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Molten steel containing vanadium and niobium resistant atmospheric corrosion steel, atmospheric corrosion resistant steel and production method thereof

A technology of atmospheric corrosion resistance and section steel, which is applied in the field of atmospheric corrosion resistance section steel, can solve the problems such as the lack of strength index of section steel, and achieve the effects of improving quality, raising the pass rate of slabs, and improving the quality of the center

Active Publication Date: 2019-02-15
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Application Information

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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.

Method used

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  • Molten steel containing vanadium and niobium resistant atmospheric corrosion steel, atmospheric corrosion resistant steel and production method thereof
  • Molten steel containing vanadium and niobium resistant atmospheric corrosion steel, atmospheric corrosion resistant steel and production method thereof
  • Molten steel containing vanadium and niobium resistant atmospheric corrosion steel, atmospheric corrosion resistant steel and production method thereof

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

[0026] As mentioned above, the present invention provides a kind of atmospheric corrosion-resistant molten steel, based on the total weight of molten steel, molten steel contains: 0.01%-0.09% of C, 0.15%-0.35% of Si, 0.30%-0.60% of Mn, 0.30%-0.40% Cu, 0.20%-0.30% Ni, 2.0%-3.5% Cr, 0.13%-0.15% V, 0.005%-0.030% Ti, 0.01%-0.015% Nb, 0.015%-0.020% of N, not more than 0.030% of P and not more than 0.020% of S. The central quality of the slab (also called continuous casting slab) obtained by continuous casting of molten steel with the aforementioned composition is improved, and the center of the cross section of the continuous casting slab (after acid etching) basically has no central cracks and holes.

[0027] According to the...

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Abstract

The invention relates to the field of steelmaking and particularly provides molten steel of an atmosphere-corrosion-resistant structural steel. The total weight of the molten steel serves as the datum, and the molten steel comprises 0.01%-0.09% of C, 0.15%-0.35% of Si, 0.30%-0.60% of Mn, 0.30%-0.40% of Cu, 0.20%-0.30% of Ni, 2.0%-3.5% of Cr, 0.13%-0.15% of V, 0.005%-0.030% of Ti, 0.01%-0.015% of Nb, 0.015%-0.020% of N, not greater than 0.030% of P and not greater than 0.020% of S. The invention provides the atmosphere-corrosion-resistant structural steel and a production method thereof. By means of continuous casting of the molten steel, center quality of a casting blank can be improved, center cracks and center shrinkage cavities are avoided, therefore quality of the casting blank of the structural steel high in strength and atmosphere-corrosion resistance can be improved, and the qualification rate of the casting blank can be remarkably increased; and in addition, the atmosphere-corrosion-resistant structural steel which is finally obtained is good in atmosphere-corrosion resistance and higher in 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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C33/04
Inventor 刘明邓通武郭跃华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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