CN107794528A - A kind of preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface - Google Patents
A kind of preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface Download PDFInfo
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- CN107794528A CN107794528A CN201710991016.7A CN201710991016A CN107794528A CN 107794528 A CN107794528 A CN 107794528A CN 201710991016 A CN201710991016 A CN 201710991016A CN 107794528 A CN107794528 A CN 107794528A
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Mechanical Engineering (AREA)
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- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention belongs to metallic element face coat and protection field, the preparation method of more particularly to a kind of wear-resisting antioxidant coating of high-temperature alloy surface, including step：(1) high-temperature alloy surface is handled：With sand paper polishing high-temperature alloy surface, it is cleaned by ultrasonic using acetone and removes high-temperature alloy surface greasy dirt and impurity.(2) coated powder NiCr Cr3C2, solder powder NiCr19Si10 be respectively prepared paste, or coated powder mixed in proportion with solder powder after paste is made.(3) drying after high-temperature alloy surface is positioned over after cream powder to be pressed into the flake of given size.(4) sample after drying is placed in vacuum brazing furnace and heated, after the temperature schedule of setting, taken out after cooling to room temperature with the furnace, formed it is fine and close and with the wear-resisting antioxidant coating of matrix metallurgical binding.The present invention is on the premise of non-fusible high temperature alloy matrix, and anti-wear performance and antioxygenic property significantly improve, so as to extend the service life of high temperature alloy hot-end component.
Description
Technical field
The invention belongs to metallic element face coat and protection field, more particularly to a kind of high-temperature alloy surface is wear-resisting anti-
The preparation method of oxide covering.
Background technology
High temperature alloy hot-end component is (such as：Turbine blade tip shroud damping area) frequently suffer from rubbing in harsh working environment
Abrasion and high-temperature oxydation, extend the necessary means of such part service life when applying protective coating.Due to high temperature alloy hot tearing
Line sensitiveness is very high, and according to conventional fusion welding method, uneven heat input can cause the generation of thermal stress, so as to occur to tie again
Brilliant and fire check；And during the methods of using thermal spraying, due to mechanical bond between coating and matrix, coat inside interface oxidation is tight
Weight, coating easily peel off.
The content of the invention
It is an object of the invention to provide a kind of preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface, this method can
Mass production, fine and close and coating small to high temperature alloy matrix tissue effect and the high-temperature alloy surface of matrix metallurgical binding are resistance to
Grind antioxidant coating.
The technical scheme is that：
A kind of preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface, comprises the following steps：
(1) high temperature alloy is polishing to by smooth flat using sand paper, is cleaned by ultrasonic using acetone and removes high-temperature alloy surface
Greasy dirt and impurity, and it is standby with electric-heating air blower drying；
(2) by coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2Paste is respectively prepared with solder powder NiCr19Si10
Powder；Or coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2It is made after being mixed in proportion with solder powder NiCr19Si10
Cream powder；
(3) after cream powder being pressed into the thin slice of given size, after being stacked with or being placed directly within high-temperature alloy surface
It is put into drying box and dries；
(4) sample after drying is placed in vacuum brazing furnace and heated, completed molten painting process under vacuo, cool to the furnace
Taken out after room temperature, formed it is fine and close and with the wear-resisting antioxidant coating of high temperature alloy matrix metallurgical binding.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (2), coated powder NiCr-
Cr3C2Or MCrAlY-Cr3C2For Cr3C2Particles reiforced metal-base composition, NiCr-75%Cr is respectively adopted3C2Or MCrAlY-
75%Cr3C2, M Ni, Co or NiCo.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (2), coated powder or solder powder
The granularity at end is 100~325 mesh.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (2), cream powder uses coating
Powder and solder powder add no ash content organic binder bond and mixed respectively, coated powder and solder powder respectively with without ash content
The part by weight of organic binder bond is 9:1~11:1, the part by weight of coated powder and solder powder is 3:7~4:6.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (2), coated powder and solder powder
The mixed weight ratio at end is 3:7~4:6, by mixed powder with being 9 by weight proportion without ash content organic binder bond:1~
11:Stirred after 1 mixing, form cream powder.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (3), using the mould of prescribed depth
Cream powder is pressed into required lamina dimensions by tool, and sheet thickness scope is in 0.5~5mm；The modes of emplacement of cream powder is
Superposing type is hybrid, and solder thin slice is first positioned on coated sheet by superposing type, further same to be positioned over high temperature alloy table
Face；It is hybrid, it is to be mixed into coated powder and solder powder to laminate after cream powder to be placed directly in high temperature alloy table
Face；Drying system is：60~80 DEG C of 1~3h of insulation, continue to be heated to 140~170 DEG C of 1~3h of insulation.
