CN104498861A - Preparation method of sealing coating with high peeling failure resistance - Google Patents
Preparation method of sealing coating with high peeling failure resistance Download PDFInfo
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- CN104498861A CN104498861A CN201410785439.XA CN201410785439A CN104498861A CN 104498861 A CN104498861 A CN 104498861A CN 201410785439 A CN201410785439 A CN 201410785439A CN 104498861 A CN104498861 A CN 104498861A
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Abstract
The invention provides a preparation method of a sealing coating with high peeling failure resistance. The preparation method comprises the following steps: carrying out structure shaping on the surface of a matrix by means of electron beam texturing or laser beam texturing, wherein the height of the structure shape is not less than 1/4 of the thickness of the coating; carrying out the thermal spraying deposition of a sealing coating material on the surface with the structure shape, of the matrix to obtain the sealing coating with high peeling failure resistance; the thermal spraying comprises the following steps: spraying by means of inclined rotary spraying, and carrying out coating deposition by means of vertical spraying after the deposition thickness of the coating achieves the height of the shape, that is, excesses the top of the shape. The preparation method provided by the invention is capable of increasing the contact area between the coating and the matrix, changing a laminated superposition structure, releasing the stress of the coating, and improving the peeling-resistant capacity of the sealing coating, thus the ingredients of the coating cannot be decomposed while the service life of the coating is prolonged.
Description
Technical field
The present invention relates to a kind of preparation method of seal coating, particularly a kind of preparation method of seal coating of high resistance spalling failure, belongs to coat preparing technology field.
Background technology
The ratio of aero-turbine outer shroud tip clearance and blade length often increases by 1%, turbine efficiency loss increases 1-3% thereupon, thermospray gas circuit seal coating is one of the important channel of improving motor efficiency and performance, reduction oil consumption, is one of manufacturing technology of aircraft engine key.
The working temperature of high-pressure turbine outer shroud seal coating is more than 1000 DEG C, also to bear supersonic speed combustion gas to wash away and the tip scraping of turbine blade of high speed rotating simultaneously, above working conditions requires that high-pressure turbine outer shroud seal coating has excellent thermal shock resistance and antioxidant property, enough bonding strengths, excellent abradability energy and anti-airflow scouring performance, and the quality of its performance directly affects the power of engine, thrust, efficiency and reliability.
The high temperature seal coating of current use, due to hot spray coating feature inherently, coating and basal body interface are combined into mechanical bond, bonding strength is lower, determine coating to work in high temperature environments and cracking easily occurs because of defects such as bonding force is weak, stress concentration and peels off, cause reliability to reduce, work-ing life shortens, and has a strong impact on engine reliability and aircraft safety.Therefore, at present in the urgent need to a kind of preparation method of new coating, antistripping, long-life protective coating of obturaging can be prepared.Therefore how to improve the bonding force of coating, final its antistripping ability of enhancing, thus extend the key that coating service life becomes problem.
In research in the past, in order to promote the antistripping inefficacy ability of coating, carrying out spraying postheat treatment to coating is a kind of effective treatment process, can promote the bonding force of coating, thus improve coating antistripping ability, extend coating service life.But in heat treatment process, coated component generating portion even all will decompose because of being heated, reduce the performance of coating.
In sum, provide a kind of promote coating antistripping inefficacy ability and the preparation method that can not reduce coating performance becomes this area problem demanding prompt solution.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of preparation method easily falling the seal coating of the high resistance spalling failure of block and spalling failure problem for traditional thermospray seal coating.
