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Steel for low temperature resistant wind power flange and rolling method thereof

A technology of wind power flange and low temperature resistance, which is applied in the field of steel rolling, which can solve the problems of enterprises without stable quality assurance capabilities and long-term stable operation disasters of wind turbines, and achieve the effect of ensuring long-term stable operation and excellent low temperature resistance toughness

Active Publication Date: 2021-12-21
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is that the flange has to be used reliably in the field for more than 20 years. It has to withstand various extreme weather and complex wind alternating loads, and has been subjected to tensile, bending, and shearing forces for a long time. If the product does not have superior low-temperature impact resistance Performance, it is hard to imagine that the enterprise does not have a stable quality assurance capability, which will bring unpredictable disasters to the long-term stable operation of wind turbines

Method used

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  • Steel for low temperature resistant wind power flange and rolling method thereof
  • Steel for low temperature resistant wind power flange and rolling method thereof
  • Steel for low temperature resistant wind power flange and rolling method thereof

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Embodiment Construction

[0011] The present invention aims to provide a low-temperature-resistant steel for wind power flanges and a rolling method thereof, so as to obtain steel for wind power flanges with excellent mechanical properties, especially excellent low-temperature impact toughness.

[0012] The chemical composition of the low temperature resistant wind power flange steel provided includes: C 0.15~0.20%, Si 0.15~0.35%, Mn 1.25~1.50%, P≤0.020%, S≤0.015%, Al≤0.020- 0.050%, Cr≤0.30%, Cu≤0.30%, Ni≤0.30%, [H]≤2.0ppm, [O]≤20ppm, [N]≤120ppm, Al / N≥2, CE≤0.43, the rest is Fe and unavoidable impurities; in a preferred embodiment, the chemical composition of the low temperature resistant wind power flange steel includes by mass percentage: C 0.17~0.19%, Si 0.20~0.30%, Mn 1.30~1.40%, P≤ 0.020%, S≤0.015%, Al 0.025-0.035%, Cr≤0.25%, Cu≤0.25%, Ni≤0.20%, [H]≤2.0ppm, [O]≤20ppm, [N]≤120ppm, Al / N≥2, CE≤0.43, and the rest are Fe and unavoidable impurities.

[0013] The production method of the provided low ...

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Abstract

The invention discloses a low-temperature-resistant wind power flange steel and a rolling method thereof. The chemical composition of the low-temperature-resistant wind power flange steel includes: C 0.15-0.20%, Si 0.15-0.35%, Mn 1.25~1.50%, P≤0.020%, S≤0.015%, Al≤0.020-0.050%, Cr≤0.30%, Cu≤0.30%, Ni≤0.30%, [H]≤2.0ppm, [O]≤20ppm, [N]≤120ppm, Al / N≥2, CE≤0.43, the rest is Fe and unavoidable impurities. The low-temperature-resistant wind power flange steel has excellent low-temperature impact toughness, and can effectively ensure the long-term stable operation of the wind power unit.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a low-temperature resistant wind power flange steel and a rolling method thereof. Background technique [0002] With the rapid growth of wind power generation, the market demand for wind power towers is also increasing, and the importance of the key connector of wind power towers - tower flanges is also getting more and more attention. [0003] The wind power tower flange is the key connection, support and force-bearing part of the wind power tower, and is an important part of wind power generation equipment, which has very strict requirements for production and manufacturing. The main reason is that the flange has to be used reliably in the field for more than 20 years. It has to withstand various extreme weather and complex wind alternating loads, and has been subjected to tensile, bending, and shearing forces for a long time. If the product does not have supe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C33/04B21B37/74
CPCC22C38/02C22C38/04C22C38/06C22C38/42C22C38/001C22C33/04B21B37/74
Inventor 孙睿哲周彦姜琛高海冬宋振东
Owner BAOTOU IRON & STEEL GRP