CN110231221A - A kind of test method of hot-spraying coating mechanical property - Google Patents
A kind of test method of hot-spraying coating mechanical property Download PDFInfo
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- CN110231221A CN110231221A CN201910409439.2A CN201910409439A CN110231221A CN 110231221 A CN110231221 A CN 110231221A CN 201910409439 A CN201910409439 A CN 201910409439A CN 110231221 A CN110231221 A CN 110231221A
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- 238000000576 coating method Methods 0.000 title claims abstract description 129
- 239000011248 coating agent Substances 0.000 title claims abstract description 126
- 238000005507 spraying Methods 0.000 title claims abstract description 30
- 238000010998 test method Methods 0.000 title claims abstract description 23
- 239000011159 matrix material Substances 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000013001 point bending Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000011247 coating layer Substances 0.000 claims abstract description 10
- 238000011156 evaluation Methods 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000005524 ceramic coating Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000033764 rhythmic process Effects 0.000 abstract description 3
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000943 NiAl Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000007620 mathematical function Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention discloses a kind of test method of hot-spraying coating mechanical property, belongs to hot-spraying coating detection field.The test method carries out three-point bend test to matrix+coating (ctsub), matrix (sub) first；Then Function Fitting is carried out to the load-displacement curves that three-point bending obtains；It finally carries out unit thickness coating mechanics contribution rate to the function curve after fitting to calculate, thus using unit thickness coating mechanics contribution rate come the mechanical property of accurate evaluation hot-spraying coating.This method is compared with existing measuring technology, eliminate the interference that matrix accurately tests heat spray coating layer material mechanical property, utilize the mechanical property of the more scientific evaluation coating of unit thickness coating mechanics contribution rate, more accurately have rated the comprehensive mechanical property of coating, test speed greatly improves, fast and easy optimizes best coating layer thickness and formula, accelerates rhythm of production, saves a large amount of man power and material.
Description
Technical field
The invention belongs to a kind of test method of hot-spraying coating mechanical property, hot-spraying coating detection fields.
Background technique
Hot-spraying coating has high-wearing feature, high-fire resistance and corrosion resistance, is widely used in aerospace and machinery etc.
Field.The performance of its coating directly determines the service life of material entirety, optimizes painting to it to the test of coating integrity energy
Layer material, the judgement of Service Environment and life prediction are vital.But due to its thinner thickness, coat inside is due to thermal jet
The presence of the defects of a large amount of holes of inherent characteristics bring of painting technology, crackle, is difficult accurately to evaluate and measure its performance.Heat
Spraying technology field personnel are made that very big effort to solve this problem, make great progress in recent years.
The mechanic property test method of traditional hot-spraying coating has:
It (1), can be intuitive by the hardness of Nanoindentation testing thermal spraying coat inside, Young's modulus and crack propagation situation
Reaction coating material Some Mechanical Properties.Since plasma spray technology operation strategies are wider, the material category of preparation is more, applies
Layer material multiplicity, complexity, this method can only characterize the mechanical property of nanometer or submicron order, and what cannot be integrated evaluates the whole of coating
Body service performance.
(2) hardness and resistance to crack extension ability that coating material is evaluated by microhardness technology, can preferably evaluate
The hardness of coating material and the crack propagation near impression.But since the inherent characteristics of plasma spray technology are formed in coat inside
A large amount of micro-crack and micropore, these defects generate very the reliability of its result in the measurement process of microhardness technology
Big influence；In addition, microhardness technology can only analyze the micron-sized mechanical property of hot-spraying coating, cannot be taken well for it
The rational performance of labour state is evaluated.
(3) mechanics feedback and anti-crack of the coating in tension stress or compression are characterized by traditional three-point bending
Ability is characterized, and this method can characterize material from macroscopic view.But the thickness of basis material is considerably beyond coating material,
So the mechanical property of its measurement is probably covered by the mechanical property of matrix, the mechanical property of matrix is to coating mechanical property
Evaluation produce very big interference, effect is extremely limited.
The mechanic property test method of traditional hot-spraying coating has many limitations, in addition as every profession and trade is to thermal spraying
The promotion that coating material mechanical property accurate evaluation requires, the above method have been difficult meet the needs of current.
