CN114876989A - Aluminum-based brake friction plate and preparation method thereof - Google Patents

Aluminum-based brake friction plate and preparation method thereof Download PDF

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Publication number
CN114876989A
CN114876989A CN202210510101.8A CN202210510101A CN114876989A CN 114876989 A CN114876989 A CN 114876989A CN 202210510101 A CN202210510101 A CN 202210510101A CN 114876989 A CN114876989 A CN 114876989A
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aluminum
friction plate
sintering
parts
powder
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CN114876989B (en
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何嘉哲
滕海瑞
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Jiangsu Chuanzhao Mingtun Electrical Machinery Co ltd
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Jiangsu Chuanzhao Mingtun Electrical Machinery Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F16D69/027—Compositions based on metals or inorganic oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0008—Ferro
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0026—Non-ferro
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0026—Non-ferro
    • F16D2200/003—Light metals, e.g. aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0082—Production methods therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention belongs to the technical field of preparation of friction plates of aluminum-core brakes, and discloses an aluminum-based brake friction plate and a preparation method thereof. According to the invention, the aluminum-based friction plate is obtained by optimizing the components of the aluminum matrix and the friction material, a large amount of reinforcing materials such as resin and fiber are not required to be added, the raw materials used in the invention are simple and easy to obtain, and the finally obtained friction plate has excellent wear resistance, durability and strength; the invention also provides a preparation method of the aluminum-based brake friction plate. The aluminum matrix and the friction material are integrally formed through a special sintering and hot press forming process. The friction plate does not need to be provided with a bonding layer, so that the environment is protected, the preparation process is simplified, and the bonding strength between the friction material and the aluminum substrate in the friction plate is high, so that the friction plate is suitable for large-scale popularization and application.

Description

Aluminum-based brake friction plate and preparation method thereof
Technical Field
The invention relates to the technical field of preparation of friction plates of aluminum-core brakes, in particular to an aluminum-based brake friction plate and a preparation method thereof.
Background
The friction plate is an assembly consisting of a chip and a friction lining or a friction material layer, and is widely applied to the fields of mechanical engineering, mechanical parts and brakes. The existing friction plates are made of various materials, but the friction plates made of different materials have different problems when being applied. For example, for a copper-based friction plate, in order to ensure that a copper matrix and a friction layer are firmly bonded, pressurization is required in the sintering process, the pressure is generally 1.0-2.0 MPa, the pressurization is required in a bell jar furnace, the pressurization process is complex, the heating process of a product is not uniform, and the performance is easy to change; for a steel-based friction plate, the steel core structure is arranged, and the steel core is easy to generate magnetism after long-time friction, so that the service life of the friction plate can be influenced under the action of the magnetism. Therefore, the aluminum-based friction plate becomes the research focus of the conventional brake friction plate.
However, the conventional aluminum-based brake friction plate needs to be provided with a bonding layer between the substrate and the friction material during the preparation process to improve the bonding strength between the aluminum substrate and the friction material, wherein the bonding layer is usually made of glue, and the bonding manner is such that the bonding strength between the aluminum substrate and the friction material is low, which may affect the subsequent processing procedure and application. Meanwhile, a plurality of reinforcing materials such as resin and fiber are required to be added into the friction material of the conventional aluminum-based brake friction plate, and the uniformity of the distribution of the reinforcing materials such as resin and fiber has a great influence on the performance of the friction plate, so that the uniformity of material mixing and a subsequent hot pressing process are strictly controlled during the synthesis of the conventional aluminum-based friction plate, and the conventional aluminum-based brake friction plate formed by integral hot pressing can be put into use only by secondary processing, and the preparation process is complex. Therefore, research on an aluminum-based brake friction plate which is simple in preparation process and high in bonding strength between a substrate and a friction material is urgently needed in the field.
