CN106435435A - Method for hypersonic flame spraying of abrasion resistant coating of aluminum alloy - Google Patents
Method for hypersonic flame spraying of abrasion resistant coating of aluminum alloy Download PDFInfo
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- CN106435435A CN106435435A CN201611015078.6A CN201611015078A CN106435435A CN 106435435 A CN106435435 A CN 106435435A CN 201611015078 A CN201611015078 A CN 201611015078A CN 106435435 A CN106435435 A CN 106435435A
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- aluminum alloy
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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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- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a method for hypersonic flame spraying of an abrasion resistant coating of aluminum alloy. The method comprises the steps that (1) the aluminum alloy base material is subjected to sand-blasting roughening treatment, and the degree of roughness is larger than Ra25; (2) impurities on the surface of the aluminum alloy base material subjected to sand-blasting roughening treatment are removed; (3) compound powder is mixed evenly, grinded and prepared into slurry, specifically, the compound powder comprises 10-15wt% of Si, 4-10wt% of Al2O3, 1-5wt% of Cu, and the balance Al; (4) the slurry is evenly sprayed onto the surface of the aluminum alloy base material, and drying is carried out at the temperature of 100-140 DEG C; and (5) hypersonic flame spraying is carried out on the surface of the aluminum alloy base material subjected to sand-blasting roughening treatment with propane gas as fuel, high-pressure oxygen as combustion-supporting gas and nitrogen gas as powder delivery gas; the spraying thickness is 700-800 microns, and the Si-Al2O3-Cu-Mn-Al abrasion resistant coating fused on the surface of the aluminum alloyis obtained. The Si-Al2O3-Cu-Mn-Al abrasion resistant coating is fused on the surface of the aluminum alloythrough hypersonic flame spraying, the hardness of the coating is larger than 323HV0.2, and compared with matrix aluminum alloy, the performance is improved by four times or over. The abrasion resistance of the aluminum alloyis greatly enhanced.
Description
Technical field
The present invention relates to field of material technology, more particularly to a kind of side of aluminium alloy HVAF wear-resistant coating
Method.
Background technology
The research deepened continuously to alumina-base material always by material subject scholar and engineers and technicians, alumina-base material
Modified aluminium alloy and aluminum matrix composite are developed into by traditional cast aluminium alloy gold.Aluminum matrix composite causes the wear-resisting of aluminium alloy
The comprehensive mechanical performance such as property and intensity is to increasing substantially.However, alumina-base material fusing point is low, hardness is low and wear no resistance lack
Fall into still without obtaining the basic range of application for overcoming, which greatly limits aluminium alloy.For many years, in order to overcome aluminum
The deficiency of alloy, the bulk modified and surface modification of aluminium alloy is always the direction of people's effort.
HVAF technology has the excellent properties of lot of advantages and Velocity Oxygen Flame Sprayed Coatings, scholars
All constantly, which is furtherd investigate with technical staff, constantly open up its application.With material science, computer
Applied science, automatic control technology and the development of itself of HVAF technology, HVAF technology is in industry
The many aspects in field obtain application or there is huge potential application.
By the heterogeneous village material in common material surface HVAF with particular characteristic, it is possible to obtain with spy
The high-quality coating of qualitative energy, reaches the purpose to common material surface modification, elongated component service life, expansion common material
Range.This surface modification includes to improve the intensity of material surface, wearability, corrosion resistance (including acid, alkali, salt corruption
Erosion and gas attack) and heat-resisting quantity etc..
HVAF is also referred to as high-velocity oxy-fuel spraying (High Velocity Oxygen Fuel-HVOF).Super
Velocity of sound flame-spraying be gaseous state or liquid fuel are mixed with high pressure oxygen after in specific combustor or nozzle burn, produce
High temperature, the burning flame stream of high speed be used to spraying.As the speed of combustion flame is the several times of velocity of sound, visually in visible flame stream
Bright " Mach section ", thus general HVOF are called HVAF.HVAF be 80 years 20th century
Generation research and development are successful, adopt combustor and the nozzle of particular design from HVAF unlike conventional flame-spraying,
The fuel of driving big flow is simultaneously combustion-supporting with high pressure oxygen, so as to obtain the burning flame stream of flank speed.Using liquid fuel
Spray gun, also referred to as high pressure HVAF (HP-HVOF), its combustion pressure up to 8.2 bars, 7 times of velocities of sound of flame speed with
On.The representative of this kind of product is the JP5000 type HVAF system with aerial kerosene as fuel.
