Vanadium-containing titanium-containing atmospheric corrosion-resistant molten steel, atmospheric corrosion-resistant steel and production method thereof

Abstract

The invention relates to the steel-making field, and concretely provides an atmospheric corrosion resistant structural steel liquid, which contains the following components by adopting the total weight of the steel liquid as the baseline: 0.01 percent to 0.09 percent of C, 0.15 percent to 0.35 percent of Si, 0.30 percent to 0.60 percent of Mn, 0.30 percent to 0.40 percent of Cu, 0.20 percent to 0.30 percent of Ni, 2.0 percent to 3.5 percent of Cr, 0.06 percent to 0.12 percent of V, 0.005 percent to 0.030 percent of Ti, 0.008 percent to 0.014 percent of M, less than or equal to 0.030 percent of P, and less than or equal to 0.020 percent of S. The invention provides atmospheric corrosion resistant structural steel, and a production method thereof. By adopting the steel liquid provided by the invention for continuous casting, the central quality of a casting blank can be improved, and the occurrence of center burst and center line shrinkage is avoided, so that the quality of a high atmospheric corrosion resistant structural steel casting blank with high strength can be improved, and the yield of the casting blank can be greatly improved; and in addition, the finally obtained atmospheric corrosion resistant structural steel has good atmospheric corrosion resistance and a higher strength performance.

Description

technical field [0001] The invention relates to an atmospheric corrosion-resistant steel molten steel, an atmospheric corrosion-resistant steel obtained by continuous casting and rolling using the molten steel of the invention, a production method of the atmospheric corrosion-resistant steel and the atmospheric corrosion-resistant steel obtained by the method. Background technique [0002] Atmospheric corrosion-resistant steel is a very important class of steel. Its atmospheric corrosion resistance is 2-8 times that of ordinary steel, and its paintability is improved by 1.5-10 times. Due to the effectiveness of atmospheric corrosion resistance steel compared with ordinary steel, and its good economic efficiency compared with stainless steel, it has been developed rapidly in various countries in the world. Various steel structures used in the open air, railway vehicles and bridges are is the scope of its application. [0003] The early atmospheric corrosion-resistant steel v...

AI Technical Summary

Problems solved by technology

However, as a profile steel, the square continuous casting slab produced after increasing the chromium content has relatively obvious central defects (mainly central cracks and central shrinkage cavities), and the strength index of the final profile steel cannot reach that of plate steel Therefore, profile steels with better atmospheric corrosion resistance are still under development.

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