Disclosure of Invention
In view of the above, the invention provides an aluminum-based brake friction plate and a preparation method thereof, and solves the problems that the existing aluminum-based brake friction plate needs to be provided with a bonding layer, and needs to be added with a large amount of reinforcing materials such as resin and fiber, and the complexity of the preparation process is greatly increased.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an aluminum-based brake friction plate, which consists of a friction material and an aluminum substrate;
the aluminum matrix comprises the following raw materials in percentage by mass: 30-50 parts of aluminum alloy powder, 0.9-1.3 parts of tungsten carbide and 0.1-0.3 part of titanium diboride powder;
the friction material comprises the following raw materials in parts by mass: 70-100 parts of copper powder, 25-30 parts of iron powder, 10-15 parts of silicon dioxide, 35-50 parts of rubber powder, 10-15 parts of an antiwear agent and 20-25 parts of a filler;
the mass ratio of the aluminum matrix to the friction material is 31-51.6: 170-235.
Preferably, the aluminum substrate is an aluminum substrate with penetrating holes uniformly arranged on the periphery; the diameter of the penetrating hole is 0.3-1.2 cm.
Preferably, the antiwear agent comprises aluminum powder and zinc powder, and the mass ratio of the aluminum powder to the zinc powder is 1-4: 1-3.5; the filler comprises graphene, light magnesium oxide, precipitated barium sulfate and mica, and the mass ratio of the graphene to the light magnesium oxide to the precipitated barium sulfate to the mica is 15-20: 5-8: 10-15: 3-7.
The invention also provides a preparation method of the friction plate of the aluminum-based brake, which comprises the following steps:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler to obtain a friction material mixture;
(2) hot-press molding: carrying out hot press molding on the pre-pressed aluminum substrate and the friction material mixture to obtain a friction sheet blank;
(3) and (3) heat treatment: and sintering the friction plate blank to obtain the aluminum-based brake friction plate.
Preferably, in the step (1), the mixing temperature is 20-30 ℃, and the mixing time is 1-3 min.
Preferably, in the step (2), the pressure of the hot press molding is 600 to 650kg/cm 2 The hot-press forming temperature is 160-180 ℃, and the hot-press forming time is 5-7 min.
Preferably, in the step (2), the preparation of the pre-pressed aluminum substrate comprises the following steps:
mixing the aluminum alloy powder, the tungsten carbide and the titanium diboride powder, and then sequentially carrying out heat treatment and hot pressing treatment to obtain a pre-pressed aluminum substrate;
the temperature of the heat treatment is 800-900 ℃, and the time is 10-15 min;
the temperature of the hot-pressing treatment is 800-900 ℃, and the pressure is 500-550 kg/cm 2 The time is 40-50 s.
Preferably, in the step (3), the sintering includes a first stage sintering, a second stage sintering and a third stage sintering;
the sintering temperature of the first stage sintering is 400-500 ℃; the sintering temperature of the second stage of sintering is 600-800 ℃; the sintering temperature of the third-stage sintering is 900-1000 ℃;
the sintering time of the first stage sintering, the second stage sintering and the third stage sintering is independently 20-30 min.
Preferably, the heating rate of heating to the sintering temperature in the first stage of sintering is 2-3 ℃/min; in the second stage of sintering, the heating rate of heating to the sintering temperature is 4-5 ℃/min; in the third stage of sintering, the heating rate of heating to the sintering temperature is 2-3 ℃/min.
Preferably, in the step (3), the sintered friction plate blank is cooled to room temperature along with a furnace to obtain the aluminum-based brake friction plate.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the friction plate of the aluminum-based brake is obtained by optimizing the raw materials used by the friction material and improving the synthetic raw materials and the structure of the aluminum matrix, a large amount of reinforcing materials such as resin and fiber are not required to be added, the raw materials used by the friction plate are simple and easy to obtain, and the finally obtained friction plate is excellent in wear resistance, durability and strength;
the friction plate does not need to be provided with a bonding layer, so that the environment is protected, the preparation process is simplified, and the bonding strength between the friction material and the aluminum substrate in the friction plate is high.
