CN109249032A - Powder by atomization catheter - Google Patents
Powder by atomization catheter Download PDFInfo
- Publication number
- CN109249032A CN109249032A CN201811409619.2A CN201811409619A CN109249032A CN 109249032 A CN109249032 A CN 109249032A CN 201811409619 A CN201811409619 A CN 201811409619A CN 109249032 A CN109249032 A CN 109249032A
- Authority
- CN
- China
- Prior art keywords
- tube body
- powder
- groove
- nozzle
- catheter
- Prior art date
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—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
- 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
- B22F2009/0892—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 casting nozzle; controlling metal stream in or after the casting nozzle
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a kind of powder by atomization catheters, it includes tube body, there is groove on the outer peripheral surface of the tube body, the groove is recessed inwardly along the radial direction of the tube body, the tube body is used for across nozzle, and the tube body passes through between the groove and the nozzle with gap.Powder by atomization catheter of the invention, by groove gap between tube body and nozzle is isolated, greatly reduces thermal loss of the melt when passing through tube body, ensure that melt superheat degree, the blockage problem of powder by atomization catheter is efficiently solved, and improves the quality and production efficiency of fine powder.
Description
Technical field
The present invention relates to a kind of powder by atomization technical field, in particular to a kind of powder by atomization catheter.
Background technique
Increases material manufacturing technology is known as the third time industrial revolution, and wherein metal increasing material manufacturing is that increases material manufacturing technology realizes work
One of the important channel of industryization application, and the metal powder material as raw material is always technology development key place.Increasing material manufacturing
Required metal powder should have the features such as sphericity is high, and powder diameter is small, good fluidity and chemical component with high purity.This
High requirement just is proposed with required metal powder Preparation equipment to increasing material manufacturing.
Currently, the main technological route of preparation increasing material manufacturing metal powder raw material is vacuum aerosolization mode, vacuum gas
Atomization is that metal bath liquid stream is broken for tiny drop using high velocity inert gas, forms metal powder after droplet solidification.
During aerosolization, in addition to aerosolization nozzle, metal bath catheter plays key effect, directly affects production efficiency and powder
Material quality.The metal bath catheter of current gas-atomized powder has the disadvantage that
As described in patent publication No. is CN203610671U, in order to pursue high fine powder recovery rate, the flow of metal bath is got over
Small fine powder recovery rate theory is higher, but too low flow of molten metal will lead to solidification of metal melt plugging, and melt is easily being led
Pipeline blockage occurs for solidification at flow tube, influences the process of powder processed.
As described in patent publication No. is CN107999312A, in close coupling atomizer, the outlet end of catheter and high speed
The atomization gas of flowing directly contacts, and can reduce rapidly the temperature of drain pipe outer wall, be transmitted to meeting on melt so that melt solidify,
Cause drain blockage.
As described in patent publication No. is CN2587553Y, there are assembly relations for catheter housing and catheter, increase device
Complexity and manufacturing cost；When metal bath is exported from catheter to flow out, can be broken under the gas effect of high flow rate
Droplet, some drops may be sticked in outside the diversion pipe contacted with catheter and be put on, and even be led to influence atomizing effect
Flow tube housing is scrapped, and manufacturing cost is increased.
Under prior art technology, very air-atomized catheter is primarily present following deficiency:
In order to pursue higher fine powder recovery rate, it is common practice to reduce the internal diameter of catheter and increase atomization gas
Speed, relative to the speed for improving atomization gas, the internal diameter for reducing catheter is easier to realize.But metal is led thinner
When flowing in liquid pipe, it is easy to solidification occur and cause drain blockage.After drain blockage, all going back in crucible
The metal bath not flowed out can all be used as waste disposal.
According to metallurgy principle, aerosolization prepares metal powder and needs to have certain degree of superheat with the melt of gas effect,
Melt viscosity is lower to be more conducive to broken atomization.In catheter in flow process, temperature can flow melt in catheter
It moves the lengthening of distance and reduces.Melt superheat degree is too small not only to will affect the quality and powder diameter while may for generating powder
Plugging.
