CN108120650A - One kind can scraping performance detection and evaluation method for seal coating - Google Patents
One kind can scraping performance detection and evaluation method for seal coating Download PDFInfo
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- CN108120650A CN108120650A CN201611071948.1A CN201611071948A CN108120650A CN 108120650 A CN108120650 A CN 108120650A CN 201611071948 A CN201611071948 A CN 201611071948A CN 108120650 A CN108120650 A CN 108120650A
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- 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
- G01N3/58—Investigating machinability by cutting tools; Investigating the cutting ability of tools
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- 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
- G01N3/56—Investigating resistance to wear or abrasion
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- 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
- G01N2203/003—Generation of the force
- G01N2203/0053—Cutting or drilling tools
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- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
Abstract
The invention belongs to aero-engine technology field, more particularly to one kind for seal coating can scraping performance detection and evaluation method, suitable for the measure of thermal spraying abradable seal coating scraping performance.The flow of this method is：Blade sample → Zero positioning → setting test parameters → carry out scraping experiment → interpretation of result and evaluation are installed in coating preparation → measure, weigh →.Using development of the present invention, to low-temperature zone seal coating in three kinds：AHB (aluminium/boron nitride), the material of Metco601 (aluminium silicon polyphenyl fat) and Metco307 (nickel graphite) coating is studied with the friction and wear behavior with secondary scraping, having formulated abradable seal coating can scraping performance criterion, 4 quantitative criterias such as 3 qualitative criterias such as the evaluation of scraping power, worn-out surface pattern and its analysis of components, polishing scratch Cross Section Morphology and its analysis of components and blade height abrasion ratio, blade coatings quality abrasion ratio, polishing scratch length ratio and sticking ratio are determined.
Description
Technical field
It, can scraping performance detection for seal coating more particularly to one kind the invention belongs to aero-engine technology field
And evaluation method, suitable for the measure of thermal spraying abradable seal coating scraping performance.
Background technology
High thrust, high efficiency, low oil consumption have become engine design and the overall goal manufactured, to improve engine effect
Rate prolongs the service life and reduces oil consumption, should reduce the running clearance between rotor and stator to the greatest extent, and gas circuit sealing technique
It is exactly one of key technology of high-performance enginer development.Gas circuit seals between the blade and casing of currently advanced aero-engine
Mostly using abradable seal coating technology, seal coating has easy manufacture, small investment, at low cost, safe and reliable and easily overhaul
The advantages that replacement is economic and reliable and advanced manufacturing technology rational in infrastructure the most.China to the application of gas circuit sealing technique also
Be in the primary stage, for obturage the design of material, seal coating, preparation, using etc. many places in reference to imitation stage, especially
It is to service condition, moving law, usage performance, the understanding of wear mechanism is quite insufficient, is tied in itself just because of seal coating
The complexity (matrix, the second phase, hole phase) of structure, the particularity (high speed, variable load, high temperature) of application environment and abrasion mechanism is more
Sample, they abrasional behavior research and performance evaluation become a big difficult point, so far still without standard test method and effectively
Evaluation criteria.
The importance of seal coating and mating plate matching (can ploughing, abradability, compatibility) is recognized due to lacking
Knowledge, shortage can carry out coating scraping performance the standard of comprehensive characterization, this is resulted in engineering practice, and gas circuit sealing is with pair
There are a large amount of problems during engine is on active service, cause and obturage effect failure.So there is an urgent need to being capable of simulated engine work
The scrape type fretting wear combination property tester of condition carries out seal coating scraping performance test, and establishes seal coating and can scrape
Cut method of evaluating performance.The foundation of overall evaluation system will be helpful to abradable seal coating intrinsic performance and usage performance
Comprehensive understanding has theory significance for development high Temperature Tribological, advanced composite material (ACM), for improving aeroplane engine engine efficiency,
Promote Aviation Industry that there is realistic meaning.
The content of the invention
It is an object of the invention to provide one kind for seal coating can scraping performance detection and evaluation method, can be as
Aerial engine air passage seals seal coating system and with secondary (blade tip linear velocity at a high speed：It is maximum up to 450m/s) scraping experiment and
The guidance foundation of scraping performance evaluation.
