CN108914116A - A kind of method that laser melting coating assists electric jet stream deposition technique progress powder preset - Google Patents
A kind of method that laser melting coating assists electric jet stream deposition technique progress powder preset Download PDFInfo
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- CN108914116A CN108914116A CN201810785042.9A CN201810785042A CN108914116A CN 108914116 A CN108914116 A CN 108914116A CN 201810785042 A CN201810785042 A CN 201810785042A CN 108914116 A CN108914116 A CN 108914116A
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- powder
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Abstract
The present invention relates to a kind of laser melting coatings, and electric jet stream deposition technique to be assisted to carry out the preset method of powder, belongs to laser melting and coating technique field.Suspension will be made to fore-put powder in the present invention, suspension is placed in electric jet stream precipitation equipment, positive pole connects metal nozzle needle, cathode connects metal substrate, to form high voltage electric field between metal nozzle needle and metal substrate, under the action of electric field, orientation uniformly, controllably from metal nozzle needle to placing workpiece surface is on metallic substrates moved, is adsorbed suspension；Finally, make fore-put powder together with workpiece surface consolidation by the laser beam of high-energy-density again, to be formed and the good filling coating of workpiece surface metallurgical bonding, method of the invention is easy to operate, powder sort is adaptable, is suitable for complex-shaped workpieces, and it is formed by fore-put powder coating uniform, controllable, significantly improve process efficiency and quality.
Description
Technical field
The present invention relates to laser melting and coating technique fields, and in particular to a kind of electric jet stream deposition technique progress of laser melting coating auxiliary
The preset method of powder.
Background technique
Laser melting and coating technique is by adding cladding material in substrate material surface as a kind of material surface modifying technology
Material, and it is allowed to the consolidation together with substrate material surface thin layer using the laser beam of high-energy-density, to be formed and matrix surface smelting
The filling coating that gold is well combined.With energy density, high, basis material heat affecting and deformation are small, metallurgical bonding is strong for laser melting coating
Degree height is easy to carry out the advantages that microcell and constituency processing, and it is micro- to be widely used to the industries piece surface such as aviation, automobile, mold
It sees in structure and ingredient improvement.Melting and coating process can be divided by the difference of the addition manner according to cladding process coating material：In advance
Set coated laser cladding and synchronous powder feeding system laser melting coating.Wherein, preset coating laser melting coating is that cladding material is previously placed in base
The cladding position in body surface face makes heat through initialization layer surface layer then using high energy laser beam irradiation scanning by conduction of heat
Transmitting downwards melts entire initialization layer and matrix surface thin layer, to reach the mesh of preset coating and matrix formation metallurgical bonding
's.Preset cladding material is added in the form of powder, silk or plate, wherein the most commonly used in the form of a powder.
101158039 A of Chinese patent CN discloses one kind and obtains coating with pressed disc method fore-put powder progress laser melting coating
Method.But the method for Mechanical pressing is more demanding to the self-adhesive of powder, biggish pressure also can be to a certain extent
Destroy the proper property of cladding material and matrix surface.
102618868 A of Chinese patent CN disclose it is a kind of with extrusion fore-put powder carry out laser melting coating obtain it is compound
The method of coating.Whiting end fusion and adhesive solution are mixed into paste or paste by the method, and make it by fashion of extrusion
It is arranged successively with strip and is overlapped on substrate material surface, obtain laser melting coating initialization layer after overheat baking processing.But the method
Prolonged heat will be carried out after primary sprills of every completion are preset and dries dumping processing, and which increase process complexities and work
When, while dumping insufficient the defects of being also easy to make preset coating to generate stomata, be mingled with.
104775118 A of Chinese patent CN discloses a kind of method using the preset laser cladding powder of magnetic fields.This
Method will be placed in uniform magnetic field to cladding back of work, be sprayed cladding powder to cladding workpiece surface using electric spray gun, be made
Powder is adsorbed onto preset to cladding workpiece surface completion laser cladding powder under magnetic fields.But the method is only applicable to iron
The said magnetic powder materials such as base, Ni-based or cobalt-base alloys, for Al2O3、ZrO2It is difficult to be applicable in etc. common ceramic material.
To sum up, the existing method preset in workpiece surface progress powder still has narrow application range, complex process etc.
Problem, therefore, it is necessary to study a kind of new powder pre-setting methods, to solve the above problems.
