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A high-performance extra-thick steel plate for wind power and its production method

A technology of extra-thick steel plate and production method, applied in the field of metal materials, can solve the problems of complex production process and low production efficiency, and achieve the effects of good low temperature performance and good Z-direction shrinkage rate

Active Publication Date: 2020-02-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The production process is complex and the production efficiency is low;

Method used

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  • A high-performance extra-thick steel plate for wind power and its production method
  • A high-performance extra-thick steel plate for wind power and its production method

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Embodiment Construction

[0035] Below by embodiment the present invention will be further described.

[0036] In the embodiment of the present invention, according to the component ratio of the technical solution, smelting-steel billet casting-heating-rolling-stacking and slow cooling-heat treatment are carried out.

[0037] Refining: LF furnace for refining treatment, VD degassing, LF furnace adding aluminum 1-2.5 kg / ton, VD vacuum degree 40-70Pa, keep for 15-40min;

[0038] Billet casting: the casting temperature is 1560-1580°C, and rare earth wire is fed during the casting process;

[0039] Rolling: The heating temperature is controlled at 1180-1220°C, under high temperature and high pressure, the rolling start temperature is 1150-1200°C, and the reduction rate of the first 3 passes is greater than or equal to 15%;

[0040] Heat treatment: After rolling, the steel plate is subjected to normalizing treatment, the heating temperature is 860-900°C, and the holding time is 1.5-2.0min / mm.

[0041] The...

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Abstract

The invention provides a wind power high-performance ultrathick steel plate and a production method thereof. The steel plate comprises the following components in percentage by weight: 0.10-0.18% of C, 0.10-0.35% of Si, 1.2-1.6% of Mn, P not more than 0.020%, S not more than 0.005%, 0.015-0.040% of Als, 0.01-0.05% of RE, and the balance of Fe and inevitable impurities. The thickness of the steel plate is 100-150 mm. The production method comprises the steps of smelting-refining-casting of steel blanks-heating-rolling-stacking and slow cooling-heat treatment. The production method can be adopted to produce the ultrathick steel plate with the thickness of 100-150 mm; the first-level flow detection is qualified; the steel plate is excellent in low-temperature performance; the impact power AKvof -50 DEG C is not lower than 150 J; and the Z-directional section shrinkage rate is excellent, and is not lower than 35%.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-performance extra-thick steel plate for wind power and a production method thereof. Background technique [0002] To the favor of countries all over the world. Many countries around the world have begun to get involved in wind power and have formulated a series of policies to promote the development of the wind power industry. Europe is the most mature market for wind power development in the world. At the end of 2007, the cumulative installed capacity of wind power in the world was 94,122 MW, of which the total installed capacity of wind power in Europe was 57,135 MW, accounting for 60% of the global market. Among them, Denmark's wind power generation accounts for more than 20% of the country's total power generation, and has become an important energy source. The wind power generation in Germany, Spain and other countries also occupies an important position ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02C21D1/28
CPCC21D1/28C21D8/0226C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06
Inventor 李文斌金耀辉李广龙陈华杨军赵坦王刚刘祥刘明冯丹竹
Owner ANGANG STEEL CO LTD