CN107354407A - A kind of heavy load low abrasion copper base friction material and preparation method thereof - Google Patents
A kind of heavy load low abrasion copper base friction material and preparation method thereof Download PDFInfo
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- CN107354407A CN107354407A CN201710438413.1A CN201710438413A CN107354407A CN 107354407 A CN107354407 A CN 107354407A CN 201710438413 A CN201710438413 A CN 201710438413A CN 107354407 A CN107354407 A CN 107354407A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
Abstract
The present invention proposes a kind of heavy load low abrasion copper base friction material and preparation method thereof, and the raw material that the friction material includes following parts by weight forms：The powder of copper powder 50 ~ 65,8 ~ 20 parts of reinforcing agent, 5 ~ 12 parts of friction, lubrication agent, 5 ~ 10 parts of frictional behaviour additive, 2 ~ 5 parts of molybdenum disulfide, the reinforcing agent is the mixture of iron powder, glass putty and titanium valve, and the friction, lubrication agent is the mixture of crystalline flake graphite and short carbon fiber, and the frictional behaviour additive includes silica and carborundum powder.Friction material formulation proposed by the invention is reasonable, the coefficient of friction of friction material is effectively improved, compression strength is high, high load capacity, wear small, high temperature resistant, thermal conductivity is strong, has excellent anticorrosion effect, improve the service life of friction material, noise and vibration are reduced, stability is strong, and preparation method is simple.
Description
Technical field
The present invention relates to friction materials technology field, and in particular to a kind of heavy load low abrasion copper base friction material.
Background technology
Powder metallurgy friction material is using metal and its alloy as matrix, adds friction component and lubricant component, uses powder
Metallurgical technology is made, mainly for the manufacture of friction brakes and the friction plate of slip clutch.Rubbed because the material has
Wipe factor it is high and stably, wearability is good, running-in ability is good, excellent heat conductivity, environmental pollution is small, intensity is high, uses load high and work
Make the advantages that steady reliable, due to the various advantages of powder metallurgy, powder metallurgy relevant enterprise has been applied to automobile industry, dress
The spare and accessory parts in the fields such as standby manufacturing industry, metal industry, Aero-Space, war industry, instrument and meter, hardware ＆ tools, electronic appliance
Production and research, related raw material, auxiliary material production, all kinds of powder Preparation equipments, agglomerating plant manufacture.Product include bearing, gear,
Hard alloy cutter, mould, friction goods etc..In military enterprise, heavy weaponry such as armor-piercing bullet, torpedo etc., aircraft
The brake assemblages such as tank are both needed to produce using PM technique.Automobile metal powder sintered parts have been Chinese powder smelting in recent years
The maximum market of golden industry, about 50% auto parts and components are powder metallurgy parts.
In recent years, Cu-base composites are with its good conduction, heat conduction and frictional behavior, in machining, communications and transportation
It is with a wide range of applications with fields such as micro mechanicses.However, being still suffered from copper base friction material, hardness is low, and material sinters
Consistency afterwards is not high and high some problems of grade of wear rate, the especially application in terms of high-speed railway brake material.It is existing
There is copper base friction material phosphorus content relatively low, either the frictional behaviour of composite or greasy property are all poor, simultaneously
Copper is mutually nonwetting with carbon, and two kinds of material interfaces are with reference to the problems such as poor, the relatively low wear extent of hardness is higher.Based on problem above, make
Obtain the existing needs for preparing MATERIALS METHODS and not adapting to the development of high speed friction reducing material and large-scale industrial production.
Therefore, in view of the above-mentioned problems, the present invention proposes a kind of new technical scheme.
The content of the invention
It is an object of the invention to provide the heavy load low abrasion that a kind of density is appropriate, hardness, compression strength, bending strength are good
Copper base friction material and preparation method thereof.
The present invention is achieved through the following technical solutions：
A kind of heavy load low abrasion copper base friction material, include the raw material composition of following parts by weight：The powder of copper powder 50 ~ 65, enhancing
8 ~ 20 parts of agent, 5 ~ 12 parts of friction, lubrication agent, 5 ~ 10 parts of frictional behaviour additive, 2 ~ 5 parts of molybdenum disulfide, the reinforcing agent are iron
The mixture of powder, glass putty and titanium valve, the friction, lubrication agent are the mixture of crystalline flake graphite and short carbon fiber, the frictional property
Energy additive includes silica and carborundum powder.