Detailed Description
The invention provides an aluminum-based brake friction plate, which consists of a friction material and an aluminum substrate;
the aluminum matrix comprises the following raw materials in percentage by mass: 30-50 parts of aluminum alloy powder, 0.9-1.3 parts of tungsten carbide and 0.1-0.3 part of titanium diboride powder;
the friction material comprises the following raw materials in parts by mass: 70-100 parts of copper powder, 25-30 parts of iron powder, 10-15 parts of silicon dioxide, 35-50 parts of rubber powder, 10-15 parts of an antiwear agent and 20-25 parts of a filler;
the mass ratio of the aluminum matrix to the friction material is 31-51.6: 170-235.
In the present invention, the amount of the aluminum alloy powder in the aluminum matrix is preferably 35 to 45 parts, and more preferably 38 to 40 parts; the dosage of the tungsten carbide in the aluminum matrix is preferably 1 to 1.2 parts, and more preferably 1.05 to 1.15 parts; the amount of titanium diboride powder in the aluminum matrix is preferably 0.15 to 0.25 part, and more preferably 0.18 to 0.2 part.
In the invention, the using amount of the copper powder in the friction material is preferably 80-90 parts, and more preferably 85-88 parts; the using amount of the iron powder in the friction material is preferably 26-28 parts, and more preferably 27 parts; the using amount of the silicon dioxide in the friction material is preferably 11-14 parts, and more preferably 12-13 parts; the using amount of the rubber powder in the friction material is preferably 38-45 parts, and more preferably 40-42 parts; the dosage of the anti-abrasion agent in the friction material is preferably 11-14 parts, and more preferably 12-13 parts; the amount of the filler in the friction material is preferably 21-24 parts, and more preferably 22-23 parts.
In the invention, the aluminum matrix is the aluminum matrix with penetrating holes uniformly arranged on the periphery; the diameter of the penetrating hole is preferably 0.3-1.2 cm, and more preferably 0.9-1 cm.
In the invention, the antiwear agent comprises aluminum powder and zinc powder, and the mass ratio of the aluminum powder to the zinc powder is preferably 1-4: 1-3.5, and more preferably 2-3: 2-2.5; the filler comprises graphene, light magnesium oxide, precipitated barium sulfate and mica, and the mass ratio of the graphene to the light magnesium oxide to the precipitated barium sulfate to the mica is preferably 15-20: 5-8: 10-15: 3-7, and more preferably 16-17: 7-7.5: 11-13: 5-6.
The invention also provides a preparation method of the friction plate of the aluminum-based brake, which comprises the following steps:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler to obtain a friction material mixture;
(2) hot-press molding: carrying out hot press molding on the pre-pressed aluminum substrate and the friction material mixture to obtain a friction sheet blank;
(3) and (3) heat treatment: and sintering the friction plate blank to obtain the aluminum-based brake friction plate.
In the invention, in the step (1), the mixing temperature is preferably 20-30 ℃, and more preferably 25-28 ℃; the mixing time is preferably 1 to 3min, and more preferably 100 to 150 s.
In the invention, in the step (2), the pressure of the hot press molding is preferably 600-650 kg/cm 2 More preferably 610 to 640kg/cm 2 (ii) a The hot press molding temperature is preferably 160-180 ℃, and further preferably 165-175 ℃; the time for hot press molding is preferably 5-7 min, and more preferably 6 min.
In the present invention, in the step (2), the preparation of the pre-pressed aluminum substrate comprises the steps of:
mixing the aluminum alloy powder, the tungsten carbide and the titanium diboride powder, and then sequentially carrying out heat treatment and hot pressing treatment to obtain a pre-pressed aluminum substrate;
the temperature of the heat treatment is preferably 800-900 ℃, and more preferably 850-890 ℃; the time is preferably 10-15 min, and more preferably 11-14 min;
the temperature of the hot pressing treatment is preferably 800-900 ℃, and more preferably 850-890 ℃; the pressure is preferably 500 to 550kg/cm 2 More preferably 510 to 530kg/cm 2 (ii) a The time is preferably 40 to 50s, and furtherThe step is preferably 45-48 s.
In the present invention, in the step (3), the sintering includes a first stage sintering, a second stage sintering, and a third stage sintering;
the sintering temperature of the first-stage sintering is preferably 400-500 ℃, and further preferably 450-480 ℃; the sintering temperature of the second-stage sintering is preferably 600-800 ℃, and further preferably 650-700 ℃; the sintering temperature of the third-stage sintering is preferably 900-1000 ℃, and further preferably 950 ℃;
the sintering time of the first stage sintering, the second stage sintering and the third stage sintering is preferably 20-30 min independently, and more preferably 25-28 min independently.
