CN108401541B - Aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat and preparation method - Google Patents
Aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat and preparation method Download PDFInfo
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Abstract
The present invention relates to aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coats and preparation method thereof, the purpose is to provide wear-resisting one kind, shock resistance, corrosion-resistant finishes, strengthen self-lubricating knuckle bearing ball surface, the wear-resistant of oscillating bearing, anticorrosion and shock resistance are improved, its bearing capacity and reliability are promoted.Prepared by coating uses atmospheric plasma spraying technique, and nickel chromium triangle (NiCr) alloy transition layer and aluminium oxide (Al are sprayed in bearing ball substrate surface2O3) ceramic layer, thickness is respectively 40~100 μm and 200~350 μm.Al prepared by using plasma spraying technology2O3Coating is in the wear failure problem for solving high speed light loading self-lubricating knuckle bearing, it is shown that better than the performance of traditional hard chromium etc..
Description
Technical field
The present invention relates to wear-resistant coating preparing technical fields, and in particular to a kind of aviation high speed light loading self-lubricating pass
Bearings abrasion-proof ceramic coat and preparation method.
Background technology
Oscillating bearing is a kind of sliding bearing of special construction, can bear larger radial load, axial load
Lotus or radially, axially simultaneous connected load.Its slidingsurface is spherical shape, can make swing or certain angle
Spend the banking motion in range.Self-lubricating knuckle bearing is a kind of novel, special bearing, manufacturing technology
And performance characterization is related to multiple subject necks such as metallurgy, machinery, weaving, macromolecule, Surface Engineering and tribology
Domain has feature with high content of technology, manufacture difficulty is big.Current domestic air mail self-lubricating knuckle bearing is ground
Production capacity processed also lags behind international most advanced level, and main weak link, which shows as friction pair material type, to be had
Limit, applying frequency and military service temperature range are narrow.Comparison display, other than gasket material, the table of oscillating bearing
Surface strengthening is its key point.Currently, domestic self-lubricating knuckle bearing mainly shows under the conditions of high speed light loading
For the Fast Wearing of pairing lubrication liner and cut and the bearing body fracture of bearing ball surface, can be caused when serious
Associated mechanisms occlusion is stuck, leads to disastrous consequence, and the service life is far below desired value.For above-mentioned failure behaviour,
May infer that improves one of the emphasis of high speed light loading oscillating bearing wear-resisting property is how to further increase joint shaft
Hold wear-resisting property, shock resistance and the corrosion resistance etc. of spherome surface.
High speed light loading self-lubricating knuckle bearing early stage is completely dependent on import, tight due to foreign technology and product
Block, constitutes a threat to the development and production of China's New Fighter.To break away from domestic high-end aviation self-lubricating
Dependence of the oscillating bearing to external importing technology and product, it would be highly desirable to realize that critical process is prominent by independent research
It is broken.Currently, used facet joint bearing surface reinforcement technique mainly has：Electroplating technology prepare hard chromium and
Chemical vapor deposition (CVD) technique prepares titanium nitride (TiN) coating.Process above improves oscillating bearing
Surface abrasion resistance, but bearing service life improves limited (being less than 500h).It is closed to further increase self-lubricating
Bearings abrasion-resistant surface ability, foreign countries are somebody's turn to do in bearing ball thermal spraying on surface WC-Co hard alloy coating
Class product and technology still embargo to China.
Invention content
The purpose of the present invention is to provide a kind of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coats
And preparation method thereof, facet joint bearing surface wear-resisting property can be improved, extend oscillating bearing service life.
To achieve the above object, the present invention provides a kind of aviation high speed light loading self-lubricating knuckle bearing with resistance to
Ceramic coating is ground, including：The intermediate metal of spraying on substrate surface；And it is sprayed on the metal mistake
Cross the alumina ceramic layer in layer surface；The intermediate metal is nickel-chrome alloy layer or nickel alumin(i)um alloy layer.
Above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein the metal transfer
Layer is nickel-chrome alloy layer or nickel alumin(i)um alloy layer, and thickness is 40~100 μm, the thickness of the alumina ceramic layer
Degree is 200~350 μm.
Another technical solution provided by the invention is, a kind of aviation high speed light loading self-lubricating knuckle bearing is with wear-resisting
The preparation method of ceramic coating, includes the following steps：(1) base material pre-processes；To self-lubricating knuckle bearing ball
Surface carries out roughening and purified treatment；(2) in self-lubricating knuckle bearing ball substrate surface thermal spray metal mistake
Cross layer；It is 45 °~90 ° that direction, which is sprayed, with the tangential angle of spherical surface；(3) in intermediate metal thermal spraying on surface oxygen
Change aluminium ceramic layer；It is 45 °~90 ° that direction, which is sprayed, with the tangential angle of spherical surface；(4) grinding and polishing photooxidation aluminium ceramic layer.
