CN109676145A - A kind of aerosolization spray disk of controllable metal liquid flowing speed - Google Patents
A kind of aerosolization spray disk of controllable metal liquid flowing speed Download PDFInfo
- Publication number
- CN109676145A CN109676145A CN201910120279.XA CN201910120279A CN109676145A CN 109676145 A CN109676145 A CN 109676145A CN 201910120279 A CN201910120279 A CN 201910120279A CN 109676145 A CN109676145 A CN 109676145A
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- Prior art keywords
- main burner
- auxiliary jet
- liquid flowing
- aerosolization
- flowing speed
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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.)
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Classifications
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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
-
- 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
-
- 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
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Nozzles (AREA)
Abstract
A kind of aerosolization spray disk of controllable metal liquid flowing speed, including auxiliary jet and main burner, to influence the swabbing pressure of main burner range of atomization, realize the regulation to metal liquid flowing speed using the negative pressure state of auxiliary jet regulation main burner range of atomization.The invention has the benefit that the spray disk uses two kinds of nozzle arrangements of major-minor, real-time monitoring can be carried out to metal liquid flowing speed in atomization process, and the supersonic speed of main burner exit gas is realized using Laval configuration, the stability and nebulization efficiency of atomization process are improved, the uniformity of powder diameter distribution and the pick-up rate of product fine powder are promoted.
Description
Technical field
The present invention relates to the aerosolization Preparation equipments of powder metallurgical technology more particularly to metal 3D printing powder.
Background technique
In recent years, with the rise of the continuous development of advanced manufacturing industry and intelligence manufacture, metal 3D printing technique has been sent out
Transform into a kind of change method for each industrial department product design and research and development, product example use in Aeronautics and Astronautics,
The Disciplinary Frontiers such as medical instrument.In entire 3D printing technique development framework, the research and development of metal powder consumptive material are for entire body
The development of system plays the role of vital.Metal powder will directly influence 3D printing as raw material, the characteristic of powder
Can forming process be stablized, efficiently carry out, and the shape to formation of parts, dimensional accuracy, tissue and mechanical property generate
Decisive influence.Such as the Size Matching of metal powder, influence the suitability of printing technology；It improves the sphericity of particle, subtract
Few satellite ball ratio, it is ensured that the good mobility of powder improves printing technology stability；Reduction alloy powder oxygen content,
It is mingled with and hollow sphere ratio, it is possible to reduce the formation of printout organization internal defect.
Therefore, the master for preparing fine/submicron metal and having become the development of powder by atomization technology of high quality and low cost
Want direction.The basic principle of powder by atomization technology is that liquid metal is ground into droplet using high-speed flow and is finally frozen into
Powder, the core of aerosolization technology are control gas to the mechanism of metal liquid, make the kinetic energy of high-speed flow utmostly
The surface energy for being converted into metal powder.Small with powder size prepared by this gas atomization, sphericity is high, and oxygen content is low, flowing
Property it is good, and have the advantages such as ability for mass production, it is natural to become current production metal 3D printing high-performance metal powder
The mainstream technology at end, also therefore, as the core component for realizing energy conversion -- atomization spray disk becomes aerosolization technology naturally
The core of research.
In the atomization spray disk applied and reported at present, almost without being related to controlling metal liquid flowing speed
Novel atomized spray disk, and be to realize that atomization process is stable, promotes product to receive to the control of metal liquid flowing speed in atomization process
The important means of yield.
Therefore, the present invention has stronger application prospect, it may have the realistic background of urgent need.