In the invention, the heating rate of heating to the sintering temperature in the first stage sintering is preferably 2-3 ℃/min, and more preferably 2.5 ℃/min; in the second stage of sintering, the heating rate of heating to the sintering temperature is preferably 4-5 ℃/min, and further preferably 4.5 ℃/min; in the third stage of sintering, the heating rate of heating to the sintering temperature is preferably 2-3 ℃/min, and more preferably 2.5 ℃/min.
In the invention, in the step (3), the sintered friction plate blank is cooled to room temperature along with a furnace, so as to obtain the aluminum-based brake friction plate.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The raw materials comprise:
the aluminum substrate (8 penetrating holes with the diameter of 1cm are uniformly arranged on the periphery) comprises the following raw materials in parts by weight: 35 parts of aluminum alloy powder, 1 part of tungsten carbide and 0.1 part of titanium diboride powder; the friction material comprises the following raw materials in parts by mass: 75 parts of copper powder, 25 parts of iron powder, 10 parts of silicon dioxide, 35 parts of rubber powder, 5 parts of aluminum powder, 5 parts of zinc powder, 10 parts of graphene, 2.5 parts of light magnesium oxide, 5 parts of precipitated barium sulfate and 2.5 parts of mica; wherein the mass ratio of the aluminum matrix to the friction material is 36.1: 175;
the preparation process comprises the following steps:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler at 26 ℃ for 70s to obtain a friction material mixture;
(2) pre-pressing of the aluminum substrate: mixing aluminum alloy powder, tungsten carbide and titanium diboride powder, sequentially performing heat treatment at 820 deg.C for 12min, at 810 deg.C and 510kg/cm 2 Carrying out hot pressing treatment for 40s under pressure to obtain a pre-pressed aluminum substrate;
(3) hot-press molding: placing the pre-pressed aluminum matrix and friction material mixture into a mold at 170 deg.C and 610kg/cm 2 Performing hot-press molding for 5min to obtain a friction plate blank;
(4) and (3) heat treatment: and putting the friction plate blank into a sintering furnace, heating to 400 ℃ at a heating rate of 2 ℃/min, preserving heat for 20min, heating to 610 ℃ at a heating rate of 4 ℃/min, preserving heat for 22min, and finally heating to 960 ℃ at a heating rate of 2 ℃/min, preserving heat for 20min to obtain the aluminum-based brake friction plate.
Example 2
The raw materials comprise:
the aluminum substrate (10 penetrating holes with the diameter of 0.8cm are uniformly arranged on the periphery) comprises the following raw materials in percentage by mass: 36 parts of aluminum alloy powder, 1.1 parts of tungsten carbide and 0.2 part of titanium diboride powder; the friction material comprises the following raw materials in parts by mass: 78 parts of copper powder, 26 parts of iron powder, 13 parts of silicon dioxide, 36 parts of rubber powder, 9 parts of aluminum powder, 3 parts of zinc powder, 10 parts of graphene, 2.5 parts of light magnesium oxide, 7 parts of precipitated barium sulfate and 1.5 parts of mica; wherein the mass ratio of the aluminum matrix to the friction material is 37.3: 186;
the preparation process comprises the following steps:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler at 23 ℃ for 120s to obtain a friction material mixture;
(2) pre-pressing of the aluminum substrate: mixing aluminum alloy powder, tungsten carbide and titanium diboride powder, sequentially performing heat treatment at 850 deg.C for 13min, at 860 deg.C and 530kg/cm 2 Performing hot pressing treatment for 40s to obtain a pre-pressed aluminum substrate;
(3) hot-press molding: placing the pre-pressed aluminum matrix and friction material mixture into a moldAt 175 ℃ and 620kg/cm 2 Performing hot-press molding for 5min to obtain a friction plate blank;
(4) and (3) heat treatment: and putting the friction plate blank into a sintering furnace, heating to 420 ℃ at a heating rate of 2.5 ℃/min, preserving heat for 20min, heating to 630 ℃ at a heating rate of 4 ℃/min, preserving heat for 25min, and heating to 1000 ℃ at a heating rate of 2 ℃/min, preserving heat for 20min to obtain the aluminum-based brake friction plate.
