CN111621759A - Solid-liquid composite lubricating system for reducing friction coefficient of moving part - Google Patents
Solid-liquid composite lubricating system for reducing friction coefficient of moving part Download PDFInfo
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- CN111621759A CN111621759A CN202010497783.4A CN202010497783A CN111621759A CN 111621759 A CN111621759 A CN 111621759A CN 202010497783 A CN202010497783 A CN 202010497783A CN 111621759 A CN111621759 A CN 111621759A
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 48
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 239000007787 solid Substances 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- 238000000151 deposition Methods 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 12
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000002199 base oil Substances 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 4
- 239000002861 polymer material Substances 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 30
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 238000004544 sputter deposition Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 229920013639 polyalphaolefin Polymers 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000037452 priming Effects 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- TZHYBRCGYCPGBQ-UHFFFAOYSA-N [B].[N] Chemical compound [B].[N] TZHYBRCGYCPGBQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000010008 shearing Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 239000011807 nanoball Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 15
- 230000007613 environmental effect Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 241000234282 Allium Species 0.000 description 2
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/024—Deposition of sublayers, e.g. to promote adhesion of the coating
- C23C14/025—Metallic sublayers
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/0605—Carbon
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0623—Sulfides, selenides or tellurides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3485—Sputtering using pulsed power to the target
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
- C10M2227/061—Esters derived from boron
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Abstract
The invention relates to a solid-liquid composite lubricating system for reducing friction coefficient of a moving part, which is formed by compounding a solid lubricating film and lubricating oil, wherein the solid lubricating film is prepared by depositing on the surface of a metal, ceramic or polymer material by a high-power pulse unbalanced magnetron sputtering technology; the solid lubricating film is one of a diamond-like carbon film, a molybdenum disulfide film and a titanium nitride film; the lubricating oil is prepared by mixing base oil and additives according to the weight ratio of 200: 1-100: 5 in a mass ratio. The invention can form the abrasive dust with a low-friction nano ball structure on the surface interface of the moving part, effectively reduce the contact area of the moving part in the friction process, reduce the friction shearing acting force, and finally obviously reduce the friction coefficient and the wear rate of the moving part, thereby achieving the purposes of prolonging the service life and improving the reliability of the moving part and solving the problem that the traditional automobile, engineering machinery, high-grade numerical control machine tool and the like can not meet the requirements of long service life and high reliability.
Description
Technical Field
The invention relates to the fields of surface treatment and service life prolonging of mechanical moving parts and the like, in particular to a solid-liquid composite lubricating system for reducing the friction coefficient of the moving parts.
Background
The miniaturization and heavy-duty development of machinery puts higher and higher requirements on the lubricating technology. Conventional liquid lubrication techniques exhibit more and more limitations, such as insufficient load bearing capacity, and liquid lubrication is not free from various additives. The current additives are also based on the S-, P-type, which, while providing good lubrication, also create serious environmental problems. The solid lubrication technology has the main advantages of high bearing capacity and small environmental pressure. However, there are many technical problems to be overcome to achieve complete solid lubrication of the entire mechanical system and it is not economically feasible.
In order to achieve the purpose of taking economic benefits and environmental protection into consideration, people pay attention to the combination of a solid-liquid composite lubricating technology in more and more fields, such as the lubrication of automobile engines, the lubrication of space vehicles and the like. The solid lubricating film such as a diamond-like carbon film, a molybdenum disulfide film, a titanium nitride film and the like has the advantages of low friction, abrasion resistance, corrosion resistance, chemical inertness and the like, and attracts the attention of a large number of scientific research personnel and engineering technical personnel. The tribological behavior of solid lubricating films is highly susceptible to environmental factors. By adopting solid-liquid composite lubrication, the solid lubricating film can be separated from the surrounding environment, and meanwhile, when the liquid lubricant fails, the solid lubricating film can play a role in reducing friction. Therefore, the solid-liquid composite lubricating system is reasonably designed on the surface of the moving part, so that the purposes of effectively reducing the contact area of the moving part in the friction process and reducing the friction shearing acting force are achieved, and finally the friction coefficient and the wear rate of the moving part are obviously reduced.
Disclosure of Invention
The invention aims to provide a solid-liquid composite lubricating system with excellent performance and capable of reducing the friction coefficient of a moving part.
In order to solve the problems, the invention provides a solid-liquid composite lubricating system for reducing the friction coefficient of a moving part, which is characterized in that: the system is composed of a solid lubricating film and lubricating oil which are prepared by depositing on the surface of a metal, ceramic or polymer material by a high-power pulse unbalanced magnetron sputtering technology; the solid lubricating film is one of a diamond-like carbon film, a molybdenum disulfide film and a titanium nitride film; the lubricating oil is prepared by mixing base oil and additives according to the weight ratio of 200: 1-100: 5 in a mass ratio.