Summary of the invention
The purpose of the present invention is to provide a kind of aerosolizations of controllable metal liquid flowing speed to spray disk, which uses major-minor
Two kinds of nozzle arrangements can carry out real-time monitoring to metal liquid flowing speed in atomization process, and realize main jet using Laval configuration
The supersonic speed of mouth exit gas, improves the stability and nebulization efficiency of atomization process, promoted the uniformity of powder diameter distribution with
And the pick-up rate of product fine powder.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of aerosolization spray disk of controllable metal liquid flowing speed, including auxiliary jet and main burner, are regulated and controled using auxiliary jet
The negative pressure state of main burner range of atomization realizes the tune to metal liquid flowing speed to influence the swabbing pressure of main burner range of atomization
Control；
The auxiliary jet includes auxiliary jet sealing cover and auxiliary jet main body, the auxiliary jet sealing cover and the auxiliary jet master
It is connected and sealed between body, surrounds auxiliary jet gas chamber between the auxiliary jet main body and the auxiliary jet sealing cover；In the secondary spray
First metal fluid course and auxiliary jet gas passage are set in mouth main body, and the first metal fluid course is for conveying molten metal
Stream, auxiliary jet gas passage is for being connected to auxiliary jet gas chamber and the second metal fluid course；
The main burner includes main burner shell, main burner upper lip and main burner lower lip, in Yu Suoshu main burner shell
The main burner upper lip and the main burner lower lip, the main burner upper lip, the main burner lower lip and the main jet are installed
Main burner gas chamber is surrounded between mouth shell；The main burner upper lip is connected with the auxiliary jet main body, and in the main burner upper lip
The second metal fluid course that upper setting is connected to the first metal fluid course with the auxiliary jet gas passage, it is described
Main burner lower lip channel for avoiding the second metal fluid course is set on main burner lower lip, and the main burner lower lip is logical
The internal diameter in road is greater than the outer diameter of the second metal fluid course, and main burner lower lip channel and the second metal liquid stream
Interchannel forms Laval configuration, and the Laval configuration is connected to the main burner gas chamber and main burner lower lip channel；
Correspondingly, the first metal fluid course inner sleeve connects ceramic conduit, avoid auxiliary jet main body because of high-temperature liquid metal
Stream damages；
Correspondingly, the auxiliary jet gas passage is provided with several, which is surround
The first metal fluid course setting；
Correspondingly, the auxiliary jet gas passage is arranged in parallel with the first metal fluid course, on the one hand convenient for pair
Molten metal stream carries out water conservancy diversion, and another aspect gas enters in the range of atomization of main burner, can abolish the vacuum state of range of atomization, reduces
Metal liquid stream returns spray phenomenon；
Correspondingly, the auxiliary jet gas passage is provided with the even number between 18-26, and each aperture be greater than 0mm and
Less than or equal to 2mm, it is easy to implement the regulation of dissimilar metals liquid flowing speed；
Correspondingly, the pressure limit of auxiliary jet gas chamber injection gas is 0.5MPa-2MPa, main burner gas chamber sprays gas
Pressure limit is 3.5MPa-6MPa, convenient for improving fine powder recovery rate；
Correspondingly, gasket is arranged between main burner upper lip and main burner shell, main burner upper lip and main jet are adjusted by gasket
Gap between mouth lower lip, to realize the adjustment of Laval configuration gap size；
Correspondingly, the second metal fluid course inner sleeve fills stainless steel protection set, avoid main burner upper lip because of high temperature gold
Belong to liquid stream to damage；
Correspondingly, the cone angle value range that symmetrical side is formed on the second metal fluid course outer diameter are as follows: 52 ° -60 °,
The angle value for the cone angle beta that symmetrical side is formed on main burner lower lip channel is (α -24) °, forms supersonic gas with this kind of angle
Stream；
Correspondingly, the Laval configuration includes contraction section, venturi and expansion segment, the indoor gas of main burner gas is through receiving
Contracting section passes through venturi after being compressed, then stretched section is released into main burner range of atomization, biggish air-flow is consequently formed, and formed
Ultrasonic nebulization jet nozzle；
Correspondingly, the gap at the venturi is 0.74mm-1.2mm, segment length 3mm-5mm is expanded.
The invention has the benefit that on the one hand, which uses two kinds of nozzle arrangements of major-minor, regulate and control to lead using auxiliary jet
The negative pressure state in nozzle atomization area realizes the regulation to metal liquid flowing speed to influence the swabbing pressure of main burner range of atomization；
On the other hand, Laval configuration is formed between main burner lower lip channel and the second metal fluid course, is realized using Laval configuration
The supersonic speed of main burner exit gas improves the stability and nebulization efficiency of atomization process, promotes the equal of powder diameter distribution
The pick-up rate of even property and product fine powder.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the spray disk of aerosolization described in one embodiment of the invention；
Fig. 2 is the granularity Detection report of the metal powder of existing aerosolization spray disk preparation；
Fig. 3 is the granularity Detection report using the metal powder of the spray disk preparation of aerosolization described in one embodiment of the invention
It accuses；
In figure:
1, auxiliary jet sealing cover；2, auxiliary jet main body；3, auxiliary jet gas chamber；4, the first metal fluid course；5, auxiliary jet
Gas passage；6, main burner shell；7, main burner upper lip；8, main burner lower lip；9, main burner gas chamber；10, the second metal liquid stream
Channel；11, contraction section；12, venturi；13, expansion segment.
Specific embodiment
As shown in Figure 1, in one embodiment of the invention, the aerosolization spray disk of controllable metal liquid flowing speed includes pair
Nozzle and main burner；
Auxiliary jet includes auxiliary jet sealing cover 1 and auxiliary jet main body 2, in the present embodiment, auxiliary jet sealing cover 1 and secondary spray
It is connected between mouth main body 2 by thread seal, auxiliary jet gas chamber 3, and secondary spray is surrounded between auxiliary jet main body 2 and auxiliary jet sealing cover 1
The pressure limit that mouth gas chamber 3 sprays gas is 0.5MPa-2MPa；In 4 He of the first metal fluid course is arranged in auxiliary jet main body 2
Several circulating directions are the same as the parallel auxiliary jet gas passage 5 of the first metal fluid course 4, in the present embodiment, auxiliary jet gas
Body channel 5 is provided with 22, and 22 auxiliary jet gas passages 5 are around the distribution setting of the first metal fluid course 4, and each pair is sprayed
5 aperture of mouth gas passage is greater than 0mm and is less than or equal to 2mm；
Main burner includes main burner shell 6, main burner upper lip 7 and main burner lower lip 8, is installed in main burner shell 6
Main burner upper lip 7 and main burner lower lip 8 surround main burner gas between main burner upper lip 7, main burner lower lip 8 and main burner shell 6
Room 9, and it is 3.5MPa-6MPa that main burner gas chamber 9, which sprays the pressure limit of gas,；Main burner upper lip 7 connects with auxiliary jet main body 2
Connect, and in be arranged on main burner upper lip 7 with the first metal fluid course 4 and auxiliary jet gas passage 5 are corresponding and be connected to the
Two metal fluid courses 10, on main burner lower lip 8 setting for avoiding the main burner lower lip channel of the second metal fluid course 10,
The internal diameter in main burner lower lip channel is greater than the outer diameter of the second metal fluid course 10, and two cone angles and β is consequently formed, wherein the
The cone angle value range that symmetrical side is formed on two metal fluid courses, 10 outer diameter are as follows: 52 ° -60 °, right on main burner lower lip channel
The angle value for the cone angle beta that side is formed is referred to as (α -24) °；
By foring Laval configuration, Laval configuration connection between main burner lower lip channel and the second metal fluid course 10
Main burner gas chamber 9 and main burner lower lip channel, Laval configuration include contraction section 11, venturi 12 and expansion segment 13, and larynx
Gap at road 12 is 0.74mm-1.2mm, 13 length 3mm-5mm of expansion segment.
Disk is sprayed in the aerosolization according to above-described embodiment, and following examples can be obtained:
Metal liquid stream passes sequentially through the first metal fluid course 4, the second metal fluid course 10 and main burner lower lip channel
Into main burner range of atomization, by adjusting the air pressure for entering main burner range of atomization from auxiliary jet gas passage 5, to influence to lead
The swabbing pressure in nozzle atomization area.Specifically, increasing defeated from auxiliary jet gas passage 5 when needing to reduce metal liquid flowing speed
Air pressure out reduces the suction force of main burner range of atomization so that increasing from the gas flow that auxiliary jet enters main burner range of atomization, from
And reduce metal liquid flowing speed；When needing to increase metal liquid flowing speed, reduces the air pressure exported from auxiliary jet gas passage 5, make
It obtains and is reduced from the gas flow that auxiliary jet enters main burner range of atomization, enhance the suction force of main burner range of atomization, to increase metal
Liquid flowing speed.
In order to more intuitively show the difference for locating atomization spray disk described in existing atomization spray disk and the present embodiment, carry out hereby
Following comparison:
Disk (can not carry out metal liquid stream flow control) is sprayed using existing aerosolization, the atomization for carrying out 316L stainless steel is real
It tests.Superheat of liquid steel is about 180 DEG C~250 DEG C, atomizing pressure 4.5MPa, furnace burdening 60kg, and completing nebulisation time is 4 points
15 seconds, molten steel blocking and dross does not occur in atomization process led to atomization process disruption.Prepared powder passes through 80 meshes
After mesh screen point, its granularity, median particle diameter D50 are tested using laser particle analyzer are as follows: 50 μm≤D50≤60 μm, granularity Detection report
Announcement is shown in Fig. 2.
Disk is sprayed using aerosolization described in the present embodiment, carries out the atomization test of 316L stainless steel.Superheat of liquid steel is about
It is 180 DEG C~250 DEG C, main burner atomizing pressure is 4.5MPa, and auxiliary jet atomizing pressure is 1.2MPa, furnace burdening 60kg, complete
It is 6 points of 10s at nebulisation time, atomization process is smoothly stablized, and does not occur molten steel blocking and dross and atomization process is caused to interrupt
Abnormal phenomenon, prepared powder test its granularity, median particle diameter D50 using laser particle analyzer after the screening of 80 mesh screens
Are as follows: 40 μm≤D50≤45 μm, Fig. 3 is shown in granularity Detection report.
