CN113319273B - Copper-tin composite spherical particle powder and preparation method thereof - Google Patents
Copper-tin composite spherical particle powder and preparation method thereof Download PDFInfo
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- CN113319273B CN113319273B CN202110756999.2A CN202110756999A CN113319273B CN 113319273 B CN113319273 B CN 113319273B CN 202110756999 A CN202110756999 A CN 202110756999A CN 113319273 B CN113319273 B CN 113319273B
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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
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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
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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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
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
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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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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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
Abstract
The invention discloses copper-tin composite spherical particle powder which comprises particle powder, wherein the particle powder is spherical or nearly spherical, the particle powder consists of copper particles and tin particles, and the copper particles and the tin particles are connected through a binder. The copper-tin composite spherical particle powder with the structure can reduce laser heat input, is beneficial to reducing the internal stress of a component, and improves the performance of material additive manufacturing of bronze components.
Description
Technical Field
The invention relates to the technical field of tin bronze powder materials for additive manufacturing, in particular to copper-tin composite spherical particle powder and a preparation method thereof.
Background
The tin bronze material has the characteristics of good heat conduction, electric conduction, wear resistance, corrosion resistance, good ductility and the like, and is widely applied to the fields of heat dissipation, electric power, bearings, pipelines and the like. However, as the design of the application end for the structural parts becomes more and more complex, the traditional machining process cannot meet the requirement of machining part parts. The additive manufacturing technology has the characteristics of high material utilization rate, high forming efficiency and the like, and has great potential in forming bronze parts with complex structures. However, since copper has high reflectivity to light, high thermal conductivity, and the like, laser energy absorption rate is low in the laser additive manufacturing process, and continuous melting is difficult, so that the part forming efficiency is low, the service performance is poor, and the metallurgical quality is difficult to control. In view of the above, it is necessary to design a copper-tin composite spherical particle powder and a preparation method thereof.
Disclosure of Invention
The invention aims to provide copper-tin composite spherical particle powder and a preparation method thereof, which can reduce laser heat input, are beneficial to reducing the internal stress of a component and improve the performance of an additive manufacturing bronze component.
In order to achieve the above object, the present invention provides a copper-tin composite spherical particle powder, including a particle powder, the particle powder being spherical or nearly spherical, the particle powder being composed of copper particles and tin particles, the copper particles and the tin particles being connected by a binder.
Preferably, the particle size of the granular powder is 20 to 80 μm.
Preferably, the diameters of the copper particles and the tin particles in the granulated powder are both 0.5 to 5 μm.
A preparation method of copper-tin composite spherical particle powder comprises the following steps:
(1) Preparing raw materials: preparing the superfine copper powder and the superfine tin powder prepared by the laser atomization method for later use, and then preparing a dispersing agent and a binder for later use;
(2) Preparing slurry: adding the raw materials into water, and stirring for 0.5-2 hours by using a magnetic stirrer to obtain uniform slurry;
(3) Spray drying: introducing the slurry into a spray drying agent for spray drying;
(4) Powder post-treatment: collecting powder from a spray dryer, laying the powder in a stainless steel disc, placing the stainless steel disc in a heating furnace for heat treatment, performing vacuum or hydrogen protection, and sieving the heat-treated powder to obtain 20-800 μm granular powder.
Preferably, the particle size of the superfine copper powder and the particle size of the superfine tin powder in the step (1) are both 0.5-5 μm.
Preferably, the binder in step (1) is polyvinyl alcohol, and the dispersant is polyethylene glycol.
Preferably, the raw materials in the step (2) include superfine copper powder, superfine tin powder, a dispersing agent and a binder, and the raw materials are weighed by using a balance, wherein the mass ratio of the superfine copper powder to the superfine tin powder is 9-1, the mass percentage content of the binder is 2-10%, and the mass percentage content of the dispersing agent is 1%.
Preferably, in the step (2), the raw materials are added into water, and the solid content is 50-80%.
Preferably, the pressure of a fan for spray drying in the step (3) is 2-5Bar, the outlet temperature is 150-250 ℃, and the diameter of a nozzle is 1-3mm.
Preferably, the heating temperature of the heating furnace in the step (4) is 150-200 ℃, the heat treatment time is 0.5-5h, the powder after heat treatment is sieved, a 200-mesh screen is selected to remove large-particle-size particles, and a 800-mesh screen is used to remove small-particle-size particles, so that particle powder with the particle size of 20-80 μm is obtained.
Therefore, the copper-tin composite spherical particle powder with the structure and the preparation method thereof can reduce laser heat input, are beneficial to reducing the internal stress of the component and improve the performance of the material-additive manufactured bronze component.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a copper-tin composite spherical particle powder according to the present invention;
FIG. 2 is an SEM image of a Cu-Sn composite spherical particle powder according to the present invention.
Detailed Description
The invention provides copper-tin composite spherical particle powder which comprises particle powder, wherein the particle powder is spherical or nearly spherical, the particle diameter of the particle powder is 20-80 mu m, the particle powder consists of copper particles and tin particles, and the copper particles and the tin particles are connected through a bonding agent. The diameters of the copper particles and the tin particles in the granulated powder are both 0.5 to 5 μm.
A preparation method of copper-tin composite spherical particle powder comprises the following steps:
(1) Preparing raw materials: preparing the superfine copper powder and the superfine tin powder prepared by a laser atomization method for standby, wherein the particle sizes of the superfine copper powder and the superfine tin powder are both 0.5-5 mu m, the mass ratio of the superfine copper powder to the superfine tin powder is 9, and then preparing a dispersing agent and a binder for standby, wherein the mass percentage of the binder is 2-10%, and the mass percentage of the dispersing agent is 1%;
(2) Preparing slurry: adding the raw materials into water, wherein the solid content is 50-80%, and stirring for 0.5-2 hours by using a magnetic stirrer to obtain uniform slurry;
(3) And (3) spray drying: introducing the slurry into a spray drying agent for spray drying, wherein the pressure of a fan is 2-5Bar, the outlet temperature is 150-250 ℃, and the diameter of a nozzle is 1-3mm;
(4) Powder post-treatment: collecting powder from a spray dryer, laying the powder in a stainless steel disc, placing the stainless steel disc in a heating furnace for heat treatment at the heating temperature of 150-200 ℃ for 0.5-5h, carrying out vacuum or hydrogen protection, screening the heat-treated powder, removing large-particle-size particles by using a 200-mesh screen, and removing small-particle-size particles by using a 800-mesh screen to obtain particle powder with the particle size of 20-800 mu m.
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Examples
A preparation method of copper-tin composite spherical particle powder comprises the following steps:
(1) Preparing raw materials: preparing superfine copper powder and superfine tin powder prepared by a laser atomization method for later use, wherein the particle sizes of the superfine copper powder and the superfine tin powder are both 1 mu m, the mass ratio of the superfine copper powder to the superfine tin powder is 9;
(2) Preparing slurry: adding the raw materials into water, wherein the solid content is 80%, and stirring for 2 hours by using a magnetic stirrer to obtain uniform slurry;
(3) And (3) spray drying: introducing the slurry into a spray drying agent for spray drying, wherein the pressure of a fan is 3Bar, the outlet temperature is 200 ℃, and the diameter of a nozzle is 2mm;
(4) Powder post-treatment: collecting powder from a spray dryer, laying the powder in a stainless steel disc, placing the stainless steel disc in a heating furnace for heat treatment at the heating temperature of 200 ℃ for 4h under vacuum or hydrogen protection, screening the heat-treated powder, removing large-particle-size particles by using a 200-mesh screen, and removing small-particle-size particles by using a 800-mesh screen to obtain 20-800 mu m granular powder, wherein the granular powder consists of copper particles 1 and tin particles 2.
Therefore, the copper-tin composite spherical particle powder with the structure and the preparation method thereof can reduce laser heat input, are beneficial to reducing the internal stress of the component and improve the performance of the material-additive manufactured bronze component.
Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (1)
1. The copper-tin composite spherical particle powder for additive manufacturing for reducing laser heat input is characterized in that: comprises granular powder, wherein the granular powder is spherical or approximately spherical, the granular powder consists of copper particles and tin particles, and the copper particles and the tin particles are connected through a binder; the preparation method of the copper-tin composite spherical particle powder comprises the following steps:
(1) Preparing raw materials: preparing the superfine copper powder and the superfine tin powder prepared by the laser atomization method for standby, wherein the grain diameters of the superfine copper powder and the superfine tin powder are both 0.5-1 mu m, and the mass ratio of the superfine copper powder to the superfine tin powder is 9:1, preparing a dispersing agent and a binder for later use, wherein the mass percentage of the binder is 2-10%, and the mass percentage of the dispersing agent is 1%;
(2) Preparing slurry: adding the raw materials into water, wherein the solid content is 50-80%, and stirring for 0.5-2 hours by using a magnetic stirrer to obtain uniform slurry;
(3) And (3) spray drying: introducing the slurry into a spray drying agent for spray drying, wherein the pressure of a fan is 2-5Bar, the outlet temperature is 150-250 ℃, and the diameter of a nozzle is 1-3mm;
(4) Powder post-treatment: collecting powder from a spray dryer, laying the powder in a stainless steel disc, placing the stainless steel disc in a heating furnace for heat treatment at the heating temperature of 150-200 ℃ for 0.5-5h, carrying out vacuum or hydrogen protection, screening the heat-treated powder, removing large-particle-size particles by using a 200-mesh screen, and removing small-particle-size particles by using a 800-mesh screen to obtain particle powder with the particle size of 20-80 microns.
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| CN202110756999.2A CN113319273B (en) | 2021-07-05 | 2021-07-05 | Copper-tin composite spherical particle powder and preparation method thereof |
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| CN113319273B true CN113319273B (en) | 2022-12-09 |
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| DE102006026235B4 (en) * | 2006-06-06 | 2008-12-04 | Skw Giesserei Gmbh | Process for the production of moldings and their use |
| CN103785860B (en) * | 2014-01-22 | 2016-06-15 | 宁波广博纳米新材料股份有限公司 | Metal dust of 3D printer and preparation method thereof |
| CN105033270A (en) * | 2015-08-18 | 2015-11-11 | 昆山德泰新材料科技有限公司 | Preparation method of porous copper-tin alloy powder |
| CN105382253B (en) * | 2015-12-10 | 2018-01-30 | 湖南省天心博力科技有限公司 | A kind of production method for being pre-mixed the bronze of copper and tin 10 |
| CN106216705B (en) * | 2016-09-19 | 2018-04-27 | 北京工业大学 | A kind of preparation method of 3D printing fine grained simple substance globular metallic powder |
| CN106424705B (en) * | 2016-10-09 | 2019-04-30 | 中国科学院宁波材料技术与工程研究所 | A kind of metal-powder and its preparation and application |
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