In order to achieve the above object, the invention provides a kind of preparation method of seal coating of high resistance spalling failure, in this preparation method before coating spraying deposition, electron beam roughing method or laser texturing method is utilized to carry out Mechanical Builds processing to matrix surface, specific moulding required for realization, afterwards with on the matrix of modeling structure, the mode adopting Sloped rotating spraying method to combine with vertical spraying method is carried out spray deposited to target coating.This preparation method specifically comprises the following steps:
By electron beam roughing method or laser beam roughing method, Mechanical Builds is carried out to matrix surface; Wherein, the height of described Mechanical Builds is not less than 1/4 of coat-thickness;
With the thermal spray deposition matrix surface of Mechanical Builds carrying out sealing coating material, obtain the seal coating of high resistance spalling failure;
Wherein, described thermal spray deposition comprises the following steps:
First adopt Sloped rotating spraying method to spray, deposit thickness to be coated reaches build height, after namely not having moulding top, then adopts vertical spraying method to carry out coating deposition.
According to the specific embodiment of the present invention, the spraying method that the present invention adopts is plasma spray coating process.
According to the specific embodiment of the present invention, electron beam texturing is carried out under vacuum, and laser roughening carries out under non-vacuum condition;
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the frequency of carrying out Mechanical Builds to matrix surface is 750-4500Hz.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the time of carrying out Mechanical Builds to matrix surface is 15-60s.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the electric current carrying out Mechanical Builds to matrix surface is 2-10mA.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the voltage carrying out Mechanical Builds to matrix surface is 90-150kV.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the angle in Sloped rotating spraying method between spray gun and matrix is for being greater than 45 ° and being less than 90 °, and concrete angle those skilled in the art can determine as the case may be.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, sealing coating material heats 1h-4h before using at 100 DEG C-200 DEG C; Sealing coating material selects sealing coating material conventional in this area.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the electric current of thermospray is 450-550A; Voltage is 60-75V.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the powder feed rate of thermospray is 40-80g/min.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, preferably, the flow velocity of carrier gas in thermospray is 4-7L/min.
According to the specific embodiment of the present invention, the main gas of thermospray is 35-45L/min, and the assisted gas of thermospray is 5.0-7.0L/min.
The preparation method of the seal coating of high resistance spalling failure provided by the invention, specifically comprises the following steps:
First, with dehydrated alcohol or acetone, matrix is cleaned, remove the impurity such as the greasy dirt of matrix surface, rusty stain or dust;
Then, carry out Mechanical Builds by electron beam texturing or laser beam texturing technique to the matrix surface cleaned up, modeling structure yardstick generates the moulding of software control generating structure by waveform after determining;
According to different spray material and matrix, the Service Environment condition of integration objective coating, design concrete texturing modeling structure, size, density and distribution pattern, because different molding surfaces, size and density distribution etc. all can be sprawled the deposition of succeeding target coating, coating structure compactness, between coating and matrix and interfacial bonding strength etc. play decisive role, modeling structure parameter is determined according to following condition:
The first, the factors such as the scantlings of the structure of surface texturing moulding forms according to the raw material of sealing coating material, the Service Environment of coat-thickness, coating determine.In spray deposition process, according to different sealing coating materials, matrix and different surfaces modeling structure, select different deposition process parameters and angle;
Second, size according to protruding with recessed is determined, recessed features improves the mechanical interlocked of same interconnecting piece, and prominent feature contributes to the stress relief of joint interface, and protrudes mainly relevant with body material, the material of target coating and final thickness with recessed size;
Finally, with the thermal spray deposition matrix surface of Mechanical Builds carrying out sealing coating material, the seal coating of high resistance spalling failure is obtained;
In coating deposition process, first to take Sloped rotating spraying method, namely between spray gun and matrix at an angle, matrix fixed by frock and arranges specific rotating speed and carry out rotary spraying.Because after matrix surface processes modeling structure, if still by the spraying of traditional vertical mode, can there is spraying shielding effect because of the stop of modeling structure, and produce more great hole, cause coating texture uneven, stability is poor; Deposit thickness to be coated reaches build height, after namely not having moulding top, adopts vertical spraying method to carry out coating deposition.
