CN101974773A - Method for improving stress corrosion resistance of Incone1609 alloy heat transfer tube - Google Patents
Method for improving stress corrosion resistance of Incone1609 alloy heat transfer tube Download PDFInfo
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- CN101974773A CN101974773A CN 201010556105 CN201010556105A CN101974773A CN 101974773 A CN101974773 A CN 101974773A CN 201010556105 CN201010556105 CN 201010556105 CN 201010556105 A CN201010556105 A CN 201010556105A CN 101974773 A CN101974773 A CN 101974773A
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- stress corrosion
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- alloy heat
- chromium
- transfer pipe
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 34
- 239000000956 alloy Substances 0.000 title claims abstract description 34
- 238000012546 transfer Methods 0.000 title claims abstract description 33
- 238000005260 corrosion Methods 0.000 title claims abstract description 31
- 230000007797 corrosion Effects 0.000 title claims abstract description 31
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 34
- 239000011651 chromium Substances 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000007747 plating Methods 0.000 claims abstract description 12
- 229910001098 inconels 690 Inorganic materials 0.000 claims description 30
- 239000011248 coating agent Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 23
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 230000001678 irradiating effect Effects 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- 238000009713 electroplating Methods 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005234 chemical deposition Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 101100532679 Caenorhabditis elegans scc-1 gene Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000002180 anti-stress Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000013532 laser treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Laser Beam Processing (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to a method for improving the stress corrosion resistance of an Incone1609 alloy heat transfer tube, which can improve the stress corrosion resistance of the heat transfer tube considerably. The method improves the stress corrosion resistance of the Incone1609 alloy heat transfer tube by fist plating chromium on the surface of the Incone1609 alloy heat transfer tube by a chromium electroplating process and then strengthening the surface of the chromium plating by laser irradiation.
Description
Technical field
The present invention relates to a kind of method of the Inconel690 of raising alloy heat-transfer pipe stress corrosion resistant ability.
Background technology
Nuclear power is a kind of safe, cleaning, economic novel energy, and along with the rapid increase of the mankind to energy demand, nuclear power has become important energy industry.Vapour generator is the key equipment of pressurized-water reactor nuclear power plant, and its heat-transfer pipe is generally made with the Inconel690 alloy, also is that the weakest link, especially stress corrosion (SCC) and intergranular corrosion (IGA) cause that problem such as pipe break is very outstanding.This class corrosive incidence is quite high, and erosion rate is very fast, often needs unplanned shutdown to check and repair, and causes very big financial loss.1999 American Electric Power institute (EPRI) the investigation data show that 238 operating nuclear power station steam generators have 8546 heat-transfer pipe places under repair, account for about 48% of pipe sum.External service experience shows that about 30%～40% pressurized-water reactor influences normal operation, reduces the power operation or is forced to shutdown because of the steam generator heat-transfer pipe damage.The breakage of heat-transfer pipe is caused by all kinds of corrosion, and wherein, 60% problem belongs to the stress corrosion problem.
Vapour generator causes a loop water loss in case generation is damaged, if moisturizing is untimely, can influence the reactor core heat extraction, even the serious consequence that causes reactor core to burn.Be plugging at present to the common treatment measures of leaking, when vapour generator plugging number account for sum 20% the time, must change vapour generator usually, cause the waste of manpower, financial resources, increase the maintainer and be subjected to radioactive danger.Therefore solving the broken event of running affairs of vapour generator is to be related to the security of Nuclear power plants and to make Nuclear power plants have the key issue of competitive and vitality.
In retrieval to existing patent, found the patent of invention (patent No. 1752293A of " a kind of piston ring surface modifying method of environmental protection " by name, to call " contrast patent " in the following text), this invention adopts physical gas-phase deposite method to add laser surface modification in the piston ring chrome-faced.But what this patent adopted is physical vaporous deposition, and its processing work is size-constrained, and workpiece is yielding, heavy contamination.
Summary of the invention
Purpose of the present invention provides a kind of method of the Inconel690 of raising alloy heat-transfer pipe stress corrosion resistant ability exactly for addressing the above problem, and it can make the ability of the opposing stress corrosion of heat-transfer pipe be greatly improved.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method that improves Inconel690 alloy heat-transfer pipe stress corrosion resistant ability, it carries out electrodeposited chromium technology in Inconel690 alloy tube surface earlier and carries out chromium plating, adopt laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improve the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.
Described electrodeposited chromium process using has technology, thickness of coating 20-60um now.
The process of described laser irradiating method is: adopt solid YAG laser, and average laser power 300-700 watt, wavelength 1.06um; Chromium coating is carried out laser scanning, laser scanning speed 400-500mm/min, spot diameter 1-3mm, laser pulse width 1-20ms, pulse-repetition 5-10Hz adopts argon shield when irradiation.
The present invention carries out electrodeposited chromium technology in Inconel690 alloy tube surface earlier and carries out chromium plating, adopts laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improves the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.Its concrete operations step is as follows:
1, the pre-treatment of Inconel690 alloy tube surface is cleaned Inconel690 alloy tube surface with the method for gasoline cleaning+trieline oil removing earlier, and keeps treating the surfacing cleaning.
