CN115558370A - Antifriction and wear-resistant coating for sliding bearing, preparation method of antifriction and wear-resistant coating and preparation method of coating - Google Patents
Antifriction and wear-resistant coating for sliding bearing, preparation method of antifriction and wear-resistant coating and preparation method of coating Download PDFInfo
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Abstract
The invention discloses an antifriction wear-resistant coating for a sliding bearing, a preparation method thereof and a preparation method of the coating, belonging to the technical field of coatings. According to the preparation method of the antifriction and wear-resistant coating for the sliding bearing, the graphene prepared by the liquid phase stripping method and the micron-sized zirconium phosphate are used as additives, and are added into the antifriction and wear-resistant coating with polytetrafluoroethylene and molybdenum disulfide in a specific ratio, so that the antifriction and wear-resistant coating with better performance is prepared. The coating has the advantages of lower friction coefficient, higher wear resistance, more excellent fatigue resistance and better bonding strength with the sliding bearing.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an antifriction and wear-resistant coating for a sliding bearing, a preparation method of the antifriction and wear-resistant coating and a preparation method of a coating.
Background
The sliding bearing is widely applied to various mechanical transmission devices, such as diesel engines, steam turbines, heavy-duty gear boxes, metallurgical equipment, various pumps, various engineering machines and the like. The friction coefficient of the friction pair is reduced and the wear resistance is enhanced by spraying the antifriction wear-resistant coating on the surface of the sliding bearing, and the coating is one of the main ways for improving the performances of the sliding bearing and a transmission system.
With the requirement that mechanical transmission equipment is adapted to more extreme working conditions, the sliding bearing used by the mechanical transmission equipment needs to bear larger load, more severe impact, lower or higher rotating speed and other extreme working conditions, and the traditional antifriction wear-resistant spray coating cannot meet the challenges brought by the more extreme working conditions.
Therefore, it is necessary to develop a new antifriction and antiwear coating material, which is sprayed on the surface of the sliding bearing to further reduce the friction coefficient of the sliding bearing and enhance the wear resistance thereof. Meanwhile, compared with the traditional antifriction wear-resistant spray coating, the novel coating is required to have more excellent fatigue resistance and higher bonding strength.
Disclosure of Invention
The invention aims to: the invention aims to provide an antifriction and wear-resistant coating for a sliding bearing, which solves the requirement that the sliding bearing is suitable for worse working conditions; another object of the present invention is to provide a method for preparing the same; it is another object of the present invention to provide a method for preparing a coating comprising the coating.
The technical scheme is as follows: in order to achieve the aim, the invention provides an antifriction and wear-resistant coating for a sliding bearing, which comprises the following components in percentage by mass: 0.5-1.5 per mill of graphene, 1-2 percent of zirconium phosphate, 8-15 percent of polytetrafluoroethylene, 8-15 percent of molybdenum disulfide, 18-22 percent of binder, 3-5 percent of curing agent, 1-5 percent of auxiliary agent and the balance of solvent.
In some embodiments, the binder is an E20 epoxy.
In some embodiments, the curing agent is a polyamide.
In some embodiments, the solvent comprises cyclohexanone, xylene, and n-butanol, the ratio of cyclohexanone: xylene: the mass ratio of n-butanol is 2.
In some embodiments, the graphene is prepared by a liquid phase exfoliation method.
In some embodiments, the preparation method of the antifriction and wear-resistant coating for the sliding bearing comprises the following steps:
1) Preparing three parts of solvent according to a proportion, and respectively dissolving the binder and the curing agent by adopting two parts of solvent to respectively obtain a binder solution and a curing agent solution; dissolving graphene by using one part of solvent, and performing ultrasonic dispersion to obtain a graphene solution;
2) Adding an auxiliary agent into the binder solution, uniformly stirring, then adding the graphene solution, and continuously stirring to obtain a graphene mixed solution;
3) Adding the polytetrafluoroethylene into the graphene mixed solution, uniformly stirring, then continuously adding molybdenum disulfide into the polytetrafluoroethylene, uniformly stirring, then adding zirconium phosphate into the zirconium mixed solution, continuously adding an auxiliary agent into the zirconium mixed solution, and uniformly stirring to obtain a zirconium phosphate mixed solution;
4) And adding the curing agent solution into the zirconium phosphate mixed solution, and uniformly stirring to obtain the antifriction wear-resistant coating for the sliding bearing.