The technical scheme is that：
One kind for seal coating can scraping performance detection and evaluation method, flow is：Coating preparation → measure is weighed
→ installation blade sample → Zero positioning → setting test parameters → carry out scraping experiment → interpretation of result and evaluation.
It is described for seal coating can scraping performance detection and evaluation method, sample prepares specific as follows：
(1) preparation of coating sample
1) coating sample size
The basis material used in coating sample material selection actual condition, specimen size are 76 × 40 × 4mm, on it
The seal coating of coating thickness 1.5mm~3.0mm；
2) coating sample surface state
Coating sample surface state has an impact result of the test, it is this influence usually with specimen surface roughness and pollutant
Introducing it is related；
Coating sample surface state mean roughness quantification, by hand being ground on each sand paper from thick to thin successively
System, the average surface roughness value Ra of coating sample should be less than 5 μm under a variety of experimental conditions, and the coating layer thickness after grinding is not small
In 1.5mm；
Coating sample surface should try one's best cleaning, contamination-free, and the coating sample prepared is blown with clean compressed air
Except the particle of surface residual；
(2) blade sample is simulated
1) blade specimen size is simulated
The vane size requirement is simulated, wherein blade tip thickness has a major impact result of the test, should be according to actual blade and blade
The thickness of the thickness selection simulation blade tip of point, usual thickness are：0.7mm、1.0mm、2.0mm；
2) wheel disc dynamic balancing is calibrated
In order to which guarantee test wheel disk stablizes safety, it is necessary to it into action balance during acceleration and high-speed rotation
Calibration, the quality of blade sample need to carry out surface according to the difference of clump weight quality repair and scrapes adjustment；
3) blade surface state is simulated
Simulation blade surface should clean, contamination-free, and the blade sample prepared is shaken using acetone soln in ultrasonic wave
Dynamic cleaning surface smut and oil stain.
It is described for seal coating can scraping performance detection and evaluation method, test parameters is set and carries out scraping experiment
It is specific as follows：
(1) measure, weigh
It weighs to coating sample and blade sample, measure blade tip height and record；
(2) sample is installed
1) coating sample is installed
Coating sample is clamped in the clamping tooling of testing stand, is confirmed secured；
2) blade sample is installed
Blade sample is loaded on correspondence position above wheel disc to be loaded counterweight；
3) Zero positioning
In order to determine feeding origin, fed by Zero positioning, feeding displacement is made accurately to reach preset value；
4) test parameters is set
Scraping linear velocity, feed rate, scrape depth and temperature ginseng are set according to test requirements document in equipment control software
Number：
Temperature：500℃；
Blade tip scraping linear velocity：250m/s~350m/s；
Feed rate：10 μm/s~20 μm/s；
Scrape depth：500μm；
5) scraping experiment is carried out
Heating system is opened successively, and dynamical system after temperature and rotating speed reach preset value, opens feed system, with volume
Constant speed degree scraping, after feeding depth reaches preset value, experiment finishes, and feeding platform exits, and closes heating system；Scraping process
In, linear velocity in the range of 250m/s~350m/s, dynamical system transfer disk rotating speed be 16000~23000r/min, scraping power
Scope is 5N~20N.
It is described for seal coating can scraping performance detection and evaluation method, qualitative evaluating method is as follows：
1) scraping power is evaluated
Using the distributional analysis coating abradability of scraping power during experiment, the distribution of scraping power is more equal during scraping
It is even, show that coating composition distribution and tissue are more uniform, coating abradability can be more superior；
2) worn-out surface pattern and its ingredient
A) macro morphology
The surface macro morphology of coating sample before and after abradable experiment and blade sample is seen using stereoscope
It examines, and front, the front of blade and the side to coating shoot 1 respectively：1 and 20：1 photo；
Coating scraping face color and non-scraping face color are closer after experiment, and coating and blade gully are more shallow, coating can
Abrasivity is better；
B) microscopic appearance
The variation of the surface topography and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD
Feasible Analysis on Microstructure, if having the distribution situation of the transfer of substance, the generation of cenotype and phase, for abrasion mechanism
Research；
C) three-dimensional appearance
Coating sample before and after abradable experiment and blade sample are carried out using 3 D non-contacting type optical surface profiler
Observation, the smaller coating of polishing scratch profile variations amount can be ploughing better；
3) polishing scratch Cross Section Morphology and its ingredient
The variation of the Cross Section Morphology and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD
Feasible Analysis on Microstructure, by the analysis to polishing scratch Cross Section Morphology and ingredient, help is understood in high speed scraping process
Physics, the chemical change being likely to occur between middle material, and help to judge the compatibility between blade and coating.
