CN114933776A - Rare earth oxide improved ceramic disc brake pad and preparation method thereof - Google Patents

Rare earth oxide improved ceramic disc brake pad and preparation method thereof Download PDF

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Publication number
CN114933776A
CN114933776A CN202210628702.9A CN202210628702A CN114933776A CN 114933776 A CN114933776 A CN 114933776A CN 202210628702 A CN202210628702 A CN 202210628702A CN 114933776 A CN114933776 A CN 114933776A
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CN
China
Prior art keywords
rare earth
brake pad
disc brake
modified
earth oxide
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CN202210628702.9A
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Chinese (zh)
Inventor
孙奇春
周磊
张先君
王志刚
黄显鹏
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Anhui Feiying Auto Parts Co ltd
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Anhui Feiying Auto Parts Co ltd
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Priority to CN202210628702.9A priority Critical patent/CN114933776A/en
Publication of CN114933776A publication Critical patent/CN114933776A/en
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    • 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
    • C08L61/14—Modified phenol-aldehyde condensates
    • 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—Compositions of linings; Methods of manufacturing
    • 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—Compositions of linings; Methods of manufacturing
    • F16D69/025—Compositions based on an organic binder
    • F16D69/026—Compositions based on an organic binder 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
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • 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
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • 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
    • 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
    • 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
    • F16D2250/0038—Surface treatment

Abstract

The invention provides a rare earth oxide improved ceramic disc brake pad and a preparation method thereof, wherein the disc brake pad comprises the following materials in percentage by weight: 7-9% of organic modified binder, 20-30% of rare earth modified reinforcing material fiber, 10-20% of friction performance regulator, 20-30% of antiwear lubricant, 5-10% of rare earth oxide, 2-5% of high-temperature inorganic binder, 5-8% of grinding enhancer and 20-30% of space filler; according to the invention, the rare earth oxide improved ceramic disc brake pad sample is prepared by a mould pressing method, and the disc brake pad finally prepared by rare earth modified brake pad reinforcing material fiber has the characteristics of high shear strength and stable friction coefficient, can still maintain higher friction coefficient and lower wear rate at the high temperature of 300-500 ℃, has low hardness (HRL 40-60), is comfortable to brake in the use process, has no noise, can resist frequent thermal change, has good thermal fatigue resistance, is less in ash falling, and is long in service life, safe and reliable.

Description

Rare earth oxide improved ceramic disc brake pad and preparation method thereof
Technical Field
The invention relates to the technical field of brake pad manufacturing, in particular to a rare earth oxide improved ceramic disc type brake pad and a preparation method thereof.
Background
The brake pad can be classified into a disc brake pad and a drum brake pad according to types, and the disc brake pad related to the invention is a component of a disc brake system, is fixed with a tyre of a vehicle, and is matched with a disc pad rotating at the same speed and a caliper to brake the vehicle. The disc brake has a disc fixed to the tyre and rotating at the same speed, and during braking, the disc is clamped by oil pressure to generate friction force. The brake pad is an important safety part of an automobile braking system, the quality of the brake pad directly influences the braking performance of an automobile, and the life and property safety of automobile drivers and passengers is concerned. Along with the rapid development of automobile science and technology, the requirements on the brake pad are higher and higher as the speed and the load of the automobile are improved.
Meanwhile, the automobile brake pad is also a class A key part of an automobile brake system, and is established by the nation as mandatory product authentication management in 2020, the friction performance of the brake pad is the most important and critical friction material, and the quality of the performance of the brake pad is related to the driving safety and reliability of the automobile. At present, the mainstream automobile disc brake pad in the market adopts metal or less metal resin-based friction materials, compared with the obsolete asbestos pad, the metal fiber reinforced resin-based friction material is more environment-friendly and has stable friction performance, but the defects of easy corrosion, high braking noise, easy damage to a dual disc, serious ash falling and the like exist in the mainstream automobile disc brake pad, in addition, the problems of large heat fading, poor wear resistance and the like exist at high temperature because the matrix adopts pure phenolic resin, and the common ceramic brake pad has the characteristics of unstable high-temperature friction coefficient, poor frequent heat change resistance, poor thermal fatigue resistance and the like.