In some embodiments, the adjuvant in step 2) comprises a dispersant and a defoamer.
In some embodiments, the step 3) is performed by using a leveling agent as the auxiliary agent.
In some embodiments, the particle size of the polytetrafluoroethylene is 0.1 μm, the particle size of the molybdenum disulfide is 5 μm, and the zirconium phosphate is in the micron range.
In some embodiments, the method for preparing the coating by using the antifriction and wear-resistant coating for the sliding bearing comprises the following steps:
a) Preheating the sliding bearing;
b) Spraying a priming coat on the sliding bearing, wherein the priming coat is dissolved E20 epoxy resin; the purpose is to enhance the binding force of the coating containing graphene and have the corrosion resistance;
c) The sliding bearing is dried after being sprayed with the priming coat;
d) And then, spraying a coating on the priming coat and curing to obtain the coating.
In some embodiments, the dissolved E20 epoxy is obtained by dissolving E20 epoxy in a solvent that is cyclohexanone: xylene: the mass ratio of n-butyl alcohol is 2:2:1 ratio of the prepared solvent.
In some embodiments, in said step a), the plain bearing is preheated at a temperature of 120 ℃ for 40min; in the step c), the sliding bearing is dried for 20min at the temperature of 100 ℃ after being sprayed with the priming coat; in the step d), the curing temperature is 180 ℃, and the curing time is 60min.
In some embodiments, the spray primer layer is 5 μm thick and the spray coating is 15 μm thick.
The invention principle is as follows: graphene has very high specific surface area, excellent heat conduction performance, excellent toughness and the highest strength in known materials, and the layers of the multilayer graphene have smaller shearing strength, so that the multilayer graphene has wide prospect when being added into a composite material as an additive to be used as a solid lubricant, such as being added into a coating to be sprayed on the surface of a sliding bearing. The zirconium phosphate is added into the coating as an additive, so that the adhesion property of the coating can be improved, the leveling property of the coating is better, the dispersibility of the coating is better, the friction coefficient of the coating is reduced, the wear resistance of the coating is enhanced, and the toxic peculiar smell in the coating is removed.
Has the beneficial effects that: compared with the prior art, the antifriction and wear-resistant coating for the sliding bearing is prepared by adding the graphene and the zirconium phosphate into the coating according to a specific proportion, and the antifriction and wear resistance and various performances of the coating are improved by utilizing the advantages of the graphene and the zirconium phosphate. According to the preparation method of the antifriction and wear-resistant coating for the sliding bearing, the graphene and the micron-sized zirconium phosphate prepared by the liquid phase stripping method are used as additives, and the graphene, the polytetrafluoroethylene and the molybdenum disulfide are added into the antifriction and wear-resistant coating according to a specific proportion, so that the antifriction and wear-resistant coating with better performance is prepared. According to the preparation method of the coating, the coating is sprayed on the friction surface of the sliding bearing to prepare the antifriction wear-resistant coating, so that the coating has a lower friction coefficient, higher wear resistance and more excellent anti-fatigue performance, and has better bonding strength with the sliding bearing. The paint of the present invention may be sprayed onto the surface of single layer metal sliding bearing, double layer metal sliding bearing and multilayer metal sliding bearing. Meanwhile, the coating is not limited to be applied to the friction surface of the sliding bearing, and can be applied to opposite grinding pair parts of different mechanical equipment and parts.
Drawings
The technical solutions and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
FIG. 1 is a view showing a process of spraying an antifriction and wear-resistant coating on a friction surface of a sliding bearing according to the present invention;
FIG. 2 is a friction coefficient test chart of the present invention;
FIG. 3 is a wear resistance test chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of protection of the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The invention provides an antifriction and wear-resistant coating for a sliding bearing, which comprises the following components in percentage by mass: 0.5-1.5 per mill of graphene, 1-2 percent of zirconium phosphate, 8-15 percent of polytetrafluoroethylene, 8-15 percent of molybdenum disulfide, 18-22 percent of adhesive, 3-5 percent of curing agent, 1-5 percent of auxiliary agent and the balance of solvent.
The adhesive is E20 epoxy resin. The curing agent is polyamide. Solvents include cyclohexanone, xylene and n-butanol, cyclohexanone: xylene: the mass ratio of n-butanol is 2. The graphene is prepared by a liquid phase stripping method.
