Wear-resistant layer, side bearing comprising the wear-resistant layer, and preparation method of the side bearing

Abstract

The present application proposes a wear-resistant layer, a side bearing including the wear-resistant layer, and a preparation method of the side bearing. The wear-resistant layer is based on PTFE and one or more fillers are added. The PTFE matrix and the filler are evenly mixed and then pressed into a cylindrical shape, sintered, and turned into a membrane of a certain thickness, and then surface activated to obtain the wear-resistant layer. The wear-resistant layer in this embodiment has high wear resistance. At the same time, during the assembly of the side bearing, the wear-resistant layer is treated with a chemical method to solve the surface adhesion, and the metal substrate is treated with surface sandblasting to increase the adhesion area and the sliding resistance in the plane sliding direction. When the wear-resistant layer and the metal substrate are bonded, a primer with a relatively high affinity to both the metal substrate and the adhesive is first used, and then an adhesive with good adhesion to the surface treated with the wear-resistant layer is used. This solves the problem that an adhesive cannot have good adhesion to both the surface of the metal substrate and the surface treated with the wear-resistant layer at the same time.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a wear-resistant layer, a side bearing including the wear-resistant layer, and a preparation method of the side bearing. Background Art

[0002] At present, side bearings include gap-type elastic side bearings and constant-contact elastic side bearings. In the case of gap-type elastic side bearings, when the vehicle is running in a straight line, the upper and lower side bearings are usually not in contact, but there is a certain gap. Therefore, the disadvantage of the gap-type side bearing is that when a small side roll occurs, the critical speed of the vehicle body is low and the running stability is poor because the friction resistance torque cannot be suppressed. The existing constant-contact elastic side bearings have the following disadvantages: most elastic side bearings adopt a composite structure of rubber and metal, and the bonding strength between the rubber body, the elastomer and the metal component is low, which is prone to debonding and insufficient bonding strength. In addition, in the later use process, the bonding surface is prone to fatigue damage under the action of alternating loads.

[0003] During the use of side bearings, the rubber will creep. Due to the uneven creep, the upper wear plate cannot remain completely horizontal, and the upper wear plate cannot fully contact the car body, which reduces the rotational torque and increases the wear of the upper wear plate. At present, side bearings use a composite wear-resistant layer on a metal structure, but the wear-resistant layer is mainly made of PTFE (polytetrafluoroethylene). When the wear-resistant layer is bonded to the metal structure, the wear-resistant layer is difficult to bond, so surface adhesion treatment is required. However, a single adhesive cannot have good adhesion to both the metal surface and the wear-resistant layer-treated surface. Therefore, the lifespan of existing side bearings is relatively short, usually only 4-5 years, resulting in high use and maintenance costs, and is not conducive to environmental protection. In addition, the performance changes significantly during use, which will reduce the operating stability of rail vehicles and even create safety hazards. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of this application is to propose a wear-resistant layer, a side bearing comprising a wear-resistant layer, and a preparation method of the side bearing, wherein the wear-resistant layer is based on PTFE, and one or more of nano-silica, graphite, polyphenylene ester, polyimide, polyphenylene sulfide, polyetheretherketone, glass fiber, carbon fiber, etc. are added as fillers. After the PTFE matrix and the filler are evenly mixed, they are pressed into a cylindrical shape, sintered, and turned into a membrane of a certain thickness, and then surface activation treatment is performed to obtain the wear-resistant layer. The wear-resistant layer in this embodiment has high wear resistance. At the same time, the wear-resistant layer is treated chemically to solve the problem of surface adhesion, and the metal substrate is sandblasted to increase the adhesion area and the sliding resistance in the plane sliding direction. When the wear-resistant layer and the metal substrate are bonded, a primer with a relatively high affinity to both the metal substrate and the adhesive is first used, and then an adhesive with good adhesion to the treated surface of the wear-resistant layer is used. This solves the problem that a single adhesive cannot have good adhesion to both the surface of the metal substrate and the treated surface of the wear-resistant layer, increases the composite firmness of the wear-resistant layer and the metal substrate, extends the service life of the side bearing, and thus improves the operating stability of the rail vehicle.