The solid lubricating film is formed by sputtering metal titanium or chromium on a diamond-like carbon film by adopting high-power pulse sputtering to serve as a priming layer, depositing for 10-30 min, and introducing methane and argon with the purity of more than 99.99%, wherein the pressure ratio of the methane to the argon is 1: 1-1: 3; and adjusting the pulse bias voltage to 100-300V, the graphite target current to 3-5A and the time to 50-200 min to obtain the film with the thickness of 1-3 microns.
The solid lubricating film is formed by sputtering molybdenum metal on a molybdenum disulfide film by using high-power pulses to form a bottom layer, depositing for 10-30 min, introducing argon with the purity of more than 99.99%, adjusting the pulse bias voltage to 400-600V, adjusting the molybdenum disulfide target current to 6-9A, and keeping the time to 50-200 min, so as to obtain the film with the thickness of 1-3 microns.
The solid lubricating film is prepared by sputtering metal titanium or chromium on a titanium nitride film by adopting high-power pulse sputtering as a priming layer, depositing for 10-30 min, and introducing nitrogen and argon with the purity of more than 99.99%, wherein the pressure ratio of the nitrogen to the argon is 2: 1-5: 1; and adjusting the pulse bias voltage to 800-1000V, the titanium target current to 10-12A and the time to 50-200 min to obtain the film with the thickness of 2-5 microns.
The base oil refers to Polyalphaolefin (PAO) or alkane mineral oil.
The additive refers to boron nitrogen compound.
Compared with the prior art, the invention has the following advantages:
1. the diamond-like carbon film has an ultralow friction coefficient in the atmosphere, and the molybdenum disulfide has a two-dimensional layered structure formed by Van der Waals force among molecules and a low friction coefficient; titanium nitride has high hardness and wear resistance characteristics. Therefore, the solid-oil composite lubricating system consisting of the solid lubricating film and the lubricating oil can form low-friction nano ball structure abrasive dust on a moving interface, effectively reduce the contact area of a moving part in the friction process, reduce the friction shearing acting force and finally obviously reduce the friction coefficient and the wear rate of the moving part.
2. The system obtained by the invention is adjusted between 0.01 and 0.04 in the friction coefficient under atmospheric conditions, and can achieve the purpose of improving the long service life and high reliability of moving parts, thereby solving the problem that the existing automobiles, engineering machinery, high-grade numerical control machines and the like cannot meet the requirements of long service life and high reliability.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing the reduction of friction coefficient after adding a solid-liquid composite lubrication system in the friction process of the present invention (stage I is the friction coefficient after only using the solid lubrication, and stage II is the friction coefficient after using the solid-liquid composite lubrication system).
FIG. 2 shows that the (100) plane of the graphite structure is bent due to the presence of B element generated on the surface during the rubbing process of the present invention, and finally the carbon nano onion structure is formed during the rubbing process.
Detailed Description
A solid-liquid composite lubricating system for reducing friction coefficient of moving parts is composed of a solid lubricating film prepared by depositing on the surface of metal, ceramic or polymer material by high-power pulse unbalanced magnetron sputtering technique and lubricating oil. The solid lubricating film is one of a diamond-like carbon film, a molybdenum disulfide film and a titanium nitride film; the lubricating oil is base oil and additives, wherein the weight ratio of the base oil to the additives is 200: 1-100: 5 in a mass ratio.
Example 1 a solid-liquid composite lubricating system for reducing the friction coefficient of moving parts, which system is composed of a solid lubricating film and a lubricating oil.
Wherein: the solid lubricating film is formed by sputtering metal titanium or chromium on a diamond-like carbon film by adopting high-power pulse to serve as a priming layer, and depositing the diamond-like carbon film on the surface of stainless steel after depositing for 10-30 min. Introducing methane and argon with the purity of more than 99.99%, wherein the gas pressure ratio of the methane to the argon is 1: 1; and adjusting the pulse bias voltage to 300V, the graphite target current to 5A and the time to 120min to obtain the film with the thickness of 2.3 microns.
The lubricating oil is poly α olefin (PAO 4) and additive (R)1-CO-N-C2H4O2-B-OR2Wherein R is1、R2Is an alkane chain) According to the following steps of 200: 1, and the weight ratio is prepared.
The solid-liquid composite lubrication system obtained by the invention was subjected to a friction test under the conditions of a load of 10N and a frequency of 5Hz using GCr15 bearing steel as a friction couple, and the results are shown in FIG. 1. The friction coefficient of the stage I is 0.07 by adopting solid lubrication friction only, and the friction coefficient of the stage II is reduced to 0.01 by adopting a solid-liquid composite lubrication system. Compared with GCr15 bearing steel and stainless steel which do not adopt solid-liquid composite lubrication (friction coefficient is 0.5), the friction coefficient is reduced by 98%. FIG. 2 shows that the (100) plane of the graphite structure is bent due to the presence of B element generated on the surface during the rubbing process of the present invention, and finally the carbon nano onion structure is formed during the rubbing process.
Example 2a solid-liquid composite lubricating system for reducing the friction coefficient of moving parts, which system is composed of a solid lubricating film and a lubricating oil.
Wherein: the solid lubricating film is formed by depositing a molybdenum disulfide film on the surface of tool steel after depositing for 15min by using high-power pulse sputtering metal molybdenum as a priming layer. And introducing argon with the purity of more than 99.99 percent, adjusting the pulse bias voltage to 400V, and obtaining the film with the thickness of 2.1 microns by regulating the current of the molybdenum disulfide target to 8A for 100 min.
The lubricating oil refers to alkane mineral oil and additive (R)1-CO-N-C2H4O2-B-OR2Wherein R is1、R2An alkane chain) as 100: 5 in a mass ratio.
The aluminum oxide is used as a friction couple, a friction test is carried out on the solid-liquid composite lubricating system obtained by the invention for 60min under the conditions that the load is 10N and the frequency is 10Hz, and the friction coefficient is 0.03. Compared with the friction between alumina and tool steel which are not lubricated by solid-liquid combination (the friction coefficient is 0.4), the friction coefficient is reduced by 92.5 percent.
Example 3 a solid-liquid composite lubricating system for reducing the coefficient of friction of moving parts, which system consists of a solid lubricating film and a lubricating oil.
Wherein: the solid lubricating film is formed by sputtering titanium nitride film with high power pulse to form titanium or chromium base layer, and depositing for 20min to deposit the titanium nitride film on the surface of stainless steel. Introducing nitrogen and argon with the purity of more than 99.99%, wherein the pressure ratio of the nitrogen to the argon is 2: 1; and adjusting the pulse bias voltage to 800V, the titanium target current to 10A and the time to 80min to obtain the film with the thickness of 1.5 microns.
The lubricating oil is poly α olefin (PAO 10) and additive (R)1-CO-N-C2H4O2-B-OR2Wherein R is1、R2Is an alkane chain) as follows 150: 2 in a mass ratio.
The silicon nitride is used as a friction pair, and a friction test is carried out on the solid-liquid composite lubricating system obtained by the invention for 60min under the conditions that the load is 5N and the frequency is 10Hz, wherein the friction coefficient is 0.04. Compared with the friction between silicon nitride and stainless steel which are not lubricated by solid-liquid combination (the friction coefficient is 0.5), the friction coefficient is reduced by 94 percent.
Claims (6)
1. A solid-liquid composite lubricating system for reducing friction coefficient of moving parts is characterized in that: the system is composed of a solid lubricating film and lubricating oil which are prepared by depositing on the surface of a metal, ceramic or polymer material by a high-power pulse unbalanced magnetron sputtering technology; the solid lubricating film is one of a diamond-like carbon film, a molybdenum disulfide film and a titanium nitride film; the lubricating oil is prepared by mixing base oil and additives according to the weight ratio of 200: 1-100: 5 in a mass ratio.
2. The solid-liquid composite lubricating system for reducing the friction coefficient of a moving part according to claim 1, characterized in that: the solid lubricating film is formed by sputtering metal titanium or chromium on a diamond-like carbon film by adopting high-power pulse sputtering to serve as a priming layer, depositing for 10-30 min, and introducing methane and argon with the purity of more than 99.99%, wherein the pressure ratio of the methane to the argon is 1: 1-1: 3; and adjusting the pulse bias voltage to 100-300V, the graphite target current to 3-5A and the time to 50-200 min to obtain the film with the thickness of 1-3 microns.
3. The solid-liquid composite lubricating system for reducing the friction coefficient of a moving part according to claim 1, characterized in that: the solid lubricating film is formed by sputtering molybdenum metal on a molybdenum disulfide film by using high-power pulses to form a bottom layer, depositing for 10-30 min, introducing argon with the purity of more than 99.99%, adjusting the pulse bias voltage to 400-600V, adjusting the molybdenum disulfide target current to 6-9A, and keeping the time to 50-200 min, so as to obtain the film with the thickness of 1-3 microns.
4. The solid-liquid composite lubricating system for reducing the friction coefficient of a moving part according to claim 1, characterized in that: the solid lubricating film is prepared by sputtering metal titanium or chromium on a titanium nitride film by adopting high-power pulse sputtering as a priming layer, depositing for 10-30 min, and introducing nitrogen and argon with the purity of more than 99.99%, wherein the pressure ratio of the nitrogen to the argon is 2: 1-5: 1; and adjusting the pulse bias voltage to 800-1000V, the titanium target current to 10-12A and the time to 50-200 min to obtain the film with the thickness of 2-5 microns.
5. The solid-liquid composite lubricating system for reducing the friction coefficient of a moving part according to claim 1, characterized in that: the base oil refers to poly-alpha-olefin or alkane mineral oil.
6. The solid-liquid composite lubricating system for reducing the friction coefficient of a moving part according to claim 1, characterized in that: the additive refers to boron nitrogen compound.
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