Further, a kind of heavy load low abrasion copper base friction material, the raw material composition of following parts by weight is included：Copper powder
50 ~ 65 parts, 3 ~ 10 parts of iron powder, 2 ~ 5 parts of glass putty, 2 ~ 6 parts of titanium valve, 3 ~ 8 parts of crystalline flake graphite, 2 ~ 7 parts of short carbon fiber, silica
2 ~ 6 parts, 3 ~ 5 parts of carborundum, 2 ~ 5 parts of molybdenum disulfide.
Further, content >=99.7% of the copper powder, 74 μm of particle diameter ＜；Content >=98.0% of the iron powder, particle diameter
74 μm of ＜；Content >=99.8% of the titanium valve, 50 μm of particle diameter ＜；Content >=97% of the crystalline flake graphite, particle diameter be 240 ~
350µm；Content >=97% of the silica, particle diameter are 150 ~ 250 μm.
Further, a kind of preparation method of heavy load low abrasion copper base friction material, comprises the following steps：
A, iron powder and copper powder are respectively placed in reduction furnace, reduced under hydrogen atmosphere protection, with eliminate the iron powder and
Oxygen content and processing hardening phenomenon in copper powder；Reduction temperature：Iron powder is 600 ~ 700 DEG C, and copper powder is 350 ~ 450 DEG C, during insulation
Between be 2 ~ 3 hours；Reduced iron powder and copper powder after being reduced；Ball milling：Qualified iron powder will be reduced and copper powder is respectively put into
Ball milling 0.5 ~ 1 hour in ball mill；
B, crystalline flake graphite, short carbon fiber, silica, carborundum and molybdenum disulfide are respectively put into drying baker drying, cooling
It is standby afterwards；
C, each raw material is weighed by above-mentioned raw materials proportioning, then raw material is sequentially placed into V-type batch mixer and is well mixed, mixing 1 ~
1.5 hours, mixed material is obtained after sieving；
D, above-mentioned gained mixed material is fitted into mould, through being pressed into the pressed compact that density is 4.8 ~ 5.2g/cm3；
E, after cold moudling, pressed compact is put into pressure sintering in calcining furnace, protection of the whole out-moded convention pressure sintering process in hydrogen
Lower completion, sintering temperature are 900 ~ 980 DEG C, press to control in 3 ~ 4MPa, after being incubated 2 ~ 4 hours, cool to room temperature with the furnace and come out of the stove,
Post-processing is carried out again can obtain required friction material.
The beneficial effects of the invention are as follows：Friction material formulation proposed by the invention is reasonable, is effectively improved friction material
The coefficient of friction of material, compression strength is high, high load capacity, and abrasion is small, and high temperature resistant, thermal conductivity is strong, has excellent anticorrosion effect, carries
The high service life of friction material, reduces noise and vibration, stability is strong, and preparation method is simple.
Embodiment
The present invention is described further with reference to embodiment.
Embodiment 1
A kind of heavy load low abrasion copper base friction material, include the raw material composition of following parts by weight：50 parts of copper powder, 3 parts of iron powder,
2 parts of glass putty, 2 parts of titanium valve, 3 parts of crystalline flake graphite, 2 parts of short carbon fiber, 2 parts of silica, 3 parts of carborundum, 2 parts of molybdenum disulfide.
A kind of preparation method of heavy load low abrasion copper base friction material, comprises the following steps：
A, iron powder and copper powder are respectively placed in reduction furnace, reduced under hydrogen atmosphere protection, with eliminate the iron powder and
Oxygen content and processing hardening phenomenon in copper powder；Reduction temperature：Iron powder is 600 DEG C, and copper powder is 350 DEG C, and soaking time is 2
Hour；Reduced iron powder and copper powder after being reduced；Ball milling：Qualified iron powder will be reduced and copper powder is respectively put into ball in ball mill
Mill 0.5 hour；
B, crystalline flake graphite, short carbon fiber, silica, carborundum and molybdenum disulfide are respectively put into drying baker drying, cooling
It is standby afterwards；
C, each raw material is weighed by above-mentioned raw materials proportioning, then raw material is sequentially placed into V-type batch mixer and is well mixed, mixing 1 is small
When, obtain mixed material after sieving；
D, above-mentioned gained mixed material is fitted into mould, through being pressed into the pressed compact that density is 4.8g/cm3；
E, after cold moudling, pressed compact is put into pressure sintering in calcining furnace, protection of the whole out-moded convention pressure sintering process in hydrogen
Lower completion, sintering temperature are 900 DEG C, and it is control in 3MPa to press, and after insulation 2 hours, cool to room temperature with the furnace and come out of the stove, then after carrying out
Phase processing can obtain required friction material.