Therefore, there is a need in the art to design a novel ceramic brake pad for overcoming the technical problems encountered in the prior art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention prepares the rare earth oxide improved ceramic disc brake pad sample by a mould pressing method, researches the influence of different rare earth oxides on the friction and wear performance and the main wear mechanism of the improved ceramic disc brake pad, and researches and provides a formula research and development of the rare earth oxide improved ceramic disc brake pad and a manufacturing technology thereof.
The invention solves the technical problems by the following scheme:
a rare earth oxide improved ceramic disc brake pad comprises the following materials in percentage by weight: 7-9% of organic modified binder, 20-30% of rare earth modified reinforcing material fiber, 10-20% of friction performance regulator, 20-30% of antiwear lubricant, 5-10% of rare earth oxide, 2-5% of high-temperature inorganic binder, 5-8% of grinding enhancer and 20-30% of space filler.
Preferably, the material formula of the organic modified binder comprises the following components in percentage by weight: 40-60% of nano-copper modified phenolic resin, 40-50% of cardanol modified phenolic resin and 5-15% of viscosity regulator.
Preferably, the material formula of the rare earth modified reinforced material fiber comprises the following components in percentage by weight: 20-35% of composite mineral fiber, 25-35% of calcium sulfate whisker, 20-30% of rare earth modified ceramic fiber, 5-15% of rare earth modified bamboo charcoal fiber, 5-15% of rare earth modified polyphenylene pyridobisimidazole fiber and 5-15% of rare earth modified polyimide fiber.
Preferably, the friction performance regulator comprises the following materials in percentage by weight: 20-40% of butyronitrile powder, 40-50% of red vermiculite and 20-40% of friction powder.
Preferably, the material formula of the antiwear lubricant comprises the following components in percentage by weight: 895 graphite 30-60%, artificial graphite 20-40%, calcined petroleum coke powder 10-20% and carbon black 5-15%.
Preferably, the rare earth oxide is a nano-scale rare earth composite oxide rich in praseodymium oxide, yttrium oxide, lug oxide and europium oxide.
Preferably, the material formula of the high-temperature inorganic binder comprises the following components in percentage by weight: 50-60% of antimony sulfide and 40-50% of molybdenum disulfide.
Preferably, the grinding enhancer is 40-50% of zirconium silicate and 50-60% of calcined superfine kaolin.
Preferably, the space filler is 60-70% of precipitated barium sulfate and 30-40% of cryolite.
The preparation method of the rare earth oxide improved ceramic disc brake pad comprises the following preparation steps:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, wherein the mixing time is 4-5 min;
(3) molding: weighing the mixture according to the brake pad type number, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 200-300 kg.f/cm 2 The hot pressing temperature is 145-155 ℃, gas is exhausted once every 10-15 s of pressing, 6-9 times of gas is exhausted in total, and the pressure maintaining time is 300-600 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 160-175 ℃ within 4-5 h, preserving heat for 6-8 h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material obtained in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 0.8-1.5 cm, heating to 100-120 ℃ from room temperature, preserving heat for 1-2 h, heating to 150-170 ℃, preserving heat for 3-5 h, finally heating to 180-200 ℃, preserving heat for 1-2 h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: and then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, grooving, plastic spraying, marking, processing and packaging according to the technical requirements to obtain the disc brake pad.
The beneficial technical effects which can be realized by the invention at least comprise: the disc brake pad produced by modifying the material by adding the rare earth and the oxide has the characteristics of high shearing strength and stable friction coefficient, can still maintain higher friction coefficient and lower wear rate for a long time at the high temperature of 300-500 ℃, has low hardness (HRL 40-60), is comfortable to brake during use, has no noise, can resist frequent thermal change, has good thermal fatigue resistance, less dust falling, long service life, and is safe and reliable. The production requirement is met, the large-scale production can be realized, the customer satisfaction is favorably improved, and the application and popularization are good.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific parameters in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A rare earth oxide improved ceramic disc brake pad comprises the following materials in percentage by weight: 7% of organic modified coagulant, 20% of rare earth modified reinforced material fiber, 10% of friction performance regulator, 25% of antiwear lubricant, 5% of rare earth oxide, 5% of high-temperature inorganic binder, 5% of grinding additive and 23% of space filler.
