CN101219476A - Process for producing nano-carbon tube reinforced stephanoporate oil-retaining bearing - Google Patents
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Abstract
The invention discloses a preparation method of reinforcement porous self-lubricating bearing of carbon nanotubes, which is characterized in that according to weight percentage, 0.5-5.0wt percent of carbon nanotubes, surface of which are processed, 99.5-95.0wt percent of metal powder and appropriate dispersant are sent into a mortarboard to be manually ground or are ball milled and uniformly mixed in a ball grinder; then the obtained material is put into a dryer oven to be dried and sent into a forming mould; under the pressure of 0.8-1.0T, prefabrication is made, which is then sent into a sintering oven and burnt in NH3 decomposed atmosphere under temperature of 760-890 DEG C for 2-3 hours; then the burnt bearing is finished under pressure of 0.8-1.0T and oiled for 15-30min; and thereby the porous self-lubricating bearing of carbon nanotubes reinforcement is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of nano-carbon tube reinforced stephanoporate oil-retaining bearing, particularly CNT strengthens the preparation method of copper tinbase, iron copper base or copper clad iron-based stephanoporate oil-retaining bearing, belongs to the preparation field of stephanoporate oil-retaining bearing.
Background technology
Thereby stephanoporate oil-retaining bearing is a kind of bearing that can directly store lubricating oil realization self-lubricating.Its matrix is processed to the structure of porous, has certain permeability, makes the back and is flooded with lubricating oil, lubricating oil is filled in the hole of matrix stores.When bearing operation, lubricating oil oozes out from hole, lubricated working surface; When shutting down, lubricant is got back in the porous matrix again and is stored.In the work, therefore the bleeding of lubricant amount seldom need not make-up oil in the work, and oiliness bearing still can operate as normal.But under the working condition of high rotating speed, high-mechanic, oiliness bearing must have good self-lubricating property and high radial crushing strength, oiliness bearing commonly used can't satisfy this requirement (Sun Yongan, Zhang Ling, Lee county brightness, Wang Xuhong. the research of high speed self-lubricating oily bearing, PM technique, 2002,20 (2): 90).
CNT (CNTs) is a kind of One-dimensional Quantum material with special construction (radial dimension is a nanometer scale, and axial dimension is that all seal basically at micron dimension, pipe two ends).It is the seamless nanoscale pipe that is curled and formed by the single or multiple lift graphite flake, and the distance that is maintained fixed between layer and the layer is about 0.34nm, and diameter is generally 2～20nm.CNT is divided into SWNT (SWNTs) and multiple-wall carbon nanotube (MWNTs).Because CNT is by C-C covalent bond (chemical bond that nature is the most stable) be combined into, and CNT is the cage shape thing of hollow and the topology configuration with sealing, therefore, compare with traditional carbon fiber, have the intensity height, toughness is big, the Young's modulus height, the flexural strength advantages of higher can be used as the enhancing body functional material of composite.Now be widely used in strengthening Metal Substrate, polymer base, ceramic matric composite (Liu Zheng, Zhao Su. CNT reinforced composite progress. aerospace material technology, 2005, (1): 2～4).But do not see the report that has CNT to be used for stephanoporate oil-retaining bearing.
Summary of the invention
The preparation method who the objective of the invention is to be directed to the deficiencies in the prior art and a kind of nano-carbon tube reinforced stephanoporate oil-retaining bearing is provided, be characterized in utilizing CNT to have the intensity height, the toughness height, advantages such as flexural strength height and capillary absorption, use fibre-reinforced mechanism, make the oiliness bearing performance of adding CNT obtain very big improvement.
Purpose of the present invention is realized by following measure.
