Structural steel plate for wind power and production method thereof

A technology of structural steel plate and production method, applied in the field of structural steel plate for wind power and its production, can solve the problems of high cost, poor comprehensive performance of steel plate, long production process, etc. Effect

Active Publication Date: 2021-12-31
INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a production method of a structural steel plate for wind power, and a structural steel plate for wind power prepared by the production method. On the basis of a low-carbon and low-alloy chemical composition system, three-stage controlled rolling is adopted. Manufacturing + air-cooling cooling technology cancels the existing off-line heat treatment and water-cooling process in controlled cooling, and solves the problems of high cost, long production process and poor comprehensive performance of the steel plate in the existing technology

Method used

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  • Structural steel plate for wind power and production method thereof
  • Structural steel plate for wind power and production method thereof
  • Structural steel plate for wind power and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0088] Provide a kind of steel plate, the chemical composition of steel plate comprises in mass percent: C:0.08%, Si:0.15%, Mn:1.48%, P:0.012%, S:0.004%, Cr:0.12%, Ni:0.12%, Nb: 0.014%, Ti: 0.014%, Alt: 0.035%, N: 0.0042%, the rest is iron and unavoidable impurities, carbon equivalent CEV: 0.359%.

[0089] The production method of the steel plate includes the following three steps.

[0090] (1) Heating process

[0091] The chemical composition of the continuous casting slab used includes: C: 0.08%, Si: 0.15%, Mn: 1.48%, P: 0.012%, S: 0.004%, Cr: 0.12%, Ni: 0.12%, Nb : 0.014%, Ti: 0.014%, Alt: 0.035%, N: 0.0042%, the rest is iron and unavoidable impurities, carbon equivalent CEV: 0.359%.

[0092] T is calculated by formula ① as above NbC is 1171°C, using the formula ② above to calculate T NbN is 1209°C, using the formula ③ above to calculate T nr The temperature is 909°C, and the differential scanning calorimeter (DSC) is used to test and measure A in accordance with JY / T0...

Embodiment 2

[0101] Provide a kind of steel plate, the chemical composition of steel plate comprises in mass percent: C:0.10%, Si:0.15%, Mn:1.42%, P:0.011%, S:0.004%, Cr:0.12%, Ni:0.12%, Nb: 0.014%, Ti: 0.014%, Alt: 0.035%, N: 0.0039%, the rest is iron and unavoidable impurities, carbon equivalent CEV: 0.369%.

[0102] The production method of the steel plate includes the following three steps.

[0103] (1) Heating process

[0104] The chemical composition of the continuous casting slab used includes: C: 0.10%, Si: 0.15%, Mn: 1.42%, P: 0.011%, S: 0.004%, Cr: 0.12%, Ni: 0.12%, Nb : 0.014%, Ti: 0.014%, Alt: 0.035%, N: 0.0039%, the rest is iron and unavoidable impurities, carbon equivalent CEV: 0.369%.

[0105] T is calculated by formula ① as above NbC is 1190°C, T is calculated using the formula ② above NbN is 1203°C, using the formula ③ above to calculate T nrIt is 919°C, and it is tested and measured by differential scanning calorimeter (DSC) according to JY / T0589.3-2020 industry stan...

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Abstract

The invention discloses a structural steel plate for wind power and a production method thereof. Chemical composition of steel plate: C:0.075%~0.115%, Si:0.11%~0.19%, Mn:1.39%~1.49%, Cr:0.08%~0.16%, Ni:0.08%~0.16%, Nb:0.012%~ 0.018%, Ti: 0.008%~0.016%, Alt: 0.025%~0.045%, the rest is iron, carbon equivalent 0.355%~0.370%. The steel plate is prepared by sequentially heating the continuous casting slab, rolling in the recrystallization zone, rolling in the non-recrystallization zone, rolling in the two-phase zone and air cooling in the cooling bed. The steel plate is a multi-phase structure composed of polygonal ferrite, deformation-induced ferrite and bainite, which not only has low cost and high production rhythm, but also has excellent welding performance, strength and toughness, and plate shape.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a structural steel plate for wind power and a production method thereof. Background technique [0002] Structural steel for wind power is mainly used to manufacture wind power tower tower structure. As the capacity of wind power generators increases from 1500kW to 3000kW, the diameter of the wind turbine rotor increases from 70 meters to 90 meters, and the height of the wind power tower increases from 65 meters to 100 meters. High requirements require steel plates to have high strength, high toughness, excellent welding performance, and good shape. [0003] At present, in the technology of structural steel plates for wind power: some use high C, Mo, V, and rare earth composition systems in terms of chemical composition, which have problems of poor welding performance and high alloy cost; some use controlled rolling and controlled cooling technology in production techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/48C22C38/06C22C38/04C22C38/02C21D8/02
CPCC22C38/50C22C38/48C22C38/06C22C38/04C22C38/02C21D8/0226C21D2211/005C21D2211/002
Inventor 镇凡曲锦波陆春洁邵春娟
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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