CN107267912B - 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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- CN107267912B CN107267912B CN201710514101.4A CN201710514101A CN107267912B CN 107267912 B CN107267912 B CN 107267912B CN 201710514101 A CN201710514101 A CN 201710514101A CN 107267912 B CN107267912 B CN 107267912B
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- aluminising
- protective coating
- zirconium oxide
- binder
- 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, which is mainly formed by metallic nickel, zirconium oxide and binder making, and the volume ratio of metallic nickel, zirconium oxide and binder is 0.7~1.3: 0.7~1.3: 2.The aluminising protective coating, raw material is common to be easy to get, cheap, at low cost；900 DEG C or less pack aluminizings only need to coat 2~3 layers；It can satisfy requirement of shelter of the aluminising temperature in 600 DEG C~1020 DEG C of section when pack aluminizing；The aluminising protective coating is cleared up after the completion of aluminising to be easy, 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 be peeled off automatically 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 fields, particularly, are related to a kind of aluminising protective coating.In addition, the present invention also relates to
And a kind of preparation method and application of above-mentioned aluminising protective coating.
Background technique
It is also higher and higher to the temperature requirement of gas turbine operation with modern Aviation industrial expansion.To meet combustion gas
Use demand under turbine high temperature, high revolving speed, strong corrosive environment, gas-turbine blade take aluminising to handle extensively.By aluminising
The piece surface of processing forms the Al of even compact after high temperature air cyclic oxidation2O3Oxidation film, can effectively prevent oxygen to
Matrix diffusion.
Pack aluminizing is that a kind of part is embedded in powdered aluminizing medium heats diffusion, is formed and is seeped in piece surface
The method of aluminium layer, pack aluminizing can form high quality and uniform aluminized coating, and solid powder on part with complex appearance
Alumetizing process is simple, at low cost, is widely used by major Aviation Manufacturing Enterprises.
However the tenon of gas-turbine blade is subject to high stress position, notch sensitive can be brought after tenon tooth aluminising, is easy
It cracks, therefore tenon position is unable to aluminising, aluminising needs to protect tenon position when handling blade.If protected using surplus
Method, then carry out tenon processing in the aluminising of blade blank state, blade infiltration layer is easy to damage, and qualification rate is low, therefore state
The method of aluminising after first processing tenon is generallyd use on border.
Qualified tenon means of defence has to meet several conditions: 1, aluminising protection is effective；2, it is easy cleaning, it cannot
In tenon remained on surface protective materials；3, the basis material of tenon cannot be polluted；4, aluminizing medium cannot be polluted.
Currently, the method for the tenon protection of gas-turbine blade mainly has: 1, using ceramics powder when pack aluminizing
End is configured to slurry, is protected coated in tenon position.This method facilitate it is feasible, must but to reach effective anti-seepage effect
It must ten multilayers of coating.2, it is 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, part size tolerance, thermal stress the problems such as, leakproofness is very
It is difficult to guarantee；And protective case volume is larger, influences batch and practical shove charge operation when aluminising.
Summary of the invention
It is non-when solving pack aluminizing the present invention provides a kind of aluminising protective coating and its preparation method and application
Aluminising position needs the technical issues of protecting.
The technical solution adopted by the 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 binder is 0.7~1.3: 0.7~1.3: 2.
Further, the volume ratio of metallic nickel, zirconium oxide and binder is 1: 1: 2.
Further, binder is ethylene lacquer；And/or metallic nickel, zirconium oxide are powdered.
Further, when aluminising protective coating for aluminising temperature is pack aluminizing in 600 DEG C~1020 DEG C sections
Protection.
According to another aspect of the present invention, a kind of preparation method of above-mentioned aluminising protective coating is additionally provided, including following
Step: metallic nickel being made as with zirconium oxide powdered, and binder and Zirconium oxide powder are mixed in proportion, are then added
Metallic nickel powder simultaneously stirs, and the aluminising protective coating can be obtained.
Further, it stirs or stands after binder 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 above-mentioned aluminising protective coating is additionally provided in the aluminising of turbo blade tenon
Application in protection.
Further, using for by aluminising protective coating be coated in turbo blade tenon on.
Further, in, when aluminising temperature is lower 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 is applied
Four layers of material coating.