The preparation method of above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein institute
It states thermal jet and is painted with plasma spray coating.
The preparation method of above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein institute
It states in the pretreatment of (1) base material, is roughened process emergy blasting treatment, roughness Ra is 4~10 μm.
The preparation method of above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein institute
It states in the pretreatment of (1) base material, purified treatment uses ultrasonic cleaning.
The preparation method of above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein
Self-lubricating knuckle bearing ball substrate surface plasma spray coating nickel-chrome alloy layer or nickel alumin(i)um alloy layer, plasma (orifice) gas
Body flow be 50~70slpm of argon gas, 8~12slpm of hydrogen, 550~650A of electric current, 40~46kW of power,
95~135mm of spray distance；In alloy transition layer surface plasma spray coating alumina ceramic layer, plasma
Gas flow is 40~60slpm of argon gas, 7~14slpm of hydrogen, 600~680A of electric current, power 45~50
KW, 85~125mm of spray distance.
The preparation method of above-mentioned aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, wherein institute
It states in (4), alumina layer mill is polished to surface roughness Ra and reaches 0.2~0.3 μm.
The aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat and preparation method thereof of the present invention, is adopted
Be intermediate metal with nickel-chrome alloy layer or nickel alumin(i)um alloy layer, bond properties is good, use alumina ceramic layer for
Working lining, wear-resisting property is good, can improve facet joint bearing surface wear-resisting property, extends oscillating bearing service life；
In spraying process, spraying direction and the tangential angle of spherical surface are 45 °~90 °, it is ensured that bearing ball face coat
Uniformity and good binding performance.
Description of the drawings
Aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat and preparation method thereof of the present invention by with
Under embodiment and attached drawing provide.
Fig. 1 is the aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat preparation method of the present invention
Flow chart.
Specific implementation mode
Below with reference to Fig. 1 to the aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat of the present invention
And preparation method thereof be described in further detail.
The present invention aviation high speed light loading self-lubricating knuckle bearing include with abrasion-proof ceramic coat：
The intermediate metal of spraying on substrate surface；And
Aluminium oxide (the Al being sprayed in the metal transfer layer surface2O3) ceramic layer.
The intermediate metal is used as the transition of stress layer between base material and ceramic layer, and the intermediate metal can
Can also be nickel aluminium (NiAl) alloy-layer to be nickel chromium triangle (NiCr) alloy-layer；The alumina ceramic layer
To enhance the working lining of self-lubricating knuckle bearing surface abrasion resistance.
The material of self-lubricating knuckle bearing is mostly GCr15 bearing steels, i.e., self-lubricating knuckle bearing base material is GCr15
Bearing steel, preferably, the intermediate metal be nickel-chrome alloy layer or nickel alumin(i)um alloy layer, thickness be 40~
100 μm, the thickness of the alumina ceramic layer is 200~350 μm.Between alloy-layer and GCr15 bearing steels
Adhesiveness is good, and the coefficient of thermal expansion of alloy-layer is not likely to produce close to the coefficient of thermal expansion of GCr15 bearing steels
Extra-stress；Aluminium oxide wear-resisting property is good, at low cost, and safe to use (pollution-free, non-toxic).
Referring to Fig. 1, the preparation side of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat of the invention
Method includes the following steps：
(1) base material pre-processes；
Roughening and purified treatment are carried out to self-lubricating knuckle bearing ball surface；
The emergy blasting treatment of roughening process, for increasing self-lubricating knuckle bearing ball surface roughness,
Roughness Ra is 4~10 μm, it is ensured that coating is contacted with the good of base material；
Ultrasonic cleaning can be used in purified treatment, is to reduce adhered particles etc. to purify substrate surface, into
The binding performance of one step enhancing base materials and intermediate metal；
(2) in self-lubricating knuckle bearing ball substrate surface thermal spray metal transition zone；
The thermal spraying is plasma spray coating；
Preferably, being closed in self-lubricating knuckle bearing ball substrate surface plasma spray coating nickel-chrome alloy layer or nickel aluminium
Layer gold, plasma gas flow be argon gas 50~70 liters/min (slpm), 8~12slpm of hydrogen, electric current 550~
650A, 40~46kW of power, 95~135mm of spray distance；Such plasma gas flow and electric current
Powdered nickel chromium triangle or nickel alumin(i)um alloy can be made to have relatively good molten condition, spray distance to select 95~135mm
The deposition shape of plate-like can be formed in substrate surface, and spray efficiency is high, the porosity is low, is conducive to improve
The coating quality of nickel chromium triangle or nickel alumin(i)um alloy layer；
Preferably, in spraying process, to ensure that bearing ball face coat is uniform, spraying direction is cut with spherical surface
It it is 45 °~90 ° to angle；
(3) in intermediate metal thermal spraying on surface alumina ceramic layer；
The thermal spraying is plasma spray coating；
Preferably, in intermediate metal (nickel-chrome alloy layer) surface plasma spray aluminum oxide ceramic layer,
Plasma gas flow is 40~60slpm of argon gas, 7~14slpm of hydrogen, 600~680A of electric current, power
45~50kW, 85~125mm of spray distance；Such plasma gas flow and electric current can make powdered
Aluminium oxide have a relatively good molten condition, spray distance selects 85~125mm can be in metal transfer layer surface
The deposition of plate-like is formed, and spray efficiency is high, the porosity is low, is conducive to the spray for improving alumina ceramic layer
Apply quality；
Preferably, in spraying process, to ensure that bearing ball face coat is uniform, spraying direction is cut with spherical surface
It it is 45 °~90 ° to angle.
