CN109628871A - A kind of aluminum alloy guide rail wear-resisting erosion resistance burn-out-proof adhesive coating layer and preparation and application - Google Patents
A kind of aluminum alloy guide rail wear-resisting erosion resistance burn-out-proof adhesive coating layer and preparation and application Download PDFInfo
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- CN109628871A CN109628871A CN201811465212.1A CN201811465212A CN109628871A CN 109628871 A CN109628871 A CN 109628871A CN 201811465212 A CN201811465212 A CN 201811465212A CN 109628871 A CN109628871 A CN 109628871A
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- 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
- C22C29/08—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 based on tungsten carbide
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- Coating By Spraying Or Casting (AREA)
Abstract
The present invention relates to hot-spraying coating fields, and in particular to a kind of aluminum alloy guide rail wear-resisting erosion resistance burn-out-proof adhesive coating layer and preparation and application.The wear-resisting erosion resistance burn-out-proof adhesive coating layer of the aluminum alloy guide rail includes cermet coating, wherein cermet coating includes following component by mass percentage: Co 10~20%, tungsten carbide ceramics 80~90%；The present invention uses cobalt and tungsten carbide mixed-powder to form cermet coating on aluminium alloy matrix surface by supersonic flame spraying for raw material, and then aluminum alloy guide rail is obtained with wear-resisting erosion resistance burn-out-proof adhesive coating layer, the coating is uniform and compact for this, the corrosion-resistant of guide rail, abrasion, the viscous characteristic of high speed flame stream resistant to high temperatures burning can be improved, and then improve the military service performance of guide rail, guide rail maintenance, maintenance activity frequency and difficulty are reduced, integrated combat capability is improved.
Description
Technical field
The present invention relates to hot-spraying coating fields, and in particular to a kind of wear-resisting erosion resistance burn-out-proof adhesive coating layer of aluminum alloy guide rail
And preparation and application.
Background technique
Aviation is cast using aluminium alloy with certain guide rail, is machining.Need to bear vibration, friction, corruption during being on active service
The complex working conditions such as erosion, hot flame stream erosion.In body vibration friction, atmosphere especially sea atmosphere corrosion, transmitting wake flame erosion
Comprehensive function under, guide rail surface is easy to produce abrasion, burn into burns viscous phenomenon, and guide rail strength reduction, surface quality is caused to become
Difference, service life are remarkably decreased, and even influence to work normally under serious conditions, reduce fighting capacity.Therefore, guide rail need to have it is wear-resistant,
Erosion resistance burn into high temperature resistant burns comprehensive performances, the current aluminum alloy materials such as viscous and is difficult to meet above-mentioned requirements simultaneously.It is closed in aluminium
Golden guide rail surface prepares the controllable wear-and corrosion-resistant burn-out-proof adhesive coating layer of a layer thickness, is the effective way for improving guide rail military service performance.
The existing major technique for solving guide rail corrosive wear is existed by laser melting coating, thermal spraying or electrochemical oxidation technology
Guide rail surface prepares protective coating.Such as application No. is the patent of invention of 201210559476.X, " large-scale measuring machine guide rail surface is multiple
Close the preparation method of coating " in, a layer thickness is coated on mild steel measuring machine guide rail using supersonic velocity flame plating equipment
For 0.1~0.3mm NiCr alloy coat as bottom, one layer is then sprayed on bottom using supersonic velocity flame plating equipment
The NiCrBSi alloy coat of 0.1~0.55mm finally brushes one layer of organic painting of epoxy resin in coating surface as working lining
Material, improves that measuring machine guide rail is wear-resisting and corrosion resistance.Application No. is a kind of " the aluminium conjunctions of 201611015099.8 patent of invention
The method of golden laser fusing and coating wear-resistant coating " in, one layer of SiC-Cr is prepared in aluminum alloy surface using laser melting and coating technique2O3-
TiN-Al wear-resistant coating, coating hardness 324HV0.2, 4 times are improved compared with matrix hardness, increases aluminium alloy wear-proof performance.At present
There has been no the patents of invention in the anti-corrosion burn-out-proof adhesive coating layer of aluminum alloy guide rail material surface spraying abrasion-proof to solve the above problems.
