CN106763364B - Friction material, brake pad comprising friction material and method for manufacturing brake pad - Google Patents
Friction material, brake pad comprising friction material and method for manufacturing brake pad Download PDFInfo
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- CN106763364B CN106763364B CN201611236141.9A CN201611236141A CN106763364B CN 106763364 B CN106763364 B CN 106763364B CN 201611236141 A CN201611236141 A CN 201611236141A CN 106763364 B CN106763364 B CN 106763364B
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- 239000002783 friction material Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 42
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 23
- 239000000377 silicon dioxide Substances 0.000 claims description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims description 21
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 claims description 20
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 19
- 239000011591 potassium Substances 0.000 claims description 19
- 229910052700 potassium Inorganic materials 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 18
- 229920000459 Nitrile rubber Polymers 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 229920006231 aramid fiber Polymers 0.000 claims description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 18
- 239000006229 carbon black Substances 0.000 claims description 18
- 229910052593 corundum Inorganic materials 0.000 claims description 18
- 239000010431 corundum Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 18
- 239000010439 graphite Substances 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 18
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 18
- 229910052796 boron Inorganic materials 0.000 claims description 15
- -1 boron modified phenolic resin Chemical class 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052959 stibnite Inorganic materials 0.000 description 1
- IHBMMJGTJFPEQY-UHFFFAOYSA-N sulfanylidene(sulfanylidenestibanylsulfanyl)stibane Chemical compound S=[Sb]S[Sb]=S IHBMMJGTJFPEQY-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- 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
- F16D69/027—Compositions based on metals or inorganic oxides
- F16D69/028—Compositions based on metals or inorganic oxides 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
- 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
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Braking Arrangements (AREA)
Abstract
the invention provides a friction material, a brake pad containing the friction material and a method for manufacturing the brake pad, wherein the friction material is characterized in that through reasonable selection and proportioning of raw material components, particularly the proportion of inorganic matters and organic matters is controlled and the types of the inorganic matters are adjusted, so that the components generate a synergistic cooperation effect, and finally, the brake pad manufactured by the friction material has the characteristics of good thermal stability, high impact strength, high hardness and wear resistance. It can be seen that the friction material of the present invention is capable of being applied to the braking of higher speed, greater thermal load and passenger capacity rail vehicles.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a friction material, a brake pad for rail transit containing the friction material and a method for manufacturing the brake pad.
Background
in the modern times, trains, automobiles, urban rails and the like have become irreplaceable vehicles for land passenger and goods transportation without exception, play a very important role in social life, and can foresee that the vehicle industry will be an important supporting industry of national economy for a long time in the future. With the increasing requirements of people on vehicle performance, such as high speed, heavy load, safety, reliability, comfortable riding, convenient operation, low energy consumption, no pollution, light weight and the like, the vehicle industry presents a vigorous and diversified development situation.
for a long time, the trains in China are always operated in a low-speed state, the high-speed degree of the railways is an important mark for judging whether national traffic is developed or not, the general speed of domestic subways is 100km/h, and the speed of individual lines is 120km/h and 140km/h, so that the requirement of rail traffic for fast adapting to high-speed development is met, and the research and development of brake pads with high-temperature resistance and excellent wear resistance are one of the current important subjects. For example, chinese patent document CN105524316A discloses a friction material without heavy metal, which comprises the following raw materials in parts by weight: 20-30 parts of steel fiber, 5-15 parts of mineral fiber, 5-15 parts of modified phenolic resin, 10-15 parts of nitrile rubber, 10-15 parts of styrene butadiene rubber, 2-3 parts of graphite, 3-4 parts of molybdenum disulfide, 5-8 parts of barium sulfate, 1-5 parts of aramid fiber, 1-5 parts of heavy calcium carbonate, 1-5 parts of heavy magnesium oxide, 1-3 parts of white corundum and 3-4 parts of silicon carbide. The brake pad prepared by the material does not contain heavy metal, so that the pollution to the environment can be reduced, and the brake pad also has higher hardness, good impact strength and compressive resistance, but has the defects of serious heat fading phenomenon, overlong emergency braking distance and larger abrasion loss in the continuous braking process, and can not meet the braking requirement of a high-speed train.