The preparation method of the wear-resisting antioxidant coating of described high-temperature alloy surface, in step (4), vacuum brazing furnace vacuum
1 × 10-2Below Pa, the temperature schedule of molten painting process are：250~290 DEG C are heated to from room temperature by 1~2 hour, then is passed through
After being heated within 1~3 hour 430~470 DEG C of insulations 0.5~2 hour, by being heated within 2~4 hours 1160~1230 DEG C, insulation
After 0.5~3 hour, room temperature is cooled to the furnace.
The present invention has the following advantages that compared with prior art and beneficial effect：
1. part of the present invention integrally heats, thermal stress is small, can not influence the base of high temperature alloy base material structure stability
On plinth, formed flawless and with the coating of the metallurgical binding of matrix, greatly improve the wear-resisting antioxygenic property of high temperature alloy；Carbide
Content is compared with the other method such as raising such as laser melting coating, thermal spraying by about one time.
2. the achievable multistation of the present invention, the high-volume of more parts once produce, coating layer thickness is once maximum up to 5mm,
So as to improve production efficiency.
3. the present invention is carried out in vacuum environment, pollution and the problem of oxidation of coating can be avoided, improves coating quality.
It 4. the inventive method uses paste slice-shaped powder, can not be limited, can be swashed in inner surface, groove etc. by design of part
The place that light, spraying can not reach carries out coating preparation.
Embodiment
In specific implementation process, the preparation method of wear-resisting antioxidant coating of the invention is as follows：
(1) high-temperature alloy surface is handled before preparing：High-temperature alloy surface is polished using 600~2000# sand paper
To smooth flat, after being cleaned by ultrasonic in acetone, dried up with electric-heating air blower standby.
(2) coated powder and solder powder are mixed with without ash content organic binder bond respectively, or coated powder and solder powder
End mixes with without ash content organic binder bond again after being mutually mixed, and cream powder is made.
Wherein, coated powder Cr3C2Particles reiforced metal-base composition, usually NiCr-Cr3C2Or MCrAlY-
Cr3C2, such as：NiCr-75wt%Cr is respectively adopted3C2Or MCrAlY-75wt%Cr3C2；Solder powder is nickel-based solder, its name
Composition is Ni-19Cr-10Si；Coated powder and/or solder powder and the part by weight without ash content organic binder bond are 9:1~
11:1, the part by weight of coated powder and solder powder is 3:7~4:6.
(3) thin slice of thickness needed for being pressed into cream powder in the mould of prescribed depth, 0.5~5mm of thickness range,
It is stacked with (superposing type) or directly (hybrid) is placed in high-temperature alloy surface and compressed；Part is put into drying box and dried,
Drying system is 60~80 DEG C/1~3h+140~170 DEG C/1~3h.
(4) sample after drying is positioned in vacuum brazing furnace, vacuum brazing furnace vacuum is better than 1 × 10-2Pa；Experience
After defined temperature schedule, room temperature taking-up is cooled to the furnace, formed fine and close and wear-resisting anti-with high temperature alloy matrix metallurgical binding
Oxide covering.Melting the temperature schedule applied is：250~290 DEG C are heated to from room temperature by 1~2 hour, then was added by 1~3 hour
After heat is incubated 0.5~2 hour to 430~470 DEG C, 1160~1230 DEG C were heated to 2~4 hours, after being incubated 0.5~3 hour,
Cool to room temperature with the furnace, take out part and be delivered for use after necessary processing.
