CN115596789A - Organic synthetic friction material, organic synthetic brake pad and preparation method thereof - Google Patents
Organic synthetic friction material, organic synthetic brake pad and preparation method thereof Download PDFInfo
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- 239000002783 friction material Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 66
- 239000002893 slag Substances 0.000 claims abstract description 56
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 239000000945 filler Substances 0.000 claims abstract description 15
- 239000012779 reinforcing material Substances 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 28
- 239000000835 fiber Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- 229910001018 Cast iron Inorganic materials 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000004073 vulcanization Methods 0.000 claims description 14
- 239000010456 wollastonite Substances 0.000 claims description 14
- 229910052882 wollastonite Inorganic materials 0.000 claims description 14
- 239000004113 Sepiolite Substances 0.000 claims description 13
- 239000002008 calcined petroleum coke Substances 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 13
- 229910052624 sepiolite Inorganic materials 0.000 claims description 13
- 235000019355 sepiolite Nutrition 0.000 claims description 13
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000011325 microbead Substances 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 238000005562 fading Methods 0.000 abstract description 3
- 239000000395 magnesium oxide Substances 0.000 description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000011534 incubation Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
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- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
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
- F16D69/025—Compositions based on an organic binder
-
- 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
- C09K3/149—Antislip compositions
-
- 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
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0056—Elastomers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an organic synthetic friction material, an organic synthetic brake pad and a preparation method thereof, and relates to the technical field of rail transit braking. The organic synthetic friction material comprises the following components in percentage by volume: 30.5-58% of a binder, 9-24% of a reinforcing material and 25-56% of a filler, wherein the filler comprises blast furnace slag powder. According to the invention, a certain amount of blast furnace slag powder is added into the organic synthetic friction material, and the blast furnace slag powder can act together with the binder and the reinforcing material, so that not only can the friction coefficient be adjusted, but also the heat fading phenomenon can be reduced. The friction material is matched with other components for use together, so that the friction performance of the friction material is improved.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to an organic synthetic friction material, an organic synthetic brake lining and a preparation method thereof.
Background
The friction material of the organic synthetic brake pad mainly comprises three parts of a binder, a reinforcing material and a filler. The adhesive mainly comprises resin and rubber, the reinforcing material mainly comprises fiber materials, and the filler has the effects of regulating the frictional wear performance, reducing the cost and the like.
Blast furnace slag is a solid waste produced in a blast furnace ironmaking process, and mainly exists in the form of silicate minerals of various oxides. Blast furnace slag, as an industrial byproduct, has been developed and utilized in various fields such as building materials, road engineering, heat insulating materials, etc., but there are few reports in the field of friction materials.
Disclosure of Invention
The invention aims to provide an organic synthetic friction material, an organic synthetic brake pad and a preparation method thereof, which are used for further reducing the cost of the organic synthetic brake pad, further adjusting the friction coefficient and achieving the effect of stabilizing the friction coefficient.
In order to achieve the above purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides an organic synthetic friction material comprising, in volume percent: 30.5-58% of a binder, 9-24% of a reinforcing material and 25-56% of a filler, wherein the filler comprises blast furnace slag powder.
Compared with the prior art, by adopting the technical scheme, the blast furnace slag powder is an industrial byproduct with low cost, and a certain amount of the blast furnace slag powder is added into the organic synthetic friction material and can act together with the binder and the reinforcing material, so that the friction coefficient can be adjusted, and the heat fading phenomenon can be reduced. In addition, because the blast furnace slag powder has certain activity and larger specific surface area, the blast furnace slag powder can adsorb micromolecular gas generated by decomposing the binder material at high temperature, and relieve the formation of an air cushion layer, thereby achieving the effect of stabilizing the friction coefficient and improving the friction performance of the organic synthetic friction material.
Further, the binder comprises the following components in percentage by volume of the organic synthetic friction material: 20 to 30 percent of phenolic resin, 10 to 25 percent of styrene-butadiene rubber and 0.5 to 3 percent of vulcanization accelerator; and/or the presence of a gas in the gas,
the reinforcing material comprises the following components in percentage by volume of the organic synthetic friction material: 5-10% of steel fiber, 2-8% of sepiolite fiber and 2-6% of needle-shaped wollastonite.
Furthermore, the filler also comprises one or more of calcined petroleum coke, cast iron powder, friction powder, barium sulfate and ceramic microspheres; and/or the presence of a gas in the gas,
the filler comprises the following components in percentage by volume of the organic synthetic friction material: 2-10% of blast furnace slag powder, 8-14% of calcined petroleum coke, 2-6% of cast iron powder, 4-8% of friction powder, 5-10% of barium sulfate and 4-8% of ceramic microbeads.
Further, the organic synthetic friction material comprises the following components in percentage by volume: 22 to 28 percent of phenolic resin, 16 to 22 percent of styrene-butadiene rubber, 5 to 8 percent of steel fiber, 3 to 6 percent of sepiolite fiber, 8 to 12 percent of calcined petroleum coke, 2 to 5 percent of needle-shaped wollastonite, 3 to 6 percent of cast iron powder, 4 to 8 percent of blast furnace slag powder, 5 to 7 percent of friction powder, 6 to 9 percent of barium sulfate, 5 to 7 percent of ceramic micro-bead and 1 to 2 percent of vulcanization accelerator.
Further, the blast furnace slag powder is selected from blast furnace slag powder with the granularity of 200 meshes-1000 meshes; and/or the blast furnace slag powder comprises the following main components in percentage by mass: 38 to 42 percent of CaO and SiO 2 :30-34％、Al 2 O 3 10-14 percent of MgO, 8-12 percent of MgO and the balance of others.
Further, the vulcanization accelerator is one or more of TMTD, CZ and BIPB.
In a second aspect, the invention also provides an organic synthetic brake pad, which comprises a steel backing and the organic synthetic friction material.
Compared with the prior art, the organic synthetic brake pad has the same beneficial effects as the organic synthetic friction material, and is not repeated herein.
In a third aspect, the present invention further provides a method for preparing an organic synthetic brake pad, which is applied to the organic synthetic brake pad, and comprises the following steps:
pressurizing and banburying the raw materials for 10-20 min, and discharging the materials after banburying to obtain a mixture;
cooling the mixture to 40-50 ℃, crushing and passing through a screen with the diameter of 3 mm;
pressing and forming the crushed mixture and the steel backing to prepare a pressed blank;
and heating and curing the pressed blank at the temperature of between room temperature and 220 ℃ for 6 to 24 hours, and naturally cooling to room temperature after heat treatment to obtain the organic synthetic brake pad.
Compared with the prior art, the preparation method of the organic synthetic brake pad has the same beneficial effects as the organic synthetic friction material, and is not repeated herein.
Further, the temperature is controlled to be 75-85 ℃ in the banburying process.
Further, in the pressing process, the pressing pressure is 4000N/cm 2 ～6000N/cm 2 The pressing time is 20 s-120 s.
Drawings
FIG. 1 is a graph of the instantaneous coefficient of friction of example 1;
fig. 2 is a graph of instantaneous coefficient of friction of comparative example 1.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides an organic synthetic friction material, which comprises the following components in percentage by volume: 30.5-58% of a binder, 9-24% of a reinforcing material and 25-56% of a filler, wherein the filler comprises blast furnace slag powder.
Compared with the prior art, by adopting the technical scheme, the blast furnace slag powder is an industrial byproduct with low cost, and a certain amount of the blast furnace slag powder is added into the organic synthetic friction material and can act together with the binder and the reinforcing material, so that the cost of the organic synthetic friction material can be reduced, the friction coefficient can be adjusted, and the heat fading phenomenon of the friction material can be reduced. And thirdly, as the blast furnace slag powder has certain activity and larger specific surface area, the blast furnace slag powder can adsorb micromolecular gas generated by decomposing the binder material at high temperature, and relieve the formation of an air cushion layer, thereby achieving the effect of stabilizing the friction coefficient.
In the above embodiment, the composition of the binder may include phenolic resin, styrene-butadiene rubber, and a vulcanization accelerator. Specifically, the phenolic resin accounts for 20-30% of the volume of the organic synthetic friction material, the styrene butadiene rubber accounts for 10-25% of the volume of the organic synthetic friction material, and the vulcanization accelerator accounts for 0.5-3% of the volume of the organic synthetic friction material. Furthermore, based on the volume percentage of the organic synthetic friction material, the phenolic resin can be further selected from 22% to 28%, the styrene-butadiene rubber can be further selected from 16% to 22%, and the vulcanization accelerator can be further selected from 1% to 2%. It is understood that in particular embodiments, the phenolic resin may be 20%, 22%, 25%, 28%, or 30% by volume of the organic synthetic friction material. The styrene butadiene rubber may be 10%, 16%, 20%, 22% or 25%. The vulcanization accelerator may be 0.5%, 1%, 2% or 3%.
Illustratively, in the above embodiments, the reinforcing material comprises the following components: any one or more of steel fiber, sepiolite fiber and needle-shaped wollastonite. Specifically, based on the volume percentage of the organic synthetic friction material, the steel fiber accounts for 5-10% of the volume percentage of the organic synthetic friction material, the sepiolite fiber accounts for 2-8% of the volume percentage of the organic synthetic friction material, and the needle-shaped wollastonite accounts for 2-6% of the volume percentage of the organic synthetic friction material. Further, the steel fiber can be further selected from 5-8%, the sepiolite fiber can be further selected from 3-6%, and the needle-shaped wollastonite can be further selected from 2-5% in percentage by volume of the organic synthetic friction material. It is understood that in particular embodiments, the steel fibers may be selected to be 5%, 6%, 8%, or 10% by volume of the organic synthetic friction material. The sepiolite fiber can be selected from 2%, 3%, 5%, 6% or 8%. The needle-shaped wollastonite may be selected from 2%, 3% or 5%.
In the above embodiments, the filler may further include any one or more of calcined petroleum coke, cast iron powder, friction powder, barium sulfate, and ceramic beads on the basis of the blast furnace slag powder. The volume percentage of the organic synthetic friction material is that the blast furnace slag powder accounts for 2-10% of the volume percentage of the organic synthetic friction material, the calcined petroleum coke accounts for 8-14% of the volume percentage of the organic synthetic friction material, the cast iron powder accounts for 2-6% of the volume percentage of the organic synthetic friction material, the friction powder accounts for 4-8% of the volume percentage of the organic synthetic friction material, the barium sulfate accounts for 5-10% of the volume percentage of the organic synthetic friction material, and the ceramic microspheres account for 4-8% of the volume percentage of the organic synthetic friction material.
Further, by volume percentage of the organic synthetic friction material, the blast furnace slag powder can be further selected to be 4% -8%, the calcined petroleum coke can be further selected to be 8% -12%, the cast iron powder can be further selected to be 3% -6%, the friction powder can be further selected to be 5% -7%, the barium sulfate can be further selected to be 6% -9%, and the ceramic micro-beads can be further selected to be 5% -7%.
It is to be understood that in particular embodiments, the blast furnace slag powder may be selected to be 2%, 4%, 6%, 8%, or 10%, the calcined petroleum coke may be selected to be 8%, 10%, 12%, 13%, or 14%, the cast iron powder may be selected to be 2%, 3%, 4%, or 6%, the friction powder may be selected to be 4%, 5%, 6%, 7%, or 8%, the barium sulfate may be selected to be 5%, 6%, 8%, 9%, or 10%, and the ceramic beads may be selected to be 4%, 5%, 6%, 7%, or 8% by volume of the organic synthetic friction material.
In the embodiment, the styrene-butadiene rubber and the phenolic resin are used as the binder, and the addition of the styrene-butadiene rubber can overcome the defect of high rigidity of pure resin and improve the impact resistance of the friction material. The steel fiber, the sepiolite fiber and the needle-shaped wollastonite act together, so that the brittleness of the needle-shaped wollastonite can be improved, and the toughness of the friction material can be improved. The barium sulfate and the friction powder have the function of stabilizing the friction coefficient, and the friction coefficient can be adjusted by calcining the petroleum coke and the cast iron powder. The vulcanization accelerator can polymerize the linear macromolecular material into a net structure, and the physical and mechanical properties of the friction material are improved. The addition of the blast furnace slag powder can adsorb micromolecular gas generated by decomposition of the binder material at high temperature, relieve the formation of an air cushion layer and further achieve the effect of stabilizing the friction coefficient under the high-temperature condition, and on the other hand, the blast furnace slag powder is used as mineral slag, can adjust the manufacturing cost of the brake lining and improve the recycling economic benefit.
It should be understood that, in the above embodiment, the blast furnace slag powder may be selected to have a certain particle size, for example, the particle size is selected to be 200 mesh to 1000 mesh, so as to ensure that the blast furnace slag powder has a suitable specific surface area and a suitable activity, and further ensure that the blast furnace slag powder has an optimal ability to adsorb small molecule gas generated by decomposition of the binder material at a high temperature. It is also understood that the components of the blast furnace slag powder may include calcium oxide, silicon oxide, aluminum oxide, and magnesium oxide. And the blast furnace slag powder comprises the following main components in percentage by mass: 38 to 42 percent of CaO and SiO 2 :30-34％、Al 2 O 3 10-14 percent of MgO, 8-12 percent of MgO and the balance of others. It is understood that the margin may include CaF 2 、TiO 2 And BaO, etc. And/or, the blast furnace slag powder can also be selected to be alkalescent blast furnace slag powder, and the alkalescent blast furnace slag powder can also prevent steel fibers from rusting, so that the service life of the product is prolonged, and the safety of the product is improved.
Further, in the above embodiments, the vulcanization accelerator may be one or more of TMTD, CZ, BIPB.
In a second aspect, the invention also provides an organic synthetic brake pad, which comprises a steel backing and the organic synthetic friction material.
Compared with the prior art, the organic synthetic brake pad has the same beneficial effects as the organic synthetic friction material in the technical scheme, and the organic synthetic friction material is not described in detail herein.
In a third aspect, the present invention further provides a method for preparing an organic synthetic brake pad, which is applied to the organic synthetic brake pad, and comprises the following steps:
pressurizing and banburying the raw materials for 10-20 min, and discharging the materials after banburying to obtain a mixture;
cooling the mixture to 40-50 ℃, crushing and passing through a sieve with the diameter of 3 mm;
then pressing and forming the crushed mixture and the steel backing to prepare a pressed blank;
and heating and curing the pressed blank at the temperature of between room temperature and 220 ℃ for 6 to 24 hours, and naturally cooling to room temperature after heat treatment to obtain the organic synthetic brake pad.
Compared with the prior art, the preparation method of the organic synthetic brake pad has the same beneficial effects as the organic synthetic friction material in the technical scheme, and the details are not repeated here.
Furthermore, the temperature is controlled to be 75-85 ℃ in the banburying process.
Further, in the pressing process, the pressing pressure is 4000N/cm 2 ～6000N/cm 2 The pressing time is 20 s-120 s.
For better understanding of the present invention, the following examples are given for further illustration of the present invention, but the present invention is not limited to the following examples.
The test methods used in the following examples are all conventional methods unless otherwise specified; the equipment, raw materials and the like used in the following examples are commercially available unless otherwise specified. Wherein:
example 1
The embodiment of the invention provides an organic synthetic brake pad, which comprises a steel backing and an organic synthetic friction material, wherein the organic synthetic friction material comprises the following components in percentage by volume: 25% of phenolic resin, 20% of styrene-butadiene rubber, 1% of vulcanization accelerator, 6% of steel fiber, 5% of sepiolite fiber, 3% of needle-like wollastonite, 6% of blast furnace slag powder, 10% of calcined petroleum coke, 4% of cast iron powder, 6% of friction powder, 8% of barium sulfate and 6% of ceramic microbead. The blast furnace slag powder comprises the following components in percentage by mass: 42% of CaO and SiO 2 :30％、Al 2 O 3 12 percent of MgO, and the balance of others.
In this embodiment, the method for preparing the organic synthetic brake pad includes the following steps:
and S1, accurately weighing the raw materials, adding the raw materials into an internal mixer step by step, carrying out pressure internal mixing for 10min, and discharging the materials after the internal mixing is finished to obtain a mixture. In the banburying process, circulating cooling water is started at proper time, and in the embodiment, the highest temperature in the process is controlled to be 80 ℃.
And S2, airing the mixture to 50 ℃ at normal temperature, crushing the mixture by using a crusher, and passing the crushed mixture through a screen with the diameter of 3mm to obtain undersize.
S3, adding the steel backing coated with the steel backing adhesive and the undersize product into a die cavity for pressing, wherein the pressing pressure is 5000N/cm 2 And pressing for 60s to obtain a pressed blank.
And S4, putting the pressed blank into an electric heating air blast drying box, carrying out heat treatment according to the temperature gradient in the table 1, and cooling after 6 hours of heat treatment to obtain the organic synthetic brake pad added with the blast furnace slag powder.
| Temperature (. Degree.C.) | Time of temperature rise (h) | Incubation time (h) |
| Room temperature-130 deg.C | 1 | 1 |
| 130—160 | 1 | 2 |
| 160—200 | 1 | 4 |
Example 2
The embodiment of the invention provides an organic synthetic brake pad, which comprises a steel backing and an organic synthetic friction material, wherein the organic synthetic friction material comprises the following components in percentage by volume: 22% of phenolic resin, 22% of butadiene styrene rubber, 2% of vulcanization accelerator, 5% of steel fiber, 6% of sepiolite fiber, 5% of needle-shaped wollastonite, 4% of blast furnace slag powder, 12% of calcined petroleum coke, 3% of cast iron powder, 5% of friction powder, 9% of barium sulfate and 5% of ceramic microbead. The blast furnace slag powder comprises the following components in percentage by mass: 38% of CaO and SiO 2 :34％、Al 2 O 3 10 percent of MgO, 12 percent of MgO and the balance of others.
In this embodiment, the method for preparing the organic synthetic brake pad includes the following steps:
and S1, accurately weighing the raw materials, adding the raw materials into an internal mixer step by step, carrying out pressure internal mixing for 20min, and discharging the materials after the internal mixing is finished to obtain a mixture. The circulating cooling water is started in time in the banburying process, and in the embodiment, the highest temperature in the process is controlled to be 85 ℃.
And S2, airing the mixture to 40 ℃ at normal temperature, crushing the mixture by using a crusher, and passing the crushed mixture through a screen with the diameter of 3mm to obtain undersize.
S3, adding the steel backing coated with the steel backing adhesive and the undersize into a die cavity for pressing, wherein the pressing pressure is 4000N/cm 2 And the pressing time is 120s, and a pressed blank is prepared.
And S4, putting the pressed blank into an electric heating air blast drying box, carrying out heat treatment according to the temperature gradient in the table 2, and cooling after 11 hours of heat treatment to obtain the organic synthetic brake pad added with the blast furnace slag powder.
TABLE 2 temp. gradiometer
| Temperature (. Degree.C.) | Time of temperature rise (h) | Incubation time (h) |
| Room temperature-150 deg.C | 1 | 2 |
| 150—180 | 2 | 2 |
| 180—220 | 2 | 2 |
Example 3
The embodiment of the invention provides an organic synthetic brake pad, which comprises a steel backing and an organic synthetic friction material, wherein the organic synthetic friction material comprises the following components in percentage by volume: 28% of phenolic resin, 16% of styrene butadiene rubber and sulfur1% of chemical accelerator, 8% of steel fiber, 3% of sepiolite fiber, 2% of needle-like wollastonite, 8% of blast furnace slag powder, 8% of calcined petroleum coke, 6% of cast iron powder, 7% of friction powder, 6% of barium sulfate and 7% of ceramic microbead. The blast furnace slag powder comprises the following components in percentage by mass: caO 40%, siO 2 :32％、Al 2 O 3 14% of MgO, 8% of MgO and the balance of others.
In this embodiment, the method for preparing the organic synthetic brake pad includes the following steps:
and S1, accurately weighing the raw materials, adding the raw materials into an internal mixer step by step, carrying out pressure internal mixing for 15min, and discharging the materials after the internal mixing is finished to obtain a mixture. The circulating cooling water is started in time in the banburying process, and in the embodiment, the highest temperature in the process is controlled to be 75 ℃.
And S2, airing the mixture to 50 ℃ at normal temperature, crushing the mixture by using a crusher, and passing the crushed mixture through a screen with the diameter of 3mm to obtain undersize.
S3, adding the steel backing coated with the steel backing adhesive and the undersize into a die cavity for pressing, wherein the pressing pressure is 6000N/cm 2 And the pressing time is 20s, and a pressed blank is prepared.
And S4, putting the pressed blank into an electric heating air blast drying box, carrying out heat treatment according to the temperature gradient in the table 3, and cooling after 6 hours of heat treatment to obtain the organic synthetic brake pad added with the blast furnace slag powder.
TABLE 3 temp. gradiometer
| Temperature (. Degree.C.) | Time of temperature rise (h) | Incubation time (h) |
| Room temperature-160 deg.C | 2 | 4 |
| 160—180 | 3 | 4 |
| 180—220 | 5 | 6 |
The preparation methods of examples 4 to 5 are different from the basic preparation method of example 1 in the formulation ratio. The composition of the organic synthetic friction material of examples 4 to 5 is shown in Table 4.
Table 4 formulation ratio table of examples 4 to 5
Comparative example 1
Comparative example 1 is different from example 1 in that the blast furnace slag powder in example 1 was replaced with calcium carbonate in equal amount and the other components were not changed.
Performance test
The average friction coefficient and the instantaneous friction coefficient curves of the brake pad products of examples 1 to 5 and comparative example 1 are also measured by the present invention. The experimental conditions were: shrinkage test inertia 13.40kgm 2 The reduction ratio friction radius is 125mm, and the reduction ratio friction area is 15cm 2 *2, the test speed is 40km/h (849 r/min), 60km/h (1323 r/min), 80km/h (1751 r/min) and 90km/h (1962 r/min), and the test pressure is 0.68MPa after 2 times of repeated tests. The average coefficient of friction was measured as follows:
as can be seen from the above table, the average friction coefficient of examples 1 to 5 is less attenuated, whereas the average friction coefficient of comparative example 1 is greater attenuated, at the same braking force and different rotation speeds. The friction material added with the blast furnace slag powder can play a certain role in stabilizing the friction coefficient.
The instantaneous coefficient of friction curves of example 1 and comparative example 1 were tested, and the test results of example 1 are shown in fig. 1, and the test results of comparative example 1 are shown in fig. 2. As can be seen from the instantaneous friction coefficient graph of example 1, example 1 to which the blast furnace slag powder was added was more stable in instantaneous friction coefficient and less attenuated in friction coefficient at high speed than comparative example 1 to which calcium carbonate was added. And the cost of the blast furnace slag is only 1/3 of that of calcium carbonate.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An organic synthetic friction material comprising, in volume percent: 30.5-58% of a binder, 9-24% of a reinforcing material and 25-56% of a filler, wherein the filler comprises blast furnace slag powder.
2. The organic synthetic friction material of claim 1 wherein said binder comprises the following composition in volume percent of said organic synthetic friction material: 20 to 30 percent of phenolic resin, 10 to 25 percent of butadiene styrene rubber and 0.5 to 3 percent of vulcanization accelerator.
3. The organic synthetic friction material of claim 1 wherein the reinforcing material comprises any one or more of steel fibers, sepiolite fibers, acicular wollastonite; and/or the presence of a gas in the gas,
the filler also comprises any one or more of calcined petroleum coke, cast iron powder, friction powder, barium sulfate and ceramic microbeads.
4. The organic synthetic friction material according to any one of claims 1 to 3 wherein the reinforcing material comprises the following components in percentage by volume of the organic synthetic friction material: 5-10% of steel fiber, 2-8% of sepiolite fiber and 2-6% of needle-shaped wollastonite; and/or the presence of a gas in the gas,
the filler comprises the following components in percentage by volume of the organic synthetic friction material: 2-10% of blast furnace slag powder, 8-14% of calcined petroleum coke, 2-6% of cast iron powder, 4-8% of friction powder, 5-10% of barium sulfate and 4-8% of ceramic microbeads.
5. The organic synthetic friction material according to any one of claims 1 to 4, consisting of, in volume percent of the organic synthetic friction material: 22 to 28 percent of phenolic resin, 16 to 22 percent of styrene-butadiene rubber, 5 to 8 percent of steel fiber, 3 to 6 percent of sepiolite fiber, 8 to 12 percent of calcined petroleum coke, 2 to 5 percent of needle-shaped wollastonite, 3 to 6 percent of cast iron powder, 4 to 8 percent of blast furnace slag powder, 5 to 7 percent of friction powder, 6 to 9 percent of barium sulfate, 5 to 7 percent of ceramic micro-bead and 1 to 2 percent of vulcanization accelerator.
6. The organic synthetic friction material according to any one of claims 1 to 5, wherein the blast furnace slag powder is selected from blast furnace slag powders having a particle size of 200 mesh to 1000 mesh; and/or the blast furnace slag powder is alkalescent blast furnace slag powder; and/or the blast furnace slag powder comprises the following main components in percentage by mass: 38 to 42 percent of CaO and SiO 2 :30-34％、Al 2 O 3 10-14 percent of MgO, 8-12 percent of MgO and the balance of others.
7. The organic synthetic friction material according to any one of claims 1 to 6, wherein the vulcanization accelerator is one or more of TMTD, CZ, BIPB.
8. An organic synthetic brake pad comprising a steel backing and the organic synthetic friction material of any one of claims 1 to 7.
9. A method for preparing an organic synthetic brake pad, which is applied to the organic synthetic brake pad of claim 8, comprising the following steps:
pressurizing and banburying the raw materials according to the formula ratio for 10-20 min, and discharging the materials after banburying is finished to obtain a mixture;
cooling the mixture to 40-50 ℃, crushing and passing through a sieve with the diameter of 3 mm;
then pressing and forming the crushed mixture and the steel backing to prepare a pressed blank;
and heating and curing the pressed blank at the temperature of between room temperature and 220 ℃ for 6 to 24 hours, and naturally cooling to room temperature after heat treatment to obtain the organic synthetic brake pad.
10. The method for preparing the organic synthetic brake pad according to claim 9, wherein the temperature is controlled to be 75-85 ℃ during the banburying process;
in the pressing process, the pressing pressure is 4000N/cm < 2 > -6000N/cm < 2 >, and the pressing time is 20 s-120 s.
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