Summary of the invention
For overcome the deficiencies in the prior art and disadvantage, it is used the primary purpose of the present invention is that providing a kind of aluminum alloy guide rail
Wear-resisting erosion resistance burn-out-proof adhesive coating layer, which can be improved the wear-resisting, anti-corrosion of aluminum alloy guide rail, burn-out-proof glues characteristic, improve guide rail
Military service performance.
Another object of the present invention is to provide the above-mentioned aluminum alloy guide rail preparation sides of wear-resisting erosion resistance burn-out-proof adhesive coating layer
Method, this method spray to obtain using supersonic flame spraying technology on aluminum alloy guide rail surface, and the coating is uniform and compact for this, can be improved
The corrosion-resistant of guide rail, abrasion, high speed flame stream resistant to high temperatures burn viscous characteristic, and then improve the military service performance of guide rail, the maintenance of reduction guide rail,
Maintenance activity frequency and difficulty improve integrated combat capability.
A further object of the present invention is to provide the applications of wear-resisting erosion resistance burn-out-proof adhesive coating layer of above-mentioned aluminum alloy guide rail.
The purpose of the invention is achieved by the following technical solution:
A kind of wear-resisting erosion resistance burn-out-proof adhesive coating layer of aluminum alloy guide rail includes cermet coating；
The cermet coating includes following component by mass percentage: Co 10~20%, tungsten carbide ceramics 80
~90%；
The cermet coating is sprayed on matrix surface by supersonic flame spraying mode and is obtained；
The cermet coating preferably uses cobalt and tungsten carbide mixed-powder to pass through supersonic flame spraying system for raw material
It is standby to obtain；
The aluminum alloy guide rail preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, comprises the following steps:
(1) blasting treatment: carrying out blasting treatment to aluminum alloy guide rail coating surface to be painted, to purify roughening substrate surface, guarantees
Coating is well combined with substrate；
(2) it sprays: after blasting treatment, using cobalt and tungsten carbide mixed-powder as raw material, by supersonic flame spraying in aluminium
Alloy substrate forms cermet coating on surface, obtains aluminum alloy guide rail with wear-resisting erosion resistance burn-out-proof adhesive coating layer；
Aluminum alloy guide rail described in step (1) preferably carries out pretreatment and protection processing, and concrete operations are as follows:
Visually inspect aluminum alloy guide rail coating surface to be painted, it is ensured that without obviously collide with, the obvious shortcomings such as pit, stomata, burr, adopt
With acetone or alcohol wipe aluminum alloy guide rail coating surface to be painted to degrease, fixes and protect using protecting tool set-up and protective rubber band
Guide rail non-spraying face and screw hole are not contaminated；
The concrete operations of blasting treatment described in step (1) are preferred are as follows:
Sandblasting roughening is carried out to aluminum alloy guide rail surface using the mixing Brown Alundum sand grains of 16~40 mesh；
The concrete operations of the sandblasting roughening are preferred are as follows:
Sandblasting compressed air must be dried, is oil-free, 0.5~0.8MPa of air pressure, and jet angle is 70~90 °, sandblasting distance
For 0.1~0.2m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface；
The fuel of supersonic flame spraying described in step (2) is preferably propane or kerosene, combustion-supporting gas be oxygen or
Air；
The condition of the supersonic flame spraying is preferred are as follows:
Combustion-supporting gas pressure is 0.2~1.2MPa, 0.5~1.5MPa of fuel pressure；10~40g/min of powder feed rate；Spray
Apply 150~250mm of distance；60~90 ° of spray angle；200~500mm/s of spraying rate；Spray 2~5mm of step pitch；
