Copper-based wear-resistant clutch friction plate and preparation process thereof

Abstract

The invention discloses a copper-based wear-resistant clutch friction plate and a preparation process thereof, and the copper-based wear-resistant clutch friction plate is obtained by mixing a powder material and a binder according to a mass ratio of (12-14): 1 and then carrying out hot press molding, by adding a proper amount of composite carbon nanotubes into the material of the clutch friction plate, the composite carbon nanotubes can be uniformly dispersed and firmly combined into a matrix of the material of the clutch friction plate, so that the wear resistance of the clutch friction plate is greatly improved; according to the clutch friction plate prepared through the method, when a clutch works, the friction plate and a dual face move relatively, a continuous lubricating film can be gradually separated out and formed on a contact interface, the friction coefficient can be greatly reduced through the lubricating film, friction heat can be reduced, the friction surface is greatly protected, and the service life of the clutch is prolonged. The surface abrasion is reduced, the service life is prolonged, and the transmission stability and reliability of the clutch can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of friction plates, in particular to a copper-based wear-resistant clutch friction plate and a preparation process thereof. Background Art

[0002] In the complex mechanical structure of a car, the clutch plays a vital role as a bridge connecting the engine and the transmission. The clutch friction plate is one of the most core and most easily worn components in this system, and is directly related to the working state of the entire clutch.

[0003] Clutch friction plates are usually made of high-strength, high-wear-resistant materials to ensure a stable friction coefficient and good wear resistance during high-speed rotation and frequent engagement and disengagement.

[0004] The working principle of the clutch is as follows: when the driver steps on the clutch pedal, a series of mechanical transmission devices are used to reduce or even completely release the pressure between the clutch pressure plate and the flywheel, so that the clutch friction plate, the flywheel and the pressure plate slide relative to each other, thus cutting off the power. On the contrary, when the driver releases the clutch pedal, the clutch pressure plate presses the friction plate under the action of the spring, making it fit tightly with the flywheel, thus restoring the power transmission. In this process, the clutch friction plate plays a key role. It not only has to withstand the strong torque from the engine, but also maintains good friction performance and wear resistance during frequent engagement and separation. Therefore, the material and design of the friction plate are crucial to the overall performance and life of the clutch.

[0005] However, the wear resistance of the clutch friction plate prepared by the prior art is relatively general, resulting in a significant limitation on its service life.

[0006] Therefore, the present invention solves the corresponding problems by providing a copper-based wear-resistant clutch friction plate. Summary of the invention

[0007] The purpose of the present invention is to provide a copper-based wear-resistant clutch friction plate to solve the deficiencies in the prior art.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A copper-based wear-resistant clutch friction plate is obtained by mixing a powder material and a binder in a mass ratio of 12-14:1 and then hot pressing;

[0010] The powder material comprises the following components by weight percentage: 1.2-1.5% iron powder, 0.3-0.6% manganese powder, 2-4% silicon dioxide powder, 0.1-0.3% molybdenum disulfide powder, 2-4% composite carbon nanotubes, 0.3-0.5% zirconium silicate, and the rest is copper powder.

[0011] As a further technical solution: the method for preparing the composite carbon nanotubes is:

[0012] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0013] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0014] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0015] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0016] The heating rate was 10 °C / min;

[0017] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0018] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0019] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0020] The heating rate was 5 °C / min;

[0021] As a further technical solution: the mass ratio of the carbon nanotubes to potassium hydroxide is 1:3-4;

[0022] The mass ratio of mixture to water is 1:10.

[0023] As a further technical solution: the inert atmosphere is a nitrogen atmosphere.

[0024] As a further technical solution: the mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0025] The mass fraction of the aluminum nitrate is 5%;

[0026] The mass fraction of the cerium nitrate is 0.2%.

[0027] As a further technical solution: the mixing ratio of the pretreated carbon nanotubes and the composite treatment liquid is 30-35g:200mL.

