CN115011066B - Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body - Google Patents

Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body Download PDF

Info

Publication number
CN115011066B
CN115011066B CN202210775761.9A CN202210775761A CN115011066B CN 115011066 B CN115011066 B CN 115011066B CN 202210775761 A CN202210775761 A CN 202210775761A CN 115011066 B CN115011066 B CN 115011066B
Authority
CN
China
Prior art keywords
friction
parts
brake shoe
composite brake
prepared
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210775761.9A
Other languages
Chinese (zh)
Other versions
CN115011066A (en
Inventor
钱钰升
李想
解小花
赵旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianyi Shangjia Tianjin New Material Co ltd
Original Assignee
Tianyi Shangjia Tianjin New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianyi Shangjia Tianjin New Material Co ltd filed Critical Tianyi Shangjia Tianjin New Material Co ltd
Priority to CN202210775761.9A priority Critical patent/CN115011066B/en
Publication of CN115011066A publication Critical patent/CN115011066A/en
Application granted granted Critical
Publication of CN115011066B publication Critical patent/CN115011066B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • 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
    • F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
    • 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
    • F16D69/025—Compositions based on an organic binder
    • F16D69/026—Compositions based on an organic binder containing fibres
    • 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
    • F16D69/028—Compositions based on metals or inorganic oxides containing fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/222—Magnesia, i.e. magnesium oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils
    • 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
    • F16D2200/0021—Steel
    • 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
    • F16D2200/0034—Materials; Production methods therefor non-metallic
    • F16D2200/0052—Carbon
    • 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
    • F16D2200/006—Materials; Production methods therefor containing fibres or particles
    • F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres
    • 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
    • F16D2200/0086—Moulding materials together by application of heat and pressure
    • 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
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0023—Shaping by pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Braking Arrangements (AREA)

Abstract

The application relates to the technical field of vehicle braking materials, and particularly discloses a friction composition, a friction body prepared from the friction composition and a composite brake shoe prepared from the friction body. The application discloses a friction composition which comprises the following components in parts by weight: 3-6 parts of chloroprene rubber; 2-5 parts of hydrogenated nitrile rubber; 10-12 parts of phenolic resin; 2-4 parts of dibutyl ester; 18-21 parts of steel fibers; 1-3 parts of polyacrylonitrile fiber; 7-12 parts of calcium hydroxide; 12-18 parts of petroleum coke; 1-1.5 parts of urotropine; 0.7-1.4 parts of sulfur; 0.5-1 part of promoter; 13-24 parts of friction performance regulator; the friction performance modifier comprises calcium sulfate whiskers; fumed silica; alumina by a gas phase method; calcining the light magnesium oxide. The application also discloses a friction body prepared by using the friction composition and a composite brake shoe prepared by using the friction body. The composite brake shoe prepared by the application can effectively reduce the high-low speed friction stability coefficient and the high-low pressure friction stability coefficient, thereby improving the stability of the friction coefficient of the composite brake shoe.