When the combustion-supporting gas is air, 0.6~0.8MPa of combustion-supporting gas pressure；The combustion-supporting gas is oxygen
When, 0.2~1.2MPa of combustion-supporting gas pressure；
When the fuel is propane, 0.5~0.7MPa of fuel pressure；When the fuel is kerosene, fuel pressure 0.6
~1.5MPa；
Aluminum alloy guide rail surface is preferably preheated to greater than 50 DEG C before the supersonic flame spraying, and aluminium closes in spraying process
Golden guide rail surface temperature is less than 200 DEG C；
The supersonic flame spraying preferably uses the modes such as multi-pass spraying, supplementary compressed air cooling to prevent from applying
Layer overheat；
Aluminum alloy guide rail described in step (2) with the thickness of wear-resisting erosion resistance burn-out-proof adhesive coating layer be preferably 0.1~
0.6mm；
Cermet coating described in step (2) can further attrition process；Make guide rail size precision by attrition process
It is met the requirements with surface roughness；
The concrete operations of the attrition process are preferred are as follows:
Cermet coating is roughly ground using 80~200 mesh skives, 20~30m/s of grinding speed, the depth of cut
0.01~0.02mm polishes cermet coating using diamond paste after corase grinding；
Application of the aluminum alloy guide rail with wear-resisting erosion resistance burn-out-proof adhesive coating layer in aluminum alloy surface process field；
A kind of aluminum alloy guide rail wear-resisting erosion resistance burn-out-proof adhesive coating layer/aluminum alloy guide rail composite material, including aluminium alloy base
Body and the wear-resisting erosion resistance burn-out-proof adhesive coating layer of aluminum alloy guide rail for being sprayed on aluminium alloy matrix surface；
The present invention has the following advantages and effects with respect to the prior art:
(1) the wear-resisting erosion resistance burn-out-proof snearing composition of layer of aluminum alloy guide rail provided by the invention forms simple, and proportion is reasonable
Science, even compact, with high rigidity, high bond strength, high-compactness, wearability is good, corrosion resistance is good, high temperature-proof flame stream burns and glues
Etc. characteristics can solve the abrasion on aluminum alloy guide rail surface, burn into is burnt as a kind of special tungsten carbide system metal-cermic coating
Phenomena such as viscous, to improve the military service performance and equipment operational reliability of guide rail.
(2) present invention uses supersonic flame spraying technology in aluminum alloy guide rail wheat flour to be sprayed for one layer of 0.1~0.6mm
The viscous tungsten carbide system metal-cermic coating of the even compact of thickness, high rigidity, high bond strength, anti-corrosion resistance to burning, passes through coating chemistry
Optimizing components design, supersonic flame spraying process optimization guarantee the bond strength of coating and guide rail, surface roughness and micro-
The requirement of hardness.Wherein, the bond strength of coating and aluminum alloy guide rail be 50~70MPa, the final surface roughness Ra of coating≤
0.2 μm, the microhardness of coating is 1000~1400HV0.1。
(3) aluminum alloy guide rail provided by the invention with wear-resisting erosion resistance burn-out-proof adhesive coating layer be mainly used for air-to-air missile carry and
Shoe or other similar particular components, can effectively improve guide rail surface hardness, wearability, corrosion resistance and burn-out-proof
Viscous characteristic, extends the guide rail time between overhauls(TBO), reduces maintenance difficulty, improves service life, improve integrated combat capability, has important
Application value.Compared with existing guide rail, has the characteristics that hardness is high, corrosion resistance is good, wearability is good, the sticky energy of burn-out-proof is good, can solve
Corrosion, wear, the viscous problem of burning during certainly existing guide rail military service.
