CN106521395A - Anti-corrosion and anti-abrasion method for water turbine blades - Google Patents
Anti-corrosion and anti-abrasion method for water turbine blades Download PDFInfo
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- CN106521395A CN106521395A CN201611011501.5A CN201611011501A CN106521395A CN 106521395 A CN106521395 A CN 106521395A CN 201611011501 A CN201611011501 A CN 201611011501A CN 106521395 A CN106521395 A CN 106521395A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hydraulic Turbines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses an anti-corrosion and anti-abrasion method for water turbine blades. The method comprises the following steps that (1) the surfaces of the blades are subjected to sand blasting for coarsening; (2) the surfaces of the coarsened blades are washed with acetone and ethyl alcohol and then dried; (3) slurry is prepared from 20-45 wt% of hard WC ceramic particles and the balance NiCrMoSiB powder alloy, the slurry is evenly smeared on the surfaces of the blades, and drying is conducted at the temperature of 90-130 DEG C; and (4) supersonic speed flame spraying is conducted on the surfaces of the blades with dimethylmethane gas as fuel, high-pressure oxygen as combustion-supporting gas, nitrogen as powder conveying gas, and WC/NiCrMoSiB abrasion resistance coatings covering the surfaces of the blades in a molten mode are obtained, wherein during spraying, the dimethylmethane pressure is 0.55-0.7 MPa, the dimethylmethane flow is 20-30 L/min, the oxygen pressure is 0.65-0.7 MPa, the oxygen flow is 180-200 L/min, the nitrogen pressure is 0.85-1 MPa, the nitrogen flow is 18-30 L/min, and the spraying thickness is 700 [mu]m-2 mm,. After the anti-corrosion and anti-abrasion method for the water turbine blades is tried out in a silt river for a month, obvious abrasion and corrosion traces are not found.
Description
Technical field
The present invention relates to field of material technology, more particularly to a kind of turbine blade anticorrosion abrasionproof etching method.
Background technology
Abrasion wear phenomena all generally existing in many industries such as water conservancy, water power, machinery, weaving and metallurgy, and it is non-
Chang Yanchong, the economic loss for thereby resulting in can quite show.China is very huge in the spending of this aspect, especially water conservancy, water power
Department more projects.This is because China's silt content of river is big, complete excessively annual river of the sedimentary loading more than 10,000,000 tons of transporting is up to 115
Bar, according to first place in the world.Calendar year 2001 relevant statistics show Ml, and national power station total installation of generating capacity is 80.05GW, gross generation
For 2184.5 hundred million kW/h, wherein 105,600,000,000 kW h are located at the big areas of silt content of river such as northwest, southwest and North China, these are regional
Component of Hydraulic Turbines not only washed away by high-velocity flow, denuded and mechanical force is acted on, but also by being mingled with current
The abrasion of the media such as silt, ablation destruction, therefore the consume of material is very serious.In addition, in the power station of Central-South, East China,
Although because silt content of river is few, Component of Hydraulic Turbines receives that sand erosion loss is little, the cavitation of current is at deep water to water
The destruction of engine blade wheel material is then quite serious.Data shows that a large-scale power station is used for changing, repairing every year according to the relevent statistics
The expense of water conservancy machinery up to more than million yuan, therefore, solve hydraulic abrasion, erosion problem, it is very necessary.
A kind of most economical, most efficient method is exactly that the high anti-corrosion painting of high abrasion is coated on the blade and arbor of the hydraulic turbine
Layer, and wear resistant corrosion resistant metal coating is as its coating processes is simple, economic and effect is obvious, it is deep to be favored by people.
The content of the invention
It is an object of the invention to propose a kind of turbine blade anticorrosion abrasionproof etching method, resist can turbine blade
Abrasion is simultaneously anticorrosive.
It is that, up to this purpose, the present invention is employed the following technical solutions：
A kind of turbine blade anticorrosion abrasionproof etching method, which includes：
(1) sandblasting roughening is carried out in blade surface；
(2) it is with acetone and ethanol purge roughening blade surface and dry；
(3) proportioning of 20-45wt%, NiCrMoSiB powder metallurgy surplus is accounted for according to hard WC ceramic particles, slurry is made
Material, by the slurry uniform application in blade surface, is dried at 90-130 DEG C；
(4) propane gas are adopted for fuel, high pressure oxygen is combustion-supporting gas, and nitrogen is powder feeding gas, and blade surface is carried out
HVAF, during spraying, propane pressure is 0.55-0.7MPa, and flow is 20-30L/min, and oxygen pressure is 0.65-
0.7MPa, flow are 180-200L/min, and nitrogen pressure is 0.85-1MPa, and flow is 18-30L/min, and coating thickness is 700 μ
M-2mm, obtains cladding in the WC/NiCrMoSiB wear-resistant coatings of blade surface.