Further, the material formula of the organic modified binder comprises the following components in percentage by weight: 50% of nano-copper modified phenolic resin, 40% of cardanol modified phenolic resin and 10% of viscosity regulator.
Further, the material formula of the rare earth modified reinforced material fiber comprises the following components in percentage by weight: 35 percent of composite mineral fiber, 25 percent of calcium sulfate whisker, 20 percent of rare earth modified ceramic fiber, 10 percent of rare earth modified bamboo charcoal fiber, 5 percent of rare earth modified polyphenylene pyridino-diimidazole fiber and 5 percent of rare earth modified polyimide fiber
Further, the friction performance regulator comprises the following materials in percentage by weight: 30% of butyronitrile powder, 40% of red vermiculite and 30% of friction powder.
Further, the material formula of the anti-wear lubricant comprises the following components in percentage by weight: 895 graphite 50%, artificial graphite 30%, calcined petroleum coke powder 15% and carbon black 5%.
Furthermore, the rare earth oxide is a nanometer rare earth composite oxide rich in praseodymium oxide.
Further, the material formula of the high-temperature inorganic binder comprises the following components in percentage by weight: 60% of antimony sulfide and 40% of molybdenum disulfide.
Further, the grinding agent is 40% of zirconium silicate and 60% of calcined superfine kaolin.
Further, the space filler is 70% of precipitated barium sulfate and 30% of cryolite.
Based on the embodiment, the preparation method of the rare earth oxide improved ceramic disc brake pad further comprises the following preparation steps:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, wherein the mixing time is 5 min;
(3) molding: weighing the mixture according to the brake pad type scale, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 200 kg.f/cm 2 The hot pressing temperature is 155 ℃, gas is exhausted once every 15s of pressing, 6 times of gas is exhausted in total, and the pressure maintaining time is 600 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 160 ℃ within 5h, preserving heat for 8h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 1.0cm, heating from room temperature to 100 ℃, preserving heat for 2 hours, heating to 150 ℃, preserving heat for 3 hours, finally heating to 200 ℃, preserving heat for 2 hours, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: and then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, slotting, plastic spraying, mark printing, processing and packaging according to the technical requirements to obtain the disc brake pad.
Example 2
A rare earth oxide improved ceramic disc brake pad comprises the following materials in percentage by weight: 8% of organic modified coagulant, 22% of rare earth modified reinforced material fiber, 12% of friction performance regulator, 20% of antiwear lubricant, 6% of rare earth oxide, 4% of high-temperature inorganic binder, 6% of grinding additive and 22% of space filler.
Further, the material formula of the organic modified binder comprises the following components in percentage by weight: 55% of nano-copper modified phenolic resin, 40% of cardanol modified phenolic resin and 5% of viscosity regulator.
Further, the material formula of the rare earth modified reinforced material fiber comprises the following components in percentage by weight: 30% of composite mineral fiber, 30% of calcium sulfate whisker, 25% of rare earth modified ceramic fiber, 5% of rare earth modified bamboo charcoal fiber, 5% of rare earth modified polyphenylene pyridino-diimidazole fiber and 5% of rare earth modified polyimide fiber.
Further, the friction performance regulator comprises the following materials in percentage by weight: 40% of butyronitrile powder, 40% of red vermiculite and 20% of friction powder.
Further, the material formula of the anti-wear lubricant comprises the following components in percentage by weight: 895 graphite 40%, artificial graphite 30%, calcined petroleum coke powder 20% and carbon black 10%.
Further, the rare earth oxide is a nano-scale rare earth composite oxide rich in yttrium oxide.
Further, the material formula of the high-temperature inorganic binder comprises the following components in percentage by weight: 55% of antimony sulfide and 45% of molybdenum disulfide.
