CN108659913B - Filling and curing type high-temperature-resistant solid lubrication bearing and preparation method thereof - Google Patents
Filling and curing type high-temperature-resistant solid lubrication bearing and preparation method thereof Download PDFInfo
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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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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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
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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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
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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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
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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
- C10M2201/085—Phosphorus oxides, acids or salts
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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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Abstract
The invention discloses a filling and curing type high-temperature resistant solid lubrication bearing and a preparation method thereof. Mixing phosphoric acid and aluminum hydroxide at room temperature, adding copper oxide and tributyl phosphate after the mixture is uniform, uniformly stirring the mixture to prepare a high-temperature binder, adding superfine graphite powder, nano tungsten disulfide powder, nano aluminum oxide powder and graphene according to a proportion, fully stirring the mixture, preparing a viscous paste after the mixture is uniform, pressing the paste into a hole or a groove of a solid lubrication bearing, carrying out heating and curing treatment in a vacuum drying oven, and then cooling the paste to the room temperature along with a furnace. The solid lubricating material is firmly bonded with the bearing matrix, has good compactness and uniform and non-broken surface, and can be still stable in the metal matrix of the solid lubricating bearing for a long time without melting at the high temperature of 600 ℃.
Description
Technical Field
The invention relates to a filling and curing type high-temperature-resistant solid lubricating bearing which is mainly used in the industries of ferrous metallurgy, transportation, coal, water conservancy and the like and is suitable for the field of oil-free lubricating sliding bearings, and particularly relates to a filling and curing type high-temperature-resistant solid lubricating bearing and a preparation method thereof.
Background
The traditional lubricating materials are mainly lubricating materials such as lubricating oil, lubricating grease and the like, which are widely applied in the fields of automobiles, mechanical engineering and the like, but the problems of pollution, leakage and the like exist in the using process, and the using conditions are gradually strictly limited. In harsh working environments (such as high temperature, high load, ultralow temperature, ultrahigh vacuum, strong redox, strong radiation and other environmental conditions), lubricating oil and lubricating grease gradually lose effectiveness and cannot be used continuously. The solid lubrication bearing is mainly structurally characterized in that a metal base material is combined with a solid lubricant, and the structural characteristics of the solid lubrication bearing determine that the solid lubrication bearing can realize self-lubrication under the conditions of heavy load, shaking and swinging of a kinematic pair in severe or special environments such as high temperature, low temperature, pollution, corrosion and the like. In comparison, the solid lubricating material avoids the defects of the traditional liquid lubricating material, and the nano solid lubricating material has more excellent friction lubricating property. The nanometer material is used as a lubricant, so that not only can a layer of solid film be formed on the contact surface, the friction coefficient is reduced, but also the damaged friction surface can be repaired and the solid film can permeate into the surface layer to play a role in strengthening, and the bearing capacity and the wear resistance are improved.
Solid lubricated bearings are largely classified into two major categories, metal-based and polymer-based. The mosaic type solid lubrication bearing is the most commonly used metal-based solid lubrication bearing, and the solid lubrication material continuously seeps and transfers due to the thermal action and friction when the bearing moves, so that the lubrication and antifriction effects are achieved, and meanwhile, the matrix is worn. The embedded solid lubrication bearing has high bearing capacity, low friction and abrasion, long service life, high reliability and is suitable for being used in low-speed, heavy-load and special environments. The copper alloy material has good wear resistance, excellent tribological performance, low cost, easy processing and wide application. The traditional method for preparing the embedded solid lubrication bearing is to pre-design and process holes or grooves with a certain area proportion on a metal substrate, embed a solid lubrication material with a certain component in the holes or the grooves, and combine the holes or the grooves and the solid lubrication material into a whole to be used as a bearing, a bearing bush or a lining plate. Before being embedded, the solid lubricating material is prepared into a column shape through the processes of mixing, drying, press forming, sintering, turning and the like. During inlaying, the solid lubricating column is pressed into the bearing matrix by operators, inlaying quality is difficult to guarantee, solid lubricating materials are difficult to embed or easy to fall off, even the surface or the whole of the solid lubricating materials are cracked, the operation process is time-consuming and labor-consuming, and the manufacturing cost is high.
