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Chlorine ion corrosion resistant high-strength anti-seismic steel bar and production method and application thereof

A production method and steel bar technology applied in the field of metallurgy to achieve the effects of simple production process, high yield and wide applicability

Active Publication Date: 2019-06-14
YANGCHUN NEW STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects of existing corrosion-resistant high-strength steel bars, the primary purpose of the present invention is to provide a steel bar, which is characterized in that low-nickel, low-chromium, low-vanadium molten iron is smelted to obtain high-nickel-chromium steel bars, which improves corrosion resistance and mechanical properties

Method used

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  • Chlorine ion corrosion resistant high-strength anti-seismic steel bar and production method and application thereof
  • Chlorine ion corrosion resistant high-strength anti-seismic steel bar and production method and application thereof
  • Chlorine ion corrosion resistant high-strength anti-seismic steel bar and production method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A method for producing steel bars, comprising the steps of:

[0063] (1) Converter smelting: adding molten iron and steel scrap, according to the proportion of each element, Ni≤0.65%, Cr 0.25-7.00%, V0.028-0.029%, Ni / Cr 0.45-1.92, 0.16%≤C≤0.21% , Si≤0.80%, Mn≤1.4%, P≤0.03%, S≤0.03%, calculate and add alloys for smelting;

[0064] The alloy includes silicon-manganese alloy, silicon-iron alloy, vanadium-nitrogen alloy, high-carbon ferrochrome, nickel-iron, silicon-aluminum-barium and silicon-calcium-barium;

[0065] The temperature control parameters in the smelting process are shown in the table below:

[0066]

[0067] (2) LF furnace refining:

[0068] After the molten steel (about 120 tons per furnace) enters the station, 324kg of submerged arc slag and 40kg of fluorite are added first, and then lime is added. The lime is added in two batches to ensure that all the added lime can be completely melted. The steps of adding lime in batches are as follows: add 2 / 3 of...

Embodiment 2

[0087] A production method of a steel bar, the technological operation of which is the same as that of Example 1, the difference being the content of specific alloying elements. Specifically: 0.20% C, 0.50% Si, 1.30% Mn, 0.018% P, 0.011% S, 0.49% Cr, 0.32% Ni, 0.029% V, and the rest are Fe and unavoidable impurity elements.

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Abstract

The invention discloses a chlorine ion corrosion-resistant high-strength anti-seismic steel bar and a production method and application of the chlorine ion corrosion resistant high-strength anti-seismic steel bar. The steel bar contains the following elements of, by mass percentage, less than or equal to 0.65% of Ni, 0.25-7.00% of Cr, 0.028-0.029% of V and less than or equal to 1.4% of Mn, whereinNi / Cr is 0.45-1.92%. In the method, a converter is used for smelting according to a conventional smelting process, and corrosion-resistant alloy elements such as Cr, Ni and V are added into molten steel according to a conventional operation mode. The content of oxygen, sulfur and inclusions in steel is reduced by refining white slags in an LF furnace. A continuous casting crystallizer adopts an electromagnetic stirring technology, and production can be realized in most steel bar manufacturers in China. Compared with the prior art, a nickel-chromium-vanadium micro-alloying process adopted to produce the chloride ion corrosion-resistant high-strength anti-seismic steel bar has the advantages of accurately controlling the components of molten steel, being high in yield, easy to carry out andwide in applicability and the like.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a high-strength anti-seismic steel bar resistant to chloride ion corrosion, a production method and application thereof. Background technique [0002] At present, corrosion-resistant steel bars mainly include stainless steel steel bars, epoxy resin-coated steel bars, galvanized steel bars, stainless steel composite steel bars, and alloy corrosion-resistant steels. [0003] The domestic method of producing high-strength anti-seismic steel bars resistant to chloride ion corrosion is mainly to use laterite nickel ore, sea sand ore, and copper slag to produce high-nickel-chromium hot metal, and use high-nickel and high-chromium hot metal to produce corrosion-resistant steel bars at low cost. The alloying process is different. [0004] Using laterite nickel ore, sea sand ore, and copper slag to produce high-strength anti-seismic steel bars resistant to chloride ion corrosion is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/04C21C7/076C21D8/08
CPCY02P10/20
Inventor 聂志斌傅余东郝飞翔刘富贵许耀生严明周坚
Owner YANGCHUN NEW STEEL CO LTD