CN103422088B - A kind of cold spray apparatus and method preparing 316L stainless steel coating - Google Patents
A kind of cold spray apparatus and method preparing 316L stainless steel coating Download PDFInfo
- Publication number
- CN103422088B CN103422088B CN201210161144.6A CN201210161144A CN103422088B CN 103422088 B CN103422088 B CN 103422088B CN 201210161144 A CN201210161144 A CN 201210161144A CN 103422088 B CN103422088 B CN 103422088B
- Authority
- CN
- China
- Prior art keywords
- powder
- stainless steel
- heater
- cold spray
- coating
- 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.)
- Expired - Fee Related
Links
Landscapes
- Nozzles (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of cold spray apparatus and the method for preparing 316L stainless steel coating, belong to cold spray technique field.This device mainly comprises Controlling System, powder feeder, gas heater, laval nozzle and powder heater; Wherein, described gas heater one end is connected with laval nozzle, and the other end connects powder feeder, described powder feeder one end connection control system, and the other end connects one end of powder heater, and the other end of powder heater is connected with laval nozzle; Prepare 316L stainless steel coating with this device, its processing parameter is: carrier gas preheating temperature 200 ~ 600 DEG C, spray distance 10 ~ 30mm, spray pressure 1.5 ~ 2.5MPa, powder feeding Heating temperature 200 ~ 500 DEG C.The present invention adopts the cold spray apparatus of improvement to heat powder feeder Stainless Steel Powder out, obtains being combined with matrix closely and fine and close stainless steel coating itself.
Description
Technical field
The present invention relates to cold spray technique field, be specifically related to a kind of cold spray apparatus and the method for preparing 316L stainless steel coating.
Background technology
Stainless steel has the advantages such as high temperature resistant, resistance to oxidation, anticorrosive and intensity and processibility be good compared with plain carbon stool and ferrous products, is widely used in the industrial circles such as oil, chemical industry, Sweet natural gas, automobile, food, instrument, valve, corrosion resistant pump, ocean.In addition, Stainless Steel Products smooth appearance, attractive in appearance, not easily to pollute, non-corrosive, be subject to the favor of people.Why " non-corrosive " is because add the elements such as the very strong chromium of solidity to corrosion, nickel to stainless steel.But being added in of precious metal is carried and is high performancely too increased cost, the stainless steel of especially some particular requirements, because the larger cost of precious metal add-on often increases several times than plain carbon stool simultaneously.
If imagination prepares stainless steel coating at carbon steel or other low cost ferrous products surface, just can reach simultaneously and reduce costs and obtain corrosion proof object.Researchist has been had to attempt adopting hot-spraying techniques to prepare stainless steel coating in steel product at present.Thermospray (comprising flame plating, electric arc spraying, plasma spraying, detonation flame spraying and high velocity fuel spraying (HVOF) etc.) is used widely.Their common features with high temperature, dusty spray are melted, and is bonded in workpiece surface forms coating with molten drop.Owing to inevitably there is certain oxidation in preparation process, cause the composition of coating and performance comparatively block stainless steel also there is a certain distance.
Cold spraying (also known as cold air power spraying and coating) makes it under completely solid-state with high velocity collision substrate with compressed gas-driven metallics, makes particle that a kind of novel spraying technology of violent viscous deformation and formation of deposits coating occur.Cold spraying has the feature of solid deposited under low temperature, significantly can reduce and eliminate the disadvantageous effect such as oxidation, phase transformation, segregation, residual tension and grain growth in traditional thermospray even completely, is subject to academia and industry member is more and more paid close attention to.
