CN106238722A - A kind of brake pad with great friction coefficient and preparation method thereof - Google Patents
A kind of brake pad with great friction coefficient and preparation method thereof Download PDFInfo
- Publication number
- CN106238722A CN106238722A CN201610632723.2A CN201610632723A CN106238722A CN 106238722 A CN106238722 A CN 106238722A CN 201610632723 A CN201610632723 A CN 201610632723A CN 106238722 A CN106238722 A CN 106238722A
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- China
- Prior art keywords
- brake pad
- weight portion
- copper
- powder
- brake
- Prior art date
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- Granted
Links
- 238000002360 preparation method Methods 0.000 title abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 claims abstract description 26
- 239000010949 copper Substances 0.000 claims abstract description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims abstract description 11
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 238000009692 water atomization Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 23
- 238000005299 abrasion Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000004663 powder metallurgy Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002783 friction material Substances 0.000 description 4
- 229920002994 synthetic fiber Polymers 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910017755 Cu-Sn Inorganic materials 0.000 description 2
- 229910017927 Cu—Sn Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PHKJVUUMSPASRG-UHFFFAOYSA-N 4-[4-chloro-5-(2,6-dimethyl-8-pentan-3-ylimidazo[1,2-b]pyridazin-3-yl)-1,3-thiazol-2-yl]morpholine Chemical compound CC=1N=C2C(C(CC)CC)=CC(C)=NN2C=1C(=C(N=1)Cl)SC=1N1CCOCC1 PHKJVUUMSPASRG-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 102100021752 Corticoliberin Human genes 0.000 description 1
- 241000271559 Dromaiidae Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 101000895481 Homo sapiens Corticoliberin Proteins 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004137 mechanical activation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0089—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with other, not previously mentioned inorganic compounds as the main non-metallic constituent, e.g. sulfides, glass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0026—Non-ferro
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—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
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a kind of brake pad with great friction coefficient and preparation method thereof, the composition of raw materials of described brake pad includes following components: copper source, eutectoid steel grounds travel, copper coated graphite powder, Iron sulfuret., nickel source, silicon dioxide and molybdenum oxide, being sufficiently mixed by each raw material components rear compressing, gained base substrate i.e. prepares the brake pad of the present invention after hot pressed sintering, isothermal cooling.The present invention rational proportion by above-mentioned raw materials, and strictly control heating-up temperature and suitable isothermal cooling process, the density making the material produced is greatly improved, and materials microstructure and structure the most stable, the hot conditions produced during high-speed train braking can be applicable to, the most all the time there are stable great friction coefficient and low abrasion so that the brake pad prepared by the method for the invention has coefficient of friction height, the advantages such as little, stable friction performance, length in service life of wearing and tearing under high speed brake condition simultaneously.
Description
Technical field
The present invention relates to powder metallurgical technology, be specifically related to a kind of brake pad with great friction coefficient and system thereof
Preparation Method.
Background technology
Friction material is to produce the brake of various plant equipment, clutch and the indispensable material of friction gearing
One of material, it utilizes frictional force that the kinetic energy of moving object is converted into heat energy and distributes to air, so that object slows down or stops
Only motion.The research of friction material has been begun to since vehicle comes out, especially over nearly 20 years, fluffy along with transport undertaking
The exhibition of breaking out, the research and development for friction material are more and more deep, emerged many novel friction materials, as cast iron, bronze,
High molecular synthetic material, powdered metallurgical material, carbon/carbon compound material etc., wherein, high molecular synthetic material and powdered metallurgical material
It it is the mainstay material being currently used for producing railroad train brake pad.
Along with increasing sharply of railway passenger and freight transportation amount, the high speed of railway transportation has become inevitable development trend, 200
～the EMUs field of 250km/h can use high molecular synthetic material as brake material, such as CRH1 trailer brake brake lining, but
In the train braking field of more speed, high molecular synthetic material is because its intensity is low, poor heat resistance, heat decline seriously, it is impossible to be suitable for
In the brake request of more than 300km/h bullet train, and powdered metallurgical material is by optimization of C/C composites and technique, can reach intensity
The effects such as height, good, the stable friction performance of heat conductivity, are therefore a kind of ideal bullet train brake lining brake materials.
Powder metallurgy brake pad is broadly divided into iron-based and the big class of cuprio two, due to hardness and the intensity of ferrous based powder metallurgical brake lining
Higher, the most again with its antithesis parts (wheel or brake disc) containing more same metal--ferrum, cause intermiscibility good so that lock
Generation localized hyperthermia during mill, contact surface are occurred to adhere and adhesive wear, thus cause iron-based powder with wheel or brake disc by sheet
The surface of the antithesis parts of metallurgical brake lining usually there will be fire check and deeper polishing scratch.In consideration of it, more and more study cause
Power is in the exploitation of copper-base powder metallurgy brake lining, and prior art is generally added metallic tin in copper based powder metallurgy material system and formed
Cu-Sn alloy is to strengthen matrix, and such as, Chinese patent literature CN101602105B discloses a kind of copper-base powder metallurgy damper brake
Sheet material, is made up of following raw material: mechanical alloy powder Cu-Sn:10～80%, mechanical activation powder Ti-C:1.25～15%, Ni:0
～10%, Cr:0～12%, Al2O3: 2～8%, graphite: 7.75～23%.Above-mentioned formula is based on copper, without iron powder, but by
Being low melting point (231.86 DEG C) metal in stannum, the moment friction high temperature of brake area be enough to make it soften and even melts, and equally can
Produce adhesion and adhesive wear phenomenon, cause the coefficient of friction fluctuation under train high speed brake condition of above-mentioned brake lining material relatively big,
And along with the passage of active time, the intensity of material and frictional behaviour are all by sharp-decay, state of wear compared with brand-new state
Under coefficient of friction can be greatly reduced, abrasion loss increases, and causes the above-mentioned brake pad can not effective brake.
Therefore, how to improve the formula of existing copper based powder metallurgy material and processing technique to overcome above-mentioned not
Foot, is those skilled in the art's big technical barriers urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved is to overcome existing copper-base powder metallurgy brake lining for train at a high speed
The problem that existing during braking coefficient of friction decay is substantially, abrasion loss is big, and then a kind of stable friction performance and wear-resisting is provided
Brake pad with great friction coefficient damaged and preparation method thereof.
To this end, the present invention to realize the technical scheme that above-mentioned purpose used as follows:
A kind of brake pad with great friction coefficient, including following raw material components:
Copper source, 52-62 weight portion；
Eutectoid steel grounds travel, 8-12 weight portion；
Copper coated graphite powder, 6-15 weight portion；
Iron sulfuret., 2-6 weight portion；
Nickel source, 3-8 weight portion；
Silicon dioxide, 4-6 weight portion；
Molybdenum oxide, 6-12 weight portion.
Preferably, there is described in the brake pad of great friction coefficient and include following raw material components:
Copper source, 55-60 weight portion；
Eutectoid steel grounds travel, 9-11 weight portion；
Copper coated graphite powder, 7-13 weight portion；
Iron sulfuret., 3-5 weight portion；
Nickel source, 4-6 weight portion；
Silicon dioxide, 5-6 weight portion；
Molybdenum oxide, 8-11 weight portion.
Copper source is one or more in electrolytic copper powder, copper reduction or water atomization copper powder.
Described eutectoid steel grounds travel is ground to obtained by particle diameter is 200-300 mesh by eutectoid steel.
Described nickel source is one or more in electrolytic nickel powder, reduced nickel powder or water atomization nikel powder.
A kind of method preparing above-mentioned brake pad, comprises the following steps:
(1) weigh each raw material components according to above-mentioned weight portion and be sufficiently mixed, obtaining compound；
(2) by compressing for the compound in step (1), base substrate is obtained；
(3) base substrate in step (2) is carried out hot pressed sintering, after isothermal cools down, i.e. prepare the braking of described great friction coefficient
Brake lining.
In step (2), described compressing pressure is 15-25Mpa, and the time is 10-20s.
In step (3), the concrete operations of described hot pressed sintering are: use hot press that described base substrate is heated to 800-860
DEG C, and it is incubated 0.2-0.5h.
In step (3), the concrete operations of described isothermal cooling are: after being cooled to 500 DEG C with the speed of 5-30 DEG C/min, protect
Temperature 30min, then air cooling is to room temperature.