NiCrMoSiB powder metallurgies of the present invention, its composition percentage composition by weight include Cr 10-15%, Ni
3-7%, Mo 2-6%, Si 1-5%, B 2-4%, surplus Ni.
Preferably, WC ceramic particles account for 30-40wt%, further preferred 35wt%.
The wear-resistant coating that the present invention is prepared, goes to form metallurgical binding with matrix, and bond strength is more than 600MPa, coating
For even tissue, the as cast condition crystalline structure of dense non-porous, its coating hardness is up to more than 80 Rockwell hardness, service life compared to
Blade without coating extends more than 6-7 times, and anti-cavitation ability improves more than 10 times.
The WC/NiCrMoSiB wear-resistant coatings that the present invention is prepared, which possesses the advantage of ceramic coating, not only anti scuffing,
It is also anticorrosive.Jing is tried out 1 month in waste stream, does not find significantly abrasion and evidence of corrosion.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of turbine blade anticorrosion abrasionproof etching method, which includes：
(1) sandblasting roughening is carried out in blade surface；
(2) it is with acetone and ethanol purge roughening blade surface and dry；
(3) proportioning of 20wt%, NiCrMoSiB powder metallurgy surplus is accounted for according to hard WC ceramic particles, slurry is made, will
The slurry uniform application is dried at 90 DEG C in blade surface；
(4) propane gas are adopted for fuel, high pressure oxygen is combustion-supporting gas, and nitrogen is powder feeding gas, and blade surface is carried out
HVAF, during spraying, propane pressure is 0.55MPa, and flow is 20L/min, and oxygen pressure is 0.65MPa, flow
For 180L/min, nitrogen pressure is 0.85MPa, and flow is 18L/min, and coating thickness is 700 μm, obtains cladding in blade surface
WC/NiCrMoSiB wear-resistant coatings.
Embodiment 2
A kind of turbine blade anticorrosion abrasionproof etching method, which includes：
(1) sandblasting roughening is carried out in blade surface；
(2) it is with acetone and ethanol purge roughening blade surface and dry；
(3) proportioning of 45wt%, NiCrMoSiB powder metallurgy surplus is accounted for according to hard WC ceramic particles, slurry is made, will
The slurry uniform application is dried at 130 DEG C in blade surface；
(4) propane gas are adopted for fuel, high pressure oxygen is combustion-supporting gas, and nitrogen is powder feeding gas, and blade surface is carried out
HVAF, during spraying, propane pressure is 0.7MPa, and flow is 30L/min, and oxygen pressure is 0.7MPa, and flow is
200L/min, nitrogen pressure are 1MPa, and flow is 30L/min, and coating thickness is 2mm, obtains cladding in the WC/ of blade surface
NiCrMoSiB wear-resistant coatings.
Embodiment 3
A kind of turbine blade anticorrosion abrasionproof etching method, which includes：
(1) sandblasting roughening is carried out in blade surface；
(2) it is with acetone and ethanol purge roughening blade surface and dry；
(3) proportioning of 35wt%, NiCrMoSiB powder metallurgy surplus is accounted for according to hard WC ceramic particles, slurry is made, will
The slurry uniform application is dried at 100 DEG C in blade surface；
(4) propane gas are adopted for fuel, high pressure oxygen is combustion-supporting gas, and nitrogen is powder feeding gas, and blade surface is carried out
HVAF, during spraying, propane pressure is 0.6MPa, and flow is 25L/min, and oxygen pressure is 0.67MPa, and flow is
190L/min, nitrogen pressure are 0.95MPa, and flow is 25L/min, and coating thickness is 1mm, obtains cladding in blade surface
WC/NiCrMoSiB wear-resistant coatings.
The turbine blade that embodiment 1-3 is prepared, Jing are tried out 1 month in waste stream, do not find significantly mill
Erosion and evidence of corrosion.