The preparation method of nano-carbon tube reinforced stephanoporate oil-retaining bearing may further comprise the steps:
1, the surface treatment of CNT
A oxidative purification: the dense HNO that 2～10 mass parts CNTs is put into 250～1250 parts by volume
3In, under 140～150 ℃ of temperature, boil 2～4h, at room temperature soak 24～72h then,
The b sensitization: with the CNT behind the above-mentioned oxidative purification is the SnCl of 0.1M in concentration
2250～1250 parts by volume or concentration are the SnCl of 0.1M
2With concentration be sensitization 60～90min in mixed solution 250～1250 parts by volume of HCl of 0.1M,
The c activation: with the CNT after the above-mentioned sensitization is the PdCl of 0.0024M in concentration
2250～1250 parts by volume or concentration are the PdCl of 0.0024M
2With activate 60～90min in mixed solution 250～1250 parts by volume of the HCl of 0.25M,
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature;
2, the preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process
With the CNT 0.5～5.0wt% after the above-mentioned copper facing, metal dust 99.5～95.0wt% and an amount of dispersant in mortar hand lapping or in ball mill ball milling mix dry for standby in baking oven;
B powder metallurgy forming and sintering
Above-mentioned mixed-powder is inserted in the mould, under the pressure of 0.8～1.0T, be pressed into prefabrication, put into sintering furnace, at NH
3Decompose sintering under the atmosphere, sintering temperature is 760～890 ℃, sintering time 2～3h; Then the bearing behind the sintering is carried out finishing under the pressure of 0.8～1.0T, immersion oil, immersion oil time 15～30min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
Performance test is to test according to " U.S. MPIF standard 35 ", tests its microhardness 350HV～590HV, radial crushing strength 242.5MPa～318.3Mpa, oil content 21.13%～23.42%.
The present invention has following advantage:
1, the microhardness of nano-carbon tube reinforced stephanoporate oil-retaining bearing, radial crushing strength, the oil content stephanoporate oil-retaining bearing that do not add CNT improves greatly, has enlarged the scope of application of oiliness bearing, is specially adapted to the operating mode field of high rotating speed, high-mechanic;
2, the self-lubricating effect of nano-carbon tube reinforced stephanoporate oil-retaining bearing is good, and energy consumption is low, long service life.
The specific embodiment
Below by embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this present embodiment only is used for the present invention is further specified; but can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1
The preparation method that CNT strengthens copper tinbase stephanoporate oil-retaining bearing may further comprise the steps:
(1) processing on CNT surface
A oxidative purification: the 2g CNT is put into the dense HNO of 250ml
3In, under 140 ℃ of temperature, boil 2h, at room temperature soak 24h then.
The b sensitization: is 0.1MSnCl with the CNT behind the above-mentioned oxidative purification in concentration
2250ml solution in sensitization 60min.
The c activation: is 0.0024M PdCl with the CNT after the above-mentioned sensitization in concentration
2250ml solution in activate 60min.
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature.
(2) preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process: with CNT 0.5wt% after the above-mentioned copper facing and Cu-Sn mixed-powder 99.5wt% hand lapping in mortar mix and in baking oven dry for standby, dispersant is an acetone, the mass content of Sn is 10.0wt% in the Cu-Sn mixed-powder;
B powder metallurgy forming and sintering: mixed-powder is inserted in the mould, under the pressure of 0.8T, be pressed into the prefabrication of external diameter * internal diameter * highly=Φ 5.4mm * Φ 2mm * 2.5mm, put into sintering furnace then, at NH
3Decompose sintering under the atmosphere, sintering temperature is 760 ℃, and sintering time 3h carries out finishing with the bearing behind the sintering then under the pressure of 0.8T, immersion oil, and immersion oil time 15min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
Performance Detection: recording its performance according to " U.S. MPIF standard 35 " is that microhardness is 350HV, and radial crushing strength is 242.51MPa, and oil content is 21.44%; Microhardness, radial crushing strength, the oil content that adds the oiliness bearing behind the CNTs be higher than the same metal composition do not add CNTs the time microhardness 231HV, radial crushing strength 212.2MPa, the oil content 20.6% of oiliness bearing.
Embodiment 2
The preparation method that CNT strengthens hole, iron copper Quito oiliness bearing may further comprise the steps:
(1) processing on CNT surface
A oxidative purification: put into the dense HNO of 750ml at the 6g CNT
3In, under 140 ℃ of temperature, boil 3h, at room temperature soak 36h then,
The b sensitization: is 0.1M SnCl with the CNT behind the above-mentioned oxidative purification in concentration
2Solution 750ml in sensitization 90min,
The c activation: is 0.0024M PdCl with the CNT after the above-mentioned sensitization in concentration
2Solution in 750ml activation 90min,
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature.