Description

Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body
Technical Field
The application relates to the technical field of vehicle braking materials, in particular to a friction composition, a friction body prepared from the friction composition and a composite brake shoe prepared from the friction body.
Background
With the upgrading optimization of a train braking system, the stability requirement on the train braking performance is higher and higher. Currently, urban rail transit vehicle brakes are classified into disc brakes and tread brakes. The disc brake adopts a brake caliper with brake pads to clamp brake discs arranged on two sides of a wheel or an axle so as to generate friction resistance to generate braking action; the tread braking is to press the tread of the wheel by adopting a brake shoe to generate friction resistance so as to generate braking action.
The composite brake shoe is an important component of a brake system of an urban rail transit vehicle and mainly comprises a steel back and a friction body, wherein the friction body comprises a binding material, a reinforcing material and friction filler. The average friction coefficient of the conventional composite brake shoe is usually 0.25-0.5, and the performance of the composite brake shoe affects the performance of train braking, the maintenance cost of the vehicle and the running safety of the train.
In the urban rail transit field, tread brake vehicle types are mainly divided into subway a type vehicles and subway B type vehicles. The subway A-type axle is heavy and has severe use conditions. In the braking process, the stability of the friction coefficient of a composite brake shoe of the subway A-type vehicle braking system is poor, so that the stability of train braking is reduced.
Disclosure of Invention
In order to further reduce fluctuation of friction coefficient of the composite brake shoe and improve stability of the friction coefficient of the composite brake shoe, and accordingly improve friction performance of the composite brake shoe, the application provides a friction composition, a friction body prepared by using the friction composition and the composite brake shoe prepared by using the friction body.
In a first aspect, the present application provides a friction composition, which adopts the following technical scheme:
a friction composition comprising the following components in parts by weight: 3-6 parts of chloroprene rubber; 2-5 parts of hydrogenated nitrile rubber; 10-12 parts of phenolic resin; 2-4 parts of dibutyl ester; 18-21 parts of steel fibers; 1-3 parts of polyacrylonitrile fiber; 7-12 parts of calcium hydroxide; 12-18 parts of petroleum coke; 1-1.5 parts of urotropine; 0.7-1.4 parts of sulfur; 0.5-1 part of promoter; 13-24 parts of friction performance regulator; the friction performance modifier comprises calcium sulfate whiskers; fumed silica; alumina by a gas phase method; calcining the light magnesium oxide.
According to the application, calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesium oxide are used as friction performance regulators, and then chloroprene rubber, hydrogenated nitrile rubber, phenolic resin, dibutyl ester, steel fiber, polyacrylonitrile fiber, calcium hydroxide, petroleum coke, urotropine, sulfur, an accelerator and the friction performance regulators are respectively weighed according to the ranges, and are used as components of a friction composition to prepare a friction body; the friction body is used for preparing the composite brake shoe, so that fluctuation of friction coefficients of the composite brake shoe under high-low speed and high-low pressure conditions can be effectively reduced, and the technical scheme provided by the application can effectively reduce the high-low speed friction stability coefficient and the high-low pressure friction stability coefficient of the composite brake shoe, so that the friction stability of the composite brake shoe is improved.
The calcium sulfate whisker and the fumed silica are rubber modifiers, and can improve the toughness, creep rate and temperature resistance of rubber, so that the high-low speed friction stability coefficient and the high-low pressure friction stability coefficient of the composite brake shoe are reduced. The gas phase method alumina and calcined light magnesia can improve the friction and abrasion performance of the friction body, so that the friction and abrasion performance of the friction body meets corresponding standard requirements, and meanwhile, the fluctuation of the friction coefficient of the composite brake shoe under high and low speed and high and low pressure conditions can be effectively reduced. Therefore, the application uses calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesia as friction performance regulator, and can effectively improve the friction stability of the composite brake shoe.
Experimental analysis shows that compared with the method which selects calcium sulfate particles, precipitated silica, precipitated alumina and heavy magnesia for use, the method selects calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesia as friction performance regulators, and can improve the friction stability of the composite brake shoe.
In addition, the steel fiber and the polyacrylonitrile fiber are reinforcing materials of the friction body, can provide enough capability of shock resistance, compression resistance and shearing resistance, avoid the friction body from being damaged and broken in the use process, and simultaneously endow the friction body with certain friction performance.
Calcium hydroxide is a filler which can be well matched with steel fibers, and a protective film is formed between the steel fibers and the pair to prevent excessive abrasion or scratch of the tread of the wheel.
Sulfur is a rubber vulcanizing agent, and can promote vulcanization of rubber in the friction body and improve elasticity of the friction body.
Preferably, the friction performance modifier is added in an amount of 16 to 20 parts.
In a specific embodiment, the friction performance modifier may be added in an amount of 13 parts, 16 parts, 18 parts, 20 parts, 24 parts.
In some specific embodiments, the friction performance modifier may also be added in an amount of 13-16 parts, 13-18 parts, 13-20 parts, 16-18 parts, 16-24 parts, 18-20 parts, 18-24 parts, 20-24 parts.
As shown by experimental analysis, when the addition amount of the friction performance regulator is controlled within the range, the prepared friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the addition amount of the friction performance modifier within the above-mentioned range.
Preferably, the friction performance regulator comprises the following components in parts by weight: 2-4 parts of calcium sulfate whisker; 4-8 parts of fumed silica; 1-4 parts of vapor phase alumina; 6-8 parts of calcined light magnesium oxide.
In a specific embodiment, the amount of calcium sulfate whisker added to the friction performance modifier may be 2 parts, 3 parts, 4 parts.
In some specific embodiments, the amount of calcium sulfate whisker added to the friction performance modifier may also be 2-3 parts, 3-4 parts.
As shown by experimental analysis, when the addition amount of the calcium sulfate whisker in the friction performance regulator is controlled within the range, the prepared friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the amount of calcium sulfate whisker added to the friction performance modifier within the above-mentioned range.
In a specific embodiment, the fumed silica may be added in an amount of 4 parts, 6 parts, 8 parts to the friction performance modifier.