Claims (3)
1. a kind of turbine blade anticorrosion abrasionproof etching method, which includes：
(1) sandblasting roughening is carried out in blade surface；
(2) it is with acetone and ethanol purge roughening blade surface and dry；
(3) proportioning of 20-45wt%, NiCrMoSiB powder metallurgy surplus is accounted for according to hard WC ceramic particles, slurry is made, will
The slurry uniform application is dried at 90-130 DEG C in blade surface；
(4) propane gas are adopted for fuel, and high pressure oxygen is combustion-supporting gas, and nitrogen is powder feeding gas, Supersonic is carried out to blade surface
Fast flame-spraying, during spraying, propane pressure is 0.55-0.7MPa, and flow is 20-30L/min, and oxygen pressure is 0.65-
0.7MPa, flow are 180-200L/min, and nitrogen pressure is 0.85-1MPa, and flow is 18-30L/min, and coating thickness is 700 μ
M-2mm, obtains cladding in the WC/NiCrMoSiB wear-resistant coatings of blade surface.
2. turbine blade anticorrosion abrasionproof etching method as claimed in claim 1, it is characterised in that described NiCrMoSiB
Powder metallurgy, its composition percentage composition by weight include Cr 10-15%, Ni 3-7%, Mo 2-6%, Si 1-5%, B 2-
4%, surplus Ni.
3. turbine blade anticorrosion abrasionproof etching method as claimed in claim 1 or 2, it is characterised in that WC ceramic particles are accounted for
30-40wt%, further preferred 35wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011501.5A CN106521395A (en) | 2016-11-17 | 2016-11-17 | Anti-corrosion and anti-abrasion method for water turbine blades |
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| CN201611011501.5A CN106521395A (en) | 2016-11-17 | 2016-11-17 | Anti-corrosion and anti-abrasion method for water turbine blades |
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| CN201611011501.5A Pending CN106521395A (en) | 2016-11-17 | 2016-11-17 | Anti-corrosion and anti-abrasion method for water turbine blades |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604287A (en) * | 2017-07-29 | 2018-01-19 | 江苏华海冶金机械设备有限公司 | Corrosion-resistant sinking roller |
| CN111500895A (en) * | 2020-04-27 | 2020-08-07 | 龙口中宇热管理系统科技有限公司 | Metal part surface repairing material, metal part surface treatment process and application |
| CN113025944A (en) * | 2021-03-04 | 2021-06-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925847A (en) * | 2012-11-06 | 2013-02-13 | 华北水利水电学院 | Method for preparing submicron abrasion and corrosion resisting coating of flow passage component of water turbine |
| CN103510035A (en) * | 2012-06-15 | 2014-01-15 | 西安宇丰喷涂技术有限公司 | Anti-scuffing treatment method for surface of water turbine |
| CN104862571A (en) * | 2015-06-16 | 2015-08-26 | 武汉理工大学 | Multi-scale nanostructured WC-CoCr metal ceramic composite powder |
-
2016
- 2016-11-17 CN CN201611011501.5A patent/CN106521395A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510035A (en) * | 2012-06-15 | 2014-01-15 | 西安宇丰喷涂技术有限公司 | Anti-scuffing treatment method for surface of water turbine |
| CN102925847A (en) * | 2012-11-06 | 2013-02-13 | 华北水利水电学院 | Method for preparing submicron abrasion and corrosion resisting coating of flow passage component of water turbine |
| CN104862571A (en) * | 2015-06-16 | 2015-08-26 | 武汉理工大学 | Multi-scale nanostructured WC-CoCr metal ceramic composite powder |
Non-Patent Citations (1)
| Title |
|---|
| 徐润生等: "《NiCrBSi/WC涂层及涂层开裂处抗蚀行为研究》", 《中国表面工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604287A (en) * | 2017-07-29 | 2018-01-19 | 江苏华海冶金机械设备有限公司 | Corrosion-resistant sinking roller |
| CN111500895A (en) * | 2020-04-27 | 2020-08-07 | 龙口中宇热管理系统科技有限公司 | Metal part surface repairing material, metal part surface treatment process and application |
| CN113025944A (en) * | 2021-03-04 | 2021-06-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
| CN113025944B (en) * | 2021-03-04 | 2023-01-13 | 哈动国家水力发电设备工程技术研究中心有限公司 | Corrosion protection method for movable guide vane of seawater pump water turbine |
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Application publication date: 20170322 |