CN117818180A - Wear-resistant layer, side bearing comprising wear-resistant layer and preparation method of side bearing - Google Patents
Wear-resistant layer, side bearing comprising wear-resistant layer and preparation method of side bearing Download PDFInfo
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- CN117818180A CN117818180A CN202311657917.4A CN202311657917A CN117818180A CN 117818180 A CN117818180 A CN 117818180A CN 202311657917 A CN202311657917 A CN 202311657917A CN 117818180 A CN117818180 A CN 117818180A
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Abstract
The application provides a wear-resistant layer, a side bearing containing the wear-resistant layer and a preparation method of the side bearing, wherein the wear-resistant layer uses PTFE as a matrix and one or more fillers are added, the PTFE matrix and the fillers are uniformly mixed and pressed into cylindrical sintering and are turned into a diaphragm with a certain thickness, and then surface activation treatment is carried out to obtain the wear-resistant layer, and the wear-resistant layer in the embodiment has high wear resistance. Meanwhile, in the assembly of the side bearing, the surface adhesion of the wear-resistant layer is solved by adopting a chemical method, the adhesion area and the sliding resistance in the plane sliding direction are increased by adopting surface sand blasting treatment on the metal substrate, when the wear-resistant layer is adhered to the metal substrate, the primer with relatively high affinity with both the metal substrate and the adhesive is firstly adopted, and then the adhesive with relatively good adhesion with the surface treated by the wear-resistant layer is used, so that the problem that the adhesive cannot simultaneously have relatively good adhesion to the surface of the metal substrate and the surface treated by the wear-resistant layer is solved.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a wear-resistant layer, a side bearing comprising the wear-resistant layer and a preparation method of the side bearing.
Background
Currently, side bearings include gap-type elastic side bearings and constant contact elastic side bearings. The clearance type elastic side bearing, i.e., when the vehicle is traveling in a straight line, generally the upper and lower side bearing bodies do not contact, but there is a certain clearance. Therefore, the gap type side bearing has the defects that when smaller side rolling occurs, the vehicle body cannot be restrained by friction resistance moment, the critical speed is low, and the operation is poor. The existing constant contact elastic side bearing has the following defects: most elastic side bearings adopt a composite structure of rubber and metal, the bonding strength between the rubber elastomer and the metal member is low, the problems of adhesive opening and insufficient bonding firmness are easy to occur, and in the later use process, the bonding surface is easy to generate fatigue damage under the action of alternating load.
In the use process of the side bearing, the rubber can generate creep, the upper abrasion plate cannot be completely kept horizontal due to non-uniform creep, the upper abrasion plate cannot be completely contacted with a carriage, the rotation moment is reduced, and the abrasion of the upper abrasion plate is increased. At present, a metal structure is adopted for the side bearing to be compounded with a wear-resistant layer, but the wear-resistant layer takes PTFE (polytetrafluoroethylene) as a main material, and when the wear-resistant layer is bonded and compounded with the metal structure, the wear-resistant layer is difficult to bond, so that surface tackiness treatment is required, but a single pure adhesive cannot simultaneously have better adhesive force on both the metal surface and the surface treated by the wear-resistant layer. Therefore, the service life of the existing side bearing is shorter, usually only 4-5 years, so that the use and maintenance cost is higher, the environment protection is not facilitated, the performance in the use process is changed greatly, the running stability of the railway vehicle is reduced, and even potential safety hazards are generated.
Disclosure of Invention
The present application aims to solve, at least to some extent, one of the technical problems in the related art.