The preparation process of antifriction and antiwear paint for sliding bearing includes the following steps:
1) Preparing three parts of solvent according to a proportion, and respectively dissolving the binder and the curing agent by adopting two parts of solvent to respectively obtain a binder solution and a curing agent solution; dissolving graphene by using one part of solvent, and performing ultrasonic dispersion to obtain a graphene solution;
2) Adding an auxiliary agent into the binder solution, uniformly stirring, adding the graphene solution, and continuously stirring to obtain a graphene mixed solution;
3) Adding polytetrafluoroethylene into the graphene mixed solution, uniformly stirring, then continuously adding molybdenum disulfide, uniformly stirring, then adding zirconium phosphate, continuously adding an auxiliary agent, and uniformly stirring to obtain a zirconium phosphate mixed solution;
4) And adding the curing agent solution into the zirconium phosphate mixed solution, and uniformly stirring to obtain the antifriction wear-resistant coating for the sliding bearing.
In the step 2), the auxiliary agent comprises a dispersing agent and a defoaming agent.
In the step 3), the auxiliary agent is a leveling agent.
The particle size of the polytetrafluoroethylene is 0.1 mu m, the particle size of the molybdenum disulfide is 5 mu m, and the zirconium phosphate is micron-sized.
In some embodiments, a method of making a coating using an antifriction wear resistant coating for a sliding bearing, comprising the steps of:
a) Preheating the sliding bearing;
b) Spraying a priming coat on the sliding bearing, wherein the priming coat is dissolved E20 epoxy resin; aiming at enhancing the binding force of the coating containing graphene and having the anti-corrosion performance;
c) The sliding bearing is dried after being sprayed with the priming coat;
d) And then, spraying a coating on the priming layer and curing to obtain the coating.
The dissolved E20 epoxy resin is obtained by dissolving the E20 epoxy resin in a solvent, wherein the solvent is cyclohexanone: xylene: the n-butyl alcohol is 2:2:1 ratio of the prepared solvent.
In the step a), the sliding bearing is preheated for 40min at the temperature of 120 ℃; in the step c), the sliding bearing is dried for 20min at the temperature of 100 ℃ after being sprayed with the priming coat; in the step d), the curing temperature is 180 ℃, and the curing time is 60min. The thickness of the spraying priming layer is 5 μm, and the thickness of the spraying coating is 15 μm.
Performance detection method
In each embodiment, the disc-shaped test block or the bearing bush sample with the coating for performance detection is prepared by spraying the coating on a bimetallic material (the coating can be sprayed on the surface of a single-layer metal sliding bearing, the surface of a double-layer metal sliding bearing and the surface of a multi-layer metal sliding bearing in practical engineering application, meanwhile, the coating is not limited to be applied to the friction surface of the sliding bearing and can be applied to opposite grinding pair parts of different mechanical equipment and parts), in addition, the proportions of the components in the invention are mass ratios, and the percentages of the components are mass percentages.
The performance detection method comprises the following steps:
bonding strength: the resistance of the coating to detachment from the substrate is judged by the adhesion rating of the coating on the metal substrate measured in accordance with GB/T9286-1998 test for the checks of paint and varnish films, GB/T9286-1998, the standard classifying the test surface into six grades, i.e. 0-5, with 0 being the highest and 5 being the lowest registered. The cutting edge is completely smooth when the cutting level is 0, and no lattice falls off; in the 1-level process, a little coating falls off at the intersection of the cuts, but the cross cutting area is not influenced by more than 5 percent; in the 2-stage process, the coating falls off at the intersection of the cuts and/or along the edges of the cuts, and the affected cross cutting area is obviously more than 5 percent but not more than 15 percent; at level 3, the coating is partially or completely broken along the cutting edge to break the sheet and fall off, and/or partially or completely peels off at different parts of the grid, and the affected cross cutting area is obviously more than 15 percent but not obviously more than 35 percent; at level 4, the coating is peeled off along large fragments at the cutting edge, and/or some squares are partially or completely peeled off, and the affected cross cutting area is obviously more than 35 percent but not more than 65 percent; grade 5 spalled to a degree exceeding grade 4.
