FIELD: machine building.
SUBSTANCE: proposed antifriction coating comprises molybdenum disulphide and binder. Said binder represents organic silicon compound. Diamond nanoparticles are additionally introduced in coating composition.
EFFECT: higher operating temperatures and wear resistance.
5 cl, 1 ex
The technical field
The invention relates to the field of engineering, namely, anti-friction coatings used in bearings and other mates to reduce friction and wear on steel parts under the action of high temperatures and high loads, in particular when using coatings for gas-dynamic radar bearings.
Known antifriction composite coating (see RF patent №2211260)containing a solid lubricant containing molybdenum disulfide and graphite, and a binder based on epoxy resin, characterized in that the coating consists of three layers, the lower of which is adjacent to the substrate, made of a thickness of 10-15 μm of molybdenum, the upper consists of a solid lubricant, optionally containing cadmium oxide and has a thickness of 1-3 μm, and the intermediate layer contains a binder and a thickness of 15-50 microns.
The coating is operable in air and in water at temperatures from -100°C to +250°C and specific loads up to 20 kgf/mm2and has a coefficient of friction <0,1.
The disadvantage of analogue is the inability of its operation at temperatures above 250°C due to decomposition of epoxy resin and accelerated wear.
Characteristics of prototype
The closest analogues of is anti-friction solid lubricant coating (see RF patent №201800), containing molybdenum disulfide, colloidal graphite and a binder, characterized in that the coating as a binder contains epoxy-novolak varnish and additionally contains whiskers of silicon carbide - modification-ratio of length to diameter of 30-300 in the following ratio, wt.%:
Molybdenum disulfide 50-70
Colloidal graphite 7-20
Whiskers of silicon carbide -
length to the diameter of 30-300 0,15-1,1
Epoxy-novolak lacquer - rest.
The disadvantage of the prototype as well as the similar is the inability of its operation at temperatures above 250°C due to decomposition of epoxy-novolak varnish and accelerated wear.
Technical problem arising from the prior art, is to increase operating temperatures antifrictional coverage and increase its durability.
The technical problem is solved due to the fact that the claimed anti-friction coating contains molybdenum disulfide and a binder. Differs in that it uses a silicone binder. Additionally included in the diamond nanoparticles.
The use of silicon binder allows to increase the working temperature of the claimed coating without decomposition.
With the introduction of the diamond particles in the coating composition of the diamond nanoparticles, the region is giving a high surface energy, occurs on the one hand the seal of binding molecules around the nanoparticles, and on the other hand - grip of these diamond nanoparticles protected with a metal surface. This leads to increased wear resistance of the inventive coating in comparison with the prototype and increased operating temperatures up to 500°C.
Diamond nanoparticles introduced into the composition in an amount of 0.1 to 0.2% by weight of the coating, which is the optimal amount of diamond nanoparticles for tasks.
As organosilicon binder resin is used, which is part of the lacquer KO-08, which is one of the use cases silicone binder in the inventive coating.
The coating thickness of 25-30 μm, which is sufficient for the tasks.
The size of the diamond nanoparticles is 4-6 nm. The proposed device is new, because it is not known from the prior art.
The invention involves an inventive step, since it is for the expert is not obvious from the prior art.
An example of specific performance
Consider using antifrictional heat-resistant coatings for gas-dynamic radar bearings operating at temperatures up to 500°C.
For the preparation of anti-friction coatings were used the following components:
Molybdenum disulfide brand DM-1 TU 48-19-133-85.
- Silicone binder - lacquer KO-08, GOST 15081-78 representing a solution of polymethylphenyl siloxane resin in toluene, GOST 9880-76.
Powder of diamond nanoparticles with a size of 5 nm.
Presents the components are mixed. Is added to the solvent - toluene to the desired viscosity of the mixture - 12-14 sec VZ-4. The resulting composition is applied on a protected surface with the spray gun in two layers with intermediate drying between coats at 20 minutes at a temperature of 15-35°C. After application of the second layer second layer first dried for 20 minutes at a temperature of 15-35ºC, and then produce a final drying at a temperature of 150-180°C for 60 minutes, the coating Thickness should be 25-30 microns.
The use of silicone lacquer KO-08 allows you to increase the operating temperature of the claimed coating without its decomposition to 500°C and loss of mechanical strength.