In recent years, had thermospray to comprise electric arc spraying, supersonic spray coating and high energy differential of the arc deposition and prepared the report of stainless steel coating, institute obtains product not only advantage of lower cost, while performance be also substantially provided with stainless feature.In addition, early stage somebody adopts laser multi-track overlapping legal system for stainless steel coating, but performance is relatively poor.India scientific research personnel G.Sundararajan etc. adopt cold spray technique to prepare SS316L stainless steel coating, but coating quality is not high, and the interface of coating and matrix exists obvious hole, and coating itself is not fine and close yet; They have carried out thermal treatment to increasing the density of coating 400 DEG C, 800 DEG C and 1100 DEG C to cold spraying stainless steel coating, but effect is not remarkable.In addition, other prepares stainless steel coating report about cold spray technique is not seen.
Summary of the invention
The object of this invention is to provide a kind of cold spray apparatus and the method for preparing 316L stainless steel coating, solve the problem of the coating quality difference existed when existing hot-spraying techniques prepares stainless steel coating, simultaneously comprehensive plain carbon stool and ferrous products low cost and stainless high-performance, reach under the prerequisite of guaranteed performance, the object simultaneously reduced costs.
For achieving the above object, the technical solution used in the present invention is:
Prepare a cold spray apparatus for 316L stainless steel coating, this device comprises Controlling System, powder feeder, gas heater, laval nozzle and powder heater; Wherein, described gas heater one end is connected with laval nozzle, and the other end connects powder feeder, described powder feeder one end connection control system, and the other end connects one end of powder heater, and the other end of powder heater is connected with laval nozzle.
Described gas heater and laval nozzle junction and powder heater and laval nozzle junction are respectively equipped with temperature sensor, the temperature of gas heater and powder heater heating feeds back in Controlling System by temperature sensor respectively, so that monitoring in real time and regulation and control.
The power of described powder heater and gas heater is regulated by Controlling System.
Utilize above-mentioned cold spray apparatus to prepare the cold spray-coating method of 316L stainless steel coating, the processing parameter of the method is as follows: carrier gas Heating temperature 200 ~ 600 DEG C, spray distance 10 ~ 30mm, spray pressure 1.5 ~ 2.5MPa, powder feeding Heating temperature 200 ~ 500 DEG C.
Spray material selects-400 ~-500 object 316L Stainless Steel Powders, and spraying body material can select plain carbon stool (as 45# steel, A3 steel etc.) or cast iron.
Before spraying, matrix first should use acetone, ethanol oil removing, then carries out sandblasting roughening treatment with 24 object white fused aluminas.
The object of the invention is to obtain the coating that defect is few, quality is high, need to formulate a whole set of rational processing parameter.Although make the speed of particle increase to gas carrier heating energy, thus increase the kinetic energy of particle to such an extent as to be more prone to combine with matrix, the too high meeting of carrier gas temperature causes the grain growth of powder particle inside, worsens the performance of sprayed particle; Meanwhile, spraying particle can be made to melt in spray gun, block spray gun.Certainly, gas temperature can not be too low, otherwise be unfavorable for the acceleration of sprayed particle.When gas temperature reduces, spraying particle be made to deposit, need to increase gaseous tension, and gaseous tension be limited to the ability of equipment.Therefore, when carrier gas temperature and gaseous tension all cannot improve further, improve cold spray apparatus, increase powder feeding well heater, to dusty spray direct heating, to increase the ability of its viscous deformation, the cold spray process optimization of certain material is seemed most important.Increase powder feeding well heater, in cold spray process, utilize thermal source directly to carry out powder heating the compactness that greatly can increase coating, effectively reduce the defects such as the hole in coating, significantly improve the quality of coating.This mainly relies on carrier gas to heat more to be conducive to the softening of powder because directly add ratio of specific heat to powder, thus increases the tendency of its viscous deformation, improves the quality of coating.
The present invention adds powder feeding well heater on traditional cold spray apparatus, the same with the principle of work of traditional cold spraying equipment, and the cold spray apparatus after improvement, operationally still based on aerodynamic principle, utilizes high pressure gas (He, N
2, mixed gas or air) carry powder particle after shaped telescopic tube, produce supersonic speed two-phase flow, at complete solid-state lower shock matrix, be deposited on by larger plastic flow deformation on matrix surface and form coating.Spray gun utilizes Laval nozzle principle design.In spraying process, when the speed of particle exceedes its corresponding critical velocity, after particle encounter, be deposited on matrix surface, form coating; Otherwise, erosion phenomenon will be there is.