[0028] As a further technical solution: the binder is a mixture of butyl rubber and phenolic resin;

[0029] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0030] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0031] (1) Material preparation: prepare powder material and binder separately;

[0032] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0033] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0034] (4) Injection molding: Inject the mixed material into a preheated mold;

[0035] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding and passing inspection, the product is obtained.

[0036] As a further technical solution: the preheated mold is:

[0037] Preheat the mold to 158°C for 10 minutes.

[0038] As a further technical solution: the hot pressing pressure is 35-38 MPa and the temperature is 372-380°C.

[0039] Beneficial effects:

[0040] The present invention adds a proper amount of composite carbon nanotubes to the material of the clutch friction plate, which can be evenly dispersed and firmly combined in the clutch friction plate material matrix, thereby greatly improving the wear resistance of the clutch friction plate; when the clutch is working, the clutch friction plate prepared by the present invention has relative motion between the friction plate and the dual surface, and a continuous lubricating film can be gradually precipitated and formed on the contact interface, and this lubricating film can greatly reduce the friction coefficient and the generation of friction heat, thereby greatly protecting the friction surface, reducing surface wear, extending the service life, and ensuring the stability and reliability of the clutch transmission.

[0041] The clutch friction plate prepared by the present invention not only has greatly enhanced wear resistance, but also has significantly extended service life, which is extended by more than 40% compared with the case without adding composite carbon nanotubes; moreover, its transmission efficiency is significantly optimized, noise is greatly reduced, driving comfort is improved, and, in a high temperature environment, a low friction coefficient can be maintained, which helps to prevent the problem of friction plate failure caused by overheating.

[0042] The clutch generates a large amount of heat during operation, especially under high-speed and high-load conditions. The present invention makes reasonable proportions of its components so that the manufactured clutch friction plate has excellent high-temperature stability and oxidation resistance, can maintain stable physical and chemical properties under high-temperature environment, and can effectively prevent material softening and failure caused by high temperature.

[0043] The reasonable proportions of the components of the present invention and their combined use have significant advantages in improving the wear resistance of the clutch friction plate. The comprehensive performance and service life of the clutch friction plate can be improved by enhancing the surface hardness and wear resistance, improving the stability of the friction coefficient, improving the thermal stability and oxidation resistance, and optimizing the wear mechanism. The stability of power transmission during vehicle driving can be effectively guaranteed; the clutch life can be extended; driving comfort can be improved; and driving safety can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The present invention is a flow chart of a copper-based wear-resistant clutch friction plate. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The following are specific embodiments

[0047] Example 1

[0048] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0049] (1) Material preparation: Prepare powder material and binder separately:

[0050] The powder material and the binder are prepared in a mass ratio of 12:1;

[0051] The powder material comprises the following components by weight percentage: 1.2% iron powder, 0.3% manganese powder, 2% silicon dioxide powder, 0.1% molybdenum disulfide powder, 2% composite carbon nanotubes, 0.3% zirconium silicate, and the rest is copper powder.

[0052] The preparation method of composite carbon nanotubes is as follows:

[0053] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0054] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0055] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0056] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0057] The heating rate was 10 °C / min;

[0058] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0059] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0060] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0061] The heating rate was 5 °C / min;

[0062] The mass ratio of carbon nanotubes to potassium hydroxide is 1:3;

[0063] The mass ratio of mixture to water is 1:10.

[0064] The inert atmosphere was a nitrogen atmosphere.

[0065] The mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0066] The mass fraction of aluminum nitrate is 5%;

[0067] The mass fraction of the cerium nitrate is 0.2%.

[0068] The mixing ratio of the pretreated carbon nanotubes and the composite treatment solution is 30 g:200 mL.

[0069] The adhesive is a mixture of butyl rubber and phenolic resin;

[0070] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0071] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0072] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0073] (4) Injection molding: Inject the mixed material into a preheated mold; the preheated mold is:

[0074] Preheat the mold to 158°C for 10 minutes.

