Molten steel of atmospheric corrosion resistant steel and titanium-nitrogen containing atmospheric corrosion resistant steel and production method thereof

A technology that is resistant to atmospheric corrosion and production methods, applied in the manufacture of converters, etc., can solve problems such as the lack of steel strength indicators, and achieve the effects of improving quality, raising the pass rate of billets, and improving the quality of the center

CN106676421AActive Publication Date: 2017-05-17PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-05-17

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Abstract

The invention relates to the steel-making field, and specifically provides molten steel of atmospheric corrosion resistant steel. Based on total weight of the molten steel, the molten steel comprises the following components in percentage by weight: 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, 3.5%-5.0% of Cr, 0.13%-0.15% of V, 0.005%-0.030% of Ti, 0.015%-0.020% of N, not greater than 0.030% of P and not greater than 0.020% of S. The invention provides atmospheric corrosion resistant steel and a production method thereof. The molten steel can be continuously cast to improve central quality of casting blank, and central cracks and central pore shrinkage are avoided, so that quality of high-strength atmospheric corrosion resistant steel casting blank can be improved, and the qualification rate of casting blank can be greatly increased; and moreover, the finally obtained atmospheric corrosion resistant steel is good in atmospheric corrosion resistance, and has higher strength performance.
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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] 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, 3.5%-5.0% Cr, 0.13%-0.15% V, 0.005%-0.030% Ti, 0.015%-0.020% 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 pr...