The present invention has following beneficial effect:
1, Novel cold spraying equipment of the present invention utilizes pressurized air powder feeding and accelerates powder, and driving gas and carrier gas are provided by the air compressor machine of peak pressure 3.0MPa.Novel cold spraying equipment has two well heaters: a place heats carrier gas, the effect can played pre-heating powder and carrier gas expansion is accelerated; Another place, between powder feeder and Laval nozzle, to the powder direct heating that powder feeder is sent, plays softening powder, improves the effect of plastic deformation of powders ability, also indirect heating carrier gas, promote the effect of gas expansion and powder quick.Spray gun is vertically fixed on support; Sample is relative spray gun motion on X-Y two-dimension moving platform.
2, cold spray process temperature of the present invention is well below its melting point, and generally getting 1/3rd of fusing point is the temperature that carrier gas is heated.After adding powder feeding well heater, in spraying process, instantaneously the powder sprayed from powder feeder can be heated to the temperature of setting, generally be no more than the temperature of carrier gas heating.Equipment is equipped with temperature sensor the temperature of carrier gas heating and powder feeding heating to be fed back on controller respectively, can monitors in real time and regulate and control.
3, the present invention is by the improvement to cold spray apparatus, add powder heater, powder feeder Stainless Steel Powder is out heated, to reach softening powder, increases the ability of its viscous deformation, obtain being combined high quality stainless steel coating that is tight and densification itself with matrix, and by the method that powder feeding is heated, adopt cold spraying one step just can obtain high-quality coating, eliminate follow-up thermal treatment, namely save operation and again reduce cost, have a wide range of applications.
Accompanying drawing explanation
Fig. 1 is cold spray apparatus structural representation of the present invention; Mark in figure: 1-Controlling System, 2-gas heater, 3-worktable, 4-deLavel spray gun, 5-powder heater, 6-powder feeder.
Fig. 2 is the SEM photo of cold spraying stainless steel coating and basal body interface in the embodiment of the present invention 1; Wherein: the interface topography of coatings and substrate when (a) carrier gas temperature is 500 DEG C;
The interface topography of coatings and substrate when b () powder feeding Heating temperature is 470 DEG C, carrier gas temperature is 500 DEG C;
The interface topography of coatings and substrate when () carrier gas temperature is 550 DEG C c;
The interface topography of coatings and substrate when d () powder feeding Heating temperature is 470 DEG C, carrier gas temperature is 550 DEG C;
The interface topography of coatings and substrate when () carrier gas temperature is 600 DEG C e;
The interface topography of coatings and substrate when f () powder feeding Heating temperature is 470 DEG C, carrier gas temperature is 600 DEG C.
Embodiment
As shown in Figure 1, at traditional cold spraying equipment, (application number: on basis 200410034941.3) increases a powder heater, adjusts suitable processing parameter, can prepare high-quality stainless steel coating in the present invention.As shown in Figure 1, this cold spray apparatus comprises Controlling System 1, powder feeder 6, gas heater 2, laval nozzle 4 and powder heater 5 to cold spray apparatus structure of the present invention; Described gas heater 2 one end is connected with laval nozzle 4, the other end connects powder feeder 6, powder heater 5 is set between powder feeder 6 and laval nozzle 4, use it can to heat the powder of stainless steel that powder feeder 6 is sent, make it soften and be easy to viscous deformation, after powder of stainless steel arrives deLaval spray gun, through convergent-divergent process, be more of value to and formed in conjunction with good coating.Spray gun is vertically fixed on support; Sample is relative spray gun motion on X-Y two-dimension moving platform.
