CN107716933A - A kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy - Google Patents
A kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy Download PDFInfo
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- CN107716933A CN107716933A CN201710990759.2A CN201710990759A CN107716933A CN 107716933 A CN107716933 A CN 107716933A CN 201710990759 A CN201710990759 A CN 201710990759A CN 107716933 A CN107716933 A CN 107716933A
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- 239000013078 crystal Substances 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 49
- 238000000576 coating method Methods 0.000 title claims abstract description 49
- 229910000601 superalloy Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003963 antioxidant agent Substances 0.000 title claims abstract description 34
- 230000003078 antioxidant effect Effects 0.000 title claims abstract description 34
- 238000000746 purification Methods 0.000 title claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 80
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 25
- 239000006071 cream Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000011812 mixed powder Substances 0.000 claims abstract description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 238000005219 brazing Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000000498 ball milling Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000005485 electric heating Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910003266 NiCo Inorganic materials 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 abstract 1
- 229910001120 nichrome Inorganic materials 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 6
- 229910021332 silicide Inorganic materials 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 244000137852 Petrea volubilis Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 208000025599 Heat Stress disease Diseases 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910019878 Cr3Si Inorganic materials 0.000 description 1
- 229910003217 Ni3Si Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
-
- B22F1/0003—
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
- B22F2007/042—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method
Abstract
The invention belongs to metallic element face coat and protection field, more particularly to a kind of interface purification method of single crystal super alloy surface abrasion resistance antioxidant coating, including step：(1) single crystal super alloy parts position to be fortified is successively polishing to shiny surface, eliminates deformation layer and residual stress, be cleaned by ultrasonic using acetone and degreased and impurity；(2) by coated powder NiCr Cr3C2Or MCrAlY Cr3C2, nickel base self-fluxing alloy powder and pure Cr powder be well mixed according to being put into ball mill；(3) mixed powder is formed into cream powder with being stirred after being mixed without ash content organic binder bond；(4) single crystal super alloy parts surface to be fortified is positioned over after cream powder being suppressed into flakiness, is then placed in drying box and dries；(5) parts after drying are put into vacuum brazing furnace, complete pricker under vacuo and apply process, taken out after cooling to room temperature with the furnace, obtain metallurgical binding and the wear-resisting antioxidant coating of interface purification.
Description
Technical field
The invention belongs to metallic element face coat and protection field, more particularly to a kind of single crystal super alloy real surface
Molten apply of sky prepares NiCr-Cr3C2The interface purification method of wear-resisting antioxidant coating.
Background technology
Single crystal super alloy hot-end component frequently suffers from fretting wear and high-temperature oxydation, and it is wear-resisting to be typically employed in surface application
Antioxidant coating is protected.Vacuum pricker applies and can prepare the fine and close of metallurgical binding in the case of non-fusible matrix and wear-resisting resist
Oxide covering, therefore have huge potentiality in single crystal super alloy field.But in the solder composition during the painting of vacuum pricker
The melting point depressants such as Si, B would generally be added to reduce the fusing point of solder, these elements can be formed at the interface of coating and matrix
Ni3The firmly crisp phase of the borides such as the silicides such as Si, CrB, the peeling easy to crack for causing coating under thermal cycle conditions.It is in addition, wear-resisting
Carbide reinforced meet in antioxidant coating is spread during pricker painting to single crystal substrate, with the carbide shape in single crystal substrate
Carbide is combined to form into element, so as to destroy the structure stability of monocrystalline.
The content of the invention
It is an object of the invention to provide a kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy, the party
Method may be implemented in single crystal substrate surface and prepare the wear-resisting antioxidant coating of metallurgical binding, and single crystal substrate tissue keeps stable, coating with
Basal body interface greatly improves without brittlement phase and the performance such as γ ' phase morphology energy continuous transitions, the heat fatigue of coating.
