Atmospheric corrosion-resistant molten structural steel and chromium-vanadium-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, and achieve the effects of improving quality, raising the pass rate of slabs, and improving the quality of the center

CN107587045AActive Publication Date: 2018-01-16PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-01-16

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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, 0.021%-0.030% by weight of N, less than or equal to 0.030% of P, less than or equal to 0.020% of S and the balance of inescapable impurities and Fe. The invention provides atmospheric corrosion-resistant structural steel and a productionmethod thereof. Through continuous casting of molten steel, the central quality of a casting blank is improved, central cracks and central shrinkage cavity are avoided, the quality of the high strength and high atmospheric corrosion resistant structural steel blank is improved, a casting blank qualification rate is greatly improved and good atmospheric corrosion resistance and high strength of the atmospheric corrosion-resistant structural steel are obtained.
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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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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...