CN217858799U - Nozzle for preparing metal powder by vacuum gas atomization - Google Patents
Nozzle for preparing metal powder by vacuum gas atomization Download PDFInfo
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- CN217858799U CN217858799U CN202222138428.5U CN202222138428U CN217858799U CN 217858799 U CN217858799 U CN 217858799U CN 202222138428 U CN202222138428 U CN 202222138428U CN 217858799 U CN217858799 U CN 217858799U
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- metal
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 107
- 239000002184 metal Substances 0.000 title claims abstract description 107
- 239000000843 powder Substances 0.000 title claims abstract description 66
- 238000009689 gas atomisation Methods 0.000 title claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000004663 powder metallurgy Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 239000002245 particle Substances 0.000 description 16
- 238000004321 preservation Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000010146 3D printing Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The utility model belongs to the technical field of powder metallurgy, especially, relate to a nozzle that is used for vacuum gas atomization preparation metal powder. The utility model provides a nozzle for preparing metal powder by vacuum gas atomization, which comprises a nozzle body, wherein a metal liquid diversion cavity is arranged on the upper end surface of the nozzle body, a spray hole is arranged on the lower end surface of the nozzle body, the spray hole is a circular hole, and the spray hole is communicated with the metal liquid diversion cavity; the inner side wall of the spray hole is provided with a plurality of spiral grooves. The utility model discloses set up many helical flute at the orifice inside wall, after setting up like this, the metal liquid is under gravity and negative pressure, will be in the orifice bottom to the formula blowout of opening scattered all around, overcome the surface tension breakage for the metal melt and provide power, and enlarged the broken space of the high-pressure gas of jetting for the first time, refine and separate the breakage for the high-pressure gas secondary of jetting for the second time and provide the advantage, be favorable to reducing the metal powder granularity, and can effectively reduce satellite ball proportion, improve metal powder's farine rate, lumber recovery and suitability.
Description
Technical Field
The utility model belongs to the technical field of powder metallurgy, especially, relate to a nozzle that is used for vacuum gas atomization preparation metal powder.
Background
With the continuous maturity and development of 3D printing technology and injection molding technology, the market demand of metal powder materials is increasing. At present, the commonly used technique for preparing metal powder material by Gas Atomization method is Vacuum Induction melting-atomizing (VIGA). The vacuum induction melting gas atomization VIGA has wide application range, can be used for preparing alloy powder materials such as iron-based, nickel-based, cobalt-based, aluminum-based and copper-based powder materials, and is widely applied to the advanced manufacturing fields such as 3D printing, melting deposition, laser cladding, thermal spraying, powder metallurgy, hot isostatic pressing and the like. The working process of vacuum induction melting gas atomization VIGA comprises the following steps: 1. smelting: vacuumizing in the furnace, inducing, heating and melting the raw materials in the crucible in a vacuum environment, pouring molten metal into a tundish heat-insulating crucible after the technological requirements are met, and flowing into an atomizing nozzle through a flow guide pipe at the bottom of the heat-insulating crucible; 2. atomizing: introducing high-pressure inert gas into the atomizing nozzle, accelerating the high-pressure inert gas through the Laval structure cavity to form supersonic airflow, impacting and crushing the molten metal falling into the atomizing area, and atomizing the molten metal into fine metal droplets; 3. and (3) collecting powder: the liquid drops are changed into spherical particles by the surface tension in the air, and are rapidly cooled and solidified into metal powder in the atomizing chamber, and the metal powder is collected by a cyclone separation system.
The spray holes adopted by the traditional vacuum gas atomization powder making process are all circular holes, and after molten metal flows out of the spray holes, high-pressure injection gas firstly breaks molten metal flow for one time, so that the surface of the cylindrical molten metal flow is broken into belt-type liquid flow; and secondly, crushing the belt-type liquid flow by the high-pressure gas to form metal powder with fine particles. The main problems of the application of the metal powder prepared by the traditional vacuum atomization powder preparation process in the fields of additive manufacturing and 3D printing are as follows: 1. the high-pressure gas is injected for the first time to break, so that the temperature of the metal liquid is greatly reduced, the low-superheat-degree powder preparation is difficult to realize, and the fine powder rate and the yield are low; 2. the crushing space for crushing the high-pressure gas injected for the first time is small, so that the quality problem of the satellite ball is serious when the high-pressure gas injected for the second time is crushed; the 3.3D printing technology has strict requirements on the granularity of the raw material metal powder, the granularity of the metal powder is required to be 35-53 mu m, the granularity range of the metal powder prepared by the traditional two-stage high-pressure blowing gas crushing mode is 35-150 mu m, and the utilization rate of fine powder is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the nozzle for preparing the metal powder by vacuum gas atomization is simple in structure and can optimize the crushing mode of the metal liquid flow.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a nozzle for preparing metal powder by vacuum gas atomization, which comprises a nozzle body, wherein a metal liquid diversion cavity is arranged on the upper end surface of the nozzle body, a spray hole is arranged on the lower end surface of the nozzle body, the spray hole is a circular hole, and the spray hole is communicated with the metal liquid diversion cavity; the inner side wall of the spray hole is provided with a plurality of spiral grooves.
