CN106903303A - A kind of high duty metal powder and its technique for being applied to Selective Laser Sintering - Google Patents
A kind of high duty metal powder and its technique for being applied to Selective Laser Sintering Download PDFInfo
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- CN106903303A CN106903303A CN201710152237.5A CN201710152237A CN106903303A CN 106903303 A CN106903303 A CN 106903303A CN 201710152237 A CN201710152237 A CN 201710152237A CN 106903303 A CN106903303 A CN 106903303A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 81
- 239000002184 metal Substances 0.000 title claims abstract description 81
- 239000000843 powder Substances 0.000 title claims abstract description 73
- 238000000110 selective laser sintering Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 20
- 239000000428 dust Substances 0.000 claims abstract description 23
- 241001494106 Stenotomus chrysops Species 0.000 claims abstract description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 18
- 239000011733 molybdenum Substances 0.000 claims abstract description 18
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 18
- 239000010955 niobium Substances 0.000 claims abstract description 18
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910001152 Bi alloy Inorganic materials 0.000 claims abstract description 17
- 229910052701 rubidium Inorganic materials 0.000 claims abstract description 17
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000010949 copper Substances 0.000 claims abstract description 14
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 14
- 239000011701 zinc Substances 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 238000000498 ball milling Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000013019 agitation Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005240 physical vapour deposition Methods 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000007790 solid phase Substances 0.000 abstract description 5
- 239000003870 refractory metal Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 14
- 238000005245 sintering Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 238000010146 3D printing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 238000000149 argon plasma sintering Methods 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- B22F1/0003—
-
- 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
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of high duty metal powder for being applied to Selective Laser Sintering, its composition by weight includes as follows：Molybdenum 15~18, niobium 10~12, lithium 1~3, rubidium 0~3, sn-bi alloy 0~3, prealloy SCuP powder 1~4, zinc 1~2, copper 1~2；The lithium, rubidium and sn-bi alloy are to use sedimentation to be prepared into the sub-micron-sized metal powder that average grain diameter is for 0.1~3 micron, and the molybdenum and niobium are metal dust that average grain diameter is 15~45 microns.The present invention receives refractory metal powder as framework metal, retains its solid phase core, and metal powder with low melting point coordinates copper, zinc and prealloy SCuP powder to overcome " nodularization " phenomenon as binding metal, so as to improve the hardness and surface quality of obtained 3 d part.
Description
Technical field
The present invention relates to metal material field, more particularly to a kind of high duty metal powder for being applied to laser sintering technology
And its technique.
Background technology
3D printing technique has turned into one of emerging technology for most paying close attention to of the whole world at present, this emerging mode of production and its
His Digitalisation Manufacture Mode promotes the realization of the third time industrial revolution together.3D printing technique is exactly in a computer by 3D
If CAD model is divided into dried layer, by 3D printing equipment in one plane according to 3D CAD layer patterns, by plastics, metal even
The materials such as biological tissue activity cell are sintered or sticked together, then stacking up in layer again.By each layer
The accumulation of different figures, eventually forms a three-dimensional body metal parts.3D printing technique is used as in whole 3D printing system
Forward position and most potential technology, are the important development directions of advanced manufacturing technology the most.With development in science and technology and popularization and application
Demand, metal function part is directly manufactured using rapid shaping becomes the main developing direction of rapid shaping.It is currently available
Mainly have in the quick molding method of directly manufacture metal function part：Including Selective Laser Sintering（Selective
Laser Sintering, SLS）, direct metal laser sintering technology (Direct Metal Laser Sintering
DMLS), selective laser melting process（Selective Laser Melting, SLM）, laser near-net-shape technology（Laser
Engineered Net Shaping, LENS）With electron beam selective melting technology（Electron Beam Selective
Melting, EBSM）.One of bottleneck that restriction 3D printing technique is developed rapidly is printed material, particularly metallic print
Material.