The solid lubricating material powder and the binder are fully mixed to form paste by adopting a filling and curing mode, the paste is filled into a hole or a groove of a solid lubricating bearing matrix, and the solid lubricating material and the bearing matrix are combined into a whole through curing treatment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an improved filling and curing type high-temperature-resistant solid lubrication bearing and a preparation method thereof, so that the solid lubrication bearing which is suitable for being used in the environments of high temperature, large load, high dust, oil-free lubrication and the like and has outstanding temperature resistance is formed.
A filling and curing type high-temperature-resistant solid lubrication bearing adopts the following technical scheme: filling the high temperature resistant solid lubrication bearing of solidification formula, wherein: pre-processing holes or grooves which account for 20-40% of the surface area of a copper alloy substrate, filling a mixture of a high-temperature binder and a solid lubricating material in the holes or grooves, and performing heating curing treatment to combine the holes or grooves into a whole to be used as a solid lubricating bearing; the mixture is prepared from the following components in parts by weight: 35-45% of high-temperature binder and 55-65% of solid lubricating material; the high-temperature binder is prepared from the following components in parts by weight: 80-90% of phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, 5-10% of copper oxide and 5-10% of tributyl phosphate; the solid lubricating material consists of 50-75% of superfine graphite powder, 10-20% of nano tungsten disulfide powder, 10-20% of nano aluminum oxide and 5-10% of graphene.
The tensile strength of the copper alloy matrix is more than 750N/mm2The Brinell hardness is higher than 230 HB.
A preparation method of a filling and curing type high-temperature-resistant solid lubrication bearing comprises the following steps:
a. processing a bearing matrix: roughly machining the inner and outer circular surfaces of the copper alloy solid lubricating shaft sleeve on a lathe, and machining a hole or a groove on a drilling machine or a milling machine;
b. preparing a high-temperature binder: mixing phosphoric acid, aluminum hydroxide, copper oxide and tributyl phosphate in proportion at room temperature, and uniformly stirring;
c. mixing solid lubricating materials: weighing and mixing the superfine graphite powder, the nano tungsten disulfide powder, the nano aluminum oxide and the graphene in proportion at room temperature;
d. preparing paste: adding the solid lubricating material into the high-temperature binder, and fully stirring to form a viscous paste after uniform stirring;
e. filling paste: pressing the prepared paste into a hole or a groove on a solid lubrication bearing substrate, and extruding and compacting;
f. curing treatment: putting the solid lubrication bearing into a vacuum drying oven for vacuum solidification treatment, wherein the heating rate is 50-100 ℃/h, when the temperature is heated to 115-125 ℃, the temperature is kept for 2-2.5 h, and then the solid lubrication bearing is cooled to room temperature along with a furnace;
g. surface finishing: and (3) performing finish machining on the inner and outer circular surfaces of the solid lubrication bearing on a numerical control lathe, wherein the surface roughness value reaches Ra0.8-Ra1.6.
Further mixing 80% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 10 percent of copper oxide and 10 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; mixing 75% of superfine graphite powder, 10% of nano tungsten disulfide powder, 10% of nano aluminum oxide and 5% of graphene to form a solid lubricating material; mixing 35% of high-temperature binder and 65% of solid lubricating material, uniformly stirring to form viscous paste, pressing into a hole or a groove on a solid lubricating bearing matrix, and extruding to compact; putting the solid lubrication bearing into a vacuum drying oven for vacuum solidification treatment, wherein the heating rate is 100 ℃/h, when the temperature is heated to 120 ℃, the temperature is kept for 2h, and then the solid lubrication bearing is cooled to the room temperature along with a furnace; and performing finish machining on the inner and outer circular surfaces of the solid lubrication bearing on a numerical control lathe.