(2) preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process: with the CNT 1.0wt% after the above-mentioned copper facing and Fe-Cu mixed-powder 99.0wt% in mortar manual mix and in baking oven dry for standby, dispersant is an ethanol, the mass content of Cu is 10.0wt% in the Fe-Cu mixed-powder.
B powder metallurgy forming and sintering: mixed-powder is inserted in the mould, under the pressure of 0.8T, be pressed into the prefabrication of external diameter * internal diameter * highly=Φ 5.4mm * Φ 2mm * 2.5mm, put into sintering furnace then, at NH
3Decompose sintering under the atmosphere, sintering temperature is 850 ℃, and sintering time 3h carries out finishing with the bearing behind the sintering then under the pressure of 1.0T, immersion oil, and immersion oil time 20min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
Performance Detection: recording its performance according to " U.S. MPIF standard 35 " is that microhardness is that 468HV, radial crushing strength are that 303.14MPa, oil content are 21.34%; Microhardness, radial crushing strength, the oil content that adds the oiliness bearing behind the CNTs be higher than the same metal composition do not add CNTs the time microhardness 231HV, radial crushing strength 212.2MPa, the oil content 20.6% of oiliness bearing.
Embodiment 3
The preparation method that CNT strengthens hole, iron copper Quito oiliness bearing may further comprise the steps:
(1) processing on CNT surface:
A oxidative purification: put into the dense HNO of 750ml at the 6g CNT
3In, under 150 ℃ of temperature, boil 3h, at room temperature soak 36h then.
The b sensitization: is 0.1M SnCl with the CNT behind the above-mentioned oxidative purification in concentration
2Sensitization 60min among the mixed solution 750ml of+0.1M HCl.
The c activation: is at 0.0024M PdCl with the CNT after the above-mentioned sensitization in concentration
2Activate 60min among the mixed solution 750ml of+0.25M HCl.
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature.
(2) preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process: with CNT 1.5wt% after the above-mentioned copper facing and Fe-Cu mixed-powder 98.5wt% ball milling in ball mill mix and in baking oven dry for standby, dispersant is an acetone, the mass content of Cu is 30wt% in the Fe-Cu mixed-powder;
B powder metallurgy forming and sintering: mixed-powder is inserted in the mould, under the pressure of 1.0T, be pressed into the prefabrication of external diameter * internal diameter * highly=Φ 5.4mm * Φ 2mm * 2.5mm, put into sintering furnace then, at NH
3Decompose sintering under the atmosphere, sintering temperature is 830 ℃, and sintering time 3h carries out finishing with the bearing behind the sintering then under the pressure of 1.0T, immersion oil, and immersion oil time 20min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
Performance Detection: recording its performance according to " U.S. MPIF standard 35 " is that microhardness is 429HV, and radial crushing strength is 257.67MPa, and oil content is 23.42%; Microhardness, radial crushing strength, the oil content that adds the oiliness bearing behind the CNTs be higher than the same metal composition do not add CNTs the time oiliness bearing microhardness 350HV, radial crushing strength 230MPa, oil content 19.5%.
Embodiment 4
The preparation method that CNT strengthens copper clad iron-based stephanoporate oil-retaining bearing may further comprise the steps:
(1) processing on CNT surface:
A oxidative purification: put into the dense HNO of 1250ml at the 8g CNT
3In, under 150 ℃ of temperature, boil 4h, at room temperature soak 72h then.
The b sensitization: is 0.1M SnCl with the CNT behind the above-mentioned oxidative purification in concentration
2Sensitization 90min among the mixed solution 1250ml of+0.1M HCl.
The c activation: is 0.0024M PdCl with the CNT after the above-mentioned sensitization in concentration
2Activate 90min among the mixed solution 1250ml of+0.25M HCl.
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature.
