CN106521393A - Coating preparation method and device based on electric spark discharge - Google Patents
Coating preparation method and device based on electric spark discharge Download PDFInfo
- Publication number
- CN106521393A CN106521393A CN201611039714.9A CN201611039714A CN106521393A CN 106521393 A CN106521393 A CN 106521393A CN 201611039714 A CN201611039714 A CN 201611039714A CN 106521393 A CN106521393 A CN 106521393A
- Authority
- CN
- China
- Prior art keywords
- pole target
- target
- negative pole
- positive pole
- spark discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to the technical field of coating preparation, in particular to a coating preparation method and device based on electric spark discharge. The device comprises a high-speed airflow generating device, a base material, a positive pole target material and a negative pole target material, wherein the base material is arranged at an airflow outlet of the high-speed airflow generating device; the positive pole target material and the negative pole target material are symmetrically arranged between the airflow outlet of the high-speed airflow generating device and the base material; and the positive pole target material is connected with a pulse power source, and the negative pole target material is connected with a servo control system. According to the coating preparation method and device based on electric spark discharge, the target materials are locally fused and gasified through high-temperature energy generated through an electric spark method; by means of inert gas flowing at high speed, the fused and gasified materials are made to impact the surface of the base material at high speed and finally are cooled and solidified, and a coating with thickness ranging from 10 microns to 500 microns is formed; and the coating preparation method and device are low in preparation cost, high in efficiency and suitable for being further applied and popularized.
Description
Technical field
The present invention relates to coat preparing technology field, particularly a kind of coating production and dress based on spark discharge
Put.
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 will prepare protective coating on die steel material surface, and will
Ask this coating that there is the characteristic of high temperature resistant, antioxidation and anti impact wear-proof.Chinese scholars are entered for surface of hot die steel
The research method that row is processed is mainly：Surface carries beam heat treatment and physical vapour deposition (PVD), chemical vapor deposition, laser reinforcing etc.
New Surface Strengthening Techniques.Wherein, surface 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 relatively costly, and motility is poor；Laser reinforcing table
The advantage of surface technology is to be obtained in that the coating that good metallurgical binding is formed 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 that the nearly more than ten years develop rapidly, and the technology includes：Formed in-between the electrodes
Pulse current, moment release spark, produce high temperature, are combined into face coat to matrix surface and matrix material by electrode melting,
Gained coating has good red hardness and wearability, and cost is relatively low, and motility is stronger.At present, most of scholar adopt with
Matrix material for electrode way the drawbacks of be coating purity to be made not high, so as to corresponding performance meeting while melt metal level
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 production and device be those skilled in the art's technical problem to be solved.
The content of the invention
The technical problem to be solved in the present invention is：Based on coating purity present in existing surface-coating technology it is not high,
The poor problem of mechanical property, there is provided a kind of coating purity is higher, anchoring strength of coating and mechanical property preferably, working (machining) efficiency compared with
It is prepared by the relatively low coating based on spark discharge suitable for Machining Complicated Profile (such as surface of hot working die) of high, processing cost
Method and device.
The technical solution adopted for the present invention to solve the technical problems is：A kind of coating preparation side based on spark discharge
Method, the preparation method include following process：
Positive pole target as electrode, negative pole target are connected with pulse power positive pole negative pole respectively, 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 to be discharged and produced by positive pole target, negative pole target
The product of fusing and gasification high speed impact in the presence of high velocity air, in substrate material surface, then solidifies and is formed with thickness
Coating.
A kind of device of the coating production based on above-mentioned spark discharge, the device include：There is dress in high velocity air
Put, be arranged on the matrix material of high velocity air generating meanss air flow outlet, be symmetricly set on high velocity air generating meanss air-flow
Outlet and 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 connects.
Further limit, the high velocity air generating meanss include：The pressurizer that air accumulator and air accumulator are sequentially connected
With gases at high pressure shower nozzle.
Further limit, the target is conductive material of the resistivity less than 1 Ω cm.
Further limit, the target is cylinder body shape, and positive pole target and negative pole target are symmetrically set respectively in the form of an array
The outside on the downside of high velocity air generating meanss air stream outlet is put, positive pole target is 0.1-10mm with negative pole target gap.
Further limit, the target is bulk shape, and positive pole target and negative pole target are symmetricly set on high velocity air and send out
Between generating apparatus air stream outlet and matrix material, positive pole target is 0.1-10mm with negative pole target gap.
