CN206368194U - Coating preparation facilities based on spark discharge - Google Patents
Coating preparation facilities based on spark discharge Download PDFInfo
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- CN206368194U CN206368194U CN201621260764.5U CN201621260764U CN206368194U CN 206368194 U CN206368194 U CN 206368194U CN 201621260764 U CN201621260764 U CN 201621260764U CN 206368194 U CN206368194 U CN 206368194U
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- pole target
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Abstract
The utility model is related to coat preparing technology field, and particularly a kind of coating preparation facilities based on spark discharge, the device includes：High velocity air generating means, the positive pole target and negative pole target for being arranged on the matrix material of high velocity air generating means air flow outlet, being symmetricly set between high velocity air generating means air stream outlet and matrix material, positive pole target, negative pole target are connected with the pulse power and servo-control system respectively.The high temperature energy that device overall structure of the present utility model can be produced by electric spark method makes target local melting and gasification, and make the material high speed impact of fusing and gasification in substrate material surface using swiftly flowing inert gas, final cooled and solidified, form the coating that thickness is 10 500 μm, preparation cost is relatively low, efficiency is higher, suitable further genralrlization application.
Description
Technical field
The utility model is related to the structure-design technique field of coating preparation facilities, is based on more specifically to one kind
The coating preparation facilities of spark discharge.
Background technology
In modern industry production, metal material is widely used in mould production, due in hot environment, die steel
Material surface is easily corroded and wearability changes significantly, therefore protective coating is prepared on die steel material surface, and will
Seek this coating there is high temperature resistant, anti-oxidant and anti impact wear-proof characteristic.Domestic and foreign scholars are entered for surface of hot die steel
Row processing research method be mainly：Surface carries beam heat treatment and physical vapour deposition (PVD), chemical vapor deposition, laser reinforcing etc.
New Surface Strengthening Techniques.Wherein, surface, which carries beam heat treatment, includes plasma spray technology, and the technical performance is excellent, and coating combines strong
Degree is higher, and fine and close, and abrasion resistance properties are superior, and application prospect is good, but cost is higher, and flexibility is poor；Laser reinforcing table
The advantage of surface technology is to result in the coating for forming good metallurgical binding with metal, and consistency is higher, but main skill
Art defect is that coating has higher crack sensitivity.
Electric spark deposition technology is the emerging technology developed rapidly the nearly more than ten years, and the technology includes：Formed between the electrodes
Pulse current, moment release spark, produce high temperature, to matrix surface and matrix material are combined into face coat by electrode melting,
Gained coating has good red hardness and wearability, and cost is relatively low, and flexibility is stronger.At present, most of scholar use with
The drawbacks of matrix material is the way of electrode is coating purity to be made not high while melt metal level, so that corresponding performance meeting
Decline.Therefore, a kind of higher coating purity, anchoring strength of coating and mechanical property are developed and is preferably based on spark discharge
Coating preparation facilities be those skilled in the art's technical problem to be solved.
Utility model content
Technical problem to be solved in the utility model is：Based on coating purity present in existing surface-coating technology
It is not high, the problem of mechanical property is poor there is provided a kind of coating purity is higher, anchoring strength of coating and mechanical property preferably, processing
Efficiency is higher, processing cost is relatively low, suitable for the painting based on spark discharge of Machining Complicated Profile (such as surface of hot working die)
Layer preparation method and device.
The utility model solves the technical scheme that its technical problem used：A kind of painting based on above-mentioned spark discharge
The device of layer preparation method, the device includes：High velocity air generating means, it is arranged on high velocity air generating means air flow outlet
Matrix material, the positive pole target and negative pole target that are symmetricly set between high velocity air generating means air stream outlet and matrix material
Material, positive pole target, negative pole target are connected with the pulse power and servo-control system respectively.
Further limit, the high velocity air generating means includes：Air accumulator, the supercharging device being sequentially connected with air accumulator
With gases at high pressure shower nozzle.
