CN102534294A - Preparation method of low-apparent-density copper tin alloy powder for micro oil-retaining bearing - Google Patents
Preparation method of low-apparent-density copper tin alloy powder for micro oil-retaining bearing Download PDFInfo
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Abstract
The invention discloses a preparation method of low-apparent-density copper tin alloy powder for a micro oil-retaining bearing, and belongs to the technical field of copper tin alloy powder for the micro oil-retaining bearing. The alloy powder comprises the following component phases in percentage by weight: 65-95 percent of Cu and 5-35 percent of Sn. The preparation method comprises the following steps of: after atomized pulverizing of the copper tin alloy, dynamically oxidizing the prepared alloy powder; and then obtaining the alloy powder with proper apparent density by using a high-temperature hydrogen reduction technology. The method has a simple flow, low equipment investment and high technical content; the copper tin alloy powder is not mechanically mixed so as to easily cause the phenomenon of segregation during use and storage; meanwhile, the specific surface area of the powder is increased; and the press sintering performance of the powder is improved. The prepared alloy powder is particularly suitable for producing the micro oil-retaining bearing.
Description
Technical field
The invention belongs to miniature oil bearing with gunmetal powder preparing technical field, particularly a kind of miniature oil bearing is with the preparation method of low pine than gunmetal powder.
Background technology
The miniature oil bearing of copper tin has advantages such as corrosion resistance is strong, physical strength is high, thermal conductivity is high, long working life; Be widely used in having become one type of requisite fundamental parts in the mechanical industry at present in the fields such as precise electronic, high-grade household electrical appliance, communications service, automobile and IT.Because the raw copper tin powder is very big to the final performance impact of miniature oil bearing, therefore to the research of raw material powder with how to improve the attention that powder property receives people always.
During directly with copper powder and glass putty mixing manufacturing sintered metal bearing, various raw material powder will mix, and obtain very difficulty of uniform mixed powder.In addition, the vibration in transportation and can cause that from powder powder bucket automatic powder loading to the vibration the mold process original powder produces spot segregation in the powder mix causes sintered article interalloy element skewness.
Two kinds of elements of copper tin in the atomizing gunmetal powder are evenly distributed, segregation-free, and spherical but mostly powder is, loose density is high, thereby causes powder forming property poor, and compact strength is low, is difficult to be used for making miniature oil bearing sintered article.
The raw materials used powder of domestic and international miniature oil bearing manufacturer is generally partially-alloyed copper tin powder at present, and this powder has successfully solved the problem that above two kinds of powder exist, but complex manufacturing technology, and the powder cost is higher.The said powder production technical process of this patent is simple, the equipment input is little, with high content of technology, has reduced the cost of miniature oil bearing with powder stock, is a kind of high-performance, comparatively ideal powder stock.
Summary of the invention
A kind of miniature oil bearing is with the preparation method of low pine than gunmetal powder, and the weight percent of this gunmetal meal component phase is: Cu:65～95%, and Sn:5～35%, this method steps is following:
(1) powder by atomization technology: the weight percent according to gunmetal meal component phase mixes the electrolysis copper coin with the tin material, be heated to molten state after, adopt water atomization technology to process alloy powder particle;
(2) oxide powder technology: powdered alloy is carried out dynamic oxidation in rotary kiln;
(3) the powder reducing process reduces the powder particle after the oxidation in reduction furnace;
(4) powder particle after will reducing sieves, and closes base, processes to meet low pine that miniature oil bearing uses than gunmetal powder.
Further, the present invention has provided preferred mutually weight percent: the Cu:90 of gunmetal meal component～95%, Sn:5～10%.
Further, the present invention has provided in the aforesaid method step (2), and oxidizing temperature is 300～500 ℃, and oxidization time is 45～90min.
Further, the present invention has provided in the aforesaid method step (3), and the protective atmosphere that reduction is adopted is ammonia dissolving atmosphere (N
2: H
2=1: 3); Reduction temperature is 400～600 ℃, and the recovery time is 45～90min.