It is described for seal coating can scraping performance detection and evaluation method, quantitative evaluation method is as follows：
1) blade height abrasion ratio I DR
Coating abradability is evaluated using blade wear ratio I DR：
IDR=(h1-h2)/(D+h1-h2)
IDR --- blade wear ratio；
H1 --- height mm before blade scraping；
H2 --- height mm after blade scraping；
D --- coating scrape depth mm；
Blade wear than absolute value it is smaller, abradability can be better；When using blade wear to be main, IDR is positive value,
When coating material occur and sticking blade, IDR is negative value；
2) IQR is compared in blade coatings quality abrasion
Using leaf quality abrasion ratio I QR evaluation coating abradabilities：
IQR=(m1-m2)/(M1-M2)；
IQR --- leaf quality wears ratio；
M1 --- quality g before blade scraping；
M2 --- quality g after blade scraping；
M1 --- quality g before coating scraping；
M2 --- quality g after coating scraping；
For coating of the same race, under the conditions of different scrapings, leaf quality abrasion is than smaller, grinding under this condition
Consumption can be more excellent；
3) polishing scratch length compares L1:L0
If blade wear, height reduce, L1<L0；
If the adherency of generation coating, blade increase, L1>L0；
4) sticking ratio
It is evaluation of the coating to blade adherent coating suitable for scrape mode：
Sticking ratio=(quality of adherent coating material/coating is weightless on blade) 100%
Sticking ratio is bigger, shows that the coating material accounting for adhering to blade surface is higher, and the degree of adhesion of coating is more serious,
It can be ploughing poorer.
It is described for seal coating can scraping performance detection and evaluation method, evaluated and applied using blade wear ratio I DR
During layer abradability, it is less than 10% to be excellent with IDR absolute values, is good between 10~25%, more than 40% to be poor.
Advantages of the present invention and advantageous effect are：
1st, the present invention chooses current aeroplane engine using the scrape type testing machine for the simulated engine operating mode succeeded in developing
The seal coating of ripe application carries out scraping performance detection on machine, and formulates evaluation method.The technical method includes heat
The requirements such as sample preparation, test method and the evaluation method in abradable seal coating scraping experiment are sprayed, are discussed in detail simultaneously
Sample prepares and experiment process, and the qualitative evaluation and quantitative assessment of result of the test be illustrated, and fills up such domestic inspection
The blank of survey method has filled up the blank of such domestic test method.
2nd, scraping performance detection is carried out to seal coating by simulation operating mode, can greatly reinforced to seal coating comprehensive performance
Assessment, meet the needs to seal coating quality control.By former to seal coating and mating plate military service mechanism and tribology
The grasp of reason can further improve engine component quality control level, reduce parts repair rate, every by casing part
100 calculating of year, at least reduce repair rate 1 time, can save 2,000,000 yuans.Using the standards system, applied to obturaging
Layer and carry out high-speed and high-temperature scraping experiment and evaluation with pair, be seal coating and with secondary matching, gas circuit sealing with it is secondary determine,
The ingredient and structure of seal coating and moulding process have preferably provided theoretical foundation and guideline.
3rd, using development of the present invention, to low-temperature zone seal coating in three kinds：AHB (aluminium/boron nitride), Metco601
The material of (aluminium silicon polyphenyl fat) and Metco307 (nickel graphite) coating is studied with the friction and wear behavior with secondary scraping, is formulated
Abradable seal coating can scraping performance criterion, it is determined that the evaluation of scraping power, worn-out surface pattern and its analysis of components, polishing scratch
3 qualitative criterias such as Cross Section Morphology and its analysis of components and blade height abrasion ratio, blade coatings quality abrasion ratio, mill
4 quantitative criterias such as trace length ratio and sticking ratio.