For the defect of above-mentioned conventional method, a kind of mechanical property that can characterize material entirety is needed, and eliminates matrix pair
The test method of heat spray coating layer material mechanical property interference, more accurately evaluates the comprehensive mechanical property of coating, with convenient
The best coating layer thickness of rapid Optimum, formula, accurate judgement coating material Service Environment and Accurate Prediction service life accelerate production
Rhythm.
Summary of the invention
The problem to be solved in the present invention is: the mechanic property test method of traditional hot-spraying coating is due to matrix mechanical property
The shortcomings that interference of energy can not accurately characterize macroscopical comprehensive mechanical property of material.
The object of the invention and meaning are to provide a kind of test method of hot-spraying coating mechanical property, specifically include following
Step:
(1) three-point bend test is carried out respectively to matrix+coating, matrix, setting three-point bending equipment pressure head pushes speed 0.01-
1mm/min obtains the load-displacement curves in test process until coating generates macroscopic cracking and stops test.
(2) Function Fitting is carried out to the load-displacement curves that three-point bending obtains, obtains the song of matrix+coating and matrix
Line fitting function equationP ctsub (x)WithP sub (x)。
(3) it carries out pressure head in three-point bend test to the function curve after fitting to calculate function made by coating, calculating side
Journey is as follows:
In above formulaWBe in three-point bend test pressure head to function made by coating,It is the total displacement of pressure head in three-point bending,HIt is
Coating layer thickness.
(4) following accounting equation is utilized, unit thickness coating mechanics contribution rate is calculated,
The mechanical properties such as hot-spraying coating crack propagation and plastic deformation can preferably be evaluated.
Preferably, coating of the present invention is amorphous coating, metal/alloy coating, ceramic coating, amorphous-Ceramic Composite
One of coating, metal-ceramic composite coatings.
Preferably, matrix of the present invention is one of metal/alloy, high molecular material, ceramics.
Three-point bending of the present invention is to make the bending of coating tension stress state, make in the bending of coating compression chord state
It is a kind of.
Beneficial effects of the present invention:
(1) the method for the invention eliminates base under the premise of traditional three-point bend test coating macroscopic view comprehensive mechanical property
Influence of the body to hot-spraying coating Mechanics Performance Testing can preferably analyze coating material system in compression chord and tensile stress
In the case of mechanical property performance.
(2) situation of the test method of the present invention closer to coating during military service remains in test process
Each factor in coating material system (bonding of matrix and coating, the influence of coat inside defect, the boundary between coat inside particle
Face effect etc.) between mechanics influence.
(3) it has fully considered influence of the coating layer thickness to coating performance, has been mentioned for the best coating layer thickness of rapid Optimum and formula
For good Evaluating Mechanical Properties index.
Detailed description of the invention
Fig. 1 is that the embodiment of the present invention provides the flow chart of test method；
Fig. 2 is that the embodiment of the present invention provides the three-point bending schematic diagram of test method；
Fig. 3 is the three-point bending load-displacement curve that test method obtains in embodiment 1；
Fig. 4 is the three-point bending load-displacement Function Fitting curve that test method obtains in embodiment 1.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
The flow chart for the method that elimination matrix interferes hot-spraying coating Mechanics Performance Testing provided by the present embodiment is referring to figure
1.The test method includes:
Step S1 prepares amorphous-ceramic composite coating using plasma spraying in mild steel Q235 matrix surface, and to matrix and
Matrix+coating carries out 900 DEG C of heat treatments in 12 hours.
Step S2 carries out coating tension stress effect as shown in Figure 2 a to matrix+coating (ctsub), matrix (sub)
Three-point bend test, setting three-point bending equipment pressure head push speed 0.01mm/min, until coating generates macroscopic cracking and stops
Test obtains the load-displacement curves (referring to Fig. 3) in test process.
Step S3 carries out Function Fitting to the load-displacement curves that three-point bending obtains, obtains the fitting function side of curve
Journey P (x), referring to Fig. 4.