[0006] To achieve the above-mentioned purpose, the present application proposes a wear-resistant layer, which, based on the wear-resistant layer, includes the following components in percentage by mass: PTFE is 84%-90%, and the rest is filler; wherein the filler includes at least one of nano-silica, graphite, polyphenylene ester, polyimide, polyphenylene sulfide, polyetheretherketone, glass fiber, nano-aluminum oxide or carbon fiber.

[0007] In some embodiments, based on the wear-resistant layer, the filler includes the following components in percentage by mass: 1.2%-2.5% nano-silicon dioxide, 1.5% graphite, 1.5% polyphenylene ester, 1.2% polyimide, 1.5% polyphenylene sulfide, 1.3%-2.8% polyetheretherketone, 1%-2.5% glass fiber, 1%-2% nano-aluminum oxide or 0.5%-0.8% carbon fiber.

[0008] In some embodiments, the wear-resistant layer is prepared by mixing the PTFE powder and the filler in a set ratio, pressing and molding, and then sintering at 300-350° C. for 18-24 hours; and turning the wear-resistant layer into a 1.5-2 mm thick membrane.

[0009] The second aspect of the present application proposes a side bearing, which includes the wear-resistant layer described in any of the above embodiments; and a metal substrate; wherein the metal substrate and the wear-resistant layer are compositely formed, and the wear-resistant layer is located on one side of the metal substrate.

[0010] In some embodiments, the side bearing further includes a binder layer and an adhesive layer, both of which are located between the metal substrate and the wear-resistant layer, wherein the binder layer is located between the metal substrate and the adhesive layer; and the adhesive layer is located between the binder layer and the wear-resistant layer.

[0011] The third aspect of the present application provides a method for preparing a side bearing, which comprises:

[0012] The metal substrate is subjected to a surface sandblasting treatment, and a binder is coated on one side thereof to form a binder layer, and the binder layer is dried;

[0013] Coating an adhesive on the dried binder layer to form an adhesive layer, and adhering the passivated wear-resistant layer to the undried adhesive layer, and curing at high temperature to form a preliminary shape;

[0014] After the preliminary forming, the side bearing is fine-processed, painted, and dried to obtain the side bearing.

[0015] In some embodiments, the bonding agent is an epoxy adhesive.

[0016] In some embodiments, the adhesive includes epoxy resin AB glue, all-purpose glue or welding glue.

[0017] In some embodiments, the wear-resistant layer passivation treatment method is to use a corrosive liquid to brush the adhesive surface of the wear-resistant layer for 5-10 minutes and then wipe it off to increase the adhesion of the adhesive surface of the wear-resistant layer.

[0018] In some embodiments, the etching solution is sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane or sodium naphthalene glycol dimethyl ether.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 This is a structural diagram of a side bearing proposed in one embodiment of the present application;

[0022] Figure 2 This is a structural diagram of a side bearing proposed in one embodiment of the present application;

[0023] Figure 3 This is a physical diagram of a side support proposed in one embodiment of the present application;

[0024] Figure 4 This is a flow chart of a method for preparing a side bearing proposed in one embodiment of the present application;

[0025] In the figure, 1. Metal substrate; 2. Binder layer; 3. Adhesive layer; 4. Wear-resistant layer. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain 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 variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0027] See also Figure 1 To achieve the above-mentioned purpose, the present application proposes a wear-resistant layer, which, based on the wear-resistant layer, includes the following components in percentage by mass: PTFE is 84%-90%, and the rest is filler; wherein the filler includes at least one of nano-silica, graphite, polyphenylene ester, polyimide, polyphenylene sulfide, polyetheretherketone, glass fiber, nano-aluminum oxide or carbon fiber.

