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Flange material for wind power tower and preparation method thereof

A technology of using flanges for wind power towers, applied in the field of materials, can solve the problems of low flange strength, rough surface, non-corrosion resistance, etc.

Active Publication Date: 2020-04-21
山西兴旺达锻压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flanges used in the prior art have the disadvantages of low strength, no impact resistance, no corrosion resistance, and rough surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A flange material for a wind power tower, comprising the following chemical components in terms of mass fraction: 0.16% carbon, 0.5% silicon; 1.2% manganese; 0.4% tungsten; 1.7% nickel; 0.18% molybdenum; 2.4% chromium; Ni 2.0; Vanadium 0.16%; copper 0.13%; aluminum 0.16%; rare earth alloy 1%; sulfur ≤ 0.01%, phosphorus ≤ 0.012%; the rest is iron;

[0025] The mass percentage of each component of the rare earth is 30% of praseodymium, 20% of lanthanum, 15% of cerium, 12% of promethium, 17% of europium, and 100% of yttrium.

[0026] The preparation method of described flange material, comprises the following steps:

[0027] (1) Hot metal desulfurization

[0028] After the molten iron is pretreated, the sulfur content in the molten iron is ≤0.005%.

[0029] (2) Smelting

[0030] The desulfurized molten iron is smelted. When the temperature of the molten iron is higher than 1350°C, copper, nickel-iron alloy, and molybdenum-iron alloy are added. During the smelting proces...

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PUM

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Abstract

The invention provides a wind turbine tower flange material. The flange material comprises the following chemical components of, by mass, 0.16% of carbon, 0.5% of silicon, 1.2% of manganese, 0.4% of tungsten, 1.7% of nickel, 0.18% of molybdenum, 2.4% of chromium, 2.0% of Ni, 0.16% of vanadium, 0.13% of copper, 0.16% of aluminum, 1% of a rare earth alloy, less than or equal to 0.01% of sulfur, lessthan or equal to 0. 012% of phosphorus and the balance iron. The invention further provides a preparation method of the flange material. The flange material prepared through the preparation method has the yield strength of 500 MPa, the tensile strength of 700 MPa, the impact absorption power of 150J and 80J at minus 40 DEG C and minus 60 DEG C respectively, the surface roughness of 0.6 microns, the annual average corrosion rate of 0.1mm / a, and the percentage elongation after fracture (Z) of 45%.

Description

technical field [0001] The invention relates to a flange material for a wind power tower and a preparation method thereof, belonging to the field of material technology. Background technique [0002] Wind energy is a renewable and clean energy, and the use of wind energy for power generation has been paid more and more attention. Wind power has become the fastest growing new energy industry in the world today. The tower of the wind turbine is an important part connected to the wind turbine. It bears the thrust, torque, bending moment, gyro torque, vibration of the motor, and swing when the force changes on the impeller, which is related to the entire wind turbine. operational safety and service life. [0003] The wind turbine tower is tall and slender, which is a typical high-rise structure. The design of the tower is an indispensable part of the wind turbine design. Due to its beautiful appearance, small space occupation and high support height, steel conical towers are w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C21C7/10C21D6/00C22C33/04
Inventor 陆洪芳孙建梅
Owner 山西兴旺达锻压有限公司