Therefore, the purpose of the present application is to provide a wear-resistant layer, a side bearing including the wear-resistant layer, and a method for manufacturing the side bearing, wherein the wear-resistant layer uses PTFE as a matrix, and one or more of nano silica, graphite, polystyrene, polyimide, polyphenylene sulfide, polyether ether ketone, glass fiber, carbon fiber, and the like are added as a filler, the PTFE matrix and the filler are uniformly mixed, pressed into a cylindrical sintered membrane, and then subjected to surface activation treatment to obtain the wear-resistant layer, and the wear-resistant layer in this embodiment has high wear resistance. Meanwhile, the surface adhesion is solved by adopting a chemical method to treat the wear-resistant layer, the adhesion area and the sliding resistance in the plane sliding direction are increased by adopting surface sand blasting treatment to the metal substrate, when the wear-resistant layer and the metal substrate are glued, the primer with relatively high affinity to both the metal substrate and the adhesive is firstly adopted, and then the adhesive with relatively good adhesion to the treated surface of the wear-resistant layer is used, so that the problem that a single adhesive can not simultaneously have relatively good adhesion to both the surface of the metal substrate and the treated surface of the wear-resistant layer is solved, the compound firmness of the wear-resistant layer and the metal substrate is increased, the service life of the side bearing is prolonged, and the running stability of a railway vehicle is further improved.
In order to achieve the above purpose, the wear-resistant layer provided by the application comprises the following components in percentage by mass based on the wear-resistant layer: 84% -90% of PTFE and the balance of filler; wherein the filler comprises at least one of nano silicon dioxide, graphite, polyphenyl ester, polyimide, polyphenylene sulfide, polyether ether ketone, glass fiber, nano aluminum oxide or carbon fiber.
In some embodiments, the filler comprises, based on the wear layer, 1.2% -2.5% of nano silicon dioxide, 1.5% of graphite, 1.5% of polystyrene, 1.2% of polyimide, 1.5% of polyphenylene sulfide, 1.3% -2.8% of polyether ether ketone, 1% -2.5% of glass fiber, 1% -2% of nano aluminum oxide, or 0.5% -0.8% of carbon fiber.
In some embodiments, the method of making the wear layer is: uniformly mixing the PTFE powder and the filler according to a set proportion, pressing and forming, and sintering for 18-24 hours at 300-350 ℃; and the wear-resistant layer is manufactured into a membrane with the thickness of 1.5-2mm by turning.
A second aspect of the present application proposes a side bearing comprising a wear layer as described in any one of the embodiments above; and a metal substrate; wherein the metal substrate and the wear-resistant layer are formed in a composite mode, and the wear-resistant layer is positioned on one side of the metal substrate.
In some embodiments, the side bearing further comprises a binder layer and an adhesive layer, both between the metal substrate and the wear layer, wherein the binder layer is between the metal substrate and the adhesive layer; the adhesive layer is located between the binder layer and the wear layer.
In a third aspect, the present application provides a method of making a side bearing, the method comprising
Carrying out surface sand blasting treatment on a metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer;
coating an adhesive on the dried bonding agent layer to form an adhesive layer, adhering the passivated wear-resistant layer on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding;
and (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
In some embodiments, the bonding agent is an epoxy-based adhesive.
In some embodiments, the adhesive comprises an epoxy AB glue, a universal glue, or a solder glue.
In some embodiments, the passivation treatment method of the wear-resistant layer is to brush the adhesion surface of the wear-resistant layer with corrosive liquid for 5-10min and then erase the adhesion surface of the wear-resistant layer to increase the adhesion of the adhesion surface of the wear-resistant layer.
In some embodiments, the etching solution is sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane, or sodium naphthalene diol dimethyl ether.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a side bearing according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a side bearing according to an embodiment of the present application;
FIG. 3 is a side bearing physical diagram according to one embodiment of the present application;
FIG. 4 is a flow chart of a method for manufacturing a side bearing according to an embodiment of the present application;
in the figure, 1, a metal substrate; 2. a binder layer; 3. an adhesive layer; 4. and a wear-resistant layer.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
Referring to fig. 1, in order to achieve the above object, the present application provides a wear-resistant layer, which comprises the following components in percentage by mass based on the wear-resistant layer: 84% -90% of PTFE and the balance of filler; wherein the filler comprises at least one of nano silicon dioxide, graphite, polyphenyl ester, polyimide, polyphenylene sulfide, polyether ether ketone, glass fiber, nano aluminum oxide or carbon fiber.