Content of the invention
It is an object of the invention to proposing a kind of method of aluminium alloy HVAF wear-resistant coating, significantly can carry
The anti-wear performance of high-aluminium alloy.
The earlier application of the present invention proposes a kind of a kind of " wear-resisting painting of aluminium alloy HVAF Si-Cr-B-W-Al
The method of layer ", which substantially increases the wearability of aluminium alloy in one layer of Si-Cr-B-W-Al wear-resistant coating of aluminum alloy surface cladding
Energy.But as which adopts W, its processing difficulties, melt blending there is also certain difficulty, and therefore the present invention makes improvements, with
Find the material for replacing W.
For reaching this purpose, the present invention is employed the following technical solutions：
A kind of method of aluminium alloy HVAF wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 10-15wt%Si, 4-10wt%Al2O3, 1-5wt%Cu, 0.5-4wt%Mn and balance aluminum composite powder
Mix homogeneously, is deployed into slip after grinding；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 100-140 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, after sandblasting roughening
Aluminum alloy base material surface carries out HVAF, and during spraying, it is 20-30L/ that propane pressure is 0.55-0.7MPa, flow
Min, it is 180-200L/min that oxygen pressure is 0.65-0.7MPa, flow, and it is 18- that nitrogen pressure is 0.85-1MPa, flow
30L/min, coating thickness is 700-800 μm, to obtain cladding in the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
In the coating of the present invention, the addition of copper so that alloy has excellent antifriction function, while close with aluminum in cladding layer
Golden substrate surface forms stable intermetallic compound Al2Cu and Al2Cu3Deng, there is provided excellent bond strength.
The present invention passes through HVAF, in one layer of Si-Al of aluminum alloy surface cladding2O3The wear-resisting painting of-Cu-Mn-Al
Layer, its hardness is more than 323HV0.2, more than 5 times are improved compared with aluminum matrix alloy performance.Considerably increase the anti-wear performance of aluminium alloy.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of aluminium alloy HVAF Si-Al2O3The method of-Cu-Mn-Al wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 10wt%Si, 4wt%Al2O3, 1wt%Cu, 0.5wt%Mn and balance aluminum composite powder mix homogeneously,
Slip is deployed into after grinding；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 100 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, after sandblasting roughening
Aluminum alloy base material surface carries out HVAF, and during spraying, it is 20L/min that propane pressure is 0.55MPa, flow, oxygen
Pressure is 0.65MPa, and it is 0.85MPa that flow is 180L/min, nitrogen pressure, and flow is that 18L/min, coating thickness is 700 μm,
Cladding is obtained in the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
The present invention passes through HVAF, in one layer of Si-Al of aluminum alloy surface cladding2O3The wear-resisting painting of-Cu-Mn-Al
Layer, its hardness is 338HV0.2.
Embodiment 2
A kind of aluminium alloy HVAF Si-Al2O3The method of-Cu-Mn-Al wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 15wt%Si, 10wt%Al2O3, 5wt%Cu, 4wt%Mn and balance aluminum composite powder mix homogeneously, grind
Slip is deployed into after mill；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 140 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, after sandblasting roughening
Aluminum alloy base material surface carries out HVAF, and during spraying, it is 30L/min that propane pressure is 0.7MPa, flow, oxygen pressure
Power is 0.7MPa, and it is 1MPa that flow is 200L/min, nitrogen pressure, and flow is that 30L/min, coating thickness is 800 μm, is melted
It is overlying on the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
The present invention passes through HVAF, in one layer of Si-Al of aluminum alloy surface cladding2O3The wear-resisting painting of-Cu-Mn-Al
Layer, its hardness position 325HV0.2.
Embodiment 3
A kind of aluminium alloy HVAF Si-Al2O3The method of-Cu-Mn-Al wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 13wt%Si, 7wt%Al2O3, 3wt%Cu, 2wt%Mn and balance aluminum composite powder mix homogeneously, grind
Slip is deployed into after mill；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 100 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, after sandblasting roughening
Aluminum alloy base material surface carries out HVAF, and during spraying, it is 22L/min that propane pressure is 0.56MPa, flow, oxygen
Pressure is 0.68MPa, and it is 0.88MPa that flow is 185L/min, nitrogen pressure, and flow is that 26L/min, coating thickness is 730 μm,
Cladding is obtained in the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
The present invention passes through HVAF, in one layer of Si-Al of aluminum alloy surface cladding2O3The wear-resisting painting of-Cu-Mn-Al
Layer, its hardness is more than 341HV0.2.
