CN109780102A - A kind of preparation method of motorbus graphene modified aluminas fibre reinforced composites brake block - Google Patents
A kind of preparation method of motorbus graphene modified aluminas fibre reinforced composites brake block Download PDFInfo
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- CN109780102A CN109780102A CN201811646534.6A CN201811646534A CN109780102A CN 109780102 A CN109780102 A CN 109780102A CN 201811646534 A CN201811646534 A CN 201811646534A CN 109780102 A CN109780102 A CN 109780102A
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- brake block
- motorbus
- reinforced composites
- fibre reinforced
- graphene modified
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Abstract
The invention discloses a kind of motorbus preparation methods of graphene modified aluminas fibre reinforced composites brake block, this method are as follows: one, using chopped alumina fibre, copper powder, boron nitride, carborundum powder, powdered carbon, graphite powder and resin as main raw material(s), and add suitable grapheme material；Two, alumina fibre mixture is configured by a certain percentage；Three, press curing forms；Four, charing process；Five, high-temperature process；Six, after being machined, motorbus graphene modified aluminas fibre reinforced composites brake block is made.The present invention is using the alumina fibre that is chopped as reinforcement, resin is as bonding agent, copper powder is as conductive filler material, graphite powder is as lubricant, boron nitride, the wearability of carborundum powder and graphene have the characteristics that motorbus graphene modified aluminas fibre reinforced composites brake block prepared by high strength & high electric-conduction and high thermal conductivity, has many advantages, such as excellent in mechanical performance, high mechanical strength, toughness are good, wearability is good, long service life.
Description
Technical field
The present invention discloses a kind of preparation method of motorbus brake pad material, belongs to brake pad material technical field.
Background technique
As automotive engineering is applied to environmental protection, the development of high speed and overload direction, to the stability of brake system of car and
Reliability proposes requirements at the higher level, and the comprehensive performance of brake block friction material will directly influence in vehicle traveling process
It is safe and comfortable.The essence of automobile brake is that the most kinetic energy of automobile is passed through between brake block and brake disc (or drum)
Friction is converted into thermal energy, and most thermal energy causes the raised process of temperature by brake absorption again.Heavy-duty car is due to load-carrying
Tonnage is larger and the raising of speed, and inertia when than the braking of general small and medium-sized car is big, braking distance is long.Heavy-duty car friction
The high temperature resistance of material will be got well, and coefficient of friction should not be too high, otherwise brake temperature can be made to steeply rise, in disc surface
The carburization zone for generating stick-slip causes coefficient of friction to generate decline, braking effect is not achieved, and vehicle slip, overturning is caused, to driving
Safety constitutes a serious threat.Therefore, the friction material of heavy-duty car is in addition to good mechanical strength, lesser dual face mill
Except damaging, being nuisanceless, nontoxic, should more there be good thermal stability, making brake block, coefficient of friction changes small, thermal wear at high temperature
It is small, reduce the noise pollution to environment.Brake block friction material belongs to friction resistance composite material, mainly fine by binder, enhancing
Dimension, filler and four part of frictional property regulator composition.Each component selects proportion material in composite material, mixed by different proportion
It closes, using hot pressing or cold pressing production technology production, thus obtains meeting different coefficients of friction, wear rate, mechanical strength, porosity
The brake block of equal requirements.Over the past decade, develop with auto industry to the direction of environmental protection, green, domestic and international brake block friction
Investigation of materials and application have entered no asbestos stage.Brake block in the heavy-duty car turnover rate compared with small and medium-sized car
Height, use cost are high, therefore, by development of new material prescription and are improving technique and improve comprehensive performance and service life
Simultaneously, it is necessary to take into account economical and practical principle.Currently, the domestic brake block friction material for heavy-duty car largely uses
Semimetal powders mentioned metallurgical material, performance characteristics are to be provided with good thermal conductivity and higher intensity, the braking temperature that can be carried
Degree reaches 400 DEG C.But since brake pressure is big when braking, lead to brake drum or brake disc surface serious wear, wearability
Poor, brake noise increases.
Fibre reinforced composites have low, the high mechanical strength of density, high toughness, wear-resisting and corrosion-resistant
Performance can be applied to motorbus friction material, and be greatly improved the security performance of motorbus.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, to solve existing motorbus brake block heat transmitting and heat-resisting
Poor, the unstable technical problem for causing brake block coefficient of friction unstable of material of property, and a kind of simple process, densification effects are provided
The preparation method of the motorbus brake block of good, high mechanical strength, wearability and excellent heat resistance.