The loose density of gained gunmetal powder is 2.0～3.2g/cm
3
Beneficial effect: gunmetal carries out dynamic oxidation to the powdered alloy that makes behind powder by atomization, adopts the high-temperature hydrogen reduction technology to obtain pine than the alloy powder that is fit to then.Through oxidation, reduction operation, further increase the specific surface area of powder, reduce the loose density of powder.Through the gunmetal powder that present method is made, its loose density is controlled, and the loose density scope is 2.0～3.2g/cm
3
The present invention reduces loose density through the gunmetal powder directly being carried out oxidative deamination process, has started a kind of new way for preparing low pine than gunmetal powder.This method flow is simple, the equipment input is little, with high content of technology, environmentally safe, and the powder property of preparing is excellent; Cost is low; Economic benefit is obvious, and in use and storage process, the gunmetal powder the segregation phenomena that mechanical mixed powder is prone to can not take place; Increase the specific surface area of powder simultaneously, improved the compacting sintering performance of powder.Gunmetal powder of the present invention is particularly suitable for the raw material as miniature oil bearing.
Description of drawings
Fig. 1 is the ESEM picture of the gunmetal powder of embodiment 1 preparation.
Embodiment
Below through embodiment the present invention is further described:
Embodiment 1
A kind of miniature oil bearing is with the preparation method of low pine than gunmetal powder, and the weight percent of this gunmetal meal component phase is: Cu:90%, and Sn:10%, this method steps is following:
(1) powder by atomization technology: with the electrolysis copper coin with after the tin material mixes according to 9: 1 weight ratio, be heated to molten state after, make the gunmetal powder particle through the water atomization powder manufacturing apparatus;
(2) oxide powder technology: powdered alloy is carried out dynamic oxidation in rotary kiln under 450 ℃ of conditions, oxidization time is 60min;
(3) powder reducing process: the gunmetal powder after the oxidation is reduced in the chain type reduction furnace, and the protective atmosphere that reduction is adopted is ammonia dissolving atmosphere (N
2: H
2=1: 3), reduction temperature is 550 ℃, and the recovery time is 45min;
(4) powder particle after will reducing sieves, and closes base, processes to meet low pine that miniature oil bearing uses than gunmetal powder.Its surface topography is as shown in Figure 1.
The copper tin powder particle appearance that makes is khaki color, and particle shape is irregular spongy.
As can beappreciated from fig. 1, adopt the powder surface of this prepared coarse, specific surface area is big, is spongy, helps the compacting of powder later stage, sintering.
Increase the roughness of powder surface through oxidation, reducing process.The loose density of present embodiment gained gunmetal powder is 2.4g/cm
3About.
Embodiment 2
Except the weight percent of gunmetal meal component phase is: Cu:65%, Sn:35%, the electrolysis copper coin is with outside the tin material mixes according to 65: 35 weight ratio, and all the other are identical with embodiment 1, and the loose density of present embodiment gained gunmetal powder is 2.8g/cm
3About.
Embodiment 3
Except the weight percent of this gunmetal meal component phase is: Cu:95%, Sn:5%, the electrolysis copper coin is with outside the tin material mixes according to 95: 5 weight ratio, and all the other are identical with embodiment 1, and the loose density of present embodiment gained gunmetal powder is 2.2g/cm
3About.
Embodiment 4
In step (2), oxidizing temperature is 300 ℃, and the time is 90min, and in the step (3), reduction temperature is 400 ℃, and the recovery time is outside the 90min, and all the other are identical with embodiment 1, and the loose density of present embodiment gained gunmetal powder is 2.8g/cm
3About.
Embodiment 5
In step (2), oxidizing temperature is 500 ℃, and the time is 45min, and in the step (3), reduction temperature is 600 ℃, and the recovery time is outside the 60min, and all the other are identical with embodiment 1, and the loose density of present embodiment gained gunmetal powder is 2.2g/cm
3About.
Claims (8)
1. a miniature oil bearing is characterized in that with the preparation method of low pine than gunmetal powder the weight percent of this gunmetal meal component phase is: Cu:65～95%, and Sn:5～35%, this method steps is following:
(1) powder by atomization technology: the weight percent according to gunmetal meal component phase mixes the electrolysis copper coin with the tin material, be heated to molten state after, adopt water atomization technology to process alloy powder particle;
(2) oxide powder technology: powdered alloy is carried out dynamic oxidation in rotary kiln;
(3) powder reducing process: in reduction furnace, the powder particle after the oxidation is reduced;
(4) powder particle after will reducing sieves, and closes base, processes to meet low pine that miniature oil bearing uses than gunmetal powder.
