CN105562713A - Preparing method for copper coated iron composite powder - Google Patents
Preparing method for copper coated iron composite powder Download PDFInfo
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- CN105562713A CN105562713A CN201610063172.2A CN201610063172A CN105562713A CN 105562713 A CN105562713 A CN 105562713A CN 201610063172 A CN201610063172 A CN 201610063172A CN 105562713 A CN105562713 A CN 105562713A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
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- Chemical Kinetics & Catalysis (AREA)
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- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
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Abstract
The invention relates to a preparing method for copper coated iron composite powder and belongs to the technical field of composite powder. The preparing method includes the steps that firstly, copper sulfate is dissolved in water, and then ammonium hydroxide is added to the water to obtain a copper ammonia solution; secondly, rust and hydrogen are reacted at a high temperature to prepare iron powder; thirdly, the iron powder is washed through deionized water and then reacts with the deionized water and polyacrylate under certain conditions, filtering is conducted, filtered matter is dried, smashed and sieved, and powder is obtained; fourthly, the powder is heated and taken out when being hot and is mixed with a copper ammonia protection solution, then sodium citrate is added, and the obtained solution is put into ultrasound to be dispersed; and fifthly, acetaldehyde is added, the obtained solution is stirred till the solution is uniform and is then put into ultrasound to be dispersed, pumping filtration is conducted on the solution, obtained filtered matter is put under infrared rays to be irradiated, and ball grinding and sieving are conducted. According to the copper coated iron composite powder prepared through the method, iron is evenly coated by copper, the content of copper in the copper coated iron exceeds 20%, the coating rate reaches more than 99%, the bulging and disengaging phenomena of a copper film are avoided, and meanwhile the copper coated iron composite powder is placed in a sealed manner for 6-10 months and is protected against oxidizing discoloration.
Description
Technical field
The present invention relates to a kind of preparation method of copper-coated iron composite powder, belong to composite powder technical field.
Background technology
Copper-coated iron composite powder is the ideal material of the oiliness bearing of Development and Production in recent years, and it is based on iron powder, at the coated one deck copper film of its particle surface, forms the copper iron-based composite powder that a kind of appearance color is the same with copper powder.The oiliness bearing produced with copper-coated iron composite powder, compared with the oiliness bearing made of bronze powder, not only meet environmental requirement, and price is much lower, is obtained extensive use and the popularization of users.Be widely used in the Binder Phase material made powder in metallurgical oiliness bearing, friction material and diamond tool.
What the production method of existing copper iron mixed powder adopted is mixing diffusion method, it is that copper powder and reduced iron powder are mixed according to a certain percentage, then certain temperature is heated to, copper powder is melted and is coated on ferrous powder granules surface, due to the method be a kind of in the mode of physics the surface of copper clad at ferrous powder granules, therefore, it also exists following deficiency: because the bulk density between copper powder and iron powder is different, easily segregation is there is during mixing, segregation has just caused regional center copper more, some places copper is few, even without copper, the place that copper is many, during copper clad ferrous powder granules, copper film is blocked up, the place that copper is few, during copper clad ferrous powder granules, not exclusively coated, even completely not coated.In a word, be that copper clad iron powder is uneven.Simultaneously owing to being brought into physical contact between copper and iron, easily that gas is wherein coated, cause contact tightness degree to reduce, cause copper film bubbling and come off.
Summary of the invention
Technical problem to be solved by this invention: for utilizing copper powder and iron powder at present by the copper-clad iron compound that mixes diffusion method and prepare because the physical propertys such as the density between copper powder and iron powder there are differences; cause copper clad iron powder uneven or its tightness degree is reduced; the problem causing copper film bubbling or come off; providing a kind of cuprammonium that utilizes protects solution to mix with the iron powder that iron rust reduces; and dispersant and complexing agent auxiliary under, prepare copper-coated iron composite powder by twice ultrasonic disperse.In copper-coated iron composite powder prepared by the present invention, copper clad iron is even, the phenomenon that there will not be copper film bubbling simultaneously He come off.
For solving the problems of the technologies described above, the present invention adopts technical scheme as described below to be:
(1) get 70 ~ 80g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, adding mixed liquor quality 25 ~ 30% mass fraction to it is again the ammoniacal liquor of 25%, 10 ~ 15min is stirred to it, obtains cuprammonium protection solution, for subsequent use;
(2) get 100 ~ 150g iron rust, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 200 ~ 300 DEG C with the speed of 3 DEG C/min, reaction 40 ~ 45min, after insulation 1 ~ 2h, reactant is taken out, leaves standstill and be cooled to room temperature, obtain iron powder;
(3) after leaving standstill and being cooled to room temperature, by deionized water to its washing 2 ~ 3 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 20 ~ 30% and the polyacrylate of iron powder quality 2 ~ 3% to it, reaction temperature is 70 ~ 80 DEG C, after reaction 20 ~ 30min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 120 ~ 150 order powder;
(4) powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 40 ~ 45 DEG C, after heating 20 ~ 25min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium prepared by step (1), then add the natrium citricum of cuprammonium protection solution quality 1 ~ 2%, it is stirred until after mixing, is placed in ultrasonic dispersion 1 ~ 2min;
(5) after dispersion completes, the acetaldehyde of mixture quality 2 ~ 3% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 7 ~ 10min of 200 ~ 300W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 21 ~ 25 μm after irradiation 8 ~ 9min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.
Application process of the present invention: copper-coated iron composite powder the present invention prepared is widely used in electronic product, to make in the product such as automobile and precision instrument on high-revolving oiliness bearing, the phenomenon in use not occurring copper film bubbling and come off, improves 10 ~ 15% service life simultaneously.
The present invention is compared with additive method, and Advantageous Effects is:
(1) in the copper-coated iron composite powder prepared of the present invention, copper clad iron is even, and wherein copper content is more than 20%, and clad ratio reaches more than 99%;
(2) phenomenon that the copper-coated iron composite powder that prepared by the present invention does not occur copper film bubbling and comes off, sealing simultaneously prevents for 6 ~ October, not oxidation stain;
(3) preparation process is simple, and required cost is low.
Detailed description of the invention
First get 70 ~ 80g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, adding mixed liquor quality 25 ~ 30% mass fraction to it is again the ammoniacal liquor of 25%, 10 ~ 15min is stirred to it, obtains cuprammonium protection solution, for subsequent use; Get 100 ~ 150g iron rust again, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 200 ~ 300 DEG C with the speed of 3 DEG C/min, reaction 40 ~ 45min, after insulation 1 ~ 2h, reactant is taken out, leaves standstill and be cooled to room temperature, obtain iron powder; After leaving standstill and being cooled to room temperature, by deionized water to its washing 2 ~ 3 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 20 ~ 30% and the polyacrylate of iron powder quality 2 ~ 3% to it, reaction temperature is 70 ~ 80 DEG C, after reaction 20 ~ 30min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 120 ~ 150 order powder;
The powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 40 ~ 45 DEG C, after heating 20 ~ 25min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium prepared by step (1), then add the natrium citricum of cuprammonium protection solution quality 1 ~ 2%, it is stirred until after mixing, is placed in ultrasonic dispersion 1 ~ 2min; After dispersion completes, the acetaldehyde of mixture quality 2 ~ 3% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 7 ~ 10min of 200 ~ 300W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 21 ~ 25 μm after radiation 8 ~ 9min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.
Example 1
First get 80g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, then to add mixed liquor quality 30% mass fraction to it be the ammoniacal liquor of 25%, 15min is stirred to it, obtains cuprammonium protection solution, for subsequent use; Get 150g iron rust again, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 300 DEG C with the speed of 3 DEG C/min, reaction 45min, after insulation 2h, reactant is taken out, leave standstill and be cooled to room temperature, obtain iron powder; After leaving standstill and being cooled to room temperature, by deionized water to its washing 3 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 230% and the polyacrylate of iron powder quality 3% to it, reaction temperature is 80 DEG C, after reaction 30min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 150 order powder; The powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 45 DEG C, after heating 25min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium, then add the natrium citricum of cuprammonium protection solution quality 2%, it is stirred until after mixing, is placed in ultrasonic dispersion 2min; After dispersion completes, the acetaldehyde of mixture quality 3% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 10min of 300W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 25 μm after radiation 9min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.Copper-coated iron composite powder the present invention prepared is widely used in electronic product on high-revolving oiliness bearing, the phenomenon in use not occurring copper film bubbling He come off, and improves 15% service life simultaneously.
Example 2
First get 70g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, then to add mixed liquor quality 25% mass fraction to it be the ammoniacal liquor of 25%, 10min is stirred to it, obtains cuprammonium protection solution, for subsequent use; Get 100g iron rust again, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 200 DEG C with the speed of 3 DEG C/min, reaction 40min, after insulation 1h, reactant is taken out, leave standstill and be cooled to room temperature, obtain iron powder; After leaving standstill and being cooled to room temperature, by deionized water to its washing 2 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 20% and the polyacrylate of iron powder quality 2 ~ 3% to it, reaction temperature is 70 DEG C, after reaction 20min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 120 order powder; The powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 40 DEG C, after heating 20min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium, then add the natrium citricum of cuprammonium protection solution quality 1%, it is stirred until after mixing, is placed in ultrasonic dispersion 1min; After dispersion completes, the acetaldehyde of mixture quality 2% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 7min of 200W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 21 μm after radiation 8min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.Copper-coated iron composite powder the present invention prepared is widely used in the products such as precision instrument on high-revolving oiliness bearing, the phenomenon in use not occurring copper film bubbling He come off, and improves 10% service life simultaneously.
Example 3
First get 75g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, then to add mixed liquor quality 27% mass fraction to it be the ammoniacal liquor of 25%, 12min is stirred to it, obtains cuprammonium protection solution, for subsequent use; Get 120g iron rust again, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 250 DEG C with the speed of 3 DEG C/min, reaction 42min, after insulation 1h, reactant is taken out, leave standstill and be cooled to room temperature, obtain iron powder; After leaving standstill and being cooled to room temperature, by deionized water to its washing 2 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 20 ~ 30% and the polyacrylate of iron powder quality 2% to it, reaction temperature is 75 DEG C, after reaction 25min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 125 order powder; The powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 42 DEG C, after heating 22min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium, then add the natrium citricum of cuprammonium protection solution quality 1%, it is stirred until after mixing, is placed in ultrasonic dispersion 1min; After dispersion completes, the acetaldehyde of mixture quality 2% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 8min of 250W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 22 μm after radiation 8min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.Copper-coated iron composite powder the present invention prepared is widely used in making in automobile product on high-revolving oiliness bearing, and the phenomenon in use not occurring copper film bubbling He come off improves 12% service life simultaneously.
Claims (1)
1. a preparation method for copper-coated iron composite powder, is characterized in that concrete preparation process is:
(1) get 70 ~ 80g copper sulphate and be placed in beaker, and add deionized water to it, stir until after copper sulphate is completely dissolved, adding mixed liquor quality 25 ~ 30% mass fraction to it is again the ammoniacal liquor of 25%, 10 ~ 15min is stirred to it, obtains cuprammonium protection solution, for subsequent use;
(2) get 100 ~ 150g iron rust, be placed in Muffle furnace, and pass into hydrogen to it, in eliminating reactor after air, carry out being heated to 200 ~ 300 DEG C with the speed of 3 DEG C/min, reaction 40 ~ 45min, after insulation 1 ~ 2h, reactant is taken out, leaves standstill and be cooled to room temperature, obtain iron powder;
(3) after leaving standstill and being cooled to room temperature, by deionized water to its washing 2 ~ 3 times, and be placed in the reactor of band turbine type stirring, and adding the deionized water of iron powder quality 20 ~ 30% and the polyacrylate of iron powder quality 2 ~ 3% to it, reaction temperature is 70 ~ 80 DEG C, after reaction 20 ~ 30min, after making it be cooled to room temperature, it is filtered, and filtrate is dried, be placed in pulverizer pulverize and sieve, obtain 120 ~ 150 order powder;
(4) powder of above-mentioned preparation is placed in beaker, and to its heating, controlling its temperature is 40 ~ 45 DEG C, after heating 20 ~ 25min, it is taken out while hot, and after protecting solution to be uniformly mixed by solid-to-liquid ratio 30:1 with cuprammonium prepared by step (1), then add the natrium citricum of cuprammonium protection solution quality 1 ~ 2%, it is stirred until after mixing, is placed in ultrasonic dispersion 1 ~ 2min;
(5) after dispersion completes, the acetaldehyde of mixture quality 2 ~ 3% is added in said mixture, it is stirred until evenly, and after being placed in the ultrasonic dispersion 7 ~ 10min of 200 ~ 300W, suction filtration is carried out to it, gained screening being placed in wavelength is under the infrared ray of 21 ~ 25 μm after irradiation 8 ~ 9min, is placed in ball mill ball milling and crosses 180 mesh sieves, can be prepared into copper-coated iron composite powder.
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Cited By (5)
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|---|---|---|---|---|
| CN106077623A (en) * | 2016-07-19 | 2016-11-09 | 仇颖莹 | A kind of preparation method being evenly coated copper-coated iron composite powder |
| CN106238727A (en) * | 2016-08-23 | 2016-12-21 | 合肥工业大学 | A kind of preparation method of Cu bag W composite granule |
| CN108311692A (en) * | 2018-05-03 | 2018-07-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method at anti-oxidant copper-coated iron composite powder end |
| CN109852134A (en) * | 2019-01-12 | 2019-06-07 | 蒋文明 | A kind of preparation method of aqueous metal ink |
| CN112908603A (en) * | 2021-01-21 | 2021-06-04 | 广东省科学院材料与加工研究所 | Iron-based amorphous magnetic powder core and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077623A (en) * | 2016-07-19 | 2016-11-09 | 仇颖莹 | A kind of preparation method being evenly coated copper-coated iron composite powder |
| CN106238727A (en) * | 2016-08-23 | 2016-12-21 | 合肥工业大学 | A kind of preparation method of Cu bag W composite granule |
| CN108311692A (en) * | 2018-05-03 | 2018-07-24 | 佛山九陌科技信息咨询有限公司 | A kind of preparation method at anti-oxidant copper-coated iron composite powder end |
| CN109852134A (en) * | 2019-01-12 | 2019-06-07 | 蒋文明 | A kind of preparation method of aqueous metal ink |
| CN112908603A (en) * | 2021-01-21 | 2021-06-04 | 广东省科学院材料与加工研究所 | Iron-based amorphous magnetic powder core and preparation method thereof |
| CN112908603B (en) * | 2021-01-21 | 2023-09-26 | 广东省科学院材料与加工研究所 | Iron-based amorphous magnetic powder core and preparation method thereof |
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