Further limit, the target is cylinder body shape, and positive pole target and negative pole target are symmetrically set in the form of an array respectively
The outside on the downside of high velocity air generating means air stream outlet is put, positive pole target is 0.1-10mm with negative pole target gap.
Further limit, the target is bulk shape, positive pole target and negative pole target are symmetricly set on high velocity air hair
Between generating apparatus air stream outlet and matrix material, positive pole target is 0.1-10mm with negative pole target gap.
A kind of coating production based on spark discharge, the preparation method includes following process：
It will be connected respectively with pulse power positive pole negative pole as the positive pole target of electrode, negative pole target, and pass through servo control
System processed is at the uniform velocity moved, while keeping the distance required for positive pole target, negative pole target spark discharge, is used in discharge process
High velocity air is washed away to positive pole target, negative pole target region of discharge, makes what is produced by positive pole target, the electric discharge of negative pole target
High speed impact is in substrate material surface in the presence of high velocity air for the product of fusing and gasification, and then solidification, which is formed, has thickness
Coating.
Further limit, the target is the conductive material that resistivity is less than 1 Ω cm.
Further limit, described high-speed gas are one kind in nitrogen, helium, neon, argon gas, Krypton or xenon；Institute
The speed for the high-speed gas stated is 100-2000m/s；Described pulse power discharge current is 1-100A, and pulsewidth is 0.1-
10000 μ s, dutycycle is 1:10-10:1.
The technical solution of the utility model is that the high temperature energy produced by electric spark method makes target local melting gentle
Change, and the material high speed impact for making fusing and gasification using swiftly flowing inert gas is finally cooled down in substrate material surface
Solidification, forms the coating that thickness is 10-500 μm, and preparation cost is relatively low, efficiency is higher, specifically has the beneficial effect that：
(1) overall construction design of preparation facilities of the present utility model is relatively reasonable, may be such that preparation gained coating material
Both from target, realize target region of discharge with matrix material zero contacts, and can effectively ensure for preparing coating purity, improves and apply
Layer performance；
(2) overall construction design of preparation facilities of the present utility model causes user can be using high velocity inert gas to electricity
Pole region of discharge is washed away, and the material removal efficiency during spark discharge can be increased substantially, so as to further improve
The preparation efficiency of coating；Meanwhile, the material of fusing and gasification is in the presence of swiftly flowing inertia, and high-speed impact is in matrix table
Face can improve the binding ability of coating and matrix material；And inert gas effectively can occur without oxidation in protective coating region；
(3) target in preparation facilities of the present utility model can be any conductive material, make extensively so as to meet
With demand, when using array electrode, preparation efficiency can be increased substantially.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, required in being described below to embodiment
The accompanying drawing used, which is done, simply to be introduced, it should be apparent that, drawings in the following description are only some implementations of the present utility model
Example, for those of ordinary skill in the art, on the premise of work is not paid, can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is schematic diagram prepared by the coating of the present utility model based on spark discharge；
Fig. 2 schematic diagrams of the present utility model based on array electrode prepares coating；
Fig. 3 is the tomograph of a-quadrant in Fig. 2；
Fig. 4 is a-quadrant dash area mplifying structure schematic diagram in Fig. 2；
In figure, 1. positive pole targets, 2. negative pole targets, 3. pulse powers, 4. servo-control systems, 5. matrix materials, 61. storages
Gas tank, 62. supercharging devices, 63. gases at high pressure shower nozzles, 7.WC coatings, 8. bushing type fixtures, 9.TiN coatings.
Embodiment
Embodiment 1
As shown in figure 1, a kind of coating production based on spark discharge, the preparation method includes following process：
Target material is the block WC rods of cylinder, first using as the positive pole target 1 of electrode, negative pole target 2 respectively with arteries and veins
Rush the positive pole negative pole of power supply 3 to be connected, and positive pole target 1, negative pole target 2 is at the uniform velocity moved respectively by the control of servo-control system 4,
Distance required for keeping positive pole target 1, the spark discharge of negative pole target 2 simultaneously is 0.2mm, and open-circuit voltage is 200V, is being put
Positive pole target 1, the region of discharge of negative pole target 2 are washed away with high speed argon stream in electric process, makes by positive pole target 1, bear
Fusing that pole target 2 discharges and produced and the WC products of gasification in the presence of high velocity air high speed impact in surfacing
The surface of matrix material 5 of H13 hot die steels, then solidification forms the WC coatings 7 of 155 μ m thicks.
