

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Problems solved by technology

However, there are certain shortcomings, such as high production cost of stainless steel bars, high price and difficulty in popularization and application; limited corrosion resistance of galvanized steel bars and difficulty in welding; strict requirements for the use of coated steel bars and easy damage to the surface coating of steel bars, which accelerates the corrosion of steel bars, etc. question

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