CN108796493A - A kind of sealing of hole method of modifying of light metal surface cold spraying coating - Google Patents
A kind of sealing of hole method of modifying of light metal surface cold spraying coating Download PDFInfo
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- CN108796493A CN108796493A CN201810563205.9A CN201810563205A CN108796493A CN 108796493 A CN108796493 A CN 108796493A CN 201810563205 A CN201810563205 A CN 201810563205A CN 108796493 A CN108796493 A CN 108796493A
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- Prior art keywords
- cold spraying
- coating
- sealing
- light metal
- metal surface
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Classifications
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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
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
Abstract
The present invention relates to light metal surface protection technology fields, and in particular to the sealing of hole of light metal surface protective coating and the technical method of modification.The invention discloses a kind of based on double-deck glow plasma permeating technology to the plasma deposition heat-treatment technology method of light metal surface cold spraying coating progress sealing of hole, diffusion；The light metal workpieces of cold spraying coating treatment are put into double brightness stoves, the target of workpiece and coating same material is heated using double Hollow cathode discharge effects, target is placed on source electrode frame, under the plasma bombardment caused by glow discharge, it is thermally formed evaporation and sputtering, it is deposited in workpiece surface, it is spread because workpiece is heated, sealing of hole and DIFFUSION TREATMENT are carried out to the cold spraying of workpiece, to eliminate coating surface and internal hole, and diffusion layer is formed between coating and substrate work-piece, reaching improves cold spraying coating and the not high disadvantage of substrate work-piece bond strength.
Description
Technical field
The present invention relates to the shells of aircraft, ship and automobile etc. and piece surface protection technology field, and in particular to a kind of
The sealing of hole of light metal surface protective coating and the technical method of modification.
Background technology
Cold spraying is that compressed air accelerates metallic to critical speed（Supersonic speed）, metallic direct attack to matrix surface
A kind of coat preparing technology of coating is accumulated and formed to generation physical deformation afterwards.Metallic hits flat in matrix surface and securely attached
It, whole process metallic is not melted.Substantially without working condition requirement, noise is less than 60 decibels for cold spraying.Cold spraying is without height
Temperature, no flame, no hazardous gas, radiationless and chemical waste, can hand operation, it is safe, and directionality and good, it is operable
Property it is strong, aircraft, ship and automotive coatings prepare and repair in terms of have wide utilization.
To improve the corrosion resistance of aircraft skin and parts, generally use cold spray technique carries out coating guarantor to it
Shield, repair.However, protective coating prepared by cold spraying usually occurs, hole is more, disadvantage of bond strength deficiency.These defects are led
Coating is caused to lose protective value rapidly under service condition.
Double-deck glow plasma permeating technology（Hereinafter referred to as：Double brightness）It is using plasma and to use solid-state metallic material
As the supply source of infiltration element, the alloy-layer with specific physical chemical property is formed in electrically conductive material surface.At one
In vacuum chamber, two cathodes, one anode is set.One of cathode is made of desire co-diffusioning alloy element, referred to as source electrode, in sun
Pole and cathode (workpiece) connect a controllable direct current power supply respectively between source electrode.When vacuum chamber reaches certain vacuum degree and is filled with
After argon gas reaches certain operating air pressure, two DC power supplies are connected, make to generate respectively between anode and workpiece, anode and source electrode
Two groups of glow discharges, i.e. " double skin facade system phenomenon ".Under the argon ion bombardment effect caused by glow discharge, source electrode and work
The alloying element on part surface can be sputtered out, since source potential is set at less than workpiece current potential or makes source power density
Higher than workpiece power density, the supply amount of the particle sputtered out from source electrode far more than cathode reverse sputtering amount, to make these
The atom high speed for the infiltration element for being sputtered out flies to workpiece surface, is adsorbed and inwardly spread by workpiece surface, make workpiece
Surface forms designed alloy-layer.Temperature can be accurately controlled by adjusting parameters such as operating air pressure, source potential, cathode potentials
Degree, can realize the control of the alloying element content and alloying layer thickness in alloy-layer, and in coating and base under certain soaking time
Diffusion layer is formed between body workpiece（The current situation and development China engineering science 2002 of Xu Chong plasma surface metallurgical technologies;2:36-41.）.