The technical scheme is that：
A kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy, it is characterised in that comprise the following steps：
(1) single crystal super alloy parts position to be fortified is successively polishing to shiny surface, eliminates deformation layer and remnants should
Power, it is cleaned by ultrasonic using acetone and is degreased with after impurity, dried up with electric-heating air blower standby；
(2) by coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2, nickel base self-fluxing alloy powder and pure Cr powder be put into ball
It is well mixed in grinding machine；
(3) mixed powder is formed into cream powder with being stirred after being mixed without ash content organic binder bond；
(4) single crystal super alloy parts surface to be fortified is positioned over after cream powder being suppressed into flakiness, is then placed in
Dried in drying box；
(5) parts after drying are put into vacuum brazing furnace, complete pricker under vacuo and apply process, cool to room with the furnace
Taken out after temperature, obtain metallurgical binding and the wear-resisting antioxidant coating of interface purification.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (2), coated powder
NiCr-Cr3C2Or MCrAlY-Cr3C2Cr3C2For Cr3C2Particles reiforced metal-base composition, NiCr-75% is respectively adopted
Cr3C2Or MCrAlY-75%Cr3C2, M Ni, Co or NiCo.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (2), the addition of pure Cr powder
Ratio is the mixed-powder and nickel base self-fluxing alloy powder of the 30%~50% of coated powder weight, coated powder and pure Cr powder
Weight ratio is 4:6~5:5.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (2), coated powder, nickel
The granularity of base self-fluxing alloyed powder or pure Cr powder is 50~150 μm.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (2), ball mill parameter
For：200~400r/min of rotating speed, Ball-milling Time are 1~4 hour, ball material mass ratio 6:1~12:1.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (3), mixed powder
It is 6 with the weight ratio without ash content organic adhesive:1~8:1.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (4), cream powder is through mould
Tool is pressed into 0.1~0.5mm of thickness thin slice, is placed in single crystal super alloy surface using hybrid method, i.e., by ball milling mixing
After cream powder be made and suppresses flakiness be placed directly in single crystal super alloy surface；Drying system is 80~100 DEG C of insulations 1
~3h, continue to be heated to 170~200 DEG C of 1~3h of insulation.
The interface purification method of the wear-resisting antioxidant coating of described single crystal super alloy, in step (5), vacuum brazing furnace is true
Reciprocal of duty cycle is 3 × 10-3Below Pa, the temperature schedule that pricker applies process are：220~270 are heated to from room temperature by 0.5~1.5 hour
DEG C, then after being heated to by 1~2 hour 450~490 DEG C of insulations 0.5~1 hour, by be heated within 1~3 hour 1200~
1260 DEG C, after being incubated 0.5~1 hour, cool to room temperature with the furnace.
The present invention design philosophy be：
NiCr-Cr is prepared on single crystal super alloy surface using the method that vacuum pricker applies3C2Wear-resisting antioxidant coating, solder
Using BNi-5 (NiCr19Si10), Si adds as melting point depressant, and it is with Cr, Ni etc. react, and in interface, generation is largely hard
Crisp phase Cr3Si、Ni3Si, single crystal substrate tissue unstability, substantial amounts of MC types carbide is separated out, substantial amounts of carbide former is such as
Ta, Ti, W, Mo etc. spread to coating, accumulate to form MC type carbide in interface.Found through overtesting, by coated powder
NiCr-Cr3C2The pure Cr powder of middle addition 30%~50%, can consume Si on interface, C element, reduce coating/basal body interface
Hard crisp phase amount, so as to reach the effect at purification interface.
The present invention has advantages below and beneficial effect compared with prior art：
1. present invention can be implemented in single crystal super alloy component surface to prepare wear-resisting antioxidant coating, single crystal substrate is kept
Structure stability, so as to keep elevated temperature strength.
2. the present invention improves the binding ability at coating and single crystal substrate interface, decrease or even eliminate separated out on interface it is harmful
Hard crisp phase, lifts antistrip performance.
3. for γ ' phase morphologies along single crystal substrate to coating continuous transition, the heat resistanceheat resistant for improving coating is tired in Interface Microstructure of the present invention
Labor ability.