[0028] Among them, taking the wear-resistant layer as the benchmark, the wear-resistant layer includes 84%-90% PTFE by mass, that is, the mass of PTFE is 84%-90% of the total mass of the wear-resistant layer, and further the mass of PTFE is 84%-86% of the total mass of the wear-resistant layer. For example, the mass of PTFE is 84%, 85%, 86%, 90% of the total mass of the wear-resistant layer or any value within the range. When the mass of PTFE is too low, such as lower than 84% of the total mass of the wear-resistant layer, it will reduce the wear resistance of the wear-resistant layer. When the mass of PTFE is too high, such as higher than 90% of the total mass of the wear-resistant layer, it will reduce the strength of the wear-resistant layer.

[0029] The filler in this embodiment includes at least one of nano-silicon dioxide, graphite, polyphenylene ester, polyimide, polyphenylene sulfide, polyetheretherketone, glass fiber, or carbon fiber. In some further embodiments, based on the wear-resistant layer, the filler includes the following components in percentage by weight: 1.2%-2.5% nano-silicon dioxide, 1.5% graphite, 1.5% polyphenylene ester, 1.2% polyimide, 1.5% polyphenylene sulfide, 1.3%-2.8% polyetheretherketone, 1%-2.5% glass fiber, 1%-2% nano-aluminum oxide, or 0.5%-0.8% carbon fiber.

[0030] It can be understood that the mass of nano-silica is 1.2%-2.5% of the total mass of the wear-resistant layer, for example, the mass of nano-silica is 1.2%, 2% and 2.5% of the total mass of the wear-resistant layer or any value within the range, wherein when the mass of nano-silica is too low, such as less than 1.2% of the total mass of the wear-resistant layer, it will reduce the wear resistance of the wear-resistant layer, and when the mass of nano-silica is too high, such as greater than 2.5% of the total mass of the wear-resistant layer, it will increase the preparation cost of the wear-resistant layer.

[0031] The mass of graphite is 1.5% of the total mass of the wear-resistant layer and is used to adjust the wear resistance coefficient of the wear-resistant layer. The mass of polyphenylene ester is 1.5% of the total mass of the wear-resistant layer and is used to adjust the self-lubrication of the wear-resistant layer. The mass of polyimide is 1.2% of the total mass of the wear-resistant layer and is used to adjust the wear resistance coefficient of the wear-resistant layer. The mass of polyphenylene sulfide is 1.5% of the total mass of the wear-resistant layer and is used to adjust the strength of the wear-resistant layer. The mass of polyetheretherketone is 1.3%-2.8% of the total mass of the wear-resistant layer, exemplified by 1.3%, 1.5%, 2%, 2.8%, or any value within the range, and is used to adjust the strength of the wear-resistant layer. The mass of glass fiber is 1%-2.5% of the total mass of the wear-resistant layer, exemplified by 1%, 1.5%, 2%, or 2.5%, or any value within the range, and is used to adjust 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, exemplified by 0.5%, 0.6%, 0.8% or any value within the range thereof, for adjusting the strength of the wear-resistant layer.

[0032] The wear-resistant layer is prepared by uniformly mixing PTFE powder and filler in a predetermined ratio, pressing and forming the mixture, and then sintering the mixture at 300-350°C for 18-24 hours to fix the mixture. The wear-resistant layer is then formed into a membrane sheet having a suitable thickness of 1.5-2 mm by lathing. For example, the PTFE powder and filler are uniformly mixed in a predetermined ratio, pressed and formed into a cylindrical shape, sintered, and then the wear-resistant layer is formed into a membrane sheet having a suitable thickness by lathing.

[0033] The second aspect of the present application proposes a side bearing, which includes the wear-resistant layer and a metal substrate in any of the above embodiments; wherein the metal substrate and the wear-resistant layer are compositely formed, and the wear-resistant layer is located on one side of the metal substrate.

[0034] Among them Figure 1 The metal substrate shown is a plate with a certain thickness, which includes an upper surface and a lower surface. The wear-resistant layer is attached to the upper surface of the metal substrate, and the metal substrate and the wear-resistant layer are compositely formed. The wear-resistant layer is located on one side of the metal substrate.