Summary of the invention
For above-mentioned problems of the prior art, the present invention is intended to provide a kind of laser melting coating assists electric jet stream deposition
Technology carries out the preset method of powder.The characteristics of present invention is deposited using electric jet stream, the shape between metal substrate and metal nozzle needle
At electric field, to suspension made of preset powder under the action of electric field, orientation, uniformly, controllably from metal nozzle needle to putting
Set workpiece surface movement, absorption on metallic substrates；Finally, making fore-put powder and workpiece by the laser beam of high-energy-density again
Surface melting together, thus formed with the good filling coating of workpiece surface metallurgical bonding, method of the invention is easy to operate,
Powder sort is adaptable, is suitable for complex-shaped workpieces, and is formed by fore-put powder coating uniform, controllable, significantly mentions
High process efficiency and quality.
An object of the present invention is to provide a kind of method preset using electric jet stream deposition technique progress powder.
The second object of the present invention is to provide a kind of side that laser melting coating assists electric jet stream deposition technique to prepare filling coating
Method.
The third object of the present invention, which is to provide, carries out the preset method and laser melting coating of powder using electric jet stream deposition technique
Assist the application of the method for electric jet stream deposition technique preparation filling coating.
For achieving the above object, specifically, the invention discloses following technical proposals：
Firstly, carrying out the preset method of powder using electric jet stream deposition technique the invention discloses a kind of, including walk as follows
Suddenly：
(1) surface of workpiece is ground, polishing treatment, then removes workpiece surface dirt, it is spare；
(2) suspension will be made after mixing to fore-put powder, solvent, suspension is placed in electric jet stream precipitation equipment
In, positive pole connects metal nozzle needle, and cathode connects metal substrate, to form high-voltage electricity between metal nozzle needle and metal substrate
, workpiece is set on metal substrate, suspension sprays to form nanosized liquid droplets from the spray orifice of metal nozzle needle, and nanosized liquid droplets are in height
It is adsorbed under the action of piezoelectric field to cladding workpiece surface, controls metal nozzle needle and moved according to scheduled motion path and speed
It is dynamic, it completes workpiece and specifies the powder in region preset；
(3) workpiece in step (2) is subjected to hot baking processing, to evaporate solvent, formed final powder initialization layer to get.
In step (1), the method for the removal tool surface smut is：Cutter is successively ultrasonic in acetone and dehydrated alcohol
Clean 20min.
In step (2), it is described to fore-put powder include self-fluxing alloyed powder, metal-ceramic composite powder end, ceramic powders
Deng.
Preferably, in step (2), the fore-put powder partial size is less than 1 μm.
In step (2), the solvent includes：Dehydrated alcohol, methanol, deionized water etc..
In step (2), the jet velocity of the suspension is 1 × 10-12-1×10-10m3/s。
In step (2), the deposition thickness of the fore-put powder is 2-10mm.
In step (2), the internal diameter of the metal nozzle needle is 0.5mm.
In step (2), the voltage of the high voltage electric field is 0.1-10Kv.
In step (3), the temperature that the heat dries processing is 200-250 DEG C, time 1-2h.
Secondly, the invention also discloses a kind of method that laser melting coating assists electric jet stream deposition technique preparation filling coating,
Include the following steps：
1) powder is preset at workpiece surface using electric jet stream deposition technique of the present invention；
2) by workpiece laser irradiation in step 1), make fore-put powder together with workpiece surface consolidation to get.
In step 2), the laser is preferably CO2Laser.
In step 2), the laser parameter is：Power 100-200W, spot diameter 2-3mm, scanning speed 2-4mm/s take
Meet rate 30-50%.
Finally, the invention also discloses carry out the preset method of powder and laser melting coating auxiliary using electric jet stream deposition technique
Application of the method for electric jet stream deposition technique preparation filling coating in composite coating layer cutter preparation.
Compared with prior art, the beneficial effect that the present invention obtains is：The characteristics of present invention is deposited using electric jet stream, in gold
Belong to and form electric field between substrate and metal nozzle needle, to suspension made of preset powder under the action of electric field, orients,
It is even, controllably from metal nozzle needle to placing workpiece surface on metallic substrates move, adsorb；Finally, again by high-energy-density
Laser beam make fore-put powder together with workpiece surface consolidation, thus formed covered with the good filling of workpiece surface metallurgical bonding
Layer, method of the invention is easy to operate, powder sort is adaptable, is suitable for complex-shaped workpieces, and is formed by preset
Powder coating uniformly, controllably, significantly improves process efficiency and quality.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is schematic diagram of the present invention using electric jet stream precipitation equipment fore-put powder.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
It is existing to carry out the preset method of powder in workpiece surface and still have applicable model as background technique is introduced
The problems such as enclosing narrow, complex process, therefore, the invention proposes a kind of laser melting coating, to assist electric jet stream deposition technique to carry out powder pre-
The method set, the present invention is described further with reference to the accompanying drawings and detailed description.