2. preparation method according to claim 1 is characterized in that, the weight percent of gunmetal meal component phase: Cu:90～95%, Sn:5～10%.
3. preparation method according to claim 1 is characterized in that, in the step (2), oxidizing temperature is 300～500 ℃.
4. preparation method according to claim 1 is characterized in that, in the step (2), oxidization time is 45～90min.
5. preparation method according to claim 1 is characterized in that, in the step (3), the protective atmosphere that reduction is adopted is an ammonia dissolving atmosphere.
6. preparation method according to claim 1 is characterized in that, in the step (3), reduction temperature is 400～600 ℃.
7. preparation method according to claim 1 is characterized in that, in the step (2), the recovery time is 45～90min.
8. preparation method according to claim 1 is characterized in that, the loose density of gained gunmetal powder is 2.0～3.2g/cm
3
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| CN2010105927928A CN102534294A (en) | 2010-12-08 | 2010-12-08 | Preparation method of low-apparent-density copper tin alloy powder for micro oil-retaining bearing |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888527A (en) * | 2012-10-30 | 2013-01-23 | 海门市海菱碳业有限公司 | Preparation process of copper-tin alloy |
| CN102943507A (en) * | 2012-11-29 | 2013-02-27 | 南充市大禹水务科技有限责任公司 | Rural tower-free aseptic hygienic automatic water supply device |
| CN104493155A (en) * | 2014-12-12 | 2015-04-08 | 铜陵国传电子材料科技有限公司 | Manufacturing method of CuSn10 alloy bronze powder |
| CN105458275A (en) * | 2015-12-10 | 2016-04-06 | 湖南省天心博力科技有限公司 | Preparing method of copper-tin 10 alloy powder for powder metallurgy |
| CN106623953A (en) * | 2016-12-28 | 2017-05-10 | 东莞市精研粉体科技有限公司 | Preparing method of low-reflectivity spherical copper powder for 3D printing |
| CN107130136A (en) * | 2016-02-29 | 2017-09-05 | 金华市程凯合金材料有限公司 | A kind of water atomization manufacture method of copper alloy powder |
| CN107130135A (en) * | 2016-02-29 | 2017-09-05 | 金华市程凯合金材料有限公司 | A kind of water atomization manufacture method of the super performance copper alloy powder of argentiferous |
| CN109128140A (en) * | 2018-09-25 | 2019-01-04 | 罗源县凤山镇企业服务中心 | A kind of preparation method of copper-tin alloy oiliness bearing |
| CN109351959A (en) * | 2018-09-25 | 2019-02-19 | 罗源县凤山镇企业服务中心 | A kind of half spreads the preparation method of copper-tin alloy powder |
| CN109382509A (en) * | 2018-09-25 | 2019-02-26 | 罗源县凤山镇企业服务中心 | A kind of preparation method of the copper-tin localized alloying powder for oiliness bearing |
| CN109967756A (en) * | 2019-03-25 | 2019-07-05 | 安徽鑫佳铜业有限公司 | A kind of low bulk tin bronze powder and its manufacturing method |
| CN109967753A (en) * | 2019-03-04 | 2019-07-05 | 江苏萌达新材料科技有限公司 | A kind of production method of 33 alloy powder of copper and tin for glass grinding tool |
| CN110394456A (en) * | 2019-07-04 | 2019-11-01 | 铜陵鑫佳粉体新材料科技有限公司 | A kind of preparation method of oiliness bearing high-performance CuSn10 powder |
| CN111331129A (en) * | 2020-04-26 | 2020-06-26 | 杭州屹通新材料股份有限公司 | Preparation method of CuSn10 powder with low apparent density |
| CN113579237A (en) * | 2021-07-15 | 2021-11-02 | 江苏萌达新材料科技有限公司 | Preparation method for reducing apparent density of copper-tin alloy powder |
