CN108220666A - A kind of more resistant novel copper-based self-lubricating composite - Google Patents
A kind of more resistant novel copper-based self-lubricating composite Download PDFInfo
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- CN108220666A CN108220666A CN201810034091.9A CN201810034091A CN108220666A CN 108220666 A CN108220666 A CN 108220666A CN 201810034091 A CN201810034091 A CN 201810034091A CN 108220666 A CN108220666 A CN 108220666A
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- Prior art keywords
- powder
- hbn
- based self
- lubricating composite
- novel copper
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of more resistant novel copper-based self-lubricating composite count by weight percentage, is prepared by 97.5~98.5% tin bronze powder and 1.5~2.5% hBN powder, and the mass percent summation of above-mentioned each component is 100%.The preparation method of the composite material is as follows：By the weight percent accurate weighing tin bronze powder and hBN powder, it is put into hopper and mixes 3~6 hours, obtain composite powder；With the two-way compacting composite powder of hydraulic press, pressing process includes first slow precharge, then carries out Quick-pressing, obtains pressurised samples, protects lower sintering pressure sample with argon gas under normal pressure；Sintering temperature maintains 850 DEG C, after being sintered 4h, after product cools to 200 DEG C with the furnace under protection of argon gas, is air-cooled to room temperature.When sample is free of boron nitride, friction coefficient is relatively large, and larger fluctuation occurs for friction coefficient in friction process.After adding in hBN, the friction coefficient of sample is remarkably decreased.
Description
Technical field
The present invention relates to a kind of composite material, specifically a kind of more resistant novel copper-based self-lubricating composite.
Background technology
Copper radical self-lubricating composite material is always the important component of metal-based self-lubricating composite material, is to solve 400-
The main material of industrial tribology problem at 600 DEG C.Tin bronze therein has excellent thermal conductivity, machinability and frictional property
The characteristics such as energy, have obtained extensive concern and application.Particularly made with powdered metallurgy of tin and bronze/graphite self-lubricating composite material
Bearing, bushing and sleeve, under conditions of room temperature with few oil lubrication or oil-free lubrication, there is good thermal conductivity and frictional property
The advantages that energy, it is widely used to textile machine, pharmaceutical machine, food machinery and auto industry center.
But bearing, bushing and the set made with the enhancing of environmental consciousness, one graphite self-lubricating composite material of tin bronze
Cylinder often leads to the problem of black abrasive dust during use and gradually causes attention.Novel self-lubricating material friction component
Research and development also therefore as realizing a weight of operating technology under Developing High-speed, high temperature, oil-free or few Oil Lubrication Condition
It will aspect.And the graphite added in tin bronze significantly reduces the mechanical property of tin bronze, and limit this kind of material should
Use range.
HBN has to the significant facilitation of the friction material of high-temperature self-lubrication performance, and hBN have to graphite it is similar
Lattice and structure, and it will not cause black pollution when in use.
In addition, lead be also it is a kind of be distributed in it is copper-based in soft metal；Therefore, it plays lubrication at high temperature and reduction
The effect of friction can significantly improve the high temperature friction performance of material；But lead is due to the significant damage to human body and environment,
It is not an environmentally friendly selection.Therefore, novel self-lubricating composite material contain low concentration lead or it is unleaded should be following hair
Exhibition.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of preparation methods of novel copper-based self-lubricating composite, should
Material still has good profit under 400-600 DEG C, few oil lubrication or the operating condition of oil-free lubrication and high speed (5000r/min)
Effect is slided, and the generation of black pollution object is avoided using the self-lubricating material.
To achieve these goals, present invention employs following technical schemes：
A kind of more resistant novel copper-based self-lubricating composite, count by weight percentage, by 97.5~98.5%
Tin bronze powder and 1.5~2.5% hBN powder are prepared, and the mass percent summation of above-mentioned each component is 1 percent
Hundred.
A kind of preparation method of the more resistant novel copper-based self-lubricating composite, includes the following steps：
By the weight percent accurate weighing tin bronze powder and hBN powder, it is put into hopper and mixes 3~6 hours, obtain
To composite powder；
Composite powder is packed into mold, then using the two-way compacting of hydraulic press, pressing process includes first slow precharge, then into
Row Quick-pressing, obtains pressurised samples, notices ensureing that air has time enough effusion while sample hardens；
Under normal pressure tubular heater sintering pressure sample is used under argon gas protection；Sintering temperature maintains 850 DEG C, burns
After tying 4h, after product cools to 200 DEG C with the furnace under protection of argon gas, it is air-cooled to room temperature.
The granularity of the tin bronze powder and hBN powder is 150~250 mesh.
Slow precharge is 8Mpa using pressure.