Further mixing 85% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 7.5 percent of copper oxide and 7.5 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; 62.5 percent of superfine graphite powder, 15 percent of nano tungsten disulfide powder, 15 percent of nano aluminum oxide and 7.5 percent of graphene are mixed to form a solid lubricating material; after being mixed, 40% of high-temperature binder and 60% of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
Further mixing 90% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 5 percent of copper oxide and 5 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; mixing 50% of superfine graphite powder, 20% of nano tungsten disulfide powder, 20% of nano aluminum oxide and 10% of graphene to form a solid lubricating material; after being mixed, 45 percent of high-temperature binder and 55 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
Advantageous effects
Compared with the prior art, the filling and curing type high-temperature resistant solid lubricating bearing provided by the invention has the advantages that holes or grooves are processed in advance on a copper alloy matrix, a solid lubricating material and a high-temperature resistant binder are uniformly mixed and filled in the holes or grooves, and the holes or grooves are combined into a whole through curing treatment to serve as the solid lubricating bearing, so that the manufacturing process is simple and convenient, the realization is easy, raw materials can be greatly saved, and the cost is saved by more than 30%. The solid lubricating bearing prepared by the invention has the advantages that the solid lubricating material and the copper alloy matrix have large binding power, the material structure is uniform, the compactness is good, the solid lubricating material is not easy to fall off and break, the wear resistance and the self-lubricating performance are excellent, the tribological performance is good at high temperature, the bearing can continuously and stably run at the working temperature of about 500 ℃, and the friction coefficient is between 0.15 and 0.35; even at the high temperature of 600 ℃, the performance is stable, the solid lubricating material does not melt or fall off, and the lubricating effect is still achieved.
Detailed Description
The invention is described in detail below with reference to examples:
the phosphate binder is synthesized by phosphoric acid liquid and aluminum hydroxide powder, can resist high temperature of over 800 ℃, and has the characteristics of high-temperature bonding strength, small curing shrinkage, good water resistance, shock resistance, peeling resistance and the like. The addition of a proper amount of copper oxide in the phosphate adhesive can further improve the bonding strength and the service life of the adhesive. Tributyl phosphate is often used as a plasticizer and a defoaming agent, and is effective in rapidly defoaming the formed foamed film in an unstable state. The plasticity and uniformity of the composite material can be properly improved by adding tributyl phosphate into the phosphate binder.
The graphite powder has excellent lubricating property, good chemical stability at normal temperature, acid resistance, alkali resistance and organic solvent corrosion resistance. Graphite is often used as a lubricant in the mechanical industry, and the graphite wear-resistant material can work at a high sliding speed at a temperature of 200-2000 ℃ without using lubricating oil. Compared with the common graphite powder, the superfine graphite powder material has the characteristics of high chemical activity, good heat conduction and adhesiveness and the like due to the volume effect and the surface effect, and has special oxidation resistance, self-lubricating property and plasticity under the high-temperature condition, and can be used as a high-temperature-resistant lubricant base material and a corrosion-resistant lubricant base material.
The nano tungsten disulfide is a solid lubricating material with excellent performance, has strong adsorption capacity, high heat resistance and oxidation resistance and good lubricating effect, and is suitable for lubrication under various harsh conditions such as high temperature, high load, high pressure, high rotating speed and the like. The addition of tungsten disulfide in the solid lubricating material can effectively improve the tribological property and oxidation resistance of the composite material.
The nano alumina has high temperature resistance and porosity; high hardness and good dimensional stability, can be widely applied to reinforcement and toughening of products such as plastics, rubber, ceramics, refractory materials and the like, and particularly has remarkable improvement on compactness, smoothness, cold and hot fatigue property, fracture toughness, creep resistance and wear resistance of the materials.