Further, the method comprises the following steps: the spiral grooves are uniformly arranged on the inner side wall of the spray hole.
Further, the method comprises the following steps: the spiral groove tooth form is triangular.
Further, the method comprises the following steps: the tooth form angle of the spiral groove is 72-92 degrees.
Further, the method comprises the following steps: the number of the spiral grooves is 8-12, and two adjacent spiral grooves 7 are connected in sequence.
Further, the method comprises the following steps: the helix angle of the spiral groove is 9-13 degrees.
Further, the method comprises the following steps: the major diameter of the spiral groove is 5-6mm, and the minor diameter is 3.5-4.5mm
Further, the method comprises the following steps: still include the spray tube, the spray tube is located inside the spray tube body, and molten metal water conservancy diversion chamber sets up in the spray tube, is provided with the spray tube at the inside upside of spray tube body and hangs the platform, and platform and spray tube adaptation are hung to the spray tube, and the spray tube passes through the spray tube and hangs the platform to be fixed at the nozzle originally internally, and spray tube upper end lateral wall, spray tube lower extreme lateral wall closely laminate with spray tube body inner wall.
Further, the method comprises the following steps: and a heat insulation cavity is arranged between the outer side wall of the middle part of the spray pipe and the inner side wall of the nozzle body.
Further, the method comprises the following steps: the nozzle body is provided with a nozzle body upper surface, and the lower end surface of the nozzle body is communicated with the metal liquid diversion cavity.
The utility model has the advantages that: the utility model discloses a improve the orifice, be provided with many helical flute at the orifice inside wall, after setting up like this, the metal liquid is under gravity and negative pressure, will be in the orifice bottom to open scattered formula blowout all around, overcome the broken power that provides of surface tension for the metal melt, and enlarged the broken space of jetting high-pressure gas for the first time, refine and separate the breakage for the jetting high-pressure gas secondary of the second time and provide the advantage, be favorable to reducing the metal powder granularity, and can effectively reduce satellite ball proportion, improve metal powder's farine rate, lumber recovery and suitability.
Drawings
FIG. 1 is a schematic view of a nozzle body and spout assembly;
FIG. 2 is a schematic view of a lower end face of the nozzle body;
FIG. 3 is a schematic view of a nozzle body;
FIG. 4 is a schematic view of a nozzle;
FIG. 5 is a graph of the morphology of metal powder produced after using a conventional nozzle;
FIG. 6 is a graph showing the morphology of metal powder produced by the nozzle for producing metal powder by vacuum atomization according to the present invention.
Labeled as: 1-nozzle body, 2-spray hole, 3-spray pipe, 4-spray pipe hanging table, 5-heat insulation cavity, 6-guide pipe positioning groove, 7-spiral groove and 8-molten metal diversion cavity.
Detailed Description
The following detailed description of the present invention will be provided in order to further understand the concept of the present invention, the technical problems, the technical features constituting the technical solutions, and the technical effects brought by the technical features of the present invention, which are described in the following with reference to the accompanying drawings. However, the description of the embodiments is illustrative and not intended to limit the present invention.
The utility model provides a nozzle for preparing metal powder by vacuum gas atomization, which comprises a nozzle body 1, wherein the upper end surface of the nozzle body 1 is provided with a metal liquid diversion cavity 8, the lower end surface of the nozzle body 1 is provided with a spray hole 2, the spray hole 2 is a circular hole, and the spray hole 2 is communicated with the metal liquid diversion cavity 8; the inner side wall of the spray hole 2 is provided with a plurality of spiral grooves 7.
It should be understood by those skilled in the art that, in the preparation of metal powder by gas atomization, the nozzle body 1 is installed on the nozzle body installation cavity in the middle of the spray plate, so the shape of the nozzle body 1 is not limited in the present invention, and the shape is adapted to the nozzle body installation cavity on the spray plate. The nozzle is positioned at the lower part of the heat preservation bag, molten metal is stored in the heat preservation bag, the lower part of the heat preservation bag is also provided with a flow guide pipe, the upper end of the flow guide pipe is communicated with the heat preservation bag, and the lower end of the flow guide pipe is communicated with the metal liquid flow guide cavity 8. The nozzle body 1 is provided with a nozzle hole 2 on the lower end surface, and the nozzle hole 2 is communicated with the molten metal diversion cavity 8. And then the molten metal flows to the flow guide pipe from the heat preservation bag, then flows to the molten metal flow guide cavity 8, finally flows to the spray holes 2 and is sprayed out from the spray holes 2. It will also be understood by those skilled in the art that the molten metal is ejected under negative pressure and gravity after it reaches the exit orifice.