Further limit, described high-speed gas are the one kind in nitrogen, helium, neon, argon, Krypton or xenon；Institute
The speed of 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 scheme is that the high temperature energy produced by electric spark method makes target local melting and gasification, and
The material high speed impact of fusing and gasification is made in substrate material surface using swiftly flowing noble gases, final cooled and solidified,
The coating that thickness is for 10-500 μm is formed, preparation cost is relatively low, efficiency is higher, specifically has the beneficial effect that：
(1) coating material in preparation method of the invention realizes target region of discharge and matrix material both from target
Zero contact of material, can effectively ensure for preparing coating purity, improve coating performance；
(2) technical scheme washed away to electrode discharge region using high velocity inert gas by preparation method of the invention,
The material removal efficiency during spark discharge can be increased substantially, so as to further improve the preparation efficiency of coating；Meanwhile,
In the presence of swiftly flowing inertia, high-speed impact can improve coating and matrix material in matrix surface to the material of fusing and gasification
The binding ability of material；And noble gases energy effective protection coating area occurs without oxidation；
(3) target in preparation method of the invention can be any conductive material, widely use need such that it is able to meet
Ask, when using array electrode, preparation efficiency can be increased substantially.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples；
Fig. 1 is schematic diagram prepared by the coating based on spark discharge of the present invention；
The schematic diagram based on array electrode prepares coating of Fig. 2 present invention；
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 target, 2. negative pole target, the 3. pulse power, 4. servo-control system, 5. matrix material, 61. storages
Gas tank, 62. pressurizer, 63. gases at high pressure shower nozzles, 7.WC coatings, 8. bushing type fixture, 9.TiN coatings.
Specific 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 the positive pole target 1 as electrode, negative pole target 2 respectively with arteries and veins
Rush 3 positive pole negative pole of power supply 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,
The distance required for positive pole target 1,2 spark discharge of negative pole target is kept to be 0.2mm simultaneously, open-circuit voltage is 200V, is being put
Positive pole target 1,2 region of discharge of negative pole target is washed away with high speed argon stream in electric process, make by positive pole target 1, bear
Fusing that pole target 2 discharges and produces and the WC products of gasification in the presence of high velocity air high speed impact in surfacing
5 surface of matrix material of H13 hot die steels, then solidification form 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 include：There is dress in high velocity air
Put, be arranged on the matrix material 5 of high velocity air generating meanss air flow outlet, be symmetricly set on high velocity air generating meanss air-flow
Outlet and 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
Connect with servo-control system 4.
In above-mentioned technical proposal, the high velocity air generating meanss include：Air accumulator 61, and air accumulator 61 pass sequentially through pipe
The pressurizer 62 of road connection and gases at high pressure shower nozzle 63；Positive pole target 1 or negative pole target 2 are resistivity 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 meanss air-flow
Between outlet and matrix material 5, the speed of the high speed argon gas is 1100m/s；Pulse power discharge current be 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, is shown that coating average hardness is 170HRC, and H13 is warm
Make mould steel hardness for 54HRC, 3 times of material hardness based on the hardness of coating, 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 are 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：
Industrial pure titanium TA2 rod of the target material for cylindrical shape, diameter 5mm, positive pole target 1 and negative pole target 2 are altogether respectively
Four TA2 rods are symmetricly set on the outside on the downside of high velocity air generating meanss air stream outlet respectively in the form of an array, such as Fig. 3 institutes
Show that (Fig. 3 is shown eight TA2 rod 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, by fixed rotary apparatuss matrix material 5 fix and speed with rotating speed as 60r/min at the uniform velocity
Rotation.
First using the positive pole target 1 as electrode, negative pole target 2 respectively with mutually isolated four group pulse power supplys, 3 positive pole
Negative pole is connected, and controlling bushing type fixture 8 by servo-control system 4 makes positive pole target 1, negative pole target 2 at the uniform velocity move respectively,
So that two facing each other TA2 rods can produce spark discharge, i.e., 4 electric discharges, open-circuit voltage can be produced in synchronization
For 300V, positive pole target 1,2 region of discharge of negative pole target is 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 produces and gasification in the presence of high velocity air high-speed punching
Hit on 5 surface of matrix material 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 include：There is dress in high velocity air
Put, be arranged on the matrix material 5 of high velocity air generating meanss air flow outlet, be symmetricly set on high velocity air generating meanss air-flow
Outlet and 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
Connect with servo-control system 4.
