CN106676459A - Method for improving anti-fatigue performance of coating - Google Patents
Method for improving anti-fatigue performance of coating Download PDFInfo
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- CN106676459A CN106676459A CN201510741002.0A CN201510741002A CN106676459A CN 106676459 A CN106676459 A CN 106676459A CN 201510741002 A CN201510741002 A CN 201510741002A CN 106676459 A CN106676459 A CN 106676459A
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- coating
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- textured pattern
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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
- C23C4/18—After-treatment
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- 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 method provides a method for improving anti-fatigue performance of a coating. According to the method, through biological bionics simulation, textured patterns of different geometric appearances are prepared on the surface of the sprayed coating. By means of coating surface texturing, contact conditions can be changed due to differences in texturing pattern appearances, then change in contact force is caused, and the anti-fatigue performance of the coating can be effectively improved.
Description
Technical field
The present invention relates to sprayed on material technical field, and in particular to a kind of side of raising coating anti-fatigue performance
Method.
Background technology
Because spray-on coating itself has voidage of a relatively high, exist be mingled with, the defect such as fiber crack,
So that spray-on coating under arms during easily form Crack Extension, cause service life reduction.Existing surface is applied
The lifting of layer performance is mainly using secondary operation technologies such as laser remolten, surface peenings after coating formation,
Although lifting of these technological means to coating performance serves certain effect, macro property is in material
The exterior representations of portion's structure and quality, so these technologies can not be to forming fixing internal structure coating
Military service performance inherently have a distinct increment.
Supersonic Plasma Spraying technology can prepare the coating of thicker degree and quilt because of it on heavy parts
Practical Project field is widely used in, many middle material difference systems can be realized by plasma spraying technology
Coating, such as metal and alloy, ceramics, cermet and plastics, and spray-on coating also embodies
Different functions, such as wear-resisting, thermal boundary, conduction, radiation proof.But because spray-on coating has in itself
Voidage is of a relatively high, exist be mingled with, the defect such as fiber crack so that spray-on coating under arms during
Crack Extension is easily formed, causes service life reduction.
Texturing has been widely used in the research of antifriction antiwear, and by textured method
Jing realizes increasing substantially for the performance of material, and texturing can improve the main of material friction performance
Reason is, because it can store abrasive dust and lubricating oil, to provide friction surface continuous lubrication, but to spraying
Coating carries out texturing, changes contact conditions using texturing different-shape and improves the anti-of spray-on coating then
The research of fatigue behaviour is little.Surface Texture is a kind of bionical thing surface microstructure, changes surface geometry
Configuration, and then improve the process technology of mechanical system frictional behaviour.Surface Texture or fabrication patterning pass through
Various advanced surface microprocessings (reactive ion etching, shot blasting on surface process, electron beam lithography,
Mechanical miniature carving and laser surface processing), add in the structure of part (matrix) surface biomimetic thing specific function
Instrument has the small geometrical configuration (dot matrix) of specific aligned transfer, dimensional structure reducing two frictions
The effective contact area in face, especially because reducing frictional force and showing in material friction aspect of performance
Unique advantage.Therefore it is widely used in changing Part Surface Roughness, and then improves the resistance to of piece surface
Mill anti-fatigue performance.
The content of the invention
In order to improve the service life of coating, the performance of coating is extended, it is an object of the invention to provide
A kind of method for improving coating fatigue strength.
A further object of the present invention is that offer is a kind of can effectively improve knitting for spray-on coating anti-fatigue performance
Structure pattern.
In order to realize the purpose of the present invention, the invention provides a kind of method for improving coating anti-fatigue performance,
This method is simulated by bionics, and on spray-on coating surface the texture of different geometrical morphologies is prepared
Change pattern.The present invention is using textured method after spraying, it is desirable to can provide by texturing and persistently moisten
It is sliding, change the slip of rolling contact fatigue and then the contact fatigue property of observation coating, it is desirable to come with this
Optimization textured pattern, extends the military service performance of coating.
Specifically, the method for the present invention comprises the steps：
(1) matrix is sprayed using Supersonic Plasma Spraying method；
(2) texturing process is carried out to coating surface using laser process.
Preferably, the matrix in the method step (1) also includes cleaning grinding process.Described matrix is preferred
Stainless steel, specifically from FV520B.
Preferably, spraying parameter described in step (1) be spray voltage 120V, spraying current 440A,
Spray power 55kW, spray distance 100mm.The selected coating of spraying is NiCrBSi ceramic coatings,
Supersonic Plasma Spraying obtains the spray-on coating that thickness is 100 microns, wherein NiCrBSi powder
Granularity be 50-60 microns.
Preferably, the specific process parameter of laser process is in step (2)：Laser power is 80-120W,
Surface sweeping speed is 600-900mm/s, and frequency is 15-25HZ.By controlling the energy of laser to control
Select the depth of texture, by laser texturing method can obtain certain size, certain density it is regular
Textured pattern.
