CN107267912A - Aluminising protective coating and its preparation method and application - Google Patents
Aluminising protective coating and its preparation method and application Download PDFInfo
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- CN107267912A CN107267912A CN201710514101.4A CN201710514101A CN107267912A CN 107267912 A CN107267912 A CN 107267912A CN 201710514101 A CN201710514101 A CN 201710514101A CN 107267912 A CN107267912 A CN 107267912A
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- aluminising
- protective coating
- zirconium oxide
- coating
- metallic nickel
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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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/04—Diffusion into selected surface areas, e.g. using masks
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a kind of aluminising protective coating and its preparation method and application, the aluminising protective coating is mainly formed by metallic nickel, zirconium oxide and binder making, and the volume ratio of metallic nickel, zirconium oxide and binding agent is 0.7~1.3: 0.7~1.3: 2.The aluminising protective coating, raw material is common to be easy to get, and cheap, cost is low;Less than 900 DEG C pack aluminizings only need to 2~3 layers of coating;It disclosure satisfy that requirement of shelter of the aluminising temperature in 600 DEG C~1020 DEG C of interval during pack aluminizing;The aluminising protective coating is cleared up easily after the completion of aluminising, and protective coating, which is broken into pieces, to be separated with protection matrix, noresidue;The raw material of protective coating is neutrality, and not corrosion protection matrix will not react with high temperature alloy matrix;It will not automatically be peeled off after protective coating aluminising, protective coating and penetration enhancer physical separation can not be polluted penetration enhancer.
Description
Technical field
The present invention relates to thermo-chemical treatment field, especially, it is related to a kind of aluminising protective coating.In addition, the present invention is also related to
And a kind of preparation method and application of above-mentioned aluminising protective coating.
Background technology
With modern Aviation industrial expansion, to the temperature requirement of gas turbine operation also more and more higher.To meet combustion gas
Use demand under turbine high temperature, high rotating speed, strong corrosive environment, gas-turbine blade takes aluminising to handle extensively.By aluminising
The piece surface of processing, after high temperature air cyclic oxidation, forms the Al of even compact2O3Oxide-film, can effectively prevent oxygen to
Matrix spreads.
Pack aluminizing is that a kind of part is embedded in powdered aluminizing medium heats diffusion, is oozed in piece surface formation
The method of aluminium lamination, pack aluminizing can form high-quality and uniform aluminized coating, and solid powder on part with complex appearance
Alumetizing process is simple, and cost is low, widely used by major Aviation Manufacturing Enterprises.
But the tenon of gas-turbine blade is subject to high stress position, notch sensitive can be brought after tenon tooth aluminising, easily
Crack, therefore tenon position is unable to aluminising, and protection tenon position is needed during aluminising processing blade.If protected using surplus
Method, in the aluminising of blade blank state and then carry out tenon processing, blade infiltration layer is easy to damage, and qualification rate is low, therefore state
Generally using the method for aluminising after first processing tenon on border.
Qualified tenon means of defence has to meet several conditions:1st, aluminising protection is effective;2nd, easily cleaning, it is impossible to
In tenon remained on surface protective materials;3rd, the matrix material of tenon can not be polluted;4th, aluminizing medium can not be polluted.
At present, during pack aluminizing, the method for the tenon protection of gas-turbine blade mainly has:1st, using ceramics powder
End is configured to slurry, is coated in tenon position and is protected.This method facilitates feasible, but to reach that effective anti-seepage effect must
Must ten multilayers of coating.2nd, protected using high temperature alloy protective case or ceramic protective sleeve.Tenon, operation are clamped using protective case
Simply, but because protective case need to heat repeatedly, can be deformed, accessory size tolerance, thermal stress the problems such as, sealing is very
It is difficult to ensure card;And protective case volume is larger, batch and actual shove charge during influence aluminising are operated.