Description of the drawings
Fig. 1 is Al/BN coatings and the test piece exterior appearance to mill after high speed scraping experiment；Wherein, (a) coating surface shape
State；(b) blade surface state.
Metco601 (aluminium silicon polybenzoate) coatings and the test piece exterior appearance to mill after Fig. 2 high speeds scraping experiment；Wherein,
(a) coating surface state；(b) blade surface state.
Specific embodiment
In specific implementation process, the present invention for seal coating can scraping performance detection and evaluation method, main flow
For：Coating preparation → measure, weigh → install blade sample → Zero positioning → setting test parameters → carry out scraping experiment →
Interpretation of result and evaluation, it is specific as follows：
(1) the following terms and definitions are suitable for the method for the present invention.
Abradability：Seal coating and blade be to grinding scraping under the conditions of high temperature and high speed, coating occur actively abrasion without
Wear the ability of blade.
Blade height is worn than (IDR)：The ratio of blade height difference and total feed depth before and after scraping.
Blade coatings quality is worn than (IQR)：The ratio of leaf quality difference and coating quality difference before and after scraping.
(2) instrument and equipment
1) high temperature and high speed scraping testing machine
Temperature range：Room temperature~1200 DEG C；
Blade tip linear velocity：Maximum reachable 450m/s；
Feed rate：1~2000 μm/s.
2) stereoscope
Amplification factor：6.5 ×~100 ×.
3) 3 D non-contacting type optical surface profiler
Vertical resolution：Highest 10nm；
Horizontal optical resolution ratio：400nm；
Maximum scan height：22mm；
Maximum scan area：150×120mm.
4) electronic balance
Precision 0.0001g.
5) scanning electron microscope
6) X-ray diffractometer
(3) prepared by sample
1st, the preparation of coating sample
1) coating sample size
The basis material used in coating sample material selection actual condition, specimen size are (long × wide for 76 × 40 × 4mm
× thick), the seal coating of coating thickness 1.5mm~3.0mm on it.
2) coating sample surface state
Coating sample surface state has an impact result of the test.This influence is usually with following one or more because being known as
It closes：
--- specimen surface roughness
--- the introducing of pollutant
The influence for making these factors is reduced to minimum by following suggestion.
Coating sample surface state mean roughness quantification, by hand being ground on each sand paper from thick to thin successively
System, the average surface roughness value Ra of coating sample should be less than 5 μm under a variety of experimental conditions, and the coating layer thickness after grinding is not small
In 1.5mm.
Coating sample surface should try one's best cleaning, contamination-free.The coating sample prepared is blown with clean compressed air
Except the particle of surface residual, the sample prepared should be tested as early as possible, can be stored in the sample bag or box of sealing in short term
In it is for use.
2nd, blade sample is simulated
1) blade specimen size is simulated
The vane size requirement is simulated, wherein blade tip thickness has a major impact result of the test, should be according to actual blade and blade
The thickness of the thickness selection simulation blade tip of point, usual thickness are：0.7mm、1.0mm、2.0mm.
2) wheel disc dynamic balancing is calibrated
In order to which guarantee test wheel disk stablizes safety, it is necessary to it into action balance during acceleration and high-speed rotation
Calibration, the quality of blade sample need to carry out surface according to the difference of clump weight quality repair and scrapes adjustment.
3) blade surface state is simulated
Simulation blade surface should clean, contamination-free.The blade sample prepared is shaken using acetone soln in ultrasonic wave
Dynamic cleaning surface smut and oil stain, the sample prepared should be tested as early as possible, can be stored in short term with good seal
It is for use in sample bag or box.
(4) test
1st, measure, weigh
It weighs to coating sample and blade sample, measure blade tip height and record.
The 2nd, sample is installed
1) coating sample is installed
Coating sample is clamped in the clamping tooling of testing stand, is confirmed secured.
2) blade sample is installed
Blade sample is loaded on correspondence position above wheel disc to be loaded counterweight.
3) Zero positioning
In order to determine feeding origin, fed by Zero positioning, feeding displacement is made accurately to reach preset value.
