CN108715989A - A kind of preparation method of plasma spraying insulating coating - Google Patents
A kind of preparation method of plasma spraying insulating coating Download PDFInfo
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- CN108715989A CN108715989A CN201810529385.9A CN201810529385A CN108715989A CN 108715989 A CN108715989 A CN 108715989A CN 201810529385 A CN201810529385 A CN 201810529385A CN 108715989 A CN108715989 A CN 108715989A
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- insulating coating
- gas
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- spraying
- plasma
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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
- 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
- C23C4/134—Plasma spraying
-
- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
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- 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)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention relates to a kind of preparation methods of plasma spraying insulating coating, the transition zone of the coating spraying is nickel-bass alloy material, the insulating coating material of plasma spraying uses high purity aluminium oxide powder, using gas based on argon gas, the plasma spraying equipment of gas supplemented by hydrogen, described method includes following steps：Matrix is checked, is cleared up as required；The pre-heat treatment is carried out to matrix；By adjusting the gas flow of argon gas and hydrogen, changes the temperature and speed of plasma flame flow, by adjusting the gas flow of carrier gas, powder is sent to the center of flame stream, carrier gas flux 1-10NLPM, powder sending quantity 10-200g/min, spray distance 50-200mm.It can be used for the insulation protection on automobile industry electric elements surface.Being prepared using plasma spraying has dystectic insulating coating material.The characteristics of coating has a good insulation performance, and preparation technology of coating is simple, electric heating excellent insulation performance.
Description
Technical field
The invention belongs to field of surface treatment, are related to a kind of preparation method of plasma spraying insulating coating.
Background technology
Plasma spraying belongs to one kind of thermal spraying sufacing, is made using the plasma that anode and cathode arc discharge generates
For heat source, matrix formation coating is hit after accelerating sprayed on material by means of high speed plasma jet.The temperature height of plasma flame flow,
Energy is concentrated, and is very suitable for preparing various high-melting-point ceramic coatings.Melt granules deform fully when being collided with part, and coating causes
It is close, surfacing is smooth, high with the bond strength of matrix.Plasma spraying technology is the economy that piece surface is strengthened and protected in advance
And effective method, surface can be assigned with the multiple functions such as wear-resisting, anti-corrosion, resistance to high temperature oxidation, be widely used in aerospace, stone
Each industrial circle such as oily natural gas, steel.
In commercial Application, from simple exhaust ventilation to complicated, extra heavy high ferro motor-car, it is frequently run onto electricity
Erosion problem.Galvanic corrosion is that electric current flows through a kind of electrodisintegration form caused by the components such as bearing.When electric current flows through part, since electric discharge is made
With, the pitting that a large amount of diameters only have several microns can be formed in part surfaces externally and internally, will soon be failed due to abrasion, increase dimension
Accomplish this, or even causes huge economic losses.With the extensive use of frequency converter, the galvanic corrosion problems getting worse of part.In addition,
The resistance heater of new-energy automobile uses ptc material to heat under normal conditions at present, and heating region need to be reached with external environment
To very high-grade electrical isolation, if there is a certain amount of leakage current, resistance heater is possible to the feelings such as excess temperature occur, conduct
Shape causes resistance heater to collapse, and self-burning of vehicle is caused when serious.
In order to capture technical barrier present in application at present, developing can keep the attribute of material matrix itself special
Sign, moreover it is possible to the technology of electrical isolation protection be provided, there is very important practical significance.
Invention content
The purpose of the present invention is improve a kind of preparation of plasma spraying insulating coating of electric elements surface insulation performance
Method.The characteristics of coating has a good insulation performance, and preparation technology of coating is simple, electric heating excellent insulation performance.
The technical scheme is that so realize：A kind of preparation method of plasma spraying insulating coating, it is described etc.
Using being containing 99% or more high purity aluminium oxide powder, the grain size of alumina powder divides the coating of plasma spray insulating coating
Cloth range is between 5-90 μm.Being prepared using plasma spraying has dystectic insulating coating material.Transition zone is Ni-based conjunction
Golden material.There is the two good matched coefficients of thermal expansion, coating to have good bond strength.