In some specific embodiments, the fumed silica may also be added in an amount of 4 to 6 parts, 6 to 8 parts, to the friction performance modifier.
As shown by experimental analysis, when the addition amount of the fumed silica in the friction performance regulator is controlled within the range, the prepared friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the addition amount of fumed silica in the friction performance modifier within the above-mentioned range.
In a specific embodiment, the friction performance modifier may be added in an amount of 1 part, 3 parts, 4 parts of vapor phase alumina.
In some specific embodiments, the friction performance modifier may also be added in an amount of 1 to 3 parts, 3 to 4 parts, of vapor phase alumina.
As shown by experimental analysis, when the addition amount of the gas phase method alumina in the friction performance regulator is controlled within the range, the prepared friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the addition amount of the vapor phase alumina in the friction performance modifier within the above range.
In a specific embodiment, the calcined light magnesium oxide may be added to the friction performance modifier in an amount of 6 parts, 7 parts, 8 parts.
In some specific embodiments, the calcined light magnesium oxide may also be added in an amount of 6 to 7 parts, 7 to 8 parts, to the friction performance modifier.
As shown by experimental analysis, when the addition amount of the calcined light magnesium oxide in the friction performance regulator is controlled within the range, the prepared friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Accordingly, the present application controls the addition amount of the calcined light magnesium oxide in the friction performance modifier within the above-mentioned range.
Preferably, the performance indexes of each component in the friction performance regulator are as follows: the calcium sulfate whisker: purity is more than or equal to 98%, diameter is 0.5-1.2 mu m, length-diameter ratio is 20-30; the fumed silica: the purity is more than or equal to 99.8 percent, and the granularity is 0.2 to 0.5 mu m; the vapor phase method alumina: the purity is more than or equal to 99.5 percent, and the granularity is 10-16nm; the calcined light magnesium oxide: the purity is more than or equal to 95 percent, and the granularity is 35-55 mu m.
According to the application, the performance indexes of the calcium sulfate whisker, the fumed silica, the fumed alumina and the calcined light magnesium oxide in the friction performance regulator are controlled within the ranges, so that the granularity of the friction composition can be reduced, and the bonding strength of each component in the friction composition can be improved, thereby further improving the friction stability of the composite brake shoe.
In a second aspect, the present application provides a friction body prepared using the friction composition described above.
In a third aspect, the present application provides a method for preparing the friction body, specifically including the following steps:
(1) Carrying out open refining on the chloroprene rubber, the hydrogenated nitrile rubber, the phenolic resin and the dibutyl ester to obtain a material A;
(2) Fully mixing the steel fiber, the polyacrylonitrile fiber, the calcium hydroxide, the petroleum coke, the urotropine, the sulfur, the accelerator and the friction performance regulator to obtain a material B;
(3) Mixing and banburying the material A and the material B to obtain a banburying mixture;
(4) And preparing the banburying mixture into a particle mixture to obtain the friction body.
The phenolic resin of the application belongs to a friction material adhesive, and uniformly adheres fiber reinforced materials, fillers and the like together mainly in the form of an adhesive film to obtain a friction body with compact structure and high strength, thereby meeting the service performance requirements of a composite brake shoe.
Neoprene and hydrogenated nitrile rubber are also friction material adhesives, which, in addition to possessing the characteristics of the above adhesives, are friction material mechanical property modifiers that function to reduce the hardness and modulus of elasticity of the material, thereby reducing the aggressiveness of the material to the brake disc. Dibutyl ester is a plasticizing agent of rubber, and is used for improving the open-mixing effect of rubber, improving the fusion property of rubber and other materials and improving the uniformity of the mixture, thereby being beneficial to the preparation of friction bodies in composite brake shoes.
Preferably, the dibutyl ester is dibutyl phthalate.
Preferably, the open mill conditions are: the temperature is 50-60 ℃, the rotating speed is 15-25r/min, and the time is 8-12min.
Preferably, the banburying conditions are: the temperature is less than or equal to 120 ℃, the rotating speed is 35-40r/min, and the time is 5-10min.
Preferably, the particle size of the friction body is 7+ -1 mm.
In the process of preparing the friction body, firstly, the chloroprene rubber, the hydrogenated nitrile rubber, the phenolic resin and the dibutyl ester are subjected to open refining under the open refining conditions to obtain a binding material A; simultaneously, fully mixing the reinforcing fibers, other fillers and friction performance regulators to obtain a material B; and then mixing and banburying the prepared material A and material B according to the banburying conditions, and crushing the mixture into a particle mixture with the particle size of 7+/-1 mm to obtain the friction body. The preparation method is favorable for better fusion of the rubber raw material and other raw materials, thereby improving the uniformity of the mixture; the friction body is used for preparing the composite brake shoe, and the friction stability of the composite brake shoe can be further improved.
In a fourth aspect, the application also provides a composite brake shoe, which comprises a steel backing and the friction body.
In a fifth aspect, the present application also provides a method for preparing the composite brake shoe, which specifically includes the following steps:
(1) Pressing and forming the steel back and the friction body to prepare a semi-finished product of the composite brake shoe;
(2) And solidifying the semi-finished product of the brake shoe to prepare the composite brake shoe.
Further, the pressing conditions are: the temperature is 150-160 ℃; the pressure is 150-180t; the dwell time is 4-8 min.
Further, the curing conditions are: the temperature is 220-240 ℃; the time is 3-4h.
The application utilizes the steel back and the prepared friction body to obtain the composite brake shoe through compression molding and solidification, and the average friction coefficient of the composite brake shoe is within the range of 0.3+/-0.5, thereby meeting the conventional requirement of the composite brake shoe on the average friction coefficient. Meanwhile, the technical scheme provided by the application can effectively reduce the high-low speed friction stability coefficient and the high-low pressure friction stability coefficient of the composite brake shoe, thereby improving the friction stability of the composite brake shoe.
In a sixth aspect, the application also provides the use of the composite brake shoe in a vehicle braking system.
In summary, the technical scheme of the application has the following specific effects:
according to the application, the calcium sulfate whisker, the fumed silica, the fumed alumina and the calcined light magnesia are used as friction performance regulators and are matched with other components for use, and the prepared friction body is used for preparing the composite brake shoe, so that the fluctuation of the friction coefficient of the composite brake shoe under the conditions of high and low speed and high and low pressure can be effectively reduced, and the stability of the friction coefficient of the composite brake shoe is improved, thereby improving the friction performance of the composite brake shoe.
The application carries out open refining on chloroprene rubber, hydrogenated nitrile rubber, phenolic resin and dibutyl ester to obtain a binding material A; simultaneously, mixing reinforcing fibers, fillers and friction performance regulators to obtain a material B; then mixing and banburying the material A and the material B, and crushing to obtain a friction body; the friction body and the steel back are pressed and solidified to obtain the composite brake shoe, and the friction stability of the composite brake shoe can be further improved.
The composite brake shoe provided by the application is used for a vehicle braking system, and can effectively improve the service braking stability of a train, thereby reducing the maintenance cost of the train and improving the running safety of the train.
Detailed Description
In a first aspect, the present application provides a friction composition comprising the following components in parts by weight: 3-6 parts of chloroprene rubber; 2-5 parts of hydrogenated nitrile rubber; 10-12 parts of phenolic resin; 2-4 parts of dibutyl ester; 18-21 parts of steel fibers; 1-3 parts of polyacrylonitrile fiber; 7-12 parts of calcium hydroxide; 12-18 parts of petroleum coke; 1-1.5 parts of urotropine; 0.7-1.4 parts of sulfur; 0.5-1 part of promoter; 13-24 parts of friction performance regulator; the friction performance modifier comprises calcium sulfate whisker; fumed silica; alumina by a gas phase method; calcining the light magnesium oxide.
Further, the friction performance modifier is added in an amount of 16 to 20 parts.
Specifically, the friction performance regulator comprises the following components in parts by weight: 2-4 parts of calcium sulfate whisker; 4-8 parts of fumed silica; 1-4 parts of vapor phase alumina; 6-8 parts of calcined light magnesium oxide.
Further, the performance indexes of each component in the friction performance regulator are as follows: calcium sulfate whisker: purity is more than or equal to 98%, diameter is 0.5-1.2 mu m, length-diameter ratio is 20-30; fumed silica: the purity is more than or equal to 99.8 percent, and the granularity is 0.2 to 0.5 mu m; vapor phase alumina: the purity is more than or equal to 99.5 percent, and the granularity is 10-16nm; calcining light magnesium oxide: the purity is more than or equal to 95 percent, and the granularity is 35-55 mu m.
In addition, dibutyl phthalate is dibutyl phthalate.
In a second aspect, the present application also provides a friction body prepared from the friction composition described above.
In a third aspect, the present application also provides a method for preparing the friction body, which specifically includes the following steps:
(1) Adding chloroprene rubber, hydrogenated nitrile rubber, phenolic resin and dibutyl ester into an open mill, and performing open mill to obtain a material A;
(2) Fully mixing steel fibers, polyacrylonitrile fibers, calcium hydroxide, gas-phase alumina, petroleum coke, calcined light magnesium oxide, urotropine, sulfur and friction performance regulator by adopting a mixer to obtain a material B;
(3) Putting the materials A and B into an internal mixer for banburying to obtain a banburying mixture;
(4) And preparing the banburying mixture into a particle mixture with the particle size of 7+/-1 mm by adopting a crusher, namely the friction body.
Specifically, the conditions of the open mill in the step (1) are as follows: the temperature is 50-60 ℃, the rotating speed is 15-25r/min, and the time is 8-12min.
The mixing conditions in the step (2) are as follows: the rotating speed is 1800-2300r/min, and the time is 5-10min.
The banburying conditions in the step (3) are as follows: the temperature is less than or equal to 120 ℃, the rotating speed is 35-40r/min, and the time is 5-10min.
In a fourth aspect, the application also provides a composite brake shoe, which comprises a steel backing and the friction body.
In a fifth aspect, the present application also provides a method for preparing the composite brake shoe, which specifically includes the following steps:
(1) Placing a steel backing into a press die, then adding 1.8-2.4Kg of friction body, maintaining the pressure for 4-8min under the conditions of 150-160 ℃ and 150-180t of pressing pressure, and performing compression molding to prepare a semi-finished product of the composite brake shoe;
(2) And (3) curing the semi-finished product of the brake shoe in a curing oven at 220-240 ℃ for 3-4 hours to prepare the composite brake shoe.
In a sixth aspect, the application also provides the use of the composite brake shoe in the field of vehicle braking systems.
The present application is described in further detail below in connection with preparation examples 1-40, examples 1-21 and comparative examples 1-19, and performance test, which should not be construed as limiting the scope of the application as claimed.
Preparation example
Preparation examples 1 to 17
Preparation examples 1 to 17 each provide a friction body.
The preparation examples are different in that: the addition amount of each component in the friction performance modifier. Specifically, the results are shown in Table 1.
The preparation method of the friction body in each preparation example specifically comprises the following steps:
(1) 4.5Kg of chloroprene rubber, 3.5Kg of hydrogenated nitrile rubber, 11Kg of phenolic resin and 3Kg of dibutyl phthalate are weighed and added into an open mill for open mill, the temperature of the open mill is 55 ℃, the rotating speed is 20r/min, and the open mill time is 10min, so that the material A is prepared.
(2) Weighing 19.5Kg of steel fiber, 2Kg of polyacrylonitrile fiber, 9.5Kg of calcium hydroxide, 15Kg of petroleum coke, 1.2Kg of urotropine, 1Kg of sulfur, 0.8Kg of accelerator and 18Kg of friction performance regulator, adding into a mixer at the rotating speed of 2000r/min for 8min to prepare a material B;
wherein, the performance indexes of each component in the friction performance regulator are as follows: calcium sulfate whisker: purity 98%, diameter 0.8 μm, aspect ratio 25; fumed silica: purity 99.8%, granularity 0.3 μm; vapor phase alumina: purity 99.5%, granularity 13nm; calcining light magnesium oxide: purity 95%, particle size 45 μm; the addition amounts of the components in the friction performance modifier are shown in table 1.
(3) And (3) putting the materials A and B into an internal mixer for banburying at the temperature of 100 ℃ and the rotating speed of 35r/min for 7min to obtain a banburying mixture.
(4) And preparing the banburying mixture into a particle mixture with the particle size of 7+/-1 mm by adopting a crusher, namely the friction body.
TABLE 1 addition amount of each component in friction property modifiers of preparation examples 1 to 17
PREPARATION EXAMPLES 18 to 23
Preparation examples 18 to 23 each provide a friction body.
Each of the above preparation examples is different from preparation example 3 in that: the amount of friction modifier added. As shown in table 2.
TABLE 2 addition amount of friction property adjusting agent in preparation examples 3, 18-23
PREPARATION EXAMPLES 24 to 35
Preparation examples 24 to 35 each provide a friction body.
Each of the above preparation examples is different from preparation example 3 in that: the type of each component in the friction performance modifier. Specifically, the results are shown in Table 3.