Disclosure of Invention
The invention aims to overcome the defects of heat fading phenomenon and large abrasion loss of the conventional brake pad, and further provides a friction material with good thermal stability and small abrasion loss, a brake pad comprising the friction material and a method for manufacturing the brake pad.
Therefore, the technical scheme for realizing the purpose is as follows:
The friction material comprises the following raw materials in parts by weight:
45-55 parts of steel fiber, 5-8 parts of modified phenolic resin, 5-8 parts of nitrile rubber, 10-12 parts of styrene butadiene rubber, 1-5 parts of graphite, 1-5 parts of antimony sulfide, 4-6 parts of potassium hexatitanate, 1-2 parts of silicon dioxide, 1-5 parts of aramid fiber, 1-2 parts of calcium carbonate, 2-5 parts of heavy magnesium oxide, 1-2 parts of white corundum, 1-2 parts of silicon carbide and 1-2 parts of carbon black.
Preferably, the friction material comprises the following components in parts by weight:
48-54 parts of steel fiber, 5.6-7.2 parts of boron modified phenolic resin, 5.8-7.8 parts of nitrile rubber, 10.2-11.7 parts of styrene butadiene rubber, 1.5-4 parts of graphite, 2-4.5 parts of antimony sulfide, 4.4-5.7 parts of potassium hexatitanate, 1.3-1.8 parts of silicon dioxide, 1.5-4.5 parts of aramid fiber, 1.2-1.9 parts of calcium carbonate, 2.8-4.6 parts of heavy magnesium oxide, 1.2-1.7 parts of white corundum, 1.4-1.8 parts of silicon carbide and 1.2-1.8 parts of carbon black.
More preferably, the friction material comprises the following raw materials in parts by weight:
49 parts of steel fiber, 6.4 parts of boron modified phenolic resin, 6 parts of nitrile rubber, 11.5 parts of styrene butadiene rubber, 3.1 parts of graphite, 2 parts of antimony sulfide, 5 parts of potassium hexatitanate, 1.5 parts of silicon dioxide, 3 parts of aramid fiber, 1.4 parts of calcium carbonate, 2.8 parts of heavy magnesium oxide, 1.7 parts of white corundum, 1.6 parts of silicon carbide and 1.5 parts of carbon black.
More preferably, the friction material comprises the following raw materials in parts by weight:
52 parts of steel fiber, 7 parts of boron modified phenolic resin, 7.5 parts of nitrile rubber, 10.8 parts of styrene butadiene rubber, 2.6 parts of graphite, 3.2 parts of antimony sulfide, 4.7 parts of potassium hexatitanate, 1.8 parts of silicon dioxide, 4 parts of aramid fiber, 1.7 parts of calcium carbonate, 3.9 parts of heavy magnesium oxide, 1.5 parts of white corundum, 1.4 parts of silicon carbide and 1.2 parts of carbon black.
More preferably, the friction material comprises the following raw materials in parts by weight:
54 parts of steel fiber, 5.8 parts of boron modified phenolic resin, 7.8 parts of nitrile rubber, 11.2 parts of styrene butadiene rubber, 3.7 parts of graphite, 4.5 parts of antimony sulfide, 4.4 parts of potassium hexatitanate, 1.3 parts of silicon dioxide, 2.5 parts of aramid fiber, 1.3 parts of calcium carbonate, 4.6 parts of heavy magnesium oxide, 1.4 parts of white corundum, 1.8 parts of silicon carbide and 1.8 parts of carbon black.
A brake pad for rail transit comprises the friction material.
a method for manufacturing the brake pad comprises the following steps:
(1) Mixing the components in proportion to obtain a mixture;
(2) pressing the mixture to obtain a blank;
(3) And heating and curing the blank to obtain the brake pad.