The content of the invention
It is non-during pack aluminizing to solve the invention provides a kind of aluminising protective coating and its preparation method and application
Aluminising position needs the technical problem protected.
The technical solution adopted by the present invention is as follows:
A kind of aluminising protective coating, is mainly formed by metallic nickel, zirconium oxide and binder making, metallic nickel, zirconium oxide with
The volume ratio of binding agent is 0.7~1.3: 0.7~1.3: 2.
Further, the volume ratio of metallic nickel, zirconium oxide and binding agent is 1: 1: 2.
Further, binding agent is ethene lacquer;And/or, metallic nickel, zirconium oxide are powdered.
Further, when aluminising protective coating is pack aluminizing in 600 DEG C~1020 DEG C intervals for aluminising temperature
Protection.
According to another aspect of the present invention, a kind of preparation method of above-mentioned aluminising protective coating is additionally provided, including it is following
Step:Metallic nickel and zirconium oxide are made as powdered, binding agent is mixed in proportion with Zirconium oxide powder, then added
Metallic nickel powder is simultaneously stirred, you can obtain the aluminising protective coating.
Further, stir or stand after binding agent is mixed with Zirconium oxide powder, the time of the standing is 5~10h.
According to another aspect of the present invention, a kind of aluminising of above-mentioned aluminising protective coating in turbo blade tenon is additionally provided
Application in protection.
Further, using for aluminising protective coating is coated on turbo blade tenon.
Further, in, when aluminising temperature is less than 700 DEG C, by aluminising protective coating applied in two coats;Aluminising temperature is
At 700 DEG C~900 DEG C, aluminising protective coating is coated three layers;When aluminising temperature is 900 DEG C~1020 DEG C, aluminising is protected and applied
Four layers of material coating.
Further, when aluminising protective coating is coated, often coating one layer needs to spontaneously dry or dries.
The invention has the advantages that:
The aluminising protective coating that the present invention is provided, raw material is common to be easy to get, and cheap, cost is low;It disclosure satisfy that aluminising temperature
Spend requirement of shelter during pack aluminizing in the interval for 600 DEG C~1020 DEG C;Less than 900 DEG C pack aluminizings are only needed to
2~3 layers of coating;The aluminising protective coating is cleared up easily after the completion of aluminising, and protective coating is broken into pieces can be with protection base
Body is separated, noresidue;The raw material of protective coating is neutrality, and not corrosion protection matrix will not react with high temperature protection matrix;
It will not be peeled off after protective coating aluminising, protective coating and penetration enhancer physical separation can not be polluted penetration enhancer.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
The present invention is further detailed explanation below.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention is described in detail below in conjunction with embodiment.
The invention provides a kind of aluminising protective coating, mainly formed by metallic nickel, zirconium oxide and binder making, metal
The volume ratio of nickel, zirconium oxide and binding agent is 0.7~1.3: 0.7~1.3: 2.The aluminising protective coating, raw material is common to be easy to get, valency
Lattice are cheap, and cost is low;It disclosure satisfy that aluminising temperature will for the protection in 600 DEG C~1020 DEG C of interval during pack aluminizing
Ask;Less than 900 DEG C pack aluminizings only need to 2~3 layers of coating;The aluminising protective coating clears up appearance after the completion of aluminising
Easily, protective coating is broken into pieces and can separated with protection matrix, noresidue;The raw material of protective coating is neutrality, not corrosion protection base
Body, will not react with high temperature protection matrix;It will not be peeled off after protective coating aluminising, can be by protective coating and penetration enhancer physics point
From not polluting penetration enhancer.
Metallic nickel, as element is sacrificed, can form continuous nickel powder parcel in above-mentioned raw materials in protection matrix surface
Layer, the intermetallic compound that nickel powder is stablized with the reactive aluminum in aluminising atmosphere, formation first, so as to avoid the quick endosmosis of aluminium
Enter, substantially increase protection efficiency.In above-mentioned raw materials, on the one hand zirconium oxide can play certain protective action, on the other hand
Because the particle diameter of zirconium oxide is smaller than the particle diameter of metallic nickel, scattered zirconium oxide effectively can separate metal nickel particle, prevent
Metallic nickel is sintered during pack aluminizing, reduces surface area, aluminising protection effect is influenceed, while making the coating after aluminising
Also it is more prone to remove.