TABLE 3 types of the components in the friction performance modifiers of PREPARATIVE EXAMPLES 3, 24-35
Preparation example 36
Preparation 36 provides a friction body, respectively.
The present preparation example differs from preparation example 3 in that: the friction performance regulator contains calcium sulfate particles with purity of 85% and granularity of 25 μm.
Preparation example 37
Preparation 37 provides a friction body, respectively.
The present preparation example differs from preparation example 3 in that: the silicon dioxide in the friction performance regulator is precipitated silicon dioxide, the performance index is that the purity is 80 percent, and the granularity is 10 mu m.
Preparation example 38
Preparation 38 provides a friction body, respectively.
The present preparation example differs from preparation example 3 in that: the alumina in the friction performance regulator is precipitated alumina, the performance index is that the purity is 85%, and the granularity is 30 μm.
Preparation example 39
Preparation 39 provides a friction body, respectively.
The present preparation example differs from preparation example 3 in that: the magnesium oxide in the friction performance regulator is heavy magnesium oxide, and the performance indexes are as follows: purity 80%, particle size 500 μm.
Preparation example 40
Preparation 40 provides a friction body, respectively.
The present preparation example differs from preparation example 3 in that: the friction body is prepared by different methods.
The preparation method of the friction body in the preparation example specifically comprises the following steps:
(1) Weighing 4.5Kg of chloroprene rubber, 3.5Kg of hydrogenated nitrile rubber, 11Kg of phenolic resin, 3Kg of dibutyl phthalate, 19.5Kg of steel fiber, 2Kg of polyacrylonitrile fiber, 9.5Kg of calcium hydroxide, 15Kg of petroleum coke, 1.2Kg of urotropine, 1Kg of sulfur, 0.8Kg of accelerator and 18Kg of friction performance regulator, adding into a mixer, wherein the rotating speed is 2000r/min, and the mixing time is 8min; then putting the mixture into an internal mixer for internal mixing, wherein the temperature of the internal mixer is 100 ℃, the rotating speed is 35r/min, and the internal mixing time is 7min, so as to obtain an internal mixing material;
wherein the addition amount and performance index of each component in the friction performance modifier are the same as those of preparation example 3.
(2) And preparing the banburying mixture into a particle mixture with the particle size of 7+/-1 mm by adopting a crusher, namely the friction body.
Examples
Examples 1 to 21
Examples 1-21 each provide a composite brake shoe.
The above embodiments differ in that: type of friction body. Specifically, the results are shown in Table 4.
The preparation method of the composite brake shoe specifically comprises the following steps:
1. and (3) placing a steel backing into a press die, then adding 2Kg of friction body, maintaining the pressure for 6min under the conditions of 155 ℃ and 165t of pressing pressure, and performing compression molding to prepare the semi-finished product of the composite brake shoe.
2. And (3) curing the semi-finished product of the brake shoe in a curing oven at 230 ℃ for 3.5 hours to prepare the composite brake shoe.
TABLE 4 types of friction bodies in examples 1-21
Comparative example
Comparative examples 1 to 19
Comparative examples 1-19 each provide a composite brake shoe.
Each of the above comparative examples is different from example 3 in that: type of friction body. Specifically, the results are shown in Table 5.
TABLE 5 types of friction bodies in comparative examples 1-19
Performance test
1. Average friction coefficient of composite brake shoe
The average friction coefficient of the composite brake shoes was tested using the composite brake shoes provided in examples 1 to 21 and comparative examples 1 to 19 as a test subject.
The detection method comprises the following steps: according to the emergency braking working conditions specified in the T/CAMET 04004.9 standard, braking is carried out under different pressure conditions (0.6 Fb, fb and 1.2 Fb) and under different initial braking speed conditions (40 Km/h, 60Km/h, 80Km/h and 90 Km/h), and the average friction coefficient of the composite brake shoe is collected after braking.
Detection result: as shown in table 6.
TABLE 6 average coefficient of friction for composite brake shoes at different initial speeds under different pressure conditions
/>
/>
/>
2. Speed friction stability coefficient and pressure friction stability coefficient of composite brake shoe
The average friction coefficient of the composition brake shoes under each working condition was calculated based on the average friction coefficient of the composition brake shoes in Table 6 by taking the composition brake shoes provided in examples 1 to 21 and comparative examples 1 to 19 as the detection object.
(1) Under certain pressure, the speed friction stability coefficient of the composite brake shoe
The calculation formula of the speed friction stability coefficient is shown in formula (1):
λ v ＝[(μ 40 -μ v ) 2 +(μ 60 -μ v ) 2 +(μ 80 -μ v ) 2 +(μ 90 -μ v ) 2 ] 1/2 /(2μ v ) X 100% type (1)
Wherein lambda is v The speed friction stability coefficient of the composite brake shoe under a certain pressure condition is represented;
μ 40 the average friction coefficient of the composite brake shoe is shown when the initial braking speed is 40Km/h under a certain pressure condition;
μ 60 the average friction coefficient of the composite brake shoe is shown when the initial braking speed is 60Km/h under a certain pressure condition;
μ 80 the average friction coefficient of the composite brake shoe is shown when the initial braking speed is 80Km/h under a certain pressure condition;
μ 90 the average friction coefficient of the composite brake shoe is shown when the initial braking speed is 90Km/h under a certain pressure condition;
μ v the average value of the average friction coefficient of the composite brake shoe under the condition of a certain pressure and different initial braking speeds is shown.
Under a certain pressure condition, the detection result of the speed friction stability coefficient of the composite brake shoe comprises the following steps: as shown in table 7.
(2) Pressure friction stability coefficient of composite brake shoe under certain initial braking speed condition
The calculation formula of the pressure friction stability coefficient is shown as (2):
λ f ＝＝[(μ 0.6 -μ f ) 2 +(μ 1 -μ f ) 2 +(μ 1.2 -μ f ) 2 ] 1/2 /(3 1/2 μ f ) X 100% type (2)
Wherein lambda is f The pressure friction stability coefficient of the composite brake shoe is represented under the condition of a certain initial braking speed;
μ 0.6 the average friction coefficient of the composite brake shoe is shown when the pressure is 0.6Fb KN under the condition of a certain initial braking speed;
μ 1 the average friction coefficient of the composite brake shoe is shown under the condition of a certain initial braking speed and when the pressure is 1Fb KN;
μ 1.2 the average friction coefficient of the composite brake shoe is shown when the pressure is 1.2Fb KN under the condition of a certain initial braking speed;
μ f the average value of the average friction coefficient of the composite brake shoe under the condition of a certain initial braking speed and different pressure conditions is shown.
Under a certain initial braking speed condition, the detection result of the pressure friction stability coefficient of the composite brake shoe: as shown in table 7.