| CN115233026A (en) * | 2022-05-30 | 2022-10-25 | 广东华诺勤耕材料科技有限公司 | Preparation method of copper-tin alloy |
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| JPS5145663A (en) * | 1974-10-18 | 1976-04-19 | Nippon Atomaizu Kako Kk | |
| CN101880790A (en) * | 2009-05-06 | 2010-11-10 | 上海乔敦金属有限公司 | Copper-tin localized alloying powder for oil-retaining bearing and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5145663A (en) * | 1974-10-18 | 1976-04-19 | Nippon Atomaizu Kako Kk | |
| CN101880790A (en) * | 2009-05-06 | 2010-11-10 | 上海乔敦金属有限公司 | Copper-tin localized alloying powder for oil-retaining bearing and preparation method thereof |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888527A (en) * | 2012-10-30 | 2013-01-23 | 海门市海菱碳业有限公司 | Preparation process of copper-tin alloy |
| CN102943507A (en) * | 2012-11-29 | 2013-02-27 | 南充市大禹水务科技有限责任公司 | Rural tower-free aseptic hygienic automatic water supply device |
| CN102943507B (en) * | 2012-11-29 | 2014-02-12 | 南充市大禹水务科技有限责任公司 | Rural tower-free aseptic hygienic automatic water supply device |
| CN104493155A (en) * | 2014-12-12 | 2015-04-08 | 铜陵国传电子材料科技有限公司 | Manufacturing method of CuSn10 alloy bronze powder |
| CN105458275A (en) * | 2015-12-10 | 2016-04-06 | 湖南省天心博力科技有限公司 | Preparing method of copper-tin 10 alloy powder for powder metallurgy |
| CN107130136A (en) * | 2016-02-29 | 2017-09-05 | 金华市程凯合金材料有限公司 | A kind of water atomization manufacture method of copper alloy powder |
| CN107130135A (en) * | 2016-02-29 | 2017-09-05 | 金华市程凯合金材料有限公司 | A kind of water atomization manufacture method of the super performance copper alloy powder of argentiferous |
| CN106623953A (en) * | 2016-12-28 | 2017-05-10 | 东莞市精研粉体科技有限公司 | Preparing method of low-reflectivity spherical copper powder for 3D printing |
| CN109128140A (en) * | 2018-09-25 | 2019-01-04 | 罗源县凤山镇企业服务中心 | A kind of preparation method of copper-tin alloy oiliness bearing |
| CN109351959A (en) * | 2018-09-25 | 2019-02-19 | 罗源县凤山镇企业服务中心 | A kind of half spreads the preparation method of copper-tin alloy powder |
| CN109382509A (en) * | 2018-09-25 | 2019-02-26 | 罗源县凤山镇企业服务中心 | A kind of preparation method of the copper-tin localized alloying powder for oiliness bearing |
| CN109967753A (en) * | 2019-03-04 | 2019-07-05 | 江苏萌达新材料科技有限公司 | A kind of production method of 33 alloy powder of copper and tin for glass grinding tool |
| CN109967756A (en) * | 2019-03-25 | 2019-07-05 | 安徽鑫佳铜业有限公司 | A kind of low bulk tin bronze powder and its manufacturing method |
| CN110394456A (en) * | 2019-07-04 | 2019-11-01 | 铜陵鑫佳粉体新材料科技有限公司 | A kind of preparation method of oiliness bearing high-performance CuSn10 powder |
| CN110394456B (en) * | 2019-07-04 | 2023-05-26 | 铜陵鑫佳粉体新材料科技有限公司 | Preparation method of high-performance CuSn10 powder for oil-retaining bearing |
| CN111331129A (en) * | 2020-04-26 | 2020-06-26 | 杭州屹通新材料股份有限公司 | Preparation method of CuSn10 powder with low apparent density |
| CN113579237A (en) * | 2021-07-15 | 2021-11-02 | 江苏萌达新材料科技有限公司 | Preparation method for reducing apparent density of copper-tin alloy powder |
| CN115233026A (en) * | 2022-05-30 | 2022-10-25 | 广东华诺勤耕材料科技有限公司 | Preparation method of copper-tin alloy |
| CN115233026B (en) * | 2022-05-30 | 2024-04-12 | 广东华诺勤耕材料科技有限公司 | Preparation method of copper-tin alloy |
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