Based on this principle, the hole of cold spraying coating is eliminated using two-lime piles, and improves the knot of coating and workpiece
Close intensity.Shell and piece surface guard technology of the process for cold spray technique in aircraft, ship and automobile etc. are led
Further research and development and the application in domain are of great significance.
Invention content
The object of the invention overcome in the prior art light metal surface cold spraying protective coating usually occur hole it is more, combine
The deficiency of the disadvantage of intensity deficiency provides a kind of light metal surface cold spraying coating sealing of hole and the surface protection technique of modification.This
Invention uses double-deck glow plasma permeating technology, is carried out at sealing of hole modification to workpiece prepared by light metal surface cold spraying coating
Reason substantially reduces the voidage of coating, and forms one layer of diffusion layer between coating and substrate work-piece, significantly improves cold spraying painting
The bond strength of layer and substrate work-piece, to reach the barrier propterty for promoting coating.
Double-deck glow plasma permeating technical principle of the present invention is as follows：In a vacuum chamber, two cathodes and one are set
A anode；One of cathode is light metal surface cold spraying coating same material target, is placed on conductive material（Such as graphite, difficulty
Molten metal or high temperature alloy）In manufactured crucible, also referred to as source electrode；Another cathode is substrate work-piece；Anode is earthing pole,
That is furnace body；Connect a controllable direct current power supply respectively between anode and cathode-workpiece and source electrode target；When vacuum chamber reaches certain
Vacuum degree and after being filled with the operating air pressure that argon gas reaches certain, connect two DC power supplies, make anode and cathode-workpiece, anode
Generate two groups of glow discharges respectively between source electrode target；Under the argon ion bombardment effect caused by glow discharge, source electrode quilt
Heating melts and generates evaporation, meanwhile, the bombardment of argon ion also sputters a large amount of coating same material atom and atomic group.It splashes
Atom and the atomic group high speed penetrate, being evaporated fly to workpiece surface, are adsorbed and deposited by workpiece surface.It is applied to workpiece
Electric field also generates glow discharge, and workpiece is made to be heated, and will make the coating same material for being deposited on its surface after reaching suitable temperature
Atom is inwardly spread, and makes that surface coating is more fine and close, porosity is substantially reduced, and formed between substrate work-piece and coating
Certain thickness diffusion layer.It can by adjusting parameters such as operating air pressure, source potential, cathode potential and source electrode-workpiece spacing
Temperature is accurately controlled, the control of coating compactness and thickness of diffusion layer can be realized under certain soaking time.
The present invention is achieved through the following technical solutions above-mentioned purpose：A kind of sealing of hole of light metal surface cold spraying coating
Method of modifying carries out plating, in light gold using double-deck glow plasma permeating stove to workpiece prepared by light metal cold spraying coating
Belong to and forms one layer of diffusion layer between matrix and cold spraying coating.
Preferably, the sealing of hole method of modifying of the light metal surface cold spraying coating, specific method are：By light metal table
Cold spraying coating same material target in face is put into vacuum chamber and is placed on source electrode, and light metal surface cold spraying coated workpieces are placed under source electrode
Side adjust certain interpolar away from；After adjustment vacuum chamber reaches certain vacuum degree and is filled with argon gas to operating air pressure, to source electrode plus directly
Stream negative voltage makes in source electrode target micro- molten and keeps electric discharge sputtering state, then adds to light metal surface cold spraying coated workpieces negative
Voltage makes workpiece be warming up to technological temperature, and it is certain that adjustment light metal surface cold spraying coated workpieces negative electricity is depressed into 200 ~ 750V heat preservations
Time；Cool down later, come out of the stove to obtain the light metal surface cold spraying coated workpieces of sealing of hole modification.