When metal bath is exported from catheter to flow out, it can be broken into droplet under the gas effect of high flow rate, some
Drop may be sticked in outside the diversion pipe contacted with catheter and be put on, to influence atomizing effect even diversion pipe housing report
It is useless, increase manufacturing cost.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome existing catheter to be easy to happen solidification, melt superheat degree is not
Enough, the defects of causing drain blockage, provides a kind of powder by atomization catheter.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of powder by atomization catheter, it is characterized in that comprising tube body has on the outer peripheral surface of the tube body recessed
Slot, the groove are recessed inwardly along the radial direction of the tube body, and the tube body is used for across nozzle, and the tube body
By having gap between the groove and the nozzle.
In the present solution, form using the above structure, is isolated gap between tube body and nozzle by groove, to pipe
Intrinsic melt plays good heat preservation, heat-blocking action, greatly reduces thermal loss of the melt when passing through tube body, protects
Melt superheat degree has been demonstrate,proved, so that melt will not generate solidification, has efficiently solved the blockage problem of powder by atomization catheter.Meanwhile
Failure rate of tube body during vacuum gas-atomized powder is reduced, the quality and production efficiency of fine powder are improved.
Preferably, the bottom of the tube body has chamfering, the chamfering is exposed to the lower surface of the nozzle, and described
It is in the same plane between the outer surface of chamfering and the lower surface of the nozzle.
In the present solution, form using the above structure, by stretch out nozzle lower surface catheter chamfering for bearing
The flowing of high-speed low temperature gas can effectively prevent melt and splash on nozzle so that melt will not stick on nozzle and
Lead to scrapping for nozzle.Meanwhile tube body is also convenient for by chamfering and is inserted into nozzle.
Preferably, the angle between the outer surface of the chamfering and the radial direction of the tube body is 45-75 degree.
Preferably, the outer peripheral surface of the tube body is equipped with positioning region, the positioning region is located at the top of the groove, institute
It states positioning region to extend outwardly protrusion along the radial direction of the tube body, the bottom surface of the positioning region is for being resisted against the nozzle
Top.
In the present solution, positioning action, realization powder by atomization catheter and spray are played in form, positioning region using the above structure
Accurate installation between mouth.
Preferably, in the same plane between the bottom surface of the positioning region and the upper side of the groove.
In the present solution, form, production positioning region easy to process using the above structure, and effectively reduce tube body and spray
Contact area between mouth avoids the heat loss of melt.
Preferably, the bottom of the tube body has contact portion, the contact site is described to connect in the lower section of the groove
Contact portion extends protrusion along the radial direction of the tube body, and the bottom of the contact portion has annular groove, the annular groove
Axial direction along the tube body is recessed upwards.
In the present solution, form, annular groove have heat-blocking action using the above structure, the heat for avoiding melt dissipates
It loses, ensure that the degree of superheat of melt, the bottom for effectively preventing tube body generates solidification phenomenon.
Preferably, the groove depth of the groove is 0.5-1mm, the groove width of the annular groove is 0.4-0.8mm.
Preferably, the tube body is made of integrated molding.
In the present solution, form using the above structure, the structure of tube body is by integrated design, convenient for replacement in time,
Reduce manufacturing cost.
Preferably, the distance that the tube body stretches out the nozzle lower surface is 3-5mm.
Preferably, the material of the tube body is ceramic material.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
Powder by atomization catheter of the invention is isolated gap between tube body and nozzle by groove, is substantially reduced
Thermal loss of the melt when passing through tube body, ensure that melt superheat degree, efficiently solve the stifled of powder by atomization catheter
Plug problem, and improve the quality and production efficiency of fine powder.
Detailed description of the invention
Fig. 1 is the use state diagram of the powder by atomization catheter of the embodiment of the present invention.
Fig. 2 is schematic cross-sectional view of the Fig. 1 along the direction A-A.
Fig. 3 is the schematic diagram of internal structure of the powder by atomization catheter of the embodiment of the present invention.
