CN110653580A - Method for processing offshore wind power flange - Google Patents
Method for processing offshore wind power flange Download PDFInfo
- Publication number
- CN110653580A CN110653580A CN201911075835.2A CN201911075835A CN110653580A CN 110653580 A CN110653580 A CN 110653580A CN 201911075835 A CN201911075835 A CN 201911075835A CN 110653580 A CN110653580 A CN 110653580A
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- flange
- forging
- wind power
- seawater
- offshore wind
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a method for processing an offshore wind power flange, which comprises the following steps: s1: smelting, namely smelting by adopting an electric furnace smelting and an external refining, and casting to form a six-nickel alloy blank; s2: forging, namely forging the six-nickel alloy blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 3.5; s3: heat treatment; s4: performing surface machining, namely performing rough machining on the flange after grinding visible defects to meet the requirements of flaw detection inspection; s5: carrying out ultrasonic nondestructive testing on the flange; s6: performing finish machining and drilling on the flange subjected to nondestructive testing; s7: cleaning the surface of the flange, and spraying an anticorrosive layer on the cleaned flange; s8: sampling and detecting the flange, and soaking the flange in a closed container filled with seawater; s9: and (5) coating engine oil on the surface of the flange after sampling detection, and then packaging and warehousing.
Description
Technical Field
The invention relates to a method for processing an offshore wind power flange.
Background
Sea water contains abundant seawater chemical resources, and more than 80 chemical substances in the sea water are found, wherein 11 elements (chlorine, sodium, magnesium, potassium, sulfur, calcium, bromine, carbon, strontium, boron and fluorine) account for more than 99.8 percent of the total dissolved matters in the sea water, and more than 50 extractable chemical substances are obtained. The ocean can provide material resources, space resources and energy for human beings to live and develop, and because of the particularity of ocean resources, the equipment required for offshore operation must consider the characteristics and environmental protection of the ocean, wherein the corrosion resistance is the first place, the ocean seawater corrosion is mainly chloride ion corrosion, the ocean chloride ions can damage a metal oxide film protective layer to form pitting corrosion or pitting corrosion, and intergranular corrosion can occur to metals. The areas of the passivation film damaged by the tensile stress of the metal can crack and become the anode area of the corrosion cell, and continued electrochemical corrosion can eventually lead to cracking of the metal.
Although the corrosion resistance of the offshore wind power flange is enhanced to a certain extent by the existing flange manufacturing enterprises after the chemical components of the wind power flange are optimized, a lot of unqualified products exist, although 24-hour pitting corrosion test is carried out in 6% ferric trichloride solution according to the ASTM G48-A method, any test cannot simulate the use of the product in a real use environment, and therefore the offshore wind power flange corrosion resistance test is particularly important for the corrosion resistance test after flange forging, especially for the corrosion resistance test under the simulated flange working environment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for processing an offshore wind power flange.
In order to achieve the purpose, the technical scheme of the invention is to design a processing method of an offshore wind power flange, which comprises the following steps:
s1: smelting, namely smelting by adopting an electric furnace smelting and an external refining, and casting to form a six-nickel alloy blank;
s2: forging, namely forging the six-nickel alloy blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 3.5;
s3: heat treatment; normalizing and tempering are adopted, the normalizing temperature is 860-1080 ℃, the normalizing heat preservation time is determined according to the thickness size of the forging and is calculated according to 2-2.5min/mm, after the heat preservation is finished, the flange is subjected to oil cooling and is cooled to 500 +/-10 ℃, the tempering treatment is carried out, the tempering temperature is 540-720 ℃, the tempering heat preservation time is determined according to the thickness size of the forging and is calculated according to 1.8-2min/mm, and the flange is air-cooled to the room temperature after the heat preservation is finished;
s4: performing surface machining, namely performing rough machining on the flange after grinding visible defects to meet the requirements of flaw detection inspection;
s5: carrying out ultrasonic nondestructive testing on the flange;
s6: performing finish machining and drilling on the flange subjected to nondestructive testing;
s7: cleaning the surface of the flange, and spraying an anticorrosive layer on the cleaned flange;
s8: sampling and detecting the flange, and soaking the flange in a closed container filled with seawater;
s9: and (5) coating engine oil on the surface of the flange after sampling detection, and then packaging and warehousing.