Embodiment 4
A kind of aluminium alloy HVAF Si-Al2O3The method of-Cu-Mn-Al wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 14wt%Si, 5wt%Al2O3, 3wt%Cu, 1.5Mn and balance aluminum composite powder mix homogeneously, grinding
After be deployed into slip；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 110 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, after sandblasting roughening
Aluminum alloy base material surface carries out HVAF, and during spraying, it is 24L/min that propane pressure is 0.63MPa, flow, oxygen
Pressure is 0.68MPa, and it is 0.92MPa that flow is 190L/min, nitrogen pressure, and flow is that 21L/min, coating thickness is 760 μm,
Cladding is obtained in the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
The present invention passes through HVAF, in one layer of Si-Al of aluminum alloy surface cladding2O3The wear-resisting painting of-Cu-Mn-Al
Layer, its hardness is more than 336HV0.2.
Claims (1)
1. a kind of method of aluminium alloy HVAF wear-resistant coating, which includes：
(1) by aluminum alloy base material sandblasting roughening treatment, roughness is more than Ra25；
(2) aluminum alloy base material after sandblasting roughening treatment is removed surface impurity；
(3) by 10-15wt%Si, 4-10wt%Al2O3, 1-5wt%Cu and balance aluminum composite powder mix homogeneously, after grinding
It is deployed into slip；
(4) slip is uniformly coated on aluminum alloy base material surface, dries at 100-140 DEG C；
(5) it is fuel to adopt propane gas, and it is powder feeding gas that high pressure oxygen is combustion-supporting gas, nitrogen, the aluminum conjunction after sandblasting roughening
Golden substrate surface carries out HVAF, and during spraying, it is 20-30L/min that propane pressure is 0.55-0.7MPa, flow, oxygen
Atmospheric pressure is 0.65-0.7MPa, and it is 0.85-1MPa that flow is 180-200L/min, nitrogen pressure, and flow is 18-30L/min,
Coating thickness is 700-800 μm, obtains cladding in the Si-Al of aluminum alloy surface2O3- Cu-Mn-Al wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015078.6A CN106435435A (en) | 2016-11-18 | 2016-11-18 | Method for hypersonic flame spraying of abrasion resistant coating of aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015078.6A CN106435435A (en) | 2016-11-18 | 2016-11-18 | Method for hypersonic flame spraying of abrasion resistant coating of aluminum alloy |
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| CN106435435A true CN106435435A (en) | 2017-02-22 |
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| CN201611015078.6A Pending CN106435435A (en) | 2016-11-18 | 2016-11-18 | Method for hypersonic flame spraying of abrasion resistant coating of aluminum alloy |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202534A (en) * | 1998-04-17 | 1998-12-23 | 清华大学 | Method of preparing ceramic coating by laser smelting coating after metal surface plasma spray |
| CN101497978A (en) * | 2008-01-31 | 2009-08-05 | 北京赛亿表面工程技术有限公司 | Powder core wire material for high chrome molybdenum alloy arc spraying |
| CN101550549A (en) * | 2009-03-30 | 2009-10-07 | 湖北工业大学 | Al2O3/Al-Si composite coating by spray coating on aluminium alloy surface and preparation method |
| CN102021587A (en) * | 2010-12-03 | 2011-04-20 | 湖北工业大学 | AL2O3 plus TiB2 plus Al composite coating formed by reaction spray coating on surface of aluminum alloy and stirring friction welding and preparation method thereof |
-
2016
- 2016-11-18 CN CN201611015078.6A patent/CN106435435A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202534A (en) * | 1998-04-17 | 1998-12-23 | 清华大学 | Method of preparing ceramic coating by laser smelting coating after metal surface plasma spray |
| CN101497978A (en) * | 2008-01-31 | 2009-08-05 | 北京赛亿表面工程技术有限公司 | Powder core wire material for high chrome molybdenum alloy arc spraying |
| CN101550549A (en) * | 2009-03-30 | 2009-10-07 | 湖北工业大学 | Al2O3/Al-Si composite coating by spray coating on aluminium alloy surface and preparation method |
| CN102021587A (en) * | 2010-12-03 | 2011-04-20 | 湖北工业大学 | AL2O3 plus TiB2 plus Al composite coating formed by reaction spray coating on surface of aluminum alloy and stirring friction welding and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 蔡明伟等: "《喷涂工艺对超音速火焰喷涂Al-Cu-Fe-Si准晶合金涂层性能的影响》", 《表面技术》 * |
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