CN113681008B - Metal part - Google Patents
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- CN113681008B CN113681008B CN202110878498.1A CN202110878498A CN113681008B CN 113681008 B CN113681008 B CN 113681008B CN 202110878498 A CN202110878498 A CN 202110878498A CN 113681008 B CN113681008 B CN 113681008B
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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
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
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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
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The metal part provided by the invention is prepared by mixing, granulating, injection molding, degreasing and sintering metal powder, and aluminum alloy powder with the surface completely wrapped with high polymer materials is adopted as the metal powder, so that a core-shell effect of temperature cannot be generated during sintering, the diffusion effect of the metal materials during high-temperature sintering is good, the compactness of the metal part is high, the metal part can meet the requirements of complex structure and small size, and the metal part has good economic benefit and wide application prospect.
Description
Statement of divisional application
The application is a divisional application of Chinese invention patent application with the application number 201910681239.2, and the name of the patent application is 'metal powder wrapped by a high polymer material, a preparation method and application thereof' submitted in 2019 and 26 days.
Technical Field
The invention relates to the field of mechanical parts, in particular to a metal part with high compactness.
Background
It is known that high activity metals and their alloy materials are easily oxidized in air to form oxide films, and the melting points of the internal metal alloy and the oxide constituting the oxide films are greatly different, for example, copper and copper oxide melting points 1083 ℃ and 1326 ℃ respectively, aluminum and aluminum oxide melting points 667 ℃ and 2054 ℃ respectively, titanium and titanium oxide melting points 1660 ℃ and 1850 ℃ respectively, and magnesium oxide melting points 649 ℃ and 2850 ℃ respectively, core-Shell effects of temperature are easily generated during high temperature sintering, thereby affecting the diffusion effect of the metal materials during high temperature sintering, so that the manufactured metal parts are not compact in structure and poor in mechanical properties.
Disclosure of Invention
The invention aims to provide metal powder coated by a polymer material and a preparation method thereof, wherein the metal powder can be applied to a metal injection molding process, and a metal part made of the metal powder has a compact structure.
In order to achieve the above purpose, the method in the technical scheme adopted by the invention is a preparation method of metal powder wrapped by a polymer material, comprising the following steps:
(1) Mixing metal powder with an oxide film coated on the surface, an deoxidized film solution, a polymer material and a solvent for dissolving the polymer material, wherein the deoxidized film solution and the oxide film are subjected to chemical reaction in the mixing process to chemically remove the oxide film, so as to obtain a mixture, and the mixture at least comprises the metal powder with the oxide film removed or partially removed, the polymer material dissolved by the solvent, and a product obtained after the chemical reaction between the deoxidized film solution and the oxide film;
(2) And drying the metal powder in the mixture, and volatilizing the solvent on the metal powder to obtain the metal powder coated with the polymer material.
Preferably, in the step (1), the mixture is subjected to at least one of grinding, vibration and stirring, so that mutual friction is generated between the metal powders, and the oxide film wrapped on the surfaces of the metal powders is physically removed.
Preferably, in the step (1), the metal powder with the surface coated with the oxide film is at least one of aluminum, aluminum alloy, magnesium alloy, titanium alloy, copper and copper alloy.
Further preferably, the aluminum alloy is an aluminum-magnesium-based alloy or an aluminum-magnesium-silicon-based alloy.
Preferably, the deoxidized film solution in the step (1) is an acid solution.
Further preferably, the acid solution is a solution containing a strong acid, and the strong acid is at least one of sulfuric acid, hydrochloric acid, nitric acid, iodic acid or a mixture thereof.
Further preferably, the acid solution is a solution containing a medium strong acid, and the medium strong acid is at least one of oxalic acid, sulfurous acid, phosphoric acid, pyruvic acid, nitrous acid or a mixture thereof.
Further preferably, the acid solution is a solution containing a weak acid, the weak acid being at least one of citric acid, hydrofluoric acid, malic acid, gluconic acid, formic acid, lactic acid, benzoic acid, acrylic acid, acetic acid, propionic acid, stearic acid, carbonic acid, hydrogen sulfuric acid, hypochlorous acid, phenol, phosphoric acid, boric acid, silicic acid, or a mixture thereof.
Preferably, the deoxidized film solution in the step (1) is alkali liquor.
Further preferably, the alkali solution is a solution containing alkali, and the alkali is one of sodium hydroxide, potassium hydroxide or a mixture thereof.
Preferably, the polymer material in the step (1) is one of thermosetting plastic, thermoplastic plastic or a mixture thereof.
Further preferably, the polymer material is at least one of polyvinyl alcohol, polyethylene glycol, polyoxyethylene, polyacrylic acid, sodium polyacrylate, polyvinylpyrrolidone, propylene glycol, diethylene glycol, triethylene glycol, polypropylene glycol, triethanolamine, phenolic resin, polymethyl methacrylate or a mixture thereof.
Preferably, the solvent in the step (1) is any one of an aqueous solvent, an alcoholic solvent, an ether solvent, a lipid solvent, and an alkane solvent.
Further preferably, the alcohol solvent is one of ethanol and isopropanol or a mixture thereof, the ether solvent is diethyl ether, the lipid solvent is at least one of ethyl acetate, butyl acetate and amyl acetate or a mixture thereof, and the alkane solvent is at least one of n-hexane, cyclohexane, rosin water, kerosene and n-heptane or a mixture thereof.
Preferably, the product of step (1) is suspended in a mixture from which it is separated by filtration before proceeding to step (2).
Preferably, the metal powder wrapped by the polymer material in the step (2) is baked, and the polymer material on the surface of the metal powder is solidified.
Further preferably, the baking temperature is 140 ℃ to 200 ℃.
Preferably, in step (2) a metal powder is obtained with a particle size D90 distribution of 50 μm to 150. Mu.m.
In order to achieve the above purpose, the product in the technical scheme adopted by the invention is a metal powder wrapped by a polymer material, wherein the metal powder is prepared according to any one of the preparation methods.
In order to achieve the above purpose, the application of the technical scheme adopted by the invention is that the metal powder wrapped by the polymer material is applied to a metal injection molding process (Metal Injection Molding, MIM).
In order to achieve the above purpose, the method applied in the technical scheme adopted by the invention is that the metal part is prepared by using the metal powder wrapped by the polymer material, and the method comprises the following steps:
(a) Mixing and granulating the metal powder and a high polymer material;
(b) Performing metal injection molding on the particles obtained in the step (a) to obtain a primary product;
(c) Carrying out catalytic degreasing on the primary product obtained in the step (b) to obtain an intermediate product;
(d) Sintering the intermediate product obtained in the step (c) to obtain the metal part.
Preferably, the polymer material in the step (a) is one of polyoxymethylene, paraffin or a mixture thereof.
Preferably, the degreasing medium in the step (c) is nitric acid or oxalic acid, the degreasing temperature is 100-145 ℃, and the degreasing and acid injection time is 4-6 hours.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the preparation method of the metal powder wrapped by the polymer material overcomes the defect that an oxide film cannot be completely removed in the prior technology of removing the oxide film on the surface of the metal powder by singly using a chemical reaction mode or physical mechanical grinding, and the solution for removing the oxide film can completely perform chemical reaction on the surface of the metal powder, including the concave surface of metal powder particles or the surface which cannot be contacted by using physical mechanical grinding; the thick oxide film can be removed in a large scale by using a physical method, and the two ways are double guaranteed, so that the oxide film on the surface of the metal powder is completely and effectively removed.
2. According to the preparation method of the metal powder coated by the polymer material, the polymer material is coated on the surface of the metal powder from which the oxide film is removed to isolate oxygen, so that the regeneration of the oxide film on the surface of the metal powder is effectively avoided.
3. According to the metal powder coated by the high polymer material, the oxide film on the surface of the metal powder is removed and coated with the high polymer material, so that the metal powder can be applied to a metal injection molding process, and the application range of the metal material is increased.
4. According to the method for preparing the metal part by the metal powder wrapped by the polymer material, disclosed by the invention, the metal powder which is subjected to removal of the oxidation film and wrapped by the polymer material is mixed and granulated, the obtained granules are subjected to injection molding according to a Metal Injection Molding (MIM) process, and the metal part is obtained after degreasing and sintering, so that the metal part with a complex structure, small size and high compactness can be prepared, and the method has good economic benefit and wide application prospect.
Drawings
FIG. 1 is a process flow diagram of a method for preparing metal powder coated with a polymeric material according to the present invention.
FIG. 2 is a process flow diagram of a method of making a metal part using a metal powder coated with a polymeric material in accordance with the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention will be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
As shown in fig. 1, the invention provides a preparation method of metal powder wrapped by a polymer material, comprising the following steps:
1. mixing metal powder coated with an oxide film on the surface, deoxidized film solution, a high polymer material and a solvent for dissolving the high polymer material, placing the mixture into a closed container, placing the closed container on a ball mill, starting a power supply to adjust the rotating speed, enabling the closed container to rotate on the ball mill, so that mutual friction is generated between the metal powder, and physically removing the oxide film coated on the surface of the metal powder; in the mixing process, the deoxidized film solution and the oxide film are subjected to chemical reaction to chemically remove the oxide film, so as to obtain a mixture; suspending the product of the chemical reaction in the mixture, standing the mixture, and removing suspended substances in the mixture by filtering to obtain a mixture comprising metal powder with the oxide film removed and a solvent in which a polymer material is dissolved; the sequence of the process of chemically removing the oxide film and the process of physically removing the oxide film does not influence the final result;
2. and drying the metal powder in the mixture after the suspended matters are removed, volatilizing the solvent on the metal powder by using a dryer or a heating spray dryer, and wrapping the remaining polymer material on the surface of the metal powder to obtain the metal powder wrapped with the polymer material.
The metal powder with the surface coated with the oxide film in the step 1 is at least one of aluminum, aluminum alloy, magnesium alloy, titanium alloy, copper and copper alloy, and when the metal powder is aluminum alloy, the metal powder is preferably aluminum-magnesium-based alloy or aluminum-magnesium-silicon-based alloy.
The deoxidizing film solution in step 1 may be an acid solution or an alkali solution, and when it is an acid solution, the acid may be a strong acid, such as: sulfuric acid, hydrochloric acid, nitric acid, iodic acid; may be a medium strong acid such as: oxalic acid, sulfurous acid, phosphoric acid, pyruvic acid, nitrous acid; weak acids are also possible, such as: citric acid, hydrofluoric acid, malic acid, gluconic acid, formic acid, lactic acid, benzoic acid, acrylic acid, acetic acid, propionic acid, stearic acid, carbonic acid, hydrogen sulfuric acid, ammonium bifluoride, hydrogen peroxide, hypochlorous acid, phenol, phosphoric acid, boric acid, silicic acid; phosphoric acid, boric acid and silicic acid in weak acids are preferable in view of the reaction rate; when it is an alkaline solution, the base may be a strong base such as: potassium hydroxide, sodium hydroxide.
When the oxide film removing solution is selected, the oxide film is selected according to the characteristics of an oxide film wrapped by metal powder, such as magnesium oxide is usually hydrofluoric acid and ammonium bifluoride, titanium oxide is usually nitric acid, hydrofluoric acid and hydrogen peroxide, aluminum oxide is usually hydrochloric acid, nitric acid, sodium hydroxide, phosphoric acid and boric acid, and copper oxide is usually dilute sulfuric acid, dilute hydrochloric acid and acetic acid.
The high polymer material in the step 1 comprises thermosetting plastic or thermosetting plastic, and the high polymer material is dissolved in a corresponding solvent when in use; the solvent in the step 1 comprises an aqueous solvent, an alcohol solvent, an ether solvent, a lipid solvent and an alkane solvent, wherein the preferred solvents are alcohol solvents, ester solvents and alkane solvents, the preferred solvents are methanol, ethanol, isopropanol and butanol, the preferred solvents are diethyl ether, the preferred solvents are ethyl acetate, butyl acetate and amyl acetate, and the preferred solvents are n-hexane, cyclohexane, rosin water, kerosene and n-heptane; when the solvent in step 1 is an aqueous solvent, the polymer material in step 1 is preferably a thermosetting plastic or a thermoplastic plastic, such as: polyvinyl alcohol, polyethylene glycol, polyoxyethylene, polyacrylic acid, sodium polyacrylate, polyvinylpyrrolidone, propylene glycol, diethylene glycol, triethylene glycol, polypropylene glycol, triethanolamine; when the solvent in the step 1 is alcohols, the polymer material in the step 1 can be phenolic resin or polymethyl methacrylate; in view of toxicity, functionality, suitability and operability of the solvent, ethanol is preferable as the solvent in step 1, and phenolic resin and polymethyl methacrylate are preferable as the polymer material in step 1.
Preferably, the metal powder wrapped by the polymer material in the step 2 is baked, the polymer material on the surface of the metal powder is solidified, and the baking temperature is 140-200 ℃.
Preferably, the particle diameter D90 of the metal powder obtained in step 2 is distributed between 50 μm and 150. Mu.m.
The invention also provides a metal powder wrapped by the polymer material, wherein the metal powder is prepared according to any one of the preparation methods, and the metal powder can be applied to a metal injection molding process.
As shown in fig. 2, the present invention also provides a method for preparing a metal part using the above metal powder, comprising the steps of:
(a) Mixing and granulating the metal powder and a high polymer material;
(b) Performing metal injection molding on the particles obtained in the step (a) to obtain a primary product;
(c) Degreasing the primary product obtained in the step (b) to obtain an intermediate product;
(d) Sintering the intermediate product obtained in the step (c) to obtain the metal part.
Preferably, the polymer material in step (a) is Polyoxymethylene (POM) or paraffin WAX (WAX).
Preferably, the volume ratio of the metal powder to the polymer material in the step (a) is 1:0.8-1.3.
Preferably, the mixing in the step (a) is carried out in a banburying mode, the mixing temperature is 150-190 ℃, and the mixing time is 1-1.5 hours.
Preferably, the granules formed in step (a) are cylindrical and have a diameter of 2.5mm to 3.5mm and a length of 3mm to 5mm.
Preferably, the temperature of the injection nozzle in the metal injection molding in the step (b) is 180-210 ℃ and the molding pressure is 95-105 Mpa.
Preferably, the degreasing medium in the step (c) is nitric acid or oxalic acid, the degreasing temperature is 100-145 ℃, and the degreasing and acid injection time is 4-6 hours.
Preferably, the sintering temperature in the step (d) is 550-1250 ℃ and the sintering time is 2-3 hours, and the sintering temperature is matched with different temperature ranges according to different materials.
For a better illustration of the present invention, which is convenient for understanding the technical solution of the present invention, exemplary but non-limiting examples of the present invention are as follows:
example 1, as shown in fig. 1:
(1) Mixing 100g of aluminum-magnesium-silicon-based alloy powder (6 xxx series aluminum alloy), 0.1g of phosphoric acid, 2g of phenolic resin and 1000ml of ethanol solvent, placing the mixture in a ball mill barrel, ball milling for 2 hours to obtain a mixture, and removing surface suspended matters in the mixture to obtain aluminum alloy powder wrapped by the phenolic resin;
(2) And heating the aluminum alloy powder by using a granulator to evaporate the solvent or evaporating the solvent by spray drying to obtain the phenolic resin-coated bulk aluminum alloy powder, wherein the particle size D90 of the aluminum alloy powder is 50-150 mu m, and placing the aluminum alloy powder in an environment of 140 ℃ for baking to solidify the particle surfaces, thereby obtaining the phenolic resin-completely-coated aluminum alloy powder.
The aluminum alloy powder is applied to an injection molding (MIM) process and an aluminum alloy part is manufactured, and the method comprises the following steps:
(a) Mixing the aluminum alloy powder and Polyoxymethylene (POM) according to a volume ratio of 1:1, heating the mixture to 170 ℃ in an internal mixer, mixing for 1 hour, and then transferring the mixture into a granulator to obtain cylindrical particles with the particle size of 3mm and the length of 3-5 mm;
(b) Placing the cylindrical particles obtained in the step (a) into a material pipe of a forming machine through a nozzle at the temperature of 200 ℃, and performing injection forming under the forming pressure of 100MPa to obtain a green body with a required shape;
(c) Transferring the green body obtained in the step (b) into a catalytic degreasing furnace, and degreasing by acid injection for 4.5 hours in an environment of 100-120 ℃ by using nitric acid as a medium;
(d) And sintering the degreased product at 600 ℃ for 2.5 hours to obtain a 2.75g/cm < 3 > high-density aluminum-magnesium-silicon-based alloy sintered finished product.
Example 2:
(1) Mixing 100g of aluminum-magnesium-silicon-based alloy powder (6 xxx series aluminum alloy), 0.5g of boric acid, 2g of phenolic resin and 1000ml of ethanol solvent, placing the mixture in a ball mill barrel, ball milling for 2 hours to obtain a mixture, and removing surface suspended matters in the mixture to obtain aluminum alloy powder wrapped by the phenolic resin;
(2) And heating the aluminum alloy powder by using a granulator to evaporate the solvent or evaporating the solvent by spray drying to obtain the phenolic resin-coated bulk aluminum alloy powder, wherein the particle size D90 of the aluminum alloy powder is 50-150 mu m, and placing the aluminum alloy powder in an environment of 140 ℃ for baking to solidify the particle surfaces, thereby obtaining the phenolic resin-completely-coated aluminum alloy powder.
The aluminum alloy powder is applied to an injection molding (MIM) process and an aluminum alloy part is manufactured, and the method comprises the following steps:
(a) Mixing the aluminum alloy powder and Polyoxymethylene (POM) according to a volume ratio of 1:1, heating the mixture to 170 ℃ in an internal mixer, mixing for 1 hour, and then transferring the mixture into a granulator to obtain cylindrical particles with the particle size of 3mm and the length of 3-5 mm;
(b) Placing the cylindrical particles obtained in the step (a) into a material pipe of a forming machine through a nozzle at the temperature of 200 ℃, and performing injection forming under the forming pressure of 100MPa to obtain a green body with a required shape;
(c) Transferring the green body obtained in the step (b) into a catalytic degreasing furnace, and degreasing by acid injection for 4.5 hours in an environment of 100-120 ℃ by using nitric acid as a medium;
(d) And sintering the degreased product at 600 ℃ for 2.5 hours to obtain a high-density aluminum-magnesium-silicon-based alloy sintered finished product of 2.76g/cm < 3 >.
Example 3:
(1) Mixing 100g of aluminum-magnesium-silicon-based alloy powder (6 xxx series aluminum alloy), 0.6g of silicic acid, 2g of phenolic resin and 1000ml of ethanol solvent, placing the mixture in a ball mill barrel, ball milling for 2 hours to obtain a mixture, and removing surface suspended matters in the mixture to obtain aluminum alloy powder wrapped by the phenolic resin;
(2) And heating the aluminum alloy powder by using a granulator to evaporate the solvent or evaporating the solvent by spray drying to obtain the phenolic resin-coated bulk aluminum alloy powder, wherein the particle size D90 of the aluminum alloy powder is 50-150 mu m, and placing the aluminum alloy powder in an environment of 140 ℃ for baking to solidify the particle surfaces, thereby obtaining the phenolic resin-completely-coated aluminum alloy powder.
The aluminum alloy powder is applied to an injection molding (MIM) process and an aluminum alloy part is manufactured, and the method comprises the following steps:
(a) Mixing the aluminum alloy powder and Polyoxymethylene (POM) according to a volume ratio of 1:1, heating the mixture to 170 ℃ in an internal mixer, mixing for 1 hour, and then transferring the mixture into a granulator to obtain cylindrical particles with the particle size of 3mm and the length of 3-5 mm;
(b) Placing the cylindrical particles obtained in the step (a) into a material pipe of a forming machine through a nozzle at the temperature of 200 ℃, and performing injection forming under the forming pressure of 100MPa to obtain a green body with a required shape;
(c) Transferring the green body obtained in the step (b) into a catalytic degreasing furnace, and degreasing by acid injection for 4.5 hours in an environment of 100-120 ℃ by using nitric acid as a medium;
(d) And sintering the degreased product at 600 ℃ for 2.5 hours to obtain a high-density aluminum-magnesium-silicon-based alloy sintered finished product of 2.74g/cm < 3 >.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. A metal part made of metal powder, characterized in that the metal powder is made by the steps of:
(1) Mixing aluminum alloy powder coated with an oxide film on the surface, acid liquor, phenolic resin and ethanol, and then placing the mixture into a closed container for ball milling to obtain a mixture, wherein the aluminum alloy powder is aluminum-magnesium-silicon-based alloy powder;
the acid liquor is any one of phosphoric acid, boric acid and silicic acid, when the acid liquor is phosphoric acid, the mass ratio of the acid liquor to the aluminum alloy powder coated with the oxide film is 0.1:100, when the acid liquor is boric acid, the mass ratio of the acid liquor to the aluminum alloy powder coated with the oxide film is 0.5:100, when the acid liquor is silicic acid, the mass ratio of the acid liquor to the aluminum alloy powder coated with the oxide film is 0.6:100, the mass ratio of the phenolic resin to the aluminum alloy powder coated with the oxide film is 2:100, and the ratio of the ethanol to the aluminum alloy powder coated with the oxide film is 1000ml:100g;
(2) Removing suspended matters generated by chemical reaction of the acid liquor and the oxide film in the mixture in a filtering mode;
(3) Drying the mixture, volatilizing the ethanol to obtain bulk aluminum alloy powder coated with phenolic resin;
(4) And baking the bulk aluminum alloy powder to solidify phenolic resin on the surfaces of the particles to obtain the metal powder, wherein the metal powder is aluminum alloy powder with the surface completely wrapped by the solidified phenolic resin.
2. A metal part according to claim 1, characterized in that: the particle diameter D90 of the metal powder is 50-150 mu m.
3. A metal part according to claim 1, characterized in that: the baking temperature in the step (4) is 140-200 ℃.
4. A metal part according to claim 1, characterized in that: the metal part is prepared from the metal powder through mixing, granulating, injection molding, degreasing and sintering.
5. A metal part according to claim 4, characterized in that: the metal powder and the polyformaldehyde are adopted for mixing and granulating according to the volume ratio of 1:0.8-1:1.3, and the degreasing medium is nitric acid.
6. A metal part according to any one of claims 1-5, characterized in that: the density of the metal part is 2.74g/cm 3 、2.75 g/cm 3 Or 2.76g/cm 3 。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110878498.1A CN113681008B (en) | 2019-07-26 | 2019-07-26 | Metal part |
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| CN202110878498.1A CN113681008B (en) | 2019-07-26 | 2019-07-26 | Metal part |
| CN201910681239.2A CN110238388B (en) | 2019-07-26 | 2019-07-26 | Metal powder wrapped by high polymer material and preparation method and application thereof |
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| CN113681008A CN113681008A (en) | 2021-11-23 |
| CN113681008B true CN113681008B (en) | 2023-06-27 |
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| CN111168056A (en) * | 2020-01-17 | 2020-05-19 | 宁波柔创纳米科技有限公司 | Metal powder and method for reducing oxygen content of metal powder and improving oxidation resistance |
| CN113072384B (en) * | 2021-03-29 | 2022-11-29 | 安徽工业大学 | Oxide metallurgy process |
| CN113547118B (en) * | 2021-07-19 | 2023-08-01 | 江苏金物新材料有限公司 | Metal powder feeding mixing method for increasing capacity of binder |
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| CN1022468C (en) * | 1992-02-19 | 1993-10-20 | 北京市印刷技术研究所 | Surface treating method for electric conducting copper powder |
| CN101121202A (en) * | 2007-09-21 | 2008-02-13 | 南京大学 | Method for preparing shell-nucleus type nanometer iron-silver bimetallic granules |
| KR101308159B1 (en) * | 2011-11-01 | 2013-10-15 | 성균관대학교산학협력단 | Method of forming a high surface-area powder |
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| JP5843820B2 (en) * | 2013-08-13 | 2016-01-13 | Jx日鉱日石金属株式会社 | Method for producing surface-treated metal powder |
| CN104057082B (en) * | 2014-06-18 | 2016-04-27 | 南京理工大学 | A kind of preparation method of dioxide coated by nano titanium nickel powder |
| JP6424104B2 (en) * | 2015-02-09 | 2018-11-14 | Ｄｏｗａエレクトロニクス株式会社 | Copper powder for conductive paste and method for producing the same |
| CN104858425B (en) * | 2015-05-13 | 2017-02-22 | 同济大学 | Method for weakening oxidization of metal nanoparticles |
| CN104923796B (en) * | 2015-06-11 | 2017-03-29 | 中国石油大学(北京) | A kind of method of preparation of industrialization graphene coated nanometer aluminium powder |
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| CN106984805B (en) * | 2017-05-23 | 2020-07-10 | 昆山卡德姆新材料科技有限公司 | Feed for 3D printing and preparation method and application thereof |
| CN107745119A (en) * | 2017-09-07 | 2018-03-02 | 天津大学 | A kind of glass fluxing technique copper powder of high-temperature oxidation resistant and preparation method thereof |
| CN108465815B (en) * | 2018-02-13 | 2020-07-28 | 台州知管通科技有限公司 | Three-dimensional bicontinuous porous carbon-based transition metal porous material |
| CN108975269A (en) * | 2018-08-23 | 2018-12-11 | 杭州氢源素生物科技有限公司 | A kind of high-energy ball milling enhancing activation aluminium hydrogen manufacturing material |
| CN110238388B (en) * | 2019-07-26 | 2021-07-27 | 昆山卡德姆新材料科技有限公司 | Metal powder wrapped by high polymer material and preparation method and application thereof |
-
2019
- 2019-07-26 CN CN201910681239.2A patent/CN110238388B/en active Active
- 2019-07-26 CN CN202110878498.1A patent/CN113681008B/en active Active
-
2020
- 2020-07-24 KR KR1020227006223A patent/KR20220035969A/en not_active Application Discontinuation
- 2020-07-24 WO PCT/CN2020/104480 patent/WO2021018038A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN110238388A (en) | 2019-09-17 |
| CN113681008A (en) | 2021-11-23 |
| CN110238388B (en) | 2021-07-27 |
| WO2021018038A1 (en) | 2021-02-04 |
| KR20220035969A (en) | 2022-03-22 |
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