The further improvement is that: in step S8, sodium chloride is gradually added to the seawater during the soaking process to gradually increase the chloride ion content in the seawater.
The further improvement is that: in step S8, the temperature of the seawater is gradually raised during the soaking process
The further improvement is that: the anticorrosive layer is high-molecular ceramic polymer wear-resistant corrosion-resistant protective glue or inorganic polymer coating.
The invention has the advantages and beneficial effects that: the existing six-nickel alloy with strong corrosion resistance is used as a blank to forge the flange, the corrosion-resistant layer is sprayed on the surface of the flange after forging, the corrosion resistance of the flange is further improved, compared with the optimization and research of the components of the flange, the corrosion resistance of a product is further ensured on the premise of reducing the production cost, in addition, a sampling corrosion-resistant test is carried out before the product leaves a factory, the working environment is simulated to carry out actual inspection on the product quality, and the qualification rate of the product is ensured.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A method for processing an offshore wind power flange comprises the following steps:
s1: smelting, namely smelting by adopting an electric furnace smelting and an external refining, and casting to form a six-nickel alloy blank;
s2: forging, namely forging the six-nickel alloy blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 3.5;
s3: heat treatment; normalizing and tempering are adopted, the normalizing temperature is 860-1080 ℃, the normalizing heat preservation time is determined according to the thickness size of the forging and is calculated according to 2-2.5min/mm, after the heat preservation is finished, the flange is subjected to oil cooling and is cooled to 500 +/-10 ℃, the tempering treatment is carried out, the tempering temperature is 540-720 ℃, the tempering heat preservation time is determined according to the thickness size of the forging and is calculated according to 1.8-2min/mm, and the flange is air-cooled to the room temperature after the heat preservation is finished;
s4: performing surface machining, namely performing rough machining on the flange after grinding visible defects to meet the requirements of flaw detection inspection;
s5: carrying out ultrasonic nondestructive testing on the flange;
s6: performing finish machining and drilling on the flange subjected to nondestructive testing;
s7: cleaning the surface of the flange, and spraying an anticorrosive layer on the cleaned flange;
s8: sampling and detecting the flange, and soaking the flange in a closed container filled with seawater;
s9: and (5) coating engine oil on the surface of the flange after sampling detection, and then packaging and warehousing.
In order to reduce the time of the corrosion resistance test and improve the test efficiency, step S8, sodium chloride is gradually added into the seawater during the soaking process to gradually increase the content of chloride ions in the seawater, and at the same time, the temperature of the seawater is gradually increased during the soaking process, and sodium chloride is gradually added into the seawater during the test process to increase the content of chloride ions in the seawater and simultaneously gradually increase the temperature of the seawater, thereby accelerating the corrosion efficiency of chloride ions in the seawater, and reducing the time of the corrosion resistance test and improving the efficiency.
In the embodiment, the corrosion-resistant layer is KN17 high-molecular ceramic polymer wear-resistant corrosion-resistant protective glue or ZS-711 inorganic polymer paint.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The method for processing the offshore wind power flange is characterized by comprising the following steps of:
s1: smelting, namely smelting by adopting an electric furnace smelting and an external refining, and casting to form a six-nickel alloy blank;
s2: forging, namely forging the six-nickel alloy blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 3.5;
s3: heat treatment; normalizing and tempering are adopted, the normalizing temperature is 860-1080 ℃, the normalizing heat preservation time is determined according to the thickness size of the forging and is calculated according to 2-2.5min/mm, after the heat preservation is finished, the flange is subjected to oil cooling and is cooled to 500 +/-10 ℃, the tempering treatment is carried out, the tempering temperature is 540-720 ℃, the tempering heat preservation time is determined according to the thickness size of the forging and is calculated according to 1.8-2min/mm, and the flange is air-cooled to the room temperature after the heat preservation is finished;
s4: performing surface machining, namely performing rough machining on the flange after grinding visible defects to meet the requirements of flaw detection inspection;
s5: carrying out ultrasonic nondestructive testing on the flange;
s6: performing finish machining and drilling on the flange subjected to nondestructive testing;
s7: cleaning the surface of the flange, and spraying an anticorrosive layer on the cleaned flange;
s8: sampling and detecting the flange, and soaking the flange in a closed container filled with seawater;
s9: and (5) coating engine oil on the surface of the flange after sampling detection, and then packaging and warehousing.