Further, when aluminising protective coating coats, every one layer of needs of coating spontaneously dry or drying.
The invention has the following advantages:
Aluminising protective coating provided by the invention, raw material is common to be easy to get, cheap, at low cost；It can satisfy aluminising temperature
Degree is the requirement of shelter in 600 DEG C~1020 DEG C of section when pack aluminizing；900 DEG C or less pack aluminizings only need
2~3 layers of coating；The aluminising protective coating is cleared up after the completion of aluminising to be easy, and protective coating is broken into pieces can be with protection base
Body separation, 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.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
The present invention is further detailed explanation below.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
The present invention provides a kind of aluminising protective coatings, are mainly formed by metallic nickel, zirconium oxide and binder making, metal
The volume ratio of nickel, zirconium oxide and binder is 0.7~1.3: 0.7~1.3: 2.The aluminising protective coating, raw material is common to be easy to get, valence
Lattice are cheap, at low cost；Protection when can satisfy pack aluminizing in the section that aluminising temperature is 600 DEG C~1020 DEG C is wanted
It asks；900 DEG C or less pack aluminizings only need to coat 2~3 layers；The aluminising protective coating clears up appearance after the completion of aluminising
Easily, protective coating being broken into pieces can separate 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, it 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 package in protection matrix surface in above-mentioned raw materials
Layer, nickel powder with the reactive aluminum in aluminising atmosphere, forms stable intermetallic compound first, to avoid the quick endosmosis of aluminium
Enter, substantially increases protection efficiency.In above-mentioned raw materials, on the one hand zirconium oxide can play certain protective action, on the other hand
Since the partial size of zirconium oxide is smaller than the partial size of metallic nickel, the zirconium oxide of dispersion can effectively be separated metal nickel particle, be prevented
Metallic nickel is sintered during pack aluminizing, is reduced surface area, is influenced aluminising protection effect, while making the coating after aluminising
Also it is more easier to remove.
Preferably, the volume ratio of metallic nickel, zirconium oxide and binder is 1: 1: 2.Each raw material can using above-mentioned volume ratio
Best protection effect is played to protection matrix.Zirconium oxide can preferably separate metal nickel particle at this time, to prevent metal
Nickel is sintered during aluminising, influences aluminising protection effect.
Preferably, binder is ethylene lacquer.Metallic nickel, zirconium oxide are powdered.The cheap no dirt of ethylene lacquer
Dye, it is moderate with the binding force of metal, it is decomposed to form carbon after pack aluminizing, easily removes, noresidue.The viscosity of ethylene lacquer
Moderate, after on the one hand it is mixed with metal powder, metal powder is not easy, and ensure 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.
Preferably, aluminising protective coating is used for when aluminising temperature is pack aluminizing in 600 DEG C~1020 DEG C sections
Protection.Applicable aluminising temperature is wide in range, can be used for the pack aluminizing of various different materials matrixes.
The present invention also provides the preparation methods of above-mentioned aluminising protective coating, comprising the following steps: by metallic nickel and oxidation
Zirconium is made as powdered, and binder and Zirconium oxide powder are mixed in proportion, and metallic nickel powder is then added and stirs, i.e.,
Aluminising protective coating can be obtained.Preparation method is simple for this efficiently, low in raw material price, and production cost is low.
Preferably, it stirs or stands after binder is mixed with Zirconium oxide powder, the time of standing is 5~10h.Zirconium oxide holds
Easy to reunite, binder needs to stand or stirred with slow mixing speed after mixing with Zirconium oxide powder, can
It is fully dispersed, to guarantee the uniformity of the protective coating of preparation.
Prevent the present invention also provides a kind of above-mentioned aluminising protective coating or by the aluminising that the preparation method is prepared
Protect application of the coating in the aluminising protection of turbo blade tenon.
Preferably, above-mentioned application is that aluminising protective coating is coated on turbo blade tenon.Aluminising provided by the invention
Protective coating can be applied directly on turbo blade tenon, then naturally dry or drying, can play the role of protection.It seeps
Aluminium process for protecting is simple, and operating method is easy efficiently.