(2) preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process: powder 95.0wt% ball milling in ball mill of CNT 5.0wt% after the above-mentioned copper facing and copper clad iron mixed and in baking oven dry for standby, dispersant is an ethanol, the mass content of Cu is 20.0wt% in the copper clad iron powder;
B powder metallurgy forming and sintering: mixed-powder is inserted in the mould, under the pressure of 1.0T, be pressed into the prefabrication of external diameter * internal diameter * highly=Φ 5.4mm * Φ 2mm * 2.5mm, put into sintering furnace then, at NH
3Decompose sintering under the atmosphere, sintering temperature is 890 ℃, and sintering time 2h carries out finishing with the bearing behind the sintering then under the pressure of 1.0T, immersion oil, and immersion oil time 30min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
Performance Detection: recording its performance according to " U.S. MPIF standard 35 " is that microhardness is 590HV, and radial crushing strength is 318.30MPa, and oil content is 21.13%; Microhardness, radial crushing strength, the oil content that adds the oiliness bearing behind the CNTs be higher than the same metal composition do not add CNTs the time oiliness bearing microhardness 350HV, radial crushing strength 230MPa, oil content 19.5%.
Claims (5)
1. the preparation method of a nano-carbon tube reinforced stephanoporate oil-retaining bearing, it is characterized in that: this method may further comprise the steps:
(1) processing on CNT surface:
A oxidative purification: the dense HNO that 2～10 mass parts CNTs is put into 250～1250 parts by volume
3In, under 140～150 ℃ of temperature, boil 2～4h, at room temperature soak 24～72h then,
The b sensitization: with the CNT behind the above-mentioned oxidative purification is the SnCl of 0.1M in concentration
2250～1250 parts by volume or concentration are the SnCl of 0.1M
2With concentration be sensitization 60～90min in mixed solution 250～1250 parts by volume of HCl of 0.1M,
The c activation: with the CNT after the above-mentioned sensitization is the PdCl of 0.0024M in concentration
2250～1250 parts by volume or concentration are the PdCl of 0.0024M
2With activate 60～90min in mixed solution 250～1250 parts by volume of the HCl of 0.25M,
D copper coating: the CNT after the above-mentioned activation is put into the plating bath for preparing, in 70 ℃ of following copper facing of temperature;
(2) preparation of nano-carbon tube reinforced stephanoporate oil-retaining bearing
A mixing powder process: with the CNT 0.5～5.0wt% after the above-mentioned copper facing, metal dust 99.5～95.0wt% and an amount of dispersant in mortar hand lapping or in ball mill ball milling mix dry for standby in baking oven;
B powder metallurgy forming and sintering: above-mentioned mixed-powder is inserted in the mould, under the pressure of 0.8～1.0T, be pressed into prefabrication, put into sintering furnace, at NH
3Decompose sintering under the atmosphere, sintering temperature is 760～890 ℃, sintering time 2～3h; Then the bearing behind the sintering is carried out finishing under the pressure of 0.8～1.0T, immersion oil, immersion oil time 15～30min obtains nano-carbon tube reinforced stephanoporate oil-retaining bearing.
2. the preparation method of nano-carbon tube reinforced stephanoporate oil-retaining bearing according to claim 1, it is characterized in that the raw metal powder is copper tin mixed powder or iron copper mixed powder or copper clad iron powder, the content of Sn powder is that the content of Cu powder in 5.0～20.0wt%, the sintropae is that the content of Cu powder in 10.0～30.0wt% and the copper clad iron powder is 10.0～30.0wt% in the copper tin mixed-powder.
3. the preparation method of nano-carbon tube reinforced stephanoporate oil-retaining bearing as claimed in claim 1 or 2 is characterized in that dispersant is ethanol or acetone.
4. the nano-carbon tube reinforced stephanoporate oil-retaining bearing for preparing of method according to claim 1.
5. the operating mode field that is used for high rotating speed, high-mechanic as nano-carbon tube reinforced stephanoporate oil-retaining bearing as described in the claim 4.