To achieve the goals above, the technical scheme adopted by the invention is that: a kind of motorbus modified oxygen of graphene
Change the preparation method of aluminum fiber enhancing composite material brake block, it is characterised in that method includes the following steps:
Step 1: using be chopped alumina fibre, copper powder, boron nitride, carborundum powder, carbon dust, graphite powder and resin as main
Raw material.
Step 2: being stirred in agitator tank after material in step 1 is weighed in proportion, agitator tank heating temperature
40 DEG C -70 DEG C, mixing time 2h-6h.
Step 3: the mixture being stirred in step 2 is placed in designed mold, is pressed on multidaylight press
Type, pressure 23Mpa-53Mpa.
Step 4: the semi-finished product of compression moulding in step 3 being placed in retort and carry out charing process, and carbonization temperature is
830℃-930℃。
Step 5: the semi-finished product after charing process in step 4 are subjected to high-temperature process, treatment temperature under vacuum conditions
It is 1230 DEG C -1430 DEG C.
Step 6: the composite body that step 5 is come out of the stove is after over mechanical processing, obtained motorbus graphene
Modified aluminas fibre reinforced composites brake block.
A kind of preparation method of above-mentioned motorbus graphene modified aluminas fibre reinforced composites brake block,
It is characterized in that, chopped alumina fibre length described in step 1 be 17mm-27mm, copper powder, boron nitride, carborundum powder,
Powdered carbon, graphite powder granular size be 450 mesh hereinafter, resin is phenolic resin or epoxy resin.
A kind of preparation method of above-mentioned motorbus graphene modified aluminas fibre reinforced composites brake block,
It is characterized in that, alumina fibre weight percent described in step 2 is 10wt%-47wt%, copper powder weight percent is
1wt%-5wt%, boron nitride weight percent are 1wt%-6wt%, and carborundum powder weight percent is 1wt%-6wt%, powdered carbon weight
Percentage is 5wt%-15wt%, and graphite powder weight percent is 3wt%-15wt%, and weight resin percentage is 20wt%-50wt%,
Graphene additive amount is 0.05 wt%-1.0 wt%.
A kind of preparation method of above-mentioned motorbus graphene modified aluminas fibre reinforced composites brake block,
It is characterized in that, press curing technique described in step 3, heating rate is 4 DEG C/h-14 DEG C/h, solidification temperature is 150 DEG C-
250 DEG C, soaking time 2.0h-5.0h.
A kind of preparation method of above-mentioned motorbus graphene modified aluminas fibre reinforced composites brake block,
It is characterized in that, carbonization heating rate described in step 4 is 4 DEG C/h-24 DEG C/h, soaking time 2.0h-5.0h.
A kind of preparation method of above-mentioned motorbus graphene modified aluminas fibre reinforced composites brake block,
It is characterized in that, high-temperature process heating rate described in step 5 be 4 DEG C/h-14 DEG C/h, soaking time 1.0h-3.0h,
High-temperature vacuum degree is less than 4.0 × 10-3Pa。
Compared with the prior art, the present invention has the following advantages:
1, compared with the technology of preparing of traditional motorbus brake block, the present invention using the alumina fibre that is chopped as reinforcement,
Resin is as bonding agent, and copper powder is as conductive filler material, and graphite powder is as lubricant, the wearability of boron nitride, carborundum powder
And graphene has the characteristics that the motorbus modified oxygen of graphene prepared by high strength & high electric-conduction and high thermal conductivity
Changing aluminum fiber enhances composite material brake block, has excellent in mechanical performance, high mechanical strength, toughness are good, wearability is good,
The advantages that long service life.
2, present invention process is simple, and is easy to produce in enormous quantities, and solves existing motorbus brake block heat transmitting
And poor heat resistance, the unstable technical problem for causing coefficient of friction unstable of material.
Detailed description of the invention
Fig. 1 is the technique that the present invention prepares motorbus graphene modified aluminas fibre reinforced composites brake block
Flow diagram.
Specific embodiment
Embodiment 1
Step 1: using be chopped alumina fibre, copper powder, boron nitride, carborundum powder, carbon dust, graphite powder and resin as main
Raw material, the alumina fibre length that is chopped are 17mm, and copper powder, boron nitride, carborundum powder, powdered carbon, the granular size of graphite powder are equal
For 500 mesh, resin is phenolic resin.
Step 2: it is 10wt% that material in step 1, which is pressed alumina fibre weight percent, and copper powder weight percent is
5wt%, boron nitride weight percent are 5wt%, and carborundum powder weight percent is 6wt%, and powdered carbon weight percent is 15wt%, stone
Ink powder weight percent is 8.95wt%, and weight resin percentage is 50wt%, and graphene additive amount is 0.05 wt%, after weighing
It is stirred in agitator tank, 40 DEG C of agitator tank heating temperature, mixing time 2h.