Brief description of the drawings
Fig. 1-Fig. 2 is single crystal super alloy interface clean-up effect metallograph.Wherein, Fig. 1 is not add Cr powder (left figure)；Fig. 2
It is addition 30wt%Cr powder (right figure).
Embodiment
In specific implementation process, single crystal super alloy surface abrasion resistance antioxidant coating interface purification method of the invention is such as
Under：
(1) pretreatment on single crystal super alloy surface to be fortified：Successively surface is beaten using miniature sander combination sand paper
Shiny surface is milled to, deformation layer and residual stress is removed, is cleaned by ultrasonic in acetone to degrease with after impurity, uses electrothermal blowing
Machine drying is standby.
(2) by coated powder NiCr-75wt%Cr3C2(or MCrAlY-75wt%Cr3C2), nickel base self-fluxing alloy powder
It is put into ball mill and is well mixed according to certain proportioning with pure Cr powder；Ratio range：Pure Cr powder accounts for coated powder weight
30%~50%, the mixed-powder and nickel base self-fluxing alloy powder weight ratio of coated powder and pure Cr powder are 4:6~5:5；Powder
Last granularity is 50~150 μm；Ball mill parameter is：200~400r/min of rotating speed, Ball-milling Time are 1~4 hour, ball material matter
Measure ratio 6:1~12:1.
(3) by mixed powder with without ash content organic binder bond proportionally 6:1~8:Stirred after 1 mixing, shape
Into cream powder；
(4) cream powder is pressed into after the thin slice that size is 0.1~0.5mm and monocrystalline high temperature is placed in using hybrid method
Alloy surface, i.e., will be made cream powder and suppress flakiness and be placed directly in single crystal super alloy surface after ball milling mixing；Dry
Dry temperature schedule is 80~100 DEG C/1~3h+170~200 DEG C/1~3h.
(5) parts after drying are put into vacuum brazing furnace, better than 3 × 10-3According to set under Pa vacuum
Temperature schedule complete pricker and apply process, taken out after cooling to room temperature with the furnace, the wear-resisting anti-of metallurgical binding and interface purification can be obtained
Oxide covering, it is delivered for use after necessary processing.Temperature schedule is：220 are heated to from room temperature by 0.5~1.5 hour
~270 DEG C, then after being heated to by 1~2 hour 450~490 DEG C of insulations 0.5~1 hour, 1200 were heated to by 1~3 hour
~1260 DEG C, insulation cools to room temperature with the furnace after 0.5~1 hour.
Below, the present invention is further elaborated on by embodiment.
Embodiment 1：
Certain blade of aviation engine material is DD407 single crystal super alloys, and integral shroud damping area is regular is ground by fine motion for its
Damage and high-temperature oxydation, when preparing wear-resisting antioxidant coating using the molten painting of vacuum, interface generates a large amount of firmly crisp phases of silicide, turns into
The cradle of heat fatigue cracking, reduce the performance of coating and combined, it is necessary to carry out purification to interface and improve coating with matrix
Performance.Position to be fortified is successively polishing to shiny surface with miniature sander and sand paper, deformation layer and residual stress are removed, third
It is cleaned by ultrasonic in ketone to degrease with after impurity, is dried up with electric-heating air blower standby.By coated powder NiCr-75%Cr3C2、
Nickel base self-fluxing alloy powder Ni-19Cr-10Si and pure Cr powder are put into ball mill according to certain proportioning to be well mixed；Proportioning
Parameter：Pure Cr powder accounts for the 30% of coated powder weight, mixed-powder and the ni-based self-fluxing alloy powder of coated powder and pure Cr powder
Last Ni-19Cr-10Si weight ratio is 5:5, pure Cr powder purities are 99.95wt%, and powder size is 50~150 μm；Ball milling is joined
Number is：Rotating speed 300r/min, Ball-milling Time are 2 hours, ball material mass ratio 10:1.By mixed powder with it is organic viscous without ash content
Tie agent (such as：PMMA binding agents, i.e., the binding agent using polymetylmethacrylate as base) according to part by weight 8:After 1 mixing
Stir, form cream powder.
Cream powder is pressed into after the thin slice that size is 0.2mm single crystal super alloy table is placed in using hybrid method
Face, i.e., will be made cream powder and suppress flakiness and be placed directly in single crystal super alloy surface after ball milling mixing；Drying temperature
System is 100 DEG C/1h+200 DEG C/1h.Parts after drying are put into vacuum brazing furnace, 1.3 × 10-3Pa vacuum
Under complete pricker according to set temperature schedule and apply process, temperature schedule is：250 DEG C are heated to from room temperature by 0.5 hour, then is passed through
After spending 2 hours and being heated to 470 DEG C of insulations 0.5 hour, 1220 DEG C were heated to by 3 hours, insulation cools to the furnace after 0.5 hour
Room temperature.
Metallurgical binding and the wear-resisting antioxidant coating of interface purification can be obtained after taking-up, being delivered after necessary processing makes
With.As Figure 1-Figure 2, from single crystal super alloy interface, clean-up effect metallograph can be seen that DD407 single crystal substrate tissue bases
The hard crisp phase such as this holding original appearance, interface silicide disappears, and γ ' phase morphologies carry from matrix to coating continuous transition, thermal fatigue property
It is high by 50%.
Embodiment 2：
Certain aero-engine Low Pressure Turbine Rotor blade sawtooth is preced with damping area need to use wear-resisting resist due to fretting wear occurs
Oxide covering is protected.Blade material is DD6 nickel-base high-temperature single crystal alloys, and NiCoCrAlY- is being prepared using molten apply of vacuum
75%Cr3C2During wear-resisting antioxidant coating, single crystal substrate occurs tissue unstability, a large amount of intensified elements such as Ti, Ta etc. and spread to interface
MC type carbide is formed, while generates the firmly crisp phase of silicide, has had a strong impact on the performance of coating, it is necessary to be carried out to interface net
Change.Position to be fortified is successively polishing to shiny surface with miniature sander and sand paper, deformation layer and residual stress are removed, in acetone
Middle ultrasonic cleaning is dried up standby with degreasing with after impurity with electric-heating air blower.By coated powder NiCoCrAlY-75%
Cr3C2, nickel base self-fluxing alloy powder Ni-19Cr-10Si and pure Cr powder be put into according to certain proportioning in ball mill mix it is equal
It is even；Match parameter：Pure Cr powder accounts for the 40% of coated powder weight, the mixed-powder and nickel base self-fluxing of coated powder and pure Cr powder
Alloy powder Ni-19Cr-10Si weight ratio is 4:6, pure Cr powder purities are 99.95wt%, and powder size is 50~150 μm；
Ball milling parameter is：Rotating speed 400r/min, Ball-milling Time are 2 hours, ball material mass ratio 9:1.By mixed powder and without ash content
Organic binder bond is (such as：PMMA binding agents, i.e., the binding agent using polymetylmethacrylate as base) according to part by weight 7:1
Stirred after mixing, form cream powder.
Cream powder is pressed into after the thin slice that size is 0.3mm single crystal super alloy table is placed in using hybrid method
Face, i.e., will be made cream powder and suppress flakiness and be placed directly in single crystal super alloy surface after ball milling mixing；Drying temperature
System is 90 DEG C/2h+180 DEG C/2h.Parts after drying are put into vacuum brazing furnace, 1.0 × 10-3Pa vacuum
Under complete pricker according to set temperature schedule and apply process, temperature schedule is：270 DEG C are heated to from room temperature by 0.5 hour, then is passed through
After spending 2 hours and being heated to 490 DEG C of insulations 1 hour, 1210 DEG C were heated to by 2.5 hours, insulation cools to room with the furnace after 1 hour
Temperature.