2, the method for electroless plating mode-durionise is adopted in chromium plating, and Inconel690 alloy tube surface is carried out chromium plating, and described electrodeposited chromium process using has technology, thickness of coating 20-60um now.
The electrodeposited chromium processing parameter:
Chromium anhydride concentration: 200g/L
Temperature range: 50-60 ℃
Current density: 50A/dm
2
Thickness of coating: 20-60um.
3, laser surface intensified employing solid YAG laser apparatus carries out scanning and irradiation to coating surface, so that the coating homogeneous microstructureization.
The laser surface intensified technique parameter:
Solid YAG laser
Average laser power: 300-700 watt, wavelength 1.06um
Laser scanning speed: 400-500mm/min
Spot diameter: 1-3mm
Pulsewidth: 1-20ms
Pulse-repetition: 5-10Hz
Adopt argon shield during irradiation.
In order to verify the effect of this method, pressure water-water reactor nuclear power station steam generator heat transfer tube Inconel690 alloy bar material prepares the stress corrosion sample, sample to original sample and process LSA processing carries out stress corrosion (cracking) test respectively, resists the ability of stress corrosion after handling through LSA with check Inconel690 alloy heat-transfer pipe.
Earlier sample is carried out surface cleaning, then specimen surface is carried out electrodeposited chromium, described chrome-plated process adopts existing technology, thickness of coating 40um.Again coating is carried out laser surface intensified processing; the process of described laser irradiating method is: adopt solid YAG laser; 700 watts of average laser power; wavelength 1.06um; laser scanning speed 400mm/min, spot diameter 2mm, laser pulse width 4.8ms; pulse-repetition 7Hz adopts argon shield when irradiation.
(1) test method: slow strain original rate test (SSRT)
(2) testing installation: SCC-1 stress corrosion (cracking) test machine
(3) test parameter: strain rate 1 * 10
-6s
-1, test(ing) medium 50%NaOH+0.3%SiO
2+ 0.3%Na
2S
2O
3(massfraction composition) solution, normal temperature and pressure
(4) test-results:
In the table: δ---the unit elongation of sample
The relative reduction in area of RA---sample
CGR---SCC crack growth rate
I---SCC susceptibility index (stress-strain curve integral area)
UTS---maximum stress
As can be seen, after Inconel690 alloy heat-transfer pipe process electrodeposited chromium and the laser surface intensified processing, ability of its opposing stress corrosion is significantly improved.
The invention has the beneficial effects as follows: can carry out surface treatment to more elongated nuclear power station steam generator heat transfer tube with method provided by the invention, workpiece does not have distortion, and the laser treatment chromium coating compact structure that obtains, pore is few, oxide compound is few, homogeneous microstructure, and ability of its opposing stress corrosion significantly improves.After carefully comparing, think that there are following significantly difference in the present invention and contrast patent with the contrast patent:
What (1) the contrast patent adopted is physical gas-phase deposite method chromium plating, and the present invention's employing is chemical deposition chromium plating.
(2) physical gas-phase deposite method of contrast patent employing, the size of workpiece is very restricted, and electro-plating method of the present invention, workpiece size is unrestricted, can be used for the nuclear power station steam generator heat transfer tube of longer dimension.
(3) physical gas-phase deposite method of contrast patent employing is bigger to the heat input of workpiece, can cause workpiece deformation, can not be used for elongated pipe fitting, and the chemical deposition that the present invention adopts does not have heat effect, workpiece does not have thermal distortion, can be used for longer dimension, the nuclear power station steam generator heat transfer tube that rigidity is less.
(4) purpose of contrast patent is to improve the wear resistance of piston ring, and the main creativeness of its invention is the feature of environmental protection of method for protrusion, and the objective of the invention is to improve the anti-stress corrosiveness of steam generator heat exchange tube Inconel690 alloy heat-transfer pipe.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1:
The method of raising Inconel690 alloy heat-transfer pipe stress corrosion resistant ability of the present invention, it is earlier in the chromium plating of Inconel690 alloy tube surface, adopt laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improve the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.
Described chrome-plated process adopts existing technology, thickness of coating 20um.
The process of described laser irradiating method is: adopt solid YAG laser, 300 watts of average laser power, wavelength 1.06um; Chromium coating is carried out laser scanning, laser scanning speed 400mm/min, spot diameter 1mm, laser pulse width 1ms, pulse-repetition 5Hz adopts argon shield when irradiation.
Embodiment 2:
The method of raising Inconel690 alloy heat-transfer pipe stress corrosion resistant ability of the present invention, it is earlier in the chromium plating of Inconel690 alloy tube surface, adopt laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improve the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.
Described chrome-plated process adopts existing technology, thickness of coating 40um.
The process of described laser irradiating method is: adopt solid YAG laser, 500 watts of average laser power, wavelength 1.06um; Chromium coating is carried out laser scanning, laser scanning speed 450mm/min, spot diameter 2mm, laser pulse width 4.8ms, pulse-repetition 7Hz adopts argon shield when irradiation.