Laser used by the present invention is pulse laser, and energy and processing number of times used decides texturing figure
The depth of case, the drawing software carried by system can be pressed required certain size definite shape
Draw in advance according to the textured pattern of a determining deviation, then specimen surface is processed, can obtain
The textured pattern of fine size structure.
Further, the invention provides a kind of texture that can effectively improve spray-on coating anti-fatigue performance
Change pattern.The pattern includes the combination of any geometrical pattern or several geometrical patterns, such as circle, triangle,
One or more of hexagon, ditch flute profile, grid-shaped, arrow-shaped or stripe-shaped.
It is furthermore preferred that the textured pattern is arrow-shaped.
It is furthermore preferred that the density of the textured pattern is more than 0%, and less than 50%；Texturing figure
Case is density in the area ratio shared by matrix or coating surface.
Beneficial effects of the present invention are as follows：
The coating surface texturing of the present invention, because the difference of textured pattern pattern can change contact conditions,
Then cause the change of contact force, the anti-fatigue performance of coating can be effectively improved.
Description of the drawings
The textured pattern that the floating coat surface of Fig. 1 embodiment of the present invention 1 is carried out；
The fatigue strength of coating under Fig. 2 coating surface difference texture shapes of the present invention；
The fatigue behaviour of coating under Fig. 3 difference stripe angles.
Specific embodiment
By the following examples further describing beneficial effects of the present invention, it should be understood that these
Embodiment is only used for the purpose of illustration, is never limited in protection scope of the present invention.
Embodiment 1 prepares textured coating
The first step：
Carry out cleaning grinding process to matrix first, the preferred stainless steel of described matrix is concrete to select
FV520B。
Second step：
Matrix is sprayed using Supersonic Plasma Spraying method
Efficient GTV F6 plasma spray of the spraying equipment from the total institute of mining and metallurgy research in described step (3)
Automatic doubler surface glouer, spraying parameter be spray voltage 120V, spraying current 440A, spray power 55kW,
Spray distance 100mm.Finally obtain certain thickness coating.The selected coating of spraying is NiCrBSi
Ceramic coating, Supersonic Plasma Spraying obtains the spray-on coating that thickness is 100 microns, wherein
The granularity of NiCrBSi powder is 56 microns.
3rd step
Texturing process is carried out to coating surface using laser process
Laser power is 80W, and sweep speed is 600mm/s, and frequency is 20HZ, by laser texturing
Method can obtain depth for 60 microns, density is 30% textured pattern, and concrete pattern is：
Circular and stripe-shaped, hexagon, triangle, arrow-shaped, stripe-shaped, as shown in Figure 1.
Wherein stripe-shaped width is 50 microns, and spacing is 70 microns, as Figure 1-1；
Circle is combined with stripe-shaped, and stripe-shaped width is 50 microns, and fringe spacing is 70 microns, circular
It is evenly distributed in the middle of stripe-shaped texture, a diameter of 50 microns, as shown in Figure 1-2；
Arrow-shaped width is 60 microns, and width is the vertical range on two sides, and the spacing of each arrow is
70 microns, as Figure 1-3；
Hexagonal side length is 60 microns, and spacing is 70 microns, as Figure 1-4；
Triangle edges are a length of 95 microns, and two triangle base fixed point spacing are 70 microns, are not shown in figure
Go out.
Implement the comparative example of side 2
In the case of the identical conditional parameter of embodiment 1, applying without preparation spraying on textured matrix
Layer carries out Experimental comparison.
Embodiment 3 carries out rolling contact fatigue test to coating prepared by embodiment 1, and changes contact fatigue
Slip, observes the anti-fatigue performance of the coating under the conditions of different slips.
In order to measure the properties of coating, seen using Nova NanoSEM450 types SEM
Examine the geometrical morphology of texture after spraying.
In order to test impact of the different textured patterns to the anti-fatigue performance of spray-on coating, connect using rolling
Tactile fatigue tester is tested the fatigue behaviour of spray-on coating.
1st, under coating surface difference texture shape coating fatigue strength
For impact of the testing coating textured pattern to anchoring strength of coating, textured coating is carried out
Fatigue strength test, device therefor is conventional fatigue tester.Test result is as shown in Fig. 2 without texture
The bond strength of the coating surface of change is 500MPa, and the fatigue under coating surface different shape texture is strong
Degree, relative to without textured coating surface, there is textured pattern between 500MPa to 600MPa
Coating surface there is preferable fatigue resistance, and the fatigue strength of coating with the shape of textured pattern
And change, in the middle of selected figure, arrow-shaped texture has optimum fatigue strength, is 580MPa.