Graphene is the thinnest and highest-strength material in the natural world at present, and the strength of the graphene is 100 times higher than that of the best steel in the world. Graphene has a very high heat conductivity coefficient, the heat conductivity is superior to that of carbon nanotubes, various atoms and molecules can be adsorbed and desorbed, after graphene is added, the metal contact surface adsorbs the last layer of graphene, the friction coefficient and the wear rate of the last layer of graphene are greatly reduced, the surface hardness of metal can be greatly increased, and along with relative motion between contact surfaces, graphene can be uniformly and firmly attached to the contact surface, the lubricating effect is better, in addition, wear grooves and scratches can also be repaired to a certain extent, one layer of graphene protective film is formed, and direct friction between metals is isolated.
The preparation parameters in the concrete implementation are as follows:
phosphoric acid, analytically pure, relative molecular mass 98.00, H3PO4The content is not less than 85.0%.
Aluminum hydroxide, analytically pure, molecular weight 78.00.
Copper oxide, analytically pure, with CuO content not less than 99.0%.
Tributyl phosphate, analytically pure, C12H27O4The content of P is not less than 98.5%.
The superfine graphite powder has the fixed carbon content of more than or equal to 98 percent and the particle size of 2000-10000 meshes.
The content of the tungsten disulfide is greater than or equal to 98%, and the granularity of the tungsten disulfide is 30-1000 nm.
The nano alumina powder has the alumina content of more than or equal to 99 percent and the granularity of 30-1000 nm.
The graphene is of a single-layer, few-layer or multi-layer structure, the purity of the graphene is greater than or equal to 95%, the thickness of the graphene is 0.5-8 nm, the number of layers is 1-10, and the diameter of each layer is 0.5-50 mu m.
Filling and solidifying type high-temperature resistant solid lubrication bearing, namely, pre-processing holes or grooves which account for 20-40% of the surface area of a matrix on a copper alloy matrix, filling a mixture of a high-temperature binder and a solid lubrication material in the holes or grooves, and combining the holes or grooves into a whole to be used as the solid lubrication bearing through heating and solidifying treatment; the mixture is prepared from the following components in parts by weight: 35-45% of high-temperature binder and 55-65% of solid lubricating material; the high-temperature binder is prepared from the following components in parts by weight: 80-90% of phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, 5-10% of copper oxide and 5-10% of tributyl phosphate; the solid lubricating material consists of 50-75% of superfine graphite powder, 10-20% of nano tungsten disulfide powder, 10-20% of nano aluminum oxide and 5-10% of graphene. The tensile strength of the copper alloy matrix is higher than 750N/mm2The Brinell hardness is higher than 230 HB.
The first embodiment is as follows:
example 1 was carried out: preparation formula I of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for a filling and curing type high-temperature resistant solid lubrication bearing according to weight percentage, mixing 80% of mixed solution of phosphoric acid (analytically pure, Yongda chemical reagent limited company in Tianjin) and aluminum hydroxide (analytically pure, Guangdong fine chemical research institute in Tianjin) (mass ratio 3.5: 1), 10% of copper oxide (analytically pure, Guangdong scientific and technological development limited company in Tianjin) and 10% of tributyl phosphate (analytically pure, Guangdong fine chemical research institute in Tianjin) according to proportion, and uniformly stirring to prepare the high-temperature binder;
(2) the materials used in the formulation of the solid lubricating material for filling the solidified high-temperature resistant solid lubricating bearing are respectively weighed according to the weight percentage, 75 percent of superfine graphite powder (Vast Huffi graphite Limited company in Dongguan city, particle size 2000 mesh) and 10 percent of nano tungsten disulfide powder (WS Taiping lubricating material Limited company in Alshan, particle size 300 nm2The content is more than or equal to 98 percent), 10 percent of nano alumina (Xinding wear-resistant metal material Co., Ltd., granularity of 50 nm) and 5 percent of graphene (Suzhou constant ball graphene Co., Ltd., multilayer structure, thickness of 3.4-8 nm, layer number of 6-10 and sheet layer diameter of 5-50 mu m) are mixed to form a solid lubricating material;
(3) mixing 35% of high-temperature binder and 65% of solid lubricating material, stirring uniformly to form viscous paste, pressing into holes or grooves on the solid lubricating bearing matrix, extruding tightly, wherein the hardness of the copper alloy bearing matrix is 230HB, and the tensile strength is 750N/mm2；
(4) Putting the solid lubrication bearing into a vacuum drying oven for vacuum solidification treatment, wherein the heating rate is 100 ℃/h, when the temperature is heated to 120 ℃, the temperature is kept for 2h, and then the solid lubrication bearing is cooled to the room temperature along with a furnace;
(5) and (3) performing finish machining on the inner and outer circular surfaces of the solid lubrication bearing on a numerical control lathe, wherein the roughness value of the inner and outer circular surfaces of the copper alloy solid lubrication bearing reaches Ra1.6.