(4) present invention with application No. is the patents of 201210559476.X using different formula and aftertreatment technology, with
Application No. is 201611015099.8 patents to use different technology and formula.The present invention is by adjusting formula and preparation
Technique, coating is wear-resisting, anti-corrosion, high temperature resistance is superior to above-mentioned patent, while by post-processing grinding-polishing, reducing coating
Surface roughness by certification test there is apparent burn-out-proof to glue characteristic.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Embodiment 1
(1) pre-process and protect: visually inspect aluminum alloy guide rail coating surface to be painted, it is ensured that without obviously collide with, pit, stomata,
The obvious shortcomings such as burr are degreased using acetone or alcohol wipe coating surface to be painted, are fixed using protecting tool set-up and protective rubber band
And guide rail non-spraying face and screw hole is protected not to be contaminated；
(2) blasting treatment: aluminum alloy guide rail uses mass ratio for 40 mesh of 1:1 after tooling, protection rubber belt clamping protection
Blasting treatment is carried out with 16 mesh mixing Brown Alundum sand grains, sandblasting compressed air must be dried, is oil-free, air pressure 0.5MPa, injection
90 ° of angle, sandblasting distance 0.10m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface；By blasting treatment, only
Change roughening substrate surface, guarantees that coating is well combined with substrate；
(3) spray: after blasting treatment, by mass percent be 10% cobalt dust and mass percent be 90% carbonization
Tungsten powder mixing, obtains mixed-powder；Aluminum alloy guide rail surface after blasting treatment is preheated to 60 DEG C, then with mixed-powder
For raw material, cermet coating, supplementary compressed air in spraying process are formed on alloy matrix aluminum by supersonic flame spraying
Cooling enables aluminum alloy to guide rail surface temperature less than 200 DEG C, obtains the aluminum alloy guide rail with a thickness of 0.55mm to prevent coating from overheating
With wear-resisting erosion resistance burn-out-proof adhesive coating layer, wherein the condition of supersonic flame spraying are as follows: fuel is propane, and combustion-supporting gas is air,
Air pressure 0.8MPa, propane pressure 0.7MPa, powder feed rate 20g/min, spray distance 200mm, 90 ° of spray angle, spray
Speed 500mm/s is applied, step pitch 3mm, substrate temperature is less than 200 DEG C；
(4) cermet coating is roughly ground using 80 mesh skives, grinding speed 30m/s, depth of cut 0.02mm,
Cermet coating is polished using diamond paste after corase grinding；
Aluminum alloy guide rail made from the present embodiment is 0.55mm with the original thickness of wear-resisting erosion resistance burn-out-proof adhesive coating layer, is used
The measurement standard that GB/T8642-2002 thermally sprayed coating stretches bond strength measures coating sample average bonding strength and is greater than 60MPa,
Final surface roughness Ra≤0.2 μm of coating is measured using surface roughness tester, it is flat to measure coating sample using metallographic method
It is big to measure coating average microhardness using GB/T10125-2012 Vickers Hardness Test of Metallic Materials less than 1% for equal porosity
In 1200HV0.1, tested through 100 analog transmissions, coating surface does not have obvious combustion product burning to adhere to (analog transmissions test
It is carried out in Special-purpose bench testing equipment, high temperature, high speed flame stream and the combustion product generated by the simulated missile T-time, to survey
Whether examination emission process floating coat has ablation, burns phenomena such as gluing, cracking).