Preferably, the interpolar is away from for 10 ~ 50mm；
Preferably, the pressure of the operating air pressure is 10 ~ 80Pa；
Preferably, described to add the voltage of negative DC voltage to be 200 ~ 1000V source electrode；
Preferably, the light metal surface cold spraying coated workpieces add the negative voltage of negative voltage to be 200 ~ 1000V；
Preferably, the technological temperature is 200 ~ 900 DEG C；
Preferably, the held for some time refers to 0.5 ~ 10h of heat preservation.
Preferably, the cold spraying coating is the pure titanium coating of cold spraying or cold spraying cu coating；
The present invention has the advantages that：
1）Using the coating compactness of the light metal surface cold spraying coated workpieces after double-deck glow plasma permeating technical finesse
It greatly promotes, and forms one layer of diffusion layer between coating and substrate work-piece, substantially improve substrate work-piece and cold spraying
Bond strength between coating；
2）Due to the typicalness of research object, achievement in research will be generalized to other fields, and engineering value is also very prominent；
3）Previous research focus mostly in two-lime piles compared with (700 °C or more) under elevated operating temperature to high-melting-point huge sum of money metal surface
The work in terms of plating processing is carried out, the present invention has filled up two-lime piles and carried out table to light-alloy in low-temperature zone (600 °C or less)
The technology application blank of surface treatment.
Description of the drawings
Fig. 1 is two-lime piles cold spraying coating sealing of hole modification schematic diagram.
Specific implementation mode
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment, to this
Invention is further described.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.
Embodiment 1
The sealing of hole modification of the 2024 pure titanium coatings of aluminum alloy surface cold spraying
（1）Sample pre-treatment.By the pure titanium coating specimen surface alcohol washes of 2024 aluminum alloy surface cold sprayings and drying.
（2）It is fitted into double brightness plating stoves.It places pure titanium and oozes source, the pure titanium coating workpiece of 2024 aluminum alloy surface cold sprayings, adjust
Whole good interpolar is away from for 40mm.
（3）It vacuumizes.Air admission hole is closed, vacuum pump is opened, air pressure in stove is extracted into 10-1Pa is hereinafter, then pass to argon gas
To the operating air pressure of 40Pa.
（4）Plasma cleaning sample.Cooling water is opened, startup power supply first applies the pure titanium of 2024 aluminum alloy surface cold sprayings
Layer workpiece power supply opening, applies 500V voltages, utilizes the cold spray of 2024 aluminum alloy surface of beam-plasma pair caused by glow discharge
Apply pure titanium coating workpiece and carry out 30min or so bombardments, on the one hand sample is further cleaned, another aspect activating surface with
Convenient for the absorption of active atomic.
（5）Plating.After pre- bombardment, voltage 600V is applied to the source electrode of double brightness plating stoves, until micro- melt of pure titanium target material adjusts again
It is kept to 350 ~ 400V.The pure titanium coating workpiece voltage of 2024 aluminum alloy surface cold sprayings is then added to 700V, makes the temperature of sample
Then degree is adjusted to 600 ~ 650V up to 350 DEG C to keep temperature.
（6）Cooling.After keeping the temperature 3.5h, pure titanium target material source electrode power supply is cut off, the pure titanium of 2024 aluminum alloy surface cold sprayings is applied
Layer workpiece pole tension is turned down to 200V or so, and 2024 aluminum alloy surface cold spraying pure titanium coating workpiece pole is made to be put in faint glow
Electricity gradually cools down.
（7）It comes out of the stove.After specimen temperature is down to 200 DEG C or less, the pure titanium coating workpiece of 2024 aluminum alloy surface cold sprayings is cut off
Pole power supply closes Ar air valves, cuts off vacuum-pump power supply and cooling water.It opens vent valve and is filled with air, chamber pressure is restored to
Bonnet is opened after air pressure and takes out sample.
After above-mentioned two-lime piles sealing of hole modification, the pure titanium coating porosity of 2024 aluminum alloy surface cold sprayings by
8.43% is down to 0.98%, and ~ 2 μm of diffusion layer, pure titanium coating and 2024 aluminium alloys are formd between pure titanium coating and 2024 aluminium alloys
Binding force is promoted to 77.9N by 43.5N between matrix.