Fig. 4 is the powder by atomization catheter of the embodiment of the present invention and the relation schematic diagram of existing catheter.
Description of symbols:
Powder by atomization catheter 10
Tube body 1
Groove 11
Chamfering 12
Positioning region 13
Contact portion 14
Annular groove 15
Nozzle 20
Angle α
Specific embodiment
Illustrate below by the mode of embodiment and completely the present invention in conjunction with attached drawing to become apparent from, but therefore not incite somebody to action this
It invents among the scope of embodiments being limited in.
As shown in Figure 1, Figure 2 and Figure 3, the powder by atomization catheter 10 of the embodiment of the present invention includes tube body 1, tube body 1
Outer peripheral surface on there is groove 11, groove 11 is recessed inwardly along the radial direction of tube body 1, and tube body 1 is used for across nozzle 20,
And tube body 1 passes through between groove 11 and nozzle 20 with gap.Make gap between tube body 1 and nozzle 20 by groove 11
Isolation, tube body 1, at hollow structure, play good guarantor to the melt in tube body 1 in the Position Design for bearing cryogenic gas
Temperature, heat-blocking action greatly reduce thermal loss of melt when through tube body 1, ensure that melt superheat degree, so that melt
Solidification will not be generated, the blockage problem of powder by atomization catheter 10 is efficiently solved.Meanwhile tube body 1 is reduced in vacuum gas
Failure rate during powder by atomization improves the quality and production efficiency of fine powder.
The material of tube body 1 can be ceramic material.The ceramic material such as aluminium oxide (Al2O3), magnesia (MgO), stone
Black (C), zirconium oxide (ZrO2) and boron nitride (BN) etc., powder by atomization catheter 10 in use, can fill in groove 11
Full atomization gas is simultaneously formed with gas film, the thermal coefficient of the gas film 3-4 order of magnitude small compared with the thermal coefficient of ceramic material,
So as to effectively hinder scattering and disappearing for melt heat, play the role of insulation.
Wherein, a length of 88-94mm of the pipe shaft of tube body 1, the groove depth of groove 11 can be 0.5-1mm so that tube body 1 with
At least with the gap of 0.5-1mm between nozzle 20.
The bottom of tube body 1 can have chamfering 12, and chamfering 12 is exposed to the lower surface of nozzle 20, and the appearance of chamfering 12
It is in the same plane between face and the lower surface of nozzle 20.Nozzle 20 is stretched out in the bottom of tube body 1, and the bottom of nozzle 20 has
Sloping portion, chamfering 12 are stretched out the sloping portion, are seamlessly transitted between the outer surface of chamfering 12 and the bottom surface of the sloping portion, and
It is in the same plane between the outer surface of chamfering 12 and the bottom surface of the sloping portion.Melt high speed ejection in tube body 1 is simultaneously
It is directly contacted with external low-temperature atomizing gas, is used to bear the flowing of high-speed low temperature gas by chamfering 12, can effectively keep away
Exempt from melt to splash on nozzle 20, so that melt will not stick on nozzle 20 and lead to scrapping for nozzle 20.Meanwhile passing through
Chamfering 12 is also convenient for tube body 1 and is inserted into nozzle 20.Preferably, the bottom of tube body 1 be inserted into nozzle 20 and with nozzle 20 it
Between have gap, avoid melt and do not contact solidification with nozzle 20.Between the outer surface of chamfering 12 and the radial direction of tube body 1
Angle α be 45-75 degree.
Tube body 1 can be made of being integrally formed.The structure of tube body 1 is by integrated design, convenient for replacing in time,
Manufacturing cost can be reduced.Preferably, the distance that tube body 1 stretches out 20 lower surface of nozzle is 3-5mm, and melt is avoided to stick in nozzle
Nozzle 20 is caused to fail on 20.