In the preparation method of the seal coating of high resistance spalling failure provided by the invention, contact area between coating and matrix and interlocking power is added by carrying out Mechanical Builds to matrix surface, change stratiform overlaying structure, thus the crack growth mechanism that can change on coatingsurface, guide and release coat stress, enhance coating shearing resistance.Effectively can stop coating, under the effect being subject to shearing friction power, spalling failure occurs, promote coating performance, extend coating service life.
The preparation method of the seal coating of high resistance spalling failure provided by the invention, first Mechanical Builds is carried out by electron beam texturing technique or laser roughening technique at matrix surface, utilize hot-spraying techniques to deposit seal coating afterwards on moulding surface, improve the contact area between coating and matrix, change stratiform overlaying structure, release coat stress, promote the antistripping ability of seal coating, make that coating service life obtains very large prolongation and composition can not produce decomposition.
Accompanying drawing explanation
Fig. 1 is structural representation matrix being carried out to texturing moulding in embodiment 1;
Fig. 2 is the coating in embodiment 1 and the shape appearance figure between matrix texturing interface.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of preparation method of seal coating of high resistance spalling failure, this preparation method comprises the following steps:
Utilize dehydrated alcohol or acetone to clean matrix to be sprayed, dry;
Sealing coating material powder is put into process furnace and be heated to 100 DEG C of insulations 1 hour, wherein, the raw material composition of the sealing coating material of employing comprises: Co
24ni
16cr
6al
0.3y
7bN
14polyester, particle diameter is 176 ± 7.8 μm;
The matrix cleaned up is placed in the vacuum tank of texturing equipment, setting texturing parameter, unlocking electronic Shu Maohua equipment, vacuumize, carry out the processing of matrix surface Mechanical Builds, its structural representation as shown in Figure 1, after program to be processed is run, close electron beam texturing equipment, open vacuum tank, take out the matrix that texturing is good; Wherein, concrete texturing parameter (determining adding design parameter when man-hour texturing thorn reaches required yardstick according to matrix): waveform is Com-ajmd, frequency is 1500Hz, line is electronic beam current, the time is 60S, electric current is 2mA-10mA, voltage is 90kV;
Shape after texturing generates software by waveform and carries out after Waveform Design by Software Create;
Coating material powder is put into spraying powder feeder, open water coolant, cooling air etc., open powder feeder, open spraying equipment, the deposition of target coating is carried out: first sprayed by Sloped rotating plasma spraying method (in 70 ° between spray gun and matrix) at the matrix surface with modeling structure, to be coated covered whole modeling structure after, vertical plasma spraying method is adopted to carry out coating deposition again, to be sprayed to target thickness, close powder feeder, close spraying equipment, close water coolant, cooling air, wherein, the parameter of plasma spraying is electric current 500A, voltage 70V, main gas 40L/min, assisted gas 6.0L/min, powder feed rate 40g/min, flow rate of carrier gas 5L/min, obtain the seal coating of high resistance spalling failure, pattern between coating and matrix texturing interface as shown in Figure 2.
Carried out correlated performance test to the seal coating of high resistance spalling failure prepared by the present embodiment, test result is as shown in table 1.
Table 1
As shown in Table 1, the preparation method of the seal coating of high resistance spalling failure provided by the invention can ensure that the coating prepared has good wear resistance, coating porosity and microhardness are all controlled in one preferably scope, are adjusted by their abradability of cooperation to coating.And matrix surface modeling structure changes coating stratiform overlaying structure, in addition for the anchoring locking force of coating, its 1100 DEG C of thermal shock resistances are made to bring up to 500 circulations above (traditional between 150-200 cycle), effectively improve the antistripping ability of coating, extend service life.