With the introduction of the diamond particles in the coating composition of diamond nanoparticles with high surface energy occurs on the one hand the seal of binding molecules, and on the other hand - grip of these diamond nanoparticles protected with a metal surface. This leads to increased wear resistance of the inventive coating in comparison with the prototype and increased operating temperatures up to 500ºC.
Thus, thanks to the new GSS is upnote essential features of the claimed device to perform fully the goal of the project, resulting from the prior art, and therefore, it meets the criterion of "industrial applicability".
The invention is undergoing pilot testing.
Planned repetitive use of the inventive coatings in gas production and gas processing industry, in particular to cover petal gas-dynamic bearings used in domestic gas turbines, including the turboexpanders.
1. Anti-friction coating containing molybdenum disulfide and a binder, characterized in that the used silicone binder, optionally included in the diamond nanoparticles.
2. Anti-friction coating according to claim 1, wherein the diamond nanoparticles introduced in an amount of 0.1-0.2% of the total mass.
3. Anti-friction coating according to claim 1, characterized in that the organosilicon binder resin is used, which is part of the lacquer KO-08.
4. Anti-friction coating according to claim 1, characterized in that the coating thickness of 25-30 μm.
5. Anti-friction coating according to claim 1, characterized in that the size of the diamond nanoparticles is 4-6 nm.
FIELD: machine building.
SUBSTANCE: method for manufacturing anti-friction layer of sleeve half-bearing consists in oversized boring after sleeve casting and its plastic deformation. Plastic deformation is made within the range of recrystallisation temperature of matrix alloy phase, but not exceeding the temperature of melting of disperse phases at average speed of deformation 10-2≤ε≤10 s-1. Deformation is made in several transitions with changing of direction by transitions to opposite one. Deformation is done by tool, the material, thermal processing and roughness of which corresponds to the material of shaft neck joined with the bearing.
EFFECT: increase of product wear-resistance due to creation of small grain structure of top layer, provision of positive gradient of mechanical properties by depth, reduction of surface roughness due to smoothing microroughnesses by breaking-in roller and reduction of material wearing-in period.
3 cl, 1 tbl, 1 ex
SUBSTANCE: invention relates to use of a composition for making at least one component of a car adjusting device. The composition contains partially crystalline, partially aromatic polyamide and is modified by at least one elastomer with weight ratio from 1% to 10% of the composition. The composition is used to make an adjusting device for changing the position of the controlled car component, having at least one gear wheel of a drive mechanism, one guide element and/or one sliding element.
EFFECT: invention enables to use the composition to make at least one component of an adjusting device and an adjusting device without considerable expenses with mechanical properties sufficient for operation.
14 cl, 7 dwg, 2 tbl, 2 ex
FIELD: machine building.
SUBSTANCE: sliding element with a pre-shaped substrate and galvanically applied anti-friction layer, formed of an alloy of tin, antimony and copper, whose content is in wt %: 5-20% antimony, copper 0.5-20% and the rest is tin, and lead content <0.7%, and the full content of other components is <0.5%, and in the layer of sliding bearing the tin crystals are of predominantly globular shape. Method of receiving a sliding element is that the electrolytic deposition of antifriction layer of an alloy with the components of tin, antimony and copper is carried out, and an electrolyte as a wetting agent preferably contains C13C15-oxo-alcohol, C16C18-fatty alcohol C18-oxo-alcohol with degree of ethoxylation from 10 to 30. The composition and deposition rate are adjusted by addition of auxiliary substances with large molecules, resulting in increased anti-friction layer and emerging of crystals of tin of a globular shape.
EFFECT: creation of the layer for a sliding bearing with improved operating characteristics.
10 cl, 1 ex
SUBSTANCE: method for producing aluminium-lead friction bearings is that preliminary the workpieces are produced out of porous aluminium with open porosity by the known technologies of casting into reusable moulds. Then the pores are filled with molten lead while a workpiece is located in the same mould. The result is a product with uniform content of lead along the cross-section of the product and the size of lead inclusions is equal to the size of pores in the porous aluminium.
EFFECT: improved quality of aluminium-lead bearings and reduced complexity of their production.
SUBSTANCE: thin-layer ceramic coating with the friction surface, formed with the ability to absorb grease with fibrous crystals alpha-Al2O3, characterised by the ability to layering with formation of longitudinal cracks with transverse size of ~ 1 nm and more due to longitudinal defects in the crystal lattice. A method of producing coating with the friction surface involves microarc oxidation of a part in the anode-cathode mode at a ratio of values of Ic/Ia = 1.0 - 1.15 for 90 -240 minutes consecutively in two electrolytes, and microarc oxidation in the second electrolyte is carried out with periodic pulsations of the anodic and cathodic current by 30% - 50% of the DC current mode for formation of longitudinal crystal lattice defects of fibrous crystals alpha-Al2O3.