As shown in fig. 2, the friction coefficient was measured as follows: the coating is sprayed on a plane disc, and after the coating is cured, the test is carried out by using a ball disc friction tester, wherein the diameter of a pressure ball is
The test environment temperature is 25 +/-1 ℃, the relative humidity is 50 +/-5%, the test is a dry friction test, the load applied to the friction pair is a vertical load, and the friction force between the friction pair is in the horizontal direction. During the test, the central axis of the disc is parallel to the vertical central axis of the ball and is 15mm away from the central axis, the pressure ball is fixed, and the disc rotates. Firstly, a load with the size of 5N is applied to the friction pair, when the load is stabilized at 5N, the equipment automatically starts an acceleration process to drive the planar disk to rotate, and the speed reaches 191rpm in a short time, which is equivalent to the linear speed of 0.3m/s. From the start of the acceleration process of the equipment to the stop of the rotation of the equipment, the time is set to 6min.
As shown in fig. 3, the abrasion resistance test procedure is as follows: the coating is sprayed on a plane disc, after the coating is cured, a reciprocating type friction testing machine is used for testing, the testing environment temperature is 25 +/-1 ℃, the relative humidity is 50 +/-5%, the testing is a dry friction test, the load applied to a friction pair is a vertical load, and the friction force between the friction pairs is in the horizontal direction. During the test, the pressure ball is fixed, the disc reciprocates back and forth, and the reciprocating one-way stroke of the disc is 2mm. Firstly, a load with the size of 5N is applied to the friction pair, when the load is stabilized at 5N, the equipment is automatically started and drives the planar disc to reciprocate, and the reciprocating frequency is 50Hz. From the start of the reciprocation to the stop of the rotation of the apparatus, the time was set to 60min.
The specific wear rate in this test was as follows:
calculated by the formula, wherein W is specific wear rate in mm 3 V (N · m); Δ V is the volumetric wear; f is the load; l is the sliding distance.
Fatigue strength: the coatings were sprayed onto test bearing shells and, after curing of the coatings, the tests were carried out using a bearing shell fatigue tester (model number: DE972 SAPPHIR, manufactured by DANA Glacier Vandervall, UK). The test adopts a load increasing method, after the test tile is subjected to no-load running-in for 30 minutes, the load of 20MPa is increased to the initial load (selected according to the experience of different bearing bush materials) at the time interval of every 30 minutes, the test tile is detected to have no damage after running for 20 hours, and if the test is passed (no damage is seen by naked eyes), the first-level load (5 MPa) is increased to continue the test. Repeating the steps until the test bush is in fatigue damage, wherein the previous stage load of the load when the test bush is in fatigue damage is the fatigue strength of the bearing bush material on a sapphire bearing bush fatigue testing machine. If the test tile fails at the initial load, the test is invalid. The lubricating oil for the test is Shell Rimula R3 Multi 10W-30, the oil supply pressure of the lubricating oil is 6 +/-0.2 bar during the test, the oil supply temperature of the lubricating oil is 70 +/-2 ℃ during the test, and the rotating speed of a test shaft is 3000R/min.
Example 1
The coating comprises the following components in percentage by weight:
preparing the coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing three parts of solvent;
2) Dissolving E20 epoxy resin and polyamide curing agent in the solvent in two parts respectively;
3) Adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring;
4) Adding graphene prepared by a liquid phase stripping method into the last part of solvent, and dispersing for 30 minutes by using ultrasonic waves;
5) Pouring the graphene solution dispersed by ultrasonic waves into the E20 epoxy resin solution, and fully and uniformly stirring;
6) Adding Polytetrafluoroethylene (PTFE) powder (with the particle size of 0.1 mu m) into the E20 epoxy resin liquid, and fully and uniformly stirring;
7) Molybdenum disulfide (MoS) 2 ) Adding the powder (with the particle size of 5 mu m) into the E20 epoxy resin liquid, and fully and uniformly stirring;
8) Adding zirconium phosphate (micron-sized) into the E20 epoxy resin liquid, and fully and uniformly stirring. Then adding the flatting agent, and fully and uniformly stirring again;
9) And pouring the polyamide curing agent solution into the E20 epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction and wear-resistant paint containing the graphene and the zirconium phosphate.
Example 2
The coating material proportion is as follows:
preparing the coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing three parts of solvent.
2) The E20 epoxy resin and the polyamide curing agent are respectively dissolved in two parts of the solvent.
3) And adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring.
4) And adding the graphene prepared by the liquid phase stripping method into the last part of solvent, and dispersing for 30 minutes by using ultrasonic waves.
5) And pouring the graphene solution dispersed by the ultrasonic waves into the E20 epoxy resin solution, and fully and uniformly stirring.