Quick-pressing is 400Mpa using pressure.
Compared with prior art, the advantageous effect that the present invention has：
When sample is free of boron nitride, friction coefficient is relatively large, and friction coefficient generation is larger in friction process
Fluctuation.After adding in hBN, the friction coefficient of sample is remarkably decreased.Friction coefficient is larger when wear test starts, after a few minutes,
HBN solid lubricant films are formed in friction surface, friction coefficient is made to tend towards stability.The wear extent of sleeve containing 0%HBN reaches
0.68mg/m, this is the greatest wear amount of any sample.The wear extent of sleeve significantly reduces in the sample containing boron nitride.Contain
The wear extent of 2%hBN samples is 0.15mg/m, and the wear extent containing 4%hBN samples increases to 0.21mg/m.Although contain
The friction coefficient for having 4%hBN samples is relatively low, but the addition of hBN reduces the wearability of Cu-base composites.This phenomenon table
It is bright：Addition hBN can improve the tribological property of tin bronze as kollag, but it can also reduce the wear-resisting of tin bronze
Property.Therefore, the mass fraction that hBN is added in tin bronze should be controlled 1.5~2.5%.
Specific embodiment
Technical scheme of the present invention is further elaborated below by embodiment.
Embodiment 1
ZQSn663- tin bronze powder contains 6% Sn, 6% Zn, 3% Pb and 85% Cu,
The granularity of ZQSn663 and hBN is each about 200 mesh.
The density of hBN is 2.28g/cm3。
Powdery components have carried out accurate weighing using electronic balance, then mix 3~6 in a hopper
Hour, for producing composite powder.Composite powder is packed into mold, then using the electronic two-way compacting of DY20 hydraulic presses.Compacting
Process includes first slow precharge (using pressure 8MPa), secondly the method for a Quick-pressing (using pressure 400MPa).Note
It is intended to ensure that air has time enough effusion while sample hardens.Using tubular heater under normal pressure and hydrogen shield
Lower sintering pressure sample.Sintering temperature maintains 850 DEG C, and after being sintered 4h, product cools to 200 DEG C with the furnace under protection of argon gas
Afterwards, it is air-cooled to room temperature.
Technical principle：
It is learnt from embodiment 1：With the increase of hBN contents, the quantity of stomata and hBN in composite material increases；Gas
The increase in hole shows the difference between hBN and the physical property of copper alloy, and boron nitride has weight to the density for being sintered tin bronze particle
It influences.The boron nitride content of sintered composite materials is bigger, and the density of sintered composite materials is lower.When copper radical self-lubricating composite wood
When material is as friction material, hBN forms one layer of solid lubricant film under the shearing action of friction surface, and lubrication mechanism is similar to
Graphite film improves the frictional behaviour of material.
HBN contents are higher, and the hBN volumes of Dispersed precipitate are bigger in tin bronze matrix.Which has limited the formation of sintering neck
And growth, the density of copper alloy/hBN self-lubricating composites significantly reduce, porosity increases.Boron nitride content is higher, compound
Material is more likely to form lubricating film, and friction coefficient is lower.However, mechanical performance has negative effect, lubricating film is more vulnerable to damage,
Increase so as to cause self-lubricating composite sleeve wears away amount.
Under conditions of same process, when addition hBN contents reach 2% in ZQSn663- tin bronzes, self-lubricating is compound
Material shows best mechanical performance, hardness 54-56HV, breaking strength 300-304Mpa, density 7.07g/cm3,
Possess the minimal wear amount of relatively small friction coefficient and test sample.
Different from graphite or lead, although graphite has similar lubrication mechanism to hBN, graphite can use process
Middle generation black pollution；Although lead can also significantly improve the high temperature friction performance of material, lead is due to human body and environment
Significant damage, be not an environmentally friendly selection.
Embodiment 2
A kind of more resistant novel copper-based self-lubricating composite, count by weight percentage, by 97.5% tin bronze
Powder and 2.5% hBN powder are prepared.
Embodiment 3
A kind of more resistant novel copper-based self-lubricating composite, count by weight percentage, by 98.5% tin bronze
Powder and 1.5% hBN powder are prepared.
Embodiment 4
A kind of more resistant novel copper-based self-lubricating composite, count by weight percentage, by 98% tin bronze powder
End and 2% hBN powder are prepared.
Claims (5)
1. a kind of more resistant novel copper-based self-lubricating composite, which is characterized in that count by weight percentage, by 97.5~
98.5% tin bronze powder and 1.5~2.5% hBN powder are prepared, and the mass percent summation of above-mentioned each component is
100 percent.