Embodiment 1
The workpiece material that the present embodiment uses is Ti-6Al-4V alloy, fore-put powder Al2O3-TiO2Composite ceramics (its
Main component is 78.1%Al2O3, 16.62%TiO2, 2.17%Y2O3, 1.41%SiO2, 0.76%ZrO2, 0.37%Cr2O3,
0.23%Fe2O3, 0.2%Na2O, 0.14%CaO), solvent is dehydrated alcohol.
As shown in Figure 1, a kind of laser melting coating assists electric jet stream deposition technique to carry out the preset method of powder, including walk as follows
Suddenly：
(1) treat cladding surface ground, polishing treatment, and it is cleaned by ultrasonic in acetone and dehydrated alcohol respectively
20min, to remove the dirt of workpiece surface；
(2) fore-put powder and dehydrated alcohol are uniformly mixed to prepare suspension, suspension is placed in electric jet stream precipitation equipment
Flow pump in, positive pole connects metal nozzle needle, and cathode connects metal substrate, to be formed between metal nozzle needle and metal substrate
High voltage electric field sets Ti-6Al-4V alloy workpiece on metal substrate, and suspension sprays to form nanoscale from the spray orifice of metal nozzle needle
Drop, nanosized liquid droplets be adsorbed under the action of high voltage electric field Ti-6Al-4V alloy workpiece to cladding surface；Wherein,
For fore-put powder partial size less than 1 μm, the deposition thickness of fore-put powder is 4mm, and the voltage of high voltage electric field is the injection speed of 5Kv suspension
Degree is 4 × 10-12m3/ s, the internal diameter of metal nozzle needle are 0.5mm；
(3) by the Ti-6Al-4V alloy workpiece that deposited fore-put powder in step (2), heat dries processing 2h at 200 DEG C, with
Solvent is evaporated, powder initialization layer is obtained；
(4) CO is used2Laser carries out radiation treatment to the powder initialization layer in step (3), so that fore-put powder layer is into one
Step solidification, and with Ti-6Al-4V alloy workpiece skin layer consolidation to get；Wherein, laser parameter is：Power 200W, hot spot are straight
Diameter 3mm, scanning speed 3mm/s, overlapping rate 30%.
Embodiment 2
The workpiece material that the present embodiment uses for W6Mo5Cr4V2 high-speed steel, fore-put powder be hard alloy (its mainly at
It is divided into 80%WC, 10%Co, 5%W, 1.5%VC, 1%Cr3C2, 1%Ni, 1%Al, 0.5%Mo), solvent is dehydrated alcohol.
As shown in Figure 1, a kind of laser melting coating assists electric jet stream deposition technique to carry out the preset method of powder, including walk as follows
Suddenly：
(1) treat cladding surface ground, polishing treatment, and it is cleaned by ultrasonic in acetone and dehydrated alcohol respectively
20min, to remove the dirt of workpiece surface；
(2) fore-put powder and dehydrated alcohol are uniformly mixed to prepare suspension, suspension is placed in electric jet stream precipitation equipment
Flow pump in, positive pole connects metal nozzle needle, and cathode connects metal substrate, to be formed between metal nozzle needle and metal substrate
High voltage electric field sets W6Mo5Cr4V2 high speed steel workpiece on metal substrate, and suspension sprays to be formed from the spray orifice of metal nozzle needle to be received
Meter level drop, nanosized liquid droplets be adsorbed under the action of high voltage electric field W6Mo5Cr4V2 high speed steel workpiece to cladding table
Face；Wherein, for fore-put powder partial size less than 1 μm, the deposition thickness of fore-put powder is 4mm, and the voltage of high voltage electric field is 5Kv suspension
Jet velocity be 4 × 10-12m3/ s, the internal diameter of metal nozzle needle are 0.5mm；
(3) by the W6Mo5Cr4V2 high speed steel workpiece that deposited fore-put powder in step (2), hot baking is handled at 200 DEG C
2h obtains powder initialization layer to evaporate solvent；
(4) CO is used2Laser carries out radiation treatment to the powder initialization layer in step (3), so that fore-put powder layer is into one
Step solidification, and with Ti-6Al-4V alloy workpiece skin layer consolidation to get；Wherein, laser parameter is：Power 200W, hot spot are straight
Diameter 3mm, scanning speed 3mm/s, overlapping rate 30%.
Embodiment 3
A kind of method that laser melting coating assists electric jet stream deposition technique progress powder preset, with embodiment 1, difference is：
In step (2), the deposition thickness of the fore-put powder is 2mm, and the voltage of high voltage electric field is that the jet velocity of 0.1Kv suspension is
1×10-12m3/s.In step (3), the heat dries the time of processing and temperature is 250 DEG C, 1h.In step (4), the laser ginseng
Number is：Power 100W, spot diameter 2mm, scanning speed 2mm/s, overlapping rate 50%.