Example 3
The raw materials comprise:
the aluminum substrate (12 penetrating holes with the diameter of 0.5cm are uniformly arranged on the periphery) comprises the following raw materials in percentage by mass: 38 parts of aluminum alloy powder, 1.3 parts of tungsten carbide and 0.3 part of titanium diboride powder; the friction material comprises the following raw materials in parts by mass: 90 parts of copper powder, 28 parts of iron powder, 15 parts of silicon dioxide, 45 parts of rubber powder, 6 parts of aluminum powder, 4 parts of zinc powder, 10 parts of graphene, 4 parts of light magnesium oxide, 7.5 parts of precipitated barium sulfate and 3.5 parts of mica; wherein the mass ratio of the aluminum matrix to the friction material is 39.6: 213;
the preparation process comprises the following steps:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler at 28 ℃ for 3min to obtain a friction material mixture;
(2) pre-pressing of the aluminum substrate: mixing aluminum alloy powder, tungsten carbide and titanium diboride powder, sequentially performing heat treatment at 880 deg.C for 12min, 870 deg.C, 525kg/cm 2 Performing hot pressing treatment for 50s to obtain a pre-pressed aluminum substrate;
(3) hot-press molding: placing the pre-pressed aluminum matrix and friction material mixture into a mold at 180 deg.C and 610kg/cm 2 Performing hot-pressing forming for 7min to obtain a friction plate blank;
(4) and (3) heat treatment: and putting the friction plate blank into a sintering furnace, heating to 500 ℃ at a heating rate of 2 ℃/min, preserving heat for 20min, heating to 750 ℃ at a heating rate of 5 ℃/min, preserving heat for 30min, and finally heating to 980 ℃ at a heating rate of 2 ℃/min, preserving heat for 20min to obtain the aluminum-based brake friction plate.
The brake pads on the market described below are selected from brake pads produced by the jinhong brake limited.
The performance of the aluminum-based brake friction plate obtained in the embodiment 1-3 is detected, and the detection result is shown in table 1:
TABLE 1 Performance test results for aluminum-based brake friction discs obtained in examples 1 to 3
Figure BDA0003639078880000121
The bonding strength between the aluminum substrate and the friction material of the aluminum-based brake friction plate obtained in the embodiment 1-3 at normal temperature and 80 ℃ is tested, and the test results are shown in table 2:
the test method comprises the following steps: the aluminum-based brake friction plates obtained in examples 1 to 3 and brake friction plates on the market are tested by respectively simulating the conventional friction plate use environment at normal temperature and 80 ℃.
TABLE 2 test results of adhesive strength of aluminum matrix and friction material at room temperature and 80 deg.C
Figure BDA0003639078880000122
Figure BDA0003639078880000131
As can be seen from Table 1, the performance of the aluminum-based brake friction plate obtained by the invention is superior to that of the conventional brake friction plate, the hardness, the friction coefficient and the shear strength of the aluminum-based brake friction plate are all improved, and the abrasion is obviously reduced;
as can be seen from Table 2, the friction plate of the aluminum-based brake, obtained by the method, can ensure that the aluminum substrate and the friction material have strong bonding strength at normal temperature and high temperature, and ensure that the friction material is not separated from the aluminum substrate, so that the existing requirements can be fully met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An aluminum-based brake friction pad, characterized in that the aluminum-based brake friction pad is composed of a friction material and an aluminum matrix;
the aluminum matrix comprises the following raw materials in percentage by mass: 30-50 parts of aluminum alloy powder, 0.9-1.3 parts of tungsten carbide and 0.1-0.3 part of titanium diboride powder;
the friction material comprises the following raw materials in parts by mass: 70-100 parts of copper powder, 25-30 parts of iron powder, 10-15 parts of silicon dioxide, 35-50 parts of rubber powder, 10-15 parts of an antiwear agent and 20-25 parts of a filler;
the mass ratio of the aluminum matrix to the friction material is 31-51.6: 170-235.