EFFECT: increased bearing capacity of the thin-layer ceramic coating and the friction surface made on its base, by increasing damping of the mechanical effects on the surface in the pairs of friction formed on its basis.
FIELD: process engineering.
SUBSTANCE: invention relates to powder metallurgy, particularly, to materials intended for production of antifriction sheet materials on metal substrate. It may be used for producing antifriction bearings operated both lubed and dry, at higher sliding speeds, loads and temperatures. Porous cermet layer is produced on substrate from iron-nickel alloy by sintering a mix of fine disperse powders of copper and alloy to said substrate by pressing there said mix against said substrate by stainless steel gauze at 810-820°C. After sintering, said gauze is removed to produce sintered porous layer of reticular structure. Content of said powders in said mix makes in wt %: copper - 84-86, tin - 14-16.
EFFECT: higher wear resistance and stable friction factor (0,1-0,12).
2 dwg, 1 ex
SUBSTANCE: invention refers to powder metallurgy, particularly to anti-friction materials for high-loaded friction units. The invention can be implemented, for example for fabrication of anti-friction bushings. Anti-friction powder material on base of copper is produced out of charge containing, wt %: tin powder 0.5-10; led powder 0.5-1.0, graphite 0.3-0.5; copper powder - the rest. Charge is pressed and sintered at successive increase of temperature from 20 to 600°C and conditioning during 1.5 hours. Further temperature is raised to 660 ± 5°C, charge is conditioned during 1.5 hours and cooled in air by means of blow-off in a flow of dissociated ammonia. Charge is then calibrated at specific pressure equal to compacting pressure and is repeatedly sintered with successive increment of temperature form 20 to 860 ± 5 °C, holding during 1.5 hours and cooling in air.
EFFECT: produced material possesses high anti-friction property and high wear resistance.
FIELD: machine building.
SUBSTANCE: friction bearing consists of first element of bearing made out of austenite steel and second element of bearing made out of martensite steel possessing higher hardness. Also the first element corresponds to a padding, surface of which has higher hardness due to treatment by cold deformation of hardening. Additionally the first element is formed with cylinder rims (107, 108) connecting sole of shaft (114) with platform (113), while the second element is formed with bushings (104, 105) positioned in bored orifice of the case (103).
EFFECT: reduced wear occurring between two parts and essentially increased service life of parts.
9 cl, 6 dwg
SUBSTANCE: invention refers to powder metallurgy and can be applied in manufacturing of wear-resistant engineering devices and elements, such as slide bearings operating in extreme and dry friction conditions. Antifriction material is based on iron, graphite, calcium fluoride, phosphor, manganese sulphide, zinc and copper at the following component ratio, wt %: graphite 0.5-3, calcium fluoride 0.1-1, phosphor 0.05-1, manganese sulphide 0.1-1, zinc 0.05-1, copper 10-30, the rest is iron.
EFFECT: obtainment of high-temperature dispersed compact iron-based powder materials of enhanced hardness and corrosion resistance.
SUBSTANCE: invention can be used at manufacturing of antifriction bushings. It is prepared charge containing, wt %: tin powder 9.5-10; leady powder 0.5-1.0; graphite 0.3-0.5; powder copper electrolytic - the rest. Charge is pressed and sintered by means of sequential increasing of temperature up to 600°±5C with isolation during 1.5 hours, following increasing of temperature up to 660°C±5°C with isolation during 1.5 hours and cooling on air, by means of blow-off in flow of dissociated ammonia. After sintering it is implemented calibration at specific pressure, equal to compacting pressure, with following iterative sintering by means of following increasing of temperature up to 860°C±5°C with isolation during 1.5 hours and following cooling on air.
EFFECT: increasing of antifriction properties, increasing of wear resistance.