Described gas heater 2 is respectively equipped with temperature sensor with laval nozzle 4 junction and powder heater 5 with laval nozzle 4 junction; Powder heater 5 is regulated by Controlling System 1 with the power of gas heater 2 and the pressure of compressed gas source; By regulating the power of powder heater, powder of stainless steel can be heated within the scope of room temperature ~ 500 DEG C, make powder deliquescing, but do not affect its mobility.
Below by way of specific examples to adopt invention increases powder feeding well heater cold spray apparatus and adopt traditional cold spray apparatus (application number: the 316L stainless steel coating quality 200410034941.3) prepared carries out comparative illustration.
Embodiment 1
Prepare 316L stainless steel coating with the cold spray apparatus that invention increases powder feeding well heater, spray material selects-400 ~-500 object 316L Stainless Steel Powders, and spraying base material is 45# steel.Concrete technology parameter is: nebulizer gas pressure is 2.0MPa, and carrier gas Heating temperature is 500 DEG C, and powder feeding Heating temperature is 470 DEG C, and spray distance is 20mm.
The SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (b).
Comparative example 1
Adopt traditional cold spray apparatus to prepare 316L stainless steel coating, spray material selects-400 ~-500 object 316L Stainless Steel Powders, and spraying base material is 45# steel.Concrete technology parameter is: nebulizer gas pressure is 2.0MPa, and carrier gas Heating temperature is 500 DEG C, and spray distance is 20mm.
The SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (a).
Embodiment 2
Difference from Example 1 is: carrier gas Heating temperature is 550 DEG C, and the SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (d).
Comparative example 2
Be with comparative example 1 difference: carrier gas Heating temperature is 550 DEG C, the SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (c).
Embodiment 3
Difference from Example 1 is: carrier gas Heating temperature is 600 DEG C, and the SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (f).
Comparative example 3
Be with comparative example 1 difference: carrier gas Heating temperature is 600 DEG C, the SEM photo of prepared cold spraying stainless steel coating and basal body interface is as shown in Fig. 2 (e).
The porosity that above-mentioned employing cold spray apparatus of the present invention prepares stainless steel coating and the porosity adopting traditional cold spray apparatus to prepare stainless steel coating contrast as shown in table 1.
Table 1
As can be seen from Fig. 2 and table 1, traditional cold spray apparatus 316L stainless steel coating prepared when powder feeding pressure is 2.0MPa is not fine and close, and the porosity of comparative example 2 is up to 6.01%; After traditional cold spraying equipment adds powder feeding well heater, the quality of the 316L stainless steel coating that the basis of original experiment parameter is prepared significantly improves, the interface of coating and matrix is without hole, and coating itself becomes fine and close, and porosity is less than 0.21%.When powder feeding Heating temperature be 470 DEG C, carrier gas Heating temperature be 600 DEG C time, the porosity of coating is minimum, is only 0.04%.
Claims (4)
1. prepare the cold spray-coating method of 316L stainless steel coating for one kind, it is characterized in that: the method adopts cold spray apparatus to prepare 316L stainless steel coating, and described cold spray apparatus mainly comprises Controlling System, powder feeder, gas heater, laval nozzle and powder heater; Wherein, described gas heater one end is connected with laval nozzle, and the other end connects powder feeder, described powder feeder one end connection control system, and the other end connects one end of powder heater, and the other end of powder heater is connected with laval nozzle;
Cold spray-coating method is adopted when utilizing described cold spray apparatus to prepare 316L stainless steel coating on spraying matrix, the method processing parameter is as follows: carrier gas Heating temperature 200 ~ 550 DEG C, spray distance 10 ~ 30mm, spray pressure 1.5 ~ 2.5MPa, powder feeding Heating temperature 470 DEG C; Spray material is-400 ~-500 object 316L Stainless Steel Powders.
2. the cold spray-coating method of preparation 316L stainless steel coating according to claim 1, it is characterized in that: described gas heater and laval nozzle junction and powder heater and laval nozzle junction are respectively equipped with temperature sensor, and the temperature of gas heater and powder heater heating feeds back in Controlling System by temperature sensor respectively.