Embodiment 2
A kind of heavy load low abrasion copper base friction material, include the raw material composition of following parts by weight：60 parts of copper powder, 6 parts of iron powder,
4 parts of glass putty, 4 parts of titanium valve, 5 parts of crystalline flake graphite, 5 parts of short carbon fiber, 5 parts of silica, 4 parts of carborundum, 3 parts of molybdenum disulfide.
A kind of preparation method of heavy load low abrasion copper base friction material, comprises the following steps：
A, iron powder and copper powder are respectively placed in reduction furnace, reduced under hydrogen atmosphere protection, with eliminate the iron powder and
Oxygen content and processing hardening phenomenon in copper powder；Reduction temperature：Iron powder is 650 DEG C, and copper powder is 400 DEG C, and soaking time is
2.5 hour；Reduced iron powder and copper powder after being reduced；Ball milling：Qualified iron powder will be reduced and copper powder is respectively put into ball mill
Middle ball milling 0.8 hour；
B, crystalline flake graphite, short carbon fiber, silica, carborundum and molybdenum disulfide are respectively put into drying baker drying, cooling
It is standby afterwards；
C, each raw material is weighed by above-mentioned raw materials proportioning, then raw material is sequentially placed into V-type batch mixer and is well mixed, mixing 1.2
Hour, obtain mixed material after sieving；
D, above-mentioned gained mixed material is fitted into mould, through being pressed into the pressed compact that density is 5g/cm3；
E, after cold moudling, pressed compact is put into pressure sintering in calcining furnace, protection of the whole out-moded convention pressure sintering process in hydrogen
Lower completion, sintering temperature are 950 DEG C, and it is control in 3MPa to press, and after insulation 3 hours, cool to room temperature with the furnace and come out of the stove, then after carrying out
Phase processing can obtain required friction material.
Embodiment 3
A kind of heavy load low abrasion copper base friction material, include the raw material composition of following parts by weight：65 parts of copper powder, iron powder 10
Part, 5 parts of glass putty, 6 parts of titanium valve, 8 parts of crystalline flake graphite, 7 parts of short carbon fiber, 6 parts of silica, 5 parts of carborundum, molybdenum disulfide 5
Part.
A kind of preparation method of heavy load low abrasion copper base friction material, comprises the following steps：
A, iron powder and copper powder are respectively placed in reduction furnace, reduced under hydrogen atmosphere protection, with eliminate the iron powder and
Oxygen content and processing hardening phenomenon in copper powder；Reduction temperature：Iron powder is 700 DEG C, and copper powder is 450 DEG C, and soaking time is 3
Hour；Reduced iron powder and copper powder after being reduced；Ball milling：Qualified iron powder will be reduced and copper powder is respectively put into ball in ball mill
Grind 1h；
B, crystalline flake graphite, short carbon fiber, silica, carborundum and molybdenum disulfide are respectively put into drying baker drying, cooling
It is standby afterwards；
C, each raw material is weighed by above-mentioned raw materials proportioning, then raw material is sequentially placed into V-type batch mixer and is well mixed, mixing 1.5
Hour, obtain mixed material after sieving；
D, above-mentioned gained mixed material is fitted into mould, through being pressed into the pressed compact that density is 5.2g/cm3；
E, after cold moudling, pressed compact is put into pressure sintering in calcining furnace, protection of the whole out-moded convention pressure sintering process in hydrogen
Lower completion, sintering temperature are 980 DEG C, and it is control in 4MPa to press, and after insulation 4 hours, cool to room temperature with the furnace and come out of the stove, then after carrying out
Phase processing can obtain required friction material.
Friction material formulation proposed by the invention is reasonable, is effectively improved the coefficient of friction of friction material, pressure resistance
Degree is high, high load capacity, and abrasion is small, and high temperature resistant, thermal conductivity is strong, has excellent anticorrosion effect, improves the use of friction material
In the life-span, noise and vibration are reduced, stability is strong, and preparation method is simple.