Embodiment 2
(1) pre-process and protect: visually inspect aluminum alloy guide rail coating surface to be painted, it is ensured that without obviously collide with, pit, stomata,
The obvious shortcomings such as burr are degreased using acetone or alcohol wipe coating surface to be painted, are fixed using protecting tool set-up and protective rubber band
And guide rail non-spraying face and screw hole is protected not to be contaminated；
(2) blasting treatment: aluminum alloy guide rail uses mass ratio for 40 mesh of 1:2 after tooling, protection rubber belt clamping protection
Blasting treatment is carried out with 24 mesh mixing Brown Alundum sand grains, sandblasting compressed air must be dried, is oil-free, air pressure 0.8MPa, injection
70 ° of angle, sandblasting distance 0.2m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface；Pass through blasting treatment, purification
It is roughened substrate surface, guarantees that coating is well combined with substrate；
(3) spray: after blasting treatment, by mass percent be 20% cobalt dust and mass percent be 80% carbonization
Tungsten powder mixing, obtains mixed-powder；Aluminum alloy guide rail surface after blasting treatment is preheated to 55 DEG C, then with mixed-powder
For raw material, cermet coating, supplementary compressed air in spraying process are formed on alloy matrix aluminum by supersonic flame spraying
Cooling enables aluminum alloy to guide rail surface temperature less than 200 DEG C, obtains the aluminum alloy guide rail with a thickness of 0.6mm to prevent coating from overheating
With wear-resisting erosion resistance burn-out-proof adhesive coating layer, wherein the condition of supersonic flame spraying are as follows: fuel is propane, and combustion-supporting gas is air,
Air pressure 0.6MPa, propane pressure 0.5MPa, powder feed rate 10g/min, spray distance 150mm, 90 ° of spray angle, spray
Speed 200mm/s is applied, step pitch 2mm, substrate temperature is less than 200 DEG C；
(4) cermet coating is roughly ground using 200 mesh skives, grinding speed 20m/s, the depth of cut
0.01mm polishes cermet coating using diamond paste after corase grinding；
Aluminum alloy guide rail made from the present embodiment is 0.6mm with the original thickness of wear-resisting erosion resistance burn-out-proof adhesive coating layer, is used
The measurement standard that GB/T8642-2002 thermally sprayed coating stretches bond strength measures coating sample average bonding strength and is greater than 62MPa,
Final surface roughness Ra≤0.1 μm of coating is measured using surface roughness tester, it is flat to measure coating sample using metallographic method
It is big to measure coating average microhardness using GB/T10125-2012 Vickers Hardness Test of Metallic Materials less than 1% for equal porosity
In 1100HV0.1, tested through 100 analog transmissions, coating surface does not have obvious combustion product burning to adhere to (analog transmissions test
It is carried out in Special-purpose bench testing equipment, high temperature, high speed flame stream and the combustion product generated by the simulated missile T-time, to survey
Whether examination emission process floating coat has ablation, burns phenomena such as gluing, cracking).
Embodiment 3
(1) pre-process and protect: visually inspect aluminum alloy guide rail coating surface to be painted, it is ensured that without obviously collide with, pit, stomata,
The obvious shortcomings such as burr are degreased using acetone or alcohol wipe coating surface to be painted, are fixed using protecting tool set-up and protective rubber band
And guide rail non-spraying face and screw hole is protected not to be contaminated；
(2) blasting treatment: aluminum alloy guide rail uses mass ratio for 40 mesh of 2:1 after tooling, protection rubber belt clamping protection
Blasting treatment is carried out with 24 mesh mixing Brown Alundum sand grains, sandblasting compressed air must be dried, is oil-free, air pressure 0.55MPa, injection
90 ° of angle, sandblasting distance 0.1m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface；Pass through blasting treatment, purification
It is roughened substrate surface, guarantees that coating is well combined with substrate；
(3) spray: after blasting treatment, by mass percent be 12% cobalt dust and mass percent be 88% carbonization
Tungsten powder mixing, obtains mixed-powder；Aluminum alloy guide rail surface after blasting treatment is preheated to 70 DEG C, then with mixed-powder
For raw material, cermet coating, supplementary compressed air in spraying process are formed on alloy matrix aluminum by supersonic flame spraying
Cooling enables aluminum alloy to guide rail surface temperature less than 200 DEG C, obtains the aluminum alloy guide rail with a thickness of 0.5mm to prevent coating from overheating
With wear-resisting erosion resistance burn-out-proof adhesive coating layer, wherein the condition of supersonic flame spraying are as follows: fuel is propane, and combustion-supporting gas is oxygen,
