CN106735269A - The method for preparing the 3D printing Al alloy powder of excellent sintering character - Google Patents
The method for preparing the 3D printing Al alloy powder of excellent sintering character Download PDFInfo
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- CN106735269A CN106735269A CN201611170888.9A CN201611170888A CN106735269A CN 106735269 A CN106735269 A CN 106735269A CN 201611170888 A CN201611170888 A CN 201611170888A CN 106735269 A CN106735269 A CN 106735269A
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- printing
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- 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
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- 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
- B22F2009/0824—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 with a specific atomising fluid
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- 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
- B22F2009/0848—Melting process before atomisation
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Abstract
The invention discloses a kind of method of the 3D printing Al alloy powder for preparing excellent sintering character; raw material of aluminum alloy is vacuumized and aluminium alloy liquid is smelted under the protection of pressure-fired nitrogen; and keep the degree of superheat of 250~300 DEG C of aluminium alloy liquid acquisition in melting and insulating process; it is atomization gas to employ nitrogen as; aerosolization is carried out to the aluminium alloy liquid after melting, 3D printing Al alloy powder is obtained.The present invention provides a kind of method with excellent sintering character, the preparation 3D printing Al alloy powder that step is simple, operating process is short.
Description
Technical field
The present invention relates to 3D printing technique field, it is related to a kind of preparation method of 3D printing Al alloy powder, more particularly to
A kind of method of the 3D printing Al alloy powder for preparing excellent sintering character.
Background technology
3D printing (3DP) is one kind of rapid shaping technique, and it is a kind of based on mathematical model file, with powder
Shape metal or plastics etc. can jointing material, come the technology of constructed object by way of successively printing.3D printing technique by
Step grows up, and as it is continued to develop, the standard of traditional manufacture is also stepped up, for aerospace field,
Lightweight, high usage have progressively been referred to as standard of its manufacture parts, and wherein it is used it is most be exactly aluminium alloy.Aluminium
Alloy is used to manufacture parts, and its production cost is much lower compared to other metal materials, and aluminium element content is rich in the earth's crust
Richness, even more " renewable resource ", therefore aerospace field endures people's concern to the fullest extent.
It is aluminium alloy that most materials are used in aerospace field, for the aluminium alloy meeting reflection laser for printing, is caused
Many print defects.
The content of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, there is provided one kind has excellent agglutinating property
The method of the preparation 3D printing Al alloy powder that energy, step are simple, operating process is short.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of method of the 3D printing Al alloy powder for preparing excellent sintering character, raw material of aluminum alloy is vacuumized and micro-
Aluminium alloy liquid is smelted under positive nitrogen protection, and keeps 250~300 DEG C of aluminium alloy liquid acquisition in melting and insulating process
The degree of superheat, it is atomization gas to employ nitrogen as, and aerosolization is carried out to the aluminium alloy liquid after melting, obtains 3D printing and is closed with aluminium
Bronze.
The method of the described 3D printing Al alloy powder for preparing excellent sintering character, preferably includes following steps：
A, the melting mechanism that raw material of aluminum alloy is added atomization plant, to the atomising mechanism in atomization plant and melting machine
Structure is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at slight positive pressure state；Slight positive pressure state finger pressure is omited by force
The state of superatmospheric；
C, the holding furnace in melting mechanism is heated up, after reaching assigned temperature, opens the smelting furnace power supply in melting mechanism,
It is heated, after the holding furnace and smelting furnace in melting mechanism reach reaches smelting temperature, 30min~60min is incubated, makes it
Obtain 200~300 DEG C of the degree of superheat；
D, to employ nitrogen as be atomization gas, and it is 2-4Mpa to control atomization pressure, and the aluminium alloy liquid after melting is carried out
Aerosolization, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collects spherical or spherical particle and is processed
Obtain 3D printing Al alloy powder.
The method of the described 3D printing Al alloy powder for preparing excellent sintering character, the raw material of aluminum alloy is used
AlSi10Mg。
Easily there is the problem of product defects using aluminium alloy printing for prior art, it is aluminium alloy material to study carefully its main cause
The Si crystal grain of Al-Si is excessive in material, causes the insufficient caused of laser absorption.The present invention is by 200-300 DEG C of melt overheat, shadow
The growth of aluminium alloy is rung, reduces the size of its primary silicon, the effect of refinement is reached, so as to more be filled during 3D printing is carried out
The absorption laser for dividing, sintering character gets a promotion.The degree of superheat scope of present invention selection can effectively reduce Si crystallite dimensions, and
And can cause that last product has good sintering character, is particularly suited for SLS precinct laser sintering technologies.It is of the invention easy
Operate, step is simple, effect is obvious, and 3D printing Al alloy powder sintering character is improve well.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now describe in detail of the invention
Specific embodiment.