Below, the present invention is further elaborated on by embodiment.
Embodiment 1：
Certain blade of aviation engine material is K438 high temperature alloys, and at 800 DEG C of operating temperature, its integral shroud damping area is frequent
Property fretting wear and high-temperature oxydation occur protected, it is necessary to apply wear-resisting antioxidant coating.By position sand paper to be fortified or
Miniature sander is degreased after being polishing to shiny surface using acetone ultrasonic cleaning and impurity, and is dried up with electric-heating air blower.Adopt
With carbide particle enhancing nickel-base alloy NiCr-75%Cr3C2As coated powder, ni-based self-fluxing alloy NiCr19Si10 makees
For solder powder, respectively with without ash content organic binder bond (such as：PMMA binding agents, i.e., using polymetylmethacrylate as base
Binding agent) mixing, mixed weight ratio is respectively 10:1, and stir and paste is respectively prepared in powder.
According to part by weight NiCr-75%Cr3C2:NiCr19Si10=4:6, cream powder is pressed into thickness respectively is
1mm and 1.5mm thin slice, by NiCr-75%Cr3C2Thin slice is placed directly within high-temperature alloy surface, and NiCr19Si10 thin slices are placed in
NiCr-75%Cr3C2On thin slice, compressed using forcing press.Sample is placed in drying box and dried, drying system is 75 DEG C/2h
+150℃/2h.Sample after drying is taken out and is put into vacuum brazing furnace, is evacuated to 8.0 × 10-3Pa, temperature schedule：From room temperature
270 DEG C were heated to by 1 hour, then after being heated to by 2 hours 450 DEG C of insulations 0.5 hour, 1180 were heated to by 3 hours
DEG C insulation 1 hour after, cool to room temperature with the furnace.
Blow-on obtains dense structure, the wear-resisting antioxidant coating with high temperature alloy matrix metallurgical binding after taking out, apply thickness
1.2mm is spent, the average HV 956 of coating hardness, nearly 1 times is improved compared with matrix.
Embodiment 2：
Certain aero-engine Low Pressure Turbine Rotor blade crown is zigzag structure, and blade crown operating temperature is more than 900
DEG C, the load born is more than 85MPa.Material is DD6 nickel-base high-temperature single crystal alloys, and its integral shroud damping area is regular to occur fine motion mill
Damage is protected, it is necessary to apply coating.By surface to be fortified be polishing to shiny surface using acetone be cleaned by ultrasonic degrease with it is miscellaneous
After matter, dried up with electric-heating air blower.By coated powder NiCr-75%Cr3C2With self-fluxing alloyed powder NiCr19Si10 by weight
Ratio 3:After 7 is well mixed, by weight 9:1 adds without ash content organic binder bond (such as：PMMA binding agents, i.e., with poly- methyl-prop
E pioic acid methyl ester PMMA is the binding agent of base) and stir paste is made in powder.
Then, cream powder is pressed into the thick thin slices of 0.7mm and applied and complex surface to be repaired.Sample is put into drying box
Middle drying, temperature schedule are：80℃/2h+200℃/1h.Sample after drying is removed and placed in vacuum brazing furnace, vacuumized
To 1.1 × 10-3Pa, temperature schedule are：280 DEG C are heated to from room temperature experience 1h, then by 3 hours to be heated to 460 DEG C of insulations 1 small
Shi Hou, be heated to by 3 hours 1210 DEG C insulation 0.5 hour after, cool to room temperature with the furnace.