Comparison diagram 2 and Fig. 3 are it can be found that not only using metal powder prepared by the spray disk of aerosolization described in the present embodiment
Fine size, and size distribution is more uniform.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that for clarity, those skilled in the art should incite somebody to action
As a whole, the technical solutions in the various embodiments may also be suitably combined for specification, and forming those skilled in the art can
With the other embodiments of understanding.
Claims (11)
1. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed, it is characterised in that: including auxiliary jet and main burner, the pair
Nozzle includes auxiliary jet sealing cover and auxiliary jet main body, the company of being sealed between the auxiliary jet sealing cover and the auxiliary jet main body
It connects, surrounds auxiliary jet gas chamber between the auxiliary jet main body and the auxiliary jet sealing cover；In is arranged in the auxiliary jet main body
One metal fluid course and auxiliary jet gas passage；
The main burner includes main burner shell, main burner upper lip and main burner lower lip, installation in Yu Suoshu main burner shell
The main burner upper lip and the main burner lower lip, outside the main burner upper lip, the main burner lower lip and the main burner
Main burner gas chamber is surrounded between shell；The main burner upper lip is connected with the auxiliary jet main body, and is set on the main burner upper lip
Set the second metal fluid course being connected to the first metal fluid course with the auxiliary jet gas passage, the main jet
Main burner lower lip channel for avoiding the second metal fluid course is set on mouth lower lip, main burner lower lip channel
Internal diameter is greater than the outer diameter of the second metal fluid course, and main burner lower lip channel and the second metal fluid course
Between form Laval configuration, the Laval configuration is connected to the main burner gas chamber and main burner lower lip channel.
2. disk is sprayed in the aerosolization of controllable metal liquid flowing speed according to claim 1 a kind of, it is characterised in that: described the
One metal fluid course inner sleeve connects ceramic conduit.
3. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: the pair
Orifice gas channel is provided with several, which sets around the first metal fluid course
It sets.
4. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: the pair
Orifice gas channel is arranged in parallel with the first metal fluid course.
5. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: the pair
Orifice gas channel is provided with the even number between 18-26, and each aperture is greater than 0mm and is less than or equal to 2mm.
6. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: auxiliary jet
The pressure limit that gas chamber sprays gas is 0.5MPa-2MPa, and the pressure limit that main burner gas chamber sprays gas is 3.5MPa-
6MPa。
7. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: main burner
Gasket is set between upper lip and main burner shell.
8. disk is sprayed in the aerosolization of controllable metal liquid flowing speed according to claim 1 a kind of, it is characterised in that: described the
Two metal fluid course inner sleeves fill stainless steel protection set.
9. disk is sprayed in the aerosolization of controllable metal liquid flowing speed according to claim 1 a kind of, it is characterised in that: described the
The cone angle value range that symmetrical side is formed on two metal fluid course outer diameters are as follows: 52 ° -60 °, on main burner lower lip channel
The angle value for the cone angle beta that symmetrical side is formed is (α -24) °.
10. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: described
Laval configuration includes contraction section, venturi and expansion segment.
11. disk is sprayed in a kind of aerosolization of controllable metal liquid flowing speed according to claim 1, it is characterised in that: described
Gap at venturi is 0.74mm-1.2mm, expands segment length 3mm-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120279.XA CN109676145A (en) | 2019-02-18 | 2019-02-18 | A kind of aerosolization spray disk of controllable metal liquid flowing speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120279.XA CN109676145A (en) | 2019-02-18 | 2019-02-18 | A kind of aerosolization spray disk of controllable metal liquid flowing speed |
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| Publication Number | Publication Date |
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| CN109676145A true CN109676145A (en) | 2019-04-26 |
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|---|---|---|---|
| CN201910120279.XA Pending CN109676145A (en) | 2019-02-18 | 2019-02-18 | A kind of aerosolization spray disk of controllable metal liquid flowing speed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111318714A (en) * | 2020-03-20 | 2020-06-23 | 无锡锋速钢丸有限公司 | Molten steel atomizing disc, atomizing pill making equipment and atomizing pill making method |
| CN112091226A (en) * | 2020-10-29 | 2020-12-18 | 佛山市中研非晶科技股份有限公司 | Stable form injection apparatus |
| CN112916859A (en) * | 2021-01-29 | 2021-06-08 | 上海电气集团股份有限公司 | Atomizing nozzle and gas atomization powder manufacturing equipment |
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Cited By (5)
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| CN111318714A (en) * | 2020-03-20 | 2020-06-23 | 无锡锋速钢丸有限公司 | Molten steel atomizing disc, atomizing pill making equipment and atomizing pill making method |
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Application publication date: 20190426 |