Step S4 carries out unit thickness coating mechanics contribution rate to the function curve after fitting and calculates；Before obtaining heat treatment
The unit thickness coating mechanics contribution rate of coating is 258.06 J, and the unit thickness coating mechanics contribution rate of coating is after heat treatment
387.1 J.Specific calculation is as follows:
The load-displacement curves for being of three-point bending are illustrated in figure 3, it is as shown in Figure 4 that arriving for Function Fitting is carried out to it
Mathematical function and function curve:
The load-displacement curves fitting function of original substrate are as follows:
The load-displacement curves fitting function of matrix after heat treatment are as follows:
The load-displacement curves fitting function of original coating+matrix are as follows:
Coating+matrix load-displacement curves fitting function after heat treatment are as follows:
Fitting function, which is brought into equation, to be obtained:
After heat treatment coating in three-point bend test pressure head to function made by coating:
Original coating in three-point bend test pressure head to function made by coating:
It is through SEM detection coating layer thicknessH=580μm, it brings its thickness into following equations and obtains:
The unit thickness coating mechanics contribution rate of coating after heat treatment are as follows:
The unit thickness coating mechanics contribution rate of original coating are as follows:
The unit thickness coating mechanics contribution rate of coating is higher than original coating after heat treatment, illustrates to press during three-point bending
Head, which has function made by coating, is relatively chiefly used in crack propagation and plastic deformation, and coating has better energy tolerance, anti-crack expansion
Ability and fracture toughness, by also demonstrating this viewpoint to observation of coating during three-point bending.
Three-point bending shown in Fig. 2 can make coating tension stress act on (Fig. 2 a), can also compression chord effect (such as 2b),
Can comprehensive testing coating stress during military service, accurately evaluate the macro-mechanical property of coating.Shown in Fig. 3
Three-point bending load-displacement curve, microstructure caused by should be apparent that basis material is different or being heat-treated changes
The influence become to coating performance is very huge.The present invention is by elimination matrix shown in Fig. 4 to coating Mechanics Performance Testing
The matched curve that the method for interference obtains, eliminates the influence of matrix mechanical property, accurately has rated coating material in Re Chu
The comprehensive mechanical property performance of reason front and back: the unit thickness coating mechanics contribution rate of Front-coating mirror is heat-treated for 258.06 J, at heat
The unit thickness coating mechanics contribution rate of coating is 387.1 J after reason.
Embodiment 2
The flow chart for the method that elimination matrix interferes hot-spraying coating Mechanics Performance Testing provided by the present embodiment is referring to figure
1.The test method includes:
Step S1, in surface of plastic matrix using arc spraying technology spraying preparation NiAl alloy epitaxy coating.
Step S2 carries out coating compression chord effect as shown in Figure 2 b to matrix+coating (ctsub), matrix (sub)
Three-point bend test, setting three-point bending equipment pressure head push speed 1mm/min, until coating generates macroscopic cracking and stops surveying
Examination obtains the load-displacement curves in test process.
Step S3 carries out Function Fitting to the load-displacement curves that three-point bending obtains, obtains the fitting function side of curve
Journey P (x).
Step S4 carries out unit thickness coating mechanics contribution rate to the function curve after fitting and calculates；Before obtaining heat treatment
The unit thickness coating mechanics contribution rate of coating is 157.54 J.
Embodiment 3
The flow chart for the method that elimination matrix interferes hot-spraying coating Mechanics Performance Testing provided by the present embodiment is referring to figure
1.The test method includes:
Step S1 is closed in nickel base superalloy matrix surface using supersonic flame spraying technology spraying preparation NiCoCrAl+YSZ
Gold plating.
Step S2 carries out coating compression chord effect as shown in Figure 2 b to matrix+coating (ctsub), matrix (sub)
Three-point bend test, setting three-point bending equipment pressure head push speed 0.1mm/min, until coating generates macroscopic cracking and stops surveying
Examination obtains the load-displacement curves in test process.
Step S3 carries out Function Fitting to the load-displacement curves that three-point bending obtains, obtains the fitting function side of curve
Journey P (x).
Step S4 carries out unit thickness coating mechanics contribution rate to the function curve after fitting and calculates；Before obtaining heat treatment
The unit thickness coating mechanics contribution rate of coating is 289.4 J.
Embodiment 4
The flow chart for the method that elimination matrix interferes hot-spraying coating Mechanics Performance Testing provided by the present embodiment is referring to figure
1.The test method includes:
Step S1 prepares alumina ceramic coating using plasma spraying technology spraying in corundum matrix surface.