Further, the grinding aid is 45% of zirconium silicate and 55% of calcined ultrafine kaolin.
Further, the space filler is 60% of precipitated barium sulfate and 40% of cryolite.
Based on the embodiment, the preparation method of the rare earth oxide improved ceramic disc brake pad further comprises the following preparation steps:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, and mixing for 4 min;
(3) molding: weighing the mixture according to the brake pad type scale, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 300 kg.f/cm 2 The hot pressing temperature is 145 ℃, gas is exhausted once every 10s of pressing, 9 times of gas is exhausted in total, and the pressure maintaining time is 300 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 175 ℃ within 4h, preserving heat for 6h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 1.5cm, heating from room temperature to 120 ℃, preserving heat for 1h, heating to 170 ℃, preserving heat for 3h, finally heating to 180 ℃, preserving heat for 2h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: and then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, grooving, plastic spraying, marking, processing and packaging according to the technical requirements to obtain the disc brake pad.
Example 3
A rare earth oxide improved ceramic disc brake pad comprises the following materials in percentage by weight: 7.5 percent of organic modified coagulant, 21.5 percent of rare earth modified reinforced material fiber, 11 percent of friction performance regulator, 21 percent of antiwear lubricant, 7 percent of rare earth oxide, 3 percent of high-temperature inorganic binder, 8 percent of grinding enhancer and 21 percent of space filler.
Further, the material formula of the organic modified binder comprises the following components in percentage by weight: 45% of nano-copper modified phenolic resin, 45% of cardanol modified phenolic resin and 10% of viscosity regulator.
Further, the material formula of the rare earth modified reinforced material fiber comprises the following components in percentage by weight: 20% of composite mineral fiber, 30% of calcium sulfate whisker, 20% of rare earth modified ceramic fiber, 10% of rare earth modified bamboo charcoal fiber, 10% of rare earth modified polyphenylene pyridino-diimidazole fiber and 10% of rare earth modified polyimide fiber.
Further, the friction performance regulator comprises the following materials in percentage by weight: 35% of butyronitrile powder, 45% of red vermiculite and 20% of friction powder.
Further, the material formula of the antiwear lubricant comprises the following components in percentage by weight: 895% graphite, 25% artificial graphite, 15% calcined petroleum coke powder and 15% carbon black.
Further, the rare earth oxide is a nano rare earth composite oxide rich in oxidized lugs.
Further, the material formula of the high-temperature inorganic binder comprises the following components in percentage by weight: 50% of antimony sulfide and 50% of molybdenum disulfide.
Further, the grinding agent is 50% of zirconium silicate and 50% of calcined superfine kaolin.
Further, the space filler is 65% of precipitated barium sulfate and 35% of cryolite.
Based on the embodiment, the preparation method of the rare earth oxide improved ceramic disc brake pad further comprises the following preparation steps:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, wherein the mixing time is 5 min;
(3) molding: weighing the mixture according to the brake pad type scale, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 250 kg.f/cm 2 The hot pressing temperature is 150 ℃, gas is exhausted once every 15s of pressing, 7 times of gas are exhausted in total, and the pressure maintaining time is 450 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 165 ℃ within 5h, preserving heat for 7h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 0.8cm, heating from room temperature to 110 ℃, preserving heat for 2 hours, heating to 160 ℃, preserving heat for 4 hours, finally heating to 200 ℃, preserving heat for 2 hours, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, slotting, plastic spraying, marking, processing and packaging according to the technical requirements to obtain the disc brake pad
Example 4
A rare earth oxide improved ceramic disc brake pad comprises the following materials in percentage by weight: 8% of organic modified binder, 25% of rare earth modified reinforcing material fiber, 10% of friction performance regulator, 20% of antiwear lubricant, 10% of rare earth oxide, 2% of high-temperature inorganic binder, 5% of grinding additive and 20% of space filler.
Preferably, the material formula of the organic modified binder comprises the following components in percentage by weight: 45% of nano-copper modified phenolic resin, 40% of cardanol modified phenolic resin and 15% of viscosity regulator.
Preferably, the material formula of the rare earth modified reinforced material fiber comprises the following components in percentage by weight: 20% of composite mineral fiber, 25% of calcium sulfate whisker, 30% of rare earth modified ceramic fiber, 5% of rare earth modified bamboo charcoal fiber, 5% of rare earth modified polyphenylene pyridine diimidazole fiber and 15% of rare earth modified polyimide fiber.
Preferably, the friction performance regulator comprises the following materials in percentage by weight: 40% of butyronitrile powder, 40% of red vermiculite and 20% of friction powder.
Preferably, the material formula of the antiwear lubricant comprises the following components in percentage by weight: 895 graphite 30%, artificial graphite 40%, calcined petroleum coke powder 15% and carbon black 15%.
Preferably, the rare earth oxide is a europium oxide-rich nanoscale rare earth composite oxide.
Preferably, the material formula of the high-temperature inorganic binder comprises the following components in percentage by weight: 50% of antimony sulfide and 50% of molybdenum disulfide.
Preferably, the grinding aid is 50% zirconium silicate and 50% calcined ultrafine kaolin.
Preferably, the space filler is 65% precipitated barium sulfate and 35% cryolite.
Based on the above embodiment, there is further provided a method for preparing a rare earth oxide modified ceramic disc brake pad as described above, comprising the following steps:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, wherein the mixing time is 4 min;
(3) molding: weighing the mixture according to the brake pad type scale, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 250 kg.f/cm 2 The hot pressing temperature is 155 ℃, gas is exhausted once every 10s of pressing, 9 times of gas is exhausted in total, and the pressure maintaining time is 500 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 160 ℃ within 5h, preserving heat for 8h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 1.2cm, heating from room temperature to 120 ℃, preserving heat for 1h, heating to 170 ℃, preserving heat for 3h, finally heating to 200 ℃, preserving heat for 2h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: and then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, grooving, plastic spraying, marking, processing and packaging according to the technical requirements to obtain the disc brake pad.
The disc brake pad produced by modifying the material by adding the rare earth and the oxide has the characteristics of high shearing strength and stable friction coefficient, can still maintain higher friction coefficient and lower wear rate for a long time at the high temperature of 300-500 ℃, has low hardness (HRL 40-60), is comfortable to brake during use, has no noise, can resist frequent thermal change, has good thermal fatigue resistance, less dust falling, long service life, and is safe and reliable. The production requirement is met, the large-scale production can be realized, the customer satisfaction is favorably improved, and the application and popularization are good.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A rare earth oxide improved ceramic disc brake pad is characterized in that the material formula of the disc brake pad is as follows by weight percent: 7-9% of organic modified binder, 20-30% of rare earth modified reinforcing material fiber, 10-20% of friction performance regulator, 20-30% of wear-resistant lubricant, 5-10% of rare earth oxide, 2-5% of high-temperature inorganic binder, 5-8% of grinding enhancer and 20-30% of space filler.
2. The rare earth oxide improved ceramic disc brake pad of claim 1, wherein the material formula of the organic modified binder comprises the following components in percentage by weight: 40-60% of nano-copper modified phenolic resin, 40-50% of cardanol modified phenolic resin and 5-15% of viscosity regulator.
3. The rare earth oxide modified ceramic disc brake pad of claim 1, wherein the material formulation of the rare earth modified reinforcing material fiber comprises, in weight percent: 20-35% of composite mineral fiber, 25-35% of calcium sulfate whisker, 20-30% of rare earth modified ceramic fiber, 5-15% of rare earth modified bamboo charcoal fiber, 5-15% of rare earth modified polyphenylene pyridobisimidazole fiber and 5-15% of rare earth modified polyimide fiber.
4. The rare earth oxide modified ceramic disc brake pad of claim 1, wherein the friction performance modifier comprises the following materials in percentage by weight: 20-40% of butyronitrile powder, 40-50% of red vermiculite and 20-40% of friction powder.
5. The rare earth oxide modified ceramic disc brake pad of claim 1, wherein the anti-wear lubricant comprises a material formulation, in weight percent: 895 graphite 30-60%, artificial graphite 20-40%, calcined petroleum coke powder 10-20% and carbon black 5-15%.
6. The improved rare earth oxide ceramic disc brake pad of claim 1, wherein the rare earth oxide is a nano-sized rare earth composite oxide rich in praseodymium oxide, yttrium oxide, lug oxide, and europium oxide.
7. The rare earth oxide modified ceramic disc brake pad of claim 1, wherein the material formulation of the high temperature inorganic binder is, in weight percent: 50-60% of antimony sulfide and 40-50% of molybdenum disulfide.
8. The rare earth oxide improved ceramic disc brake pad according to claim 1, wherein the grinding enhancer is 40-50% of zirconium silicate and 50-60% of calcined ultrafine kaolin.
9. The rare earth oxide improved ceramic disc brake pad according to claim 1, wherein the space filler is 60-70% precipitated barium sulfate and 30-40% cryolite.
10. A method of manufacturing a rare earth oxide-modified ceramic disc brake pad according to any one of claims 1 to 9, comprising the steps of:
(1) preparing materials: accurately weighing raw materials of each component according to the weight percentage by using a material formula of the disc brake pad for later use;
(2) mixing materials: putting the weighed raw materials of each component into a vertical high-speed mixer, wherein the mixing time is 4-5 min;
(3) molding: weighing the mixture according to the brake pad type number, pouring the mixture into a hot-pressing mold, and setting the hot-pressing pressure to be 200-300 kg.f/cm 2 The hot pressing temperature is 145-155 ℃, gas is exhausted once every 10-15 s of pressing, 6-9 times of gas is exhausted in total, and the pressure maintaining time is 300-600 s;
(4) and (3) heat treatment: heating the brake pad subjected to hot press molding from room temperature to 160-175 ℃ within 4-5 h, preserving heat for 6-8 h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(5) spraying: uniformly spraying the mixed material obtained in the step 2 on the surface of the brake pad obtained by heat treatment in the step 4, wherein the spraying thickness is 0.8-1.5 cm, heating to 100-120 ℃ from room temperature, preserving heat for 1-2 h, heating to 150-170 ℃, preserving heat for 3-5 h, finally heating to 180-200 ℃, preserving heat for 1-2 h, and then stopping heating until the temperature of the oven is cooled to below 50 ℃;
(6) post-processing: and then the disc brake pad prepared by the process is subjected to plane grinding, chamfering, grooving, plastic spraying, marking, processing and packaging according to the technical requirements to obtain the disc brake pad.
CN202210628702.9A 2022-06-06 2022-06-06 Rare earth oxide improved ceramic disc brake pad and preparation method thereof Pending CN114933776A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644224A (en) * 2013-11-15 2014-03-19 宁国飞鹰汽车零部件股份有限公司 Novel rare earth compound type brake pad and preparation method thereof
CN106051006A (en) * 2016-07-11 2016-10-26 福州大学 Rare-earth oxide modified resin-based automotive brake friction material and preparation method thereof
CN107163498A (en) * 2017-07-12 2017-09-15 福州大学 A kind of rare earth-iron-boron modified natural fibers and its application on automobile brake material is prepared
CN113124076A (en) * 2021-04-20 2021-07-16 安徽飞鹰汽车零部件股份有限公司 Low-resin-based aramid pulp wear-resistant disc brake pad and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644224A (en) * 2013-11-15 2014-03-19 宁国飞鹰汽车零部件股份有限公司 Novel rare earth compound type brake pad and preparation method thereof
CN106051006A (en) * 2016-07-11 2016-10-26 福州大学 Rare-earth oxide modified resin-based automotive brake friction material and preparation method thereof
CN107163498A (en) * 2017-07-12 2017-09-15 福州大学 A kind of rare earth-iron-boron modified natural fibers and its application on automobile brake material is prepared
CN113124076A (en) * 2021-04-20 2021-07-16 安徽飞鹰汽车零部件股份有限公司 Low-resin-based aramid pulp wear-resistant disc brake pad and preparation method thereof

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