Wherein the wear-resistant layer comprises 84% -90% by mass of PTFE based on the wear-resistant layer, i.e. 84% -90% by mass of PTFE is the total mass of the wear-resistant layer, further 84% -86% by mass of PTFE is the total mass of the wear-resistant layer, for example 84%, 85% and 86%, 90% by mass of PTFE or any value in the interval thereof, wherein when the mass of PTFE is too low, such as below 84% by mass of the total mass of the wear-resistant layer, it will decrease the wear resistance of the wear-resistant layer, and when the mass of PTFE is too high, such as above 90% by mass of the total mass of the wear-resistant layer, it will decrease the strength of the wear-resistant layer.
The filler in this embodiment includes at least one of nano silica, graphite, polystyrene, polyimide, polyphenylene sulfide, polyether ether ketone, glass fiber, or carbon fiber. Further in some embodiments, the wear resistant layer is based on a filler comprising a plurality of the following components in percentage by mass, 1.2% -2.5% of nano silicon dioxide, 1.5% of graphite, 1.5% of polystyrene, 1.2% of polyimide, 1.5% of polyphenylene sulfide, 1.3% -2.8% of polyetheretherketone, 1% -2.5% of glass fiber, 1% -2% of nano aluminum oxide, or 0.5% -0.8% of carbon fiber.
It is understood that the mass of the nano-silica is 1.2% -2.5% of the total mass of the wear-resistant layer, for example, the mass of the nano-silica is 1.2%, 2% and 2.5% of the total mass of the wear-resistant layer or any value in the interval thereof, wherein when the mass of the nano-silica is too low, such as it is lower than 1.2% of the total mass of the wear-resistant layer, it may reduce the wear resistance of the wear-resistant layer, and when the mass of the nano-silica is too high, such as it is higher than 2.5% of the total mass of the wear-resistant layer, it may increase the manufacturing cost of the wear-resistant layer.
The mass of the graphite is 1.5% of the total mass of the wear-resistant layer, and the graphite is used for adjusting the wear-resistant coefficient of the wear-resistant layer; the mass of the polyphenyl ester is 1.5% of the total mass of the wear-resistant layer, and the polyphenyl ester is used for adjusting the self-lubricity of the wear-resistant layer; the mass of polyimide is 1.2% of the total mass of the wear-resistant layer, and is used for adjusting the wear-resistant coefficient of the wear-resistant layer; the mass of the polyphenylene sulfide is 1.5% of the total mass of the wear-resistant layer, and the polyphenylene sulfide is used for adjusting the strength of the wear-resistant layer; the mass of the polyether-ether-ketone is 1.3% -2.8% of the total mass of the wear-resistant layer, and is 1.3%, 1.5%, 2%, 2.8% or any value in the interval thereof, for adjusting the strength of the wear-resistant layer. The mass of the glass fiber is 1% -2.5% of the total mass of the wear-resistant layer, and is 1%, 1.5%, 2% or 2.5% or any value in the interval thereof for adjusting the strength of the wear-resistant layer. The mass of the carbon fiber is 0.5% -0.8% of the total mass of the wear-resistant layer, and is exemplified by 0.5%, 0.6%, 0.8% or any value in the interval thereof, for adjusting the strength of the wear-resistant layer.
The preparation method of the wear-resistant layer comprises the following steps: uniformly mixing PTFE powder and a filler according to a set proportion, pressing and forming, and sintering at 300-350 ℃ for 18-24 hours for fixing; and the wear-resistant layer is manufactured into a membrane with proper thickness of 1.5-2mm by turning. For example, after uniformly mixing PTFE powder and filler according to a set proportion, pressing to form, for example, cylindrical shape, sintering and fixing, and turning to manufacture the wear-resistant layer into a diaphragm with proper thickness.
A second aspect of the present application proposes a side bearing comprising a wear layer and a metal baseplate according to any of the embodiments described above; wherein the metal base plate and the wear-resistant layer are formed in a composite way, and the wear-resistant layer is positioned on one side of the metal base plate.
The metal substrate is a plate body with a certain thickness as shown in fig. 1, and comprises an upper surface and a lower surface, wherein the upper surface of the metal substrate is attached with a wear-resistant layer, the metal substrate and the wear-resistant layer are formed in a composite manner, and the wear-resistant layer is positioned on one side of the metal substrate.