2nd, fatigue strength with arrow-shaped texture angle change
In order to test impact of the angle of arrow-shaped texture to coating fatigue strength, change sagittate angle,
Prepared arrow-shaped angle be 15 degree, 25 degree, 35 degree, 45 degree, to preparation different angles arrow
The pattern of shape carries out testing fatigue, and testing machine used is routine test machine.Test result as shown in figure 3,
For coating fatigue strength with arrow texture angle change, it can be seen that the fatigue strength of coating be with
Texturing angle and change, and texturing angle has an optimal value, when arrow texture angle is 35
When spending, the fatigue strength highest of coating.
The above is only the preferred embodiment of the present invention, it is noted that general for the art
For logical technical staff, on the premise of without departing from the technology of the present invention principle, some improvement can also be made
And retouching, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. it is a kind of improve coating anti-fatigue performance method, it is characterised in that this method is by biology
Bionics is simulated, and on spray-on coating surface the textured pattern of different geometrical morphologies is prepared.
2. the method for claim 1, it is characterised in that the method comprises the steps：
(1) matrix is sprayed using Supersonic Plasma Spraying method；
(2) texturing process is carried out to the coating surface obtained by step (1) using laser process.
3. method as claimed in claim 2, it is characterised in that the matrix in the method step (1)
Also include cleaning grinding process.
4. the method as described in claims 1 to 3 any one, it is characterised in that institute in step (1)
Spraying parameter is stated for spray voltage 120V, spraying current 440A, spray power 55kW, spraying
Apart from 100mm.
5. the method as described in claims 1 to 3 any one, it is characterised in that selected by the spraying
Coating be NiCrBSi ceramic coatings, Supersonic Plasma Spraying obtains the spraying that thickness is 100 microns
Coating, the wherein granularity of NiCrBSi powder are 50-60 microns.
6. the method as described in claims 1 to 3 any one, it is characterised in that swash in step (2)
The specific process parameter of photoreduction process is：Laser power is 80-120W, and surface sweeping speed is 600-900mm/s,
Frequency is 15-25HZ.
7. the method as described in claims 1 to 3 any one, it is characterised in that described matrix is stainless
Steel.
8. a kind of textured pattern that can effectively improve spray-on coating anti-fatigue performance, it is characterised in that
The pattern includes the combination of any geometrical pattern or several geometrical patterns.
9. textured pattern as claimed in claim 8, it is characterised in that the textured pattern is circle,
One or more of triangle, hexagon, ditch flute profile, grid-shaped, arrow-shaped or stripe-shaped.
10. textured pattern as claimed in claim 9, it is characterised in that the textured pattern is
Arrow-shaped.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741002.0A CN106676459A (en) | 2015-11-04 | 2015-11-04 | Method for improving anti-fatigue performance of coating |
| US15/341,581 US20170121808A1 (en) | 2015-11-04 | 2016-11-02 | Method for enhancing anti-fatigue performance of coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510741002.0A CN106676459A (en) | 2015-11-04 | 2015-11-04 | Method for improving anti-fatigue performance of coating |
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| Publication Number | Publication Date |
|---|---|
| CN106676459A true CN106676459A (en) | 2017-05-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510741002.0A Pending CN106676459A (en) | 2015-11-04 | 2015-11-04 | Method for improving anti-fatigue performance of coating |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04107254A (en) * | 1990-08-29 | 1992-04-08 | Ohbayashi Corp | Method of application of lining to concrete |
| CN1670237A (en) * | 2005-04-07 | 2005-09-21 | 天津大学 | Plasma spraying method for improving fatigue performance of welded structure |
| CN102418064A (en) * | 2011-12-09 | 2012-04-18 | 北京科技大学 | Method for preparing TiAl-Nb composite coating with liquid zinc corrosion resistance through supersonic spray ing |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN104357792A (en) * | 2014-11-14 | 2015-02-18 | 北京矿冶研究总院 | Titanium alloy high-temperature oxidation-resistant fretting wear-resistant coating material, coating and preparation method |
-
2015
- 2015-11-04 CN CN201510741002.0A patent/CN106676459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04107254A (en) * | 1990-08-29 | 1992-04-08 | Ohbayashi Corp | Method of application of lining to concrete |
| CN1670237A (en) * | 2005-04-07 | 2005-09-21 | 天津大学 | Plasma spraying method for improving fatigue performance of welded structure |
| CN102418064A (en) * | 2011-12-09 | 2012-04-18 | 北京科技大学 | Method for preparing TiAl-Nb composite coating with liquid zinc corrosion resistance through supersonic spray ing |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN104357792A (en) * | 2014-11-14 | 2015-02-18 | 北京矿冶研究总院 | Titanium alloy high-temperature oxidation-resistant fretting wear-resistant coating material, coating and preparation method |
Non-Patent Citations (2)
| Title |
|---|
| 李国禄等: "等离子喷涂NiCrBSi涂层接触疲劳过程中残余应力变化规律研究", 《机械工程学报》 * |
| 赵文杰等: "赵文杰等", 《摩擦学学报》 * |
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Application publication date: 20170517 |
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