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Material used in offshore wind power equipment, and workpiece manufacturing process

A technology for offshore wind power and wind power equipment, which is used in manufacturing tools, heat treatment equipment, furnace types, etc., and can solve problems such as poor corrosion resistance, poor corrosion resistance of Mn elements, and negative effects of corrosion resistance.

Active Publication Date: 2013-01-02
JIANGYIN HENGRUN HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] c. Q345E steel is a low-alloy structural steel with high Mn (manganese) content. As we all know, Mn element is not corrosion-resistant, and has a negative effect on corrosion resistance. The corrosion resistance of Q345E steel is not as good as that of Q235E low-carbon steel

Method used

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  • Material used in offshore wind power equipment, and workpiece manufacturing process
  • Material used in offshore wind power equipment, and workpiece manufacturing process
  • Material used in offshore wind power equipment, and workpiece manufacturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The comparison of the chemical composition and mechanical properties between the existing Q345E grade and the material (Q460E new grade) low-alloy steel used in the present invention for offshore wind power equipment is shown in Table 1 and Table 2:

[0064] Table 1 Chemical composition wt%

[0065]

[0066] Table 2 Mechanical properties (thickness 100~150mm)

[0067]

[0068] 1. The production process is as follows:

[0069] High-quality molten iron, KR molten iron pretreatment, 120-ton top-bottom composite blowing converter, argon blowing treatment, LF furnace refining, VD vacuum degassing treatment, continuous casting round billet (φ600~800mm), stack cooling, sawing and blanking, billet heating , Free forging, punching, precision pressing, heat treatment, machining, flaw detection, inspection, packaging and storage.

[0070] 2. Preparation steps

[0071] 1) KR hot metal pretreatment

[0072] When the hot metal arrives at the station, the slag should be ...

Embodiment 2

[0097] Now compare the actual chemical composition and mechanical properties of the Q345E grade with the material (Q460E new grade) used in offshore wind power equipment according to the present invention, see Table 3 and Table 4.

[0098] Table 3 Chemical composition wt%

[0099]

[0100] Table 4 mechanical properties (thickness 100~150mm)

[0101] 1,

[0102] 2, the production process is the same as in Example 1;

[0103] 3. Preparation steps

[0104] Preparation steps 1) to 12) are the same as in Example 1; the difference is that the chemical composition of the material (Q460E) used for offshore wind power equipment is controlled within the middle limit range, especially the oxygen content in the steel is controlled below 2.5ppm, and the sulfur ≤ 0.007% , rare earth ≥ 0.04%, so that the RE / S mass ratio is > 5 times, and the steel contains 0.04wt% niobium;

Embodiment 3

[0106] Now compare the actual chemical composition and mechanical properties of Q345E with the material (Q460E new grade) used in offshore wind power equipment according to the present invention, see Table 5 and Table 6

[0107] Table 5 Chemical composition wt%

[0108]

[0109] Table 6 mechanical properties (thickness 100 ~ 150mm)

[0110]

[0111] 1. The production process is the same as in Example 1.

[0112] 2. Preparation steps 1) to 12) are the same as in Example 1, except that the chemical composition of the material (Q460E new brand) used for offshore wind power equipment is controlled within the upper limit range, especially the oxygen content in the steel is controlled at 2.0ppm , sulfur ≤ 0.005%, rare earth ≥ 0.05%, and the steel contains 0.03wt% titanium;

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Abstract

The invention discloses a material used in offshore wind power equipment, and a workpiece manufacturing process. The material comprises the chemical components of carbon, silicon, manganese, phosphorous, sulfur, chromium, nickel, molybdenum, vanadium, copper and rare earth, and balance of iron and inevitable impurities. According to the invention, through steps of high-quality molten iron selecting, KR molten iron pre-treating, top and bottom composite converter blowing, argon blowing treating, LF furnace refining, VD vacuum degassing treating, round billet continuous casting, heap cooling, sawing and blanking, billet heating, free forging, punching, fine coining, heat treating, mechanical processing, flaw detecting, inspecting, packaging, storing, and the like, a material used in key components of offshore wind power equipment of more than 5 megawatts can be produced. The material is advantageous than Q345E-performance steel, high yield strength, good low-temperature impact toughness, and better marine-atmosphere-corrosion resistance. The invention adopts a serried of optimizing technical measures upon smelting and manufacturing processes of the steel, such that user requirements are satisfied.

Description

technical field [0001] The invention relates to the content of alloy elements and trace elements in metal materials, heat treatment process and flange ring manufacturing process, and specifically relates to a high-strength low-alloy structural steel that meets high salt spray corrosion at sea; it is mainly used for processing towers of offshore wind turbines Structural parts such as frame flanges and tower bodies belong to the field of ferrous metal alloy materials. Background technique [0002] my country's energy structure and energy sustainable development must meet the requirements of the sustainable development of the national economy. Therefore, it is imperative to vigorously develop my country's wind power energy construction. The "National Energy Science and Technology "Twelfth Five-Year" Plan" puts forward the requirement of large-scale wind turbines. In the next five years, it is a brand-new topic to develop the complete machine manufacturing technology of 6-10 MW ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C38/48C22C38/50C21C1/02C21C7/10C21C7/072B22D11/18C21D8/00C21D9/40B23P15/00
Inventor 承立新周洪亮戴宝昌缪惠民杨家灼张伟
Owner JIANGYIN HENGRUN HEAVY IND
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