2. The method for processing an offshore wind power flange according to claim 1, wherein in step S8, sodium chloride is gradually added to the seawater during the soaking process to gradually increase the content of chloride ions in the seawater.
3. The method for processing an offshore wind power flange according to claim 1, wherein in step S8, the temperature of the seawater is gradually raised during the soaking process.
4. The method for processing an offshore wind power flange according to claim 1, wherein the corrosion-resistant layer is a high-molecular ceramic polymer wear-resistant corrosion-resistant protective glue or an inorganic polymer coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911075835.2A CN110653580A (en) | 2019-11-06 | 2019-11-06 | Method for processing offshore wind power flange |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911075835.2A CN110653580A (en) | 2019-11-06 | 2019-11-06 | Method for processing offshore wind power flange |
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| CN110653580A true CN110653580A (en) | 2020-01-07 |
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| CN201911075835.2A Pending CN110653580A (en) | 2019-11-06 | 2019-11-06 | Method for processing offshore wind power flange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821183A (en) * | 2023-02-14 | 2023-03-21 | 沧州泰昌管道装备有限公司 | Manufacturing process of high-temperature-resistant nickel-based alloy flange |
Citations (7)
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| JPH0518368A (en) * | 1991-07-05 | 1993-01-26 | Mitsubishi Materials Corp | Manufacture of geared member of rotation geared pump having fine tooth formed face in material |
| US20050151546A1 (en) * | 2004-01-08 | 2005-07-14 | Taber Bruce E. | Electrically-based fluid corrosion/erosion protection apparatus and associated methods |
| CN102851609A (en) * | 2012-05-23 | 2013-01-02 | 江阴市恒润重工股份有限公司 | Material used in offshore wind power equipment, and workpiece manufacturing process |
| CN104791564A (en) * | 2015-03-31 | 2015-07-22 | 无锡市华尔泰机械制造有限公司 | C276 Hastelloy alloy flange and production technology thereof |
| CN107058877A (en) * | 2017-06-15 | 2017-08-18 | 山东伊莱特重工股份有限公司 | A kind of low temperature environment wind power flange preparation method |
| CN109030329A (en) * | 2018-08-06 | 2018-12-18 | 江苏科技大学 | A kind of naval vessel seawaterline sun iron flange corrosion resistance pilot system and method |
| CN109100299A (en) * | 2018-09-28 | 2018-12-28 | 山东大学 | The simulator and method of bolted discontinuous rock accelerated corrosion under marosion environment |
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2019
- 2019-11-06 CN CN201911075835.2A patent/CN110653580A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0518368A (en) * | 1991-07-05 | 1993-01-26 | Mitsubishi Materials Corp | Manufacture of geared member of rotation geared pump having fine tooth formed face in material |
| US20050151546A1 (en) * | 2004-01-08 | 2005-07-14 | Taber Bruce E. | Electrically-based fluid corrosion/erosion protection apparatus and associated methods |
| CN102851609A (en) * | 2012-05-23 | 2013-01-02 | 江阴市恒润重工股份有限公司 | Material used in offshore wind power equipment, and workpiece manufacturing process |
| CN104791564A (en) * | 2015-03-31 | 2015-07-22 | 无锡市华尔泰机械制造有限公司 | C276 Hastelloy alloy flange and production technology thereof |
| CN107058877A (en) * | 2017-06-15 | 2017-08-18 | 山东伊莱特重工股份有限公司 | A kind of low temperature environment wind power flange preparation method |
| CN109030329A (en) * | 2018-08-06 | 2018-12-18 | 江苏科技大学 | A kind of naval vessel seawaterline sun iron flange corrosion resistance pilot system and method |
| CN109100299A (en) * | 2018-09-28 | 2018-12-28 | 山东大学 | The simulator and method of bolted discontinuous rock accelerated corrosion under marosion environment |
Non-Patent Citations (3)
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| 《船体结构钢》编写组: "《船体结构钢》", 31 October 1977 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821183A (en) * | 2023-02-14 | 2023-03-21 | 沧州泰昌管道装备有限公司 | Manufacturing process of high-temperature-resistant nickel-based alloy flange |
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Application publication date: 20200107 |