Preferably, in above-mentioned application, when aluminising temperature is lower than 700 DEG C, by aluminising protective coating applied in two coats；Aluminising temperature
When being 700 DEG C~900 DEG C, aluminising protective coating is coated three layers；When aluminising temperature is 900 DEG C~1020 DEG C, by the aluminising
Protective coating coats four layers.Since the material of turbo blade is different, aluminising temperature is also different.Aluminising temperature is higher, penetration enhancer
Activity also improve, aluminising speed becomes faster, and the number of plies for the aluminising protective coating for needing to coat is also more.Aluminising of the invention is anti-
Shield coating can satisfy requirement of shelter when pack aluminizing in the section that aluminising temperature is 600 DEG C~1020 DEG C, Ke Yigen
According to aluminising temperature, the number of plies of suitable aluminising protective coating coating is selected.900 DEG C or less pack aluminizings only need to coat 2
~3 layers can reach effective protection effect.
Preferably, when aluminising protective coating coats, every one layer of needs of coating spontaneously dry or drying.The specific steps of coating
Are as follows: 6h or more is spontaneously dried after coating first layer, the second layer is coated with and spontaneously dries 12h or more, finally coat third layer simultaneously
It spontaneously dries more than for 24 hours.It can also be dried with baking oven, in 80 DEG C of drying 0.5h or so after coating first layer, be coated with the second layer
80 DEG C of 1~2h of drying afterwards finally coat 80 DEG C of 2~3h of drying after third layer.Above-mentioned coating step can preferably make aluminising anti-
Protect paint solidification.The layering of aluminising protective coating and condensation in order to prevent, stirring is primary at regular intervals.
Embodiment
Material used is commercially available in following embodiment.
Embodiment 1
The preferred embodiment of the present invention provides a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binder ethylene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethylene lacquer is 1: 1
∶2。
Above-mentioned aluminising protective coating the preparation method comprises the following steps: binder ethylene lacquer and ceramic powders zirconium oxide are first pressed volume
Than mixing, adding metallic nickel powder after placing 8h and being stirred evenly to get aluminising protective coating is arrived for 2: 1.Prepared infiltration
Aluminium protective coating is stored refrigerated after can sealing, but when causing coating to agglomerate because standing time is too long or saves the reasons such as improper,
It cannot reuse.
Embodiment 2
The preferred embodiment of the present invention provides a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binder ethylene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethylene lacquer is 0.7
∶0.7∶2。
Above-mentioned aluminising protective coating the preparation method comprises the following steps: binder ethylene lacquer and ceramic powders zirconium oxide are first pressed volume
Than mixing, adding metallic nickel powder after placing 8h and being stirred evenly to get aluminising protective coating is arrived for 2: 0.7.It is prepared
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is too long or saving the reasons such as improper causes coating to agglomerate
When, it cannot reuse.
Embodiment 3
The preferred embodiment of the present invention provides a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binder ethylene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethylene lacquer is 0.7
∶1.3∶2。
Above-mentioned aluminising protective coating the preparation method comprises the following steps: binder ethylene lacquer and ceramic powders zirconium oxide are first pressed volume
Than mixing, adding metallic nickel powder after placing 8h and being stirred evenly to get aluminising protective coating is arrived for 2: 1.3.It is prepared
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is too long or saving the reasons such as improper causes coating to agglomerate
When, it cannot reuse.
Embodiment 4
The preferred embodiment of the present invention provides a kind of aluminising protective coating, mainly by metallic nickel powder, ceramic powders oxygen
Change zirconium and binder ethylene lacquer is formulated, the volume ratio of metallic nickel powder, ceramic powders zirconium oxide and ethylene lacquer is 1.3
∶1.3∶2。
Above-mentioned aluminising protective coating the preparation method comprises the following steps: binder ethylene lacquer and ceramic powders zirconium oxide are first pressed volume
Than mixing, adding metallic nickel powder after placing 8h and being stirred evenly to get aluminising protective coating is arrived for 2: 1.3.It is prepared
Aluminising protective coating is stored refrigerated after can sealing, but because standing time is too long or saving the reasons such as improper causes coating to agglomerate
When, it cannot reuse.