TABLE 7 speed and pressure Friction stability factors for the average coefficient of friction of composite brake shoes under various operating conditions
/>
Referring to Table 6, as is clear from the results of comparative examples 1 to 21 and comparative examples 1 to 19, the present application uses calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesia as friction property modifiers, and then weighs 3 to 6 parts of neoprene, 2 to 5 parts of hydrogenated nitrile rubber, 10 to 12 parts of phenolic resin, 2 to 4 parts of dibutyl ester, 18 to 21 parts of steel fiber, 1 to 3 parts of polyacrylonitrile fiber, 7 to 12 parts of calcium hydroxide, 12 to 18 parts of petroleum coke, 1 to 1.5 parts of urotropin, 0.7 to 1.4 parts of sulfur, 0.5 to 1 part of accelerator and 13 to 24 parts of friction property modifiers as components of a friction composition, and prepares a friction body by open mill, mixing, banburying and crushing; the average friction coefficient of the composite brake shoe prepared by the friction body fluctuates within the range of 0.3+/-0.5, and the conventional requirement of the composite brake shoe on the average friction coefficient is met.
Meanwhile, as can be seen from the detection results of comparative examples 1 to 21 and comparative examples 1 to 19, by adopting the technical scheme provided by the application, the fluctuation of the friction coefficient of the composite brake shoe under the conditions of high and low speed and high and low pressure can be effectively reduced, which indicates that the technical scheme provided by the application can effectively reduce the high and low speed friction stability coefficient and the high and low pressure friction stability coefficient of the composite brake shoe, thereby improving the friction stability of the composite brake shoe.
As can be seen from the detection results of comparative examples 3 and 3 to 14, compared with the method of selecting one, two or three of calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesium oxide as friction performance regulator, the method of the application selects the method of simultaneously using calcium sulfate whisker, fumed silica, fumed alumina and calcined light magnesium oxide as friction performance regulator, and the prepared friction body is used for preparing the composite brake shoe, so that the friction stability of the composite brake shoe can be effectively improved. Therefore, the application selects the calcium sulfate whisker, the gas phase method silicon dioxide, the gas phase method aluminum oxide and the calcined light magnesium oxide to be used as friction performance regulator simultaneously.
As is clear from the results of the comparison between the results of the comparative examples 3 and 15, the present application can improve the friction stability of the composite brake shoe by selecting the calcium sulfate whisker as a component of the friction performance modifier, compared with the selection of the calcium sulfate particle. Therefore, the present application selects the use of calcium sulfate whiskers as a component of the friction performance modifier.
As is clear from the results of the test of comparative examples 3 and 16, the present application can improve the friction stability of the composite brake shoe by selecting fumed silica as a component of the friction performance modifier, as compared to the use of precipitated silica. The present application therefore selects the use of fumed silica as a component of the friction performance modifier.
As is apparent from the results of the comparison between the test results of comparative example 3 and comparative example 17, the present application can improve the friction stability of the composite brake shoe by selecting the vapor phase alumina as a component of the friction performance modifier, as compared with the use of the precipitated alumina. Thus, the present application selects the use of vapor phase alumina as a component of the friction performance modifier.
As is apparent from the results of the comparison of example 3 and comparative example 18, the present application can improve the friction stability of the composite brake shoe by selecting calcined light magnesium oxide as a component of the friction performance modifier, as compared with the selection of heavy magnesium oxide. Thus, the present application selects the use of calcined light magnesia as a component of the friction performance modifier.
As is apparent from the results of the test of comparative examples 3, 18 to 21 and comparative examples 1 to 2, when the addition amount of the friction performance modifier is controlled within the range of 13 to 24 parts, the prepared friction body is used for the preparation of a composite brake shoe, and the friction stability of the composite brake shoe can be improved. Further, the present application controls the addition amount of the friction performance modifier within a range of 16 to 20 parts.
As is clear from the detection results of comparative examples 1 to 5, when the addition amount of the calcium sulfate whisker in the friction performance modifier is controlled within the range of 2 to 4 parts, the prepared friction body is used for the preparation of the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the amount of calcium sulfate whisker added to the friction performance modifier within the above-mentioned range.
As is clear from the results of comparative examples 3 and 6 to 9, when the addition amount of fumed silica in the friction performance modifier is controlled within the range of 4 to 8 parts, the friction body obtained by the preparation is used for the preparation of a composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the addition amount of fumed silica in the friction performance modifier within the above-mentioned range.
As is clear from the results of comparative examples 3 and 10 to 13, when the addition amount of the vapor phase alumina in the friction performance modifier is controlled within the range of 1 to 4 parts, the friction body obtained by the preparation is used for the preparation of the composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Therefore, the present application controls the addition amount of the vapor phase alumina in the friction performance modifier within the above range.
As is apparent from the results of comparative examples 3 and 14 to 17, when the addition amount of calcined light magnesium oxide in the friction performance modifier is controlled within the range of 6 to 8 parts, the friction body obtained by the preparation is used for the preparation of a composite brake shoe, and the friction stability of the composite brake shoe can be further improved. Accordingly, the present application controls the addition amount of the calcined light magnesium oxide in the friction performance modifier within the above-mentioned range.
As can be seen from the test results of comparative example 3 and comparative example 19, in the present application, compared with mixing all the components in the friction composition, neoprene, hydrogenated nitrile rubber, phenolic resin and dibutyl ester are firstly subjected to open-run to obtain a material a; mixing reinforcing fibers, other fillers and friction performance regulators to obtain a material B; and then mixing and banburying the prepared material A and material B, crushing the materials into particles, and preparing the friction body for preparing the composite brake shoe, so that the friction stability of the composite brake shoe can be further improved.
While the application has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the application and are intended to be within the scope of the application as claimed.