2 cl, 1 dwg
SUBSTANCE: invention relates to compositions of hydraulic fluids used in automatic transmission. Improvements are achieved by adding isomerised slack wax (fraction 360°C - K.K) to an oil base which is a low-viscosity distillate component. The low-viscosity distillate component is obtained from vacuum distillate of a crude oil distillation plant (fraction 300-450°C) through selective purification, dewaxing and hydrofining. The isomerised slack wax (fraction 360°C - K.K) is obtained by a catalytic method from petroleum slack wax - a by-product of plants for dewaxing refined oil (fraction 300°C - K.K) with oil content of 2.5-12 wt % by hydrofining, hydroisodewaxing, hydrogenation with subsequent fractionation. The isomerised slack wax has kinematic viscosity at 100°C in the range of 3.9-4.7 mm2/s, chilling point not higher than minus 10°C and open flash point not lower than 210°C. Components of the hydraulic fluid for automatic transmission are in the following ratio, wt %: multifunctional additive (antiwear, antioxidant, friction modifier, viscosity modifier) 14-18; anticorrosion additive 0.06-0.1; antifoam agent 0.002-0.006, dye 0.002-0.003, base - up to 100, wherein the base contains, wt %: a low-viscosity distillate component - 20-70; isomerised slack wax - 30-80.
EFFECT: improved viscosity-temperature characteristics: low dynamic viscosity at minus 40°C, higher viscosity index, low chilling point, reduced susceptibility to foaming.
1 cl, 4 tbl, 1 ex
SUBSTANCE: invention relates to grease for high-speed radial-axial bearings of gyroscopes and synchronous gyromotors, which contains a dispersion medium, a dispersion phase and functional additives, wherein the dispersion medium contains a mixture of low-viscous polyalphaolefin hydrocarbons PAOM-4, dioctyl sebacate and is a product of reaction of octadecylamine, polyisocyanate and aniline, and the functional additive contains an antioxidant additive - phenyl-alpha-naphthylamine and an antiwear additive - tricresyl phosphate.
EFFECT: obtaining a lubricant with a high operating temperature range.
1 cl, 2 tbl
SUBSTANCE: flame spraying of epoxy powder composition is carried out. Prior to flame spraying, first 0.01-3.0 mm-thick layer of coating is applied on metal surface by electric spark method, coating hardness exceeding that of metal to be protected, using the electrode of compacted mix of metal powder A and heat-resistant mineral powder B at the ratio of A:B=99:1-80:20. Thereafter said layer is treated by phosphating composition. Second layer is applied by powder flame spraying. Said powder consists of solid epoxy resin modified by fluorine rubber at stretch equipment with resin-rubber ratio of 97:3-70:30, imidazole hardener and filler composed of metal powder mix and antifriction mineral with high surface hardness. Powder is applied in layer of thickness varying from 0.5 to 3 mm and comprises the following components, in wt %: aforesaid solid epoxy resin modified by fluorine rubber - 100, imidazole hardener - 2-10, metal powder - 90-150, antifriction mineral - 0.4-12.
EFFECT: higher strength and adhesion.
1 cl, 2 tbl, 6 ex
SUBSTANCE: method involves: (a) feeding starting components into a first feed zone; (b) carrying out a first reaction in a first reaction zone; (c) carrying out first blowing in a first blowing zone; and (d) cooling in a cooling zone to obtain a soap concentrate. Said zones have an auger element for transportation and carrying out reaction and are arranged in the order (a), (b), (c), (d). The invention also relates to a method of producing a lubricating composition using the described method.
EFFECT: use of the present invention improves the process, stability thereof, as well as quality control and cost effectivess.
9 cl, 4 ex, 36 tbl, 6 dwg
SUBSTANCE: additive batch contains alkaline calcium alkylsalicylate, a solution in oil of a carbonated product of reaction of alkylbenzene sulphonic acid with calcium hydroxide, having base number less than 390 mg KOH/g, ash-free nitrogen-containing dispersant, a block copolymer of ethylene and propylene oxides based on ethylene diamine, modified dialkyl dithiophosphate, phenyl-α-naphthylamine, octylated diphenylamine - the balance. The modified dialkyl dithiophosphate is a 50% solution of a mixture of an amine salt and an amide of dialkyl dithiophosphoric acid in oil with tetra(2-ethylhexyl)thiuram disulphide, taken in weight ratio to the 50% solution ranging from 1:3 to 3:1 with atomic ratio of sulphur to phosphorus in the range of 3.25-11.5. The engine oil contains a mineral base, a batch of additives, an anti-foam additive and a polymethacrylate depressant with molecular weight from 2800 to 3200.
