Corrosion-resistant steel bar for marine building structure and manufacturing method thereof

Abstract

The invention relates to a corrosion resistant-proof reinforcing steel bar for marine building structure and a manufacturing method thereof. The chemical components of the corrosion resistant-proof reinforcing steel bar is: 0.12% to 0.22% of C, 0.25 to 0.70% of Si, 0.50% to 0.80% of Mn, less than or equal to 0.012% of P, less than or equal to 0.012% of S, 0.65% to 1.20% of Cr, 0.06% to 0. 12% of V, 0.013% to 0.017% of N, and the balance of Fe and unavoidable impurities. According to the corrosion resistant-proof reinforcing steel bar for marine building structure and the manufacturing method thereof, the reinforcing steel bar structure is refined and the hardenability of the reinforcing steel bar is improved by adding alloying elements. By adopting the means of electromagnetic stirring and soft pressing in a smelting process, the segregation, loosening and shrinkage cavity of casting blank are effectively reduced, combined with the control of the rolling and cooling process, ultimately the reinforcing steel bar with good mechanical properties and corrosion resistance is produced, and the needs of building structural engineering in marine environment are met.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a corrosion-resistant steel bar for marine building structures and a manufacturing method thereof. Background technique [0002] With the rapid development of the economy, the speed of urban construction is also getting faster and faster. At the same time, reinforced concrete materials have also become a building structure material with a wide range of uses and a large amount. Reinforced concrete is a mixture of steel bars and concrete. It has the advantages of good durability, good fire resistance, and good integrity. It also has the tensile properties of steel bars and the compressive properties of concrete. As the skeleton of reinforced concrete, threaded steel bars are widely used in various engineering constructions. Although concrete has a protective effect on steel bars, in the process of practical application, especially when used in a corrosive environment, steel ba...

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Problems solved by technology

[0005] In recent years, my country has paid more and more attention to the problem of corrosion in response to problems such as reduced project life and reduced safety factor caused by corrosion of steel bars in construction projects in marine environments, and the country's safety requirements for marine construction projects have also increased significantly; Therefore, the research and development of a high-strength corrosion-resistant steel bar suitable for the marine construction environment is an important issue related to the construction of marine construction projects and national defense in my country for solving key problems such as the durability of steel bars and improving the overall corrosion resistance of marine environmental engineering. topic

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