Claims (8)

1. A friction composition characterized in that it comprises the following components in parts by weight: 3-6 parts of chloroprene rubber; 2-5 parts of hydrogenated nitrile rubber; 10-12 parts of phenolic resin; 2-4 parts of dibutyl ester; 18-21 parts of steel fibers; 1-3 parts of polyacrylonitrile fiber; 7-12 parts of calcium hydroxide; 12-18 parts of petroleum coke; 1-1.5 parts of urotropine; 0.7-1.4 parts of sulfur; 0.5-1 part of promoter; 16-20 parts of friction performance regulator; the friction performance modifier comprises calcium sulfate whiskers; fumed silica; alumina by a gas phase method; calcining the light magnesium oxide;
the friction performance regulator comprises the following components in parts by weight: 2-4 parts of calcium sulfate whisker; 4-8 parts of fumed silica; 1-4 parts of vapor phase alumina; 6-8 parts of calcined light magnesium oxide.
2. A friction composition as recited in claim 1 wherein said friction performance modifier comprises the following performance indicators: the calcium sulfate whisker: purity is more than or equal to 98%, diameter is 0.5-1.2 mu m, length-diameter ratio is 20-30; the fumed silica: the purity is more than or equal to 99.8 percent, and the granularity is 0.2 to 0.5 mu m; the vapor phase method alumina: the purity is more than or equal to 99.5 percent, and the granularity is 10-16nm; the calcined light magnesium oxide: the purity is more than or equal to 95 percent, and the granularity is 35-55 mu m.
3. A friction body prepared using the friction composition according to any one of claims 1-2.
4. A method of producing a friction body as claimed in claim 3, comprising the steps of:
(1) Carrying out open refining on the chloroprene rubber, the hydrogenated nitrile rubber, the phenolic resin and the dibutyl ester to obtain a material A;
(2) Fully mixing the steel fiber, the polyacrylonitrile fiber, the calcium hydroxide, the petroleum coke, the urotropine, the sulfur, the accelerator and the friction performance regulator to obtain a material B;
(3) Mixing and banburying the material A and the material B to obtain a banburying mixture;
(4) And preparing the banburying mixture into a particle mixture to obtain the friction body.
5. The method of producing a friction body according to claim 4, wherein the open mill conditions are: the temperature is 50-60 ℃, the rotating speed is 15-25r/min, and the time is 8-12min.
6. A composite brake shoe comprising a steel backing and the friction body of claim 3.
7. The method for manufacturing a composite brake shoe according to claim 6, comprising the steps of:
(1) Pressing and forming the steel back and the friction body to prepare a semi-finished product of the composite brake shoe;
(2) And solidifying the semi-finished product of the brake shoe to prepare the composite brake shoe.
8. The use of a composite brake shoe according to claim 6 in the field of vehicle braking systems.
CN202210775761.9A 2022-07-01 2022-07-01 Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body Active CN115011066B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210775761.9A CN115011066B (en) 2022-07-01 2022-07-01 Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210775761.9A CN115011066B (en) 2022-07-01 2022-07-01 Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body