It is preferred that, the volume ratio of metallic nickel, zirconium oxide and binding agent is 1: 1: 2.Each raw material can using above-mentioned volume ratio
Best protection effect is played to protection matrix.Now zirconium oxide preferably can separate metal nickel particle, to prevent metal
Nickel is sintered during aluminising, influences aluminising protection effect.
It is preferred that, binding agent is ethene lacquer.Metallic nickel, zirconium oxide are powdered.Ethene lacquer is cheap without dirt
Dye, the adhesion with metal is moderate, and carbon is decomposed to form after pack aluminizing, is easily removed, noresidue.The viscosity of ethene lacquer
Moderate, after on the one hand it is mixed with metal dust, metal dust is difficult, it is ensured that the uniformity of aluminising protective coating;Separately
On the one hand facilitate coating operation feasible, be not likely to produce bubble and pin hole.
It is preferred that, aluminising protective coating is used for when aluminising temperature is pack aluminizing in 600 DEG C~1020 DEG C intervals
Protection.Applicable aluminising temperature is wide in range, can be used for the pack aluminizing of various different materials matrixes.
Present invention also offers the preparation method of above-mentioned aluminising protective coating, comprise the following steps:By metallic nickel and oxidation
Zirconium is made as powdered, and binding agent is mixed in proportion with Zirconium oxide powder, then adds metallic nickel powder and stirs, i.e.,
It can obtain aluminising protective coating.The preparation method is simple and easy to apply efficiently, and low in raw material price, production cost is low.
It is preferred that, stirring or standing after binding agent is mixed with Zirconium oxide powder, the time of standing is 5~10h.Zirconium oxide holds
Easily reunite, binding agent needs to stand or stirred with slow mixing speed after mixing with Zirconium oxide powder, can
It is fully dispersed, to ensure the uniformity of the protective coating prepared.
The aluminising prepared present invention also offers a kind of above-mentioned aluminising protective coating or by the preparation method is prevented
Protect application of the coating in the aluminising protection of turbo blade tenon.
It is preferred that, above-mentioned application is that aluminising protective coating is coated on turbo blade tenon.The aluminising that the present invention is provided
Protective coating can be applied directly on turbo blade tenon, then dried or dried naturally, you can play a part of protection.Ooze
Aluminium process for protecting is simple, and operating method is easy efficiently.
It is preferred that, in above-mentioned application, when aluminising temperature is less than 700 DEG C, by aluminising protective coating applied in two coats;Aluminising temperature
For 700 DEG C~900 DEG C when, by aluminising protective coating coat three layers;When aluminising temperature is 900 DEG C~1020 DEG C, by the aluminising
Protective coating coats four layers.Because the material of turbo blade is different, aluminising temperature is also different.Aluminising temperature is higher, penetration enhancer
Activity also improve, aluminising speed accelerates, it is necessary to which the number of plies of the aluminising protective coating coated is also more.The aluminising of the present invention is prevented
Shield coating disclosure satisfy that aluminising temperature is the requirement of shelter in 600 DEG C~1020 DEG C of interval during pack aluminizing, Ke Yigen
According to aluminising temperature, the number of plies of suitable aluminising protective coating coating is selected.Less than 900 DEG C pack aluminizings only need to coating 2
~3 layers can reach effective protection effect.