2. The aluminum-based brake friction plate of claim 1, wherein the aluminum substrate is an aluminum substrate with through holes uniformly formed at the periphery; the diameter of the penetrating hole is 0.3-1.2 cm.
3. The aluminum-based brake friction plate of claim 1, wherein the antiwear agent comprises aluminum powder and zinc powder, and the mass ratio of the aluminum powder to the zinc powder is 1-4: 1-3.5; the filler comprises graphene, light magnesium oxide, precipitated barium sulfate and mica, and the mass ratio of the graphene to the light magnesium oxide to the precipitated barium sulfate to the mica is 15-20: 5-8: 10-15: 3-7.
4. A method of manufacturing a friction plate for an aluminium-based brake as claimed in any one of claims 1 to 3, comprising the steps of:
(1) mixing raw materials: mixing copper powder, iron powder, silicon dioxide, rubber powder, an antiwear agent and a filler to obtain a friction material mixture;
(2) hot-press molding: carrying out hot press molding on the pre-pressed aluminum substrate and friction material mixture to obtain a friction plate blank;
(3) and (3) heat treatment: and sintering the friction plate blank to obtain the aluminum-based brake friction plate.
5. The method for preparing the friction plate of the aluminum-based brake according to claim 4, wherein in the step (1), the mixing temperature is 20-30 ℃ and the mixing time is 1-3 min.
6. The method for preparing the friction plate of the aluminum-based brake according to claim 5, wherein in the step (2), the pressure of the hot press forming is 600-650 kg/cm 2 The hot-press forming temperature is 160-180 ℃, and the hot-press forming time is 5-7 min.
7. The method for preparing an aluminum-based brake friction plate according to claim 6, wherein in the step (2), the pre-pressed aluminum substrate is prepared by the following steps:
mixing the aluminum alloy powder, the tungsten carbide and the titanium diboride powder, and then sequentially carrying out heat treatment and hot pressing treatment to obtain a pre-pressed aluminum substrate;
the temperature of the heat treatment is 800-900 ℃, and the time is 10-15 min;
the temperature of the hot-pressing treatment is 800-900 ℃, and the pressure is 500-550 kg/cm 2 The time is 40-50 s.
8. The method for preparing an aluminum-based brake friction plate according to claim 5 or 6, wherein in the step (3), the sintering comprises a first stage sintering, a second stage sintering and a third stage sintering;
the sintering temperature of the first stage sintering is 400-500 ℃; the sintering temperature of the second stage of sintering is 600-800 ℃; the sintering temperature of the third-stage sintering is 900-1000 ℃;
the sintering time of the first stage sintering, the second stage sintering and the third stage sintering is independently 20-30 min.
9. The method for preparing the friction plate of the aluminum-based brake according to claim 8, wherein the heating rate of the first stage sintering to the sintering temperature is 2-3 ℃/min; in the second stage of sintering, the heating rate of heating to the sintering temperature is 4-5 ℃/min; in the third stage of sintering, the heating rate of heating to the sintering temperature is 2-3 ℃/min.
10. The method for preparing an aluminum-based brake friction plate according to any one of claims 4 to 6, wherein in the step (3), the sintered friction plate blank is cooled to room temperature along with a furnace to obtain the aluminum-based brake friction plate.
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CN109226773A (en) * 2018-08-20 2019-01-18 北京科技大学 Hollow bolted node sphere of titanium alloy and preparation method thereof
CN111286642A (en) * 2020-03-26 2020-06-16 中南大学 Copper-based friction material suitable for carbon-ceramic brake disc and preparation method thereof
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* Cited by examiner, † Cited by third party
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CN101250651A (en) * 2008-04-02 2008-08-27 华南理工大学 Light car brake disk of silicon carbide particle reinforced aluminum metal-matrix composite material
CN201428765Y (en) * 2008-12-11 2010-03-24 临安华龙摩擦材料有限公司 Friction plate of electric piling car
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