CN108555284A - A kind of post-processing approach of selective laser fusing spherical metal powder - Google Patents
A kind of post-processing approach of selective laser fusing spherical metal powder Download PDFInfo
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- CN108555284A CN108555284A CN201810666428.8A CN201810666428A CN108555284A CN 108555284 A CN108555284 A CN 108555284A CN 201810666428 A CN201810666428 A CN 201810666428A CN 108555284 A CN108555284 A CN 108555284A
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- spherical metal
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- 239000000843 powder Substances 0.000 title claims abstract description 108
- 239000002184 metal Substances 0.000 title claims abstract description 57
- 238000012805 post-processing Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 46
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 239000008187 granular material Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001953 recrystallisation Methods 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 9
- 238000010792 warming Methods 0.000 claims abstract description 9
- 239000010431 corundum Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000009690 centrifugal atomisation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000009689 gas atomisation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012387 aerosolization Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000009466 transformation Effects 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
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A kind of post-processing approach of selective laser fusing spherical metal powder, which is characterized in that include the following steps：1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 5 10 times of powder average particle size, is collectively disposed in closed metal container；2）It is continually fed into big flow cycle argon gas in container, forms air whirl, powder freely collides at random in container；3）Canister is placed in in heatable furnace chamber, make powder be warming up to metal recrystallization temperature 40 60%, 10 100min are kept；4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, obtains shaggy metal powder granulates；Reflectivity of the powder surface to laser is reduced, metal powder is improved to the absorption rate of laser, meets the application demand that SLM technical capabilities efficiently utilize.
Description
Technical field
The invention belongs to the preparing technical fields of nonferrous metal powder, and in particular to a kind of selective laser fusing metal ball
The post-processing approach of shape powder.
Background technology
It melts selective laser（Selective Laser Melting, abbreviation SLM）Technology is the metal of current most foreground
One of increases material manufacturing technology.Its operation principle be use laser beam successively to be scanned to alloy powder for heat source, the number of superposition forming
Word increasing material manufacturing method, the technology have using preset powdering, vibration mirror scanning mode, and spot diameter is small, laser power density
Height, powder is completely melt, sweep speed is fast, forming accuracy is high（Ten micron orders）The advantages that, it is suitable for small-medium size complex thin-wall
The net forming of component.SLM methods are higher for the performance requirement of powder using spherical metal powder as raw material, good except that need to have
Plasticity outside, it is necessary to it is high to meet high tiny powder diameter, narrower particle size distribution, spherical rate, good fluidity and apparent density
Deng requirement, generally use gas atomization or centrifugal atomization production.
But since the spherical metal powder of atomization production is all quickly to be solidified to be formed by drop, surface smoothness
It is higher.In laser beam flying powder process, since powder surface acts on the mirror-reflection of laser, metal powder is to laser
Absorption rate is very low.The reflectivity of common metal powder is up to 90% or more, when laser power is 105W/cm2When, it is effective to add
Thermal power is only 103W/cm2, this greatly reduces the ability utilization ratio of SLM technologies, localized heat when causing laser melting powder
It measures uneven, while also limiting application of the technology in terms of refractory metal processing.
Invention content
To overcome above-mentioned the deficiencies in the prior art, the purpose of the present invention is to provide a kind of selective laser fusing metal balls
The post-processing approach of shape powder is effectively carried by metal powder made from the aerosolization of this method batch processing or centrifugal atomization
High powder particle surface roughness, it is diffusing reflection mechanism to make powder surface specular reflections mechanism transformation, significantly reduces powder surface
To the reflectivity of laser, absorption rate of the metal powder to laser is improved, meets the application need that SLM technical capabilities efficiently utilize
It asks.
To achieve the above object, the technical solution adopted by the present invention is：A kind of selective laser fusing spherical metal powder
Post-processing approach, the spherical metal powder produced using gas atomization or centrifugal atomization is handled, including following step
Suddenly：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 5-10 times of powder average particle size, is collectively disposed at close
It closes in canister；
2）It is continually fed into big flow cycle argon gas in container, forms air whirl, powder freely collides at random in container；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 40-60% of metal recrystallization temperature, is protected
Hold 10-100min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates.
The multiangular ceramic particle can be the hard particles of corundum, quartz or diamond.
The big flow cycle argon flow amount is 200-1000L/min.