6) Polytetrafluoroethylene (PTFE) powder (particle size 0.1 μm) was added to the E20 epoxy resin liquid, and the mixture was sufficiently stirred.
7) Molybdenum disulfide (MoS) 2 ) The powder (particle size 5 μm) was added to the E20 epoxy resin liquid and sufficiently and uniformly stirred.
8) Adding zirconium phosphate (micron-sized) into the E20 epoxy resin liquid, and fully and uniformly stirring. Then adding the flatting agent, and fully and uniformly stirring again.
9) And pouring the polyamide curing agent solution into the E20 epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction wear-resistant coating containing the graphene and the zirconium phosphate.
Example 3
The coating comprises the following components in percentage by weight:
preparing the coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing three parts of solvent.
2) The E20 epoxy resin and the polyamide curing agent are respectively dissolved in two parts of the solvent.
3) And adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring.
4) And adding the graphene prepared by the liquid phase stripping method into the last part of solvent, and dispersing for 30 minutes by using ultrasonic waves.
5) And pouring the graphene solution dispersed by the ultrasonic waves into the E20 epoxy resin solution, and fully and uniformly stirring.
6) Polytetrafluoroethylene (PTFE) powder (particle size 0.1 μm) was added to the E20 epoxy resin liquid, and sufficiently stirred uniformly.
7) Molybdenum disulfide (MoS) 2 ) The powder (particle size 5 μm) was added to the E20 epoxy resin liquid and sufficiently and uniformly stirred.
8) Adding zirconium phosphate (micron-sized) into the E20 epoxy resin liquid, and fully and uniformly stirring. Then adding the flatting agent, and fully and uniformly stirring again.
9) And pouring the polyamide curing agent solution into the E20 epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction wear-resistant coating containing the graphene and the zirconium phosphate.
Example 4
The coating material proportion is as follows:
preparing the coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing three parts of solvent.
2) The E20 epoxy resin and the polyamide curing agent were dissolved in two parts of the above solvent, respectively.
3) And adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring.
4) And adding the graphene prepared by the liquid phase stripping method into the last part of solvent, and dispersing for 30 minutes by using ultrasonic waves.
5) And pouring the graphene solution dispersed by the ultrasonic waves into the E20 epoxy resin solution, and fully and uniformly stirring.
6) Polytetrafluoroethylene (PTFE) powder (particle size 0.1 μm) was added to the E20 epoxy resin liquid, and the mixture was sufficiently stirred.
7) Molybdenum disulfide (MoS) 2 ) The powder (particle size 5 μm) was added to the E20 epoxy resin liquid and sufficiently and uniformly stirred.
8) Adding leveling agent into the E20 epoxy resin liquid added with the additive, and fully and uniformly stirring.
9) And pouring the polyamide curing agent solution into the E20 epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction wear-resistant coating containing graphene but not containing zirconium phosphate.
Example 5
The coating comprises the following components in percentage by weight:
preparing a coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing two parts of solvent.
2) The two solvents are used for dissolving the E20 epoxy resin and the polyamide curing agent respectively.
3) And adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring.
4) Polytetrafluoroethylene (PTFE) powder (particle size 0.1 μm) was added to the E20 epoxy resin liquid, and the mixture was sufficiently stirred.
5) Molybdenum disulfide (MoS) 2 ) The powder (particle size 5 μm) was added to the E20 epoxy resin liquid and sufficiently stirred.
6) Adding zirconium phosphate (micron-sized) into the E20 epoxy resin liquid, and fully and uniformly stirring. Then adding the flatting agent, and fully and uniformly stirring again.
7) And pouring the polyamide curing agent solution into the E20 epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction and wear-resistant coating not containing graphene but containing zirconium phosphate.
Example 6
The coating comprises the following components in percentage by weight:
preparing a coating:
1) Cyclohexanone: xylene: n-butanol, as per 2:2:1, preparing two parts of solvent.
2) The two solvents are used for dissolving the E20 epoxy resin and the polyamide curing agent respectively.
3) And adding a dispersing agent and a defoaming agent into the E20 epoxy resin solution, and fully and uniformly stirring.
4) Polytetrafluoroethylene (PTFE) powder (particle size 0.1 μm) was added to the E20 epoxy resin liquid, and sufficiently stirred uniformly.
5) Molybdenum disulfide (MoS) 2 ) The powder (particle size 5 μm) was added to the E20 epoxy resin liquid and sufficiently and uniformly stirred.