In above-mentioned technical proposal, the high velocity air generating meanss include：Air accumulator 61, and air accumulator 61 pass sequentially through pipe
The pressurizer 62 of road connection and gases at high pressure shower nozzle 63, between gases at high pressure shower nozzle 63 and bushing type fixture 8 and positive pole target 1
Insulating barrier is provided with and negative pole target 2 between；Positive pole target 1 or negative pole target 2 are conduction of the resistivity less than 1 Ω cm
Material；The speed of the high speed high pure nitrogen gas be 1500m/s, both can as shielding gas, while and in coating N come
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, is measured using HVS-1000 types microhardness testers, it is real
Loading 100g is tested, lotus time 10s is protected, the microhardness at 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 adopt type
Number wear test is carried out for MM-200 types ring-block friction wear testing machine, sample rotating speed 200r/min, normal load 50N, mill
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 (9)
1. a kind of coating production based on spark discharge, it is characterised in that：The preparation method includes following process：
Positive pole target as electrode, negative pole target are connected with pulse power positive pole negative pole respectively, and pass through SERVO CONTROL system
System is at the uniform velocity moved, while the distance required for positive pole target, negative pole target spark discharge is kept, with a high speed in discharge process
Air-flow is washed away to positive pole target, negative pole target region of discharge, makes the fusing produced by positive pole target, the electric discharge of negative pole target
In the presence of high velocity air, high speed impact, in substrate material surface, then solidifies and forms the painting with thickness with the product for gasifying
Layer.
2. a kind of coating preparation facilitiess based on spark discharge according to claim 1, it is characterised in that：The device bag
Include：High velocity air generating meanss, the matrix material for being arranged on high velocity air generating meanss air flow outlet, it is symmetricly set at a high speed
Positive pole target and negative pole target between air-stream generating device air stream outlet and matrix material, positive pole target, negative pole target difference
It is connected with the pulse power and servo-control system.
3. a kind of coating preparation facilitiess based on spark discharge according to claim 2, it is characterised in that：The high speed
Air-stream generating device includes：Pressurizer and gases at high pressure shower nozzle that air accumulator and air accumulator are sequentially connected.
4. a kind of coating preparation facilitiess based on spark discharge according to claim 2, it is characterised in that：The target
The conductive material of 1 Ω cm is less than for resistivity.
5. a kind of coating preparation facilitiess based on spark discharge according to claim 2, 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 meanss air stream outlet respectively in the form of an array
The outside of downside, positive pole target are 0.1-10mm with negative pole target gap.
6. a kind of coating preparation facilitiess based on spark discharge according to claim 2, 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 meanss air stream outlet and matrix material it
Between, positive pole target is 0.1-10mm with negative pole target gap.
7. a kind of coating preparation facilitiess based on spark discharge according to claim 1 and 2, it is characterised in that：It is described
High-speed gas be nitrogen, helium, neon, argon, Krypton or xenon in one kind.
8. a kind of coating preparation facilitiess based on spark discharge according to claim 1 and 2, it is characterised in that：It is described
High-speed gas speed be 100-2000m/s.
9. a kind of coating preparation facilitiess based on spark discharge according to claim 1 and 2, it is characterised in that：It is described
Pulse power discharge current be 1-100A, pulsewidth be 0.1-10000 μ s, dutycycle is 1:10-10:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039714.9A CN106521393B (en) | 2016-11-22 | 2016-11-22 | A kind of coating production and device based on spark discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039714.9A CN106521393B (en) | 2016-11-22 | 2016-11-22 | A kind of coating production and device based on spark discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106521393A true CN106521393A (en) | 2017-03-22 |
| CN106521393B CN106521393B (en) | 2018-10-19 |
Family
ID=58356177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611039714.9A Active CN106521393B (en) | 2016-11-22 | 2016-11-22 | A kind of coating production and device based on spark discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106521393B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108699703A (en) * | 2018-04-24 | 2018-10-23 | 深圳大学 | The preparation facilities and method of surface peening coating |
| CN109371397A (en) * | 2018-12-12 | 2019-02-22 | 常州大学 | A method of coating binding force is improved based on ultrasonic impact |
| CN113604770A (en) * | 2021-07-23 | 2021-11-05 | 常州大学 | Preparation method and device of rotary spraying integrated coating |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2151986Y (en) * | 1993-03-26 | 1994-01-05 | 员云星 | Closed acid cleaning device |