Embodiment 4
A kind of method that laser melting coating assists electric jet stream deposition technique progress powder preset, with embodiment 1, difference is：
In step (2), the deposition thickness of the fore-put powder is 2mm, and the voltage of high voltage electric field is that the jet velocity of 10Kv suspension is 1
×10-10m3/s.In step (3), the heat dries the time of processing and temperature is 220 DEG C, 1.5h.In step (4), the laser
Parameter is：Power 150W, spot diameter 3mm, scanning speed 4mm/s, overlapping rate 40%.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of carry out the preset method of powder using electric jet stream deposition technique, it is characterised in that：The method includes walking as follows
Suddenly：
(1) surface of workpiece is ground, polishing treatment, then removes workpiece surface dirt, it is spare；
(2) suspension will be made after mixing to fore-put powder, solvent, suspension will be placed in electric jet stream precipitation equipment, electricity
Source anode connects metal nozzle needle, and cathode connects metal substrate, so that high voltage electric field is formed between metal nozzle needle and metal substrate, by work
Part is set on metal substrate, and suspension sprays to form nanosized liquid droplets from the spray orifice of metal nozzle needle, and nanosized liquid droplets are in high voltage electric field
Under the action of be adsorbed to cladding workpiece surface, it is mobile according to scheduled motion path and speed to control metal nozzle needle, completes
Workpiece specifies the powder in region preset；
(3) workpiece in step (2) is subjected to hot baking processing, to evaporate solvent, formed final powder initialization layer to get.
2. as described in claim 1 carry out the preset method of powder using electric jet stream deposition technique, it is characterised in that：Step
(2) in, it is described to fore-put powder include self-fluxing alloyed powder, metal-ceramic composite powder end, ceramic powders；Preferably, described
Fore-put powder partial size is less than 1 μm.
3. as described in claim 1 carry out the preset method of powder using electric jet stream deposition technique, it is characterised in that：Step
(2) in, the solvent includes：Dehydrated alcohol, methanol, deionized water.
4. as described in any one of claims 1-3 carry out the preset method of powder using electric jet stream deposition technique, feature exists
In：In step (2), the jet velocity of the suspension is 1 × 10-12-1×10-10m3/s；
Or, the deposition thickness of the fore-put powder is 2-10mm in step (2)；
Or, the internal diameter of the metal nozzle needle is 0.5mm in step (2).
5. as described in any one of claims 1-3 carry out the preset method of powder using electric jet stream deposition technique, feature exists
In：In step (2), the voltage of the high voltage electric field is 0.1-10Kv.
6. as described in any one of claims 1-3 carry out the preset method of powder using electric jet stream deposition technique, feature exists
In：In step (3), the temperature that the heat dries processing is 200-250 DEG C, time 1-2h.
7. a kind of method that laser melting coating assists electric jet stream deposition technique preparation filling coating, it is characterised in that：The method packet
Include following steps：
1) powder is preset at workpiece surface using method described in any one of claims 1-6；
2) by workpiece laser irradiation in step 1), make fore-put powder together with workpiece surface consolidation to get.
8. the method that laser melting coating as claimed in claim 7 assists electric jet stream deposition technique preparation filling coating, feature exist
In：In step 2), the laser is CO2Laser.
9. the method that laser melting coating as claimed in claim 7 or 8 assists electric jet stream deposition technique preparation filling coating, feature
It is：In step 2), the laser parameter is：Power 100-200W, spot diameter 2-3mm, scanning speed 2-4mm/s, overlap joint
Rate 30-50%.
10. as claimed in any one of claims 1 to 6 carry out the preset method of powder using electric jet stream deposition technique and/or such as weigh
Benefit requires the described in any item laser melting coatings of 7-9 to assist the method for electric jet stream deposition technique preparation filling coating in composite coating knife
Application in tool preparation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550953A (en) * | 2018-12-06 | 2019-04-02 | 山东大学 | A kind of method that laser lithography-electrospray deposition prepares micro- texture |
| CN109836904A (en) * | 2018-12-28 | 2019-06-04 | 重庆新久融科技有限公司 | Aluminum alloy mould plate and preparation method thereof with scratch resistance nano coating |
| CN112144058A (en) * | 2020-09-24 | 2020-12-29 | 安徽中科春谷激光产业技术研究院有限公司 | Method for cladding tungsten carbide layer on surface of workpiece substrate |
| CN112877685A (en) * | 2021-01-14 | 2021-06-01 | 山东大学 | Micro-laminated film with high infrared reflectivity and preparation method thereof |
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