Preferably, the pressure in the step (2) is 8-12 MPa, and the time is 7-15 s.
preferably, the heating temperature in the step (3) is 160-200 ℃, and the curing time is 20-26 h.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. The friction material provided by the invention has the characteristics of good thermal stability, high impact strength, high hardness and wear resistance through reasonable selection and proportioning of the raw material components, especially control of the proportion of inorganic matters and organic matters and adjustment of the types of the inorganic matters, so that the components generate a synergistic cooperation effect, and finally, the brake pad prepared from the friction material has the characteristics of good thermal stability, high impact strength, high hardness and wear resistance. It can be seen that the friction material of the present invention is capable of being applied to the braking of higher speed, greater thermal load and passenger capacity rail vehicles.
in the friction material, the potassium hexatitanate whisker has excellent mechanical properties such as high strength, high modulus and the like, has excellent wear resistance, high temperature resistance and corrosion resistance, and plays a role of a framework when uniformly dispersed in phenolic resin; and the existence of the potassium hexatitanate whisker can develop an oriented structure, but anisotropy is not generated, so that the impact resistance of the product can be improved, and cracks are prevented from being generated. Antimony sulfide is black solid powder obtained by selecting and chemically purifying stibnite, has a lower melting point of 548 ℃, can generate a sintering effect similar to that of sintered ceramics at a high temperature, can prevent the material from being oxidized and combusted at the high temperature, keeps the friction stability of the material and improves the burning resistance of the material; the antimony sulfide can also reduce the decomposition speed of the organic adhesive at high temperature, prolong the service life of the material and play the roles of the high-temperature inorganic adhesive and the lubricating friction regulator; in addition, the antimony sulfide has lower hardness in high-temperature reaction in the braking process, and can reduce noise and vibration generated in the braking process of the friction material. The silicon dioxide as the grinding enhancer can improve the friction coefficient of the product at high temperature and has the characteristics of corrosion resistance and high temperature resistance; and when the silicon dioxide is mixed with rubber, the silicon dioxide can generate wet skid resistance on the rubber, the effect can prevent the brake pad from skidding in a dual mode under a wet (moist, rain and snow) condition, and the silicon dioxide also has the effects of oxidation resistance, ageing resistance and insulation. The addition of carbon black as a rubber reinforcing agent can significantly improve the tensile strength, tear strength, abrasion resistance and the like of the rubber.
2. According to the manufacturing method of the brake pad, the friction material is used as a raw material for producing the brake pad, the excellent mechanical property and thermal stability of the material are utilized, the pressure during pressing can be reduced, and the pressing time is shortened, so that the large-scale industrial production of the brake pad is facilitated.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. 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. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a friction material, which comprises the following raw materials:
45g of steel fiber, 6.5g of modified phenolic resin, 8g of nitrile rubber, 10g of styrene butadiene rubber, 5g of graphite, 3g of antimony sulfide, 6g of potassium hexatitanate, 1g of silicon dioxide, 3g of aramid fiber, 1g of calcium carbonate, 3.5g of heavy magnesium oxide, 2g of white corundum, 1.5g of silicon carbide and 1g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
Respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a mould, applying a pressure of 10MPa to press for 15s to obtain a blank, heating the blank to 160 ℃, and curing for 24h to obtain the brake pad A.
Example 2
The embodiment provides a friction material, which comprises the following raw materials:
50g of steel fiber, 5g of boron modified phenolic resin, 6.5g of nitrile rubber, 11g of styrene butadiene rubber, 1g of graphite, 5g of antimony sulfide, 5g of potassium hexatitanate, 1.5g of silicon dioxide, 1g of aramid fiber, 1.5g of calcium carbonate, 2g of heavy magnesium oxide, 1g of white corundum, 2g of silicon carbide and 2g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
Respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a die, applying a pressure of 9MPa to press for 12s to obtain a blank, heating the blank to 180 ℃, and curing for 22h to obtain the brake pad B.
example 3
the embodiment provides a friction material, which comprises the following raw materials:
55g of steel fiber, 8g of boron modified phenolic resin, 5g of nitrile rubber, 12g of styrene butadiene rubber, 3g of graphite, 1g of antimony sulfide, 4g of potassium hexatitanate, 2g of silicon dioxide, 5g of aramid fiber, 2g of calcium carbonate, 5g of heavy magnesium oxide, 1.5g of white corundum, 1g of silicon carbide and 1.5g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
respectively weighing the raw material components, uniformly mixing to form a mixture, placing the mixture in a mould, applying a pressure of 12MPa to press for 10s to obtain a blank, and heating the blank to 200 ℃ to cure for 20h to obtain the brake pad C.
example 4
the embodiment provides a friction material, which comprises the following raw materials:
48g of steel fiber, 7.2g of boron modified phenolic resin, 5.8g of nitrile rubber, 11.7g of styrene butadiene rubber, 4g of graphite, 2.6g of antimony sulfide, 5.7g of potassium hexatitanate, 1.4g of silicon dioxide, 4.5g of aramid fiber, 1.2g of calcium carbonate, 3.3g of heavy magnesium oxide, 1.2g of white corundum, 1.5g of silicon carbide and 1.3g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
Respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a die, applying a pressure of 8MPa to press for 12s to obtain a blank, heating the blank to 170 ℃, and curing for 26h to obtain the brake pad D.
Example 5
The embodiment provides a friction material, which comprises the following raw materials:
49g of steel fiber, 6.4g of boron modified phenolic resin, 6g of nitrile rubber, 11.5g of styrene butadiene rubber, 3.1g of graphite, 2g of antimony sulfide, 5g of potassium hexatitanate, 1.5g of silicon dioxide, 3g of aramid fiber, 1.4g of calcium carbonate, 2.8g of heavy magnesium oxide, 1.7g of white corundum, 1.6g of silicon carbide and 1.5g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
Respectively weighing the raw material components, uniformly mixing to form a mixture, placing the mixture in a mould, applying a pressure of 10MPa to press for 10s to obtain a blank, heating the blank to 180 ℃, and curing for 24h to obtain the brake pad E.
Example 6
The embodiment provides a friction material, which comprises the following raw materials:
52g of steel fiber, 7g of boron modified phenolic resin, 7.5g of nitrile rubber, 10.8g of styrene butadiene rubber, 2.6g of graphite, 3.2g of antimony sulfide, 4.7g of potassium hexatitanate, 1.8g of silicon dioxide, 4g of aramid fiber, 1.7g of calcium carbonate, 3.9g of heavy magnesium oxide, 1.5g of white corundum, 1.4g of silicon carbide and 1.2g of carbon black.
The method for manufacturing the brake pad by adopting the friction material comprises the following steps:
respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a mould, applying a pressure of 11MPa to press for 7s to obtain a blank, heating the blank to 175 ℃, and curing for 25h to obtain the brake pad F.
example 7
the embodiment provides a friction material, which comprises the following raw materials:
54g of steel fiber, 5.8g of boron modified phenolic resin, 7.8g of nitrile rubber, 11.2g of styrene butadiene rubber, 3.7g of graphite, 4.5g of antimony sulfide, 4.4g of potassium hexatitanate, 1.3g of silicon dioxide, 2.5g of aramid fiber, 1.3g of calcium carbonate, 4.6g of heavy magnesium oxide, 1.4g of white corundum, 1.8g of silicon carbide and 1.8g of carbon black.
the method for manufacturing the brake pad by adopting the friction material comprises the following steps:
Respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a die, applying a pressure of 1.5MPa to press for 8s to obtain a blank, heating the blank to 170 ℃, and curing for 26h to obtain the brake pad G.
Example 8
The embodiment provides a friction material, which comprises the following raw materials:
53g of steel fiber, 5.6g of boron modified phenolic resin, 6.8g of nitrile rubber, 10.2g of styrene butadiene rubber, 1.5g of graphite, 3.8g of antimony sulfide, 5.5g of potassium hexatitanate, 1.6g of silicon dioxide, 1.5g of aramid fiber, 1.9g of calcium carbonate, 4.2g of heavy magnesium oxide, 1.6g of white corundum, 1.7g of silicon carbide and 1.6g of carbon black.
the method for manufacturing the brake pad by adopting the friction material comprises the following steps:
respectively weighing the raw material components, uniformly mixing to form a mixture, putting the mixture into a mould, applying a pressure of 10MPa to press for 9s to obtain a blank, heating the blank to 190 ℃, and curing for 22H to obtain the brake pad H.
Comparative example 1
The composition of the raw materials of the friction material provided by the comparative example is the same as that of example 4 in the specification of Chinese patent document CN105524316A, and a brake pad I is finally prepared according to the method of the example.
Experimental example 1
The physical and mechanical properties of the brake pads A-I prepared by the invention are respectively tested, and the results are shown in Table 1.
TABLE 1 physical and mechanical Properties of the brake pads
experimental example 2
In order to examine the influence of temperature change on the friction coefficient value of the brake pad, the invention also carries out temperature rise tests on the brake pads D-I respectively, and the results are shown in Table 2.
TABLE 2 coefficient of friction values of each brake pad at different temperatures
| Brake pad | 100℃ | 150℃ | 200℃ | 250℃ | 300℃ | 350℃ |
| D | 0.51 | 0.52 | 0.51 | 0.50 | 0.43 | 0.41 |
| E | 0.53 | 0.53 | 0.51 | 0.51 | 0.46 | 0.45 |
| F | 0.52 | 0.52 | 0.52 | 0.50 | 0.46 | 0.44 |
| G | 0.53 | 0.52 | 0.52 | 0.51 | 0.47 | 0.45 |
| H | 0.52 | 0.52 | 0.52 | 0.50 | 0.45 | 0.42 |
| I | 0.50 | 0.50 | 0.49 | 0.49 | 0.38 | 0.27 |
Experimental example 3
According to the technical specification test standards of the TJ/JW 040-2014 AC transmission locomotive synthetic brake pad and the urban national road traffic vehicle synthetic brake pad, the brake pads D-I rotate at the rotating speed of 120km/h, after 8 hours of operation, the abrasion loss of each brake pad is tested, and the results are shown in Table 3.
TABLE 3 abrasion loss (g) of each brake pad
| Brake pad | D | E | F | G | H | I |
| Amount of wear | 1.44 | 1.40 | 1.41 | 1.40 | 1.45 | 1.56 |
it should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (5)
1. the brake pad for rail transit is characterized by comprising a friction material, wherein the friction material comprises the following raw materials in parts by weight: 48-54 parts of steel fiber, 5.6-7.2 parts of boron modified phenolic resin, 5.8-7.8 parts of nitrile rubber, 10.2-11.7 parts of styrene butadiene rubber, 1.5-4 parts of graphite, 2-4.5 parts of antimony sulfide, 4.4-5.7 parts of potassium hexatitanate, 1.3-1.8 parts of silicon dioxide, 1.5-4.5 parts of aramid fiber, 1.2-1.9 parts of calcium carbonate, 2.8-4.6 parts of heavy magnesium oxide, 1.2-1.7 parts of white corundum, 1.4-1.8 parts of silicon carbide and 1.2-1.8 parts of carbon black;
The manufacturing method of the brake pad for rail transit comprises the following steps:
(1) Mixing the raw materials in proportion to form a mixture;
(2) Pressing the mixture, wherein the pressing pressure is 8-12 MPa, and the pressing time is 7-15 s, so as to obtain a blank;
(3) And heating and curing the blank at the temperature of 160-200 ℃ for 20-26 h to obtain the brake pad.