The whole process unit of Selective Laser Sintering is made up of powder cylinder and moulding cylinder, and work powder cylinder piston
(powder feeding piston) rise, by powder-laying roller by powder the uniform layer overlay on moulding cylinder piston (working piston), computer according to
The hierarchical model of prototype controls the two-dimensional scan track of laser beam, and selectively sintering solid dusty material is forming the one of part
Individual aspect.After completing one layer, working piston declines a thickness, and powdering system spreads new powder, and control laser beam scans sintering again
New layer.So move in circles, be layering, until 3 d part shaping.SLS techniques use semisolid liquid-phase sintering mechanism, powder
Body is completely melt, though the thermal stress of moulding material accumulation can be reduced to a certain extent, contains in drip molding and does not melt
Solid phase particles, directly result in that porosity is high, consistency is low, the defective workmanship such as poor tensile strength, surface roughness are high, in SLS half
In solid molding system, solid-liquid mixing system viscosity is generally higher, causes melted material poor fluidity, will appear from SLS rapid-result soon
The distinctive metallurgical imperfection of shape technique --- " nodularization " effect.Spherodization can not only increase drip molding surface roughness, can more lead
Power spreading device is caused to be difficult to sintering the layer surface follow-up bisque of uniform powdering, so as to hinder SLS processes smoothly to carry out.Due to sintering
Good part strength is relatively low, needs the 3 d part generally existing that can be only achieved intensity higher by post processing and manufacture strong
The problems such as spending relatively low not high, precision and poor surface quality.
The content of the invention
Present invention aim to address the deficiencies in the prior art, there is provided a kind of height for being applied to Selective Laser Sintering
Intensity metal powder, so as to effectively solve " nodularization " effect, is obtained the 3 d part that intensity is high, surface quality is good.
The technical solution adopted by the present invention is：A kind of high duty metal powder for being applied to Selective Laser Sintering,
Its composition by weight includes as follows：Molybdenum 15~18, niobium 10~12, lithium 1~3, rubidium 0~3, sn-bi alloy 0~3, prealloy
SCuP powder 1~4, zinc 1~2, copper 1~2；The lithium, rubidium and sn-bi alloy be use sedimentation be prepared into average grain diameter for
0.1~3 micron of sub-micron-sized metal powder, the molybdenum and niobium are metal dust that average grain diameter is 15~45 microns.
A kind of preparation technology of the high duty metal powder for being applied to Selective Laser Sintering, comprises the following steps：
（1）Sub-micron-sized metal powder of the average grain diameter 0.1~3 is prepared using physical vapor deposition or chemical vapor infiltration
Lithium, rubidium and sn-bi alloy；（2）The raw metal of molybdenum, niobium, copper and zinc is carried out melting, slag hitting respectively metallic slurry is obtained, to gold
The molten slurry of category carries out excusing from death atomization process, condensation and the metal dust that average grain diameter is 15~45 microns is obtained；（3）Will be obtained average
Particle diameter is mixed in the metal dust and prealloy SCuP powder that 0.1~3 sub-micron-sized metal powder, average grain diameter are 15~45 microns
Close, in the presence of dried medium argon gas, first carry out ball milling, then carry out mechanical agitation.
As a further improvement on the present invention, micro Ag and P is added in the prealloy SCuP powder.
As a further improvement on the present invention, step（3）In be filled with argon gas to vacuum pressure and reach 0.04~0.06MPa
Row continuous evaporation；Step（3）Middle Ball-milling Time is 60~70min, and rotating speed is 350~400r/min, and the mechanical agitation time is 30
~40min, stir speed (S.S.) is 120~180r/min.
The present invention use beneficial effect be：The present invention receives refractory metal powder as framework metal, retains it and consolidates
Phase core, metal powder with low melting point coordinates copper, zinc and prealloy SCuP powder to overcome " nodularization " phenomenon as binding metal, so that
Improve the hardness and surface quality of obtained 3 d part.
Specific embodiment
With reference to embodiment, the present invention is described further.
A kind of embodiment 1, high duty metal powder for being applied to Selective Laser Sintering, its composition by weight is included such as
Under：Molybdenum 15, niobium 10, lithium 1, rubidium 1, sn-bi alloy 1.5, prealloy SCuP powder 1, zinc 1, copper 2；The lithium, rubidium and tin
Bismuth alloy is to use sedimentation to be prepared into the sub-micron-sized metal powder that average grain diameter is for 0.1~3 micron, and the molybdenum and niobium are flat
Equal particle diameter is 15~45 microns of metal dust.Fine powder amount control is ensured 10% or so, and then overcomes " nodularization " phenomenon.
A kind of preparation technology of the high duty metal powder for being applied to Selective Laser Sintering, comprises the following steps：
（1）Sub-micron-sized metal powder of the average grain diameter 0.1~3 is prepared using physical vapor deposition or chemical vapor infiltration
Lithium, rubidium and sn-bi alloy；（2）The raw metal of molybdenum, niobium, copper and zinc is carried out melting, slag hitting respectively metallic slurry is obtained, to gold
The molten slurry of category carries out excusing from death atomization process, condensation and the metal dust that average grain diameter is 15~45 microns is obtained；（3）Will be obtained average
Particle diameter is mixed in the metal dust and prealloy SCuP powder that 0.1~3 sub-micron-sized metal powder, average grain diameter are 15~45 microns
Close, being filled with argon gas to vacuum pressure and reaching 0.04MPa carries out continuous evaporation, first carries out ball milling, and Ball-milling Time is 60min, rotating speed
It is 350r/min；Mechanical agitation is carried out again, and mixing time is 30min, and stir speed (S.S.) is 120r/min.
A kind of embodiment 2, high duty metal powder for being applied to Selective Laser Sintering, its composition by weight is included such as
Under：Molybdenum 18, niobium 12, lithium 1, rubidium 1, sn-bi alloy 1, prealloy SCuP powder 1, zinc 2, copper 2；The lithium, rubidium and tin bismuth
Alloy is to use sedimentation to be prepared into the sub-micron-sized metal powder that average grain diameter is for 0.1~3 micron, and the molybdenum and niobium are average
Particle diameter is 15~45 microns of metal dust, and micro Ag and P is added in the prealloy SCuP powder.Ensure fine powder amount control
10% or so, and then overcome " nodularization " phenomenon.
A kind of preparation technology of the high duty metal powder for being applied to Selective Laser Sintering, comprises the following steps：
（1）Sub-micron-sized metal powder of the average grain diameter 0.1~3 is prepared using physical vapor deposition or chemical vapor infiltration
Lithium, rubidium and sn-bi alloy；（2）The raw metal of molybdenum, niobium, copper and zinc is carried out melting, slag hitting respectively metallic slurry is obtained, to gold
The molten slurry of category carries out excusing from death atomization process, condensation and the metal dust that average grain diameter is 15~45 microns is obtained；（3）Will be obtained average
Particle diameter is mixed in the metal dust and prealloy SCuP powder that 0.1~3 sub-micron-sized metal powder, average grain diameter are 15~45 microns
Close, being filled with argon gas to vacuum pressure and reaching 0.06MPa carries out continuous evaporation, first carries out ball milling, and Ball-milling Time is 70min, rotating speed
It is 400r/min；Mechanical agitation is carried out again, and mixing time is 40min, and stir speed (S.S.) is 180r/min.
A kind of embodiment 3, high duty metal powder for being applied to Selective Laser Sintering, its composition by weight is included such as
Under：Molybdenum 17, niobium 11, lithium 1, sn-bi alloy 0.5, prealloy SCuP powder 2, zinc 2, copper 2；The lithium, rubidium and tin bismuth are closed
Gold is to use sedimentation to be prepared into the sub-micron-sized metal powder that average grain diameter is for 0.1~3 micron, and the molybdenum and niobium are average grain
Footpath is 15~45 microns of metal dust, and micro Ag and P is added in the prealloy SCuP powder.Ensure that fine powder amount control exists
10% or so, and then overcome " nodularization " phenomenon.
A kind of preparation technology of the high duty metal powder for being applied to Selective Laser Sintering, comprises the following steps：
（1）Sub-micron-sized metal powder of the average grain diameter 0.1~3 is prepared using physical vapor deposition or chemical vapor infiltration
Lithium, rubidium and sn-bi alloy；（2）The raw metal of molybdenum, niobium, copper and zinc is carried out melting, slag hitting respectively metallic slurry is obtained, to gold
The molten slurry of category carries out excusing from death atomization process, condensation and the metal dust that average grain diameter is 15~45 microns is obtained；（3）Will be obtained average
Particle diameter is mixed in the metal dust and prealloy SCuP powder that 0.1~3 sub-micron-sized metal powder, average grain diameter are 15~45 microns
Close, being filled with argon gas to vacuum pressure and reaching 0.05MPa carries out continuous evaporation, first carries out ball milling, and Ball-milling Time is 70min, rotating speed
It is 400r/min；Mechanical agitation is carried out again, and mixing time is 40min, and stir speed (S.S.) is 160r/min.
In order to overcome " nodularization " phenomenon, and the defective workmanship such as the sintering warpage that thereby results in, density is loose.The present invention is logical
Cross using the different multicomponent metal dust of fusing point and realized using pre-alloyed powder.Multicomponent metal dust system is by Gao Rong
Point metal molybdenum and niobium, low-melting-point metal lithium, rubidium and sn-bi alloy, wherein refractory metal powder retain it as framework metal
Solid phase core；Used as binding metal, fusing forms liquid phase to metal powder with low melting point, the liquid phase coating of generation, wetting and bonds solid
Phase metallic particles, sintering densification is realized with this.The cyrystal boundary segregation type tension-active element and prealloy of zinc and copper are added simultaneously
SCuP powder, further increases the ductility of sintering, improves wetability, so as to control the generation of spherical effect.
Found by the experiment of laser sintering powder, by adjusting process parameter, can change sintering pond shape and then
Decrease or even eliminate spherical effect.But the size of powder particle equally produces influence, experiment to show to work as fine powder on spherical effect
At 10% or so, spherical effect phenomenon is significantly suppressed for amount control.
Two kinds of auxiliary materials of a small amount of P, Ag are added in the sintering of prealloy SCuP powder, wherein Ag elements can be effective
Increase the ductility of sintering, P element can make surface oxidation preferentially generate phosphorus slag with P reactions so that sintering stage forms metal -- Au
Category interface, and then wettability is improved, suppress the generation of spherical effect.
Metal dust prepared by above-described embodiment is used for 3D printing, has good dispersion in nozzle spraying process, fills
Distribution wave metal dust conveying it is excellent the characteristics of.Always fully ensure that the metal dust contact area of joint is big in successively printing Guo,
Bond fastening.Due to the frequently integrated metal dust of the present invention, but framework metal is used as by refractory metal powder, protected
Stay its solid phase core；Used as binding metal, fusing forms liquid phase to metal powder with low melting point, the liquid phase coating of generation, wetting and viscous
Knot solid metallic particle.Therefore both possessed the advantage of sub-micron ion, but also with dispersiveness and the advantage of transporting.
Metal dust of the invention can be applied equally to direct metal laser sintering technology (Direct Metal
Laser Sintering DMLS), selective laser melting process（Selective Laser Melting, SLM）, improve three-dimensional
The hardness and surface quality of part.
Those skilled in the art, can also be it is to be understood that protection scheme of the invention is not limited only to the above embodiments
Various permutation and combination and conversion are carried out on the basis of above-described embodiment, on the premise of without prejudice to spirit of the invention, to the present invention
The various conversion for carrying out are all fallen within protection scope of the present invention.
Claims (4)
1. a kind of high duty metal powder for being applied to Selective Laser Sintering, its composition by weight includes as follows：
Molybdenum 15~18, niobium 10~12, lithium 1~3, rubidium 0~3, sn-bi alloy 0~3, prealloy SCuP powder 1~4, zinc 1
~2, copper 1~2；The lithium, rubidium and sn-bi alloy are to use sedimentation to be prepared into the sub-micron that average grain diameter is for 0.1~3 micron
Level metal dust, the molybdenum and niobium are metal dust that average grain diameter is 15~45 microns.
2. a kind of high strength powder for being applied to Selective Laser Sintering according to claim 1, it is characterized in that institute
State and add micro Ag and P in prealloy SCuP powder.
3. a kind of preparation for making the high duty metal powder for being applied to Selective Laser Sintering as claimed in claim 1
Technique, it is characterized in that comprising the following steps：
（1）Sub-micron-sized metal of the average grain diameter 0.1~3 is prepared using physical vapor deposition or chemical vapor infiltration
Powder lithium, rubidium and sn-bi alloy；
（2）The raw metal of molybdenum, niobium, copper and zinc is carried out melting, slag hitting respectively metallic slurry is obtained, metallic slurry is surpassed
Raw atomization process, condensation are obtained the metal dust that average grain diameter is 15~45 microns；
（3）By obtained average grain diameter in the metal powder that 0.1~3 sub-micron-sized metal powder, average grain diameter are 15~45 microns
End and the mixing of prealloy SCuP powder, in the presence of dried medium argon gas, first carry out ball milling, then carry out mechanical agitation.
4. the preparation work of a kind of high duty metal powder for being applied to Selective Laser Sintering according to claim 3
Skill, it is characterized in that step（3）In be filled with argon gas to vacuum pressure and reach 0.04~0.06MPa and carry out continuous evaporation；Step（3）In
Ball-milling Time is 60~70min, and rotating speed is 350~400r/min, and the mechanical agitation time is 30~40min, and stir speed (S.S.) is 120
~180r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710152237.5A CN106903303A (en) | 2017-03-15 | 2017-03-15 | A kind of high duty metal powder and its technique for being applied to Selective Laser Sintering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710152237.5A CN106903303A (en) | 2017-03-15 | 2017-03-15 | A kind of high duty metal powder and its technique for being applied to Selective Laser Sintering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108746596A (en) * | 2018-06-29 | 2018-11-06 | 北京梦之墨科技有限公司 | A kind of 3D printing metal material and preparation method thereof and application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785860A (en) * | 2014-01-22 | 2014-05-14 | 宁波广博纳米新材料股份有限公司 | Metal powder for 3D printer and preparing method thereof |
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Application publication date: 20170630 |