Friction material formulation proposed by the invention is reasonable, is effectively improved the coefficient of friction of friction material, pressure resistance
Degree is high, high load capacity, and abrasion is small, and high temperature resistant, thermal conductivity is strong, has excellent anticorrosion effect, improves the use of friction material
In the life-span, noise and vibration are reduced, stability is strong, and preparation method is simple.
Claims (4)
- A kind of 1. heavy load low abrasion copper base friction material, it is characterised in that：Raw material composition including following parts by weight：Copper powder 50 ~ 65 powder, 8 ~ 20 parts of reinforcing agent, 5 ~ 12 parts of friction, lubrication agent, 5 ~ 10 parts of frictional behaviour additive, 2 ~ 5 parts of molybdenum disulfide are described Reinforcing agent is the mixture of iron powder, glass putty and titanium valve, and the friction, lubrication agent is the mixture of crystalline flake graphite and short carbon fiber, The frictional behaviour additive includes silica and carborundum powder.
- A kind of 2. heavy load low abrasion copper base friction material according to claim 1, it is characterised in that：Including following parts by weight Several raw material compositions：50 ~ 65 parts of copper powder, 3 ~ 10 parts of iron powder, 2 ~ 5 parts of glass putty, 2 ~ 6 parts of titanium valve, 3 ~ 8 parts of crystalline flake graphite, be chopped charcoal 2 ~ 7 parts of fiber, 2 ~ 6 parts of silica, 3 ~ 5 parts of carborundum, 2 ~ 5 parts of molybdenum disulfide.
- A kind of 3. heavy load low abrasion copper base friction material according to claim 2, it is characterised in that：The content of the copper powder 74 μm of >=99.7%, particle diameter ＜；Content >=98.0% of the iron powder, 74 μm of particle diameter ＜；Content >=99.8% of the titanium valve, 50 μm of particle diameter ＜；Content >=97% of the crystalline flake graphite, particle diameter are 240 ~ 350 μm；Content >=97% of the silica, Particle diameter is 150 ~ 250 μm.
- 4. according to a kind of claim 1 ~ 3 preparation method of heavy load low abrasion copper base friction material, it is characterised in that：Bag Include following steps：A, iron powder and copper powder are respectively placed in reduction furnace, reduced under hydrogen atmosphere protection, with eliminate the iron powder and Oxygen content and processing hardening phenomenon in copper powder；Reduction temperature：Iron powder is 600 ~ 700 DEG C, and copper powder is 350 ~ 450 DEG C, during insulation Between be 2 ~ 3 hours；Reduced iron powder and copper powder after being reduced；Ball milling：Qualified iron powder will be reduced and copper powder is respectively put into Ball milling 0.5 ~ 1 hour in ball mill；B, crystalline flake graphite, short carbon fiber, silica, carborundum and molybdenum disulfide are respectively put into drying baker drying, cooling It is standby afterwards；C, each raw material is weighed by above-mentioned raw materials proportioning, then raw material is sequentially placed into V-type batch mixer and is well mixed, mixing 1 ~ 1.5 hours, mixed material is obtained after sieving；D, above-mentioned gained mixed material is fitted into mould, through being pressed into the pressed compact that density is 4.8 ~ 5.2g/cm3；E, after cold moudling, pressed compact is put into pressure sintering in calcining furnace, protection of the whole out-moded convention pressure sintering process in hydrogen Lower completion, sintering temperature are 900 ~ 980 DEG C, press to control in 3 ~ 4MPa, after being incubated 2 ~ 4 hours, cool to room temperature with the furnace and come out of the stove, Post-processing is carried out again can obtain required friction material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299300A (en) * | 2017-08-17 | 2017-10-27 | 苏州曼里尼斯金属科技有限公司 | A kind of heavy load low abrasion copper base friction material and preparation method thereof |
| CN110102754A (en) * | 2019-05-20 | 2019-08-09 | 中南大学 | A kind of heavy-duty vehicle dry clutch copper based powder metallurgy friction material and preparation method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032195A (en) * | 1987-09-19 | 1989-04-05 | 北京摩擦材料厂 | A kind of friction plate and manufacture method thereof |