4) test parameters is set
Scraping linear velocity, feed rate, scrape depth and temperature etc. are set in equipment control software according to test requirements document
Parameter.
Temperature：500℃；
Blade tip scraping linear velocity：250m/s~350m/s；
Feed rate：10 μm/s~20 μm/s；
Scrape depth：500μm.
5) scraping experiment is carried out
Stringent empirically operating instruction, opens heating system, dynamical system treats that temperature and rotating speed reach preset value successively
Afterwards, feed system is opened, with normal speed scraping, after feeding depth reaches preset value, experiment finishes, and feeding platform exits,
Close heating system.During scraping, in the range of 250m/s~350m/s, dynamical system transfer disk rotating speed is linear velocity
16000~23000r/min, scraping power scope are 5N~20N.
(5) result of the test
1st, qualitative evaluation
1) scraping power is evaluated
Using the distributional analysis coating abradability of scraping power during experiment.The distribution of scraping power is more equal during scraping
It is even, show that coating composition distribution and tissue are more uniform, coating abradability can be more superior.
2) worn-out surface pattern and its ingredient
A) macro morphology
The surface macro morphology of coating sample before and after abradable experiment and blade sample is seen using stereoscope
It examines, and front, the front of blade and the side to coating shoot 1 respectively：1 and 20：1 photo.
Coating scraping face color and non-scraping face color are closer after experiment, and coating and blade gully are more shallow, coating can
Abrasivity is better.
B) microscopic appearance
The variation of the surface topography and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD
Feasible Analysis on Microstructure, if having situations such as transfer of substance, the generation of cenotype and distribution of phase, be mainly used for grinding
Damage the research of mechanism.
C) three-dimensional appearance
Coating sample before and after abradable experiment and blade sample are carried out using 3 D non-contacting type optical surface profiler
Observation, the smaller coating of polishing scratch profile variations amount can be ploughing better.
3) polishing scratch Cross Section Morphology and its ingredient
The variation of the Cross Section Morphology and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD
Feasible Analysis on Microstructure by the analysis to polishing scratch Cross Section Morphology and ingredient, can help to understand in high speed scraping
Physics, the chemical change being likely to occur between process in which materials, and help to judge the compatibility between blade and coating.
2nd, quantitative assessment
1) blade height abrasion ratio (IDR)
Coating abradability is evaluated using blade wear ratio (IDR).
IDR=(h1-h2)/(D+h1-h2)
IDR --- blade wear ratio；
H1 --- height (mm) before blade scraping；
H2 --- height (mm) after blade scraping；
D --- coating scrape depth (mm)；
Blade wear than absolute value it is smaller, abradability can be better.When using blade wear to be main, IDR is positive value,
When coating material occur and sticking blade, IDR is negative value.Generally it is less than 10% with IDR absolute values to be excellent, between 10~25%
To be good, more than 40% to be poor.
2) abrasion of blade coatings quality is than (IQR)
Coating abradability is evaluated using leaf quality abrasion ratio (IQR).
IQR=(m1-m2)/(M1-M2)；
IQR --- leaf quality wears ratio；
M1 --- quality (g) before blade scraping；
M2 --- quality (g) after blade scraping；
M1 --- quality (g) before coating scraping；
M2 --- quality (g) after coating scraping；
For coating of the same race, under the conditions of different scrapings, leaf quality abrasion is than smaller, grinding under this condition
Consumption can be more excellent.
3) polishing scratch length ratio (L1:L0)
R1----- turntables radius (mm)；
R2------ blade heights (mm)；
D-------- blades depth of invasion (mm)；
L0------ theory polishing scratch length (mm)；
The actual polishing scratch length (mm) of L1------；
If blade wear, height reduce, L1<L0；
If the adherency of generation coating, blade increase, L1>L0.
4) sticking ratio
It is evaluation of the coating to blade adherent coating suitable for scrape mode.
Sticking ratio=(quality of adherent coating material/coating is weightless on blade) 100%
Sticking ratio is bigger, shows that the coating material accounting for adhering to blade surface is higher, and the degree of adhesion of coating is more serious,
It can be ploughing poorer.
In the following, the present invention is further elaborated on by embodiment and attached drawing.
