Wind power flange steel and production process thereof

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...

AI Technical Summary

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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