[0035] In some embodiments, the side bearing further includes a binder layer and an adhesive layer, both of which are located between the metal substrate and the wear-resistant layer, wherein the binder layer is located between the metal substrate and the adhesive layer; and the adhesive layer is located between the binder layer and the wear-resistant layer.

[0036] Among them, in some schemes, such as Figure 2 The side bearing shown also includes a binder layer and an adhesive layer, that is, a binder layer is attached to the upper surface of the metal substrate, and an adhesive layer is attached to the upper surface of the binder layer, and a wear-resistant layer is attached to the upper surface of the adhesive layer, so that the binder layer is located between the metal substrate and the adhesive layer; the adhesive layer is located between the binder layer and the wear-resistant layer. The binder is an epoxy adhesive, such as amine-cured epoxy glue and acid anhydride-cured glue. The binder is coated on the upper surface of the metal substrate and dried to obtain a binder layer; similarly, the adhesive is coated on the upper surface of the binder layer, and an adhesive layer is formed after the adhesive is cured. The adhesive includes epoxy resin AB glue, universal glue or welding glue. In addition, the actual picture of the side bearing is as follows Figure 3 shown.

[0037] The third aspect of the present application provides a method for preparing a side bearing, wherein the side bearing of any of the above embodiments is prepared as follows: Figure 4 Shown, including

[0038] S1: sandblasting the surface of the metal substrate, coating a binder on one side thereof to form a binder layer, and drying the binder layer;

[0039] S2: Coating adhesive on the dried binder layer to form an adhesive layer, and adhering the passivated wear-resistant layer to the undried adhesive layer, and curing at high temperature to form a preliminary shape;

[0040] S3: After finishing the initially formed side bearing, paint it and let it dry to obtain the side bearing.

[0041] Specifically, in S1, the metal substrate is sandblasted, and a binder is coated on one side thereof to form a binder layer, and the binder layer is dried; the binder is amine-cured epoxy adhesive, the binder is coated on the upper surface of the metal substrate, and dried to obtain the binder layer.

[0042] In S2, an adhesive is applied to the dried binder layer to form an adhesive layer. The adhesive may include epoxy resin AB glue, universal glue, or welding glue. The passivated wear-resistant layer is then adhered to the undried adhesive layer and cured at high temperature to form a preliminary shape. The wear-resistant layer is passivated by applying a corrosive solution to the adhesive surface of the wear-resistant layer for 5-10 minutes and then wiping it off to increase the adhesion of the wear-resistant layer. The corrosive solution may be sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane, or sodium naphthalene glycol dimethyl ether.

[0043] It can be seen that the reason why PTFE is difficult to bond is mainly due to the following reasons from the perspective of its physical properties:

[0044] (1) Low surface energy, the critical surface tension is generally only 1.85×10 -2N / m. PTFE has an advancing contact angle (θd) of 118°, a receding contact angle (θr) of 91°, and a contact angle (θ) of 104°, which are the largest of all materials. However, the larger the contact angle, the lower the degree of wettability, that is, the worse the wettability. The adhesive cannot fully wet the PTFE, and thus cannot adhere well to the PTFE.

[0045] (2) Due to its high crystallinity and good chemical stability, PTFE is more difficult to swell and dissolve than non-crystalline polymers. When the adhesive is applied to the PTFE surface, it is difficult for the polymer molecular chains to diffuse and entangle with each other, and strong adhesion cannot be formed.

[0046] (3) PTFE has a highly symmetrical structure and is a non-polar polymer. The adsorption of adhesives on the PTFE surface is caused by intermolecular forces, which include orientation forces, induction forces, and dispersion forces. However, the non-polar surface of PTFE does not have the conditions to form orientation forces and induction forces, and can only form weak dispersion forces, resulting in poor adhesion performance. Therefore, the solubility parameter SP value of PTFE is very small, and its adhesion to other substances is also very low.