Embodiment 1
In the present embodiment, for seal coating can scraping performance detection and evaluation method, be as follows：
Step 1：Oil removal treatment is carried out to coating coupon substrate surface, using acetone or gasoline wiper element spraying area,
It degreases and sundries；
Step 2：Surface roughening treatment is carried out to coating coupon substrate surface, using forced blowing machine, 40 mesh white fused aluminas
Sand handles area to be sprayed, gas pressure 0.2MPa；
Step 3：Part is needed spraying area carry out plasma spraying NiAl bottoms, NiAl underlayer thicknesses for 0.1mm~
0.2mm, NiAl coating chemical composition are the Al of the Ni and 5wt% of 95wt%, and specific process parameter is：NiAl powder sizes are 50
μm~80 μm between, hydrogen flowing quantity 15SCFH, argon flow amount 60SCFH, powder feeding rate 40g/min, spray distance 110mm；
Step 4：Part is needed spraying area carry out plasma spraying Al/BN surface layers, Al/BN surface thicknesses for 2.0mm~
2.5mm, Al/BN coating chemical composition are BN about 20%, Al about 75%, other are binding agent agent etc., and specific process parameter is：
Al, BN powder size are between 50 μm~300 μm, hydrogen flowing quantity 20SCFH, argon flow amount 60SCFH, powder feeding rate 30g/min,
Spray distance 120mm；
Step 5：It polishes coating area, coating average surface roughness value Ra should be less than 5 μm, after grinding after polishing
Coating layer thickness be not less than 1.5mm；
Step 6：High speed scraping experiment parameter is set, and linear velocity 300m/s, feed speed are 10 μm/s, to experimentation
Middle parameter is recorded；
Step 7：To coating test piece after experiment and leaf assay part is taken pictures and visual analysis (see Fig. 1)；
Step 8：Test piece after experiment is weighed and detected, and is calculated by respective formula, IDR values about-
33%, IQR value are -2% (coating adherency occurs in negative value expression).
Embodiment 2：
In the present embodiment, for seal coating can scraping performance detection and evaluation method, be as follows：
Step 1：Oil removal treatment is carried out to coating coupon substrate surface, using acetone or gasoline wiper element spraying area,
It degreases and sundries；
Step 2：Surface roughening treatment is carried out to coating coupon substrate surface, using forced blowing machine, 40 mesh white fused aluminas
Sand handles area to be sprayed, gas pressure 0.2MPa；
Step 3：Part is needed spraying area carry out plasma spraying NiAl bottoms, NiAl underlayer thicknesses for 0.1mm~
0.2mm, NiAl coating chemical composition are the Al of the Ni and 5wt% of 95wt%, and specific process parameter is：NiAl powder sizes are 50
μm~80 μm between, hydrogen flowing quantity 15SCFH, argon flow amount 60SCFH, powder feeding rate 40g/min, spray distance 110mm；
Step 4：Spraying area is needed to carry out plasma spraying Metco601 (aluminium silicon polybenzoate) surface layer, aluminium silicon polyphenyl to part
Ester surface thickness is 2.0mm~2.5mm, and aluminium silicon polybenzoate coating chemical composition is polybenzoate about 40wt%, AlSi about 60wt%,
Specific process parameter is：Al, BN powder size are between 11 μm~125 μm, hydrogen flowing quantity 15SCFH, argon flow amount 50SCFH,
Powder feeding rate 35g/min, spray distance 120mm；
Step 5：It polishes coating area, coating average surface roughness value Ra should be less than 5 μm, after grinding after polishing
Coating layer thickness be not less than 1.5mm；
Step 6：High speed scraping experiment parameter is set, and linear velocity 300m/s, feed speed are 10 μm/s, to experimentation
Middle parameter is recorded；
Step 7：To coating test piece after experiment and leaf assay part is taken pictures and visual analysis (see Fig. 2)；
Step 8：Test piece after experiment is weighed and detected, and is calculated by respective formula, IDR values are about 10%,
IQR values are 0.005% (positive value represents that blade has abrasion).