A kind of device of the coating production based on above-mentioned spark discharge, the device includes：High velocity air is filled
Put, be arranged on the matrix material 5 of high velocity air generating means air flow outlet, be symmetricly set on high velocity air generating means air-flow
Export matrix material 5 between positive pole target 1 and negative pole target 2, positive pole target 1, negative pole target 2 respectively with the pulse power 3
Connected with servo-control system 4.
In above-mentioned technical proposal, the high velocity air generating means includes：Air accumulator 61 and air accumulator 61 pass sequentially through pipe
The supercharging device 62 and gases at high pressure shower nozzle 63 of road connection；Positive pole target 1 or negative pole target 2 are that resistivity is less than 1 Ω cm
Conductive material；Target is bulk shape, and positive pole target 1 and negative pole target 2 are symmetricly set on high velocity air generating means air-flow
Between outlet and matrix material 5, the speed of the high speed argon gas is 1100m/s；Pulse power discharge current is 50A, arteries and veins
A width of 100 μ s, dutycycle is 1:10.
Hardness test is carried out to above-mentioned WC coatings 7 after the completion of experiment, it is 170HRC to draw coating average hardness, and H13 is warm
Make mould steel hardness for 54HRC, the hardness of coating is 3 times of matrix material hardness, and as a result surface proves this without obvious crackle
The method of kind can significantly improve the bearing capacity of material.Then tested using friction wear testing machine, friction pair is No. 300 sand
Paper, granularity is 200 μm, and load is 1kg, and mill journey is 600m, and coating abrasion volume is 1.6 × 10-2mm3, H13 hot die steels mill
It is 3.5 × 10 to damage volume-2mm3, coating abrasion performance is 2.2 times of matrix material, it was demonstrated that coating abrasion performance is greatly increased.
Embodiment 2
As shown in Fig. 2 a kind of coating production based on spark discharge, the preparation method includes following process：
Target material is the industrial pure titanium TA2 rod of cylindrical shape, and diameter 5mm, positive pole target 1 and negative pole target 2 are each altogether
Four TA2 rods are symmetricly set on the outside on the downside of high velocity air generating means air stream outlet in the form of an array respectively, such as Fig. 3 institutes
Show that (Fig. 3 show eight TA2 rods B, C, D, E and b, c, d, e and is symmetricly set in the form of an array at a high speed by bushing type fixture 8
Outside on the downside of air-stream generating device air stream outlet), the spacing between positive pole target 1 and negative pole target 2 is 0.3mm.Matrix
Material 5 is cylindric 45 steel, matrix material 5 is fixed by fixed rotating device and the speed using rotating speed as 60r/min at the uniform velocity
Rotation.
First using as the positive pole target 1 of electrode, negative pole target 2 respectively with the mutually isolated positive pole of four group pulse power supply 3
Negative pole is connected, and controls bushing type fixture 8 positive pole target 1, negative pole target 2 is at the uniform velocity moved respectively by servo-control system 4,
So that two TA2 rods facing each other can produce spark discharge, i.e., it can produce 4 electric discharges, open-circuit voltage in synchronization
For 300V, positive pole target 1, the region of discharge of negative pole target 2 are washed away with high speed high pure nitrogen air-flow in discharge process, made
By the TA2 products of positive pole target 1, the fusing that negative pole target 2 discharges and produced and gasification in the presence of high velocity air high-speed punching
Hit on the surface of matrix material 5 of cylindric 45 steel, then solidification forms the TiN coatings 9 of 40 μ m thicks.