EFFECT: improved antioxidation, anticorrosion and deactivation properties while maintaining the level of antiwear and antifriction properties with reduction of sulphated ash and content of sulphur, phosphorus, which increases the oil-change period in an engine and time between repairs.
3 cl, 13 tbl
SUBSTANCE: lubricant is a mixture of fine-powder components with mean particle size of not more than 150 mcm. The lubricant contains: (a) a secondary and/or tertiary calcium phosphate compound, (b) a fatty acid or salt thereof, (c) boric acid, a boric acid salt (borate) and/or a mineral containing a boric acid salt and (d) condensed alkali metal phosphates, and does not contain any graphite additives.
EFFECT: maintaining looseness and fluidity without lumping during storage, decomposition of cinder formed on a hot metal surface while avoiding use of graphite in the lubricant.
12 cl, 1 tbl
SUBSTANCE: oil contains the following in wt %: calcium alkylsalicylate 5.4-6.0, alkaline calcium alkylphenolate 1.0-1.5 or highly alkaline calcium alkylphenolate 0.7-0.8, a colloidal dispersion of calcium carbonate stabilised with calcium sulphonate 1.0-1.5, boron-containing succinimide 2.5-3.5, sulphur-containing alkylphenol 0.4-0.6, zinc dialkyldithiophosphate 0.9-1.5, polymethacrylate 0.9-1.2, polymethylsiloxane 0.003-0.005, zinc dialkylphenyl dithiophosphate 1.4-2.0, an oil viscosity modifier selected from copolymers of ethylene and propylene or hydrogenated copolymers of styrene and butadiene or hydrogenated copolymers of isoprene 0.6-2.0, an ester selected from diisooctylsebacate or diisooctyldipate or triphetanoate trimethylolpropane 14-18, polyalphaolefin oil 54.0-59.5, mineral oil - up to 100.
EFFECT: improved antifriction and antioxidation properties of the oil for everyday use in high-load vehicle diesel engines.
SUBSTANCE: lubricating composition contains base oil associated with group III and/or group II of base oil API categories, 0.5-5 wt % phenol antioxidant and 0.5-5 wt % amine-based antioxidant and total content of antioxidants is at least 2 wt %.
EFFECT: improved method.
5 cl, 4 tbl, 6 ex
SUBSTANCE: lubricating composition for aviation synthetic hydraulic oil for hydraulic systems of aviation, rocket and ground equipment contains a base in form of polyalpha-olefin hydrocarbons combined with a rheological concentrator based on low-viscosity monoethers C18H38O2, stabilised with polymethacrylate (NYCOPERF RA 655), a phenol anti-oxidation additive, triisopropyl phosphate as an anti-wear additive, a corrosion inhibitor 1,2,3-benzotriazole and a tolyltriazole derivative Irgamet 39, an organosilicon liquid as an anti-foaming agent and a dye.
EFFECT: production of aviation hydraulic oil with improved operational characteristics and high explosion- and fire-safety.
1 cl, 4 tbl
SUBSTANCE: lubricating composition for universal synthetic oil, capable of operating in gas-turbine engines and turbine-propeller engines contains a base in form of aviation pentaerythritol ether based on a mixture of full esters of pentaerythritol and fatty carboxylic acids and ether of pentaerythritol dimer, an alkylphenylamine anti-oxidation additive of the Irganox type - bis(4-(1,1,3,3-tetramethylbutyl)phenyl)amine or dioctyl diphenylamine, a high-molecular weight alkylphenol anti-oxidation additive of the Irganox L101 type, an anti-wear additive based on a mixture of tricresyl phosphate and dithiophosphate Irgalube 353 in ratio 3:1, a corrosion inhibitor - mixture of 1,2,3-benzotriazole and a tolyltriazole derivative Irgamet 39 in ratio 1:10.
EFFECT: high thermal stability, high thermo-oxidative stability and improved anti-corrosion properties under high temperature conditions.
1 cl, 3 tbl
SUBSTANCE: lubricating composition, especially appropriate for two-stroke engines, contains 90-20% of base lubricating oil, 10-80% (on sum of two components) of fatty acid C1-C4-alkyl ester, and 0.1-20% (on sum of all components) of lubricating oil additive. Invention also discloses a method of supplying lubricating composition separately from fuel and a method, wherein fuel composition for two-stroke engine includes indicated lubricating composition for common supply.
EFFECT: improved environmental condition.
19 cl, 4 tbl, 4 ex