Embodiment the result shows that, the present invention deepened the military service machine of abradable seal coating and mating plate in aero-engine
Reason, advances seal coating quality control level.So as to, by formulate seal coating can scraping Performance evaluation criterion, advance
Seal coating quality control level reduces seal coating and does over again number of rewelding, it will saves substantial contribution.Meanwhile the achievement will
Significantly more efficient technical support can be provided for the development of other new seal coatings, there is certain economic benefit and society's effect
Benefit.
Claims (6)
1. one kind can scraping performance detection and evaluation method for seal coating, which is characterized in that its flow is：Coating preparation →
It measures, blade sample → Zero positioning of weighing → install → setting test parameters → carry out scraping experiment → interpretation of result and comment
Valency.
2. described in accordance with the claim 1 can scraping performance detection and evaluation method for seal coating, which is characterized in that sample
It prepares specific as follows：
(1) preparation of coating sample
1) coating sample size
The basis material used in coating sample material selection actual condition, specimen size are 76 × 40 × 4mm, are sprayed on it
The seal coating of thickness 1.5mm~3.0mm；
2) coating sample surface state
Coating sample surface state has an impact result of the test, and this influence is usually drawn with specimen surface roughness and pollutant
Enter related；
Coating sample surface state mean roughness quantification, being ground on each sand paper from thick to thin successively by hand,
The average surface roughness value Ra of coating sample should be less than 5 μm under various experimental conditions, and the coating layer thickness after grinding is not less than
1.5mm；
Coating sample surface should try one's best cleaning, contamination-free, by the compressed air blowing table of the coating sample prepared cleaning
The particle of face remnants；
(2) blade sample is simulated
1) blade specimen size is simulated
The vane size requirement is simulated, wherein blade tip thickness has a major impact result of the test, should be according to actual blade tip
The thickness of thickness selection simulation blade tip, usual thickness are：0.7mm、1.0mm、2.0mm；
2) wheel disc dynamic balancing is calibrated
In order to which guarantee test wheel disk stablizes safety, it is necessary to carry out dynamically balanced school to it during acceleration and high-speed rotation
Standard, the quality of blade sample need to be repaiied according to the difference of clump weight quality progress surface scrapes adjustment；
3) blade surface state is simulated
Simulation blade surface should clean, contamination-free, and the blade sample prepared is clear in ultrasonic activation using acetone soln
Wash surface smut and oil stain.
3. described in accordance with the claim 1 can scraping performance detection and evaluation method for seal coating, which is characterized in that sets
Test parameters and progress scraping experiment are specific as follows：
(1) measure, weigh
It weighs to coating sample and blade sample, measure blade tip height and record；
(2) sample is installed
1) coating sample is installed
Coating sample is clamped in the clamping tooling of testing stand, is confirmed secured；
2) blade sample is installed
Blade sample is loaded on correspondence position above wheel disc to be loaded counterweight；
3) Zero positioning
In order to determine feeding origin, fed by Zero positioning, feeding displacement is made accurately to reach preset value；
4) test parameters is set
Scraping linear velocity, feed rate, scrape depth and temperature parameter are set in equipment control software according to test requirements document：
Temperature：500℃；
Blade tip scraping linear velocity：250m/s~350m/s；
Feed rate：10 μm/s~20 μm/s；
Scrape depth：500μm；
5) scraping experiment is carried out
Heating system is opened successively, and dynamical system after temperature and rotating speed reach preset value, opens feed system, with specified speed
Scraping is spent, after feeding depth reaches preset value, experiment finishes, and feeding platform exits, and closes heating system；During scraping,
Linear velocity in the range of 250m/s~350m/s, dynamical system transfer disk rotating speed be 16000~23000r/min, scraping power scope
For 5N~20N.
