CN115889795A - Spherical tungsten-copper composite powder and preparation method thereof - Google Patents
Spherical tungsten-copper composite powder and preparation method thereof Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 88
- 239000002131 composite material Substances 0.000 title claims abstract description 80
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000000889 atomisation Methods 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 31
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 27
- 239000010937 tungsten Substances 0.000 claims abstract description 26
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 24
- 239000006185 dispersion Substances 0.000 claims abstract description 13
- 238000005457 optimization Methods 0.000 claims abstract description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 230000005514 two-phase flow Effects 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 229910052802 copper Inorganic materials 0.000 claims description 33
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 22
- 229910000691 Re alloy Inorganic materials 0.000 claims description 15
- 238000011068 loading method Methods 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 238000010902 jet-milling Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009689 gas atomisation Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 238000010146 3D printing Methods 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910000636 Ce alloy Inorganic materials 0.000 description 3
- 229910002530 Cu-Y Inorganic materials 0.000 description 3
- 229910000858 La alloy Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005551 mechanical alloying Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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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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- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of spherical tungsten-copper composite powder, which comprises W, cu and rare earth element RE, wherein tungsten powder is subjected to dispersion and morphology optimization pretreatment, then metals except tungsten are heated and melted, and two-phase flow consisting of the tungsten powder and high-pressure inert gas is taken as an atomizing medium to atomize a copper alloy liquid flow, so that the tungsten powder and crushed copper alloy liquid drops are compounded and solidified, thereby obtaining the spherical tungsten-copper composite powder. The method provided by the invention breaks through the limitation of the traditional atomization technology, successfully applies the gas atomization technology to the preparation of the tungsten-copper composite powder, and solves the problems that the existing preparation process is complex, and the morphology and particle size of the powder are not easy to control. The spherical tungsten-copper composite powder disclosed by the invention has the advantages of high sphericity, controllable particle size distribution and uniform tungsten-copper phase distribution.
Description
Technical Field
The invention belongs to the technical field of tungsten-copper composite material preparation, relates to spherical tungsten-copper composite powder, and further relates to a preparation method of the spherical tungsten-copper composite powder.
Background
The tungsten-copper composite material is a two-phase structure 'pseudo alloy' consisting of tungsten with high melting point and high hardness and copper with high electric conductivity and high heat conductivity, integrates the advantages of the tungsten and the copper, has higher high-temperature strength, good ablation resistance, fusion welding resistance and lower thermal expansion coefficient, and is widely applied to the fields of electronics, machinery, war industry, aerospace and the like. Because the melting points of tungsten and copper are greatly different and are not mutually soluble, the tungsten-copper composite material can only be manufactured by adopting a powder metallurgy method, but the complete densification of the tungsten-copper composite material is difficult to realize by the conventional infiltration method and the liquid phase sintering method. In order to obtain high-performance tungsten-copper composite materials, in recent years, under the lead of advanced powder metallurgy and 3D printing technology, the preparation of tungsten-copper composite powder is receiving wide attention.
At present, the preparation method of the tungsten-copper composite powder mainly comprises mechanical alloying, chemical coprecipitation, a sol-gel method and the like. The composite powder prepared by mechanical alloying is easy to have the defects of introduction of impurity elements and coarse grains, and although the chemical coprecipitation and sol-gel method can obtain the composite powder with high purity and uniform granularity, the process is complex and the batch production is difficult. More importantly, the composite powder prepared by the method is all in non-spherical irregular shapes, has poor fluidity and cannot meet the technical requirements of 3D printing. Therefore, the preparation of high-quality spherical tungsten-copper composite powder is urgent. The invention discloses a preparation method of tungsten-copper composite powder for 3D printing (CN 110614376A published Japanese 20191227), which discloses that spherical tungsten-copper composite powder with the particle size of below 50 micrometers is obtained through spray drying-two-stage heat treatment, but the preparation process is complex, the morphology and the particle size of the powder are greatly influenced by parameters such as time, temperature and the like, the powder is not easy to control, the heat treatment process is easy to integrally sinter, and stable batch production is difficult to realize. Gas atomization is one of the main preparation technologies of spherical metal powder, and because of the large melting point difference between tungsten and copper, no report exists for applying the gas atomization to the preparation of tungsten-copper composite powder at present, which greatly hinders the research and development and application of high-performance tungsten-copper composite materials.
Disclosure of Invention
The invention aims to provide a preparation method of spherical tungsten-copper composite powder, which breaks through the limitation of the traditional atomization technology and solves the problems of complex preparation process, difficult control of powder morphology and particle size in the prior art.
It is another object of the present invention to provide a spherical tungsten copper composite powder.
The technical scheme adopted by the invention is that the preparation method of the spherical tungsten-copper composite powder is implemented according to the following steps:
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder, and performing vacuum drying to obtain the finished spherical tungsten-copper composite powder.
The present invention is also characterized in that,
in the step 1, the tungsten powder is subjected to dispersion and morphology optimization pretreatment, specifically, a mechanical ball milling method or a fluidized bed type gas flow milling method is adopted, and high-purity nitrogen or argon is adopted as a protective medium or a working medium in the treatment process.
In the step 1, the purity of the tungsten powder is more than or equal to 99.9 wt%, and the grain diameter of the qualified tungsten powder is 1.0-20 μm.
In the step 2, RE in the Cu-RE alloy is one or more of rare earth elements La, ce, Y, sc, pr, nd and Yb;
the RE content of the rare earth element is 0.02-0.15 percent of the total mass of the pure copper block and the Cu-RE alloy.
In step 3, the degree of vacuum of evacuation is 4X 10 -3 Pa～8×10 -3 Pa, the protective gas adopts argon and the air pressure is 0.02 Pa-0.1 Pa.
In the step 3, the superheat degree is 200-350 ℃, and the heat preservation time is 4-6 min.
In step 4, the atomizing gas adopts N 2 Or Ar, the atomization air pressure is 3-5 MPa, and the tungsten powder flow is 8-16 cm 3 /s。
In the step 4, the inner diameter of the flow guide pipe is 1.5 mm-3.5 mm, and the length of the flow guide pipe extending out of the atomizing nozzle is 6 mm-10 mm.
The invention adopts another technical scheme that the spherical tungsten-copper composite powder is prepared by the preparation method.
The invention has the beneficial effects that:
(1) According to the preparation method of the spherical tungsten-copper composite powder, the high-melting-point tungsten component is introduced in a solid-phase atomizing medium manner and is compositely solidified with the low-melting-point copper in the atomizing process, so that the stable combination of tungsten and copper phases is realized, and the gas atomizing technology is successfully applied to the preparation of the tungsten-copper composite powder;
(2) According to the preparation method of the spherical tungsten-copper composite powder, the two-phase flow composed of the tungsten powder and the high-pressure inert gas is used as the atomizing medium, and compared with the traditional single gas atomizing medium, the preparation method has higher crushing and cooling efficiency, so that the consumption of the inert gas can be reduced, the grain refinement in the composite powder can be promoted, and the tissue uniformity of the tungsten-copper composite powder can be improved;
(3) The spherical tungsten-copper composite powder prepared by the invention can directly realize the sintering preparation of the tungsten-copper composite material at a lower temperature, saves the mixing procedure of powder of each element in the traditional powder metallurgy preparation method, has simple preparation process and is suitable for industrial production;
(4) The spherical tungsten-copper composite powder prepared by the method has higher sphericity and controllable particle size distribution, is suitable for 3D printing of tungsten-copper workpieces with complex shapes, and has wide application prospect;
(5) The preparation method of the spherical tungsten-copper composite powder can be used for preparing metal-based composite powder.
Drawings
FIG. 1 is a flow chart of the method for preparing the spherical tungsten-copper composite powder according to the present invention;
FIG. 2 is a schematic structural view of an apparatus used in the method for preparing a spherical tungsten-copper composite powder according to the present invention;
FIG. 3 is a schematic view of the tungsten-copper composite powder obtained in example 1 of the present invention;
FIG. 4 is a laser particle size distribution diagram of the tungsten-copper composite powder obtained in example 2 of the present invention.
In the figure, 1, a high-pressure gas cylinder, 2, a pressure reducing valve, 3, a mixer, 4, a loading pump cylinder, 5, a ball valve, 6, a crucible, 7, a plug, 8, a smelting chamber, 9, a flow guide pipe, 10, an atomizing nozzle, 11, a powder collecting system, 12, a vacuum pump and 13, an atomizing chamber.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a preparation method of spherical tungsten-copper composite powder, which is implemented according to the following steps as shown in figure 1:
an atomization device is adopted, as shown in fig. 2, the specific structure is as follows: including high-pressure gas cylinder 1 and smelting chamber 8, the bottleneck of high-pressure gas cylinder 1 is provided with relief pressure valve 2, relief pressure valve 2 is connected with blender 3, blender 3 is connected with year material pump barrel 4, it is provided with ball valve 5 to carry 4 discharge gates of material pump barrel, the bottom of smelting chamber 8 is connected with atomizer chamber 13, atomizer chamber 13 is connected with receipts powder system 11, vacuum pump 12, be provided with crucible 6 in the smelting chamber 8, 6 interpolations of crucible are equipped with plug 7, the bottom of plug 7 is connected with honeycomb duct 9, the bottom of crucible 6 is provided with atomizer 10, atomizer nozzle 10 sets up in atomizer chamber 13, honeycomb duct 9 stretches out crucible 6 and passes atomizer nozzle 10, atomizer nozzle 10 is connected with blender 3.
the dispersion and shape optimization pretreatment of the tungsten powder adopts a mechanical ball milling method or a fluidized bed type airflow milling method, and high-purity nitrogen or argon is used as a protective medium or a working medium in the treatment process. The tungsten powder particles after pretreatment are dispersed, agglomeration or adhesion phenomenon is avoided, good fluidity is achieved, blockage of a feeding pipeline in a subsequent atomization process is avoided, surface activity of the tungsten powder is improved, adsorption of the tungsten particles in a tungsten-copper two-phase compounding process is facilitated, and the purity of the tungsten powder is more than or equal to 99.9 wt%;
the qualified tungsten powder obtained after screening has the grain diameter of 1.0-20 mu m;
wherein, the qualified tungsten powder loading capacity needs to ensure the stable and continuous supply in the subsequent atomization process;
RE in the Cu-RE alloy is one or more of rare earth elements La, ce, Y, sc, pr, nd and Yb, is used for purifying a Cu matrix and refining the structure of the Cu matrix, reduces the surface tension of molten drops in the atomization process, promotes the wetting of tungsten and copper phases, enables the tungsten particles to be captured more easily to form tungsten and copper composite powder, and ensures the uniform distribution of the tungsten and copper phases;
the RE content of the rare earth element is 0.02 to 0.15 percent of the total mass of the pure copper block and the Cu-RE alloy; the purity of the pure copper block is more than or equal to 99.9wt.%;
wherein the RE content in the Cu-RE alloy is larger than the designed RE content in the total mass of the pure copper block and the Cu-RE alloy; the Cu-RE is used for providing RE elements, and the pure copper is used for providing main elements and diluting the RE content in the Cu-RE alloy, so that the RE content in the final atomized alloy melt is 0.02-0.15%. Because the rare earth pure metal is very easy to oxidize in the air, the RE element is introduced in an alloy mode;
the inner diameter of a flow guide pipe used in the atomization process is 1.5 mm-3.5 mm, the length of the flow guide pipe extending out of an atomization nozzle is 6 mm-10 mm, and the atomization nozzle is of a limiting annular hole structure;
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder by a screening method and a sedimentation separation method, and drying in vacuum to obtain the finished spherical tungsten-copper composite powder.
And the chemical components of the tungsten-copper composite powder are measured by an iodometry method.
Example 1
the dispersion and morphology optimization pretreatment of the tungsten powder adopts a fluidized bed type airflow milling method, high-purity nitrogen is used as a protective medium in the treatment process, the pretreated tungsten powder particles are dispersed without agglomeration or bonding, and the purity of the tungsten powder is more than or equal to 99.9 wt%;
the qualified tungsten powder obtained after screening has the particle size of 1.0-20 mu m;
the content of the rare earth element La is 0.02 percent of the total mass of the pure copper block and the Cu-La alloy;
the purity of the pure copper block is more than or equal to 99.9wt.%;
the inner diameter of a flow guide pipe used in the atomization process is 3.5mm, the length of the flow guide pipe extending out of the atomization nozzle is 10mm, and the atomization nozzle is of a limiting annular hole structure;
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder by a screening method and a sedimentation separation method, and drying in vacuum to obtain the finished spherical tungsten-copper composite powder, wherein the mass ratio of tungsten to the whole mass of the tungsten-copper composite powder is 10wt.%.
As shown in fig. 3, the composite powder has a uniform overall particle size and a high sphericity, and the tungsten particles are uniformly distributed on the surface of the composite powder or wrapped inside the powder.
Example 2
the dispersion and morphology optimization pretreatment of tungsten powder adopts a mechanical ball milling method, high-purity argon gas is used as a protective medium in the treatment process, the pretreated tungsten powder particles are dispersed without agglomeration or bonding, and the purity of the tungsten powder is more than or equal to 99.9 wt%;
the qualified tungsten powder obtained after screening has the particle size of 1.5-15 mu m;
the content of the rare earth element Ce is 0.08 percent of the total mass of the pure copper block and the Cu-Ce alloy;
the purity of the pure copper block is more than or equal to 99.9wt.%;
the inner diameter of a flow guide pipe used in the atomization process is 2.5mm, the length of the flow guide pipe extending out of the atomization nozzle is 8mm, and the atomization nozzle is of a limiting annular hole structure;
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder by a screening method and a sedimentation separation method, and drying in vacuum to obtain the finished spherical tungsten-copper composite powder, wherein the mass of tungsten accounts for 20 wt% of the whole mass of the tungsten-copper composite powder.
As shown in FIG. 4, the particle size of the composite powder was normally distributed over the whole, and the particle size was relatively small, wherein the average particle size D was 50 And 19 μm.
Example 3
the dispersion and morphology optimization pretreatment of the tungsten powder adopts a mechanical ball milling method, high-purity argon is used as a protective medium in the treatment process, the pretreated tungsten powder particles are dispersed, no agglomeration or bonding phenomenon exists, and the purity of the tungsten powder is more than or equal to 99.9 wt%;
the qualified tungsten powder obtained after screening has the particle size of 2-10 mu m;
the content of the rare earth element Y is 0.15 percent of the total mass of the pure copper block and the Cu-Y alloy;
the purity of the pure copper block is more than or equal to 99.9wt.%;
the inner diameter of a flow guide pipe used in the atomization process is 1.5mm, the length of the flow guide pipe extending out of an atomization nozzle is 6mm, and the atomization nozzle is of a limiting annular hole structure;
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder by a screening method and a sedimentation separation method, and drying in vacuum to obtain the finished spherical tungsten-copper composite powder, wherein the mass of tungsten accounts for 30 wt% of the whole mass of the tungsten-copper composite powder.
The results of the spectral analysis of the tungsten-copper composite powders obtained in examples 1 to 3 show that the oxygen content of the composite powder is less than 350ppm, the nitrogen content is less than 30ppm, and the prepared tungsten-copper composite powder has higher purity.
Claims (9)
1. The preparation method of the spherical tungsten-copper composite powder is characterized by comprising the following steps:
step 1, performing dispersion and morphology optimization pretreatment on tungsten powder, and screening to obtain qualified tungsten powder;
step 2, weighing the pure copper block and the Cu-RE alloy with the surface oxide layer removed for later use, and then loading the qualified tungsten powder obtained in the step 1 into a loading pump cylinder (4) for later use;
step 3, filling the pure copper blocks and the Cu-RE alloy weighed in the step 2 into a crucible (6) of a smelting chamber (8) of an atomizing furnace, vacuumizing, filling protective gas, heating to an overheating temperature and preserving heat to obtain copper alloy melt which is uniformly mixed;
step 4, opening a pressure reducing valve (2) for controlling atomization gas and a ball valve (5) for tungsten powder, adjusting the atomization gas pressure and the tungsten powder flow, and simultaneously lifting a plug (7), so that the copper alloy melt obtained in the step 3 flows out of a flow guide pipe (9), is impacted and broken into fine copper alloy molten drops by an atomization gas two-phase flow medium loaded with the tungsten powder, and the molten drops capture tungsten particles in the atomization medium and are rapidly solidified to obtain spherical tungsten-copper composite powder;
and 5, after cooling, collecting the spherical tungsten-copper composite powder obtained in the step 4, removing the additional metal powder, and performing vacuum drying to obtain the finished spherical tungsten-copper composite powder.
2. The method for preparing spherical tungsten-copper composite powder according to claim 1, wherein in step 1, the dispersion and morphology optimization pretreatment of the tungsten powder is performed by a mechanical ball milling method or a fluidized bed type jet milling method, and high-purity nitrogen or argon is used as a protective medium or a working medium in the treatment process.
3. The preparation method of the spherical tungsten-copper composite powder according to claim 1, wherein in the step 1, the purity of tungsten powder is not less than 99.9wt.%, and the grain size of qualified tungsten powder is 1.0-20 μm.
4. The method for preparing the spherical tungsten-copper composite powder according to claim 1, wherein in the step 2, RE in the Cu-RE alloy is one or more of rare earth elements La, ce, Y, sc, pr, nd and Yb;
the content of the rare earth element RE is 0.02-0.15 percent of the total mass of the pure copper block and the Cu-RE alloy.
5. The method for preparing a spherical tungsten-copper composite powder according to claim 1, characterized by comprising the steps ofIn step 3, the degree of vacuum of evacuation was 4X 10 -3 Pa～8×10 -3 Pa, argon is adopted as the protective gas, and the gas pressure is 0.02 Pa-0.1 Pa.
6. The method for preparing spherical tungsten-copper composite powder according to claim 1, wherein in step 3, the degree of superheat is 200 ℃ to 350 ℃ and the holding time is 4min to 6min.
7. The method for preparing spherical tungsten-copper composite powder according to claim 1, wherein in the step 4, N is used as the atomizing gas 2 Or Ar, the atomization air pressure is 3-5 MPa, and the tungsten powder flow is 8-16 cm 3 /s。
8. The method for preparing spherical tungsten-copper composite powder according to claim 1, wherein in the step 4, the inner diameter of the flow guide pipe is 1.5mm to 3.5mm, and the length of the flow guide pipe extending out of the atomizing nozzle is 6mm to 10mm.
9. Spherical tungsten-copper composite powder characterized by being produced by the production method according to any one of claims 1 to 7.
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| US5480472A (en) * | 1990-08-02 | 1996-01-02 | Kabushiki Kaisha Meidensha | Method for forming an electrical contact material |
| KR20120068116A (en) * | 2010-12-17 | 2012-06-27 | 한국세라믹기술원 | Manufacturing method of tungsten-copper nano composite powder and manufacturing method of tungsten-copper composite product using the same |
| CN102389979A (en) * | 2011-10-13 | 2012-03-28 | 西北工业大学 | Method and system for preparing particle-reinforced metal-based composite material through injection molding |
| CN105057680A (en) * | 2015-07-29 | 2015-11-18 | 昆山德泰新材料科技有限公司 | Preparation method of mechanical alloying copper-tungsten alloy powder |
| CN106048301A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Spray method for preparing tungsten-containing copper alloy powder |
| CN106319469A (en) * | 2016-10-28 | 2017-01-11 | 中国科学院宁波材料技术与工程研究所 | Preparation method for copper indium gallium alloy target material |
| CN110614376A (en) * | 2019-09-12 | 2019-12-27 | 北京工业大学 | Preparation method of tungsten-copper composite powder for 3D printing |
| CN111250720A (en) * | 2020-03-02 | 2020-06-09 | 合肥尚德新材料有限公司 | Method for preparing tungsten-copper composite material |
| CN111360274A (en) * | 2020-03-07 | 2020-07-03 | 福达合金材料股份有限公司 | Silver-tungsten electric contact material and preparation method thereof |
| CN113145855A (en) * | 2021-02-24 | 2021-07-23 | 山东大学 | Device and method for preparing high-melting-point alloy powder by electric arc |
| CN114525438A (en) * | 2022-02-16 | 2022-05-24 | 西安宝德九土新材料有限公司 | Tungsten-copper composite material and preparation method thereof |
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