The present invention can provide the method that plasma spraying prepares insulating coating, and this approach includes the following steps：
1. matrix is checked, is cleared up as required；
2. carrying out the pre-heat treatment to matrix；
3. using gas based on argon gas, gas supplemented by hydrogen.By adjusting the gas flow of argon gas and hydrogen, change plasma flame flow
Temperature and speed.If the gas flow of argon gas is 20-70 NLPM, the gas flow of hydrogen is 1-10 NLPM.Pass through electric current
The temperature of controllable plasma flame flow, electric current 300-600A.By adjusting the gas flow of carrier gas, powder is sent to flame stream
Center, carrier gas flux 1-10NLPM, powder sending quantity 10-200g/min.Spray distance is 50-200mm.Spraying 2-30 times, absolutely
The thickness of edge coating is 20-600 μm；
4. carrying out electrical insulation capability test to insulating coating, insulation resistance is more than 8G Ω, and anti-pressure resistance breakdown voltage is more than 5000V.
The present invention is mainly the insulation performance for solving the problems, such as electric vehicle appliance element surface.The coating compactness of preparation
Good, no cofusing particle is less, and electrical insulation capability is excellent.The excellent of the present invention is the reasonable science of the preparation method, easy to operate, easily
In implementation, convenient for large-scale production.
Specific implementation mode
A kind of preparation method of plasma spraying insulating coating, the coating of the plasma spraying insulating coating, which uses, is
Containing 99% or more high purity aluminium oxide powder, the particle size distribution range of alumina powder is between 5-90 μm.Using plasma
Prepared by spraying have dystectic insulating coating material.Matrix is nickel-bass alloy material.The present invention can provide plasma spray
The method that painting prepares insulating coating, this approach includes the following steps.
1. matrix is checked, is cleared up as required.
2. carrying out the pre-heat treatment to matrix using plasma flame flow.
3. using gas based on argon gas, gas supplemented by hydrogen.By adjusting the gas flow of argon gas and hydrogen, change flame passes
The temperature and speed of stream.If the gas flow of argon gas is 20-70 NLPM, the gas flow of hydrogen is 1-10 NLPM.Pass through electricity
Flow the temperature of also controllable plasma flame flow, electric current 300-600A.By adjusting the gas flow of carrier gas, powder is sent to flame
The center of stream, carrier gas flux 1-10NLPM, powder sending quantity 10-200g/min.Spray distance is 50-200mm.Spray 2-30
Time.
4. after the completion of spraying, the thickness for measuring insulating coating is 20-600 μm.
Electrical insulation capability test is carried out to insulating coating, insulation resistance is more than 8G Ω, and anti-pressure resistance breakdown voltage is more than
5000V.Metallographic Analysis is carried out to the insulating coating after spraying, coating porosity is in 0.5-12%.To the insulating coating after spraying
Micro-hardness testing is carried out, hardness number is in 300-1100 HV300.
Claims (8)
1. the transition zone of a kind of preparation method of plasma spraying insulating coating, the coating spraying is nickel-bass alloy material, etc.
The insulating coating material of plasma spray uses high purity aluminium oxide powder, using gas based on argon gas, the plasma spray of gas supplemented by hydrogen
Automatic doubler surface glouer, described method includes following steps：
Step 1：Matrix is checked, is cleared up as required；
Step 2：The pre-heat treatment is carried out to matrix；
Step 3：By adjusting the gas flow of argon gas and hydrogen, changes the temperature and speed of plasma flame flow, carried by adjusting
The gas flow of gas send the high purity aluminium oxide powder to the center of flame stream, carrier gas flux 1-10NLPM, and powder sending quantity is
10-200g/min, spray distance 50-200mm.
2. insulating coating according to claim 1, it is characterised in that：Coating material contains 99% or more high purity aluminium oxide
Powder, the particle size distribution range of alumina powder is between 5-90 μm.
3. the preparation method of insulating coating according to claim 2, it is characterised in that：If the gas flow of argon gas is 20-
The gas flow of 70 NLPM, hydrogen are 1-10 NLPM.
4. the preparation method of insulating coating according to claim 2, it is characterised in that：Pass through current regulation plasma flame flow
Temperature, electric current 300-600A.
5. the preparation method of insulating coating according to claim 2, it is characterised in that：Spraying 2-30 times, insulating coating
Thickness is 20-600 μm.
