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Wind power flange steel and production process thereof

A technology for wind power flanges and production processes, which is applied in the direction of wind turbine components, wind engines, mechanical equipment, etc., and can solve the problems of shortening production process energy consumption, low cost and energy consumption, low yield of flanges, etc., to achieve a high yield The effect of improving and improving the yield and reducing the cost

Inactive Publication Date: 2010-02-10
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology

This method can solve the problem of low yield of flanges made of traditional steel ingots. It has the characteristics of low cost, low energy consumption and fast pace. With the appropriate chemical composition design, it can ensure high strength, high toughness and good welding. Performance and other requirements, improve the construction efficiency and safety and reliability of engineering structures, and simplify the production process, shorten the production process, reduce production energy consumption, suitable for large-scale production operations

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  • Wind power flange steel and production process thereof
  • Wind power flange steel and production process thereof

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Embodiment Construction

[0010] The composition of the steel for the wind power flange is as follows by weight percentage: C: 0.14-0.17%, Si: 0.25-0.40%, Mn: 1.35-1.50%, P≤0.015%, S≤0.003%, V≤0.015-0.030 %, Nb≤0.025~0.040%, Al0.030~0.045, N≤0.004, H≤0.0001, O≤0.002, As+Cu+Cu≤0.1, and the rest are controlled by Fe and unavoidable impurities.

[0011] The present invention adopts the method of continuous casting to produce steel for wind power flanges. The production process is as follows: pour molten steel on the crystallizer for continuous casting, the superheat of the tundish is 15±5°C, the casting speed: 0.475m / min, and the specific water volume: 0.80L / kg, electric stirrer: 900A, 5Hz, 30s-3-30s, continuous casting and pouring requires full protection casting, and the protective tube is put on within 1min after the ladle is poured; during the steel pouring process, the amount of argon blowing of the stopper rod is controlled, Stack cooling is required for ≥48 hours after the slab is off the assembly ...

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Abstract

The invention discloses wind power flange steel and a production process thereof. The wind power flange steel comprises the following components in percentage by weight: C: 0.14-0.17, Si: 0.25-0.40, Mn: 1.35-1.50, P: smaller than or equal to 0.015, S: smaller than or equal to 0.003, V: smaller than or equal to 0.015-0.030, Nb: smaller than or equal to 0.025-0.040, Al: 0.030-0.045, N: smaller thanor equal to 0.004, H: smaller than or equal to 0.0001, O: smaller than or equal to 0.002, and As-Cu-Cu mixture: smaller than or equal to 0.1. The invention adopts a continuous-casting method to produce and manufacture the wind power flange steel. The integral process flows comprise the following steps: optimizing molten steel; pretreating KR molten steel; carrying out argon-stirring treatment in atop and bottom blowing converter of 120 tons; refining in an LF furnace; carrying out VD vacuum degassing treatment; continuously casting; cooling in pile; testing; and entering a warehouse. Comparedwith the prior art, the invention improves the manufacture yield of the wind power flange steel. Compared with a traditional forging ingot mold flange, a wind power flange forged by a continuous-casting blank improves the yield by more than 25 percent and greatly decreases the cost.

Description

Technical field [0001] The invention belongs to the field of steel production for manufacturing wind power flanges, and relates to a steel for manufacturing wind power flanges and a production process thereof. Background technique [0002] In the second half of 2008, due to the impact of the world financial crisis, in order to ensure the stable development of the social economy, the Chinese government increased investment in fixed assets in the fields of transportation and energy, and supported and encouraged the development of renewable energy. As a clean and renewable energy, wind energy has attracted more and more attention from everyone. The wind power industry has also won historic opportunities for development. The number of companies quickly rose to more than 70, and the demand for steel for wind power generation also continued to rise. [0003] At present, the known steel for manufacturing wind power flanges is a steel ingot produced by a die-casting process, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/16C22C38/12B22D11/18F03D11/00
Inventor 朱新文许少普赵迪崔冠军徐春邱同榜王新刘庆波宋兵张少辉李红阳乔华伟
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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