Step S2 carries out coating tension stress effect as shown in Figure 2 a to matrix+coating (ctsub), matrix (sub)
Three-point bend test, setting three-point bending equipment pressure head push speed 0.01mm/min, until coating generates macroscopic cracking and stops
Test obtains the load-displacement curves in test process.
Step S3 carries out Function Fitting to the load-displacement curves that three-point bending obtains, obtains the fitting function side of curve
Journey P (x)；
Step S4 carries out unit thickness coating mechanics contribution rate to the function curve after fitting and calculates；Obtain heat treatment Front-coating mirror
Unit thickness coating mechanics contribution rate be 192.6 J.
Three-point bending similar with 1 Fig. 3 of embodiment can be obtained to test method used in 2 ~ 4 materials of embodiment to carry
Lotus-displacement curve；Three-point bending load-displacement Function Fitting song similar with 1 Fig. 4 of embodiment can be obtained by being fitted to it
Line；And interference of the matrix to coating material Mechanics Performance Testing can be eliminated to greatest extent, accurate unit of account thickness coatings
Mechanics contribution rate accurately evaluates the mechanical property of coating, optimizes best coating layer thickness, formula, accurate judgement with fast and easy
Coating material Service Environment and Accurate Prediction service life accelerate rhythm of production.
Claims (3)
1. a kind of test method of hot-spraying coating mechanical property, which is characterized in that specifically includes the following steps:
(1) three-point bend test is carried out respectively to matrix+coating, matrix, setting three-point bending equipment pressure head pushes speed 0.01-
1mm/min obtains the load-displacement curves in test process until coating generates macroscopic cracking and stops test；
(2) Function Fitting is carried out to the load-displacement curves that three-point bending obtains, the curve for obtaining matrix+coating and matrix is quasi-
Close functional equationP ctsub (x)WithP sub (x)；
(3) it carries out pressure head in three-point bend test to the function curve after fitting to calculate function made by coating, accounting equation is such as
Under:
In above formulaWBe in three-point bend test pressure head to function made by coating,It is the total displacement of pressure head in three-point bending,HIt is
Coating layer thickness；
(4) following accounting equation is utilized, unit thickness coating mechanics contribution rate is calculated,It can be preferably
Evaluation hot-spraying coating crack propagation and plastic deformation etc. mechanical properties
。
2. the test method of hot-spraying coating mechanical property, feature exist according to claim 1: the coating is amorphous painting
One of layer, metal/alloy coating, ceramic coating, amorphous-ceramic composite coating, metal-ceramic composite coatings.
3. the test method of hot-spraying coating mechanical property according to claim 1, it is characterised in that: matrix is metal/conjunction
One of gold, high molecular material, ceramics.
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Cited By (6)
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|---|---|---|---|---|
| CN111735728A (en) * | 2020-05-22 | 2020-10-02 | 扬州市舜意机械有限公司 | Method and device for identifying mechanical property of vibration damping coating |
| CN112629725A (en) * | 2020-12-04 | 2021-04-09 | 江苏徐工工程机械研究院有限公司 | Method for testing residual stress of piston rod spraying coating |
| CN112903394A (en) * | 2021-02-10 | 2021-06-04 | 北京科技大学 | Method and device for measuring fracture toughness of coating |
| CN114018698A (en) * | 2021-10-20 | 2022-02-08 | 北京卫星制造厂有限公司 | Method for measuring and calculating intrinsic strength of composite material by using controllable processing damage |
| CN114486516A (en) * | 2021-12-24 | 2022-05-13 | 中国京冶工程技术有限公司 | Method for testing coating crack following performance |
| CN115290429A (en) * | 2022-07-27 | 2022-11-04 | 昆明理工大学 | Novel detection device and detection method for mechanical property of coating |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735728A (en) * | 2020-05-22 | 2020-10-02 | 扬州市舜意机械有限公司 | Method and device for identifying mechanical property of vibration damping coating |
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| CN112629725A (en) * | 2020-12-04 | 2021-04-09 | 江苏徐工工程机械研究院有限公司 | Method for testing residual stress of piston rod spraying coating |
| CN112903394A (en) * | 2021-02-10 | 2021-06-04 | 北京科技大学 | Method and device for measuring fracture toughness of coating |
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