Embodiment 2
The sealing of hole modification of 2024 aluminum alloy surface cold spraying cu coatings
（1）Sample pre-treatment.By specimen surface alcohol washes and drying, it can first polish clean again when necessary.
（2）It is fitted into double brightness plating stoves.It places fine copper target and oozes source, 2024 aluminum alloy surface cold spraying cu coating works
Part adjusts interpolar away to 30mm.
（3）It vacuumizes.Air admission hole is closed, vacuum pump is opened, air pressure in stove is extracted into 10-1Pa is hereinafter, then pass to argon gas
To the operating air pressure of 30Pa.
（4）Plasma cleaning sample.Cooling water is opened, startup power supply first applies 2024 aluminum alloy surface cold spraying fine copper
Layer workpiece power supply opening, applies 400V voltages, utilizes the cold spray of 2024 aluminum alloy surface of beam-plasma pair caused by glow discharge
Apply cu coating workpiece and carry out 30min or so bombardment, on the one hand sample is further cleaned, another aspect activating surface with
Convenient for the absorption of active atomic.
（5）Plating.After pre- bombardment, fine copper target source voltage 650V will be applied, until target it is micro- it is molten adjusted again to 400 ~
450V is kept.2024 aluminum alloy surface cold spraying cu coating workpiece voltages are then added to 700V, make the temperature of sample up to 400
DEG C, it then adjusts to 550 ~ 650V to keep temperature.
（6）Cooling.After keeping the temperature 7h, source electrode power supply is cut off, 2024 aluminum alloy surface cold spraying cu coating workpiece are extremely electric
Pressure is turned down to 250V or so, so that workpiece pole be in faint glow and is discharged, gradually cools down.
（7）It comes out of the stove.After specimen temperature is down to 200 DEG C or less, 2024 aluminum alloy surface cold spraying cu coating workpiece are cut off
Pole power supply closes Ar air valves, cuts off vacuum-pump power supply and cooling water.It opens vent valve and is filled with air, chamber pressure is restored to
Bonnet is opened after air pressure and takes out sample.
Porosity is down to 0.53% by 6.71% after the sealing of hole modification of 2024 aluminum alloy surface cold spraying cu coatings, pure
~ 3 μm of diffusion layer is formd between copper coating and 2024 aluminium alloys, between cu coating and 2024 alloy matrix aluminums binding force by
31.3N being promoted to 65.1N.
Although embodiments of the present invention are described in detail, it should be understood that, without departing from the present invention's
In the case of spirit and scope, can embodiments of the present invention be made with various changes, replacement and change.
Claims (9)
1. a kind of sealing of hole method of modifying of light metal surface cold spraying coating, it is characterised in that：It is oozed using double-deck glow plasma
Plating stove carries out plating to workpiece prepared by light metal cold spraying coating, and one layer is formed between light metal matrix and cold spraying coating
Diffusion layer.
2. sealing of hole method of modifying according to claim 1, it is characterised in that：The specific steps are：By the cold spray of light metal surface
Coating layer same material target is put into vacuum chamber and is placed on source electrode, and light metal surface cold spraying coated workpieces are placed in adjustment below source electrode
Certain interpolar away from；After adjustment vacuum chamber reaches certain vacuum degree and is filled with argon gas to operating air pressure, to source electrode plus direct current negative electricity
Pressure makes in source electrode target micro- molten and keeps electric discharge sputtering state, then adds negative voltage to make to light metal surface cold spraying coated workpieces
Workpiece is warming up to technological temperature, and adjustment light metal surface cold spraying coated workpieces negative electricity is depressed into 200 ~ 750V held for some time；
Cool down later, come out of the stove to obtain the light metal surface cold spraying coated workpieces of sealing of hole modification.
3. sealing of hole method of modifying according to claim 2, it is characterised in that：The interpolar is away from for 10 ~ 50mm.
