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High-strength steel bar with high corrosion resistance and preparation method thereof

A high-corrosion-resistant, high-strength steel technology, applied in the field of alloys, can solve the problem that the comprehensive performance of corrosion resistance and mechanical properties needs to be improved, and achieve the goal of improving oxidation resistance and corrosion resistance, high strength and good mechanical properties Effect

Active Publication Date: 2014-05-14
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the corrosion resistance of the above-mentioned steel bars has been improved compared with conventional threaded steel bars, the comprehensive performance of corrosion resistance and mechanical properties still needs to be improved.

Method used

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  • High-strength steel bar with high corrosion resistance and preparation method thereof
  • High-strength steel bar with high corrosion resistance and preparation method thereof
  • High-strength steel bar with high corrosion resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The reinforcing bar of the present embodiment, each component is as shown in table 1, and its preparation method is:

[0049] 1) Desulfurization: Remove blast furnace slag before desulfurization to improve desulfurization efficiency; take iron ore and melt it into molten iron, and the molten iron is desulfurized by KR method, that is, the molten iron is stirred with a stirring paddle at a speed of 90r / min, and after stirring for 2 minutes , add desulfurizer, stir for 10 minutes, and let stand for 5 minutes. Remove the desulfurization slag after the molten iron is desulfurized to stabilize the desulfurization effect, prevent the desulfurization slag from entering the converter and cause the converter to return to sulfur, and ensure that the sulfur content in the steel is controlled below 0.01%.

[0050] Wherein, the desulfurizer is lime powder and fluorite mixed in a mass ratio of 9:1.

[0051] 2) Decarburization, dephosphorization, and deoxidation: smelting in a conver...

Embodiment 2

[0056] The reinforcing bar of the present embodiment, each component is as shown in table 1, and its preparation method is:

[0057] 1) Desulfurization: Remove blast furnace slag before desulfurization to improve desulfurization efficiency; melt iron ore into molten iron, and desulfurize the molten iron using the KR method, that is, stir the molten iron with a stirring paddle at a speed of 110r / min, and stir for 3 minutes , add desulfurizer, stir for 15 minutes, and let stand for 10 minutes. Remove the desulfurization slag after the molten iron is desulfurized to stabilize the desulfurization effect, prevent the desulfurization slag from entering the converter and cause the converter to return to sulfur, and ensure that the sulfur content in the steel is controlled below 0.01%.

[0058] Wherein, the desulfurizer is lime powder and fluorite mixed in a mass ratio of 9:1.

[0059] 2) Decarburization, dephosphorization, and deoxidation: Converter smelting first, top-bottom double...

Embodiment 3

[0064] The steel bar of this embodiment, each component is as shown in the table above, and its preparation method is:

[0065] 1) Desulfurization: Remove blast furnace slag before desulfurization to improve desulfurization efficiency; melt iron ore into molten iron, and desulfurize the molten iron using the KR method, that is, stir the molten iron with a stirring paddle at a speed of 100r / min, and after stirring for 1min , add desulfurizer, stir for 13 minutes, and let stand for 10 minutes. Remove the desulfurization slag after the molten iron is desulfurized to stabilize the desulfurization effect, prevent the desulfurization slag from entering the converter and cause the converter to return to sulfur, and ensure that the sulfur content in the steel is controlled below 0.01%.

[0066] Wherein, the desulfurizer is lime powder and fluorite mixed in a mass ratio of 9:1.

[0067] 2) Decarburization, dephosphorization, and deoxidation: smelting in a converter first, followed by ...

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Abstract

The invention discloses a high-strength steel bar with high corrosion resistance. The high-strength steel bar comprises the components of C, Si, Mn, P, S, Cr, Ni, Al, Cu, Mo, Ti and Fe. The invention further provides a preparation method of the high-strength steel bar with high corrosion resistance. The steel bar is stable in performance, has excellent corrosion resistance and high mechanical property, and can be widely applied to building engineering of coast and salt lake areas.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular relates to a high-strength steel bar with high corrosion resistance and a preparation method thereof. Background technique [0002] Generally, after 10-15 years of service in coastal and offshore areas, reinforced concrete structures generally suffer from severe corrosion damage, while in the salt lake area, they will show very serious corrosion damage after only 2-3 years of service. Among them, as the main structural material, the corrosion of steel bars is an important factor for the corrosion of reinforced concrete structures. The corrosion of steel bars not only greatly shortens the overall life of the building, but also poses a safety hazard. Therefore, the corrosion resistance of steel bars has become a hot issue in engineering circles at home and abroad. [0003] The corrosion-resistant steel bars currently used mainly include coated steel bars, stainless steel bars and alloy cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C22C38/44C22C38/42C22C38/40C22C33/04C21D8/08
Inventor 张建春黄文克李阳麻晗
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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