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Atmospheric corrosion-resistant molten structural steel, niobium-nitrogen-containing atmospheric corrosion-resistant structural 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, achieve the effect of improving quality, increasing the qualified rate of billet, and avoiding the effect of central shrinkage cavity

Active Publication Date: 2018-01-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • 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.

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  • Atmospheric corrosion-resistant molten structural steel, niobium-nitrogen-containing atmospheric corrosion-resistant structural steel and production method thereof
  • Atmospheric corrosion-resistant molten structural steel, niobium-nitrogen-containing atmospheric corrosion-resistant structural steel and production method thereof
  • Atmospheric corrosion-resistant molten structural steel, niobium-nitrogen-containing atmospheric corrosion-resistant structural 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, and are not intended to limit the present invention.

[0026] Neither the endpoints nor any values ​​of the ranges disclosed herein are limited to such precise ranges or values, and these ranges or values ​​are understood to include values ​​approaching these ranges or values. For numerical ranges, between the endpoints of each range, between the endpoints of each range and individual point values, and between individual point values ​​can be combined with each other to obtain one or more new numerical ranges, these values Ranges should be considered as specifically disclosed herein.

[0027] 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 is comp...

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Abstract

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 3.5%-5.0% by weight of Cr, 0.16%-0.20% by weight of V, 0.01%-0.015% by weight of Nb, 0.021%-0.030% by weight of N, less than or equal to 0.030% by weight of P, less than or equal to 0.020% by weight of S and the balance of unavoidable impurities and Fe. The invention provides atmospheric corrosion-resistant structural steel and a production method thereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant structural steel has good atmospheric corrosion resistance and high strength properties.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/16C22C38/08C22C38/18C22C38/12C22C33/04C21D8/00
Inventor 刘明邓通武郭跃华何为
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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