In some embodiments, the side bearing further comprises a binder layer and an adhesive layer, both of which are located between the metal substrate and the wear layer, wherein the binder layer is located between the metal substrate and the adhesive layer; the adhesive layer is positioned between the bonding agent layer and the wear-resistant layer.
In some schemes, as shown in fig. 2, the side bearing further comprises a bonding agent layer and an adhesive layer, namely, the bonding agent layer is attached to the upper surface of the metal substrate, meanwhile, the adhesive layer is attached to the upper surface of the bonding agent layer, and the wear-resistant layer is attached to the upper surface of the adhesive layer, so that the bonding agent layer is located between the metal substrate and the adhesive layer; the adhesive layer is positioned between the bonding agent layer and the wear-resistant layer. The bonding agent is epoxy adhesive, such as amine cured epoxy adhesive and anhydride cured adhesive, and is coated on the upper surface of the metal substrate, and dried to obtain a bonding agent layer; and the adhesive is coated on the upper surface of the bonding agent layer, and the adhesive layer is formed after the adhesive is cured, wherein the adhesive comprises epoxy resin AB glue, all-purpose glue or welding glue. In addition, a side bearing embodiment is shown in FIG. 3.
In a third aspect, the present application provides a method of making a side bearing, including
S1: carrying out surface sand blasting treatment on the metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer;
s2: coating an adhesive on the dried bonding agent layer to form an adhesive layer, adhering the passivated wear-resistant layer on the non-dried adhesive layer, and performing high-temperature curing for preliminary molding;
s3: and (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
Specifically, in S1, performing surface sandblasting treatment on a metal substrate, coating a binder on one side of the metal substrate to form a binder layer, and airing the binder layer; the bonding agent is amine cured epoxy glue, the bonding agent is coated on the upper surface of the metal substrate, and the bonding agent layer is obtained after airing.
In S2, coating an adhesive on the dried bonding agent layer to form an adhesive layer, wherein the adhesive comprises epoxy resin AB glue, universal glue or welding glue; and adhering the wear-resistant layer after passivation treatment on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding. The passivation treatment method of the wear-resistant layer comprises the steps of brushing the adhesion surface of the wear-resistant layer with corrosive liquid for 5-10min, and then erasing to increase the adhesion of the adhesion surface of the wear-resistant layer. Wherein the corrosive liquid is sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane or sodium naphthalene diol dimethyl ether.
PTFE is difficult to bond and is analyzed in terms of its physical properties, mainly for several reasons:
(1) The surface energy is low, and the critical surface tension is only 1.85 multiplied by 10 -2 N/m. The advancing contact angle (θd) of PTFE is 118 DEG, the receding contact angle (θr) is 91 DEG, the contact angle (θ) is 104 DEG, and is larger in all materials, and the larger the contact angle is, the smaller the wetting degree is, i.e., the worse the wettability is, the adhesive cannot sufficiently wet PTFE, and thus cannot adhere wellAttached to PTFE;
(2) The crystallinity is large, the chemical stability is good, the swelling and dissolution of PTFE are more difficult than those of non-crystalline polymers, when the adhesive is coated on the surface of PTFE, the interdiffusion and entanglement of polymer molecular chains are difficult to occur, and stronger adhesive force cannot be formed;
(3) PTFE structures are highly symmetrical and belong to nonpolar polymers. The adhesion of the adhesive to the PTFE surface is caused by intermolecular forces including orientation forces, induced forces and dispersion forces, whereas the non-polar PTFE surface does not have the conditions of forming orientation forces and induced forces, but can only form weaker dispersion forces, thus having poorer adhesion properties; the solubility parameter SP value of PTFE is therefore small, and thus the adhesion to other substances is also small.