[0075] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding, and inspection, the product is obtained. The hot pressing pressure is 36MPa and the temperature is 375℃.

[0076] Example 2

[0077] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0078] (1) Material preparation: Prepare powder material and binder separately:

[0079] The powder material and the binder are prepared in a mass ratio of 13:1;

[0080] The powder material comprises the following components by weight percentage: 1.3% iron powder, 0.4% manganese powder, 2.5% silicon dioxide powder, 0.2% molybdenum disulfide powder, 2.5% composite carbon nanotubes, 0.35% zirconium silicate, and the rest is copper powder.

[0081] The preparation method of composite carbon nanotubes is as follows:

[0082] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0083] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0084] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0085] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0086] The heating rate was 10 °C / min;

[0087] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0088] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0089] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0090] The heating rate was 5 °C / min;

[0091] The mass ratio of carbon nanotubes to potassium hydroxide is 1:3.5;

[0092] The mass ratio of mixture to water is 1:10.

[0093] The inert atmosphere was a nitrogen atmosphere.

[0094] The mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0095] The mass fraction of the aluminum nitrate is 5%;

[0096] The mass fraction of the cerium nitrate is 0.2%.

[0097] The mixing ratio of the pretreated carbon nanotubes and the composite treatment solution is 32 g:200 mL.

[0098] The adhesive is a mixture of butyl rubber and phenolic resin;

[0099] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0100] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0101] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0102] (4) Injection molding: Inject the mixed material into a preheated mold; the preheated mold is:

[0103] Preheat the mold to 158°C for 10 minutes.

[0104] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding, and inspection, the product is obtained. The hot pressing pressure is 36MPa and the temperature is 375℃.

[0105] Example 3

[0106] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0107] (1) Material preparation: Prepare powder material and binder separately:

[0108] The powder material and the binder are prepared in a mass ratio of 12:1;

[0109] The powder material comprises the following components by weight percentage: 1.4% iron powder, 0.4% manganese powder, 3% silicon dioxide powder, 0.2% molybdenum disulfide powder, 3% composite carbon nanotubes, 0.4% zirconium silicate, and the rest is copper powder.

[0110] The preparation method of composite carbon nanotubes is as follows:

[0111] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0112] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0113] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0114] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0115] The heating rate was 10 °C / min;

[0116] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0117] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0118] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0119] The heating rate was 5 °C / min;

[0120] The mass ratio of carbon nanotubes to potassium hydroxide is 1:3.2;

[0121] The mass ratio of mixture to water is 1:10.

[0122] The inert atmosphere was a nitrogen atmosphere.

[0123] The mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0124] The mass fraction of aluminum nitrate is 5%;

[0125] The mass fraction of the cerium nitrate is 0.2%.

[0126] The mixing ratio of the pretreated carbon nanotubes and the composite treatment liquid is 33 g:200 mL.

[0127] The adhesive is a mixture of butyl rubber and phenolic resin;

[0128] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0129] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0130] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0131] (4) Injection molding: Inject the mixed material into a preheated mold; the preheated mold is:

[0132] Preheat the mold to 158°C for 10 minutes.

[0133] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding, and inspection, the product is obtained. The hot pressing pressure is 36MPa and the temperature is 375℃.

[0134] Example 4

[0135] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0136] (1) Material preparation: Prepare powder material and binder separately:

[0137] The powder material and the binder are prepared in a mass ratio of 13.5:1;

[0138] The powder material comprises the following components by weight percentage: 1.3% iron powder, 0.5% manganese powder, 3.5% silicon dioxide powder, 0.25% molybdenum disulfide powder, 3.5% composite carbon nanotubes, 0.45% zirconium silicate, and the rest is copper powder.

[0139] The preparation method of composite carbon nanotubes is as follows:

[0140] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0141] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0142] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0143] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0144] The heating rate was 10 °C / min;

[0145] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0146] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0147] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0148] The heating rate was 5 °C / min;

[0149] The mass ratio of carbon nanotubes to potassium hydroxide is 1:3.6;

[0150] The mass ratio of mixture to water is 1:10.