(4) alumina layer mill is polished to surface roughness Ra and reaches 0.2~0.3 μm.
Now with specific embodiment, the present invention will be described in detail：
In following embodiment, the diameter of self-lubricating knuckle bearing is Φ 18mm, and spraying parameter is with Sulzer
It is listed on the basis of the F4-MB spray guns of Metco companies.
Embodiment 1
40 μ m-thick NiCr alloy-layers are prepared in self-lubricating knuckle bearing ball surface using plasma spraying process,
200 μ m-thick Al are prepared in NiCr alloyed layer using plasma spraying process2O3Ceramic layer.
Salt spray resistance test is carried out to coating, after testing 96h by GJB150.11, surface non-corroding.
Under the conditions of radial load 1500N, 300 beats/min of hunting frequency, swing angle ± 12 °, 504h, Al are examined2O3
Layer wear extent is≤4 μm, and antithesis pad wear amount is about 30 μm, and cracking does not occur for coating or severe marking is existing
As.It is good to pad visual examination, is not worn through.Spraying parameter is as shown in table 1 (to NiCr alloy-layers
And Al2O3Ceramic layer is applicable in)：
1 plasma spray process parameter of table
| Parameter | NiCr | Al2O3 |
| Argon gas (slpm) | 55 | 50 |
| Hydrogen (slpm) | 10 | 10 |
| Electric current (A) | 600 | 660 |
| Power (kW) | 43 | 49 |
| Spray distance (mm) | 120 | 110 |
| Spray direction and bearing ball surface angle (°) | 45 | 45 |
Embodiment 2
75 μ m-thick NiCr alloy-layers are prepared in self-lubricating knuckle bearing ball surface using plasma spraying process,
300 μ m-thick Al are prepared in NiCr alloyed layer using plasma spraying process2O3Ceramic layer.
Salt spray resistance test is carried out to coating, after testing 96h by GJB150.11, surface non-corroding.
Under the conditions of radial load 1500N, 300 beats/min of hunting frequency, swing angle ± 12 °, 622h, Al are examined2O3
Layer wear extent is≤6.5 μm, and antithesis pad wear amount is about 50 μm, and cracking does not occur for coating or severe marking is existing
As.It is good to pad visual examination, is not worn through.Spraying parameter is as shown in table 2 (to NiCr alloy-layers
And Al2O3Ceramic layer is applicable in)：
2 plasma spray process parameter of table
| Parameter | NiCr | Al2O3 |
| Argon gas (slpm) | 60 | 49 |
| Hydrogen (slpm) | 9 | 7 |
| Electric current (A) | 580 | 650 |
| Power (kW) | 41 | 47 |
| Spray distance (mm) | 120 | 110 |
| Spray direction and bearing ball surface angle (°) | 50 | 50 |
Embodiment 3
50 μ m-thick NiCr alloy-layers are prepared in self-lubricating knuckle bearing ball surface using plasma spraying process,
350 μ m-thick Al are prepared in NiCr alloyed layer using plasma spraying process2O3Ceramic layer.
Salt spray resistance test is carried out to coating, after testing 96h by GJB150.11, surface non-corroding.
Under the conditions of radial load 1500N, 800 beats/min of hunting frequency, swing angle ± 6 °, 770h, Al are examined2O3
Layer wear extent is≤8 μm, and antithesis pad wear amount is about 90 μm, and cracking does not occur for coating or severe marking is existing
As.It is good to pad visual examination, is not worn through.Spraying parameter is as shown in table 3 (to NiCr alloy-layers
And Al2O3Ceramic layer is applicable in)：
3 plasma spray process parameter of table
| Parameter | NiCr | Al2O3 |
| Argon gas (slpm) | 65 | 49 |
| Hydrogen (slpm) | 8 | 8 |
| Electric current (A) | 620 | 660 |
| Power (kW) | 42 | 48 |
| Spray distance (mm) | 120 | 110 |
| Spray direction and bearing ball surface angle (°) | 55 | 55 |
Experiments have shown that aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat of the invention and its system
Preparation Method can improve facet joint bearing surface wear-resisting property, and extension oscillating bearing service life be (oscillating bearing
Service life is at least 1000h).
Claims (5)
1. a kind of preparation method of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat, feature
It is, includes the following steps：
(1) base material pre-processes；
Roughening and purified treatment are carried out to self-lubricating knuckle bearing ball surface；
(2) in self-lubricating knuckle bearing ball substrate surface thermal spray metal transition zone；
It is 45 °~90 ° that direction, which is sprayed, with the tangential angle of spherical surface；
The intermediate metal is nickel-chrome alloy layer or nickel alumin(i)um alloy layer, and thickness is 40~100 μm；
(3) in intermediate metal thermal spraying on surface alumina ceramic layer；
It is 45 °~90 ° that direction, which is sprayed, with the tangential angle of spherical surface；The thickness of the alumina ceramic layer be 200~
350μm；
(4) grinding and polishing photooxidation aluminium ceramic layer.
2. the system of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat as described in claim 1
Preparation Method, which is characterized in that in (1) the base material pretreatment, it is roughened process emergy blasting treatment,
Roughness Ra is 4~10 μm.
3. aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat as claimed in claim 1 or 2
Preparation method, which is characterized in that in (1) base material pretreatment, purified treatment uses ultrasonic cleaning.
4. the system of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat as described in claim 1
Preparation Method, which is characterized in that in self-lubricating knuckle bearing ball substrate surface plasma spray coating nickel-chrome alloy layer
Or nickel alumin(i)um alloy layer, plasma gas flow be 50~70slpm of argon gas, 8~12slpm of hydrogen, electric current 550~
650A, 40~46kW of power, 95~135mm of spray distance；It is sprayed in alloy transition layer surface plasma
Alumina ceramic layer is applied, plasma gas flow is 40~60slpm of argon gas, 7~14slpm of hydrogen, electric current
600~680A, 45~50kW of power, 85~125mm of spray distance.
5. the system of aviation high speed light loading self-lubricating knuckle bearing abrasion-proof ceramic coat as described in claim 1
Preparation Method, which is characterized in that in (4), alumina layer mill be polished to surface roughness Ra reach 0.2~
0.3μm。
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| CN107620024A (en) * | 2017-09-07 | 2018-01-23 | 中国科学院上海硅酸盐研究所 | A kind of marine anticorrosion inorganic coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107620024A (en) * | 2017-09-07 | 2018-01-23 | 中国科学院上海硅酸盐研究所 | A kind of marine anticorrosion inorganic coating and preparation method thereof |
| CN107620024B (en) * | 2017-09-07 | 2019-09-13 | 中国科学院上海硅酸盐研究所 | A kind of marine anticorrosion inorganic coating and preparation method thereof |
| CN111531158A (en) * | 2020-06-16 | 2020-08-14 | 江苏兴湖耐火材料有限公司 | Manufacturing method of high-strength scouring-resistant stopper rod for continuous casting |
| CN111531158B (en) * | 2020-06-16 | 2021-08-13 | 江苏兴湖耐火材料有限公司 | Manufacturing method of high-strength scouring-resistant stopper rod for continuous casting |
| CN112389203A (en) * | 2020-10-22 | 2021-02-23 | 北京中车赛德铁道电气科技有限公司 | Wear-resisting metal bow angle of pantograph with keep apart buffer layer |
| CN112680687A (en) * | 2020-11-30 | 2021-04-20 | 中国科学院上海硅酸盐研究所 | Corrosion-resistant and insulating ceramic composite coating and preparation method thereof |
| CN112680687B (en) * | 2020-11-30 | 2022-01-04 | 中国科学院上海硅酸盐研究所 | Corrosion-resistant and insulating ceramic composite coating and preparation method thereof |
| CN115305434A (en) * | 2022-08-11 | 2022-11-08 | 福建阿石创新材料股份有限公司 | Method for preparing ceramic coating on surface of thin-wall protective cover and protective cover with coating |
| CN115305434B (en) * | 2022-08-11 | 2024-05-24 | 福建阿石创新材料股份有限公司 | Method for preparing ceramic coating on surface of thin-wall protective cover and protective cover with coating |
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