Low-cost high-performance corrosion-resistant steel bar and its manufacturing method

A manufacturing method and high-performance technology, applied in the field of low-cost high-performance corrosion-resistant steel bars and their manufacture, can solve the problems of high price, difficult welding, limited corrosion resistance improvement, etc., achieve good cost performance, facilitate large-scale promotion, and stabilize The effect of corrosion resistance

Active Publication Date: 2015-09-02
武汉钢铁有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, at present, all kinds of corrosion-resistant steel bars have their own shortcomings that are difficult to overcome. For example, although stainless steel bars have excellent corrosion resistance, their popularization and application are greatly limited due to their high price; The performance improvement is limited and welding is difficult; although the epoxy resin coated steel bar is relatively cheap, it has strict construction requirements. If the coating is damaged during the construction process, it will accelerate the corrosion of the steel bar

Method used

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  • Low-cost high-performance corrosion-resistant steel bar and its manufacturing method
  • Low-cost high-performance corrosion-resistant steel bar and its manufacturing method
  • Low-cost high-performance corrosion-resistant steel bar and its manufacturing method

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Embodiment Construction

[0033] The steel composition of the embodiment of the invention and the comparative example is shown in Table 2

[0034]

[0035] Comparison 1 is industrially produced ordinary HRB400 steel bar; Comparison 2 is industrially produced ordinary corrosion-resistant rebar.

[0036] The technological process of the present invention is: hot metal desulfurization pretreatment → electric furnace or top-bottom combined blowing converter smelting → out-of-furnace refining → continuous casting → casting billet heating → rolling → cooling bed air cooling → cut-to-length shear → storage, specifically;

[0037] A. Hot metal desulfurization pretreatment, using molten iron tank to stir desulfurization, control the sulfur content of molten iron into the electric furnace or converter [S]≤0.015%;

[0038] B. The molten iron in step A is sent to the electric furnace or the top-bottom combined blowing converter for conventional smelting with scrap steel and slagging materials. The end-point carbon content ...

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Abstract

The invention relates to a low-cost, high-performance corrosion-resistant steel bar and a preparation method thereof. The low-cost, high-performance corrosion-resistant steel bar comprises the following chemical components by weight percent: 0.06-0.10wt% of C, 3-8wt% of Cr, 0.5-1wt% of Cu, 0.5-1.5wt% of Mn, 0.01-0.02wt% of N, not more than 0.03wt% of P, not more than 0.035wt% of S, 0.2-0.5wt% of Si and the balance of Fe and inevitable impurities. The preparation method comprises the steps of desulphurization pretreatment of molten iron, smelting by an electric furnace or a top and bottom combined blown converter, refining out of the furnace, continuous casting, heating of a casting blank, rolling and air-cooling by a cold bed. The low-cost, high-performance corrosion-resistant steel bar provided by the invention has the advantages of excellent corrosion resistance, relatively low cost and good mechanical properties, fatigue performance and welding performance.

Description

Technical field [0001] The invention relates to a low-cost high-performance corrosion-resistant steel bar and a manufacturing method thereof. Background technique [0002] Rebars play a skeleton role in concrete structures and are widely used in modern buildings such as houses, bridges and highways. They are not only subjected to various forces during use, but also corroded by the surrounding environment. Data shows that corrosion is caused by the failure of rebars. The main reason for the cracking and peeling of the concrete structure seriously reduces the safety and service life of the building, causing great waste and hidden safety hazards. The premature failure of concrete structures caused by the corrosion of steel bars has become a major disaster faced by all countries in the world. [0003] In order to deal with the hidden safety hazards and economic losses caused by the corrosion of steel bars, metallurgical workers at home and abroad have carried out research on the corro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/20C22C33/04
Inventor 张帆范植金吴杰徐志徐志东周新龙丁礼权
Owner 武汉钢铁有限公司
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