[0047] The adhesion surface of the wear-resistant layer in the present embodiment is passivated by corrosive liquid, and corrosive liquid and PTFE plastic generation chemical reaction tear off the part fluorine atom on the material surface, so just left carbonized layer and some polar groups on the surface.Infrared spectrum shows, the surface introduces polar groups such as hydroxyl, carbonyl and unsaturated bond, and these groups can increase surface energy, and contact angle tapers, and wettability improves, and becomes sticky by being difficult to stick.Therefore wear-resistant layer adopts chemical process to handle and solve surface adhesion, and metal substrate adopts surface sandblasting to increase the slip resistance of adhesion area and plane sliding direction, when wear-resistant layer is glued to metal substrate, first adopt and all possess the adhesive of higher affinity with metal and adhesive, re-use and wear-resistant layer treatment surface possess the adhesive of better adhesion, solved like this simple a kind of adhesive can not all possess the difficult problem of better adhesion to metal surface and wear-resistant layer treatment surface simultaneously.

[0048] In S3, the side bearing after preliminary forming is finely processed and then painted, and then dried to obtain the side bearing.

[0049] Example 1

[0050] The wear-resistant layer comprises the following components by weight: 90.00% PTFE, 1.20% polyimide, 1.20% nano-silica, 1.50% polyphenylene sulfide, 1.50% graphite, 1.30% polyetheretherketone, 1.50% polyphenylene ester, 1.00% glass fiber, and 0.80% carbon fiber. The PTFE powder and filler are mixed in a predetermined ratio and pressed into a mold. The mold is then sintered at 300°C for 20 hours. The wear-resistant layer is then turned into a 1.5mm thick diaphragm.

[0051] The metal substrate is sandblasted and coated on one side with a binder to form a binder layer, which is then dried. The binder is an anhydride-cured adhesive, which is applied to the upper surface of the metal substrate and dried to form a binder layer. An adhesive is applied to the dried binder layer to form an adhesive layer, which is a welding adhesive. The passivated wear-resistant layer is then adhered to the undried adhesive layer and cured at high temperature to form a preliminary shape. The wear-resistant layer is passivated by applying a corrosive liquid to the adhesive surface of the wear-resistant layer for 5 minutes and then wiping it off to increase the adhesion of the adhesive surface of the wear-resistant layer. The corrosive liquid is sodium naphthalene tetrahydrofuran. The initially formed side bearing is then fine-finished, painted, and dried to form the side bearing.

[0052] Example 2

[0053] The wear-resistant layer comprises the following components by weight: 87.20% PTFE, 1.20% polyimide, 2.00% nano-silica, 1.50% polyphenylene sulfide, 1.50% graphite, 1.50% polyetheretherketone, 1.50% polyphenylene ester, 1.00% nano-aluminum oxide, 0.80% carbon fiber, and 1.80% glass fiber. PTFE powder and filler are mixed uniformly in a predetermined ratio and pressed into a mold, then sintered at 350°C for 18 hours to form a fixed layer. The wear-resistant layer is then formed into a 2mm thick diaphragm by lathing. A metal substrate is sandblasted and coated on one side with a binder to form a binder layer, which is then air-dried. The binder is an anhydride-cured adhesive, applied to the upper surface of the metal substrate, and air-dried to form the binder layer. An adhesive layer (universal glue) is applied to the dried binder layer to form an adhesive layer. The passivated wear-resistant layer is then adhered to the undried adhesive layer and cured at high temperature to form a preliminary shape. The wear-resistant layer is passivated by applying a corrosive solution (sodium biphenyl dioxane) to the adhesive surface of the wear-resistant layer for 10 minutes and then wiping it off to increase the adhesion of the wear-resistant surface. The initially formed side bearing is then fine-finished, painted, and dried to complete the side bearing.