Step 3: the mixture being stirred in step 2 is placed in designed mold, is pressed on multidaylight press
Type, pressure 23Mpa, heating rate are 4 DEG C/h, and solidification temperature is 150 DEG C, soaking time 5.0h.
Step 4: the semi-finished product of compression moulding in step 3 being placed in retort and carry out charing process, and carbonization temperature is
830 DEG C, carbonization heating rate is 4 DEG C/h, soaking time 5.0h.
Step 5: the semi-finished product after charing process in step 4 are subjected to high-temperature process, treatment temperature under vacuum conditions
It is 1230 DEG C, heating rate is 4 DEG C/h, and soaking time 3.0h, high-temperature vacuum degree is less than 4.0 × 10-3Pa。
Step 6: the composite body that step 5 is come out of the stove is after over mechanical processing, obtained motorbus graphene
Modified aluminas fibre reinforced composites brake block.
Embodiment 2
Step 1: using be chopped alumina fibre, copper powder, boron nitride, carborundum powder, carbon dust, graphite powder and resin as main
Raw material, the alumina fibre length that is chopped are 22mm, and copper powder, boron nitride, carborundum powder, powdered carbon, the granular size of graphite powder are equal
For 550 mesh, resin is epoxy resin.
Step 2: it is 30wt% that material in step 1, which is pressed alumina fibre weight percent, and copper powder weight percent is
3wt%, boron nitride weight percent are 3wt%, and carborundum powder weight percent is 4wt%, powdered carbon weight percent 9.5wt%, stone
Ink powder weight percent is 3wt%, and weight resin percentage is 47wt%, and graphene additive amount is 0.5 wt%, is being stirred after weighing
It mixes in tank and is stirred, 50 DEG C of agitator tank heating temperature, mixing time 5h.
Step 3: the mixture being stirred in step 2 is placed in designed mold, is pressed on multidaylight press
Type, pressure 35Mpa, heating rate are 10 DEG C/h, and solidification temperature is 200 DEG C, soaking time 3.0h.
Step 4: the semi-finished product of compression moulding in step 3 being placed in retort and carry out charing process, and carbonization temperature is
880 DEG C, carbonization heating rate is 20 DEG C/h, soaking time 3.0h.
Step 5: the semi-finished product after charing process in step 4 are subjected to high-temperature process, treatment temperature under vacuum conditions
It is 1300 DEG C, heating rate is 10 DEG C/h, and soaking time 2.0h, high-temperature vacuum degree is less than 4.0 × 10-3Pa。
Step 6: the composite body that step 5 is come out of the stove is after over mechanical processing, obtained motorbus graphene
Modified aluminas fibre reinforced composites brake block.
Embodiment 3
Step 1: using be chopped alumina fibre, copper powder, boron nitride, carborundum powder, carbon dust, graphite powder and resin as main
Raw material, the alumina fibre length that is chopped are 27mm, and copper powder, boron nitride, carborundum powder, powdered carbon, the granular size of graphite powder are equal
For 600 mesh, resin is epoxy resin.
Step 2: it is 47wt% that material in step 1, which is pressed alumina fibre weight percent, and copper powder weight percent is
1wt%, boron nitride weight percent are 2wt%, and carborundum powder weight percent is 1wt%, and powdered carbon weight percent is 5wt%, stone
Ink powder weight percent be 14wt%, weight resin percentage be 29wt%, graphene additive amount be 1.0 wt%, after weighing
It is stirred in agitator tank, 70 DEG C of agitator tank heating temperature, mixing time 6h.
Step 3: the mixture being stirred in step 2 is placed in designed mold, is pressed on multidaylight press
Type, pressure 53Mpa, heating rate are 14 DEG C/h, and solidification temperature is 250 DEG C, soaking time 2.0h.