The adhesion surface of the wear-resistant layer in this embodiment is passivated by a corrosive liquid, which reacts chemically with the PTFE plastic to tear off some of the fluorine atoms from the surface of the material, leaving behind a carbonized layer and some polar groups on the surface. Infrared spectrum shows that the surface is introduced with polar groups such as hydroxyl, carbonyl, unsaturated bond and the like, and the groups can increase the surface energy, reduce the contact angle and improve the wettability, and the surface is changed from difficult adhesion to adhesion. Therefore, the surface adhesion is solved by adopting a chemical method to treat the wear-resistant layer, the surface sand blasting treatment is adopted to increase the adhesion area and the sliding resistance in the plane sliding direction, when the wear-resistant layer is adhered to the metal substrate, the adhesive which has higher affinity with both metal and adhesive is firstly adopted, and then the adhesive which has better adhesion with the treatment surface of the wear-resistant layer is used, so that the problem that a single adhesive cannot simultaneously have better adhesion to both the metal surface and the treatment surface of the wear-resistant layer is solved.
And S3, finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
Example 1
The wear-resistant layer comprises the following components in percentage by mass based on the wear-resistant layer: 90.00% of PTFE, 1.20% of polyimide, 1.20% of nano silicon dioxide, 1.50% of polyphenylene sulfide, 1.50% of graphite, 1.30% of polyether-ether-ketone, 1.50% of polyphenyl ester, 1.00% of glass fiber and 0.80% of carbon fiber. Uniformly mixing PTFE powder and a filler according to a set proportion, pressing and forming, and sintering and fixing for 20 hours at 300 ℃; and the wear-resistant layer is made into a membrane with the thickness of 1.5mm by turning.
Carrying out surface sand blasting treatment on the metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer; the bonding agent is acid anhydride curing glue, the bonding agent is coated on the upper surface of the metal substrate, and the bonding agent layer is obtained after airing. Coating an adhesive on the dried bonding agent layer to form an adhesive layer, wherein the adhesive is welding adhesive; and adhering the wear-resistant layer after passivation treatment on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding. The passivation treatment method of the wear-resistant layer comprises the steps of brushing an adhesion surface of the wear-resistant layer for 5min by using corrosive liquid, and then erasing to increase the adhesion of the adhesion surface of the wear-resistant layer, wherein the corrosive liquid is sodium naphthalene tetrahydrofuran. And (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
Example 2
The wear-resistant layer comprises the following components in percentage by mass based on the wear-resistant layer: 87.20% of PTFE, 1.20% of polyimide, 2.00% of nano silicon dioxide, 1.50% of polyphenylene sulfide, 1.50% of graphite, 1.50% of polyether-ether-ketone, 1.50% of polyphenyl ester, 1.00% of nano aluminum oxide, 0.80% of carbon fiber and 1.80% of glass fiber. Uniformly mixing PTFE powder and a filler according to a set proportion, pressing and forming, and sintering at 350 ℃ for 18 hours for fixing; and the wear-resistant layer is made into a membrane with the thickness of 2mm by turning. Carrying out surface sand blasting treatment on the metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer; the bonding agent is acid anhydride curing glue, the bonding agent is coated on the upper surface of the metal substrate, and the bonding agent layer is obtained after airing. Coating an adhesive on the dried bonding agent layer to form an adhesive layer, wherein the adhesive is all-purpose adhesive; and adhering the wear-resistant layer after passivation treatment on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding. The passivation treatment method of the wear-resistant layer comprises the steps of brushing the adhesive surface of the wear-resistant layer for 10min by using corrosive liquid, and then erasing to increase the adhesiveness of the adhesive surface of the wear-resistant layer, wherein the corrosive liquid is sodium biphenyl dioxane. And (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
Example 3
The wear-resistant layer comprises the following components in percentage by mass based on the wear-resistant layer: 85.00% of PTFE, 1.20% of polyimide, 2.50% of nano silicon dioxide, 1.50% of polyphenylene sulfide, 1.50% of graphite, 1.50% of polyether-ether-ketone, 1.50% of polyphenyl ester, 2.00% of nano aluminum oxide, 0.50% of carbon fiber and 2.80% of glass fiber. Uniformly mixing PTFE powder and a filler according to a set proportion, pressing and forming, and sintering at 320 ℃ for 24 hours for fixing; and the wear-resistant layer is manufactured into a membrane with a proper thickness of 1.8mm by turning.
