A kind of assorted fibre enhancing ceramic-based friction material and its preparation method and application
Technical field
The present invention relates to friction materials technology fields, and more particularly to a kind of assorted fibre enhancing ceramic-based friction material and
Preparation method and application.
Background technology
Friction material has many advantages, such as that mechanical performance is high, friction stability is good and wear resistance is high, is to be widely used in vapour
A kind of key function material in vehicle brake, can provide important safety assurance for automobile brake.Therefore, high-performance is developed
Brake friction material meets the design requirement of braking, and the technical merit to improving brake apparatus plays an important roll and actually answers
With value.Currently, having carried out extensive research for the friction material of the types such as semimetal, and more achievement is obtained, but it is deposited
Easy-to-rust, brake noise is big, easily hinder antithesis disk the problems such as, it is also necessary to further improve.
Invention content
The purpose of the present invention is to provide a kind of assorted fibres to enhance ceramic-based friction material, the lower cost for material, tool
There are preferable stability, high temperature resistance, wearability and acidproof corrosion resistance.
Another object of the present invention is to provide the preparation method that above-mentioned assorted fibre enhances ceramic-based friction material, the party
Method is easy to operate, and controllability is strong, is suitable for industrialized production.
Another object of the present invention is to provide above-mentioned assorted fibre to enhance ceramic-based friction material in terms of automobile making
Application.
The present invention solves its technical problem using following technical scheme to realize.
The present invention proposes that a kind of assorted fibre enhancing ceramic-based friction material prepares assorted fibre by weight percentage
Enhancing ceramic-based friction material raw material include:Assorted fibre 10~30%, flyash 30~55%, binder 8~23% are resistance to
Grinding agent 13~32% and lubricant 6~17%, assorted fibre include alumina fibre and Zirconium oxide fibre.
The present invention proposes the preparation method of above-mentioned assorted fibre enhancing ceramic-based friction material, including:By the batch mixing of raw material
Cold pressing solidification and hot-press solidifying are carried out, then will be heat-treated by cured material.
Application of the above-mentioned assorted fibre enhancing ceramic-based friction material in terms of automobile making.
The beneficial effects of the invention are as follows:
The present invention using assorted fibre, flyash, binder, anti-wear agent and lubricant as raw material, using flyash as
Ceramic matrix, it includes alumina fibre and Zirconium oxide fibre to have preferable high temperature resistance, assorted fibre, have high intensity,
High tenacity, high-temperature oxidation resistance, high temperature stability performance, acid-alkali-corrosive-resisting performance, three are used in combination with synergy
Effect forms high temperature resistant, the Co-crosslinked System of high tenacity under the action of binder, anti-wear agent and lubricant, adjusts each component
Proportioning so that assorted fibre obtained enhancing ceramic-based friction material has preferably high temperature resistance, wear-resisting property, acidproof
Corrosion resistance, mechanical property and mechanical strength in terms of can be applied to automobile making, can be used for preparing the frictions such as automotive brake pads
Material so that the automotive brake pads heat-resisting quantity of preparation is good, abrasion is small, brake noise is small.Flyash is industrial residue, by waste
It recycles, reduces influence of the industrial residue to environment, while reducing production cost.Assorted fibre enhances ceramic-based friction material
Preparation method simple possible, controllability is strong, is suitable for industrialized production.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Ceramic-based friction material and its preparation method and application is enhanced to a kind of assorted fibre of the embodiment of the present invention below
It is specifically described.
A kind of assorted fibre provided in an embodiment of the present invention enhances ceramic-based friction material, by weight percentage, prepares
Assorted fibre enhancing ceramic-based friction material primary raw material include:Assorted fibre 10~30%, flyash 30~55% bond
Agent 8~23%, anti-wear agent 13~32% and lubricant 6~17%, assorted fibre include alumina fibre and Zirconium oxide fibre.
Preferably, assorted fibre is 15~25%, and flyash is 35~50%, and binder is 10~20%, and anti-wear agent is 15~30%
And lubricant is 10~15%.
Assorted fibre includes alumina fibre and Zirconium oxide fibre, alumina fibre have temperature in use it is high, it is corrosion-resistant and
The advantages that matrix compatibility is good, intensity is higher, brake noise is low, braking effort is good, Zirconium oxide fibre have intensity height, toughness
It is good, temperature in use is high, high-temperature oxidation resistance is fabulous, have stable high-temperature performance, is non-volatile, is pollution-free, durable and green ring
The features such as guarantor, meanwhile, the ability of the acid-alkali-corrosive-resisting of Zirconium oxide fibre is also much stronger than alumina fibre and glass fibre etc..It is multiple
It closes and uses alumina fibre and Zirconium oxide fibre, can significantly enhance the mechanical property of friction material, wearability, hardness and resistance to
High-temperature behavior.Preferably, when the mass ratio of alumina fibre and Zirconium oxide fibre is 1~5:When 1, the physical property of friction material
Preferable with chemical property, especially high temperature resistance is promoted larger.
With the development of industry, industrial residue flyash discharge capacity increases year by year, becomes the larger work of the current discharge capacity in China
One of industry waste residue.A large amount of flyash is untreated, will produce airborne dust, pollutes air;River can be caused to silt up if being discharged into water system,
And toxic chemical substance therein can also cause damages to human body and biology.The present invention is carried using flyash as ceramic matrix
The ceramic content of high material, and then high temperature resistance, friction and wear behavior, the chemical stability of material are improved, noise is reduced, and
And refuse reclamation, influence of the industrial residue to environment is reduced, production cost is reduced.The flyash that the present invention uses is mainly work
Industry waste residue and pulverized fuel ash, industrial residue flyash mainly include silica, zirconium oxide, ferrous oxide, iron oxide, calcium oxide and
The substances such as titanium dioxide.Flyash can also enhance the metal species of the assorted fibre enhancing ceramic-based friction material of preparation and contain
Amount, with alumina fibre and Zirconium oxide fibre collective effect, has the function of synergy, improves mechanical strength, the power of material
Learn performance and friction and wear behavior.
Binder is the guarantee of adhesion strength between abrasive material and matrix, and binder includes phenolic resin, nitrile rubber, benzo
At least one of oxazine resin, epoxy resin.When binder includes two kinds or more of chemical agent, fully comprehensively utilize not
With the performance of binder, high temperature resistant, the Co-crosslinked System of high tenacity are formed with assorted fibre and flyash, further increases friction
Mechanical strength, mechanical property, resistance to acid and alkali and the friction and wear behavior of material.Preferably, phenolic resin includes cashew nut shell oil
Phenol-formaldehyde resin modified.
Friction material needs have higher wear-resisting property, ensures its service life.The anti-wear agent packet of the embodiment of the present invention
Include at least one of ice crystal, ferroso-ferric oxide and copper powder.When compound use ice crystal, ferroso-ferric oxide and copper powder
When, transfer membrane is formed between friction material and antithesis, is improved moment of friction and is stablized friction coefficient, reduces the damage to mating plate
Wound, wear-resisting property is highly improved, while also improving the thermal stability of friction material.
Lubricant assists anti-wear agent to improve the wearability of friction material, reduces noise and reduces friction coefficient.In the present invention
Lubricant includes at least one of molybdenum disulfide and graphite.
Further, in the present invention preferably embodiment, when raw material includes:Assorted fibre 10~30%, flyash 30
~55%, phenolic resin 5~15%, nitrile rubber 3~8%, ice crystal 5~10%, molybdenum disulfide 1~5%, graphite 5~
12%, when ferroso-ferric oxide 5~12% and copper powder 3~10%, assorted fibre enhancing ceramic-based friction material obtained has
Preferable high temperature resistance, mechanical property, wearability, resistance to acid and alkali and mechanical strength.Preferably, the content of assorted fibre can be with
Be 16%, 19%, 21%, 22%, 26%, 28%, 30%, the content of flyash can be 31%, 33%, 36%, 37%,
39%, 42%, 46%, 48%, 51%, 55%, the content of phenolic resin can be 6%, 7%, 9%, 12%, 15%, Ding Qing
The content of rubber can be 4%, 5%, 7%, 6%, and the content of ice crystal can be 6%, 7%, 8%, 9%, molybdenum disulfide
Content can be 2%, 4%, and the content of graphite can be 7%, 8%, 9%, 11%, the content of ferroso-ferric oxide can be 6%,
9%, 10% and copper powder content can be 6%, 8%, 9%.
The present invention also provides the preparation methods that above-mentioned assorted fibre enhances ceramic-based friction material, including:
Dispensing:Raw material is weighed according to the ratio;
Batch mixing:The present invention uses batch mixer batch mixing, the raw material weighed up is put into high speed mixer, 4~6min of batch mixing.
Compression moulding:The present invention uses cold moudling-hot-press solidifying two-step method, and batch mixing is poured into cold stamping die, 140~
10~15s of pressurize under the pressure of 160MPa.To through and cold pressing cured batch mixing and be placed in hot-die, 155~165 DEG C, 30~
Pressurize is carried out under conditions of 50MPa, the thickness for enhancing ceramic-based friction material during pressurize according to assorted fibre is put
Gas.Preferably, each deflation time is 60s/mm, and deflation number is 8~12 times.The step makes each raw material combines more to step up
It is close, enhance the density and mechanical strength of friction material.
Heat treatment:Batch mixing after solidification is kept the temperature into 3~5h under conditions of 150~170 DEG C, with 3~5 DEG C/min's
After heating rate rises to 200~220 DEG C, 3~5h is kept the temperature.Material its stability after heat treatment is more preferable, and high temperature resistance is more preferably.
Assorted fibre provided by the invention enhancing ceramic-based friction material have preferable high temperature resistance, mechanical property,
Wearability, resistance to acid and alkali and mechanical strength in terms of can be applied to automobile making, can be used for preparing the friction materials such as automotive brake pads
Material so that the automotive brake pads heat-resisting quantity of preparation is good, abrasion is small, brake noise is small.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof is present embodiments provided, including:
By weight percentage, assorted fibre 10% is weighed, flyash 48%, cashew nut oil modified alkyd resin 12%,
Nitrile rubber 3%, ice crystal 6%, molybdenum disulfide 2%, graphite 7%, ferroso-ferric oxide 7%, copper powder 5%.Assorted fibre includes
Mass ratio is 1:1 alumina fibre and Zirconium oxide fibre.
Each component materials are weighed by above-mentioned weight ratio, using cold moudling-hot-press solidifying two-step method, including:
Load weighted each material is put into cone tank batch mixer, batch mixing 4min;The mixture weighed is poured into cold stamping die
In, pressure 142MPa, dwell time 11s;Sample after cold pressing is put into hot-die, temperature is 155 DEG C, pressure is
Under conditions of 30MPa, pressurize 12min deflates 11 times;Ceramic-based friction material sample after solidification is put into heat-treatment furnace,
3h is kept the temperature under conditions of 150 DEG C, 200 DEG C is warming up to the heating rate of 3 DEG C/min, keeps the temperature 3h.
Embodiment 2
A kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof is present embodiments provided, including:
By weight percentage, assorted fibre 20%, flyash 42%, cashew nut oil modified alkyd resin 8%, fourth are weighed
Nitrile rubber 4%, ice crystal 6%, molybdenum disulfide 3%, graphite 7%, ferroso-ferric oxide 5%, copper powder 5%.Assorted fibre includes matter
Amount is than being 5:1 alumina fibre and Zirconium oxide fibre.
Each component materials are weighed by above-mentioned weight ratio, using cold moudling-hot-press solidifying two-step method, including:
Load weighted each material is put into cone tank batch mixer, batch mixing 5min;The mixture weighed is poured into cold stamping die
In, pressure 150MPa, dwell time 12s;Sample after cold pressing is put into hot-die, temperature is 160 DEG C, pressure is
Under conditions of 40MPa, pressurize 12min deflates 10 times;Ceramic-based friction material sample after solidification is put into heat-treatment furnace,
4h is kept the temperature under conditions of 160 DEG C, 210 DEG C is warming up to the heating rate of 5 DEG C/min, keeps the temperature 4h.
Embodiment 3
A kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof is present embodiments provided, including:
By weight percentage, assorted fibre 30%, flyash 40%, cashew nut oil modified alkyd resin 8%, fourth are weighed
Nitrile rubber 2%, ice crystal 4%, molybdenum disulfide 2%, graphite 6%, ferroso-ferric oxide 4%, copper powder 4%.Assorted fibre includes matter
Amount is than being 2:1 alumina fibre and Zirconium oxide fibre.
Each component materials are weighed by above-mentioned weight ratio, using cold moudling-hot-press solidifying two-step method, including:
Load weighted each material is put into cone tank batch mixer, batch mixing 5min;The mixture weighed is poured into cold stamping die
In, pressure 150MPa, dwell time 12s;Sample after cold pressing is put into hot-die, temperature is 160 DEG C, pressure is
Under conditions of 40MPa, pressurize 12min deflates 10 times;Ceramic-based friction material sample after solidification is put into heat-treatment furnace,
4h is kept the temperature under conditions of 160 DEG C, 210 DEG C is warming up to the heating rate of 5 DEG C/min, keeps the temperature 4h.
Embodiment 4
A kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof is present embodiments provided, including:
By weight percentage, assorted fibre 30%, flyash 35%, cashew nut oil modified alkyd resin 8%, fourth are weighed
Nitrile rubber 6%, ice crystal 5%, molybdenum disulfide 2%, graphite 6%, ferroso-ferric oxide 5%, copper powder 3%.Assorted fibre includes matter
Amount is than being 3:1 alumina fibre and Zirconium oxide fibre.
Each component materials are weighed by above-mentioned weight ratio, using cold moudling-hot-press solidifying two-step method, including:
Load weighted each material is put into cone tank batch mixer, batch mixing 6min;The mixture weighed is poured into cold stamping die
In, pressure 150MPa, dwell time 15s;Sample after cold pressing is put into hot-die, temperature is 165 DEG C, pressure is
Under conditions of 50MPa, pressurize 13min deflates 9 times;Ceramic-based friction material sample after solidification is put into heat-treatment furnace,
5h is kept the temperature under conditions of 160 DEG C, 220 DEG C is warming up to the heating rate of 4 DEG C/min, keeps the temperature 5h.
Embodiment 5
A kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof is present embodiments provided, including:
By weight percentage, assorted fibre 30% is weighed, flyash 30%, cashew nut oil modified alkyd resin 13%,
Nitrile rubber 4%, ice crystal 5%, molybdenum disulfide 3%, graphite 6%, ferroso-ferric oxide 4%, copper powder 5%.Assorted fibre includes
Mass ratio is 4:1 alumina fibre and Zirconium oxide fibre.
Each component materials are weighed by above-mentioned weight ratio, using cold moudling-hot-press solidifying two-step method, including:
Load weighted each material is put into cone tank batch mixer, batch mixing 4min;The mixture weighed is poured into cold stamping die
In, pressure 145MPa, dwell time 14s;Sample after cold pressing is put into hot-die, temperature is 160 DEG C, pressure is
Under conditions of 50MPa, pressurize 12min deflates 11 times;Ceramic-based friction material sample after solidification is put into heat-treatment furnace,
3h is kept the temperature under conditions of 170 DEG C, 210 DEG C is warming up to the heating rate of 5 DEG C/min, keeps the temperature 4h.
Comparative example 1
This comparative example provides a kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof, including:
By weight percentage, glass fibre 45%, assorted fibre 10%, cashew nut oil modified alkyd resin are weighed
20%, ice crystal 8%, graphite 10%, copper powder 7%.Assorted fibre includes that mass ratio is 2:1 alumina fibre and zirconium oxide is fine
Dimension.
Each component materials are weighed by above-mentioned weight ratio, prepared by the preparation method provided using embodiment 1.
Comparative example 2
This comparative example provides a kind of assorted fibre enhancing ceramic-based friction material and preparation method thereof, including:
By weight percentage, it weighs by weight percentage, weighs alumina fibre 15%, glass fibre 45%, powder
Coal ash 10%, nitrile rubber 7%, ice crystal 1%, molybdenum disulfide 2%, graphite 12%, copper powder 8%.
Each component materials are weighed by above-mentioned weight ratio, prepared by the preparation method provided using embodiment 2.
According to national standard GB5763-2008, the assorted fibre enhancing ceramic-based friction material that provide Examples 1 to 5 and right
The friction material that ratio 1~2 provides carries out fixed speed fricting test, and the results are shown in Table 1 for acquisition.
1 assorted fibre of table enhances ceramic-based friction material fixed speed fricting test result
As it can be seen from table 1 compared to comparative example 1~2, assorted fibre prepared by Examples 1 to 5 enhances ceramic base friction
Material uses assorted fibre and flyash as raw material, under the action of binder, anti-wear agent and lubricant, formation high temperature resistant,
The Co-crosslinked System of high tenacity so that assorted fibre obtained enhancing ceramic-based friction material friction coefficient at high temperature, mill
Loss rate stability is preferable, without apparent heat fading phenomenon, complies with the national standard requirements.The brake pad surface obtained after experiment is complete
Whole, flawless has the characteristics that abrasion is small, noiseless.Illustrate assorted fibre enhancing ceramic-based friction material provided by the invention
Preparation method it is more scientific and reasonable, the component and dosage of raw material are more scientific and reasonable.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.