The beneficial effects of the present invention are：
1）The present invention is by the way that under big flow recyclegas eddy current effect, with powder surface high frequency time occurs for high-hardness ceramic particle
Collision improves powder surface roughness in the case where not changing powder entirety pattern, forms surface diffusing reflection, significantly reduces
Reflectivity of the powder to laser.
2）The present invention is conducive to surface and is formed by suitably being heated to powder, improving powder plasticity and reducing resistance of deformation
The coarse lines such as fold, hole point, while avoiding powder even broken because shock cracks, influence powder properties.
Description of the drawings
Fig. 1 is powder particle pattern and surface appearance before present invention processing.
Fig. 2 is powder particle pattern and surface appearance after present invention processing.
Specific implementation mode
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of post-processing approach of selective laser fusing spherical metal powder, to being produced using gas atomization or centrifugal atomization
Spherical metal powder handled, include the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 5 times of powder average particle size, is collectively disposed at closed
In canister；
2）Be continually fed into the cycle argon gas that flow is 200L/min in container, form air whirl, powder in container it is random from
By colliding；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 40% of metal recrystallization temperature, is kept
10min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates.
The multiangular ceramic particle is corundum in granules.
Embodiment 2
A kind of post-processing approach of selective laser fusing spherical metal powder, to being produced using gas atomization or centrifugal atomization
Spherical metal powder handled, include the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 7 times of powder average particle size, is collectively disposed at closed
In canister；
2）Be continually fed into the cycle argon gas that flow is 500L/min in container, form air whirl, powder in container it is random from
By colliding；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 50% of metal recrystallization temperature, is kept
55min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates.
The multiangular ceramic particle is quartz particles.
Embodiment 3
A kind of post-processing approach of selective laser fusing spherical metal powder, to being produced using gas atomization or centrifugal atomization
Spherical metal powder handled, include the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 10 times of powder average particle size, is collectively disposed at closed
In canister；
2）Be continually fed into the cycle argon gas that flow is 1000L/min in container, form air whirl, powder in container it is random from
By colliding；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 60% of metal recrystallization temperature, is kept
100min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates.
The multiangular ceramic particle is diamond particles.
Fig. 1 is spherical metal powder made from atomization, and powder as can be seen is in perfect spherical shape, and surface is smooth, the surface
Light reflectivity is high, and after the processing of embodiment 1, powder morphology and surface condition are as shown in Fig. 2, since intergranular shock is made
With surface deformation occurs for powder, and surface forms irregular form, the surface roughnesses such as hole, fold, corner angle and obviously increases, light
Reflectivity significantly reduces.But since surface deformation only occurs for powder, global shape is still subsphaeroidal, to powder flowbility without apparent
It influences.
Claims (6)
1. a kind of post-processing approach of selective laser fusing spherical metal powder, which is characterized in that include the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 5-10 times of powder average particle size, is collectively disposed at close
It closes in canister；
2）It is continually fed into big flow cycle argon gas in container, forms air whirl, powder freely collides at random in container；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 40-60% of metal recrystallization temperature, is protected
Hold 10-100min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates.
2. a kind of post-processing approach of selective laser fusing spherical metal powder according to claim 1, feature exist
In the multiangular ceramic particle includes the hard particles of corundum, quartz or diamond.
3. a kind of post-processing approach of selective laser fusing spherical metal powder according to claim 1, feature exist
In it is 200-1000L/min that the big flow, which recycles argon flow amount,.
4. a kind of post-processing approach of selective laser fusing spherical metal powder according to claim 1, feature exist
In including the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 5 times of powder average particle size, is collectively disposed at closed
In canister；
2）Be continually fed into the cycle argon gas that flow is 200L/min in container, form air whirl, powder in container it is random from
By colliding；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 40% of metal recrystallization temperature, is kept
10min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates；
The multiangular ceramic particle is corundum in granules.
5. a kind of post-processing approach of selective laser fusing spherical metal powder according to claim 1, feature exist
In including the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 7 times of powder average particle size, is collectively disposed at closed
In canister；
2）It is that 500L/min recycles argon gas that flow is continually fed into container, forms air whirl, and powder is random free in container
Collision；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 50% of metal recrystallization temperature, is kept
55min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates；
The multiangular ceramic particle is quartz particles.
6. a kind of post-processing approach of selective laser fusing spherical metal powder according to claim 1, feature exist
In including the following steps：
1）Spherical metal powder is mixed with the multiangular ceramic particle that size is 10 times of powder average particle size, is collectively disposed at closed
In canister；
2）It is that 1000L/min recycles argon gas that flow is continually fed into container, forms air whirl, and powder is random free in container
Collision；
3）Canister is placed in in heatable furnace chamber, making powder be warming up to the 60% of metal recrystallization temperature, is kept
100min；
4）After soaking time, heating system is closed, takes out powder, ceramic particle is removed using sieve method, it is thick to obtain surface
Rough metal powder granulates；
The multiangular ceramic particle is diamond particles.
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| CN201810666428.8A CN108555284B (en) | 2018-06-26 | 2018-06-26 | A kind of selective laser fusing post-processing approach of spherical metal powder |
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| CN108555284B CN108555284B (en) | 2019-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548866A (en) * | 2019-10-18 | 2019-12-10 | 广东工业大学 | Metal powder with rough surface, preparation method and application in SLS/SLM technology |
| CN110696539A (en) * | 2019-09-27 | 2020-01-17 | 武汉工控艺术制造有限公司 | Manufacturing method of bronze ware artwork based on 3D printing |
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| US4855102A (en) * | 1987-03-20 | 1989-08-08 | Hitachi, Ltd. | Sintering method |
| CN104226980A (en) * | 2014-07-29 | 2014-12-24 | 中国科学院重庆绿色智能技术研究院 | Method for enhancing laser energy absorption efficiency of metal powder material |
| CN106282721A (en) * | 2015-06-11 | 2017-01-04 | 优克材料科技股份有限公司 | Powder for molding and the manufacture method of pottery stereo object |
| CN106607585A (en) * | 2015-10-26 | 2017-05-03 | 同和电子科技有限公司 | Metal composite powder and method for producing same |
| CN106623953A (en) * | 2016-12-28 | 2017-05-10 | 东莞市精研粉体科技有限公司 | Preparing method of low-reflectivity spherical copper powder for 3D printing |
| US20170203512A1 (en) * | 2016-01-19 | 2017-07-20 | General Electric Company | Novel method for calibrating laser additive manufacturing process |
| CN107824785A (en) * | 2017-09-29 | 2018-03-23 | 中国航发北京航空材料研究院 | A kind of low laser reflectivity powder particle and preparation method |
-
2018
- 2018-06-26 CN CN201810666428.8A patent/CN108555284B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4855102A (en) * | 1987-03-20 | 1989-08-08 | Hitachi, Ltd. | Sintering method |
| CN104226980A (en) * | 2014-07-29 | 2014-12-24 | 中国科学院重庆绿色智能技术研究院 | Method for enhancing laser energy absorption efficiency of metal powder material |
| CN106282721A (en) * | 2015-06-11 | 2017-01-04 | 优克材料科技股份有限公司 | Powder for molding and the manufacture method of pottery stereo object |
| CN106607585A (en) * | 2015-10-26 | 2017-05-03 | 同和电子科技有限公司 | Metal composite powder and method for producing same |
| US20170203512A1 (en) * | 2016-01-19 | 2017-07-20 | General Electric Company | Novel method for calibrating laser additive manufacturing process |
| CN106623953A (en) * | 2016-12-28 | 2017-05-10 | 东莞市精研粉体科技有限公司 | Preparing method of low-reflectivity spherical copper powder for 3D printing |
| CN107824785A (en) * | 2017-09-29 | 2018-03-23 | 中国航发北京航空材料研究院 | A kind of low laser reflectivity powder particle and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110696539A (en) * | 2019-09-27 | 2020-01-17 | 武汉工控艺术制造有限公司 | Manufacturing method of bronze ware artwork based on 3D printing |
| CN110548866A (en) * | 2019-10-18 | 2019-12-10 | 广东工业大学 | Metal powder with rough surface, preparation method and application in SLS/SLM technology |
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| CN108555284B (en) | 2019-07-12 |
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Address after: 710018 No. 45, Fengcheng Second Road, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Patentee after: Xi'an Ouzhong Materials Technology Co.,Ltd. Country or region after: China Address before: No.45, Fengcheng 2nd Road, economic and Technological Development Zone, Xi'an, Shaanxi 710018 Patentee before: XI'AN SINO-EURO MATERIALS TECHNOLOGIES Co.,Ltd. Country or region before: China |