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| CN102266906A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102788090A (en) * | 2012-08-27 | 2012-11-21 | 四川省宏锦泰粉末冶金有限公司 | Thin-wall long-barrel-shaped bearing containing oil and production method thereof |
| GB2509173A (en) * | 2012-12-24 | 2014-06-25 | Mahle Int Gmbh | A sliding bearing |
| EP2765319A1 (en) * | 2013-02-08 | 2014-08-13 | KS Gleitlager GmbH | Friction bearing compound material and friction bearing element made of the same |
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| CN105090246A (en) * | 2015-08-04 | 2015-11-25 | 华中科技大学 | Infiltration mold for manufacturing oil bearing and manufacturing method for oil bearing |
| CN105458292A (en) * | 2015-12-10 | 2016-04-06 | 北京理工大学 | Preparation method of carbon nano tube/copper powder |
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| CN110552962A (en) * | 2019-09-06 | 2019-12-10 | 敖琼瑶 | Fascia gun metal bearing and preparation method thereof |
| CN110983151A (en) * | 2019-12-10 | 2020-04-10 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN113357267A (en) * | 2020-03-04 | 2021-09-07 | 马勒国际有限公司 | Sliding bearing, method for producing sliding bearing, internal combustion engine having sliding bearing, and electric machine having sliding bearing |
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| CN102266906A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102266906B (en) * | 2010-06-02 | 2013-06-26 | 中国科学院金属研究所 | Preparation method of easy-to-remove ceramic mold core |
| CN102788090A (en) * | 2012-08-27 | 2012-11-21 | 四川省宏锦泰粉末冶金有限公司 | Thin-wall long-barrel-shaped bearing containing oil and production method thereof |
| US10473160B2 (en) | 2012-12-24 | 2019-11-12 | Mahle International Gmbh | Sliding bearing with lining layer comprising carbon nanostructures |
| GB2509173A (en) * | 2012-12-24 | 2014-06-25 | Mahle Int Gmbh | A sliding bearing |
| CN104884828A (en) * | 2012-12-24 | 2015-09-02 | 马勒国际有限公司 | Sliding bearing with lining layer comprising carbon nanostructures |
| WO2014102529A1 (en) * | 2012-12-24 | 2014-07-03 | Mahle International Gmbh | Sliding bearing with lining layer comprising carbon nanostructures |
| EP2765319A1 (en) * | 2013-02-08 | 2014-08-13 | KS Gleitlager GmbH | Friction bearing compound material and friction bearing element made of the same |
| CN104439250A (en) * | 2014-12-31 | 2015-03-25 | 扬州立德粉末冶金股份有限公司 | Method for manufacturing dispersion strengthening copper-based oil bearing |
| CN105090246A (en) * | 2015-08-04 | 2015-11-25 | 华中科技大学 | Infiltration mold for manufacturing oil bearing and manufacturing method for oil bearing |
| CN105458292A (en) * | 2015-12-10 | 2016-04-06 | 北京理工大学 | Preparation method of carbon nano tube/copper powder |
| CN108716460A (en) * | 2018-05-16 | 2018-10-30 | 湖北理工学院 | A kind of hole processing method of freezer compressor powder metallurgy connecting rod |
| CN110257739A (en) * | 2019-06-21 | 2019-09-20 | 山东金麒麟股份有限公司 | A kind of preparation method of Environment protection type friction material and brake lining and brake lining |
| CN110552962A (en) * | 2019-09-06 | 2019-12-10 | 敖琼瑶 | Fascia gun metal bearing and preparation method thereof |
| CN110983151A (en) * | 2019-12-10 | 2020-04-10 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN110983151B (en) * | 2019-12-10 | 2021-09-21 | 华南理工大学 | High-iron copper-based oil-retaining bearing material containing nano WC and preparation method thereof |
| CN113357267A (en) * | 2020-03-04 | 2021-09-07 | 马勒国际有限公司 | Sliding bearing, method for producing sliding bearing, internal combustion engine having sliding bearing, and electric machine having sliding bearing |
| CN113881867A (en) * | 2021-10-13 | 2022-01-04 | 佛山市南海宝碳石墨制品有限公司 | Rapid preparation method of high-thermal-conductivity carbon copper |
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