It is preferred that, when aluminising protective coating is coated, often coating one layer needs to spontaneously dry or dries.The specific steps of coating
For:Coat and more than 6h is spontaneously dried after first layer, be coated with the second layer and spontaneously dry more than 12h, finally coat third layer simultaneously
Spontaneously dry more than 24h.0.5h or so is dried at 80 DEG C after oven for drying, coating first layer can also be used, the second layer is coated with
80 DEG C of 1~2h of drying, finally coat 80 DEG C of 2~3h of drying after third layer afterwards.Above-mentioned coating step prevents preferably aluminising
Protect paint solidification.In order to prevent aluminising protective coating to be layered and condense, stir at regular intervals once.
Embodiment
Material used is commercially available in following examples.
Embodiment 1
The preferred embodiments of the present invention provide a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binding agent ethene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethene lacquer is 1: 1
∶2。
The preparation method of above-mentioned aluminising protective coating is:Binding agent ethene lacquer and ceramic powders zirconium oxide are first pressed into volume
Than being mixed for 2: 1, place and add metallic nickel powder after 8h and stir, that is, obtain aluminising protective coating.What is prepared oozes
Aluminium protective coating is stored refrigerated after can sealing, but when causing the coating to lump because standing time is long or preserves the reason such as improper,
It cannot reuse.
Embodiment 2
The preferred embodiments of the present invention provide a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binding agent ethene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethene lacquer is 0.7
∶0.7∶2。
The preparation method of above-mentioned aluminising protective coating is:Binding agent ethene lacquer and ceramic powders zirconium oxide are first pressed into volume
Than being mixed for 2: 0.7, place and add metallic nickel powder after 8h and stir, that is, obtain aluminising protective coating.Prepare
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is long or preserving the reason such as improper causes coating to lump
When, it cannot reuse.
Embodiment 3
The preferred embodiments of the present invention provide a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binding agent ethene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethene lacquer is 0.7
∶1.3∶2。
The preparation method of above-mentioned aluminising protective coating is:Binding agent ethene lacquer and ceramic powders zirconium oxide are first pressed into volume
Than being mixed for 2: 1.3, place and add metallic nickel powder after 8h and stir, that is, obtain aluminising protective coating.Prepare
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is long or preserving the reason such as improper causes coating to lump
When, it cannot reuse.
Embodiment 4
The preferred embodiments of the present invention provide a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binding agent ethene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethene lacquer is 1.3
∶1.3∶2。
The preparation method of above-mentioned aluminising protective coating is:Binding agent ethene lacquer and ceramic powders zirconium oxide are first pressed into volume
Than being mixed for 2: 1.3, place and add metallic nickel powder after 8h and stir, that is, obtain aluminising protective coating.Prepare
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is long or preserving the reason such as improper causes coating to lump
When, it cannot reuse.
Above-mentioned aluminising protective coating turbo blade tenon aluminising protection in application be:It will be prepared in embodiment 1~4
Aluminising protective coating be applied directly to respectively on the tenon of same turbo blade.According to the suitable coating of aluminising temperature selection
The number of plies, when the aluminising temperature of selected blade material is less than 700 DEG C, by aluminising protective coating applied in two coats;Aluminising temperature is 700 DEG C
At~900 DEG C, aluminising protective coating is coated three layers;When aluminising temperature is 900 DEG C~1020 DEG C, aluminising protective coating is coated
Four layers.6h is spontaneously dried after coating first layer, the second layer is coated with and spontaneously dries 12h, third layer is finally coated and does naturally
Dry 24h, then enter stove aluminising.In order to prevent the layering and condensation of aluminising protective coating, it should stir once at regular intervals.Aluminising
After protective coating coating is completed and dried, to requiring that the aluminising protective coating of the surface i.e. excess surface of turbo blade of aluminising enters
Row finishing, the unnecessary coating of turbine blade surface is removed with blade or other instruments, it is ensured that turbine blade surface does not have coating residual
Stay, in order to which the pack aluminizing for carrying out next step is operated.