[0151] The inert atmosphere was a nitrogen atmosphere.

[0152] The mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0153] The mass fraction of aluminum nitrate is 5%;

[0154] The mass fraction of the cerium nitrate is 0.2%.

[0155] The mixing ratio of the pretreated carbon nanotubes and the composite treatment solution is 32 g:200 mL.

[0156] The adhesive is a mixture of butyl rubber and phenolic resin;

[0157] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0158] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0159] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0160] (4) Injection molding: Inject the mixed material into a preheated mold; the preheated mold is:

[0161] Preheat the mold to 158°C for 10 minutes.

[0162] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding, and inspection, the product is obtained. The hot pressing pressure is 36MPa and the temperature is 375℃.

[0163] Example 5

[0164] A method for preparing a copper-based wear-resistant clutch friction plate comprises the following steps:

[0165] (1) Material preparation: Prepare powder material and binder separately:

[0166] The powder material and the binder are prepared in a mass ratio of 14:1;

[0167] The powder material comprises the following components by weight percentage: 1.5% iron powder, 0.6% manganese powder, 4% silicon dioxide powder, 0.3% molybdenum disulfide powder, 4% composite carbon nanotubes, 0.5% zirconium silicate, and the rest is copper powder.

[0168] The preparation method of composite carbon nanotubes is as follows:

[0169] First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture;

[0170] Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours;

[0171] The crucible was placed at 110°C, kept warm, and allowed to stand for 12 hours for continuous evaporation treatment;

[0172] After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes;

[0173] The heating rate was 10 °C / min;

[0174] Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution;

[0175] The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material;

[0176] The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes.

[0177] The heating rate was 5 °C / min;

[0178] The mass ratio of carbon nanotubes to potassium hydroxide is 1:4;

[0179] The mass ratio of mixture to water is 1:10.

[0180] The inert atmosphere was a nitrogen atmosphere.

[0181] The mass fraction of nickel nitrate in the composite treatment solution is 1%;

[0182] The mass fraction of aluminum nitrate is 5%;

[0183] The mass fraction of the cerium nitrate is 0.2%.

[0184] The mixing ratio of the pretreated carbon nanotubes and the composite treatment solution is 35 g:200 mL.

[0185] The adhesive is a mixture of butyl rubber and phenolic resin;

[0186] Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:5.

[0187] (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder;

[0188] (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material;

[0189] (4) Injection molding: Inject the mixed material into a preheated mold; the preheated mold is:

[0190] Preheat the mold to 158°C for 10 minutes.

[0191] (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding, and inspection, the product is obtained. The hot pressing pressure is 38MPa and the temperature is 380℃.

[0192] Comparative Example 1:

[0193] Based on the technical solution of Example 1, no composite carbon nanotubes are added, and the rest of the technical solutions remain unchanged.

[0194] Comparative Example 2:

[0195] On the basis of the technical solution of Example 1, the composite carbon nanotubes are replaced with untreated carbon nanotubes, and the rest of the technical solutions remain unchanged.

[0196] test:

[0197] The performance tests were conducted on the samples (3750 mm×1650 mm×2420 mm) of the embodiment and the comparative example. The friction coefficients of the samples were tested at a rotation speed of 900 rpm and a temperature of 600° C. The test results are shown in Table 1:

[0198] Table 1

[0199] Friction coefficient Example 1 0.50 Example 2 0.51 Example 3 0.51 Example 4 0.53 Example 5 0.52 Comparative Example 1 0.73 Comparative Example 2 0.60

[0200] It can be seen from Table 1 that the clutch friction plate prepared by the present invention has a lower friction coefficient and good wear resistance.

[0201] Based on the sample in Example 3, the friction coefficient at different temperatures was tested:

[0202] Table 2

[0203]

[0204]

[0205] It can be seen from Table 2 that the friction coefficient of the clutch friction plate prepared by the present invention gradually decreases with increasing temperature and finally tends to be stable.