Oxygen pressure 0.2MPa, propane pressure 0.65MPa, powder feed rate 40g/min, spray distance 200mm, 60 ° of spray angle, spray
Speed 500mm/s is applied, step pitch 5mm, substrate temperature is less than 200 DEG C；
(4) cermet coating is roughly ground using 120 mesh skives, grinding speed 30m/s, the depth of cut
0.01mm polishes cermet coating using diamond paste after corase grinding, obtains aluminum alloy guide rail with wear-resisting erosion resistance
Burn-out-proof adhesive coating layer；
Aluminum alloy guide rail made from the present embodiment is 0.5mm with the original thickness of wear-resisting erosion resistance burn-out-proof adhesive coating layer, is used
The measurement standard that GB/T8642-2002 thermally sprayed coating stretches bond strength measures coating sample average bonding strength and is greater than 55MPa,
Final surface roughness Ra≤0.15 μm of coating is measured using surface roughness tester, it is flat to measure coating sample using metallographic method
It is big to measure coating average microhardness using GB/T10125-2012 Vickers Hardness Test of Metallic Materials less than 1% for equal porosity
In 1200HV0.1, tested through 100 analog transmissions, coating surface does not have obvious combustion product burning to adhere to (analog transmissions test
It is carried out in Special-purpose bench testing equipment, high temperature, high speed flame stream and the combustion product generated by the simulated missile T-time, to survey
Whether examination emission process floating coat has ablation, burns phenomena such as gluing, cracking).
Embodiment 4
(1) pre-process and protect: visually inspect aluminum alloy guide rail coating surface to be painted, it is ensured that without obviously collide with, pit, stomata,
The obvious shortcomings such as burr are degreased using acetone or alcohol wipe coating surface to be painted, are fixed using protecting tool set-up and protective rubber band
And guide rail non-spraying face and screw hole is protected not to be contaminated；
(2) blasting treatment: aluminum alloy guide rail uses mass ratio for 40 mesh of 1:1 after tooling, protection rubber belt clamping protection
Blasting treatment is carried out with 24 mesh mixing Brown Alundum sand grains, sandblasting compressed air must be dried, is oil-free, air pressure 0.55MPa, injection
90 ° of angle, sandblasting distance 0.1m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface；Pass through blasting treatment, purification
It is roughened substrate surface, guarantees that coating is well combined with substrate；
(3) spray: after blasting treatment, by mass percent be 17% cobalt dust and mass percent be 83% carbonization
Tungsten powder mixing, obtains mixed-powder；Aluminum alloy guide rail surface after blasting treatment is preheated to 80 DEG C, then with mixed-powder
For raw material, cermet coating, supplementary compressed air in spraying process are formed on alloy matrix aluminum by supersonic flame spraying
Cooling enables aluminum alloy to guide rail surface temperature less than 200 DEG C, obtains the aluminum alloy guide rail with a thickness of 0.4mm to prevent coating from overheating
With wear-resisting erosion resistance burn-out-proof adhesive coating layer, wherein the condition of supersonic flame spraying are as follows: fuel is kerosene, and combustion-supporting gas is oxygen,
Oxygen pressure 1.2MPa, kerosene pressure 1.5MPa, powder feed rate 40g/min, spray distance 240mm, sprays by 90 ° of spray angle
Speed 500mm/s is applied, step pitch 3mm, substrate temperature is less than 200 DEG C；
(4) cermet coating is roughly ground using 80 mesh skives, grinding speed 30m/s, depth of cut 0.02mm,
Cermet coating is polished using diamond paste after corase grinding；
Aluminum alloy guide rail made from the present embodiment is 0.4mm with the original thickness of wear-resisting erosion resistance burn-out-proof adhesive coating layer, is used
The measurement standard that GB/T8642-2002 thermally sprayed coating stretches bond strength measures coating sample average bonding strength and is greater than 65MPa,
Final surface roughness Ra≤0.05 μm of coating is measured using surface roughness tester, it is flat to measure coating sample using metallographic method
It is big to measure coating average microhardness using GB/T10125-2012 Vickers Hardness Test of Metallic Materials less than 1% for equal porosity
In 1200HV0.1, tested through 100 analog transmissions, coating surface does not have obvious combustion product burning to adhere to (analog transmissions test
It is carried out in Special-purpose bench testing equipment, high temperature, high speed flame stream and the combustion product generated by the simulated missile T-time, to survey
Whether examination emission process floating coat has ablation, burns phenomena such as gluing, cracking).