Metallurgical binding and the wear-resisting antioxidant coating, coating layer thickness 0.2mm or so of interface purification, coating can be obtained after taking-up
Average hardness HV 900,1 times is improved compared with matrix hardness.It is delivered for use after necessary processing.DD6 single crystal substrate tissue bases
This holding original appearance, interface MC types carbide and silicide etc. it is hard it is crisp mutually disappear, γ ' phase morphologies from matrix to coating continuous transition,
Thermal fatigue property improves 30%.
Claims (8)
1. a kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy, it is characterised in that comprise the following steps：
(1) single crystal super alloy parts position to be fortified is successively polishing to shiny surface, eliminates deformation layer and residual stress, adopt
It is cleaned by ultrasonic with acetone and is degreased with after impurity, is dried up with electric-heating air blower standby；
(2) by coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2, nickel base self-fluxing alloy powder and pure Cr powder be put into ball mill
In be well mixed；
(3) mixed powder is formed into cream powder with being stirred after being mixed without ash content organic binder bond；
(4) single crystal super alloy parts surface to be fortified is positioned over after cream powder being suppressed into flakiness, is then placed in drying
Dried in case；
(5) parts after drying are put into vacuum brazing furnace, complete pricker under vacuo and apply process, after cooling to room temperature with the furnace
Take out, obtain metallurgical binding and the wear-resisting antioxidant coating of interface purification.
2. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (2), coated powder NiCr-Cr3C2Or MCrAlY-Cr3C2Cr3C2For Cr3C2Particles reiforced metal-base composition, point
Cai Yong not NiCr-75%Cr3C2Or MCrAlY-75%Cr3C2, M Ni, Co or NiCo.
3. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1 or 2, its feature exists
In, in step (2), the adding proportion of pure Cr powder is the 30%~50% of coated powder weight, coated powder and pure Cr powder it is mixed
It is 4 that powder, which is closed, with nickel base self-fluxing alloy powder weight ratio:6~5:5.
4. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (2), the granularity of coated powder, nickel base self-fluxing alloy powder or pure Cr powder is 50~150 μm.
5. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (2), ball mill parameter is：200~400r/min of rotating speed, Ball-milling Time are 1~4 hour, ball material mass ratio 6:1~
12:1。
6. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (3), mixed powder is 6 with the weight ratio without ash content organic adhesive:1~8:1.
7. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (4), cream powder is pressed into 0.1~0.5mm of thickness thin slice through mould, and monocrystalline high temperature is placed in using hybrid method
Alloy surface, i.e., will be made cream powder and suppress flakiness and be placed directly in single crystal super alloy surface after ball milling mixing；Dry
Drying degree is 80~100 DEG C of 1~3h of insulation, continues to be heated to 170~200 DEG C of 1~3h of insulation.
8. according to the interface purification method of the wear-resisting antioxidant coating of single crystal super alloy described in claim 1, it is characterised in that
In step (5), vacuum brazing furnace vacuum is 3 × 10-3Below Pa, the temperature schedule that pricker applies process are：From room temperature by 0.5~
220~270 DEG C are heated within 1.5 hours, then after being heated to by 1~2 hour 450~490 DEG C of insulations 0.5~1 hour, by 1
1200~1260 DEG C are heated within~3 hours, after being incubated 0.5~1 hour, cools to room temperature with the furnace.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710990759.2A CN107716933B (en) | 2017-10-23 | 2017-10-23 | A kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy |
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| CN201710990759.2A CN107716933B (en) | 2017-10-23 | 2017-10-23 | A kind of interface purification method of the wear-resisting antioxidant coating of single crystal super alloy |
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| CN107716933A true CN107716933A (en) | 2018-02-23 |
| CN107716933B CN107716933B (en) | 2019-05-03 |
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| CN109622973A (en) * | 2018-11-22 | 2019-04-16 | 淮北市菲美得环保科技有限公司 | A kind of preparation process of wearability stainless steel alloy coating |
| CN111926287A (en) * | 2020-05-19 | 2020-11-13 | 中国科学院金属研究所 | Surface pretreatment method for improving MCrAlY coating and monocrystal superalloy interface structure stability |
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