Ferrite stainless steel for buildings and preparation method thereof

Abstract

The invention discloses ferrite stainless steel for buildings. The ferrite stainless steel comprises the following chemical elements in percentage by mass: less than or equal to 0.015 percent of C, less than or equal to 0.020 percent of N, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.010 percentof S, more than 21.5 percent and less than 23.5 percent of Cr, more than 1.0 percent and less than 3.0 percent of Mo, more than or equal to 0.35 percent and less than or equal to 0.6 percent of Nb, less than or equal to 0.2 percent of Ti and the balance of Fe and other inevitable impurities, wherein (Nb+Ti) is more than or equal to 16(C+N) and less than or equal to 0.6 percent. Correspondingly, the invention further provides a method for preparing the stainless steel for buildings. Compared with the conventional stainless steel for buildings, the ferrite stainless steel has the advantages of excellent corrosion-resistant effect, low surface gloss, good scattered reflection effect, difficulty in deformation of steel plates, low cost and very good application effect.

Description

technical field [0001] The invention relates to stainless steel and a smelting method thereof in the field of metallurgy, in particular to a corrosion-resistant stainless steel and a manufacturing method thereof. Background technique [0002] With the development of coastal areas and the development of cities, stainless steel has begun to be used as building roofs and curtain wall decoration materials in some landmark buildings such as museums, exhibition halls and sports facilities. The roofs of these large buildings serving in the sea wind erosion environment not only have high requirements for decoration, but also have high requirements for the life of building materials. Stainless steel building materials are required to guarantee a 50-year life in harsh environments, and they do not need to be used for a long time. repair. At present, the steel used in building roof decoration materials is almost all carbon steel color-coated plates, or austenitic SUS304 and SUS316L st...

AI Technical Summary

Problems solved by technology

The coating of color-coated panels is prone to aging and fading during long-term service, while SUS304 or SUS316L steel is prone to deformation due to its large thermal expansion coefficient when used on the roof of large-span buildings near the sea, and is prone to deformation in a short period of time. Rust occurs

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