Claims (10)
1. a preparation method for the seal coating of high resistance spalling failure, this preparation method comprises the following steps:
By electron beam roughing method or laser beam roughing method, Mechanical Builds is carried out to matrix surface; Wherein, the height of described Mechanical Builds is not less than 1/4 of coat-thickness;
With the thermal spray deposition matrix surface of Mechanical Builds carrying out sealing coating material, obtain the seal coating of high resistance spalling failure;
Wherein, described thermal spray deposition comprises the following steps:
First adopt Sloped rotating spraying method to spray, deposit thickness to be coated reaches build height, then adopts vertical spraying method to carry out coating deposition.
2. preparation method according to claim 1, wherein, described frequency of carrying out Mechanical Builds to matrix surface is 750-4500Hz.
3. preparation method according to claim 1, wherein, the described time of carrying out Mechanical Builds to matrix surface is 15-60s.
4. preparation method according to claim 1, wherein, the described electric current carrying out Mechanical Builds to matrix surface is 2-10mA.
5. preparation method according to claim 1, wherein, the described voltage carrying out Mechanical Builds to matrix surface is 90-150kV.
6. preparation method according to claim 1, wherein, the angle in described Sloped rotating spraying method between spray gun and matrix is greater than 45 ° and is less than 90 °.
7. preparation method according to claim 1, wherein, described sealing coating material heats 1h-4h before using at 100 DEG C-200 DEG C.
8. preparation method according to claim 1, wherein, the electric current of described thermospray is 450-550A; Voltage is 60-75V.
9. preparation method according to claim 1, wherein, the powder feed rate of described thermospray is 40-80g/min.
10. preparation method according to claim 1, wherein, the flow velocity of carrier gas in described thermospray is 4-7L/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385976A (en) * | 2015-11-30 | 2016-03-09 | 中国人民解放军装甲兵工程学院 | Preparation method for sealing coating of machine part |
| CN106676449A (en) * | 2015-11-04 | 2017-05-17 | 中国人民解放军装甲兵工程学院 | Method for improving bonding strength of coating |
| CN110592517A (en) * | 2019-10-24 | 2019-12-20 | 中国科学院工程热物理研究所 | Manufacturing method of high-temperature sealing coating structure |
| CN114774826A (en) * | 2022-04-20 | 2022-07-22 | 西安热工研究院有限公司 | Environment barrier coating for preventing and treating overtemperature of boiler and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572191A (en) * | 2013-11-05 | 2014-02-12 | 中国航空工业集团公司北京航空材料研究院 | Four-phase ceramic matrix high-temperature wearable sealing coating |
| CN103774080A (en) * | 2014-02-21 | 2014-05-07 | 北京矿冶研究总院 | Aluminum-silicon-boron nitride sealing composite powder material, coating and preparation method |
-
2014
- 2014-12-17 CN CN201410785439.XA patent/CN104498861B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572191A (en) * | 2013-11-05 | 2014-02-12 | 中国航空工业集团公司北京航空材料研究院 | Four-phase ceramic matrix high-temperature wearable sealing coating |
| CN103774080A (en) * | 2014-02-21 | 2014-05-07 | 北京矿冶研究总院 | Aluminum-silicon-boron nitride sealing composite powder material, coating and preparation method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676449A (en) * | 2015-11-04 | 2017-05-17 | 中国人民解放军装甲兵工程学院 | Method for improving bonding strength of coating |
| CN105385976A (en) * | 2015-11-30 | 2016-03-09 | 中国人民解放军装甲兵工程学院 | Preparation method for sealing coating of machine part |
| CN110592517A (en) * | 2019-10-24 | 2019-12-20 | 中国科学院工程热物理研究所 | Manufacturing method of high-temperature sealing coating structure |
| CN114774826A (en) * | 2022-04-20 | 2022-07-22 | 西安热工研究院有限公司 | Environment barrier coating for preventing and treating overtemperature of boiler and preparation method thereof |
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Address after: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee after: China Institute of Aeronautical Manufacturing Technology Address before: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee before: Beijing Aviation Manufacturing Engineering Institute of China Aviation Industry Group Company |
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