Example two:
example 2 was carried out: preparation formula II of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 80% of mixed solution of phosphoric acid and aluminum hydroxide (the mass ratio is 3.5: 1), 10% of copper oxide and 10% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a solid lubricating material formula of a filling and curing type high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 75% of superfine graphite powder, 10% of nano tungsten disulfide powder, 10% of nano aluminum oxide and 5% of graphene to form a solid lubricating material;
(3) after being mixed, 40% of high-temperature binder and 60% of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example three:
example 3 of implementation: preparation formula III of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 80% of mixed solution of phosphoric acid and aluminum hydroxide (the mass ratio is 3.5: 1), 10% of copper oxide and 10% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a solid lubricating material formula of a filling and curing type high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 75% of superfine graphite powder, 10% of nano tungsten disulfide powder, 10% of nano aluminum oxide and 5% of graphene to form a solid lubricating material;
(3) after being mixed, 45 percent of high-temperature binder and 55 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example four:
example 4 of implementation: preparation formula IV of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 85% of mixed solution of phosphoric acid and aluminum hydroxide (the mass ratio is 3.5: 1), 7.5% of copper oxide and 7.5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a solid lubricating material formula of a filling and curing type high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 62.5% of superfine graphite powder, 15% of nano tungsten disulfide powder, 15% of nano aluminum oxide and 7.5% of graphene to form a solid lubricating material;
(3) after being mixed, 35 percent of high-temperature binder and 65 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on the solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example five:
example 5 was carried out: preparation formula five of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 85% of mixed solution of phosphoric acid and aluminum hydroxide (the mass ratio is 3.5: 1), 7.5% of copper oxide and 7.5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a solid lubricating material formula of a filling and curing type high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 62.5% of superfine graphite powder, 15% of nano tungsten disulfide powder, 15% of nano aluminum oxide and 7.5% of graphene to form a solid lubricating material;
(3) after being mixed, 40% of high-temperature binder and 60% of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example six:
example 6 of implementation: preparation formula six of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 85% of mixed solution of phosphoric acid and aluminum hydroxide (the mass ratio is 3.5: 1), 7.5% of copper oxide and 7.5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a solid lubricating material formula of a filling and curing type high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 62.5% of superfine graphite powder, 15% of nano tungsten disulfide powder, 15% of nano aluminum oxide and 7.5% of graphene to form a solid lubricating material;
(3) after being mixed, 45 percent of high-temperature binder and 55 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded. The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example seven:
example 7 was carried out: preparation formula seven of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 90% of mixed solution of phosphoric acid and aluminum hydroxide (mass ratio is 3.5: 1), 5% of copper oxide and 5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a formula of a solid lubricating material for filling a solidified high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 50% of superfine graphite powder, 20% of nano tungsten disulfide powder, 20% of nano aluminum oxide and 10% of graphene to form the solid lubricating material;
(3) after being mixed, 35 percent of high-temperature binder and 65 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on the solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example eight:
example 8 was carried out: preparation formula eight of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 90% of mixed solution of phosphoric acid and aluminum hydroxide (mass ratio is 3.5: 1), 5% of copper oxide and 5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a formula of a solid lubricating material for filling a solidified high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 50% of superfine graphite powder, 20% of nano tungsten disulfide powder, 20% of nano aluminum oxide and 10% of graphene to form the solid lubricating material;
(3) after being mixed, 40% of high-temperature binder and 60% of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
Example nine:
example 9 was carried out: preparation formula nine of filling and curing type high-temperature-resistant solid lubrication bearing
(1) Respectively weighing materials used in a formula of a high-temperature binder for filling and curing type high-temperature resistant solid lubrication bearings according to weight percentage, mixing 90% of mixed solution of phosphoric acid and aluminum hydroxide (mass ratio is 3.5: 1), 5% of copper oxide and 5% of tributyl phosphate according to a proportion, and preparing the high-temperature binder after uniformly stirring;
(2) respectively weighing materials used in a formula of a solid lubricating material for filling a solidified high-temperature-resistant solid lubricating bearing according to weight percentage, and mixing 50% of superfine graphite powder, 20% of nano tungsten disulfide powder, 20% of nano aluminum oxide and 10% of graphene to form the solid lubricating material;
(3) after being mixed, 45 percent of high-temperature binder and 55 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded. The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
The preparation method of the solid lubrication bearing is the same as that described in the first embodiment.
The sample of the invention was subjected to wear testing on a solid lubricated bearing test bed. The test conditions are that the pressure is 1Mpa, the rotating speed is 200r/min, the time is 2h, the test temperature is 500 ℃, and the weight loss of the solid lubrication bearing sample before and after friction is taken as the abrasion loss.
And (3) putting the solid lubricating bearing sample into a muffle furnace, preserving the heat for 3 hours at the temperature of 600 ℃, judging the high-temperature resistance of the solid lubricating material, and testing results are shown in table 1.
TABLE 1 solid lubrication bearing Performance test results
| Examples | Coefficient of friction | Abrasion loss per gram | Whether the solid lubricating material is melted or fallen off at 600 DEG C |
| Example 1 | 0.18 | 0.37 | Whether or not |
| Example 2 | 0.21 | 0.43 | Whether or not |
| Example 3 | 0.23 | 0.47 | Whether or not |
| Example 4 | 0.22 | 0.45 | Whether or not |
| Example 5 | 0.25 | 0.51 | Whether or not |
| Example 6 | 0.28 | 0.57 | Whether or not |
| Example 7 | 0.27 | 0.55 | Whether or not |
| Example 8 | 0.31 | 0.63 | Whether or not |
| Example 9 | 0.35 | 0.71 | Whether or not |
As can be seen from Table 1, the filling-solidifying type high-temperature-resistant solid lubrication bearing has the advantages of small friction coefficient, good wear resistance and the like, the solid lubrication material is not melted or shed at the high temperature of 600 ℃, and the solid lubrication bearing can be used for a long time in the environment below 500 ℃.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (5)
1. Pack solidification formula high temperature resistant solid lubrication bearing, its characterized in that: pre-processing holes or grooves which account for 20-40% of the surface area of a copper alloy substrate, filling a mixture of a high-temperature binder and a solid lubricating material in the holes or grooves, and performing heating curing treatment to combine the holes or grooves into a whole to be used as a solid lubricating bearing; the mixture is prepared from the following components in parts by weight: 35-45% of high-temperature binder and 55-65% of solid lubricating material; the high-temperature binder is prepared from the following components in parts by weight: 80-90% of phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, 5-10% of copper oxide and 5-10% of tributyl phosphate; the solid lubricating material consists of 50-75% of superfine graphite powder, 10-20% of nano tungsten disulfide powder, 10-20% of nano aluminum oxide and 5-10% of graphene, and the tensile strength of a copper alloy matrix is higher than 750N/mm2The Brinell hardness is higher than 230 HB.
2. The preparation method of the filling and curing type high-temperature-resistant solid lubricating bearing according to claim 1 comprises the following steps:
a. processing a bearing matrix: roughly machining the inner and outer circular surfaces of the copper alloy solid lubricating shaft sleeve on a lathe, and machining a hole or a groove on a drilling machine or a milling machine;
b. preparing a high-temperature binder: mixing phosphoric acid, aluminum hydroxide, copper oxide and tributyl phosphate in proportion at room temperature, and uniformly stirring;
c. mixing solid lubricating materials: weighing and mixing superfine graphite powder, nano tungsten disulfide powder, nano aluminum oxide and graphene in proportion at room temperature;
d. preparing paste: adding the solid lubricating material into the high-temperature binder, and fully stirring to form a viscous paste after uniform stirring;
e. filling paste: pressing the prepared paste into a hole or a groove on a solid lubrication bearing substrate, and extruding and compacting;
f. curing treatment: putting the solid lubrication bearing into a vacuum drying oven for vacuum solidification treatment, wherein the heating rate is 50-100 ℃/h, when the temperature is heated to 115-125 ℃, the temperature is kept for 2-2.5 h, and then the solid lubrication bearing is cooled to room temperature along with a furnace;
g. surface finishing: and (3) performing finish machining on the inner and outer circular surfaces of the solid lubrication bearing on a numerical control lathe, wherein the surface roughness value reaches Ra0.8-Ra1.6.
3. The method for preparing the filling-curing type high-temperature-resistant solid lubricating bearing according to claim 2, is characterized in that: mixing 80% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 10 percent of copper oxide and 10 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; mixing 75% of superfine graphite powder, 10% of nano tungsten disulfide powder, 10% of nano aluminum oxide and 5% of graphene to form a solid lubricating material; mixing 35% of high-temperature binder and 65% of solid lubricating material, uniformly stirring to form viscous paste, pressing into a hole or a groove on a solid lubricating bearing matrix, and extruding to compact; putting the solid lubrication bearing into a vacuum drying oven for vacuum solidification treatment, wherein the heating rate is 100 ℃/h, when the temperature is heated to 120 ℃, the temperature is kept for 2h, and then the solid lubrication bearing is cooled to the room temperature along with a furnace; and performing finish machining on the inner and outer circular surfaces of the solid lubrication bearing on a numerical control lathe.
4. The method for preparing the filling-curing type high-temperature-resistant solid lubricating bearing according to claim 2, is characterized in that: mixing 85% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 7.5 percent of copper oxide and 7.5 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; 62.5 percent of superfine graphite powder, 15 percent of nano tungsten disulfide powder, 15 percent of nano aluminum oxide and 7.5 percent of graphene are mixed to form a solid lubricating material; after being mixed, 40% of high-temperature binder and 60% of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
5. The method for preparing the filling-curing type high-temperature-resistant solid lubricating bearing according to claim 2, is characterized in that: mixing 90% phosphoric acid and aluminum hydroxide in a mass ratio of 3.5: 1, mixing the mixed solution, 5 percent of copper oxide and 5 percent of tributyl phosphate according to a proportion, and preparing a high-temperature binder after uniformly stirring; mixing 50% of superfine graphite powder, 20% of nano tungsten disulfide powder, 20% of nano aluminum oxide and 10% of graphene to form a solid lubricating material; after being mixed, 45 percent of high-temperature binder and 55 percent of solid lubricating material are uniformly stirred to form viscous paste, and the viscous paste is pressed into a hole or a groove on a solid lubricating bearing matrix and is tightly extruded.
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Application publication date: 20181016 Assignee: Tangshan Zhongmao Technology Co.,Ltd. Assignor: NORTH CHINA University OF SCIENCE AND TECHNOLOGY Contract record no.: X2021980010349 Denomination of invention: Filled solidified high temperature resistant solid lubricated bearing and its preparation method Granted publication date: 20210402 License type: Common License Record date: 20211008 |