[0206] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A copper-based wear-resistant clutch friction plate, characterized in that: The powder material and the binder are mixed in a mass ratio of 12-14:1 and then hot-pressed to obtain the mixture. The powder material comprises the following components by weight percentage: 1.2-1.5% iron powder, 0.3-0.6% manganese powder, 2-4% silicon dioxide powder, 0.1-0.3% molybdenum disulfide powder, 2-4% composite carbon nanotubes, 0.3-0.5% zirconium silicate, and the rest is copper powder.

2. The copper-based wear-resistant clutch friction plate according to claim 1, characterized in that: The composite carbon nanotube preparation method is as follows: First, the carbon nanotubes and potassium hydroxide powder are mixed together to obtain a mixture; Add the obtained mixture into a crucible, add water, stir and mix evenly, adjust the temperature to 65°C, and keep stirring for 4 hours; Place the crucible at 110°C, keep warm, and let it stand for 12 hours for continuous evaporation treatment; After the water in the crucible is completely evaporated, it is heated to 680°C under the protection of an inert atmosphere, kept warm for 2 hours, and then cooled to room temperature, washed to the center with water, and dried to obtain pretreated carbon nanotubes; The heating rate was 10 °C / min; Adding nickel nitrate, aluminum nitrate and cerium nitrate to water in sequence to prepare a composite treatment solution; The pretreated carbon nanotubes and the composite treatment solution were mixed together, the temperature was adjusted to 80°C, the mixture was stirred for 4 hours, ultrasonically dispersed for 10 minutes, and then dried by rotary evaporation to obtain a solid composite material; The solid composite material is placed in a crucible again, heated to 550° C., kept at this temperature for 4 hours, then cooled to room temperature, and ground to obtain composite carbon nanotubes. The heating rate was 5°C / min.

3. The copper-based wear-resistant clutch friction plate according to claim 2, characterized in that: The mass ratio of the carbon nanotubes to potassium hydroxide is 1:3-4; The mass ratio of mixture to water is 1:

10.

4. The copper-based wear-resistant clutch friction plate according to claim 2, characterized in that: The inert atmosphere is a nitrogen atmosphere.

5. The copper-based wear-resistant clutch friction plate according to claim 2, characterized in that: The mass fraction of nickel nitrate in the composite treatment solution is 1%; The mass fraction of the aluminum nitrate is 5%; The mass fraction of the cerium nitrate is 0.2%.

6. The copper-based wear-resistant clutch friction plate according to claim 2, characterized in that: The mixing ratio of the pretreated carbon nanotubes and the composite treatment liquid is 30-35 g: 200 mL.

7. The copper-based wear-resistant clutch friction plate according to claim 1, characterized in that: The adhesive is a mixture of butyl rubber and phenolic resin; Among them, the mixing mass ratio of butyl rubber and phenolic resin is 1:

5.

8. The method for preparing a copper-based wear-resistant clutch friction plate according to claim 1, characterized in that: The following steps are involved: (1) Material preparation: prepare powder material and binder separately; (2) Melting: Add the binder into a melting furnace and heat it to 450°C to melt it to obtain a liquid binder; (3) Mixing: Add powder materials into the melting furnace, reduce the temperature to 420°C, keep warm and stir for 10 minutes to obtain a mixed material; (4) Injection molding: Inject the mixed material into a preheated mold; (5) Hot pressing: After hot pressing treatment, cooling, demoulding, surface grinding and passing inspection, the product is ready.

9. The method for preparing a copper-based wear-resistant clutch friction plate according to claim 8, characterized in that: The preheated mold is: Preheat the mold to 158°C for 10 minutes.

10. The method for preparing a copper-based wear-resistant clutch friction plate according to claim 1, characterized in that: The hot pressing pressure is 35-38 MPa and the temperature is 372-380°C.

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