Positioning region 13 can be equipped on the outer peripheral surface of tube body 1, positioning region 13 is located at the top of groove 11,13 edge of positioning region
The radial direction of tube body 1 extends outwardly protrusion, and the bottom surface of positioning region 13 is used to be resisted against the top of nozzle 20.Tube body 1 from
Nozzle 20 is inserted under, positioning action is played in positioning region 13, the top of nozzle 20 is resisted against by positioning region 13, so that falling
It is in the same plane between the outer surface at angle 12 and the lower surface of nozzle 20, realize powder by atomization catheter 10 and nozzle 20 it
Between accurate installation.
It is in the same plane between the bottom surface of positioning region 13 and the upper side of groove 11.The upper side of groove 11 refers to groove
Far from the one side of chamfering 12 in 11 inner wall, the downside of groove 11 refers in the inner wall of groove 11 close to the one of chamfering 12
Side passes through in the same plane between the bottom surface of positioning region 13 and the upper side of groove 11, production positioning region easy to process
13, and the contact area between tube body 1 and nozzle 20 is effectively reduced, avoid the heat loss of melt.Wherein, positioning region
The width of 13 bottom surface can be 8-14mm, formed step-like between positioning region 13 and groove 11 and be used to position, realize positioning
Portion 13 and nozzle 20 are cooperated by step.
The bottom of tube body 1 can have contact portion 14, and contact portion 14 is located at the lower section of groove 11, and contact portion 14 is along pipe sheet
The radial direction of body 1 extends protrusion, and the bottom of contact portion 14 has annular groove 15, axial direction of the annular groove 15 along tube body 1
Direction is recessed upwards.Tube body 1 is inserted into nozzle 20 from top to bottom, and chamfering 12 is located at the side of the bottom of contact portion 14, Guan Ben
There are abutting contacts to the inner wall of nozzle 20, the heat of melt to pass through contact portion for contact portion 14 during use for body 1
14 can conduct it is lost.Make contact portion 14 that there is a hollow structure by annular groove 15, annular groove 15 has heat-insulated work
With avoiding the heat loss of melt, ensure that the degree of superheat of melt, effectively preventing the bottom of tube body 1, to generate solidification existing
As.
Wherein, the groove width of annular groove 15 is 0.4-0.8mm, and the groove depth of annular groove 15 is 3-5mm, and certainly, annular is recessed
The groove depth of slot 15 can be designed according to the height of contact portion 14.
Powder by atomization use is carried out with the powder by atomization catheter 10 of the present embodiment and existing catheter, to above-mentioned two
Kind catheter is measured in the temperature of exit position, is measured to the temperature of the outlet port of the least significant end of catheter,
The result data of measurement is as shown in Figure 4, wherein and S1 is the powder by atomization catheter 10 of the present embodiment, and S2 is existing catheter,
The crossover location between outlet port and the center line of catheter is indicated in 0.0 position in abscissa, arrival end in catheter
Melt temperature and the temperature of 0.0 position in abscissa are very close.By the number of results of measurement it was demonstrated that in existing catheter
The melt temperature of outlet end about 110K low compared with the melt temperature of arrival end, and 10 middle outlet of powder by atomization catheter of the present embodiment
The melt temperature at end about 20K low compared with the melt temperature of arrival end.It follows that the powder by atomization catheter 10 of the embodiment of the present invention
Thermal loss of melt when through tube body 1 is greatly reduced, melt superheat degree is ensure that, efficiently solves powder by atomization and lead
The blockage problem of liquid pipe 10, and improve the quality and production efficiency of fine powder.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of powder by atomization catheter, which is characterized in that it includes tube body, is had on the outer peripheral surface of the tube body recessed
Slot, the groove are recessed inwardly along the radial direction of the tube body, and the tube body is used for across nozzle, and the tube body
By having gap between the groove and the nozzle.
2. powder by atomization catheter as described in claim 1, which is characterized in that the bottom of the tube body has chamfering, institute
The lower surface that chamfering is exposed to the nozzle is stated, and is located between the outer surface of the chamfering and the lower surface of the nozzle same
In plane.
3. powder by atomization catheter as claimed in claim 2, which is characterized in that the outer surface of the chamfering and the tube body
Radial direction between angle be 45-75 degree.