A kind of device of the coating production based on above-mentioned spark discharge, the device includes：High velocity air is filled
Put, be arranged on the matrix material 5 of high velocity air generating means air flow outlet, be symmetricly set on high velocity air generating means air-flow
Export matrix material 5 between positive pole target 1 and negative pole target 2, positive pole target 1, negative pole target 2 respectively with the pulse power 3
Connected with servo-control system 4.
In above-mentioned technical proposal, the high velocity air generating means includes：Air accumulator 61 and air accumulator 61 pass sequentially through pipe
The supercharging device 62 and gases at high pressure shower nozzle 63 of road connection, between gases at high pressure shower nozzle 63 and bushing type fixture 8 and positive pole target 1
Insulating barrier is provided between negative pole target 2；Positive pole target 1 or negative pole target 2 are the conduction that resistivity is less than 1 Ω cm
Material；The speed of the high speed high pure nitrogen gas is 1500m/s, both can be as protection gas, while being also N in coating
Source；Pulse power discharge current is 60A, and pulsewidth is 200 μ s, and dutycycle is 1:5.
Micro-hardness testing is carried out to TiN coatings 9 after the completion of experiment, measured using HVS-1000 types microhardness testers, it is real
Loading 100g is tested, the microhardness protected at lotus time 10s, 10 μm of top layer is up to 1600HV, is the 5 of matrix hardness (269HV)
More than times, and surface is without obvious crackle, as a result proves that this method can effectively improve the bearing capacity of material；Then type is used
Number carry out wear test, sample rotating speed 200r/min, normal load 50N, mill for MM-200 types ring-block friction wear testing machine
Damage time 30min, wherein coating abrasion weightlessness 0.0011g, and matrix material weightlessness 0.0071g, it was demonstrated that wear-resisting after prepares coating
Property is greatly increased.
Claims (4)
1. a kind of coating preparation facilities based on spark discharge, it is characterised in that：The device includes：High velocity air is filled
Put, be arranged on the matrix material of high velocity air generating means air flow outlet, be symmetricly set on high velocity air generating means air-flow
Export matrix material between positive pole target and negative pole target, positive pole target, negative pole target respectively with the pulse power and servo
Control system is connected.
2. a kind of coating preparation facilities based on spark discharge according to claim 1, it is characterised in that：The high speed
Air-stream generating device includes：Air accumulator, the supercharging device and gases at high pressure shower nozzle being sequentially connected with air accumulator.
3. a kind of coating preparation facilities based on spark discharge according to claim 1, it is characterised in that：The target
For cylinder body shape, positive pole target and negative pole target are symmetricly set on high velocity air generating means air stream outlet in the form of an array respectively
The outside of downside, positive pole target is 0.1-10mm with negative pole target gap.
4. a kind of coating preparation facilities based on spark discharge according to claim 1, it is characterised in that：The target
For bulk shape, positive pole target and negative pole target be symmetricly set on high velocity air generating means air stream outlet and matrix material it
Between, positive pole target is 0.1-10mm with negative pole target gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621260764.5U CN206368194U (en) | 2016-11-22 | 2016-11-22 | Coating preparation facilities based on spark discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621260764.5U CN206368194U (en) | 2016-11-22 | 2016-11-22 | Coating preparation facilities based on spark discharge |
Publications (1)
| Publication Number | Publication Date |
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| CN206368194U true CN206368194U (en) | 2017-08-01 |
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ID=59390066
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621260764.5U Expired - Fee Related CN206368194U (en) | 2016-11-22 | 2016-11-22 | Coating preparation facilities based on spark discharge |
Country Status (1)
| Country | Link |
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| CN (1) | CN206368194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321916A (en) * | 2018-12-12 | 2019-02-12 | 常州大学 | A method of the raising coating binding force based on spark discharge |
-
2016
- 2016-11-22 CN CN201621260764.5U patent/CN206368194U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321916A (en) * | 2018-12-12 | 2019-02-12 | 常州大学 | A method of the raising coating binding force based on spark discharge |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170801 Termination date: 20181122 |