[0054] Example 3

[0055] The wear-resistant layer, based on the wear-resistant layer, comprises the following components by weight: 85.00% PTFE, 1.20% polyimide, 2.50% nano-silica, 1.50% polyphenylene sulfide, 1.50% graphite, 1.50% polyetheretherketone, 1.50% polyphenylene ester, 2.00% nano-aluminum oxide, 0.50% carbon fiber, and 2.80% glass fiber. The PTFE powder and filler are mixed in a predetermined ratio and pressed into a mold. The mold is then sintered at 320°C for 24 hours to set the mold. The wear-resistant layer is then turned into a 1.8mm thick diaphragm.

[0056] The metal substrate is sandblasted and coated on one side with a binder to form a binder layer, which is then dried. The binder is an anhydride-cured adhesive, which is applied to the upper surface of the metal substrate and dried to form a binder layer. An adhesive is applied to the dried binder layer to form an adhesive layer, which is an epoxy resin AB adhesive. The passivated wear-resistant layer is then adhered to the undried adhesive layer and cured at high temperature to form a preliminary shape. The wear-resistant layer is passivated by applying a corrosive liquid to the adhesive surface of the wear-resistant layer for 8 minutes and then wiping it off to increase the adhesion of the adhesive surface of the wear-resistant layer. The corrosive liquid is sodium naphthalene glycol dimethyl ether. The initially formed side bearing is then fine-finished, painted, and dried to form the side bearing.

[0057] Comparative Example 1

[0058] The wear-resistant layer passivation treatment method is surface burning method, and other technical features are the same as those in Example 1. The side bearing bonding strength is insufficient and easy to fall off.

[0059] Comparative Example 2

[0060] The passivation treatment method of the wear-resistant layer is a strong acid and strong alkali corrosion method, and other technical features are the same as those of Example 1. The side bearing bonding strength is insufficient and is easy to fall off.

[0061] It should be noted that, in the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0062] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are 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 embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in at least one embodiment or example.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A side bearing, characterized in that: The invention comprises a wear-resistant layer and a metal substrate; wherein the metal substrate and the wear-resistant layer are compositely formed, and the wear-resistant layer is located on one side of the metal substrate; a binder is coated on one side of the metal substrate to form a binder layer; the binder is an epoxy adhesive; based on the wear-resistant layer, the wear-resistant layer comprises the following components in percentage by weight: PTFE is 84%-90%, and the remainder is a filler; wherein, based on the wear-resistant layer, the filler comprises the following components in percentage by weight: nano-silicon dioxide is 1.2%-2. 5%, graphite 1.5%, polyphenylene ester 1.5%, polyimide 1.2%, polyphenylene sulfide 1.5%, polyetheretherketone 1.3%-2.8%, glass fiber 1%-2.5%, nano-aluminum oxide 1%-2% and carbon fiber 0.5%-0.8%; the preparation method of the wear-resistant layer is: the PTFE powder and the filler are uniformly mixed according to a set ratio and pressed into shape, and then sintered at 300-350° C. for 18-24 hours; and the wear-resistant layer is made into a diaphragm with a thickness of 1.5-2 mm by turning; The side bearing further comprises an adhesive layer, wherein the bonding agent layer and the adhesive layer are both located between the metal substrate and the wear-resistant layer, wherein the bonding agent layer is located between the metal substrate and the adhesive layer; and the adhesive layer is located between the bonding agent layer and the wear-resistant layer; The preparation method of the side bearing includes: The metal substrate is subjected to a surface sandblasting treatment, and a binder is coated on one side thereof to form a binder layer, and the binder layer is dried; An adhesive is applied to the dried binder layer to form an adhesive layer, and the passivated wear-resistant layer is adhered to the undried adhesive layer and heated and cured to form a preliminary shape; the adhesive comprises epoxy resin AB glue or multi-purpose glue; the passivation treatment method of the wear-resistant layer comprises applying a corrosive liquid to the adhesive surface of the wear-resistant layer for 5-10 minutes and then wiping it off; the corrosive liquid is sodium naphthalene tetrahydrofuran, sodium biphenyl dioxane or sodium naphthalene glycol dimethyl ether; After the preliminary forming, the side bearing is fine-processed, painted, and dried to obtain the side bearing.

Images