4. powder by atomization catheter as described in claim 1, which is characterized in that the outer peripheral surface of the tube body is equipped with positioning
Portion, the positioning region are located at the top of the groove, and the positioning region extends outwardly protrusion along the radial direction of the tube body,
The bottom surface of the positioning region is used to be resisted against the top of the nozzle.
5. powder by atomization catheter as claimed in claim 4, which is characterized in that the bottom surface of the positioning region and the groove
It is in the same plane between upper side.
6. powder by atomization catheter as described in claim 1, which is characterized in that the bottom of the tube body has contact portion,
In the lower section of the groove, the contact portion extends protrusion along the radial direction of the tube body, described to connect for the contact site
The bottom of contact portion has annular groove, and the annular groove is recessed upwards along the axial direction of the tube body.
7. powder by atomization catheter as claimed in claim 6, which is characterized in that the groove depth of the groove is 0.5-1mm, described
The groove width of annular groove is 0.4-0.8mm.
8. powder by atomization catheter as described in claim 1, which is characterized in that the tube body is made of integrated molding.
9. powder by atomization catheter as described in claim 1, which is characterized in that the tube body stretches out the nozzle lower surface
Distance be 3-5mm.
10. powder by atomization catheter as described in claim 1, which is characterized in that the material of the tube body is ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409619.2A CN109249032B (en) | 2018-11-23 | 2018-11-23 | Atomized powder-making catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811409619.2A CN109249032B (en) | 2018-11-23 | 2018-11-23 | Atomized powder-making catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109249032A true CN109249032A (en) | 2019-01-22 |
| CN109249032B CN109249032B (en) | 2022-01-21 |
Family
ID=65042072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811409619.2A Active CN109249032B (en) | 2018-11-23 | 2018-11-23 | Atomized powder-making catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109249032B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784302A (en) * | 1986-12-29 | 1988-11-15 | Gte Laboratories Incorporated | Gas atomization melt tube assembly |
| CN102416481A (en) * | 2011-12-30 | 2012-04-18 | 上海应用技术学院 | Totally closed gas atomization pulverization device |
| CN102528058A (en) * | 2011-12-30 | 2012-07-04 | 上海应用技术学院 | Totally-enclosed gas atomizing powder making device for preventing high-melting-point substance from being blocked |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN204747508U (en) * | 2015-06-09 | 2015-11-11 | 湖南省冶金材料研究院 | Gaseous atomization preparation metal powder prevents blockking up spray nozzle device |
| CN204747507U (en) * | 2015-06-09 | 2015-11-11 | 湖南省冶金材料研究院 | Be suitable for preparation 3D to print spray nozzle device with metal powder |
| CN107042310A (en) * | 2017-05-05 | 2017-08-15 | 广东工业大学 | A kind of gas atomizing nozzle |
-
2018
- 2018-11-23 CN CN201811409619.2A patent/CN109249032B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784302A (en) * | 1986-12-29 | 1988-11-15 | Gte Laboratories Incorporated | Gas atomization melt tube assembly |
| CN102416481A (en) * | 2011-12-30 | 2012-04-18 | 上海应用技术学院 | Totally closed gas atomization pulverization device |
| CN102528058A (en) * | 2011-12-30 | 2012-07-04 | 上海应用技术学院 | Totally-enclosed gas atomizing powder making device for preventing high-melting-point substance from being blocked |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN204747508U (en) * | 2015-06-09 | 2015-11-11 | 湖南省冶金材料研究院 | Gaseous atomization preparation metal powder prevents blockking up spray nozzle device |
| CN204747507U (en) * | 2015-06-09 | 2015-11-11 | 湖南省冶金材料研究院 | Be suitable for preparation 3D to print spray nozzle device with metal powder |
| CN107042310A (en) * | 2017-05-05 | 2017-08-15 | 广东工业大学 | A kind of gas atomizing nozzle |
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| Publication number | Publication date |
|---|---|
| CN109249032B (en) | 2022-01-21 |
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