A kind of method of the 3D printing Al alloy powder for preparing excellent sintering character, raw material of aluminum alloy is vacuumized and micro-
Aluminium alloy liquid is smelted under positive nitrogen protection, and keeps 250~300 DEG C of aluminium alloy liquid acquisition in melting and insulating process
The degree of superheat, it is atomization gas to employ nitrogen as, and aerosolization is carried out to the aluminium alloy liquid after melting, obtains 3D printing and is closed with aluminium
Bronze.
The method of the described 3D printing Al alloy powder for preparing excellent sintering character, comprises the following steps：
A, the melting mechanism that raw material of aluminum alloy is added atomization plant, to the atomising mechanism in atomization plant and melting machine
Structure is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at pressure-fired (pressure is slightly above atmospheric pressure) state；
C, the holding furnace in melting mechanism is heated up, after reaching assigned temperature, opens the smelting furnace power supply in melting mechanism,
It is heated, after the holding furnace and smelting furnace in melting mechanism reach reaches smelting temperature, 30min~60min is incubated, makes it
Obtain 200~300 DEG C of the degree of superheat；
D, to employ nitrogen as be atomization gas, and it is 2-4Mpa to control atomization pressure, and the aluminium alloy liquid after melting is carried out
Aerosolization, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collects spherical or spherical particle and is processed
Obtain 3D printing Al alloy powder.
The method of the described 3D printing Al alloy powder for preparing excellent sintering character, the raw material of aluminum alloy is used
AlSi10Mg。
The present invention is described in detail below by way of specific embodiment：
Embodiment 1, prepare excellent sintering character 3D printing Al alloy powder method, comprise the following steps：
A, by raw material of aluminum alloy AlSi10Mg adds the melting mechanism of atomization plant, to the atomising mechanism in atomization plant
And melting mechanism is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at pressure-fired (pressure is slightly above atmospheric pressure) state；
C, by melting mechanism holding furnace heat up, control its power in 70kw, after reaching 800 DEG C of assigned temperature, open
Smelting furnace power supply in melting mechanism, heats it, controls its power between 70kw, when the holding furnace in melting mechanism and molten
Furnace is incubated 30min up to after reaching 800 DEG C of smelting temperature, the degree of superheat for making it obtain 200 DEG C；
D, to employ nitrogen as be atomization gas, and it is 2Mpa to control atomization pressure, and gas is carried out to the aluminium alloy liquid after melting
Atomization, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collects spherical or spherical particle and process
To 3D printing Al alloy powder.The particle diameter of the Al alloy powder being made is 15-53 μm.
The Al alloy powder produced using the present embodiment, using SLS precinct laser sintering techniques, is carried out tensile test bar and beaten
Print, printing is finished removes part, is processed, and determines the power of sample at ambient temperature according to GB/T 228-2010 standards
Learning performance is：Tensile strength 317Mpa, elongation percentage 12.7%.
Embodiment 2, prepare excellent sintering character 3D printing Al alloy powder method, comprise the following steps：
A, by raw material of aluminum alloy AlSi10Mg adds the melting mechanism of atomization plant, and atomising mechanism and melting mechanism are entered
Row is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at pressure-fired (pressure is slightly above atmospheric pressure) state；
C, by melting mechanism holding furnace heat up, control its power in 80kw, after reaching 800 DEG C of assigned temperature, open
Smelting furnace power supply in melting mechanism, heats it, controls its power between 80kw, when the holding furnace in melting mechanism and molten
Furnace is incubated 50min up to after reaching 800 DEG C of smelting temperature, the degree of superheat for making it obtain 250 DEG C；
D, to employ nitrogen as be atomization gas, and it is 3Mpa to control atomization pressure, and gas is carried out to the aluminium alloy liquid after melting
Atomization, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collects spherical or spherical particle and process
To 3D printing Al alloy powder.The particle diameter of the Al alloy powder being made is 20-55 μm.
The Al alloy powder produced using this example, using SLS precinct laser sintering techniques, carries out tensile test bar printing,
Printing is finished removes part, is processed, and determines the mechanical property of sample at ambient temperature according to GB/T 228-2010 standards
Can be：Tensile strength 338Mpa, elongation percentage 12.9%.