Embodiment 3:
The method of raising Inconel690 alloy heat-transfer pipe stress corrosion resistant ability of the present invention, it is earlier in the chromium plating of Inconel690 alloy tube surface, adopt laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improve the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.
Described chrome-plated process adopts existing technology, thickness of coating 60um.
The process of described laser irradiating method is: adopt solid YAG laser, 700 watts of average laser power, wavelength 1.06um; Chromium coating is carried out laser scanning, laser scanning speed 500mm/min, spot diameter 3mm, laser pulse width 20ms, pulse-repetition 10Hz adopts argon shield when irradiation.
Claims (3)
1. method that improves Inconel690 alloy heat-transfer pipe stress corrosion resistant ability, it is characterized in that, it carries out electrodeposited chromium technology in Inconel690 alloy tube surface earlier and carries out chromium plating, adopt laser irradiating method that chromium coating is carried out surface Hardening Treatment then, thereby improve the stress corrosion resistant ability of Inconel690 alloy heat-transfer pipe.
2. the method for raising Inconel690 alloy heat-transfer pipe stress corrosion resistant ability as claimed in claim 1 is characterized in that described electrodeposited chromium process using has technology, thickness of coating 20-60um now.
3. the method for raising Inconel690 alloy heat-transfer pipe stress corrosion resistant ability as claimed in claim 1 is characterized in that the process of described laser irradiating method is: adopt solid YAG laser, and average laser power 300-700 watt, wavelength 1.06um; Chromium coating is carried out laser scanning, laser scanning speed 400-500mm/min, spot diameter 1-3mm, laser pulse width 1-20ms, pulse-repetition 5-10Hz adopts argon shield when irradiation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105561057A CN101974773B (en) | 2010-11-11 | 2010-11-11 | Method for improving stress corrosion resistance of Incone1609 alloy heat transfer tube |
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|---|---|---|---|
| CN2010105561057A CN101974773B (en) | 2010-11-11 | 2010-11-11 | Method for improving stress corrosion resistance of Incone1609 alloy heat transfer tube |
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| Publication Number | Publication Date |
|---|---|
| CN101974773A true CN101974773A (en) | 2011-02-16 |
| CN101974773B CN101974773B (en) | 2012-05-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899696A (en) * | 2011-07-28 | 2013-01-30 | 中国科学院金属研究所 | Method for controlling recrystallization of directionally solidified Ni-based superalloy by coating |
| CN104726914A (en) * | 2015-01-23 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Method for treating surface of heat exchange coil of heat furnace |
| CN104741784A (en) * | 2013-12-25 | 2015-07-01 | 张方浩 | Metal welding process of diagonal pliers |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752293A (en) * | 2005-10-14 | 2006-03-29 | 首都师范大学 | Method for modifying environment protection piston ring surface |
-
2010
- 2010-11-11 CN CN2010105561057A patent/CN101974773B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752293A (en) * | 2005-10-14 | 2006-03-29 | 首都师范大学 | Method for modifying environment protection piston ring surface |
Non-Patent Citations (2)
| Title |
|---|
| 《东北工学院学报》 19931031 才庆魁等 激光辐照镀铬钢合金化工艺与性能研究 第497-501页 第14卷, 第5期 2 * |
| 《中国激光》 19901231 安世民等 激光处理镀铬钢熔渗层的研究 第170-174页 第17卷, 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899696A (en) * | 2011-07-28 | 2013-01-30 | 中国科学院金属研究所 | Method for controlling recrystallization of directionally solidified Ni-based superalloy by coating |
| CN102899696B (en) * | 2011-07-28 | 2016-01-20 | 中国科学院金属研究所 | A kind of coating controls the method for directional solidification nickel-base high-temperature alloy recrystallize |
| CN104741784A (en) * | 2013-12-25 | 2015-07-01 | 张方浩 | Metal welding process of diagonal pliers |
| CN104726914A (en) * | 2015-01-23 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Method for treating surface of heat exchange coil of heat furnace |
| CN104726914B (en) * | 2015-01-23 | 2017-09-29 | 中石化石油工程技术服务有限公司 | A kind of surface treatment method of heating furnace heat exchange coil |
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| Publication number | Publication date |
|---|---|
| CN101974773B (en) | 2012-05-23 |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121227 |
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Effective date of registration: 20121227 Address after: 250002 Ji'nan City Central District, Shandong, No. 2 South Road, No. 500 Patentee after: SHANDONG ELECTRIC POWER Research Institute Patentee after: State Grid Corporation of China Address before: 250002 Ji'nan City Central District, Shandong, No. 2 South Road, No. 500 Patentee before: SHANDONG ELECTRIC POWER Research Institute |
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Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: Shandong Electric Power Research Institute Patentee after: State Grid Corporation of China Address before: 250002, No. 500, South Second Ring Road, Shizhong District, Shandong, Ji'nan Patentee before: Shandong Electric Power Research Institute Patentee before: State Grid Corporation of China |
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Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: SHANDONG ELECTRIC POWER Research Institute Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: State Grid Corporation of China |
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Effective date of registration: 20220128 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA |