CN106166616A - A kind of preparation method of 3D printing metal dust - Google Patents
A kind of preparation method of 3D printing metal dust Download PDFInfo
- Publication number
- CN106166616A CN106166616A CN201610863066.2A CN201610863066A CN106166616A CN 106166616 A CN106166616 A CN 106166616A CN 201610863066 A CN201610863066 A CN 201610863066A CN 106166616 A CN106166616 A CN 106166616A
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- Prior art keywords
- metal dust
- preparation
- printing metal
- alloy
- printing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 50
- 238000010146 3D printing Methods 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 239000000956 alloy Substances 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 11
- 238000000498 ball milling Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 20
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 238000000889 atomisation Methods 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 239000003979 granulating agent Substances 0.000 claims description 6
- 208000011117 substance-related disease Diseases 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 12
- 238000005275 alloying Methods 0.000 abstract description 2
- 238000005204 segregation Methods 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000000227 grinding Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002893 slag 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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- 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
-
- 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
-
- 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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention relates to the preparation method of a kind of 3D printing metal dust, it includes each metal simple-substance is carried out melting, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；Alloy strip is immersed in hydrochloric acid, is washed out, is dried；The dried alloy strip of cutting, then ball milling, obtain alloyed powder；By alloyed powder and liquid mixing, and add organic bond and stir, be configured to metal powder slurry；Again slurry is made spherical 3D printing metal dust by sponging granulator.Aluminium alloy is thrown away by the present invention by the red copper wheel rotated; aluminium alloy can be made quickly to cool down; ensure that metal is shorter in the hot stage time of staying; alloying element has little time diffusion; thus thinning microstructure; reduce segregation, then can be prepared by sponging granulator that particle diameter is little, the 3D printing metal dust of uniform particle sizes.
Description
Technical field
The present invention relates to 3D printing metal dust, the preparation method of a kind of 3D printing metal dust.
Background technology
" 3D printing " technology, also referred to as increases material manufacturing technology, belongs to the one of rapid shaping technique.It is a kind of with number
Based on word model file, the discrete and numerical control molding system by software hierarchy, utilize the mode such as laser beam, hot melt nozzle by powder
Powder metal or plastics etc. can successively be piled up and cohere superposition molding by jointing material, finally produce the technology of entity products.
The central principle that 3D prints is " Layered manufacturing, successively superposition ", and compared with the manufacturing technology of tradition " subtracting material manufacture ", 3D prints
Technology by machinery, material, computer, communicate, the technological incorporation such as control technology and biomedicine through, have realize integrally manufactured
Complex-shaped workpieces, it is greatly shortened life cycle of the product, saves lot of materials, improve the clear superiority such as production efficiency.Concrete next
Saying: first, the application of 3D printing technique will constantly expand；Secondly, 3D printing technique is in the application of each application
Aspect deepens continuously；Furthermore, the materialization form of 3D printing technique self will be abundanter.Thus, this technology is inevitable soon
Rapid osmotic is to national defence, Aero-Space, electric power, automobile, biomedical mould, casting, electric power, agricultural, household electrical appliances, technique in the future
The numerous areas such as the fine arts, animation, profound influence the design concept in above-mentioned field, and coordinates that other technologies are perfect, even updates
Some quotidian fabrication scheme, makes manufacture the most intelligent, simple and direct, green, and properties of product more press close to perfect condition.Now
3D printing technique has become one of emerging technology of paying close attention to most in the whole world.This novel mode of production and other digital production moulds
Formula will promote the realization of the third time industrial revolution together.The wherein big bottleneck that restriction 3D printing technique develops rapidly is to print material
Material, particularly metallic print material.Research and development and the metal material that production performance is more preferable and versatility is higher are to carry 3D printing technique
Key.Directly use 3D printing technique manufacture view at high-performance metal component, need that particle diameter is thin, uniform particle sizes, high spherical
Degree, all kinds of metal dusts of low oxygen content.
Summary of the invention
For above-mentioned technical problem, the present invention provide one to prepare particle diameter is less, the more uniform 3D of particle diameter prints and uses
The preparation method of metal dust.
The technical solution used in the present invention is: the preparation method of a kind of 3D printing metal dust, and it comprises the following steps:
(1) each metal simple-substance is carried out melting, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；
(2) the red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；
(3) alloy strip is immersed in hydrochloric acid, is washed out, is dried；
(4) the dried alloy strip of cutting, then ball milling, obtains alloyed powder；
(5) by alloyed powder and liquid mixing, and add organic bond and stir, be configured to metal powder slurry；
(6) again slurry is made spherical 3D printing metal dust by sponging granulator.
As preferably, described metal simple-substance uses aluminum shot, shot copper and nickel shot, and wherein the content of nickel is 10wt%, the content of aluminum
Being 12 wt %, surplus is copper.
As preferably, described liquid uses distilled water or deionized water, and the mass ratio of alloyed powder and liquid is (2.5
3): 1.
As preferably, described organic bond uses metal granulating agent, and its addition is the 2 4% of alloyed powder quality.
As preferably, described sponging granulator uses centrifugal spraying granulator or press atomization comminutor.
As preferably, the rotating speed of described centrifugal spraying granulator is 5,000 8000 revs/min, the pressure of press atomization comminutor
Power is 15 25kg/ cm 2。
As preferably, the inlet temperature of described sponging granulator dry air is 250 350 DEG C, outlet temperature is 100
150℃；The flow of dry air is 100 200 Nm3 /h；Charging rate is 10 20 kg/h.
As can be known from the above technical solutions, aluminium alloy is thrown away by the present invention by the red copper wheel rotated, and aluminium alloy can be made quick
Cooling, it is ensured that metal is shorter in the hot stage time of staying, alloying element has little time to spread, thus thinning microstructure, reduce segregation,
Can be prepared that particle diameter is little, the 3D printing metal dust of uniform particle sizes again by sponging granulator.
Detailed description of the invention
The present invention is described more detail below, and illustrative examples and explanation in this present invention are used for explaining the present invention,
But it is not as a limitation of the invention.
A kind of preparation method of 3D printing metal dust, it comprises the following steps:
With aluminum, copper, nickel shot as raw material, and by the content of nickel be 10wt%, the content of aluminum be 12 wt %, surplus be that copper is joined
Material；Then being placed in induction heater by aluminum shot, aluminum shot adds shot copper and nickel shot after dissolving and carries out melting, until molten clear after drag for clean floating
Slag, obtains aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；By alloy strip
It is immersed in several minutes in the hydrochloric acid of 10%, to remove the oxide layer of alloy strip surface, and through the rinsing of repeatedly distilled water and dehydrated alcohol
After cleaning, then dry in vacuum drying oven；The dried alloy strip of cutting, then ball milling, obtain alloyed powder；Ball-milling Time is
18 22h, ratio of grinding media to material is 4.5:1；Then by alloyed powder and liquid mixing, and add metal granulating agent and stir, be configured to
Metal powder slurry；Again slurry is prepared spherical, that particle diameter is less, grain by centrifugal spraying granulator or press atomization comminutor
The 3D printing metal dust that footpath is evenly distributed.
Embodiment 1
Being placed in induction heater by 1wt % aluminum shot, aluminum shot adds 89wt % shot copper after dissolving and 10wt% nickel shot carries out melting,
Until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling is closed
Gold ribbon；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and after the rinsing of repeatedly distilled water and washes of absolute alcohol, then
Dry in vacuum drying oven；Then the dried alloy strip of cutting, then use the ratio of grinding media to material ball milling 18h of 4.5:1, obtain alloy
Powder；Then alloyed powder is mixed with distilled water, and the mass ratio of alloyed powder and distilled water is 2.5:1, and add alloyed powder quality
2% metal granulating agent stir, be configured to metal powder slurry；Again slurry is carried out pelletize by centrifugal spraying granulator, its
The inlet temperature of middle sponging granulator dry air is 250 DEG C, outlet temperature is 100 DEG C, the flow of dry air is 100 Nm3 / h, charging rate are 10kg/h, and the rotating speed of centrifugal spraying granulator is 5,000 8000 revs/min, thus obtain spherical 3D and beat
Print metal dust；The particle size distribution range of this metal dust is 52 75nm, and hardness is up to 38.3HRC.
Embodiment 2
Being placed in induction heater by 1.5 wt % aluminum shots, aluminum shot adds 88.5 wt % shot coppers after dissolving and 10wt% nickel shot is carried out
Melting, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, cooling
Obtain alloy strip；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and through the rinsing of repeatedly distilled water and washes of absolute alcohol
After, then dry in vacuum drying oven；Then the dried alloy strip of cutting, then use the ratio of grinding media to material ball milling 18h of 4.5:1,
To alloyed powder；Then alloyed powder is mixed with deionized water, and the mass ratio of alloyed powder and deionized water is 2.8:1, and add
3% metal granulating agent of alloyed powder quality stirs, and is configured to metal powder slurry；Again by slurry by press atomization comminutor
Carry out pelletize, wherein the inlet temperature of sponging granulator dry air be 300 DEG C, outlet temperature be 130 DEG C, the stream of dry air
Amount is 150 Nm3 / h, charging rate are 15 kg/h, and the pressure of press atomization comminutor is 25kg/ cm 2, thus obtain ball
The 3D printing metal dust of shape；The particle size distribution range of this metal dust is 48 69nm, and hardness is up to 46.1HRC.
Embodiment 3
Being placed in induction heater by 2 wt % aluminum shots, aluminum shot adds 88wt % shot copper after dissolving and 10wt% nickel shot carries out melting,
Until molten clear after drag for clean scum silica frost, obtain aluminium alloy；The red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling is closed
Gold ribbon；Alloy strip is immersed in several minutes in the hydrochloric acid of 10%, and after the rinsing of repeatedly distilled water and washes of absolute alcohol, then
Dry in vacuum drying oven；Then the dried alloy strip of cutting, then use the ratio of grinding media to material ball milling 18h of 4.5:1, obtain alloy
Powder；Then alloyed powder is mixed with deionized water, and the mass ratio of alloyed powder and deionized water is 3:1, and add alloy opaque
4% metal granulating agent of amount stirs, and is configured to metal powder slurry；Again slurry is carried out pelletize by press atomization comminutor,
Wherein the inlet temperature of sponging granulator dry air be 350 DEG C, outlet temperature be 150 DEG C, the flow of dry air be 200
Nm 3 / h, charging rate are 20 kg/h, and the pressure of press atomization comminutor is 15kg/ cm 2, thus obtain spherical 3D and beat
Print metal dust；The particle size distribution range of this metal dust is 53 70nm, and hardness is up to 38.9HRC.
The technical scheme provided the embodiment of the present invention above is described in detail, specific case used herein
Principle and embodiment to the embodiment of the present invention are set forth, and the explanation of above example is only applicable to help to understand this
The principle of inventive embodiments；Simultaneously for one of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
All will change in formula and range of application, in sum, this specification content should not be construed as limitation of the present invention.
Claims (7)
1. a preparation method for 3D printing metal dust, it comprises the following steps:
(1) each metal simple-substance is carried out melting, until molten clear after drag for clean scum silica frost, obtain aluminium alloy；
(2) the red copper wheel surface that alloy liquid droplet drops down onto high speed rotating throws away, and cooling obtains alloy strip；
(3) alloy strip is immersed in hydrochloric acid, is washed out, is dried；
(4) the dried alloy strip of cutting, then ball milling, obtains alloyed powder；
(5) by alloyed powder and liquid mixing, and add organic bond and stir, be configured to metal powder slurry；
(6) again slurry is made spherical 3D printing metal dust by sponging granulator.
The preparation method of 3D printing metal dust the most according to claim 1, it is characterised in that: described metal simple-substance uses
Aluminum shot, shot copper and nickel shot, wherein the content of nickel is 10wt%, and the content of aluminum is 12 wt %, and surplus is copper.
3. the preparation method of 3D printing metal dust as claimed in claim 1, it is characterised in that: described liquid uses distilled water
Or deionized water, and the mass ratio of alloyed powder and liquid is (2.5 3): 1.
4. the preparation method of 3D printing metal dust as claimed in claim 1, it is characterised in that: described organic bond uses
Metal granulating agent, its addition is the 2 4% of alloyed powder quality.
5. the preparation method of 3D printing metal dust as claimed in claim 1, it is characterised in that: described sponging granulator uses
Centrifugal spraying granulator or press atomization comminutor.
6. the preparation method of 3D printing metal dust as claimed in claim 5, it is characterised in that: described centrifugal spraying granulator
Rotating speed be 5,000 8000 revs/min, the pressure of press atomization comminutor is 15 25kg/ cm 2。
7. the preparation method of 3D printing metal dust as claimed in claim 5, it is characterised in that: described sponging granulator is dried
The inlet temperature of air is 250 350 DEG C, outlet temperature is 100 150 DEG C；The flow of dry air is 100 200 Nm3
/h；Charging rate is 10 20 kg/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610863066.2A CN106166616A (en) | 2016-09-29 | 2016-09-29 | A kind of preparation method of 3D printing metal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610863066.2A CN106166616A (en) | 2016-09-29 | 2016-09-29 | A kind of preparation method of 3D printing metal dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106166616A true CN106166616A (en) | 2016-11-30 |
Family
ID=57377336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610863066.2A Pending CN106166616A (en) | 2016-09-29 | 2016-09-29 | A kind of preparation method of 3D printing metal dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106166616A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015271A (en) * | 2017-12-12 | 2018-05-11 | 成都育芽科技有限公司 | A kind of 3D printing high strength and modulus composite particulate material preparation method |
| CN109894609A (en) * | 2019-03-19 | 2019-06-18 | 柳州增程材料科技有限公司 | A kind of production technology of increasing material manufacturing material |
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| US20030183305A1 (en) * | 2000-10-06 | 2003-10-02 | Ryo Murakami | Process for producing, through strip casting, raw alloy for nanocomposite type permanent magnet |
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| CN104946915A (en) * | 2015-07-03 | 2015-09-30 | 东北大学 | Preparation method of fine-grained CuCr alloy |
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| US20030217788A1 (en) * | 2000-04-12 | 2003-11-27 | Akira Arai | Cooling roll, ribbon-shaped magnetic materials, magnetic powders and bonded magnets |
| US20030183305A1 (en) * | 2000-10-06 | 2003-10-02 | Ryo Murakami | Process for producing, through strip casting, raw alloy for nanocomposite type permanent magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015271A (en) * | 2017-12-12 | 2018-05-11 | 成都育芽科技有限公司 | A kind of 3D printing high strength and modulus composite particulate material preparation method |
| CN109894609A (en) * | 2019-03-19 | 2019-06-18 | 柳州增程材料科技有限公司 | A kind of production technology of increasing material manufacturing material |
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Application publication date: 20161130 |