Steel bar with high weather resistance, low cost and seawater corrosion resistance and production process

A production process and seawater-resistant technology, which is applied in low-cost seawater corrosion-resistant steel bars and production processes, and high weather resistance fields, can solve problems such as corrosion resistance, strength, and aging performance research, and achieve seawater corrosion resistance and low cost.

Active Publication Date: 2018-07-06
福建三宝钢铁有限公司
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Problems solved by technology

However, no research has been carried out on its corrosion resistance, strength, and aging properties, and the steel billets have not been stacked an...

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  • Steel bar with high weather resistance, low cost and seawater corrosion resistance and production process
  • Steel bar with high weather resistance, low cost and seawater corrosion resistance and production process
  • Steel bar with high weather resistance, low cost and seawater corrosion resistance and production process

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Embodiment Construction

[0025] The specific implementation of the present invention will be further described below by taking the corrosion-resistant steel bar with a specification of Ф22mm as an example:

[0026] Reasonable chemical composition plays an important role in the performance of steel bars. Steel bars can not only meet the requirements of strength and plasticity, but also meet the requirements of corrosion resistance. Studies have shown that Cr, Ni, and Cu have a good effect on improving the corrosion resistance of steel bars. Through repeated experimental comparisons, the present invention finds a scientific and reasonable balance point between alloy resources and improving the corrosion resistance of steel bars, and finally develops It has good corrosion resistance and can minimize the consumption of alloy resources. The invention provides a seawater corrosion-resistant steel bar with high weather resistance and low cost, which contains the following elements by weight: C: 0.04%-0.10%, ...

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Abstract

The invention provides a steel bar with high weather resistance, low cost and seawater corrosion resistance and a production process. The steel bar comprises the following elementary compositions of,by weight, 0.04%-0.10% of C, 0.10%-0.50% of Si, 0.5%-1.6% of Mn, 0.03% or less of P, 0.02% or less of S, 2%-4% of Cr, 0.3%-0.5% of Cu, 0.2%-0.6% of Ni, and the balance Fe and inevitable impurities. According to the steel bar, the mechanical property meets the requirement of the steel bar for corrosion resistance, the aging strain is low, and the corrosion rate is lower than 70% that of common steel bars. The technical path of the process comprises a 70-ton ultrahigh-power electric furnace, LF ladle refining, deoxidation and alloying after steel discharging, argon blowing, continuous casting of165 square billets at four streams by four machines, a heat accumulating type stepping heating furnace, 18 non-twist tandem mills, controlled-rolling and controlled-cold cooling, finishing, packagingand storage.

Description

technical field [0001] The invention belongs to the field of iron metallurgy, and in particular relates to a high-weather-resistant, low-cost seawater corrosion-resistant steel bar and a production process. Background technique [0002] As an important building material, steel bars are widely used in modern engineering construction. During use, steel bars are not only required to have a certain strength to withstand various forces, but also require them to have certain corrosion resistance. Especially in a corrosive environment with chloride salt as the medium, chloride ions will penetrate into the concrete, destroy the passivation film on the surface of the steel bar, cause corrosion of the steel bar, and cause concrete cracking and spalling, reducing the service life of the reinforced concrete structure. At present, some coastal areas in China Delay-penetration corrosion of steel matrix is ​​delayed by adding antirust solution to reinforced concrete structure, but the chem...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/58C21D8/08C22C33/04
CPCC21D8/08C22C33/04C22C38/02C22C38/04C22C38/42C22C38/58Y02P10/20
Inventor 林军吴长锡林致明
Owner 福建三宝钢铁有限公司
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