Blow-on obtains dense structure, the wear-resisting antioxidant coating with single crystal super alloy matrix metallurgical binding after taking out, will
Surface Machining to given size is delivered for use.More than 50wt%, the high temperature hardness at 1000 DEG C reaches chromium carbide content in coating
To HV330, the high temperature hardness compared with DD6 single crystal super alloys improves 30%.
Embodiment result shows that the wear-resisting anti-oxidant of high temperature alloy (including single crystal super alloy) surface can be achieved in the present invention
The preparation of coating, on the premise of non-fusible high temperature alloy matrix, anti-wear performance and antioxygenic property significantly improve, so as to extend
The service life of high temperature alloy hot-end component.It is pollution-free during molten painting, it can be mass-produced, and not by parts geometry
Limitation.
Claims (7)
1. a kind of preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface, it is characterised in that comprise the following steps：
(1) high temperature alloy is polishing to by smooth flat using sand paper, is cleaned by ultrasonic using acetone and removes high-temperature alloy surface greasy dirt
And impurity, and it is standby with electric-heating air blower drying；
(2) by coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2Cream powder is respectively prepared with solder powder NiCr19Si10；
Or coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2Paste is made after being mixed in proportion with solder powder NiCr19Si10
Powder；
(3) after cream powder being pressed into the thin slice of given size, it is put into after being stacked with or being placed directly within high-temperature alloy surface
Dried in drying box；
(4) sample after drying is placed in vacuum brazing furnace and heated, completed molten painting process under vacuo, cool to room temperature with the furnace
After take out, formed it is fine and close and with the wear-resisting antioxidant coating of high temperature alloy matrix metallurgical binding.
2. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(2) in, coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2For Cr3C2Particles reiforced metal-base composition, it is respectively adopted
NiCr-75%Cr3C2Or MCrAlY-75%Cr3C2, M Ni, Co or NiCo.
3. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(2) in, the granularity of coated powder or solder powder is 100~325 mesh.
4. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(2) in, cream powder is added no ash content organic binder bond and mixed respectively using coated powder and solder powder, coated powder
It is respectively 9 with the part by weight without ash content organic binder bond with solder powder:1~11:1, the weight of coated powder and solder powder
Amount ratio is 3:7~4:6.
5. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(2) in, the mixed weight ratio of coated powder and solder powder is 3:7~4:6, by mixed powder with it is organic viscous without ash content
It is 9 by weight proportion to tie agent:1~11:Stirred after 1 mixing, form cream powder.
6. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(3) in, cream powder is pressed into using the mould of prescribed depth by required lamina dimensions, sheet thickness scope 0.5~
5mm；The modes of emplacement of cream powder is superposing type or hybrid, superposing type i.e. first by solder thin slice be positioned over coated sheet it
On, it is further same to be positioned over high-temperature alloy surface；It is hybrid, it is to be made after coated powder and solder powder are mixed into cream powder
Flakiness is placed directly in high-temperature alloy surface；Drying system is：60~80 DEG C of 1~3h of insulation, continue to be heated to 140~170
DEG C insulation 1~3h.
7. according to the preparation method of the wear-resisting antioxidant coating of high-temperature alloy surface described in claim 1, it is characterised in that step
(4) in, vacuum brazing furnace vacuum is 1 × 10-2Below Pa, the temperature schedule of molten painting process are：Pass through 1~2 hour from room temperature
250~290 DEG C are heated to, then after being heated to by 1~3 hour 430~470 DEG C of insulations 0.5~2 hour, by 2~4 hours
1160~1230 DEG C are heated to, after being incubated 0.5~3 hour, cools to room temperature with the furnace.
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Cited By (2)
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| CN109487266A (en) * | 2018-12-13 | 2019-03-19 | 郑州机械研究所有限公司 | A kind of rotary tillage cutter high-bearing capacity wear-resistant coating |
| CN111730267A (en) * | 2020-07-03 | 2020-10-02 | 贵州乾鼎科技发展有限公司 | Welding fixture and welding method for wear-resistant block of single crystal turbine blade |
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Application publication date: 20180313 |