Carrying out surface sand blasting treatment on the metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer; the bonding agent is acid anhydride curing glue, the bonding agent is coated on the upper surface of the metal substrate, and the bonding agent layer is obtained after airing. Coating an adhesive on the dried bonding agent layer to form an adhesive layer, wherein the adhesive is epoxy resin AB adhesive; and adhering the wear-resistant layer after passivation treatment on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding. The passivation treatment method of the wear-resistant layer comprises the steps of coating the adhesive surface of the wear-resistant layer with corrosive liquid for 8min and then erasing to increase the adhesiveness of the adhesive surface of the wear-resistant layer, wherein the corrosive liquid is sodium naphthalene diol dimethyl ether. And (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
Comparative example 1
The passivation treatment method of the wear-resistant layer is a surface firing method, and other technical characteristics are the same as those of the embodiment 1. Wherein the obtained side bearing has insufficient bonding strength and is easy to fall off.
Comparative example 2
The passivation treatment method of the wear-resistant layer is a strong acid and strong alkali corrosion method, and other technical characteristics are the same as those of the embodiment 1. Wherein the obtained side bearing has insufficient bonding strength and is easy to fall off.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any at least one embodiment or example.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. The wear-resistant layer is characterized by comprising the following components in percentage by mass based on the wear-resistant layer: 84% -90% of PTFE and the balance of filler; wherein the filler comprises at least one of nano silicon dioxide, graphite, polyphenyl ester, polyimide, polyphenylene sulfide, polyether ether ketone, glass fiber, nano aluminum oxide or carbon fiber.
2. The wear-resistant layer according to claim 1, wherein the filler comprises a plurality of the following components in percentage by mass, based on the wear-resistant layer, 1.2% -2.5% of nano silicon dioxide, 1.5% of graphite, 1.5% of polyphenyl ester, 1.2% of polyimide, 1.5% of polyphenyl thioether, 1.3% -2.8% of polyether ether ketone, 1% -2.5% of glass fiber, 1% -2% of nano aluminum oxide or 0.5% -0.8% of carbon fiber.
3. The wear resistant layer according to claim 1 or 2, characterized in that the wear resistant layer is produced by the following method: uniformly mixing the PTFE powder and the filler according to a set proportion, pressing and forming, and sintering for 18-24 hours at 300-350 ℃; and the wear-resistant layer is manufactured into a membrane with the thickness of 1.5-2mm by turning.
4. A side bearing comprising the wear layer of any one of claims 1-3 and a metal base plate; wherein the metal substrate and the wear-resistant layer are formed in a composite mode, and the wear-resistant layer is positioned on one side of the metal substrate.
5. The side bearing of claim 4, further comprising a bonding agent layer and an adhesive layer, both between the metal substrate and the wear layer, wherein the bonding agent layer is between the metal substrate and the adhesive layer; the adhesive layer is located between the binder layer and the wear layer.
6. A method of making a side bearing as defined in claim 4 or 5, comprising
Carrying out surface sand blasting treatment on a metal substrate, coating a bonding agent on one side of the metal substrate to form a bonding agent layer, and airing the bonding agent layer;
coating an adhesive on the dried bonding agent layer to form an adhesive layer, adhering the passivated wear-resistant layer on the non-dried adhesive layer, and performing high-temperature curing and preliminary molding;
and (5) finishing the preliminarily molded side bearing, painting, and airing to obtain the side bearing.
7. The method of claim 6, wherein the binder is an epoxy-based binder.
8. The method of claim 6, wherein the adhesive comprises an epoxy AB glue, a universal glue, or a solder glue.
9. The method according to claim 6, wherein the passivation treatment method of the wear-resistant layer is to coat the adhesion surface of the wear-resistant layer with a corrosive liquid for 5-10min and then erase the surface to increase the adhesion of the adhesion surface of the wear-resistant layer.
10. The method according to claim 9, wherein the etching solution is sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane or sodium naphthalene diol dimethyl ether.
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|---|---|---|---|
| CN202311657917.4A CN117818180A (en) | 2023-12-05 | 2023-12-05 | Wear-resistant layer, side bearing comprising wear-resistant layer and preparation method of side bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311657917.4A CN117818180A (en) | 2023-12-05 | 2023-12-05 | Wear-resistant layer, side bearing comprising wear-resistant layer and preparation method of side bearing |
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