Publications (2)

Publication Number Publication Date
CN115011066A CN115011066A (en) 2022-09-06
CN115011066B true CN115011066B (en) 2023-08-15

Family

ID=83079204

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210775761.9A Active CN115011066B (en) 2022-07-01 2022-07-01 Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body

Country Status (1)

Country Link
CN (1) CN115011066B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104151638A (en) * 2014-07-29 2014-11-19 辽宁红德电碳制品有限公司 Cold-molding composite brake shoe for high-power locomotive, and preparation method of composite brake shoe
CN105111532A (en) * 2015-08-06 2015-12-02 广西大学 Calcium carbonate whisker reinforced rubber base friction material and preparation method therefor
CN105111675A (en) * 2015-08-06 2015-12-02 广西碳酸钙产业化工程院有限公司 Calcium carbonate whisker reinforced resin-rubber base friction material and preparation method therefor
CN111043202A (en) * 2019-12-31 2020-04-21 北京天宜上佳高新材料股份有限公司 Friction material, composite brake shoe and preparation method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102250583B (en) * 2011-05-21 2014-04-30 瑞阳汽车零部件（仙桃）有限公司 Less-copper friction material composition for brake block

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104151638A (en) * 2014-07-29 2014-11-19 辽宁红德电碳制品有限公司 Cold-molding composite brake shoe for high-power locomotive, and preparation method of composite brake shoe
CN105111532A (en) * 2015-08-06 2015-12-02 广西大学 Calcium carbonate whisker reinforced rubber base friction material and preparation method therefor
CN105111675A (en) * 2015-08-06 2015-12-02 广西碳酸钙产业化工程院有限公司 Calcium carbonate whisker reinforced resin-rubber base friction material and preparation method therefor
CN111043202A (en) * 2019-12-31 2020-04-21 北京天宜上佳高新材料股份有限公司 Friction material, composite brake shoe and preparation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
何林.《坡缕石及其微纳米材料的改性与工程应用》.国防工业出版社,2012,第54-55页. *

Also Published As

Publication number Publication date
CN115011066A (en) 2022-09-06

Similar Documents

Publication Publication Date Title
CN101000119B (en) Hydraulic brake hose with high antifatigue and production method
CN106763364B (en) Friction material, brake pad comprising friction material and method for manufacturing brake pad
CA1240090A (en) Universal cement for natural and synthetic rubber tire compounds
CN109372911B (en) Low-wear disc type friction plate and preparation method thereof
CN113124076A (en) Low-resin-based aramid pulp wear-resistant disc brake pad and preparation method thereof
CN110628216A (en) Friction material, friction lining and preparation method thereof
EP3130817B1 (en) Brake block and method for producing the same, and wheel tread brake device for railway vehicles
CN1958648A (en) Method for producing brake sheets of heavy load truck
CN106977780A (en) A kind of inflatable solid tyre high-elastic glue and preparation method
CN115011066B (en) Friction composition, friction body prepared from friction composition and composite brake shoe prepared from friction body
CN110594323A (en) Composite double-layer brake pad and preparation method thereof
CN1908038A (en) Nano material brake slice and preparing process thereof
CN104725681B (en) Composition as well as metro composition brake shoe and preparation method thereof
CN114957867B (en) Friction body composition for truck composite brake shoe and truck composite brake shoe prepared from friction body composition
CN106594133B (en) Non-metal-inlaid brake pad and production process thereof
CN110778629B (en) Brake material containing halide and preparation method and application thereof
CN105546001B (en) Composite friction material of recovery friction material preparation and preparation method thereof is pyrolyzed with brake shoe
CN113736150A (en) High-performance tread rubber composite material and preparation method and application thereof
CN114044948A (en) Dual-protection composition, wear-resistant material, brake drum type sheet and preparation method
CN114135612A (en) Method for preparing brake pad by using potassium magnesium titanate lamella crystal
CN1076804C (en) Hybrid brake assembly
CN114151480A (en) High-strength high-friction-coefficient wear-resistant automobile drum brake pad and preparation method thereof
CN114031356B (en) Composition, wear-resistant material, brake pad and preparation method thereof
CN117511206A (en) Friction material, synthetic brake pad prepared from friction material, and preparation method and application of friction material
CN104279253A (en) Brake block for bus and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant