CN102041466A - High-performance high temperature solid self-lubricating coating and preparation method thereof - Google Patents
High-performance high temperature solid self-lubricating coating and preparation method thereof Download PDFInfo
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- CN102041466A CN102041466A CN2010102419897A CN201010241989A CN102041466A CN 102041466 A CN102041466 A CN 102041466A CN 2010102419897 A CN2010102419897 A CN 2010102419897A CN 201010241989 A CN201010241989 A CN 201010241989A CN 102041466 A CN102041466 A CN 102041466A
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- 239000007787 solid Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 60
- 238000000576 coating method Methods 0.000 title claims abstract description 20
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 96
- 239000002131 composite material Substances 0.000 claims abstract description 40
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910001120 nichrome Inorganic materials 0.000 claims abstract description 29
- 230000005496 eutectics Effects 0.000 claims abstract description 28
- 238000005516 engineering process Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000009689 gas atomisation Methods 0.000 claims abstract description 14
- 238000007750 plasma spraying Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims abstract description 7
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 39
- 229910016036 BaF 2 Inorganic materials 0.000 claims description 32
- 238000000889 atomisation Methods 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 239000000470 constituent Substances 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 2
- 239000011888 foil Substances 0.000 abstract description 16
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract 4
- 229910001632 barium fluoride Inorganic materials 0.000 abstract 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 3
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 13
- 239000003570 air Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 238000012876 topography Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000003001 depressive effect Effects 0.000 description 6
- 238000004611 spectroscopical analysis Methods 0.000 description 6
- 208000035126 Facies Diseases 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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Abstract
The invention relates to the field of solid lubricating, in particular to a high-performance high temperature solid self-lubricating coating and a preparation method thereof, aiming at solving the problem that parts of a machine (such as a foil air bearing) are worn when in operation from low temperature (minus 55 DEG C) to high temperature (800 DEG C). The high temperature solid self-lubricating composite coating adopts a composite powder composed of NiCr, Cr2O3, Ag and eutectic BaF2/CaF2, wherein NiCr is an adhesive, Cr2O3 is a wear-resistant phase, Ag is a low temperature lubricating agent, and the eutectic BaF2/CaF2 is a high temperature lubricating agent. The NiCr powder, Ag powder and the eutectic BaF2/CaF2 powder are all prepared by adopting the ultrasonic gas atomization technology, and the composite powder is prepared by adopting a mechanical mixing method. The high temperature solid self-lubricating coating is prepared by adopting the atmosphere plasma spraying technology. The high temperature solid self-lubricating coating in the invention can avoid or reduce wear of the parts of the machine running at high speed and high temperature (such as wear of a foil and a shaft of the foil air bearing), thus expanding working temperature and speed of the machine in operation and having important industrial application value.
Description
Technical field
The present invention relates to the solid lubrication field, be specially a kind of high-performance high-temp solid self-lubricating coat in use and preparation method thereof.
Background technology
Foil air bearing (FAB) is the present core texture of advanced no oil turbine technology, it in the normal operation process with ambient air as lubricant, compare with hydrostatic gas-lubricated bearing, do not need extra airing system, system is simplified; Compare with the traditional oils oiling system, removed oil lubrication system, machinery wieght reduces significantly, reduces friction power loss in addition, to advantages such as working medium and environmental nonpollutions, broken the restriction of working temperature and speed simultaneously, thereby performance is improved significantly." use of this technology can make engine weight alleviate 15%, and cost reduces 20%, and maintenance cost reduces 50%, and power improves 20% " thought by NASA (NASA).But in startup and docking process, paillon foil and between centers are not enough to form the work air film, and the two produces sliding contact, causes heavy wear, and foil air bearing can't steady running.Traditional solid lubricant is as graphite, MoS
2, use temperature such as PTFE can seriously lose lubrication because of oxidation when being higher than 300 ℃, can not satisfy the requirement that foil air bearing high temperature is used.Therefore, provide a kind of new type high temperature properties of solid self-lubricant coating, avoid or reduce the wearing and tearing of paillon foil in the foil air bearing and axle,, have important industrial application value to guarantee foil air bearing steady running under the high temperature and high speed environment.
Summary of the invention
The object of the present invention is to provide high-temp solid self-lubricating powder, coating of a kind of excellent property and preparation method thereof, solve low temperature (55 ℃) to high temperature (800 ℃) wear problem of component in the running machinery (as foil air bearing) down.
Technical scheme of the present invention is as follows:
A kind of high-performance high-temp solid self-lubricating coat in use, this high-temp solid self-lubricating compound coating are that composite powder adopts air plasma spraying to form, and described composite powder is by NiCr powdered alloy, Cr
2O
3Powder, Ag powder and eutectic BaF
2/ CaF
2Powder constituent, wherein the NiCr powdered alloy is a tackiness agent, Cr
2O
3Powder is wear-resisting phase, and the Ag powder is a low-temperature grease, eutectic BaF
2/ CaF
2Powder is a high temperature lubricant.In the high-temp solid self-lubricating composite powder, each constituent mass mark is as shown in table 1.
Each component concentration in the table 1 high-temp solid self-lubricating composite powder
| Component | The NiCr powdered alloy | ?Cr 2O 3Powder | The Ag powder | Eutectic BaF 2/CaF 2Powder |
| Massfraction (%) | 45-70 | ?10-30 | 5-20 | 5-20 |
Wherein, Ni accounts for 60%-90% in the NiCr powdered alloy, and all the other are Cr (massfraction), and the NiCr powdered alloy is to adopt the preparation of ultrasonic gas atomization technology.The Ag powder is to adopt the preparation of ultrasonic gas atomization technology.
Eutectic BaF
2/ CaF
2Powder morphology is to influence the mobile and inhomogeneity principal element of high-temp solid self-lubricating composite powder.Adopt polygon eutectic BaF for solving
2/ CaF
2The mobile difference of composite powder during powder and the problem that the compound coating homogeneity of structure is poor, coating performance is low that causes, in this high-temp solid self-lubricating composite powder, eutectic BaF
2/ CaF
2Powder is to adopt the ultrasonic gas atomization technology to be prepared from, and its composition is BaF
2Account for 60%-70%, all the other are CaF
2(massfraction).The eutectic BaF that makes
2/ CaF
2Powder is the sphere of rule, and the atomization process parameter is: atomizing pressure 3-10MPa, atomization temperature 1300-1450 ℃, vacuum tightness 5-12Pa, melt flow 2-5kg/min.
The NiCr powdered alloy is to adopt the ultrasonic gas atomization technology to be prepared from, and the atomization process parameter is: atomizing pressure 3-9MPa, atomization temperature 1450-1580 ℃, vacuum tightness 5-15Pa, melt flow 3-7kg/min.
The Ag powder is to adopt the ultrasonic gas atomization technology to be prepared from, and the atomization process parameter is: atomizing pressure 4-9MPa, atomization temperature 1050-1180 ℃, vacuum tightness 5-10Pa, melt flow 3-6kg/min.
Press the massfraction of each constituent element in the composite powder, with NiCr powdered alloy, Cr
2O
3Powder, Ag powder and eutectic BaF
2/ CaF
2Powder makes high-temp solid self-lubricating composite powder through mechanical batch mixing mixing 6-15h; The flowability of composite powder is 25-30s/50g, and loose density is 3.2-3.7g/cm
3
This high-temp solid self-lubricating coat in use adopts the atmospheric plasma spraying technology preparation, and its preparation technology is as shown in table 2.
Table 2 high-temp solid self-lubricating coat in use preparation technology
Among the present invention, the high-performance high-temp solid self-lubricating coat in use that obtains is the single-layer coating structure, the thickness range of self-lubricating coat in use is 0.10-0.70mm, the bonding strength scope of self-lubricating coat in use is 28-40MPa, joining secondary self-lubricating coat in use with Cu base alloy is 0.10-0.50 from the range of friction coefficients of room temperature to 650 ℃, and self-lubricating coat in use is 0.45-3.60 * 10 from the wear rate scope of room temperature to 650 ℃
-4Mm
3/ Nm.
The invention has the beneficial effects as follows:
1, high-temp solid self-lubricating coat in use of the present invention can improve the temperature of foil air bearing steady running, satisfies the requirement that foil air bearing high temperature is used.
2, the wearing and tearing of paillon foil in the foil air bearing and axle can be avoided or reduce to high-temp solid self-lubricating coat in use of the present invention, to guarantee foil air bearing steady running under 800 ℃, 100000r/min high temperature and high speed environment, has important industrial application value.
3, high-temp solid self-lubricating coat in use of the present invention can promote the use of in the running machinery under other high temperature and high speed environment, to reduce the friction and wear between component.
4, the preparation of high-temp solid self-lubricating coat in use of the present invention can inspire the development of more high-temperature solid lubrication compound coatings, promotes the development in solid lubrication field.
Description of drawings
Fig. 1 is the BaF of embodiment 1 ultrasonic gas atomization preparation
2/ CaF
2Powder SEM pattern.
Fig. 2 is the high-temp solid self-lubricating composite powder SEM pattern of embodiment 1 preparation.
Fig. 3 is the high-temp solid self-lubricating compound coating SEM pattern of embodiment 1 preparation.
Fig. 4 is the high-temp solid self-lubricating compound coating composition analysis result of embodiment 1 preparation.Wherein, a) figure is the grey color part of Fig. 3; B) figure is the black part of Fig. 3; C) figure is the white portion of Fig. 3; D) figure is the Dark grey part of Fig. 3.
Fig. 5 is the high-temp solid self-lubricating compound coating facies analysis result of embodiment 1 preparation.
Fig. 6 is the BaF of embodiment 2 ultrasonic gas atomizations preparation
2/ CaF
2Powder SEM pattern.
Fig. 7 is the high-temp solid self-lubricating composite powder SEM pattern of embodiment 2 preparations.
Fig. 8 is the high-temp solid self-lubricating compound coating SEM pattern of embodiment 2 preparations.
Fig. 9 is the high-temp solid self-lubricating compound coating composition analysis result of embodiment 2 preparations.Wherein, a) figure is the grey color part of Fig. 8; B) figure is the black part of Fig. 8; C) figure is the white portion of Fig. 8; D) figure is the Dark grey part of Fig. 8.
Figure 10 is the high-temp solid self-lubricating compound coating facies analysis result of embodiment 2 preparations.
Embodiment:
The preparation method of high-performance high-temp solid self-lubricating coat in use of the present invention, concrete steps are as follows:
Step 1: by drafting BaF
2/ CaF
2Ingredient composition also mixes, vacuum induction melting NiCr alloy pig.
Step 2: adopt the ultrasonic gas atomization legal system to be equipped with eutectic BaF
2/ CaF
2Powder, NiCr powder, Ag powder.
Step 3: adopt the BaF of scanning electron microscope to step 2 preparation
2/ CaF
2Powder carries out tissue topography to be observed.
Step 4: by the massfraction and the granularity of each constituent element in the composite powder of drafting, with NiCr, Cr
2O
3, Ag and eutectic BaF
2/ CaF
2Powder mechanically mixing 6-15h makes high-temp solid self-lubricating composite powder.
Step 5: adopt the scanning electron microscope have energy depressive spectroscopy that the composite powder of step 4 preparation is carried out tissue topography and observe and composition analysis.
Step 6: the composite powder of step 4 preparation is carried out flowability and loose density test.
Step 7: adopt the composite powder of step 4 preparation, utilize atmospheric plasma spraying technology to prepare the high-temp solid self-lubricating coat in use.
Step 8: adopt the scanning electron microscope have energy depressive spectroscopy that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out tissue topography and observe and composition analysis.
Step 9: adopt X-ray diffractometer that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out facies analysis.
Step 10: adopt tensile testing machine that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out the bonding strength test.
Step 11: adopt high temperature pin dish friction wear testing machine that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out the friction and wear behavior test.
Embodiment 1:
The preparation method of present embodiment high-performance high-temp solid self-lubricating coat in use, concrete steps are as follows:
Step 1: press BaF
2/ CaF
2Composition 68%BaF
2, 32%CaF
2Batching also mixes; Vacuum induction melting NiCr alloy pig, wherein Ni accounts for 80%, and all the other are Cr (massfraction).
Step 2: adopt the ultrasonic gas atomization legal system to be equipped with eutectic BaF
2/ CaF
2Powder, NiCr powder, Ag powder.Eutectic BaF
2/ CaF
2The atomization process parameter is: atomizing pressure 5MPa, 1350 ℃ of atomization temperatures, vacuum tightness 5Pa, melt flow 3kg/min.The atomization process parameter of NiCr powder is: atomizing pressure 5MPa, 1510 ℃ of atomization temperatures, vacuum tightness 10Pa, melt flow 5kg/min.The atomization process parameter of Ag powder is atomizing pressure 4MPa, 1120 ℃ of atomization temperatures, vacuum tightness 8Pa, melt flow 5kg/min.
Step 3: adopt the BaF of scanning electron microscope to step 2 preparation
2/ CaF
2Powder carries out tissue topography to be observed, the result as shown in Figure 1, as can be seen from the figure Zhi Bei BaF
2/ CaF
2Powder becomes the sphere of rule.
Step 4: according to the massfraction and the granularity of each constituent element in the table 3, with NiCr, Cr
2O
3, Ag and eutectic BaF
2/ CaF
2Powder mechanically mixing 10h makes high-temp solid self-lubricating composite powder.
Each constituent element content and granularity in the table 3 high-temp solid self-lubricating composite powder
| The constituent element title | NiCr | Cr 2O 3 | Ag | Eutectic BaF 2/CaF 2 |
| Content (wt%) | 60 | 20 | 10 | 10 |
| Granularity (μ m) | 45-100 | 30-45 | 45-125 | 63-154 |
Step 5: adopt the scanning electron microscope have energy depressive spectroscopy that the composite powder of step 4 preparation is carried out tissue topography and observe and composition analysis, the result as shown in Figure 2, as can be seen from the figure each constituent element distribution uniform in Zhi Bei the composite powder.
Step 6: the composite powder of step 4 preparation is carried out flowability and loose density test, and the flowability of composite powder is 25.5s/50g, and loose density is 3.64g/cm
3
Step 7: adopt the composite powder of step 4 preparation, utilize conventional atmospheric plasma spraying technology to prepare the high-temp solid self-lubricating coat in use, preparation technology is as shown in table 4.The thickness of self-lubricating coat in use is 0.35-0.40mm.
Table 4 high-temp solid self-lubricating coat in use preparation technology parameter
Step 8: adopt the scanning electron microscope have energy depressive spectroscopy that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out tissue topography and observe and composition analysis, the result is shown in accompanying drawing 3, accompanying drawing 4, as can be seen from the figure Zhi Bei high-temp solid self-lubricating coat in use is typical layered structure, wherein grey color part contains Ni, Cr element, black partly contains Cr, O element, white portion contains the Ag element, and Dark grey partly contains Ba, Ca, F element.
Step 9: adopt X-ray diffractometer that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out facies analysis, the result as shown in Figure 5, as can be seen from the figure Zhi Bei high-temp solid self-lubricating coat in use is by Ni (Cr), Cr
2O
3, Ag and (Ba, Ca) F
2Constitute.
Step 10: adopt tensile testing machine that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out the bonding strength test, anchoring strength of coating reaches 30.4MPa.
Step 11: adopt high temperature pin disc type friction and wear tester that the high-temp solid self-lubricating coat in use of step 7 preparation and the friction and wear behavior between Cu-4Al are tested, the result is as shown in table 5.
Friction and wear behavior between table 5 high-temp solid self-lubricating coat in use and Cu-4Al
Embodiment 2:
The preparation method of present embodiment high-performance high-temp solid self-lubricating coat in use, concrete steps are as follows:
Step 1: press BaF
2/ CaF
2Composition 62%BaF
2, 38%CaF
2Batching also mixes; Vacuum induction melting NiCr alloy pig, wherein Ni accounts for 75% (massfraction), and all the other are Cr.
Step 2: adopt the ultrasonic gas atomization legal system to be equipped with eutectic BaF
2/ CaF
2Powder, NiCr powder, Ag powder.Eutectic BaF
2/ CaF
2The atomization process parameter is: atomizing pressure 10MPa, 1400 ℃ of atomization temperatures, vacuum tightness 5Pa, melt flow 4kg/min.The atomization process parameter of NiCr powder is: atomizing pressure 7MPa, 1550 ℃ of atomization temperatures, vacuum tightness 8Pa, melt flow 6kg/min.The atomization process parameter of Ag powder is atomizing pressure 5MPa, 1150 ℃ of atomization temperatures, vacuum tightness 7Pa, melt flow 4kg/min.
Step 3: adopt the BaF of scanning electron microscope to step 2 preparation
2/ CaF
2Powder carries out tissue topography to be observed, the result as shown in Figure 6, as can be seen from the figure Zhi Bei BaF
2/ CaF
2Powder becomes the sphere of rule.
Step 4: according to the massfraction and the granularity of each constituent element in the table 6, with NiCr, Cr
2O
3, Ag and eutectic BaF
2/ CaF
2Powder mechanically mixing 12h makes high-temp solid self-lubricating composite powder.
Each constituent element content and granularity in the table 6 high-temp solid self-lubricating composite powder
| The constituent element title | NiCr | Cr 2O 3 | Ag | Eutectic BaF 2/CaF 2 |
| Content (wt%) | 60 | 20 | 10 | 10 |
| Granularity (μ m) | 75-125 | 45-75 | 63-125 | 45-100 |
Step 5: adopt the scanning electron microscope have energy depressive spectroscopy that the composite powder of step 4 preparation is carried out tissue topography and observe and composition analysis, the result as shown in Figure 7, as can be seen from the figure each constituent element distribution uniform in Zhi Bei the composite powder.
Step 6: the composite powder of step 4 preparation is carried out flowability and loose density test, and the flowability of composite powder is 26.3s/50g, and loose density is 3.60g/cm
3
Step 7: adopt the composite powder of step 4 preparation, utilize conventional atmospheric plasma spraying technology to prepare the high-temp solid self-lubricating coat in use, preparation technology is as shown in table 7.The thickness of self-lubricating coat in use is 0.40-0.45mm.
Table 7 high-temp solid self-lubricating coat in use preparation technology parameter
Step 8: adopt the scanning electron microscope have energy depressive spectroscopy that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out tissue topography and observe and composition analysis, the result is shown in accompanying drawing 8, accompanying drawing 9, as can be seen from the figure Zhi Bei high-temp solid self-lubricating coat in use is typical layered structure, wherein grey color part contains Ni, Cr element, black partly contains Cr, O element, white portion contains the Ag element, and Dark grey partly contains Ba, Ca, F element.
Step 9: adopt X-ray diffractometer that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out facies analysis, the result as shown in Figure 10, as can be seen from the figure Zhi Bei high-temp solid self-lubricating coat in use is by Ni (Cr), Cr
2O
3, Ag and (Ba, Ca) F
2Constitute.
Step 10: adopt tensile testing machine that the high-temp solid self-lubricating coat in use of step 7 preparation is carried out the bonding strength test, anchoring strength of coating reaches 32.4MPa.
Step 11: adopt high temperature pin disc type friction and wear tester that the high-temp solid self-lubricating coat in use of step 7 preparation and the friction and wear behavior between Cu-4Al are tested, the result is as shown in table 8.
Friction and wear behavior between table 8 high-temp solid self-lubricating coat in use and Cu-4Al
Claims (11)
1. high-performance high-temp solid self-lubricating coat in use is characterized in that: this high-temp solid self-lubricating compound coating is that composite powder adopts air plasma spraying to form, and described composite powder is by NiCr powdered alloy, Cr
2O
3Powder, Ag powder and eutectic BaF
2/ CaF
2Powder constituent, wherein the NiCr powdered alloy is a tackiness agent, Cr
2O
3Powder is wear-resisting phase, and the Ag powder is a low-temperature grease, eutectic BaF
2/ CaF
2Powder is a high temperature lubricant, and each constituent mass mark is in the composite powder:
NiCr powdered alloy 45-70%;
Cr
2O
3Powder 10-30%;
Ag powder 5-20%;
Eutectic BaF
2/ CaF
2Powder 5-20%.
2. according to the described high-performance high-temp solid of claim 1 self-lubricating coat in use, it is characterized in that: by massfraction, eutectic BaF
2/ CaF
2In the powder, BaF
2Account for 60%-70%, all the other are CaF
2
3. according to the described high-performance high-temp solid of claim 1 self-lubricating coat in use, it is characterized in that: by massfraction, in the NiCr powdered alloy, Ni accounts for 60%-90%, and all the other are Cr.
4. the preparation method according to the described high-performance high-temp solid of claim 1 self-lubricating coat in use is characterized in that: press the massfraction of each constituent element in the composite powder, with NiCr powdered alloy, Cr
2O
3Powder, Ag powder and eutectic BaF
2/ CaF
2Powder makes high-temp solid self-lubricating composite powder through mechanical batch mixing mixing 6-15h; Utilize atmospheric plasma spraying technology to prepare the high-temp solid self-lubricating coat in use.
5. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that: the NiCr powdered alloy is to adopt the ultrasonic gas atomization technology to be prepared from, the atomization process parameter is: atomizing pressure 3-9MPa, atomization temperature 1450-1580 ℃, vacuum tightness 5-15Pa, melt flow 3-7kg/min.
6. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that: the Ag powder is to adopt the ultrasonic gas atomization technology to be prepared from, the atomization process parameter is: atomizing pressure 4-9MPa, atomization temperature 1050-1180 ℃, vacuum tightness 5-10Pa, melt flow 3-6kg/min.
7. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that: eutectic BaF
2/ CaF
2Powder is to adopt the ultrasonic gas atomization technology to be prepared from, and the atomization process parameter is: atomizing pressure 3-10MPa, atomization temperature 1300-1450 ℃, vacuum tightness 5-12Pa, melt flow 2-5kg/min, eutectic BaF
2/ CaF
2Powder is a regular spherical.
8. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that the flowability of composite powder is 25-30s/50g, loose density is 3.2-3.7g/cm
3
9. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that, the air plasma spraying processing parameter of high-temp solid self-lubricating coat in use is: electric current 480-600A, voltage 32-52V, powder sending quantity 15-45g/min, powder feeding gas flow 4.0-7.5L/min, main air stream amount 38-43L/min, main atmospheric pressure 0.40-0.55MPa, inferior atmospheric pressure 0.25-0.40MPa, spray distance 80-140mm, 70 °-90 ° of spray angles.
10. according to the preparation method of the described high-performance high-temp solid of claim 4 self-lubricating coat in use, it is characterized in that: described high-temp solid self-lubricating coat in use is the single-layer coating structure, and the thickness range of high-temp solid self-lubricating coat in use is 0.10-0.70mm.
11. the preparation method according to the described high-performance high-temp solid of claim 4 self-lubricating coat in use is characterized in that: the bonding strength of self-lubricating coat in use is 28-40MPa; Join pair with Cu base alloy, self-lubricating coat in use is 0.10-0.50 from the frictional coefficient of room temperature to 650 ℃, and self-lubricating coat in use is 0.45-3.60 * 10 from the wear rate of room temperature to 650 ℃
-4Mm
3/ Nm.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277018A (en) * | 2011-07-20 | 2011-12-14 | 合肥工业大学 | High-temperature self-lubricating wear-resistant powder coating |
| CN103074561A (en) * | 2012-12-11 | 2013-05-01 | 北京矿冶研究总院 | Wide-temperature-range self-lubricating coating material and preparation method thereof |
| CN103540780A (en) * | 2012-07-12 | 2014-01-29 | 中国科学院兰州化学物理研究所 | Preparation method for high-intensity nickel-based high-temperature self-lubricating composite material |
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| CN104928611A (en) * | 2015-07-13 | 2015-09-23 | 中国人民解放军第二炮兵工程大学 | Wide temperature region viscosity corrosion resisting solid self-lubricating coating and preparation method thereof |
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| CN109881141A (en) * | 2019-03-12 | 2019-06-14 | 唐山学院 | NiCoCrAlY/Cr2O3-Ag-CaF2.BaF2High temperature solid self-lubricants wear-resistant coating |
| CN111057986A (en) * | 2019-12-31 | 2020-04-24 | 广东省新材料研究所 | Self-lubricating coating for wide temperature range, workpiece and preparation method of self-lubricating coating |
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| CN115029696A (en) * | 2022-07-03 | 2022-09-09 | 兰州乐博思新材料科技有限公司 | Preparation method of CoCrCuMoNi-based high-entropy alloy high-temperature self-lubricating wear-resistant coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102277018A (en) * | 2011-07-20 | 2011-12-14 | 合肥工业大学 | High-temperature self-lubricating wear-resistant powder coating |
| CN103540780A (en) * | 2012-07-12 | 2014-01-29 | 中国科学院兰州化学物理研究所 | Preparation method for high-intensity nickel-based high-temperature self-lubricating composite material |
| CN103540780B (en) * | 2012-07-12 | 2015-08-12 | 中国科学院兰州化学物理研究所 | A kind of preparation method of high-strength nickel base high temperature self lubricating composite material |
| CN103074561A (en) * | 2012-12-11 | 2013-05-01 | 北京矿冶研究总院 | Wide-temperature-range self-lubricating coating material and preparation method thereof |
| CN104278226A (en) * | 2013-07-02 | 2015-01-14 | 中国科学院兰州化学物理研究所 | Preparation technology for wide-temperature-range self-lubricating coating |
| CN104928611A (en) * | 2015-07-13 | 2015-09-23 | 中国人民解放军第二炮兵工程大学 | Wide temperature region viscosity corrosion resisting solid self-lubricating coating and preparation method thereof |
| CN104928611B (en) * | 2015-07-13 | 2017-07-18 | 中国人民解放军第二炮兵工程大学 | A kind of anti-stick erosion properties of solid self-lubricant coating of wide temperature range and preparation method thereof |
| CN106399904A (en) * | 2016-11-10 | 2017-02-15 | 无锡市明盛强力风机有限公司 | Solid-lubricated ball bearing and preparation method thereof |
| CN106567031A (en) * | 2016-11-10 | 2017-04-19 | 无锡市明盛强力风机有限公司 | Ball bearing with solid lubricant and preparation method of ball bearing |
| CN107868926B (en) * | 2017-11-20 | 2019-09-06 | 中国科学院兰州化学物理研究所 | A kind of preparation method of the anti-sticking wear-resisting coating of high temperature lubricating |
| CN107868926A (en) * | 2017-11-20 | 2018-04-03 | 中国科学院兰州化学物理研究所 | A kind of preparation method of the anti-sticking wear-resisting coating of high temperature lubricating |
| CN108441734A (en) * | 2018-03-16 | 2018-08-24 | 南京航空航天大学 | A kind of WC NEW TYPE OF COMPOSITEs lubricant coating and preparation method thereof |
| CN109373944A (en) * | 2018-12-04 | 2019-02-22 | 湖南大学 | A kind of air foil bearing air-film thickness measuring system based on ultrasound and method |
| CN109881141A (en) * | 2019-03-12 | 2019-06-14 | 唐山学院 | NiCoCrAlY/Cr2O3-Ag-CaF2.BaF2High temperature solid self-lubricants wear-resistant coating |
| CN109881141B (en) * | 2019-03-12 | 2021-06-08 | 唐山学院 | NiCoCrAlY/Cr2O3-Ag-CaF2.BaF2High-temperature solid self-lubricating wear-resistant coating |
| CN111139475A (en) * | 2019-07-04 | 2020-05-12 | 盐城百圣机械有限公司 | Preparation of self-lubricating coating suitable for middle-low temperature air bearing journal |
| CN111057986A (en) * | 2019-12-31 | 2020-04-24 | 广东省新材料研究所 | Self-lubricating coating for wide temperature range, workpiece and preparation method of self-lubricating coating |
| CN115029696A (en) * | 2022-07-03 | 2022-09-09 | 兰州乐博思新材料科技有限公司 | Preparation method of CoCrCuMoNi-based high-entropy alloy high-temperature self-lubricating wear-resistant coating |
| CN115075986A (en) * | 2022-07-20 | 2022-09-20 | 陕西空天动力研究院有限公司 | Jet propulsion device based on suspension ball socket spray pipe and working method thereof |
| CN115075986B (en) * | 2022-07-20 | 2022-11-22 | 陕西空天动力研究院有限公司 | Jet propulsion device based on suspension ball socket spray pipe and working method thereof |
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