2. The brake pad for rail transit of claim 1, wherein the friction material is composed of the following raw materials: 49 parts of steel fiber, 6.4 parts of boron modified phenolic resin, 6 parts of nitrile rubber, 11.5 parts of styrene butadiene rubber, 3.1 parts of graphite, 2 parts of antimony sulfide, 5 parts of potassium hexatitanate, 1.5 parts of silicon dioxide, 3 parts of aramid fiber, 1.4 parts of calcium carbonate, 2.8 parts of heavy magnesium oxide, 1.7 parts of white corundum, 1.6 parts of silicon carbide and 1.5 parts of carbon black.
3. The brake pad for rail transit of claim 1, wherein the friction material is composed of the following raw materials: 52 parts of steel fiber, 7 parts of boron modified phenolic resin, 7.5 parts of nitrile rubber, 10.8 parts of styrene butadiene rubber, 2.6 parts of graphite, 3.2 parts of antimony sulfide, 4.7 parts of potassium hexatitanate, 1.8 parts of silicon dioxide, 4 parts of aramid fiber, 1.7 parts of calcium carbonate, 3.9 parts of heavy magnesium oxide, 1.5 parts of white corundum, 1.4 parts of silicon carbide and 1.2 parts of carbon black.
4. The brake pad for rail transit of claim 1, wherein the friction material is composed of the following raw materials: 54 parts of steel fiber, 5.8 parts of boron modified phenolic resin, 7.8 parts of nitrile rubber, 11.2 parts of styrene butadiene rubber, 3.7 parts of graphite, 4.5 parts of antimony sulfide, 4.4 parts of potassium hexatitanate, 1.3 parts of silicon dioxide, 2.5 parts of aramid fiber, 1.3 parts of calcium carbonate, 4.6 parts of heavy magnesium oxide, 1.4 parts of white corundum, 1.8 parts of silicon carbide and 1.8 parts of carbon black.
5. A method for manufacturing a brake pad for rail transit according to any one of claims 1 to 4, comprising the steps of:
(1) mixing the raw materials in proportion to form a mixture;
(2) Pressing the mixture, wherein the pressing pressure is 8-12 MPa, and the pressing time is 7-15 s, so as to obtain a blank;
(3) and heating and curing the blank at the temperature of 160-200 ℃ for 20-26 h to obtain the brake pad.
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| CN108561467A (en) * | 2018-04-16 | 2018-09-21 | 中国科学院兰州化学物理研究所 | A kind of wind-driven generator Yaw brake block material and preparation method thereof |
| CN108571545B (en) * | 2018-07-05 | 2020-12-01 | 天宜上佳（天津）新材料有限公司 | Friction material, brake pad made of friction material and method for manufacturing brake pad |
| CN109667861B (en) * | 2018-12-12 | 2020-11-27 | 山东金麒麟股份有限公司 | Friction material, brake pad and method for preparing brake pad |
| CN112576663A (en) * | 2020-12-29 | 2021-03-30 | 沈阳远程摩擦密封材料有限公司 | Composite brake shoe for heavy-duty high-speed truck |
| CN112576665A (en) * | 2020-12-29 | 2021-03-30 | 沈阳远程摩擦密封材料有限公司 | Synthetic brake pad for wet weather urban rail |
| CN112576662A (en) * | 2020-12-29 | 2021-03-30 | 沈阳远程摩擦密封材料有限公司 | Submarine tunnel brake pad |
| CN112576664A (en) * | 2020-12-29 | 2021-03-30 | 沈阳远程摩擦密封材料有限公司 | Composite brake pad for railway vehicle with speed per hour less than or equal to 160km/h |
| CN114031356B (en) * | 2021-11-30 | 2023-03-24 | 北京天宜上佳高新材料股份有限公司 | Composition, wear-resistant material, brake pad and preparation method thereof |
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