| RU2393067C1 (en) * | 2008-12-22 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" | Device for electric spark alloying |
| CN201762431U (en) * | 2010-05-21 | 2011-03-16 | 湖大海捷(湖南)工程技术研究有限公司 | Device for preparing super-hard abrasive particle layer by utilizing electric spark deposition method |
| CN102212775A (en) * | 2011-05-23 | 2011-10-12 | 华北水利水电学院 | Method for depositing WC (wolfram carbide) hard coating material on surface of flow passage component for electric desulfurization |
| CN102251206A (en) * | 2010-05-21 | 2011-11-23 | 湖大海捷(湖南)工程技术研究有限公司 | Electrospark deposition-based preparation method of diamond abrasive particle layer |
| CN103978276A (en) * | 2014-05-22 | 2014-08-13 | 哈尔滨工业大学 | Bipolar electrode device for electric spark hole machining for insulating ceramic material |
| CN204771007U (en) * | 2015-05-26 | 2015-11-18 | 南京航空航天大学 | Take thermal barrier coating metal parts's compound system hole device of abrasive water efflux electric spark |
| EP3061849A1 (en) * | 2015-02-25 | 2016-08-31 | United Technologies Corporation | Method for coating compressor blade tips |
-
2016
- 2016-11-22 CN CN201611039714.9A patent/CN106521393B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2151986Y (en) * | 1993-03-26 | 1994-01-05 | 员云星 | Closed acid cleaning device |
| RU2393067C1 (en) * | 2008-12-22 | 2010-06-27 | Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" | Device for electric spark alloying |
| CN201762431U (en) * | 2010-05-21 | 2011-03-16 | 湖大海捷(湖南)工程技术研究有限公司 | Device for preparing super-hard abrasive particle layer by utilizing electric spark deposition method |
| CN102251206A (en) * | 2010-05-21 | 2011-11-23 | 湖大海捷(湖南)工程技术研究有限公司 | Electrospark deposition-based preparation method of diamond abrasive particle layer |
| CN102212775A (en) * | 2011-05-23 | 2011-10-12 | 华北水利水电学院 | Method for depositing WC (wolfram carbide) hard coating material on surface of flow passage component for electric desulfurization |
| CN103978276A (en) * | 2014-05-22 | 2014-08-13 | 哈尔滨工业大学 | Bipolar electrode device for electric spark hole machining for insulating ceramic material |
| EP3061849A1 (en) * | 2015-02-25 | 2016-08-31 | United Technologies Corporation | Method for coating compressor blade tips |
| CN204771007U (en) * | 2015-05-26 | 2015-11-18 | 南京航空航天大学 | Take thermal barrier coating metal parts's compound system hole device of abrasive water efflux electric spark |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108699703A (en) * | 2018-04-24 | 2018-10-23 | 深圳大学 | The preparation facilities and method of surface peening coating |
| CN109371397A (en) * | 2018-12-12 | 2019-02-22 | 常州大学 | A method of coating binding force is improved based on ultrasonic impact |
| CN113604770A (en) * | 2021-07-23 | 2021-11-05 | 常州大学 | Preparation method and device of rotary spraying integrated coating |
| CN113604770B (en) * | 2021-07-23 | 2022-08-09 | 常州大学 | Preparation method and device of rotary spraying integrated coating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106521393B (en) | 2018-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lamraoui et al. | Laser surface texturing (LST) treatment before thermal spraying: A new process to improve the substrate-coating adherence | |
| CN110983328A (en) | Laser composite cold spraying high-speed deposition method and cold spraying equipment | |
| CN106521393A (en) | Coating preparation method and device based on electric spark discharge | |
| Kou et al. | On sustainable manufacturing titanium alloy by high-speed EDM milling with moving electric arcs while using water-based dielectric | |
| CA1154953A (en) | System and method for plasma coating | |
| Hu et al. | Flow field research on electrochemical machining with gas film insulation | |
| CN104451524B (en) | A kind of NiCrBSi coating production for minor diameter ball | |
| EP2834014B1 (en) | Titanium load-bearing structure and process for producing such | |
| PT2969298T (en) | Methods to improve hot workability of metal alloys | |
| CN112063962A (en) | Method for preparing uniform coating on surface of complex profile by PS-PVD | |
| CN110423988A (en) | A kind of electric arc ion plating device of configuration center impressed current anode | |
| CN206368194U (en) | Coating preparation facilities based on spark discharge | |
| US20150330221A1 (en) | Device for coating turbine components | |
| CN206033854U (en) | Laminar flow plasma surface of steel rail processing apparatus | |
| CN107058935A (en) | A kind of thermal spraying ring specimen frock clamp | |
| CN106637039A (en) | Steel rail surface treatment system using laminar plasma | |
| CN106513933A (en) | Improved wear-resisting plate surfacing machine | |
| CN211620614U (en) | Cold spraying equipment for high-speed deposition of laser composite cold spraying | |
| CN106167889B (en) | A kind of steel alloy face coat cladding method | |
| CN209798107U (en) | Wheel axle laser cladding molybdenum surface modification system | |
| CN107634178A (en) | Electrion processing unit for metal foil surface processing | |
| CN103255365B (en) | A kind of Mg alloy surface corrosion-proof wear coating and preparation method thereof | |
| CN108441861B (en) | Method and device for processing multilayer film by cluster electrode electric spark deposition | |
| ITRM970437A1 (en) | PROCEDURE FOR THE PRODUCTION OF THICK COATINGS ON COMPONENTS IN COPPER OR ITS ALLOYS | |
| CN206033855U (en) | Utilize surface of steel rail processing system of laminar flow plasma |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |