CN105567159A - Ceramic fiber friction material and preparation method thereof - Google Patents
Ceramic fiber friction material and preparation method thereof Download PDFInfo
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- CN105567159A CN105567159A CN201410546919.0A CN201410546919A CN105567159A CN 105567159 A CN105567159 A CN 105567159A CN 201410546919 A CN201410546919 A CN 201410546919A CN 105567159 A CN105567159 A CN 105567159A
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Abstract
The invention discloses a ceramic fiber friction material. The ceramic fiber friction material is prepared from aluminum-silicon ceramic fiber, carbon fiber, potassium titanate whiskers, copper powder, vermiculite, magnesium oxide, coal ash, modified phenolic resin and nitrile rubber according to certain weight percentages. The invention further discloses a preparation method of the ceramic fiber friction material. The method comprises the specific steps that solid materials are placed into a grinder to be ground; the needed raw materials are weighed and mixed, then molding capacity treatment is performed, cold pressing blanks are manufactured and stuck to a steel fiber layer, and heat treatment is performed to obtain the ceramic fiber friction material. The ceramic fiber friction material is resistant to high temperature and has the good friction resistance, and the preparation method is simple in steps and easy to implement.
Description
Technical field
The invention belongs to friction materials technology field, be specifically related to a kind of ceramic fiber friction materials, the invention still further relates to the preparation method of this ceramic fiber friction materials.
Background technology
Friction materials is widely used in braking, the transmission system of the transport facilitys such as automobile, train, aircraft, steamer and power machine.Automotive Friction Material is the critical material in automotive brake, clutch coupling and friction gear, it is heat energy and other forms of energy by the kinetic transformation of automobile, thus make the one of car deceleration or stop motion be major function with friction, have the multicomponent composite materials of structural performance requirements concurrently.
In recent years, highway, the railway traffic development of China are rapid, greatly facilitate China's automobile, train industrial expansion, thus also increase very fast for the performance requriements of friction materials, demand, expect 2010, China's automobile pollution will reach 4,500 ten thousand, and the friction materials that only automobile needs for a year just reaches 450,000 tons, and consumption is very huge.Because fibrous magnesium silicate affects the health of human body, various countries have carried out the development of asbestos-free brake facing in succession.Semimetal friction material is the current widely used friction materials of China.Semimetal friction material adopts steel fiber as strongthener, and the expensive metal-powder such as copper is as frictional property regulator.Metallic substance gets rusty easily, and easily adhere after corrosion or damage antithesis, after friction materials corrosion, intensity reduces simultaneously, and wearing and tearing aggravate.Metallic substance density is high, increases the weight of breaking system.And, when content of steel fiber is more than 10wt.%, easily causes during braking and scream, produce the problems such as chatter.
Along with high speed and the heavy loading of development of automobile, more and more harsher to the requirement of brake friction material accordingly.The absorption of friction materials can be directly proportional to the speed of a motor vehicle square substantially, after brake structural changes disc type into by drum-type, decrease weight, but the surface-area of disk-type braking gland only has 1/4 ~ 1/6 of drum-type, absorption per unit area energy then increases by 4 ~ 6 times, and surface of friction pair transient temperature can up to 1000 DEG C, and metallic substance at such high temperatures, the even melting of meeting rapid oxidation, thus affect the stable of Properties of Friction Materials.Visible, the development of novel fire resistant friction materials is very urgent.
Summary of the invention
The object of this invention is to provide a kind of ceramic fiber friction materials, solve that metal brake system weight is large, non-refractory and the problem such as semimetal friction material preparation cost is high.
Another object of the present invention is to provide the preparation method of this ceramic fiber friction materials.
The technical solution adopted in the present invention is, a kind of ceramic fiber friction materials, is characterized in that, according to weight percent, be made up of following feed composition: aluminum-silicon ceramic fiber 5.5% ~ 16.5%, carbon fiber 9.5% ~ 18.5%, potassium titanate crystal whisker 6% ~ 11%, copper powder 3% ~ 5%, vermiculite 12 ~ 17%, magnesium oxide 8% ~ 15%, modified phenolic resins and paracril 15% ~ 25%, flyash 15% ~ 30%, above each weight percentages of components sum is 100%.
Another technical scheme of the present invention is, a kind of preparation method of ceramic fiber friction materials, and it is characterized in that, concrete steps are as follows:
Step 1, potassium titanate crystal whisker, copper powder, vermiculite, magnesium oxide, modified phenolic resins and paracril, flyash solid material are put into shredder and carried out milled processed;
In step 2, the raw material that obtains in step 1, take respectively according to weight percent: aluminum-silicon ceramic fiber 5.5% ~ 16.5%, carbon fiber 9.5% ~ 18.5%, potassium titanate crystal whisker 6% ~ 11%, copper powder 3% ~ 5%, vermiculite 12 ~ 17%, magnesium oxide 8% ~ 15%, modified phenolic resins and paracril 15% ~ 25%, flyash 15% ~ 30%, above each weight percentages of components sum is 100%;
High speed mixer mixing 2min ~ 5min put into by step 3, raw material step 2 taken, after mixing, and at room temperature coldmoulding;
Step 4: blank step 3 obtained is hot-pressed onto on the steel fiber layer of backsizing, hot pressing pressure is 10MPa, and temperature is 140 DEG C ~ 180 DEG C, dwell time 1 ~ 3min;
Step 6: the material obtained in step 5 is put into equipment for Heating Processing, thermal treatment 3.5h ~ 4.5h at 170 DEG C ~ 200 DEG C temperature, namely obtains.
The instrument used in step 3 is chilling press, and pressure is 10MPa.
In step 4, pressure maintaining period should discharge pressure and low molecular weight gas several times, and the timed interval is 20s, 50s and 80s.
Ceramic fiber friction materials of the present invention has the following advantages:
1, be widely used, can be used for the transmission of the transport facilitys such as automobile, train, aircraft, steamer and power machine, breaking system.
2, select aluminum-silicon ceramic fiber, carbon fiber and potassium titanate crystal whisker as the strongthener of ceramic type friction material, breaking system weight is little, and can significantly improve the stable friction factor of friction materials.
Preparation method of the present invention is simple, easily realizes.
Accompanying drawing explanation
Fig. 1 is preparation technology's schema of ceramic fiber friction materials of the present invention;
Fig. 2 is the morphology figure of the ceramic fiber friction materials sample friction surface fiber exposure position that the embodiment of the present invention 1 obtains;
Fig. 3 is the morphology figure of the ceramic fiber friction materials sample friction surface fiber exposure position that the embodiment of the present invention 2 obtains;
Fig. 4 is the morphology figure of the ceramic fiber friction materials sample friction surface fiber exposure position that the embodiment of the present invention 3 obtains;
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
A kind of ceramic fiber friction materials of the present invention and preparation method thereof, according to weight percent, be made up of following feed composition: aluminum-silicon ceramic fiber 5.5% ~ 16.5%, carbon fiber 9.5% ~ 18.5%, potassium titanate crystal whisker 6% ~ 11%, copper powder 3% ~ 5%, vermiculite 12 ~ 17%, magnesium oxide 8% ~ 15%, modified phenolic resins and paracril 15% ~ 25%, flyash 15% ~ 30%, above each weight percentages of components sum is 100%.
Due to the effect of frictional force, friction materials surface temperature in braking procedure raises rapidly, friction materials wear surface strained condition is caused to change, the too high meeting of temperature causes the degraded of friction material matrix resin even viscosity flow to occur, cause the heat fading phenomenon of frictional coefficient, directly can affect the fatigue wear degree of friction materials, therefore select aluminum-silicon ceramic fiber, carbon fiber and potassium titanate crystal whisker as the strongthener of ceramic type friction material, can obviously improve friction materials mechanical property and frictional behaviour.Flyash major ingredient is SiO
2, A1
2o
3, Fe
2o
3, CaO, TiO
2and do not fire C etc., flyash can play the effect increasing frictional coefficient, the flyash of lower aq is not obvious on the impact of friction materials tribological property, the cost of friction materials can be reduced, the wear rate that material is larger but too high levels can cause friction, therefore appropriate flyash can use as the void fillers of friction materials.
Embodiment 1
Step 1, potassium titanate crystal whisker, copper powder, vermiculite, magnesium oxide, modified phenolic resins and paracril, flyash solid material are put into shredder and carried out milled processed;
In step 2, the raw material that obtains in step 1, take respectively according to weight percent: aluminum-silicon ceramic fiber 15g, carbon fiber 11g, potassium titanate crystal whisker 9g, copper powder 5g, vermiculite 13g, magnesium oxide 12g, modified phenolic resins and paracril 16g, flyash 19g;
High speed mixer mixing 3min put into by step 3, raw material step 2 taken, after mixing, and at room temperature coldmoulding;
Step 4: blank step 3 obtained is hot-pressed onto on the steel fiber layer of backsizing, hot pressing pressure is 10MPa, and temperature is 160 DEG C, dwell time 2min;
Step 6: the material obtained in step 5 is put into equipment for Heating Processing, thermal treatment 3h at 180 DEG C of temperature, namely obtains.
Embodiment 2
Step 1, potassium titanate crystal whisker, copper powder, vermiculite, magnesium oxide, modified phenolic resins and paracril, flyash solid material are put into shredder and carried out milled processed;
In step 2, the raw material that obtains in step 1, take respectively according to weight percent: aluminum-silicon ceramic fiber 5.5g, carbon fiber 18.5g, potassium titanate crystal whisker 8g, copper powder 3g, vermiculite 12g, magnesium oxide 15g, modified phenolic resins and paracril 15g, flyash 23g;
High speed mixer mixing 2min put into by step 3, raw material step 2 taken, after mixing, and at room temperature coldmoulding;
Step 4: blank step 3 obtained is hot-pressed onto on the steel fiber layer of backsizing, hot pressing pressure is 10MPa, and temperature is 140 DEG C, dwell time 3min;
Step 6: the material obtained in step 5 is put into equipment for Heating Processing, thermal treatment 4.5h at 170 DEG C of temperature, namely obtains.
Embodiment 3
Step 1, potassium titanate crystal whisker, copper powder, vermiculite, magnesium oxide, modified phenolic resins and paracril, flyash solid material are put into shredder and carried out milled processed;
In step 2, the raw material that obtains in step 1, take respectively according to weight percent: aluminum-silicon ceramic fiber 16.5g, carbon fiber 9.5g, potassium titanate crystal whisker 11g, copper powder 4g, vermiculite 12g, magnesium oxide 8g, modified phenolic resins and paracril 25g, flyash 18g;
High speed mixer mixing 5min put into by step 3, raw material step 2 taken, after mixing, and at room temperature coldmoulding;
Step 4: blank step 3 obtained is hot-pressed onto on the steel fiber layer of backsizing, hot pressing pressure is 10MPa, and temperature is 180 DEG C, dwell time 1min;
Step 6: the material obtained in step 5 is put into equipment for Heating Processing, thermal treatment 3.5h at 200 DEG C of temperature, namely obtains.
Claims (4)
1. a ceramic fiber friction materials, it is characterized in that, according to weight percent, be made up of following feed composition: aluminum-silicon ceramic fiber 5.5% ~ 16.5%, carbon fiber 9.5% ~ 18.5%, potassium titanate crystal whisker 6% ~ 11%, copper powder 3% ~ 5%, vermiculite 12 ~ 17%, magnesium oxide 8% ~ 15%, modified phenolic resins and paracril 15% ~ 25%, flyash 15% ~ 30%, above each weight percentages of components sum is 100%.
2. a preparation method for ceramic fiber friction materials, is characterized in that, concrete steps are as follows:
Step 1, potassium titanate crystal whisker, copper powder, vermiculite, magnesium oxide, modified phenolic resins and paracril, flyash solid material are put into shredder and carried out milled processed;
In step 2, the raw material that obtains in step 1, take respectively according to weight percent: aluminum-silicon ceramic fiber 5.5% ~ 16.5%, carbon fiber 9.5% ~ 18.5%, potassium titanate crystal whisker 6% ~ 11%, copper powder 3% ~ 5%, vermiculite 12 ~ 17%, magnesium oxide 8% ~ 15%, modified phenolic resins and paracril 15% ~ 25%, flyash 15% ~ 30%, above each weight percentages of components sum is 100%;
High speed mixer mixing 2min ~ 5min put into by step 3, raw material step 2 taken, after mixing, and at room temperature coldmoulding;
Step 4: blank step 3 obtained is hot-pressed onto on the steel fiber layer of backsizing, hot pressing pressure is 10MPa, and temperature is 140 DEG C ~ 180 DEG C, dwell time 1 ~ 3min;
Step 6: the material obtained in step 5 is put into equipment for Heating Processing, thermal treatment 3.5h ~ 4.5h at 170 DEG C ~ 200 DEG C temperature, namely obtains.
3. according to the preparation method of ceramic fiber friction materials described in claim 2, it is characterized in that, in step 3, the instrument used is chilling press, and pressure is 10MPa.
4. according to the preparation method of ceramic fiber friction materials described in claim 2, it is characterized in that, in step 4, pressure maintaining period should discharge pressure and low molecular weight gas several times, and the timed interval is 20s, 50s and 80s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461435A (en) * | 2017-07-03 | 2017-12-12 | 马鞍山蓝科再制造技术有限公司 | A kind of braking sheet for automobile |
| CN107586536A (en) * | 2017-09-22 | 2018-01-16 | 北京天宜上佳新材料股份有限公司 | A kind of friction material and by its preparation formed without metal brake block and preparation method thereof |
| CN109469697A (en) * | 2018-12-05 | 2019-03-15 | 北京科技大学 | The copper-based brake pad of bullet train fiber reinforcement and preparation and friction catch performance |
-
2014
- 2014-10-15 CN CN201410546919.0A patent/CN105567159A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461435A (en) * | 2017-07-03 | 2017-12-12 | 马鞍山蓝科再制造技术有限公司 | A kind of braking sheet for automobile |
| CN107586536A (en) * | 2017-09-22 | 2018-01-16 | 北京天宜上佳新材料股份有限公司 | A kind of friction material and by its preparation formed without metal brake block and preparation method thereof |
| CN107586536B (en) * | 2017-09-22 | 2020-05-26 | 北京天宜上佳高新材料股份有限公司 | Friction material, metal-free brake pad prepared from friction material and preparation method of metal-free brake pad |
| CN109469697A (en) * | 2018-12-05 | 2019-03-15 | 北京科技大学 | The copper-based brake pad of bullet train fiber reinforcement and preparation and friction catch performance |
| US11852209B2 (en) | 2018-12-05 | 2023-12-26 | University Of Science And Technology Beijing | Fiber-reinforced copper-based brake pad for high-speed railway train, and preparation and friction braking performance thereof |
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Application publication date: 20160511 |
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