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Alkali corrosion resistance high strength steel and production method thereof

A high-strength steel and production method technology, applied in the field of steel materials, can solve the problems that steel is not resistant to alkaline environment corrosion, cannot meet the use strength, etc., to achieve improved corrosion resistance, reduced production costs, and excellent corrosion resistance Effect

Active Publication Date: 2015-09-30
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides a high-strength steel resistant to alkaline corrosion and its production method, which solves the technical problem that the steel in the prior art is not resistant to corrosion in an alkaline environment, and its yield strength is 400 MPa, which cannot meet the requirements of service strength

Method used

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  • Alkali corrosion resistance high strength steel and production method thereof
  • Alkali corrosion resistance high strength steel and production method thereof
  • Alkali corrosion resistance high strength steel and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0079] For the production of steel bars with a specification of Φ12mm, the selected chemical composition is: 0.15%C, 1.27%Mn, 0.73%Si, 0.015%P, 0.011%S, 0.27%Cu, 0.17%Ni, 1.15%Cr, 0.096%V , 0.010% N, 0.0015% B, 0.019% Ti, and the balance is Fe. Continuous rolling process parameters: soaking section temperature: 1050°C, heating time 100min, start rolling temperature: 920°C, final rolling temperature 820°C, free air cooling after going to the cooling bed.

Embodiment 2

[0081] To produce steel bars with a specification of Φ22mm, the selected chemical composition is: 0.18%C, 1.13%Mn, 0.57%Si, 0.008%P, 0.009%S, 0.29%Cu, 0.21%Ni, 1.15%Cr, 0.10%V , 0.0108% N, 0.0021% B, 0.023% Ti, and the balance is Fe. Continuous rolling process parameters: soaking section temperature: 1100°C, heating time 100min, no overheating or overburning, starting rolling temperature: 950°C, final rolling temperature 800°C, free air cooling after going to the cooling bed.

Embodiment 3

[0083] For the production of steel bars with a specification of Φ40mm, the selected chemical components are: 0.20%C, 1.35%Mn, 0.72%Si, 0.007%P, 0.010%S, 0.30%Cu, 0.24%Ni, 1.25%Cr, 0.12%V , 0.0120% N, 0.0027% B, 0.026% Ti, and the balance is Fe. Continuous rolling process parameters: soaking section temperature: 1150°C, heating time 120min, no overheating or overburning, starting rolling temperature: 1000°C, final rolling temperature 750°C, free air cooling after going to the cooling bed.

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Abstract

The present invention discloses an alkali corrosion resistance high strength steel and a production method thereof, wherein the steel comprises, by mass, 0.15-0.20% of C, 0.45-0.75% of Si, 0.75-1.35% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 0.2-0.3% of Cu, 0.1-0.25% of Ni, 0.01-0.03% of Ti, 0.8-1.3% of Cr, 0.001-0.003% of B, 0.08-0.12% of V, 0.008-0.0120% of N, and the balance of Fe and unavoidable impurities. Compared with the existing ordinary building steel, the steel of the present invention has the following characteristic that the corrosion resistance in the alkaline environment is significantly improved, wherein laboratory test results show that the corrosion resistance is more than 2 times the corrosion resistance of the ordinary reinforcing steel bar. Compared with the epoxy resin coating reinforcing steel bar, the steel of the present invention has the excellent corrosion resistance, wherein the peeling phenomenon is easily generated on the epoxy resin coating reinforcing steel bar surface and the corrosion rate is high after the peeling. Compared with the stainless steel, the steel of the present invention has the substantially reduced production cost.

Description

technical field [0001] The invention relates to the technical field of steel materials, in particular to an alkaline corrosion-resistant high-strength steel and a production method thereof. Background technique [0002] Survey data at home and abroad show that steel bars used in civil engineering are severely corroded. The total corrosion loss of steel in the United States accounts for 4.2% of the gross national product (GDP) every year. The annual economic loss of corrosion damage to steel bars used in infrastructure reaches 150 billion US dollars. The Ministry of Transport of Japan inspected the conditions of 103 concrete seaport terminals and found that the terminals that have been used for more than 20 years have considerable rust cracks along the ribs. A survey of 62 coastal concrete structures in Australia found that the durability problems of coastal concrete structures are related to the severe corrosion of steel bars. The loss caused by corrosion of steel bars is...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D8/00C22C33/06
Inventor 徐志东徐志李媛吴杰范植金张帆王瑞敏周新龙丁礼权
Owner 武汉钢铁有限公司
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