6. the preparation method of insulating coating according to claim 2, it is characterised in that：Insulating coating after spraying is carried out
Electrical insulation capability is tested, and insulation resistance is more than 8G Ω, and anti-pressure resistance breakdown voltage is more than 5000V.
7. the preparation method of insulating coating according to claim 2, it is characterised in that：Insulating coating after spraying is carried out
Metallographic Analysis, coating porosity is in 0.5-12%.
8. the preparation method of insulating coating according to claim 2, it is characterised in that：Insulating coating after spraying is carried out
Micro-hardness testing, hardness number is in 300-1100 HV300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529385.9A CN108715989B (en) | 2018-05-29 | 2018-05-29 | Preparation method of plasma spraying insulating coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529385.9A CN108715989B (en) | 2018-05-29 | 2018-05-29 | Preparation method of plasma spraying insulating coating |
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| CN108715989A true CN108715989A (en) | 2018-10-30 |
| CN108715989B CN108715989B (en) | 2020-11-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458453A (en) * | 2020-11-24 | 2021-03-09 | 安徽盈锐优材科技有限公司 | High-bonding-strength ceramic insulating coating and preparation method thereof |
| CN112553558A (en) * | 2020-11-20 | 2021-03-26 | 中机凯博表面技术江苏有限公司 | Preparation method of bearing surface insulating coating |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0827559A (en) * | 1994-07-14 | 1996-01-30 | Ishikawajima Harima Heavy Ind Co Ltd | Thermal insulation coating method |
| EP2251457A1 (en) * | 2002-05-24 | 2010-11-17 | Siemens Aktiengesellschaft | MCrAl coating |
| CN102691026A (en) * | 2011-03-21 | 2012-09-26 | 上海交运股份有限公司 | Resistance welding projection welding core rod and technology for spraying wearing layer on projection welding core rod |
| CN103540887A (en) * | 2013-10-14 | 2014-01-29 | 嘉兴职业技术学院 | Shaft-type part alumina powder plasma-spraying reparation method |
| CN104789914A (en) * | 2015-03-05 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Preparation method for bearing inner-outer ring electrical insulation coating |
| CN106947934A (en) * | 2017-05-09 | 2017-07-14 | 中国科学院兰州化学物理研究所 | A kind of plasma spraying prepares α Al2O3The method of coating |
-
2018
- 2018-05-29 CN CN201810529385.9A patent/CN108715989B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0827559A (en) * | 1994-07-14 | 1996-01-30 | Ishikawajima Harima Heavy Ind Co Ltd | Thermal insulation coating method |
| EP2251457A1 (en) * | 2002-05-24 | 2010-11-17 | Siemens Aktiengesellschaft | MCrAl coating |
| CN102691026A (en) * | 2011-03-21 | 2012-09-26 | 上海交运股份有限公司 | Resistance welding projection welding core rod and technology for spraying wearing layer on projection welding core rod |
| CN103540887A (en) * | 2013-10-14 | 2014-01-29 | 嘉兴职业技术学院 | Shaft-type part alumina powder plasma-spraying reparation method |
| CN104789914A (en) * | 2015-03-05 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Preparation method for bearing inner-outer ring electrical insulation coating |
| CN106947934A (en) * | 2017-05-09 | 2017-07-14 | 中国科学院兰州化学物理研究所 | A kind of plasma spraying prepares α Al2O3The method of coating |
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| 史月丽等: "《材料改性实验》", 31 August 2013, 中国矿业大学出版社 * |
| 胡传炘: "《表面处理技术手册》", 31 July 2009, 北京工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553558A (en) * | 2020-11-20 | 2021-03-26 | 中机凯博表面技术江苏有限公司 | Preparation method of bearing surface insulating coating |
| CN112458453A (en) * | 2020-11-24 | 2021-03-09 | 安徽盈锐优材科技有限公司 | High-bonding-strength ceramic insulating coating and preparation method thereof |
| CN112458453B (en) * | 2020-11-24 | 2023-09-15 | 安徽盈锐优材科技有限公司 | Ceramic insulating coating with high bonding strength and preparation method thereof |
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| Publication number | Publication date |
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| CN108715989B (en) | 2020-11-13 |
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