Embodiment 3, prepare excellent sintering character 3D printing Al alloy powder method, comprise the following steps：
A, by raw material of aluminum alloy AlSi10Mg adds the melting mechanism of atomization plant, and atomising mechanism and melting mechanism are entered
Row is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at pressure-fired (pressure is slightly above atmospheric pressure) state；
C, by melting mechanism holding furnace heat up, control its power in 90kw, after reaching assigned temperature, open melting machine
Smelting furnace power supply in structure, heats it, controls its power between 90kw, when the holding furnace and smelting furnace in melting mechanism reach
After reaching smelting temperature, 60min is incubated, the degree of superheat for making it obtain 300 DEG C；
D, to employ nitrogen as be atomization gas, and it is 4Mpa to control atomization pressure, and gas is carried out to the aluminium alloy liquid after melting
Atomization, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collects spherical or spherical particle and process
To 3D printing Al alloy powder.The particle diameter of the Al alloy powder being made is 15-50 μm.
The Al alloy powder produced using the present embodiment, using SLS precinct laser sintering techniques, is carried out tensile test bar and beaten
Print, beats to finish and removes part, is processed, and determines the mechanics of sample at ambient temperature according to GB/T 228-2010 standards
Performance is：Tensile strength 364Mpa, elongation percentage 13.2%.
The Al alloy powder of prior art carries out tensile test bar printing, and tensile strength is 290Mpa or so, elongation percentage after testing
It is 12%.
As can be seen from the above embodiments：The Al alloy powder for obtaining compared to existing technology, tensile strength increases 10-25%,
Elongation percentage increased 5.8-10%.
Claims (3)
1. a kind of method of the 3D printing Al alloy powder for preparing excellent sintering character, it is characterised in that by raw material of aluminum alloy
Vacuumize and aluminium alloy liquid is smelted under the protection of pressure-fired nitrogen, and keep aluminium alloy liquid acquisition in melting and insulating process
250~300 DEG C of the degree of superheat, it is atomization gas to employ nitrogen as, and aerosolization is carried out to the aluminium alloy liquid after melting, obtains 3D
Printing Al alloy powder.
2. the method for the 3D printing Al alloy powder for preparing excellent sintering character according to claim 1, it is characterised in that
Comprise the following steps：
A, the melting mechanism that raw material of aluminum alloy is added atomization plant, enter to the atomising mechanism in atomization plant and melting mechanism
Row is vacuumized, it is ensured that it is in vacuum state；
B, to nitrogen is poured in melting mechanism, be at slight positive pressure state；
C, the holding furnace in melting mechanism is heated up, after reaching assigned temperature, open the smelting furnace power supply in melting mechanism, make it
Heating, after the holding furnace and smelting furnace in melting mechanism reach reaches smelting temperature, is incubated 30min~60min, obtains it
200~300 DEG C of the degree of superheat；
D, to employ nitrogen as be atomization gas, and it is 2-4Mpa to control atomization pressure, and aerosol is carried out to the aluminium alloy liquid after melting
Change, liquid crushing is cooled to the spherical or spherical particle of aluminium alloy, collect spherical or spherical particle and processed
3D printing Al alloy powder.
3. the method for the 3D printing Al alloy powder for preparing excellent sintering character according to claim 1, it is characterised in that
The raw material of aluminum alloy uses AlSi10Mg。
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Cited By (3)
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|---|---|---|---|---|
| CN107649676A (en) * | 2017-09-06 | 2018-02-02 | 王明江 | A kind of 3D printing aluminium alloy powder body material |
| CN107716918A (en) * | 2017-09-21 | 2018-02-23 | 北京宝航新材料有限公司 | A kind of AlSi10Mg dusty materials and preparation method thereof and its application |
| CN109277579A (en) * | 2018-11-09 | 2019-01-29 | 安徽中体新材料科技有限公司 | A kind of low cost 3D printing Al alloy powder aerosolization preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107649676A (en) * | 2017-09-06 | 2018-02-02 | 王明江 | A kind of 3D printing aluminium alloy powder body material |
| CN107716918A (en) * | 2017-09-21 | 2018-02-23 | 北京宝航新材料有限公司 | A kind of AlSi10Mg dusty materials and preparation method thereof and its application |
| CN109277579A (en) * | 2018-11-09 | 2019-01-29 | 安徽中体新材料科技有限公司 | A kind of low cost 3D printing Al alloy powder aerosolization preparation method |
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