Manufacturing method of atmosphere corrosion resistance steel

A technology of atmospheric corrosion-resistant steel and production methods, which is applied in the field of iron and steel smelting, can solve problems such as high cost and complex production process, and achieve the effects of improving production efficiency, shortening procedures, and reducing production costs
CN101660095BInactive Publication Date: 2011-03-16PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +3
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Publication Date
2011-03-16
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a manufacturing method of atmosphere corrosion resistance steel, comprising the following steps: smelting the molten steel; tapping the steel to a steel ladle when the content of C is less than 0.05%; adding lime, fluorite, predeoxidizing agent and alloy to the steel ladle; heating the steel ladle; adding aluminium pellets and various alloys to ensure that the molten steelcomprises the following components: 0.08-0.16% of C, 0.25-0.60% of Si, 0.80-1.60% of Mn, <=0.035% of P, <=0.015% of S, 0.20-0.60% of Cu, 0.15-0.55% of Ni, 0.20-0.80% of Cr and <=0.14% of V; controlling the temperature of the steel ladle to be in a range of 1548+ / -20 DEG C; then carrying out continuous casting to obtain rolled blanks. The performance of the atmosphere corrosion resistance steel inthe invention can reach over 450 MPa and 24 J, and the invention is also characterized by simple and convenient process and low cost, thus being applicable to rolling various structural steels which are used in atmosphere corrosion atmosphere.
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Description

technical field

[0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for smelting and producing atmospheric corrosion-resistant steel. Background technique

[0002] Chinese patent CN100427630C discloses a process of "converter smelting molten steel โ†’ molten steel refining โ†’ continuous steel casting โ†’ section steel rolling" to produce yield strength (Rel) not less than 450MPa, tensile strength (Rm) not less than 550MPa, High-strength atmospheric corrosion-resistant section steel for railway wagons with a low-temperature impact energy (AKv) of not less than 24J at -40ยฐC. The disclosed technology adopts five steps to produce high-strength atmospheric corrosion-resistant section steel, that is, the first step is molten steel smelting in converter, the second step is ladle pre-deoxidation and preliminary alloying, the third step is molten steel refining in LF furnace and RH furnace, and the third step The fourth step is castin...

Claims

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