3. the cold spray-coating method of preparation 316L stainless steel coating according to claim 1, is characterized in that: the power of described powder heater and gas heater is regulated by Controlling System.
4. the cold spray-coating method of preparation 316L stainless steel coating according to claim 1, is characterized in that: spraying body material is carbon steel or cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161144.6A CN103422088B (en) | 2012-05-22 | 2012-05-22 | A kind of cold spray apparatus and method preparing 316L stainless steel coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161144.6A CN103422088B (en) | 2012-05-22 | 2012-05-22 | A kind of cold spray apparatus and method preparing 316L stainless steel coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103422088A CN103422088A (en) | 2013-12-04 |
| CN103422088B true CN103422088B (en) | 2016-03-30 |
Family
ID=49647464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210161144.6A Expired - Fee Related CN103422088B (en) | 2012-05-22 | 2012-05-22 | A kind of cold spray apparatus and method preparing 316L stainless steel coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103422088B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559987A (en) * | 2018-07-02 | 2018-09-21 | 西安交通大学 | A kind of Mg alloy surface anticorrosion antiwear low-density composite structure coating and preparation method thereof |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561991B (en) * | 2014-12-26 | 2017-11-24 | 瑞安市博业激光应用技术有限公司 | Stainless steel base composite coating proprietary material for thin valve plate and preparation method thereof |
| CN106835114A (en) * | 2017-01-21 | 2017-06-13 | 中国人民解放军装甲兵工程学院 | A kind of cold spray apparatus and method repaired for copper propeller surface damage |
| BR112019020889A2 (en) * | 2017-04-06 | 2020-07-07 | Effusiontech Pty Ltd | spray deposition apparatus |
| CN107043931A (en) * | 2017-05-08 | 2017-08-15 | 中国科学院金属研究所 | A kind of material high flux preparation method and device based on solid deposited |
| CN108165974A (en) * | 2018-01-23 | 2018-06-15 | 西北有色金属研究院 | The method that sensing heating enhances low pressure cold spray-on coating and hard substrate combinating strength |
| CN108188401A (en) * | 2018-03-22 | 2018-06-22 | 顺德职业技术学院 | High-frequency induction heating assists cold spraying deposited metal 3D printing method and apparatus |
| IT201900001323A1 (en) * | 2019-01-30 | 2020-07-30 | Ima Spa | METHOD FOR THE REALIZATION OF A COMPONENT FOR A MACHINE FOR THE PRODUCTION AND / OR PACKAGING OF PHARMACEUTICAL PRODUCTS. |
| CN110145239B (en) * | 2019-05-20 | 2021-03-09 | 中国地质大学（北京） | Insert for drilling, roller bit, and method for machining insert for drilling |
| CN112663041A (en) * | 2020-12-02 | 2021-04-16 | 湖北超卓航空科技股份有限公司 | Cold spraying operation platform |
| CN112718282A (en) * | 2020-12-15 | 2021-04-30 | 国营芜湖机械厂 | Vacuum electric-sweeping supersonic speed deposition spray gun |
| CA3226221A1 (en) * | 2021-07-08 | 2023-01-12 | Samuel MCALPINE | Systems, methods, and compositions for corrosion resistant stainless steel coatings |
| CN113737169B (en) * | 2021-08-16 | 2024-05-14 | 江苏大学 | Electroplastic auxiliary cold spraying device and coating preparation method |
| CN114231966A (en) * | 2021-11-30 | 2022-03-25 | 中国科学院金属研究所 | Cold spraying copper-containing stainless steel coating with antibacterial and antiviral functions |
| CN114150306B (en) * | 2021-11-30 | 2022-10-14 | 中国科学院金属研究所 | Stainless steel coating with marine organism fouling resistance function and preparation method thereof |
| CN114653971B (en) * | 2022-03-30 | 2023-08-11 | 广东省科学院新材料研究所 | Hydrogen power metal solid deposition device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603008A (en) * | 2003-04-30 | 2005-04-06 | 中国科学院金属研究所 | Pneumatic powder spraying apparatus |
| CN1898025A (en) * | 2003-12-24 | 2007-01-17 | 浦项产业科学研究院 | Cold spray apparatus having powder preheating device |