4. sealing of hole method of modifying according to claim 2, it is characterised in that：The pressure of the operating air pressure is 10 ~ 80Pa.
5. sealing of hole method of modifying according to claim 2, it is characterised in that：The voltage for adding negative DC voltage to source electrode
For 200 ~ 1000V.
6. sealing of hole method of modifying according to claim 2, it is characterised in that：The light metal surface cold spraying coated workpieces
It is 200 ~ 1000V to add the negative voltage of negative voltage.
7. sealing of hole method of modifying according to claim 2, it is characterised in that：The technological temperature is 200 ~ 900 DEG C.
8. sealing of hole method of modifying according to claim 2, it is characterised in that：The held for some time refer to heat preservation 0.5 ~
10h。
9. according to claim 1-8 any one of them sealing of hole method of modifying, it is characterised in that：The cold spraying coating is cold spray
Apply pure titanium coating or cold spraying cu coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563205.9A CN108796493B (en) | 2018-06-04 | 2018-06-04 | Hole sealing modification method for cold spraying coating on surface of light metal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563205.9A CN108796493B (en) | 2018-06-04 | 2018-06-04 | Hole sealing modification method for cold spraying coating on surface of light metal |
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| Publication Number | Publication Date |
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| CN108796493A true CN108796493A (en) | 2018-11-13 |
| CN108796493B CN108796493B (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810563205.9A Active CN108796493B (en) | 2018-06-04 | 2018-06-04 | Hole sealing modification method for cold spraying coating on surface of light metal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210178527A1 (en) * | 2019-12-13 | 2021-06-17 | Vast Glory Electronic & Hardware & Plastic (Hui Zhaou) Ltd | Welding method for manufacturing a heat sink structure |
| CN113293350A (en) * | 2021-05-26 | 2021-08-24 | 南京信息工程大学 | Titanium alloy surface modification method |
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|---|---|---|---|---|
| CN102154639A (en) * | 2011-03-10 | 2011-08-17 | 上海交通大学 | Aluminum-particle-based method for preparing coating by cold spray deposition |
| CN103255410A (en) * | 2013-04-24 | 2013-08-21 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of magnesium alloy corrosion resistant prevention coating |
| CN103882426A (en) * | 2014-03-14 | 2014-06-25 | 四川理工学院 | Preparation method of light metal and alloy surface composite coating thereof |
| CN106399914A (en) * | 2016-10-19 | 2017-02-15 | 昆明理工大学 | Method for eliminating porosity of sprayed coating |
| CN107761035A (en) * | 2017-11-07 | 2018-03-06 | 西安交通大学 | A kind of corrosion resistant fine and close thermal spray metal alloy coat and preparation method thereof completely |
-
2018
- 2018-06-04 CN CN201810563205.9A patent/CN108796493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154639A (en) * | 2011-03-10 | 2011-08-17 | 上海交通大学 | Aluminum-particle-based method for preparing coating by cold spray deposition |
| CN103255410A (en) * | 2013-04-24 | 2013-08-21 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of magnesium alloy corrosion resistant prevention coating |
| CN103882426A (en) * | 2014-03-14 | 2014-06-25 | 四川理工学院 | Preparation method of light metal and alloy surface composite coating thereof |
| CN106399914A (en) * | 2016-10-19 | 2017-02-15 | 昆明理工大学 | Method for eliminating porosity of sprayed coating |
| CN107761035A (en) * | 2017-11-07 | 2018-03-06 | 西安交通大学 | A kind of corrosion resistant fine and close thermal spray metal alloy coat and preparation method thereof completely |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210178527A1 (en) * | 2019-12-13 | 2021-06-17 | Vast Glory Electronic & Hardware & Plastic (Hui Zhaou) Ltd | Welding method for manufacturing a heat sink structure |
| CN113293350A (en) * | 2021-05-26 | 2021-08-24 | 南京信息工程大学 | Titanium alloy surface modification method |
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| CN108796493B (en) | 2020-11-06 |
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