Step 4: the semi-finished product of compression moulding in step 3 being placed in retort and carry out charing process, and carbonization temperature is
930 DEG C, carbonization heating rate is 24 DEG C/h, soaking time 2.0h.
Step 5: the semi-finished product after charing process in step 4 are subjected to high-temperature process, treatment temperature under vacuum conditions
It is 1430 DEG C, heating rate is 14 DEG C/h, and soaking time 1.0h, high-temperature vacuum degree is less than 4.0 × 10-3Pa。
Step 6: the composite body that step 5 is come out of the stove is after over mechanical processing, obtained motorbus graphene
Modified aluminas fibre reinforced composites brake block.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification, change and equivalent structure transformation to the above embodiments, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (6)
1. a kind of motorbus preparation method of graphene modified aluminas fibre reinforced composites brake block, feature exist
In method includes the following steps:
Step 1: using be chopped alumina fibre, copper powder, boron nitride, carborundum powder, carbon dust, graphite powder and resin as main
Raw material, and add suitable grapheme material；
Step 2: being stirred in agitator tank after material in step 1 is weighed in proportion, 40 DEG C of agitator tank heating temperature-
70 DEG C, mixing time 2h-6h；
Step 3: the mixture being stirred in step 2 is placed in designed mold, the compression moulding on multidaylight press, pressure
Power is 23Mpa-53 Mpa；
Step 4: the semi-finished product of compression moulding in step 3 being placed in retort and carry out charing process, carbonization temperature 830
℃-930℃；
Step 5: the semi-finished product after charing process in step 4 are subjected to high-temperature process under vacuum conditions, treatment temperature is
1230℃-1430℃；
Step 6: it is modified with graphene that motorbus is made after over mechanical processing in the composite body that step 5 is come out of the stove
Alumina fibre enhances composite material brake block.
2. a kind of motorbus according to claim 1 graphene modified aluminas fibre reinforced composites brake block
Preparation method, which is characterized in that chopped alumina fibre length described in step 1 be 17mm-27mm, copper powder, nitridation
Boron, carborundum powder, powdered carbon, graphite powder granular size be 450 mesh hereinafter, resin is phenolic resin or epoxy resin.
3. a kind of motorbus according to claim 1 graphene modified aluminas fibre reinforced composites brake block
Preparation method, which is characterized in that alumina fibre weight percent described in step 2 be 10wt%-47wt%, copper powder weight
Amount percentage is 1wt%-5wt%, and boron nitride weight percent is 1wt%-6wt%, and carborundum powder weight percent is 1wt%-
6wt%, powdered carbon weight percent are 5wt%-15wt%, and graphite powder weight percent is 3wt%-15wt%, and weight resin percentage is
20wt%-50wt%, graphene additive amount are 0.05 wt%-1.0 wt%.
4. a kind of motorbus according to claim 1 graphene modified aluminas fibre reinforced composites brake block
Preparation method, which is characterized in that press curing technique described in step 3, heating rate be 4 DEG C/h-14 DEG C/h, solidification
Temperature is 150 DEG C -250 DEG C, soaking time 2.0h-5.0h.
5. a kind of motorbus according to claim 1 graphene modified aluminas fibre reinforced composites brake block
Preparation method, which is characterized in that carbonization heating rate described in step 4 is 4 DEG C/h-24 DEG C/h, and soaking time is
2.0h-5.0h。
6. a kind of motorbus according to claim 1 graphene modified aluminas fibre reinforced composites brake block
Preparation method, which is characterized in that high-temperature process heating rate described in step 5 is 4 DEG C/h-14 DEG C/h, and soaking time is
1.0h-3.0h, high-temperature vacuum degree is less than 4.0 × 10-3Pa。
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| CN201811646534.6A CN109780102A (en) | 2018-12-30 | 2018-12-30 | A kind of preparation method of motorbus graphene modified aluminas fibre reinforced composites brake block |
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| CN201811646534.6A CN109780102A (en) | 2018-12-30 | 2018-12-30 | A kind of preparation method of motorbus graphene modified aluminas fibre reinforced composites brake block |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944484A (en) * | 2020-08-04 | 2020-11-17 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | Cubic boron nitride intercalated graphene non-metallic material and preparation method thereof |
| CN112662128A (en) * | 2020-12-11 | 2021-04-16 | 杭州安耐特实业有限公司 | High-strength low-noise friction material |
| CN114854108A (en) * | 2022-05-11 | 2022-08-05 | 深圳市汉森姆新材料有限公司 | Aramid graphene modified heat-dissipation wear-resistant brake pad and preparation method thereof |
-
2018
- 2018-12-30 CN CN201811646534.6A patent/CN109780102A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944484A (en) * | 2020-08-04 | 2020-11-17 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | Cubic boron nitride intercalated graphene non-metallic material and preparation method thereof |
| CN112662128A (en) * | 2020-12-11 | 2021-04-16 | 杭州安耐特实业有限公司 | High-strength low-noise friction material |
| CN114854108A (en) * | 2022-05-11 | 2022-08-05 | 深圳市汉森姆新材料有限公司 | Aramid graphene modified heat-dissipation wear-resistant brake pad and preparation method thereof |
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Application publication date: 20190521 |