CN108941596A - A kind of 3D printing special alloy powder and preparation method thereof - Google Patents
A kind of 3D printing special alloy powder and preparation method thereof Download PDFInfo
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- CN108941596A CN108941596A CN201811019242.XA CN201811019242A CN108941596A CN 108941596 A CN108941596 A CN 108941596A CN 201811019242 A CN201811019242 A CN 201811019242A CN 108941596 A CN108941596 A CN 108941596A
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- 239000000843 powder Substances 0.000 title claims abstract description 131
- 239000000956 alloy Substances 0.000 title claims abstract description 40
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 40
- 238000010146 3D printing Methods 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000000498 ball milling Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000010936 titanium Substances 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004411 aluminium Substances 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 11
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 12
- 238000001694 spray drying Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- -1 and power 45kw Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- 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
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention provides a kind of preparation methods of 3D printing special alloy powder, comprising the following steps: ball milling after mixing tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve obtains mixed metal powder；The mixed metal powder is subjected to induction plasma spheroidising, obtains 3D printing special alloy powder.The preparation method is melted and is vaporized to material powder as heat source using the high temperature of plasma, the spheroidization process to irregular material powder may be implemented, the physics and chemical characteristic that powder can effectively be improved, being mainly manifested in improves the mobility of alloy powder, the brittleness for the porosity for reducing powder, improving powder density, reducing powder, improves particle surface finish, improve powder purity, be precisely controlled oxygen content.Record according to the embodiment, the 3D printing special alloy powder powder density with higher obtained using preparation method of the present invention, preferable mobility and more accurately oxygen content.
Description
Technical field
The present invention relates to 3D printing technique fields more particularly to a kind of 3D printing special alloy powder and preparation method thereof.
Background technique
Increasing material manufacturing (also known as 3D printing) directly manufactures three by layer-by-layer build-up materials under the driving of part three-dimensional data
Entity component is tieed up, has many characteristics, such as Grazing condition, networking, intelligence, change manufacturing " the is described as by " economist " magazine
The industrial revolution three times ".
Currently, having had tens of kinds of increases material manufacturing technologies, such as selective light solidification (SLA), melting extrusion deposition
(FDM), layer separated growth (LOM) etc..The material that most of increases material manufacturing technology is utilized is paper, wax, plastics, macromolecule
Material etc., technology relative maturity.And the increases material manufacturing technology of the common metal material of industry is started late relatively, is current increasing material
The important development direction of manufacturing technology.But metal material described in the prior art is lacked since powder morphology is uncontrollable, granularity is big
Falling into makes its energy reflect height, poor fluidity, high oxygen content, and powder quality is uncontrollable, serious to restrict pushing away for 3D rapid metallic prototyping technique
It is wide and universal.
Summary of the invention
The purpose of the present invention is to provide a kind of 3D printing special alloy powder and preparation method thereof, are provided using the present invention
The 3D printing special alloy powder size that is prepared of method is small and morphology controllable.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of preparation methods of 3D printing special alloy powder, comprising the following steps:
Ball milling after tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve are mixed, obtains mixed metal powder；
The mixed metal powder is subjected to induction plasma spheroidising, obtains 3D printing special alloy powder.
Preferably, the mass ratio of the tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve is (245~2350): (40~
70): (18~38): (3~13): (0.5~2).
Preferably, the ball milling is wet ball grinding, 32~36 hours time of the wet ball grinding.
Preferably, the partial size of the mixed metal powder is 0.8~3 μm.
Preferably, after the wet ball grinding further include: the ball milling powder is dried, obtains mixed metal powder；
The drying is spray drying, and dry pressure is 0.8~1.1MPa, and dry temperature is 180~200 DEG C.
Preferably, the ion-gas gas source of the induction plasma spheroidising is Ar and H2, the Ar and H2Volume be than
(22~26): 1.
Preferably, the power of the induction plasma spheroidising is 45~60kw.
Preferably, the powder feeding rate of the induction plasma spheroidising is 5~10kg/h.
The present invention also provides the 3D printing special alloy powder that above-mentioned preparation method is prepared, which is characterized in that institute
The partial size for stating 3D printing special alloy powder is 45~85 μm.
The present invention provides a kind of preparation methods of 3D printing special alloy powder, comprising the following steps: by tungsten carbide powder,
Ball milling after cobalt powder, chromium powder, aluminium powder and titanium valve mixing, obtains mixed metal powder；The mixed metal powder is incuded etc.
Ion spheroidising obtains 3D printing special alloy powder.The preparation method is using the high temperature of plasma as heat source pair
Material powder is melted and is vaporized, and may be implemented effectively improve powder to the spheroidization process of irregular material powder
It is close to be mainly manifested in the mobility, the porosity for reducing powder, raising powder for improving alloy powder for the physics and chemical characteristic at end
Degree, improves particle surface finish, improves powder purity, is precisely controlled oxygen content the brittleness for reducing powder.It is according to the embodiment
It records, the granularity of the 3D printing special alloy powder obtained using preparation method of the present invention is 45~85 μm, vibration density
Degree is 9.0~11.0g/cc, and Hall flow velocity is 6.0~8.0secc/50g, and oxygen content 0.018% illustrates powder with higher
Last density, preferable mobility and more accurately oxygen content.
Detailed description of the invention
Fig. 1 is the SEM figure for the 3D printing special alloy powder that embodiment 1 is prepared.
Specific embodiment
The present invention provides a kind of preparation methods of 3D printing special alloy powder, comprising the following steps:
Ball milling after tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve are mixed, obtains mixed metal powder；
The mixed metal powder is subjected to induction plasma spheroidising, obtains 3D printing special alloy powder.
Preferably, the ion-gas gas source of the induction plasma spheroidising is Ar and H2,.
Ball milling after the present invention mixes tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve, obtains mixed metal powder；At this
In invention, the tungsten carbide powder, cobalt powder, chromium powder, independent preferably 1~10 μm of partial size of aluminium powder and titanium valve, more preferably 2~
8 μm, most preferably 4~6 μm.
In the present invention, the mass ratio of the tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve be preferably (245~
2350): (40~70): (18~38): (3~13): (0.5~2), more preferably (300~2200): (45~65): (25~
35): (5~10): (1.0~1.5), most preferably (500~2000): (50~60): (28~32): (6~8): (1.2~
1.3)。
In the present invention, the ball milling is preferably wet ball grinding；The ball-milling medium of the wet ball grinding is preferably water.At this
In invention, the tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and the total amount of titanium valve and the mass ratio of water are preferably (20~25): 100,
More preferably (21~24): 100, most preferably (22~23): 100.
In the present invention, the time of the ball milling is preferably 32~36 hours, and more preferably 33~35 hours.The present invention couple
The other conditions of the ball milling do not have any special restriction, carry out ball milling using ball milling parameter well known to those skilled in the art
?.
After wet ball grinding further include: the ball milling powder is dried, obtains mixed metal powder；In the present invention,
The mode of the drying is preferably spray-dried；The pressure of the spray drying is preferably 0.8~1.1MPa, and more preferably 0.9
~1.0MPa；The spray drying is preferably 180~200 DEG C in the temperature of feed inlet, and more preferably 185~195 DEG C, most preferably
It is 188~192 DEG C；The spray drying is preferably 100~120 DEG C in the temperature of discharge port, and more preferably 105~115 DEG C, most
Preferably 108~112 DEG C.
In the present invention, the spray drying preferably carries out in the spray drying tower.
In the present invention, the partial size of the mixed metal powder is preferably 0.8~3 μm, more preferably 1~2.5 μm, optimal
It is selected as 1.5~2 μm.
It is last to obtain mixed metal powder, the mixed metal powder is carried out induction plasma spheroidising by the present invention, is obtained
To 3D printing special alloy powder.
In the present invention, the ion-gas gas source of the induction plasma spheroidising is preferably Ar and H2, the Ar and H2's
Volume ratio is preferably (22~26): 1, more preferable (23~25): 1, most preferably (23.5~24.5): 1；The induction plasma
The quenching gas of spheroidising is preferably the Ar recycled.In the present invention, the power of the induction plasma spheroidising is preferred
For 45~60Kw, more preferably 46~49Kw, most preferably 47~48Kw.In the present invention, at the induction plasma nodularization
The powder feeding rate of reason is preferably 5~10Kg/h, more preferably 6~9Kg/h, most preferably 7~8Kg/h.
After the completion of induction plasma spheroidising, the present invention is preferably received from the reactor bottom of induction plasma spheroidising
Collect mixture, obtains 3D printing special alloy powder.
The present invention also provides a kind of 3D printing special alloy powder that above-mentioned preparation method is prepared, in the present invention
In, the partial size of the 3D printing special alloy powder is preferably 45~85 μm, more preferably 50~80 μm, most preferably 55~75
μm。
A kind of 3D printing special alloy powder provided by the invention is described in detail below with reference to embodiment, still
They cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
It is the Co powder of 1~10 μm of 60 parts by weight by partial size, the Cr powder of 32 parts by weight, the Al powder of 7 parts by weight,
Water wet ball grinding 32 hours of the Ti powder of 1 parts by weight, the WC powder of 1900 parts by weight and 8000 parts by weight are mixed, and are being sprayed
In mist drying tower, be spray-dried under the pressure of 0.8MPa (inlet temperature of spray drying tower be 180 DEG C, discharge port
Temperature be 120 DEG C), obtain partial size be 2 μm or so mixed metal powders；
Using Ar and H2For plasma source, the Ar of circulation is quenching gas, and power 45kw, powder feeding rate is 5Kg/h's
Condition, carries out induction plasma spheroidising to the mixed metal powder, collects mixture from reactor bottom, obtains 3D and beat
Print special alloy powder；
Fig. 1 is that the SEM of the 3D printing special alloy powder schemes, and as seen from the figure, alloy powder of the present invention carries out
Pattern after spheroidising is ball-type and granularity is small.
Embodiment 2
It is the Co powder of 1~10 μm of 50 parts by weight, the Cr powder of 38 parts by weight, the Al powder of 10 parts by weight by partial size
Water wet ball grinding 36 hours of end, the Ti powder of 2 parts by weight, the WC powder of 1900 parts by weight and 8000 parts by weight are mixed,
In the spray drying tower, be spray-dried under the pressure of 1.0MPa (inlet temperature of spray drying tower be 200 DEG C, out
The temperature of material mouth is 120 DEG C), obtaining partial size is 2 μm or so mixed metal powders；
Using Ar and H2For plasma source, the Ar of circulation is quenching gas, and power 45kw, powder feeding rate is 5Kg/h's
Condition, carries out induction plasma spheroidising to the mixed metal powder, collects mixture from reactor bottom, obtains 3D and beat
Print special alloy powder.
Embodiment 3
It is the Co powder of 1~10 μm of 70 parts by weight by partial size, the Cr powder of 20 parts by weight, the Al powder of 9 parts by weight,
Ti powder, the WC powder mixing of 1900 parts by weight and being mixed for water wet ball grinding 36 hours for 8000 parts by weight of 1 parts by weight,
In the spray drying tower, be spray-dried under the pressure of 1.0MPa (inlet temperature of spray drying tower be 190 DEG C, out
The temperature of material mouth is 100 DEG C), obtaining partial size is 2 μm or so mixed metal powders；
Using Ar and H2For plasma source, the Ar of circulation is quenching gas, and power 45kw, powder feeding rate is 5Kg/h's
Condition, carries out induction plasma spheroidising to the mixed metal powder, collects mixture from reactor bottom, obtains 3D and beat
Print special alloy powder.
Embodiment 4
3D printing special alloy powder obtained in embodiment 1 is characterized using Particle Size Analyzer；
3D printing special alloy powder obtained in embodiment is measured using TCH-600 oxygen-nitrogen analyzer；
The characterization of powder fluidity is carried out to the 3D printing special alloy powder that embodiment 1 obtains using the Hall time；
Its test result is as shown in Table 1 and Table 2:
Table 1: the performance indicator for the 3D printing special alloy powder that embodiment 1 obtains
Table 2: the particle diameter distribution for the 3D printing special alloy powder that embodiment 1 obtains
| Project | < 45um | 45-55um | 55-65um | 65-75um | 75-85um | Greater than 55um |
| Measured value | 0.3 | 22.9 | 24.8 | 31.6 | 20.3 | 0.1% |
By Tables 1 and 2 it is found that the granularity of 3D printing special alloy powder of the present invention is 45~85 μm, vibration density
Degree is 9.0~11.0g/cc, and Hall flow velocity is 6.0~8.0secc/50g, and oxygen content 0.018% illustrates powder with higher
Last density, preferable mobility and more accurately oxygen content.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of preparation method of 3D printing special alloy powder, comprising the following steps:
Ball milling after tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve are mixed, obtains mixed metal powder；
The mixed metal powder is subjected to induction plasma spheroidising, obtains 3D printing special alloy powder.
2. preparation method as described in claim 1, which is characterized in that the tungsten carbide powder, cobalt powder, chromium powder, aluminium powder and titanium valve
Mass ratio be (245~2350): (40~70): (18~38): (3~13): (0.5~2).
3. preparation method as described in claim 1, which is characterized in that the ball milling is wet ball grinding, the wet ball grinding
Time 32~36 hours.
4. preparation method as claimed in claim 1 or 3, which is characterized in that the partial size of the mixed metal powder is 0.8~3 μ
m。
5. preparation method as claimed in claim 3, which is characterized in that after the wet ball grinding further include: by the ball milling powder
Material is dried, and obtains mixed metal powder；The drying is spray drying, and dry pressure is 0.8~1.1MPa, dry
Temperature is 180~200 DEG C.
6. preparation method as described in claim 1, which is characterized in that the ion-gas gas source of the induction plasma spheroidising
For Ar and H2, the Ar and H2Volume be than (22~26): 1.
7. preparation method as described in claim 1, which is characterized in that the power of the induction plasma spheroidising be 45~
60kw。
8. preparation method as described in claim 1, which is characterized in that the powder feeding rate of the induction plasma spheroidising is 5
~10kg/h.
9. the 3D printing special alloy powder that preparation method according to any one of claims 1 to 8 is prepared, feature exist
In the partial size of the 3D printing special alloy powder is 45~85 μm.
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| CN110052616A (en) * | 2019-06-03 | 2019-07-26 | 湖南伊澍智能制造有限公司 | A kind of 3D printing alloy powder and preparation method thereof |
| CN110124591A (en) * | 2019-05-29 | 2019-08-16 | 郑州大学 | Sub-micron or nano particle cladding spherical powder and preparation method thereof |
| CN110253028A (en) * | 2019-07-16 | 2019-09-20 | 湖南伊澍智能制造有限公司 | A kind of self-lubricating 3D printing alloy powder and preparation method thereof |
| CN110385430A (en) * | 2019-08-21 | 2019-10-29 | 西迪技术股份有限公司 | A kind of powder body material of 3D printing |
| CN110756815A (en) * | 2019-10-22 | 2020-02-07 | 华南理工大学 | A kind of aluminum alloy composite powder and its preparation method and application |
| CN111482611A (en) * | 2019-03-07 | 2020-08-04 | 安徽中体新材料科技有限公司 | Preparation method of spherical tungsten carbide-cobalt powder for 3D printing |
| CN112828297A (en) * | 2020-12-31 | 2021-05-25 | 广东省科学院新材料研究所 | A kind of nickel-based ceramic composite material and its preparation method and application |
| CN114570923A (en) * | 2022-03-18 | 2022-06-03 | 陕西智奇开物新材料有限公司 | Superfine spherical alloy powder and preparation method thereof |
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| EP4041510A4 (en) * | 2019-10-11 | 2023-10-04 | Global Tungsten & Powders LLC | PRINTABLE AND SINTERABLE CARBIDE AND CERMETAL POWDER FOR GENERATIVE MANUFACTURING ON A POWDER BED BASE |
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