4. described in accordance with the claim 1 can scraping performance detection and evaluation method for seal coating, which is characterized in that qualitative
Evaluation method is as follows：
1) scraping power is evaluated
Using the distributional analysis coating abradability of scraping power during experiment, scraping power is distributed more uniform, table during scraping
Bright coating composition distribution and tissue are more uniform, and coating abradability can be more superior；
2) worn-out surface pattern and its ingredient
A) macro morphology
The surface macro morphology of coating sample before and after abradable experiment and blade sample is observed using stereoscope, and
The front and side in front, blade to coating shoot 1 respectively：1 and 20：1 photo；
Coating scraping face color and non-scraping face color are closer after experiment, and coating and blade gully are more shallow, coating it is abradable
Property is better；
B) microscopic appearance
The variation of the surface topography and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD specific
Feasible Analysis on Microstructure, if having the distribution situation of the transfer of substance, the generation of cenotype and phase, for grinding for abrasion mechanism
Study carefully；
C) three-dimensional appearance
Coating sample before and after abradable experiment and blade sample are observed using 3 D non-contacting type optical surface profiler,
The smaller coating of polishing scratch profile variations amount can be ploughing better；
3) polishing scratch Cross Section Morphology and its ingredient
The variation of the Cross Section Morphology and coating composition of coating sample before and after experiment and blade sample is carried out using SEM, XRD specific
Feasible Analysis on Microstructure, by the analysis to polishing scratch Cross Section Morphology and ingredient, help understands the material during high speed scraping
Physics, the chemical change being likely to occur between material, and help to judge the compatibility between blade and coating.
5. described in accordance with the claim 1 can scraping performance detection and evaluation method for seal coating, which is characterized in that quantitative
Evaluation method is as follows：
1) blade height abrasion ratio I DR
Coating abradability is evaluated using blade wear ratio I DR：
IDR=(h1-h2)/(D+h1-h2)
IDR --- blade wear ratio；
H1 --- height mm before blade scraping；
H2 --- height mm after blade scraping；
D --- coating scrape depth mm；
Blade wear than absolute value it is smaller, abradability can be better；When using blade wear to be main, IDR is positive value, when going out
When existing coating material sticks blade, IDR is negative value；
2) IQR is compared in blade coatings quality abrasion
Using leaf quality abrasion ratio I QR evaluation coating abradabilities：
IQR=(m1-m2)/(M1-M2)；
IQR --- leaf quality wears ratio；
M1 --- quality g before blade scraping；
M2 --- quality g after blade scraping；
M1 --- quality g before coating scraping；
M2 --- quality g after coating scraping；
For coating of the same race, under the conditions of different scrapings, leaf quality is worn than smaller, abradability under this condition
It can be more excellent；
3) polishing scratch length compares L1:L0
If blade wear, height reduce, L1<L0；
If the adherency of generation coating, blade increase, L1>L0；
4) sticking ratio
It is evaluation of the coating to blade adherent coating suitable for scrape mode：
Sticking ratio=(quality of adherent coating material/coating is weightless on blade) 100%
Sticking ratio is bigger, shows that the coating material accounting for adhering to blade surface is higher, the degree of adhesion of coating is more serious, can scrape
Cutting property is poorer.
6. according to can scraping performance detection and evaluation method for seal coating described in claim 5, which is characterized in that use
When blade wear ratio I DR evaluates coating abradability, be less than 10% with IDR absolute values to be excellent, be between 10~25% it is good,
More than 40% to be poor.
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| CN109520875A (en) * | 2018-11-20 | 2019-03-26 | 中国航发贵州黎阳航空动力有限公司 | Turbine rotor blade integral shroud overlay cladding wear resistance at elevated temperature detection method |
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| CN111929190A (en) * | 2020-09-14 | 2020-11-13 | 矿冶科技集团有限公司 | Method for evaluating abradability of sealing coating and application thereof |
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| CN111855384B (en) * | 2020-07-31 | 2023-10-17 | 矿冶科技集团有限公司 | Abradable coating performance test system and method for efficient calculation of intrusion depth ratio |
| CN111929189A (en) * | 2020-09-14 | 2020-11-13 | 矿冶科技集团有限公司 | Method for evaluating abradability of sealing coating through abrasive dust components |
| CN111929190A (en) * | 2020-09-14 | 2020-11-13 | 矿冶科技集团有限公司 | Method for evaluating abradability of sealing coating and application thereof |
| CN112129663A (en) * | 2020-09-25 | 2020-12-25 | 武汉钢铁有限公司 | Method and device for evaluating abradability of abradable seal coating |
| CN113215513A (en) * | 2021-05-11 | 2021-08-06 | 成都中科翼能科技有限公司 | Novel post-treatment process for abradable Al/BN sealing coating of gas turbine part |
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