2. a kind of preparation method of more resistant novel copper-based self-lubricating composite as described in claim 1, feature exist
In including the following steps：
By the weight percent accurate weighing tin bronze powder and hBN powder, it is put into hopper and mixes 3~6 hours, answered
Close powder；
Composite powder is packed into mold, then using the two-way compacting of hydraulic press, pressing process includes first slow precharge, then carries out fast
Speed pressurization, obtains pressurised samples, notices ensureing that air has time enough effusion while sample hardens；
Lower sintering pressure sample is protected with argon gas under normal pressure；Sintering temperature maintains 850 DEG C, and after being sintered 4h, product is in argon gas
After cooling to 200 DEG C under protection with the furnace, it is air-cooled to room temperature.
3. the preparation method of more resistant novel copper-based self-lubricating composite as claimed in claim 2, which is characterized in that institute
The granularity for stating tin bronze powder and hBN powder is 150~250 mesh.
4. the preparation method of more resistant novel copper-based self-lubricating composite as claimed in claim 2, which is characterized in that slow
Precharge is 8Mpa using pressure.
5. the preparation method of more resistant novel copper-based self-lubricating composite as claimed in claim 2, which is characterized in that fast
Speed pressurization is 400MDa using pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034091.9A CN108220666A (en) | 2018-01-12 | 2018-01-12 | A kind of more resistant novel copper-based self-lubricating composite |
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| CN201810034091.9A CN108220666A (en) | 2018-01-12 | 2018-01-12 | A kind of more resistant novel copper-based self-lubricating composite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280792A (en) * | 2018-09-17 | 2019-01-29 | 西安理工大学 | Preparation method with low-friction coefficient BN/Cu composite material |
| CN111570807A (en) * | 2020-04-26 | 2020-08-25 | 浙江长盛滑动轴承股份有限公司 | Wormhole type graphite filling structure wear-resisting plate and preparation method thereof |
| CN113134615A (en) * | 2021-03-17 | 2021-07-20 | 西安理工大学 | Method for preparing antifriction and wear-resistant BN/CuSn10 powder by atomizing and pulverizing plasma rotating electrode |
| CN113913644A (en) * | 2021-10-18 | 2022-01-11 | 河南科技大学 | Novel copper-based composite material and preparation method thereof |
Citations (3)
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|---|---|---|---|---|
| CN1353205A (en) * | 2001-10-25 | 2002-06-12 | 中国科学院兰州化学物理研究所 | Self-lubricating composite metal material |
| CN1367269A (en) * | 2001-10-25 | 2002-09-04 | 中国科学院兰州化学物理研究所 | Metal self-lubricating composite material |
| CN105765246A (en) * | 2013-11-27 | 2016-07-13 | 艾默生环境优化技术有限公司 | Bearing performance for compressors using high energy refrigerants with sulfur-based oil additives |
-
2018
- 2018-01-12 CN CN201810034091.9A patent/CN108220666A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353205A (en) * | 2001-10-25 | 2002-06-12 | 中国科学院兰州化学物理研究所 | Self-lubricating composite metal material |
| CN1367269A (en) * | 2001-10-25 | 2002-09-04 | 中国科学院兰州化学物理研究所 | Metal self-lubricating composite material |
| CN1142306C (en) * | 2001-10-25 | 2004-03-17 | 中国科学院兰州化学物理研究所 | Self-lubricating composite metal material |
| CN105765246A (en) * | 2013-11-27 | 2016-07-13 | 艾默生环境优化技术有限公司 | Bearing performance for compressors using high energy refrigerants with sulfur-based oil additives |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280792A (en) * | 2018-09-17 | 2019-01-29 | 西安理工大学 | Preparation method with low-friction coefficient BN/Cu composite material |
| CN109280792B (en) * | 2018-09-17 | 2020-08-18 | 西安理工大学 | Preparation method of BN/Cu composite material with low friction coefficient |
| CN111570807A (en) * | 2020-04-26 | 2020-08-25 | 浙江长盛滑动轴承股份有限公司 | Wormhole type graphite filling structure wear-resisting plate and preparation method thereof |
| CN111570807B (en) * | 2020-04-26 | 2022-09-30 | 浙江长盛滑动轴承股份有限公司 | Preparation method of worm-type graphite filling structure wear-resisting plate |
| CN113134615A (en) * | 2021-03-17 | 2021-07-20 | 西安理工大学 | Method for preparing antifriction and wear-resistant BN/CuSn10 powder by atomizing and pulverizing plasma rotating electrode |
| CN113913644A (en) * | 2021-10-18 | 2022-01-11 | 河南科技大学 | Novel copper-based composite material and preparation method thereof |
| CN113913644B (en) * | 2021-10-18 | 2022-12-13 | 河南科技大学 | Copper-based composite material and preparation method thereof |
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Application publication date: 20180629 |