Application of the above-mentioned aluminising protective coating in the aluminising protection of turbo blade tenon are as follows: will be prepared in Examples 1 to 4
Aluminising protective coating be applied directly on the tenon of same turbo blade respectively.Suitable coating is selected according to aluminising temperature
The number of plies, when the aluminising temperature of selected blade material is lower 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, be coated with the second layer and spontaneously dries 12h, finally coat third layer and is done naturally
It is dry for 24 hours, then into furnace aluminising.The layering and condensation of aluminising protective coating in order to prevent should stir primary at regular intervals.Aluminising
Protective coating coating is completed and after drying, to the aluminising protective coating of the surface i.e. excess surface of turbo blade for requiring aluminising into
Row finishing, with blade or the extra coating of other tools removal turbine blade surface, it is ensured that turbine blade surface does not have coating residual
It stays, in order to carry out the pack aluminizing operation of next step.
After the aluminising protective coating coating of above-described embodiment 1~4, solid powder is carried out to the turbo blade made respectively
Last aluminising after the completion of aluminising, is respectively broken protective coating into pieces, and 4 products realize the separation with turbo blade tenon, and examine
Coating residual is confiscated, appearance is good, does not also have the phenomenon that corroding tenon or reacting with tenon.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included in protection of the invention.
Claims (10)
1. a kind of aluminising protective coating, which is characterized in that
It is mainly formed by metallic nickel, zirconium oxide and binder making, the volume ratio of the metallic nickel, zirconium oxide and binder is
0.7~1.3: 0.7~1.3: 2.
2. aluminising protective coating according to claim 1, which is characterized in that
The volume ratio of the metallic nickel, zirconium oxide and binder is 1: 1: 2.
3. aluminising protective coating according to claim 1, which is characterized in that
The binder is ethylene lacquer；And/or
The metallic nickel, zirconium oxide are powdered.
4. aluminising protective coating according to any one of claims 1 to 3, which is characterized in that
The aluminising protective coating is the protection in 600 DEG C~1020 DEG C sections when pack aluminizing for aluminising temperature.
5. a kind of preparation method of the described in any item aluminising protective coatings of Claims 1-4, which is characterized in that including following
Step:
The metallic nickel is made as with zirconium oxide powdered, the binder is mixed in proportion with Zirconium oxide powder,
Then metallic nickel powder is added and stirs, the aluminising protective coating can be obtained.
6. the preparation method of aluminising protective coating according to claim 5, which is characterized in that
The binder is stirred or is stood after mixing with the Zirconium oxide powder, and the time of the standing is 5~10h.
7. a kind of described in any item aluminising protective coatings of Claims 1-4 or preparation method system described in claim 5 or 6
The aluminising protective coating obtained, the application in the aluminising protection of turbo blade tenon.
8. application according to claim 7, which is characterized in that
The application is that the aluminising protective coating is coated on the turbo blade tenon.
9. application according to claim 8, which is characterized in that
In the application, when aluminising temperature is lower 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, which is characterized in that
When the aluminising protective coating coats, every one layer of needs of coating spontaneously dry or drying.
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| CN201710514101.4A CN107267912B (en) | 2017-06-28 | 2017-06-28 | Aluminising protective coating and its preparation method and application |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN115679248A (en) * | 2022-06-09 | 2023-02-03 | 彭州航大新材料有限公司 | Seepage-proof aluminum paste, seepage-proof aluminum coating and preparation method thereof |
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| CN103484816A (en) * | 2012-06-13 | 2014-01-01 | 常州兰翔机械有限责任公司 | Calorizing impregnation agent for K4648 alloy and preparation method thereof, and calorizing method |
| CN103589992A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Aluminized silicon slurry and method for preparing aluminum-silicon permeated layer on surface of turbine blade |
| CN106637068A (en) * | 2016-12-20 | 2017-05-10 | 四川成发航空科技股份有限公司 | Anti-percolator for tenons of guide blades of aeronautic engine |
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| CN103484816A (en) * | 2012-06-13 | 2014-01-01 | 常州兰翔机械有限责任公司 | Calorizing impregnation agent for K4648 alloy and preparation method thereof, and calorizing method |
| CN103589992A (en) * | 2013-11-15 | 2014-02-19 | 西安航空动力股份有限公司 | Aluminized silicon slurry and method for preparing aluminum-silicon permeated layer on surface of turbine blade |
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