CN108518433A - A kind of preparation method of modified silicon carbide group automobile brake block - Google Patents
A kind of preparation method of modified silicon carbide group automobile brake block Download PDFInfo
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- CN108518433A CN108518433A CN201810274670.0A CN201810274670A CN108518433A CN 108518433 A CN108518433 A CN 108518433A CN 201810274670 A CN201810274670 A CN 201810274670A CN 108518433 A CN108518433 A CN 108518433A
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- Prior art keywords
- silicon carbide
- brake block
- temperature
- mixed
- modified
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 33
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 26
- 241000196324 Embryophyta Species 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 239000005011 phenolic resin Substances 0.000 claims abstract description 14
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 244000226021 Anacardium occidentale Species 0.000 claims abstract description 12
- 235000020226 cashew nut Nutrition 0.000 claims abstract description 12
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 12
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 32
- 238000007599 discharging Methods 0.000 claims description 29
- 238000003756 stirring Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000000227 grinding Methods 0.000 claims description 18
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001354 calcination Methods 0.000 claims description 14
- 239000011812 mixed powder Substances 0.000 claims description 14
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000002137 ultrasound extraction Methods 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 239000002274 desiccant Substances 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229930006000 Sucrose Natural products 0.000 claims description 8
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000004312 hexamethylene tetramine Substances 0.000 claims description 8
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 8
- 239000005720 sucrose Substances 0.000 claims description 8
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 240000002853 Nelumbo nucifera Species 0.000 claims description 6
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 6
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 238000005292 vacuum distillation Methods 0.000 claims description 6
- 239000003643 water by type Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 150000002432 hydroperoxides Chemical class 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- RZYKUPXRYIOEME-UHFFFAOYSA-N CCCCCCCCCCCC[S] Chemical compound CCCCCCCCCCCC[S] RZYKUPXRYIOEME-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 abstract description 2
- 230000009257 reactivity Effects 0.000 abstract description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 description 8
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 8
- 229910052895 riebeckite Inorganic materials 0.000 description 8
- 238000012360 testing method Methods 0.000 description 5
- 239000002783 friction material Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 125000005909 ethyl alcohol group Chemical group 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- -1 copolycondensation Chemical compound 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to brake block preparing technical fields, and in particular to a kind of preparation method of modified silicon carbide group automobile brake block.The present invention is using phenolic resin as base material, modified self-control silicon carbide powder is as modifying agent, and it is aided with molybdenum disulfide, the preparations such as dicumyl peroxide are modified silicon carbide group automobile brake block, phenolic resin is modified first with acrylonitrile-butadiene rubber powder and cashew nut shell oil, so that the wearability and heat-resisting quantity of automotive brake pads are improved, cashew nut shell oil can be chemically reacted with base material, form the fine and close network structure of crosslinking, the heat-resisting quantity for being conducive to automotive brake pads is improved, molybdenum disulfide can form rough layer in substrate surface, improve substrate surface frictional force and hysteresis effect, and contain multiple conjugate double bond systems in plant extraction liquid, enhance the reactivity of base material, further increase the heat-resisting quantity and wearability of automotive brake pads, it is with a wide range of applications.
Description
Technical field
The present invention relates to brake block preparing technical fields, and in particular to a kind of preparation of modified silicon carbide group automobile brake block
Method.
Background technology
Currently, the pursuit with people to Modern Live quality, automobile becomes essential life in family life
Articles for use, car largely enter common people house, and the properties especially braking ability of car just becomes society and generally closes
The problem of heart, because brake pad of car is the critical component in automobile brake, the quality for the piece performance that brakes is directly related to vapour
Vehicle reliability of operation, stability and safety.
Brake block is made of steel plate, bonding thermal insulation layer and brake pad.Brake pad is made of friction material and adhesive, brake
When brake pad be compressed on brake disc or brake rim and generate friction with it, to achieve the purpose that enable vehicle deceleration to brake.Thing
In reality, brake block quality is weighed mainly from following four aspect：First, friction coefficient, friction coefficient determines basic brake
Vehicle piece braking moment, the too high wheel lock up that can be caused in braking process, direction out of control and burning piece, too low then braking distance mistake
It is long；Second, safety, brake block will produce TRANSIENT HIGH TEMPERATURE in braking, especially when running at high speed or emergency braking, high temperature shape
Under state, friction plate friction coefficient can decline；Third, if it is comfortable, including brake feel, noise, dust, smolder, peculiar smell etc., it is
The direct embodiment of frictional behaviour；4th, service life, usual brake block can guarantee 30,000 kilometers of service life.
The brake block for being presently used for car brake mainly has following three kinds：Asbestos base brake block, semimetal base brake block and
Few Metal Substrate brake block.The friction material of asbestos base brake block mainly based on asbestos fibre, brakes using made of asbestos
In piece, asbestos brake lining can discharge toxic gas, and asbestos brake lining in the case where brake temperature reaches 1000 degree or more
During long-term use, because asbestos itself have carcinogenesis, there is also potential safety problems.In addition, asbestos base
Brake block heat is lost seriously, and the braking of car high-speed cruising is not suitable with.Semi-metallic brake pad mainly by steel fibre as framework material,
Phenolic resin adds the multi-element composite material composition of various functions filler as adhesive, iron powder as anti-wear agent.Half
During the use of metal brake block friction material, it is not only susceptible to damage brake block, brake block and brake disc（Drum）Occur
The situation that rust is viscous, brake block frictional behaviour is unstable, to the problem for causing frictional behaviour not excellent enough, and is susceptible to
High-temperature stability is deteriorated and becomes sensitive situation to temperature change, to the problem for causing thermal stability inadequate.Few Metal Substrate is stopped
The friction material of vehicle piece is that a small amount of steel fibre adds mineral fibres to be matrix, various functions filler is added, then add phenolic resin
Multi-element composite material as binder forms, the disadvantage is that：Abrasion is big, and the service life of product is short, brake noise easily occurs,
The wheel of car is easily shaken when high speed is braked, to seriously affect the comfort of vehicle braking.
It would therefore be highly desirable to prepare a kind of good frictional behaviour, low wear rate, the automobile that brake noise is small, environmental pollution is low
Brake block.
Invention content
The technical problems to be solved by the invention：Exist for common automotive brake pads at present and wears no resistance and heat-resisting quantity
Difference can not meet the defect of market demands, provide a kind of preparation method of modified silicon carbide group automobile brake block.
In order to solve the above technical problems, the present invention is using technical solution as described below：
A kind of preparation method of modified silicon carbide group automobile brake block, it is characterised in that specifically preparation process is：
（1）It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 16~20min, obtains mixed powder
End, then be 5 in mass ratio：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 10~12min under conditions of 160~200r/min, obtains phenol-formaldehyde resin modified；
（2）Sucrose, deionized water and sodium metasilicate are mixed to be placed in beaker and are mixed, obtains stirring liquid, then into stirring liquid
The hydrochloric acid of stirring liquid quality 0.5% is added, continues that reaction is mixed, obtains reaction solution, reaction solution and concentrated sulfuric acid solution are mixed
It is stirred to react, dry discharging obtains desiccant gel；
（3）Desiccant gel is placed under the protection of argon gas, with the rate heat temperature raising of 2~4 DEG C/min, constant temperature processing is naturally cold
But to room temperature, it is placed in high-temperature roasting kiln roasting, obtains calcining matter, with hydrofluoric acid dips calcining matter, grinding discharging is to get certainly
Preparing silicon carbide powder；
（4）It weighs the mixing of 11~13g lotus leaves to be placed in the beaker with 50~65mL deionized waters, and beaker is placed in ultrasonic wave
Ultrasonic extraction in shaker, filtering removal filter residue, collects filtrate, filtrate is evaporated under reduced pressure, cooling discharging, obtains self-control and plants
Self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid are mixed after impregnating, are separated by filtration by object extracting solution
To filter residue, filter residue is placed in and is dried at room temperature, grinding discharging obtains modified self-control silicon carbide powder；
（5）Count in parts by weight, weigh respectively 32~40 parts of phenol-formaldehyde resin modifieds, 12~16 parts of modified self-control silicon carbide powders and
4~6 parts of molybdenum disulfide mixing are placed in blender and stir, then add 2~4 parts of cumyl hydroperoxides, 1~3 part of stearic acid and 1
~3 parts of absolute ethyl alcohols continue to keep rotating speed stirring, obtain mixture, mixture is placed in brake block die, be placed in compacting
It is press-formed in machine, after taking out molded product, cooled to room temperature is finally placed in heat treatment box and is heat-treated, cooling discharging, i.e.,
Silicon carbide group automobile brake block must be modified.
Step（1）The mass ratio of the phenolic resin and hexamethylenetetramine is 3：1, grind the time be 16~
The mass ratio of 20min, mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil are 5：1：2, it is 160~200r/ to be stirred to react rotating speed
Min, it is 10~12min to be stirred to react the time.
Step（2）The mass ratio of the sucrose, deionized water and sodium metasilicate is 1：6：3, mixing time be 12~
16min, the mass fraction of hydrochloric acid are 20%, and it is 6~8min to continue to be stirred to react the time, reaction solution and mass fraction be 98% it is dense
The mass ratio of sulfuric acid solution is 8：1, it is 10~12min to be stirred to react the time.
Step（3）The heat temperature raising temperature is 1000~1150 DEG C, and constant temperature processing time is 2~4h, calcination temperature
It it is 650~700 DEG C, roasting time is 1~3h, and the mass fraction of hydrofluoric acid is 32%, and soaking time is 1~2 day.
Step（4）The ultrasonic extraction temperature is 60~65 DEG C, and ultrasonic extraction power is 160~180W, ultrasonic extraction
Frequency be 24~32kHz, the ultrasonic extraction time be 35~45min, the vacuum distillation time be 6~8min, make by oneself silicon carbide powder,
The mass ratio of lauryl sodium sulfate and self-control plant extraction liquid is 2：1：5, soaking time is 35~45min, drying time 3
~5 days.
Step（5）The speed of agitator is 120~160r/min, and mixing time is 10~12min, continues mixing time
For 24~32min, extrusion forming temperature is 160~180 DEG C, and extrusion forming pressure is 32~40MPa, heat treatment temperature 175
~185 DEG C, heat treatment time is 2~4h.
Compared with other methods, advantageous effects are the present invention：
For the present invention using phenolic resin as base material, modified self-control silicon carbide powder is aided with molybdenum disulfide, peroxidating as modifying agent
The preparations such as hydrogen isopropylbenzene are modified silicon carbide group automobile brake block, first with acrylonitrile-butadiene rubber powder and cashew nut shell oil to phenolic resin into
Row is dual modified, and wherein acrylonitrile-butadiene rubber powder has higher wearability and preferable heat resistance, under the action of molybdenum disulfide, easily
In the protective film for forming antiwear heat resisting in substrate surface so that the wearability and heat-resisting quantity of automotive brake pads are improved, together
When due on phenolic resin structure phenolic hydroxyl group and methylene be easy oxidation, cause its heat resistance to be affected, and cashew nut shell oil
As the derivative of phenol, it can be chemically reacted with base material, formed the fine and close network structure of crosslinking, blocked ambient temperature
Intrusion, the heat-resisting quantity for being conducive to automotive brake pads is improved, in addition in high temperature system, with the increasing of molybdenum disulfide dosage
Add, the molybdenum disulphide particles for playing increasing mill between flour milling increase, and the interface shear strength between base material and mill part is bigger, abrasion
Smaller, molybdenum disulfide can form rough layer in substrate surface, substrate surface frictional force and hysteresis effect be improved, to make base material
Friction coefficient significantly improves, and improves the wearability of automotive brake pads again, continues using sodium metasilicate as silicon source, using sucrose as carbon forerunner
Body recycles the plant extraction liquid containing polar group to carry out silicon carbide through the processes synthesizing silicon carbide such as copolycondensation, heat treatment
Modified, it is in polarity to make silicon carbide, substrate surface is dispersed in, to improve the phase of nonpolar silicon carbide and polar substrates
Capacitive, wherein silicon carbide have wearability, the characteristic of heat-resisting quantity, and contain multiple conjugate double bond systems in plant extraction liquid,
With the stronger ability for providing electronics pair the resistance to of automotive brake pads is further increased to enhance the reactivity of base material
High temperatures and wearability, is with a wide range of applications.
Specific implementation mode
It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 16~20min, obtains mixed powder
End, then be 5 in mass ratio：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 10~12min under conditions of 160~200r/min, obtains phenol-formaldehyde resin modified；It is 1 in mass ratio：6：3 by sugarcane
Sugared, deionized water and sodium metasilicate mixing are placed in 12~16min of mixing in beaker, obtain stirring liquid, then add into stirring liquid
Enter to stir the hydrochloric acid that the mass fraction of liquid quality 0.5% is 20%, continues that 6~8min of reaction is mixed, reaction solution is obtained, by matter
Amount is than being 8：10~12min of reaction is mixed in the concentrated sulfuric acid solution that reaction solution and mass fraction are 98% by 1, and dry discharging obtains
To desiccant gel；Desiccant gel is placed under the protection of argon gas, 1000~1150 are heated to the rate of 2~4 DEG C/min
DEG C, constant temperature handles 2~4h, and cooled to room temperature is placed in high-temperature roasting furnace, under conditions of temperature is 650~700 DEG C
Roast 1~3h, obtain calcining matter, the hydrofluoric acid dips calcining matter 1~2 day for being 32% with mass fraction, grinding discharging to get from
Preparing silicon carbide powder；It weighs the mixing of 11~13g lotus leaves to be placed in the beaker with 50~65mL deionized waters, and beaker is placed in
It is ultrasonic under conditions of temperature is 60~65 DEG C, power is 160~180W and frequency is 24~32kHz in supersonic oscillations instrument
35~45min is extracted, filtering removal filter residue collects filtrate, filtrate carried out 6~8min of vacuum distillation, cooling discharging obtains certainly
Self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid are 2 in mass ratio by plant extraction liquid processed：1：5 is mixed
It closes after impregnating 35~45min, is separated by filtration to obtain filter residue, filter residue is placed in and is dried 3~5 days at room temperature, grinding discharging is changed
Property self-control silicon carbide powder；It counts in parts by weight, weighs 32~40 parts of phenol-formaldehyde resin modifieds, 12~16 parts of modified self-control carbon respectively
SiClx powder and 4~6 parts of molybdenum disulfide mixing are placed in blender, and 10 are stirred under conditions of rotating speed is 120~160r/min
~12min, then 2~4 parts of cumyl hydroperoxides, 1~3 part of stearic acid and 1~3 part of absolute ethyl alcohol are added, continue to keep rotating speed
24~32min is stirred, mixture is obtained, mixture is placed in brake block die, be placed in press, is 160 in temperature
~180 DEG C, be press-formed under conditions of 32~40MPa of pressure, after taking out molded product, cooled to room temperature is finally placed in heat
In treatment box, 2~4h is heat-treated at 175~185 DEG C of temperature, cooling discharging is to get modified silicon carbide group automobile brake block.
It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 16min, obtains mixed-powder,
It is 5 in mass ratio again：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 10min under conditions of 160r/min, obtains phenol-formaldehyde resin modified；It is 1 in mass ratio：6：3 by sucrose, deionized water
It is placed in beaker with sodium metasilicate mixing and 12min is mixed, obtain stirring liquid, then stirring liquid quality 0.5% is added into stirring liquid
Mass fraction be 20% hydrochloric acid, continue be mixed reaction 6min, obtain reaction solution, be in mass ratio 8：1 by reaction solution and
Reaction 10min is mixed in the concentrated sulfuric acid solution that mass fraction is 98%, and dry discharging obtains desiccant gel；Desiccant gel is set
Under the protection of argon gas, 1000 DEG C are heated to the rate of 2 DEG C/min, constant temperature handles 2h, cooled to room temperature, juxtaposition
In high-temperature roasting furnace, 1h is roasted under conditions of temperature is 650 DEG C, obtains calcining matter, the hydrofluoric acid for being 32% with mass fraction
Impregnate calcining matter 1 day, grinding discharging is to get self-control silicon carbide powder；The mixing of 11g lotus leaves is weighed to be placed in 50mL deionized waters
Beaker in, and beaker is placed in supersonic oscillations instrument, temperature be 60 DEG C, the item that power is 160W and frequency is 24kHz
Ultrasonic extraction 35min under part, filtering removal filter residue, collects filtrate, filtrate is carried out vacuum distillation 6min, cooling discharging obtains
It makes plant extraction liquid by oneself, is 2 in mass ratio by self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid：1：5
It after mixing immersion 35min, is separated by filtration to obtain filter residue, filter residue is placed in and is dried 3 days at room temperature, grinding discharging obtains being modified certainly
Preparing silicon carbide powder；It counts in parts by weight, weighs 32 parts of phenol-formaldehyde resin modifieds, 12 parts of modified self-control silicon carbide powders and 4 respectively
Part molybdenum disulfide mixing is placed in blender, stirs 10min under conditions of rotating speed is 120r/min, then add 2 parts of peroxidating
Hydrogen isopropylbenzene, 1 part of stearic acid and 1 part of absolute ethyl alcohol continue to keep rotating speed stirring 24min, obtain mixture, mixture is placed in
In brake block die, be placed in press, temperature be 160 DEG C, pressure 32MPa under conditions of be press-formed, take out molding
After product, cooled to room temperature is finally placed in heat treatment box, is heat-treated 2h at 175 DEG C of temperature, and cooling discharging is to get changing
The silicon carbide-based automotive brake pads of property.
It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 18min, obtains mixed-powder,
It is 5 in mass ratio again：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 11min under conditions of 180r/min, obtains phenol-formaldehyde resin modified；It is 1 in mass ratio：6：3 by sucrose, deionized water
It is placed in beaker with sodium metasilicate mixing and 14min is mixed, obtain stirring liquid, then stirring liquid quality 0.5% is added into stirring liquid
Mass fraction be 20% hydrochloric acid, continue be mixed reaction 7min, obtain reaction solution, be in mass ratio 8：1 by reaction solution and
Reaction 11min is mixed in the concentrated sulfuric acid solution that mass fraction is 98%, and dry discharging obtains desiccant gel；Desiccant gel is set
Under the protection of argon gas, the rate of 3 DEG C/min is heated to 1075 DEG C, and constant temperature handles 3h, and cooled to room temperature is placed in
In high-temperature roasting furnace, 12h is roasted under conditions of temperature is 675 DEG C, obtains calcining matter, the hydrofluoric acid for being 32% with mass fraction
Impregnate calcining matter 1.5 days, grinding discharging is to get self-control silicon carbide powder；The mixing of 12g lotus leaves is weighed to be placed in 57mL deionizations
In the beaker of water, and beaker is placed in supersonic oscillations instrument, temperature is 63 DEG C, power is 170W and frequency is 28kHz's
Under the conditions of ultrasonic extraction 40min, filtering removal filter residue, collect filtrate, filtrate is subjected to vacuum distillation 7min, cooling discharging obtains
It is 2 in mass ratio by self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid to self-control plant extraction liquid：
1：It after 40min is impregnated in 5 mixing, is separated by filtration to obtain filter residue, filter residue is placed in and is dried 4 days at room temperature, grinding discharging is modified
Make silicon carbide powder by oneself；Count in parts by weight, weigh respectively 36 parts of phenol-formaldehyde resin modifieds, 14 parts of modified self-control silicon carbide powders and
5 parts of molybdenum disulfide mixing are placed in blender, stir 11min under conditions of rotating speed is 140r/min, then add 3 parts of peroxidating
Hydrogen isopropylbenzene, 2 parts of stearic acid and 2 parts of absolute ethyl alcohols continue to keep rotating speed stirring 28min, obtain mixture, mixture is placed in
In brake block die, be placed in press, temperature be 170 DEG C, pressure 37MPa under conditions of be press-formed, take out molding
After product, cooled to room temperature is finally placed in heat treatment box, is heat-treated 3h at 180 DEG C of temperature, and cooling discharging is to get changing
The silicon carbide-based automotive brake pads of property.
It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 20min, obtains mixed-powder,
It is 5 in mass ratio again：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 12min under conditions of 200r/min, obtains phenol-formaldehyde resin modified；It is 1 in mass ratio：6：3 by sucrose, deionized water
It is placed in beaker with sodium metasilicate mixing and 16min is mixed, obtain stirring liquid, then stirring liquid quality 0.5% is added into stirring liquid
Mass fraction be 20% hydrochloric acid, continue be mixed reaction 8min, obtain reaction solution, be in mass ratio 8：1 by reaction solution and
Reaction 12min is mixed in the concentrated sulfuric acid solution that mass fraction is 98%, and dry discharging obtains desiccant gel；Desiccant gel is set
Under the protection of argon gas, 1150 DEG C are heated to the rate of 4 DEG C/min, constant temperature handles 4h, cooled to room temperature, juxtaposition
In high-temperature roasting furnace, 3h is roasted under conditions of temperature is 700 DEG C, obtains calcining matter, the hydrofluoric acid for being 32% with mass fraction
Impregnate calcining matter 2 days, grinding discharging is to get self-control silicon carbide powder；The mixing of 13g lotus leaves is weighed to be placed in 65mL deionized waters
Beaker in, and beaker is placed in supersonic oscillations instrument, temperature be 65 DEG C, the item that power is 180W and frequency is 32kHz
Ultrasonic extraction 45min under part, filtering removal filter residue, collects filtrate, filtrate is carried out vacuum distillation 8min, cooling discharging obtains
It makes plant extraction liquid by oneself, is 2 in mass ratio by self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid：1：5
It after mixing immersion 45min, is separated by filtration to obtain filter residue, filter residue is placed in and is dried 5 days at room temperature, grinding discharging obtains being modified certainly
Preparing silicon carbide powder；It counts in parts by weight, weighs 40 parts of phenol-formaldehyde resin modifieds, 16 parts of modified self-control silicon carbide powders and 6 respectively
Part molybdenum disulfide mixing is placed in blender, stirs 12min under conditions of rotating speed is 160r/min, then add 4 parts of peroxidating
Hydrogen isopropylbenzene, 3 parts of stearic acid and 3 parts of absolute ethyl alcohols continue to keep rotating speed stirring 32min, obtain mixture, mixture is placed in
In brake block die, be placed in press, temperature be 180 DEG C, pressure 40MPa under conditions of be press-formed, take out molding
After product, cooled to room temperature is finally placed in heat treatment box, is heat-treated 4h at 185 DEG C of temperature, and cooling discharging is to get changing
The silicon carbide-based automotive brake pads of property.
With the automotive brake pads of company of Foshan City production as a comparison case to the silicon carbide-based vapour of modification produced by the present invention
Automotive brake pads in vehicle brake block and comparative example is detected, and testing result is as shown in table 1：
1, attriting performance is tested
The test block that size is 25mm × 25mm × 10mm is made in example 1~3 and comparative example prepared by the present invention.Using
Speed-adjustable voltage-adjustable dry wear test machine, temperature is 150~550 DEG C, brake pressure 1.5MPa, sliding speed are 20m/s's
Under the conditions of tested.
Crack resistance is tested
It is tested by national standard GB5763-2008 standards.
Shearing test
It is tested according to standard ISO6312.
Hardness test
It is tested according to standard GB5766.
1 performance measurement result of table
According to data in table 1 it is found that modified silicon carbide group automobile brake block produced by the present invention is light, hardness is high, impact strength
Greatly, friction coefficient is moderate, shear strength is high, thermal expansion effects are small, brake noise is low, thermal stability is good, low wear rate, and brakes
Steadily, safe and reliable, hence it is evident that be better than comparative example.Therefore, there is wide prospect of the application.
Claims (6)
1. a kind of preparation method of modified silicon carbide group automobile brake block, it is characterised in that specifically preparation process is：
（1）It is 3 in mass ratio by phenolic resin and hexamethylenetetramine：1 mixed grinding crushes 16~20min, obtains mixed powder
End, then be 5 in mass ratio：1：2 are placed in the mixing of mixed-powder, acrylonitrile-butadiene rubber powder and cashew nut shell oil in blender, are in rotating speed
It is stirred to react 10~12min under conditions of 160~200r/min, obtains phenol-formaldehyde resin modified；
（2）Sucrose, deionized water and sodium metasilicate are mixed to be placed in beaker and are mixed, obtains stirring liquid, then into stirring liquid
The hydrochloric acid of stirring liquid quality 0.5% is added, continues that reaction is mixed, obtains reaction solution, reaction solution and concentrated sulfuric acid solution are mixed
It is stirred to react, dry discharging obtains desiccant gel；
（3）Desiccant gel is placed under the protection of argon gas, with the rate heat temperature raising of 2~4 DEG C/min, constant temperature processing is naturally cold
But to room temperature, it is placed in high-temperature roasting kiln roasting, obtains calcining matter, with hydrofluoric acid dips calcining matter, grinding discharging is to get certainly
Preparing silicon carbide powder；
（4）It weighs the mixing of 11~13g lotus leaves to be placed in the beaker with 50~65mL deionized waters, and beaker is placed in ultrasonic wave
Ultrasonic extraction in shaker, filtering removal filter residue, collects filtrate, filtrate is evaporated under reduced pressure, cooling discharging, obtains self-control and plants
Self-control silicon carbide powder, lauryl sodium sulfate and self-control plant extraction liquid are mixed after impregnating, are separated by filtration by object extracting solution
To filter residue, filter residue is placed in and is dried at room temperature, grinding discharging obtains modified self-control silicon carbide powder；
（5）It counts in parts by weight, weighs 32~40 parts of phenol-formaldehyde resin modifieds, 12~16 parts of modified self-control silicon carbide powders respectively
It is placed in blender and stirs with 4~6 parts of molybdenum disulfide mixing, then add 2~4 parts of cumyl hydroperoxides, 1~3 part of stearic acid
With 1~3 part of absolute ethyl alcohol, continues to keep rotating speed stirring, obtain mixture, mixture is placed in brake block die, be placed in
It is press-formed in press, after taking out molded product, cooled to room temperature is finally placed in heat treatment box and is heat-treated, and cooling goes out
Material is to get modified silicon carbide group automobile brake block.
2. a kind of preparation method of modified silicon carbide group automobile brake block according to claim 1, it is characterised in that：Step
（1）The mass ratio of the phenolic resin and hexamethylenetetramine is 3：1, it is 16~20min, mixed powder to grind the time
The mass ratio at end, acrylonitrile-butadiene rubber powder and cashew nut shell oil is 5：1：2, it is 160~200r/min to be stirred to react rotating speed, when being stirred to react
Between be 10~12min.
3. a kind of preparation method of modified silicon carbide group automobile brake block according to claim 1, it is characterised in that：Step
（2）The mass ratio of the sucrose, deionized water and sodium metasilicate is 1：6：3, mixing time is 12~16min, the quality of hydrochloric acid
Score is 20%, and it is 6~8min, the mass ratio for the concentrated sulfuric acid solution that reaction solution and mass fraction are 98% to continue to be stirred to react the time
It is 8：1, it is 10~12min to be stirred to react the time.
4. a kind of preparation method of modified silicon carbide group automobile brake block according to claim 1, it is characterised in that：Step
（3）The heat temperature raising temperature is 1000~1150 DEG C, and constant temperature processing time is 2~4h, and calcination temperature is 650~700 DEG C,
Roasting time is 1~3h, and the mass fraction of hydrofluoric acid is 32%, and soaking time is 1~2 day.
5. a kind of preparation method of modified silicon carbide group automobile brake block according to claim 1, it is characterised in that：Step
（4）The ultrasonic extraction temperature be 60~65 DEG C, ultrasonic extraction power be 160~180W, ultrasonic extraction frequency be 24~
32kHz, ultrasonic extraction time are 35~45min, and the vacuum distillation time is 6~8min, self-control silicon carbide powder, dodecyl sulphur
The mass ratio of sour sodium and self-control plant extraction liquid is 2：1：5, soaking time is 35~45min, and drying time is 3~5 days.
6. a kind of preparation method of modified silicon carbide group automobile brake block according to claim 1, it is characterised in that：Step
（5）The speed of agitator is 120~160r/min, and mixing time is 10~12min, and continuation mixing time is 24~32min,
It is 160~180 DEG C to be press-formed temperature, and extrusion forming pressure is 32~40MPa, and heat treatment temperature is 175~185 DEG C, at heat
The reason time is 2~4h.
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Application publication date: 20180911 |