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of wear-resisting erosion resistance burn-out-proof adhesive coating layer of aluminum alloy guide rail, it is characterised in that include cermet coating；
The cermet coating includes following component by mass percentage: Co 10~20%, and tungsten carbide ceramics 80~
90%；
The cermet coating is sprayed on matrix surface by supersonic flame spraying mode and is obtained.
2. the wear-resisting erosion resistance burn-out-proof adhesive coating layer of aluminum alloy guide rail according to claim 1, it is characterised in that
The cermet coating uses cobalt and tungsten carbide mixed-powder to be prepared for raw material by supersonic flame spraying.
3. the aluminum alloy guide rail of any of claims 1 or 2 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, it is characterised in that
It comprises the following steps:
(1) blasting treatment: carrying out blasting treatment to aluminum alloy guide rail coating surface to be painted, to purify roughening substrate surface, guarantees coating
It is well combined with substrate；
(2) it sprays: after blasting treatment, using cobalt and tungsten carbide mixed-powder as raw material, by supersonic flame spraying in aluminium alloy
Cermet coating is formed on matrix surface, obtains aluminum alloy guide rail with wear-resisting erosion resistance burn-out-proof adhesive coating layer.
4. the aluminum alloy guide rail according to claim 3 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
The concrete operations of blasting treatment described in step (1) are as follows:
Sandblasting roughening is carried out to aluminum alloy guide rail surface using the mixing Brown Alundum sand grains of 16~40 mesh.
5. the aluminum alloy guide rail according to claim 4 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
The concrete operations of the sandblasting roughening are as follows:
Sandblasting compressed air must be dried, is oil-free, 0.5~0.8MPa of air pressure, and jet angle is 90 ± 20 °, and sandblasting distance is 0.1
~0.2m, until matt color fresh metal surface is exposed in sandblasting to guide rail surface.
6. the aluminum alloy guide rail according to claim 3 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
The fuel of supersonic flame spraying described in step (2) is propane or kerosene, and combustion-supporting gas is oxygen or air.
7. the aluminum alloy guide rail according to claim 3 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
The condition of the supersonic flame spraying are as follows:
Combustion-supporting gas pressure is 0.2~1.2MPa, 0.5~1.5MPa of fuel pressure；10~40g/min of powder feed rate；Spraying away from
From 150~250mm；60~90 ° of spray angle；200~500mm/s of spraying rate；Spray 2~5mm of step pitch.
8. the aluminum alloy guide rail according to claim 7 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
When the combustion-supporting gas is air, 0.6~0.8MPa of combustion-supporting gas pressure is helped when the combustion-supporting gas is oxygen
Fire 0.2~1.2MPa of gas pressure；
When the fuel is propane, 0.5~0.7MPa of fuel pressure, when the fuel is kerosene, fuel pressure 0.6~
1.5MPa。
9. the aluminum alloy guide rail according to claim 3 preparation method of wear-resisting erosion resistance burn-out-proof adhesive coating layer, feature exist
In:
Aluminum alloy guide rail described in step (2) is with wear-resisting erosion resistance burn-out-proof adhesive coating layer with a thickness of 0.1~0.6mm.
10. aluminum alloy guide rail of any of claims 1 or 2 is with wear-resisting erosion resistance burn-out-proof adhesive coating layer in aluminum alloy surface process field
In application.
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