After the aluminising protective coating coating of above-described embodiment 1~4 terminates, solid powder is carried out to the turbo blade made respectively
Last aluminising, after the completion of aluminising, respectively breaks protective coating into pieces, and 4 products realize the separation with turbo blade tenon, and inspection
Coating residual is confiscated, outward appearance is good, also there is no the phenomenon corroded tenon or reacted with tenon.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the protection of the present invention.
Claims (10)
1. a kind of aluminising protective coating, it is characterised in that
Mainly formed by metallic nickel, zirconium oxide and binder making, the volume ratio of the metallic nickel, zirconium oxide and binding agent is
0.7~1.3: 0.7~1.3: 2.
2. aluminising protective coating according to claim 1, it is characterised in that
The volume ratio of the metallic nickel, zirconium oxide and binding agent is 1: 1: 2.
3. aluminising protective coating according to claim 1, it is characterised in that
The binding agent is ethene lacquer;And/or
The metallic nickel, zirconium oxide are powdered.
4. the aluminising protective coating according to any one of claims 1 to 3, it is characterised in that
The aluminising protective coating is used for protection when aluminising temperature is pack aluminizing in 600 DEG C~1020 DEG C intervals.
5. the preparation method of the aluminising protective coating described in a kind of any one of Claims 1-4, it is characterised in that including following
Step:
The metallic nickel and zirconium oxide are made as powdered, the binding agent and Zirconium oxide powder are mixed in proportion,
Then add metallic nickel powder and stir, you can obtain the aluminising protective coating.
6. the preparation method of aluminising protective coating according to claim 5, it is characterised in that
Stirring or standing after the binding agent is mixed with the Zirconium oxide powder, the time of the standing is 5~10h.
7. the preparation method system described in aluminising protective coating or claim 5 or 6 described in a kind of any one of Claims 1-4
The aluminising protective coating obtained, the application in the aluminising protection of turbo blade tenon.
8. application according to claim 7, it is characterised in that
The application is that the aluminising protective coating is coated on the turbo blade tenon.
9. application according to claim 8, it is characterised in that
In the application, when aluminising temperature is less than 700 DEG C, by the aluminising protective coating applied in two coats;Aluminising temperature is 700 DEG C
At~900 DEG C, the aluminising protective coating is coated three layers;When aluminising temperature is 900 DEG C~1020 DEG C, the aluminising is protected
Coating coats four layers.
10. application according to claim 8 or claim 9, it is characterised in that
During the aluminising protective coating coating, often coating one layer needs to spontaneously dry or dries.
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Cited By (3)
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CN109338284A (en) * | 2018-08-08 | 2019-02-15 | 沈阳梅特科航空科技有限公司 | Aluminising protective coating and its preparation method and application method |
CN110923621A (en) * | 2019-10-31 | 2020-03-27 | 中国航发南方工业有限公司 | Protective coating for aluminum-chromium co-infiltration and preparation method and application thereof |
CN112853350A (en) * | 2021-01-07 | 2021-05-28 | 成都航宇超合金技术有限公司 | Ceramic slurry for aluminizing protection and preparation method and application thereof |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109338284A (en) * | 2018-08-08 | 2019-02-15 | 沈阳梅特科航空科技有限公司 | Aluminising protective coating and its preparation method and application method |
CN109338284B (en) * | 2018-08-08 | 2020-11-17 | 沈阳梅特科航空科技有限公司 | Aluminized protective coating and preparation method and application method thereof |
CN110923621A (en) * | 2019-10-31 | 2020-03-27 | 中国航发南方工业有限公司 | Protective coating for aluminum-chromium co-infiltration and preparation method and application thereof |
CN110923621B (en) * | 2019-10-31 | 2022-01-04 | 中国航发南方工业有限公司 | Protective coating for aluminum-chromium co-infiltration and preparation method and application thereof |
CN112853350A (en) * | 2021-01-07 | 2021-05-28 | 成都航宇超合金技术有限公司 | Ceramic slurry for aluminizing protection and preparation method and application thereof |
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