| CN1958171A (en) * | 2005-10-31 | 2007-05-09 | 宝山钢铁股份有限公司 | Cold air dynamical spray-painting method and apparatus of delivering powder through down stream |
| CN101063205A (en) * | 2006-04-30 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for making composite steel plate with stainless steel wire coating simple steel |
-
2012
- 2012-05-22 CN CN201210161144.6A patent/CN103422088B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603008A (en) * | 2003-04-30 | 2005-04-06 | 中国科学院金属研究所 | Pneumatic powder spraying apparatus |
| CN1898025A (en) * | 2003-12-24 | 2007-01-17 | 浦项产业科学研究院 | Cold spray apparatus having powder preheating device |
| CN1958171A (en) * | 2005-10-31 | 2007-05-09 | 宝山钢铁股份有限公司 | Cold air dynamical spray-painting method and apparatus of delivering powder through down stream |
| CN101063205A (en) * | 2006-04-30 | 2007-10-31 | 宝山钢铁股份有限公司 | Method for making composite steel plate with stainless steel wire coating simple steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559987A (en) * | 2018-07-02 | 2018-09-21 | 西安交通大学 | A kind of Mg alloy surface anticorrosion antiwear low-density composite structure coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103422088A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103422088B (en) | A kind of cold spray apparatus and method preparing 316L stainless steel coating | |
| Amin et al. | A review on thermal spray coating processes | |
| CN110565087B (en) | Laser cladding synthetic ceramic phase reinforced cobalt-based cladding layer and preparation method thereof | |
| CN102154609B (en) | Preparation method of high-precision roller wear-resistant coating | |
| CN102560326B (en) | Thermal spraying device and method for manufacturing quasicrystalline coating | |
| US9328918B2 (en) | Combustion cold spray | |
| CN201620186U (en) | Novel low-temperature high-speed supersonic flame spraying device | |
| CN103184400B (en) | Nano ceramics compound spraying powder and preparation method thereof | |
| CN105779925B (en) | The method that supersonic flame spraying fore-put powder carries out laser melting coating | |
| CN106756717B (en) | Preparation method of high-strength wear-resistant copper-nickel-tin alloy coating | |
| CN106735229A (en) | A kind of screw rod and preparation method thereof | |
| CN108842126B (en) | Metal ceramic coating continuous casting crystallizer copper pipe and preparation method thereof | |
| CN109440049B (en) | Method for preparing amorphous aluminum coating by compounding electric arc spraying and laser remelting | |
| CN113529065B (en) | Method and device for preparing iridium metal coating based on cold spraying high-speed deposition additive manufacturing technology | |
| CN104087891B (en) | A kind of injection and spraying process prepare method and the device of composite material | |
| CN107419213B (en) | Surface anticorrosion method for metal matrix | |
| CN102162079A (en) | Low-oxygen-content high-yield spherical aluminum bronze alloy powder for thermal spraying and preparation method thereof | |
| WO2007091102A1 (en) | Kinetic spraying apparatus and method | |
| CN103537391B (en) | A kind of adjustable binary channels dust feeder | |
| CN104099608B (en) | The method of Cu-Ag-Zn abradable seal coating is prepared in a kind of cold spraying | |
| DE102004026490A1 (en) | Applying solder to a base material is carried out in a molten bath spraying, flame spraying, cold gas spraying, electric arc spraying or plasma spraying | |
| CN104357779A (en) | Iron-aluminum inter-metallic compound coating and spraying method thereof | |
| CN103820748A (en) | Technique for spraying cobalt-molybdenum-chrome-silicon coating on surface of thin-walled nickel-based alloy piece | |
| CN109518182A (en) | Die wear dressing method | |
| CN105256269A (en) | Spraying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| 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: 20160330 |