| CN1594621A (en) * | 2003-09-08 | 2005-03-16 | 郑州轻工业学院 | Copper base powder metallurgical friction material |
| CN101195898A (en) * | 2006-12-08 | 2008-06-11 | 中南大学 | Powder metallurgy aviation brake material for large-scale airplane and producing method thereof |
| CN101724379A (en) * | 2009-11-30 | 2010-06-09 | 大连大学 | Brake graphite-Cu-Fe-Al-based high-temperature self-lubricating composite friction material and preparation method thereof |
| CN103639414A (en) * | 2013-12-13 | 2014-03-19 | 哈尔滨理工大学 | Method for preparing high-hardness and low- abrasion copper-based friction material |
| CN104384501A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Ferrum-based powder metallurgy antifriction material and preparation method thereof |
| CN104384504A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Copper-based powder metallurgy antifriction material and preparation method thereof |
| CN104399967A (en) * | 2014-10-30 | 2015-03-11 | 苏州莱特复合材料有限公司 | Copper base powder metallurgy friction reducing material and preparing method of copper base powder metallurgy friction reducing material |
| CN104480342A (en) * | 2014-12-12 | 2015-04-01 | 贵州新安航空机械有限责任公司 | Anti-corrosion copper-based brake material with high friction coefficient and preparation method of anti-corrosion copper-based brake material |
| CN104525934A (en) * | 2014-12-11 | 2015-04-22 | 来安县隆华摩擦材料有限公司 | Double-copper complex fiber friction plate |
| CN106399743A (en) * | 2016-11-04 | 2017-02-15 | 中南大学 | Super-simple component powder metallurgy friction material for high-speed train brake pad |
| CN106702204A (en) * | 2017-02-17 | 2017-05-24 | 盐城工学院 | Copper-based powder metallurgy friction material and preparation method thereof |
-
2017
- 2017-06-12 CN CN201710438413.1A patent/CN107354407A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032195A (en) * | 1987-09-19 | 1989-04-05 | 北京摩擦材料厂 | A kind of friction plate and manufacture method thereof |
| CN1594621A (en) * | 2003-09-08 | 2005-03-16 | 郑州轻工业学院 | Copper base powder metallurgical friction material |
| CN101195898A (en) * | 2006-12-08 | 2008-06-11 | 中南大学 | Powder metallurgy aviation brake material for large-scale airplane and producing method thereof |
| CN101724379A (en) * | 2009-11-30 | 2010-06-09 | 大连大学 | Brake graphite-Cu-Fe-Al-based high-temperature self-lubricating composite friction material and preparation method thereof |
| CN103639414A (en) * | 2013-12-13 | 2014-03-19 | 哈尔滨理工大学 | Method for preparing high-hardness and low- abrasion copper-based friction material |
| CN104384501A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Ferrum-based powder metallurgy antifriction material and preparation method thereof |
| CN104384504A (en) * | 2014-10-30 | 2015-03-04 | 苏州莱特复合材料有限公司 | Copper-based powder metallurgy antifriction material and preparation method thereof |
| CN104399967A (en) * | 2014-10-30 | 2015-03-11 | 苏州莱特复合材料有限公司 | Copper base powder metallurgy friction reducing material and preparing method of copper base powder metallurgy friction reducing material |
| CN104525934A (en) * | 2014-12-11 | 2015-04-22 | 来安县隆华摩擦材料有限公司 | Double-copper complex fiber friction plate |
| CN104480342A (en) * | 2014-12-12 | 2015-04-01 | 贵州新安航空机械有限责任公司 | Anti-corrosion copper-based brake material with high friction coefficient and preparation method of anti-corrosion copper-based brake material |
| CN106399743A (en) * | 2016-11-04 | 2017-02-15 | 中南大学 | Super-simple component powder metallurgy friction material for high-speed train brake pad |
| CN106702204A (en) * | 2017-02-17 | 2017-05-24 | 盐城工学院 | Copper-based powder metallurgy friction material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299300A (en) * | 2017-08-17 | 2017-10-27 | 苏州曼里尼斯金属科技有限公司 | A kind of heavy load low abrasion copper base friction material and preparation method thereof |
| CN110102754A (en) * | 2019-05-20 | 2019-08-09 | 中南大学 | A kind of heavy-duty vehicle dry clutch copper based powder metallurgy friction material and preparation method thereof |
| CN110102754B (en) * | 2019-05-20 | 2020-04-24 | 中南大学 | Copper-based powder metallurgy friction material for dry clutch of heavy-duty vehicle and preparation method thereof |
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