6) Adding a leveling agent into the E20 epoxy resin liquid added with the additive, and fully and uniformly stirring.
7) And pouring the curing agent solution into the epoxy resin solution added with the additive, and fully and uniformly stirring to obtain the antifriction wear-resistant coating without graphene and zirconium phosphate.
3 results of Performance testing
The performance detection results of the embodiment show that the addition of the graphene prepared by the liquid phase stripping method and the micron-sized zirconium phosphate greatly improves various performances of the sliding bearing coating.
In the foregoing embodiments, the descriptions of the respective embodiments have their respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The antifriction and wear-resistant coating for a sliding bearing provided by the embodiment of the invention, the preparation method thereof and the preparation method of the coating are described in detail, the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. The antifriction and wear-resistant coating for the sliding bearing is characterized by comprising the following components in percentage by mass: 0.5-1.5 per mill of graphene, 1-2 percent of zirconium phosphate, 8-15 percent of polytetrafluoroethylene, 8-15 percent of molybdenum disulfide, 18-22 percent of binder, 3-5 percent of curing agent, 1-5 percent of auxiliary agent and the balance of solvent.
2. An antifriction coating for a plain bearing according to claim 1, wherein the binder is an E20 epoxy.
3. An antifriction coating for a plain bearing according to claim 1 wherein the curing agent is a polyamide.
4. An antifriction coating for slide bearings according to claim 1 wherein the solvent comprises cyclohexanone, xylene and n-butanol, the ratio of cyclohexanone: xylene: the mass ratio of n-butanol is 2.
5. An antifriction wear-resistant coating for a sliding bearing in accordance with claim 1 wherein the graphene is prepared by a liquid phase exfoliation method.
6. A method of producing an antifriction coating for a plain bearing according to any one of claims 1-5 comprising the steps of:
1) Preparing three parts of solvent according to a proportion, and respectively dissolving the binder and the curing agent by adopting two parts of solvent to respectively obtain a binder solution and a curing agent solution; dissolving graphene by using one part of solvent, and performing ultrasonic dispersion to obtain a graphene solution;
2) Adding an auxiliary agent into the binder solution, uniformly stirring, adding the graphene solution, and continuously stirring to obtain a graphene mixed solution;
3) Adding the polytetrafluoroethylene into the graphene mixed solution, uniformly stirring, continuously adding molybdenum disulfide, uniformly stirring, adding zirconium phosphate, continuously adding the auxiliary agent, and uniformly stirring to obtain a zirconium phosphate mixed solution;
4) And adding the curing agent solution into the zirconium phosphate mixed solution, and uniformly stirring to obtain the antifriction wear-resistant coating for the sliding bearing.
7. A method of producing an antifriction coating composition for a plain bearing according to claim 6 wherein in step 2), the auxiliary agent comprises a dispersant and an antifoaming agent.
8. A method for preparing an antifriction and wear-resistant coating for a sliding bearing according to claim 6 wherein in step 3) the additive is a leveling agent.
9. A method of producing an antifriction and wear-resistant coating for a plain bearing according to claim 6 wherein the particle size of the polytetrafluoroethylene is 0.1 μm, the particle size of the molybdenum disulphide is 5 μm and the zirconium phosphate is in the micron range.
10. A method of producing a coating using an antifriction coating for slide bearings according to any one of claims 1-5, characterized by the steps of:
a) Preheating the sliding bearing;
b) Spraying a priming coat on the sliding bearing, wherein the priming coat is dissolved E20 epoxy resin;
c) The sliding bearing is dried after being sprayed with the priming coat;
d) And spraying a coating on the priming layer and then curing to obtain the coating.
11. A method of producing a coating of an antifriction coating for slide bearings according to claim 10 wherein the dissolved E20 epoxy is obtained by dissolving E20 epoxy in a solvent which is cyclohexanone: xylene: the mass ratio of n-butyl alcohol is 2:2:1 ratio of the prepared solvent.
12. A method of producing a coating of an antifriction coating for slide bearings according to claim 10 wherein in step a) the slide bearing is preheated at a temperature of 120 ℃; in the step c), the sliding bearing is dried at the temperature of 100 ℃ after being sprayed with the priming coat; in the step d), the curing temperature is 180 ℃.
13. A method of producing a coating of an antifriction wear-resistant coating for slide bearings according to claim 10 wherein the sprayed primer layer is 5 μm thick and the sprayed coating is 15 μm thick.
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