The technique scheme of the present invention has the advantage that
1, the brake pad with great friction coefficient of the present invention, its composition of raw materials includes following components: copper source,
Eutectoid steel grounds travel, copper coated graphite powder, Iron sulfuret., nickel source, silicon dioxide and molybdenum oxide, reasonable by between above-mentioned each component
Proportioning, can prepare the brake pad with great friction coefficient, and its coefficient of friction fluctuation under train high speed brake condition
Little, abrasion loss is low, frictional behaviour is sufficiently stable, it is possible to meets the brake request of bullet train, effectively overcomes existing cuprio
The problem that coefficient of friction decay is obvious, abrasion loss is big that powder metallurgy brake pad is existing when for train braking at a high speed.
2, the preparation method of brake pad of the present invention be each raw material components is sufficiently mixed after the most compressing, gained
Base substrate can be prepared by the brake pad of the present invention after hot pressed sintering, isothermal cooling, and the above-mentioned preparation method of the present invention is by tight
Lattice control heating-up temperature and suitable isothermal cooling processes so that the density of the material produced is greatly improved, and the group of material
Knit the most stable with structure, it is possible to be applicable to the hot conditions produced during high-speed train braking, in use begin simultaneously
There are stable great friction coefficient and low abrasion eventually so that the brake pad prepared by the method for the invention is in braking feelings at a high speed
There is under condition coefficient of friction height, the advantages such as little, stable friction performance, length in service life of wearing and tearing.
Detailed description of the invention
Technical scheme will be clearly and completely described below, it is clear that described embodiment is this
Bright a part of embodiment rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.Additionally, below
Just can be mutual as long as technical characteristic involved in described difference embodiment of the present invention does not constitutes conflict each other
In conjunction with.In following example, 1 weight portion represents 1g.
Embodiment 1
The brake pad with great friction coefficient described in the present embodiment, including following raw material components:
Electrolytic copper powder, 52 weight portions；
Particle diameter is the eutectoid steel grounds travel of 200 mesh, 12 weight portions；
Copper coated graphite powder, 7 weight portions；
Iron sulfuret., 5 weight portions；
Electrolytic nickel powder, 6 weight portions；
Silicon dioxide, 4 weight portions；
Molybdenum oxide, 8 weight portions.
Brake pad described in the present embodiment is prepared by the following method:
(1) weigh each raw material components according to above-mentioned weight portion to be placed in ball mill carrying out being sufficiently mixed 4h, mixed
Material；
(2) being filled in mould by the compound in step (1), under the pressure of 15MPa, pressurize 20s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 860 DEG C, and be incubated 0.2h, then with 25 DEG C/
The speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad, is designated as brake lining A.
Embodiment 2
The brake pad with great friction coefficient described in the present embodiment, including following raw material components:
Copper reduction, 62 weight portions；
Particle diameter is the eutectoid steel grounds travel of 300 mesh, 8 weight portions；
Copper coated graphite powder, 13 weight portions；
Iron sulfuret., 2 weight portions；
Electrolytic nickel powder, 8 weight portions；
Silicon dioxide, 6 weight portions；
Molybdenum oxide, 6 weight portions.
Brake pad described in the present embodiment is prepared by the following method:
(1) weigh each raw material components according to above-mentioned weight portion to be placed in ball mill carrying out being sufficiently mixed 4h, mixed
Material；
(2) being filled in mould by the compound in step (1), under the pressure of 20MPa, pressurize 15s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 800 DEG C, and be incubated 0.5h, then with 5 DEG C/
The speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad, is designated as brake lining B.
Embodiment 3
The brake pad with great friction coefficient described in the present embodiment, including following raw material components:
Water atomization copper powder, 57 weight portions；
Particle diameter is the eutectoid steel grounds travel of 250 mesh, 11 weight portions；
Copper coated graphite powder, 15 weight portions；
Iron sulfuret., 6 weight portions；
Reduced nickel powder, 3 weight portions；
Silicon dioxide, 5 weight portions；
Molybdenum oxide, 12 weight portions.
Brake pad described in the present embodiment is prepared by the following method:
(1) weigh each raw material components according to above-mentioned weight portion to be placed in ball mill carrying out being sufficiently mixed 4h, mixed
Material；
(2) being filled in mould by the compound in step (1), under the pressure of 25MPa, pressurize 10s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 860 DEG C, and be incubated 0.35h, then with 30 DEG C/
The speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad, is designated as brake lining C.
Embodiment 4
The brake pad with great friction coefficient described in the present embodiment, including following raw material components:
Electrolytic copper powder, 55 weight portions；
Particle diameter is the eutectoid steel grounds travel of 280 mesh, 9 weight portions；
Copper coated graphite powder, 6 weight portions；
Iron sulfuret., 4 weight portions；
Water atomization nikel powder, 4 weight portions；
Silicon dioxide, 5 weight portions；
Molybdenum oxide, 11 weight portions.
Brake pad described in the present embodiment is prepared by the following method:
(1) weigh each raw material components according to above-mentioned weight portion to be placed in ball mill carrying out being sufficiently mixed 4h, mixed
Material；
(2) being filled in mould by the compound in step (1), under the pressure of 18MPa, pressurize 20s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 850 DEG C, and be incubated 0.2h, then with 17.5
DEG C/speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad, is designated as brake lining
D。
Embodiment 5
The brake pad with great friction coefficient described in the present embodiment, including following raw material components:
Copper reduction, 60 weight portions；
Particle diameter is the eutectoid steel grounds travel of 220 mesh, 10 weight portions；
Copper coated graphite powder, 10.5 weight portions；
Iron sulfuret., 3 weight portions；
Electrolytic nickel powder, 5.5 weight portions；
Silicon dioxide, 4 weight portions；
Molybdenum oxide, 9 weight portions.
Brake pad described in the present embodiment is prepared by the following method:
(1) weigh each raw material components according to above-mentioned weight portion to be placed in ball mill carrying out being sufficiently mixed 4h, mixed
Material；
(2) being filled in mould by the compound in step (1), under the pressure of 22MPa, pressurize 15s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 830 DEG C, and be incubated 0.4h, then with 10 DEG C/
The speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad, is designated as brake lining E.
Comparative example 1
The metal-based powder metallurgy brake pad F that this comparative example provides, its formula is same as in Example 5, but this brake lining F
Preparation method is as follows:
(1) weigh each raw material components according to the weight portion described in embodiment 5 to be placed in ball mill being sufficiently mixed
4h, obtains compound；
(2) being filled in mould by the compound in step (1), under the pressure of 22MPa, pressurize 15s can be compressing
Obtain base substrate；
(3) use hot press to directly heat the base substrate in step (2) to 1000 DEG C, and be incubated 0.2h, then with 10 DEG C/
The speed of min is cooled to 500 DEG C, and is incubated 30min, then air cooling is to room temperature, i.e. prepares described brake pad F.
Comparative example 2
The metal-based powder metallurgy brake pad G that this comparative example provides, its formula is same as in Example 5, but this brake lining G
Preparation method is as follows:
(1) weigh each raw material components according to the weight portion described in embodiment 5 to be placed in ball mill being sufficiently mixed
4h, obtains compound；
(2) being filled in mould by the compound in step (1), under the pressure of 22MPa, pressurize 15s can be compressing
Obtain base substrate；
(3) using hot press to directly heat the base substrate in step (2) to 830 DEG C, and be incubated 0.2h, then air cooling is to room
Temperature, i.e. prepares described brake pad G.
Experimental example
Use the TM-I type track train that Xi'an Shuntong Institute Of Electrical And Applied Technology develops as brake pad frictional property
The subscale test platform instrument that can test, the brake pad A-G preparing embodiment of the present invention 1-5 and comparative example 1-2 is simulated
Immobilization test, specific experiment parameter is as shown in table 1:
The experiment parameter of table 1 simulating brake test
According to above-mentioned method of testing, detection obtains the average friction coefficient of each brake pad and wears away as shown in table 2.
The frictional behaviour test result of table 2 brake pad A-G
From table 2 it can be seen that the average friction coefficient that brake pad A-E is when speed per hour 300-350km/h is braked is the highest
In 0.421, and stable friction factor, the average wear in the whole motor process of 0-350km/h is less than 0.26cm3/ MJ, and
The coefficient of friction of brake pad F-G less (less than 0.375) under the same terms, and in use coefficient of friction is unstable
Determine, fluctuate relatively greatly, abrasion up to 0.38cm3/ MJ, this has absolutely proved that the brake pad of the present invention not only has higher friction
Coefficient, and when braking at a high speed, coefficient of friction fluctuation is little, abrasion loss is low, frictional behaviour is highly stable, it is possible to meet bullet train
Brake request.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (9)
1. a brake pad with great friction coefficient, it is characterised in that include following raw material components:
Copper source, 52-62 weight portion；
Eutectoid steel grounds travel, 8-12 weight portion；
Copper coated graphite powder, 6-15 weight portion；
Iron sulfuret., 2-6 weight portion；
Nickel source, 3-8 weight portion；
Silicon dioxide, 4-6 weight portion；
Molybdenum oxide, 6-12 weight portion.
Brake pad the most according to claim 1, it is characterised in that include following raw material components:
Copper source, 55-60 weight portion；
Eutectoid steel grounds travel, 9-11 weight portion；
Copper coated graphite powder, 7-13 weight portion；
Iron sulfuret., 3-5 weight portion；
Nickel source, 4-6 weight portion；
Silicon dioxide, 5-6 weight portion；
Molybdenum oxide, 8-11 weight portion.
Brake pad the most according to claim 1 and 2, it is characterised in that copper source be electrolytic copper powder, copper reduction or
One or more in water atomization copper powder.
4. according to the brake pad described in any one of claim 1-3, it is characterised in that described eutectoid steel grounds travel is by eutectoid
Steel is ground to obtained by particle diameter is 200-300 mesh.
5. according to the brake pad described in any one of claim 1-4, it is characterised in that described nickel source is electrolytic nickel powder, reduction
One or more in nikel powder or water atomization nikel powder.
6. the method for the brake pad prepared described in any one of claim 1-5, it is characterised in that comprise the following steps:
(1) weigh each raw material components according to above-mentioned weight portion and be sufficiently mixed, obtaining compound；
(2) by compressing for the compound in step (1), base substrate is obtained；
(3) base substrate in step (2) is carried out hot pressed sintering, after isothermal cools down, i.e. prepare described great friction coefficient damper brake
Sheet.
The method preparing brake pad the most according to claim 6, it is characterised in that in step (2), described compressing
Pressure be 15-25MPa, the time is 10-20s.
8. according to the method preparing brake pad described in claim 6 or 7, it is characterised in that in step (3), described hot pressing
The concrete operations of sintering are: use hot press that described base substrate is heated to 800-860 DEG C, and be incubated 0.2-0.5h.
9. according to the method preparing brake pad described in any one of claim 6-8, it is characterised in that in step (3), described
The concrete operations of isothermal cooling are: after being cooled to 500 DEG C with the speed of 5-30 DEG C/min, be incubated 30min, then air cooling is to room temperature.
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| CN201610632723.2A CN106238722B (en) | 2016-08-04 | 2016-08-04 | A kind of brake pad with great friction coefficient and preparation method thereof |
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| CN201610632723.2A CN106238722B (en) | 2016-08-04 | 2016-08-04 | A kind of brake pad with great friction coefficient and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107058790B (en) * | 2017-04-05 | 2019-01-22 | 中国铁道科学研究院金属及化学研究所 | A kind of enhanced powder metallurgy friction material of intermetallic compound and its preparation method and application |
| CN110695364A (en) * | 2019-11-15 | 2020-01-17 | 博深股份有限公司 | Motor train unit brake pad material and method for manufacturing same |
| CN111390160A (en) * | 2020-04-30 | 2020-07-10 | 滁州欧瑞斯机车部件有限公司 | Preparation method of high-friction-coefficient brake material |
| CN113118434A (en) * | 2021-03-31 | 2021-07-16 | 上海连纵轨道交通科技有限公司 | Brake pad of high-speed motor train unit and preparation method thereof |
| CN114833339A (en) * | 2022-05-06 | 2022-08-02 | 中国铁道科学研究院集团有限公司 | High-temperature-resistant powder metallurgy friction material and temperature-resistant brake pad as well as preparation method and application thereof |
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| CN113118434A (en) * | 2021-03-31 | 2021-07-16 | 上海连纵轨道交通科技有限公司 | Brake pad of high-speed motor train unit and preparation method thereof |
| CN113118434B (en) * | 2021-03-31 | 2021-12-17 | 上海连纵轨道交通科技有限公司 | Brake pad of high-speed motor train unit and preparation method thereof |
| CN114833339A (en) * | 2022-05-06 | 2022-08-02 | 中国铁道科学研究院集团有限公司 | High-temperature-resistant powder metallurgy friction material and temperature-resistant brake pad as well as preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN106238722B (en) | 2018-05-11 |
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