In the conventional solution, the nozzle hole 2 of the nozzle is usually a circular hole, the molten metal sprayed from the nozzle hole 2 is in a cylindrical shape, and the molten metal in the cylindrical shape is intended to be supplied to the metal powder crushed into powder, and the steps are two: the first step is that the columnar molten metal is firstly crushed by high-pressure gas which is blown for the first time, the molten metal flowing out from the spray holes 2 is impacted by the high-pressure gas, and disturbance is generated on the surface of the molten metal, so that the columnar molten metal which originally flows stably becomes unstable and gradually develops into waves, and the columnar molten metal is crushed into belt-type liquid flow in the process. And the second step is to carry out secondary crushing on the belt-type liquid flow by secondary blowing of high-pressure gas to form fine liquid drops, and the liquid drops are changed into spheres under the action of surface tension and then are solidified to form metal powder with fine particles. It should be understood by those skilled in the art that the crushing of the columnar shape by the first injection of the high-pressure gas provides a crushing space for the second crushing of the high-pressure gas, the temperature of the molten metal is rapidly reduced in the process, the temperature is excessively reduced, the powder making with low superheat degree is difficult to realize, and the fine powder rate and the yield are low; the crushing space of the high-pressure gas injected for the first time is small, so that the quality problem of the satellite ball is serious when the high-pressure gas injected for the second time is crushed; when the high-pressure gas is blown for the second time for crushing, the indexes of the metal liquid flow, such as temperature, viscosity and the like, are reduced, the fine powder rate and the yield are low, the powder forms only a winding columnar liquid flow, the crushing space is limited, the powder adhesion is serious, and the proportion of the satellite balls is high.
The utility model overcomes the shortcoming of traditional scheme improves orifice 2, is provided with many spiral groove 7 at 2 inside walls of orifice. The spiral groove 7 is arranged to ensure that the molten metal sprayed out of the nozzle 2 is not columnar any more, but is sprayed out in a scattered manner towards the periphery. The arrangement can crush the molten metal for one time under the condition that high-pressure gas is not injected, and the crushing provides power for the subsequent crushing of the molten metal under the action of the injected high-pressure gas by overcoming the surface tension; and a larger crushing space is created for the follow-up blowing of high-pressure gas for secondary crushing.
Preferably, the spiral grooves 7 are uniformly arranged on the inner side wall of the spray hole 2. Spiral groove 7 evenly sets up, is favorable to the molten metal to move towards evenly dispersed all around, and then provides bigger broken space for follow-up jetting high-pressure gas is broken.
In the embodiment of the utility model, the spiral groove 7 is selected to have a triangular tooth shape; the profile angle is 82 °; the number of the spiral grooves 7 is 10, and the two spiral grooves 7 are connected in sequence; the helix angle is 79 degrees; the major diameter of the spiral groove is 5.5mm, and the minor diameter is 4mm. Under the conditions that a 5KG vacuum gas atomization powder making furnace is selected as the spiral groove 7 with the parameters, 304 (0 Cr18Ni 9) is selected as the metal powder variety, the vacuum degree is set to be 0.5Pa, the superheat degree is set to be 205 ℃, and the blowing air pressure is set to be 3.5MPa, the proportion of the particle size of the prepared metal powder is 4.2 percent when the particle size is less than or equal to 20 micrometers, and the proportion of the particle size is 24.3 percent when the particle size is more than 20 micrometers and less than or equal to 53 micrometers; the proportion of the particle diameter of more than 53 μm and less than 150 μm is 38.9%; the proportion of the particle diameter of more than or equal to 150 μm is 32.6%; the graphical representation of the morphology of the metal powder after its formation is shown schematically in fig. 6. Only the spray hole 2 is changed into a circular hole shape, the diameter of the circular hole-shaped spray hole 2 is 4mm, under the condition that other conditions are not changed, the proportion of the particle size of the prepared metal powder is 2.0 percent, the proportion of the particle size of the metal powder is more than or equal to 20 mu m, and the proportion of the particle size of the metal powder is more than 20 mu m and less than or equal to 53 mu m is 15.8 percent; the proportion of the particle diameter of more than 53 mu m and less than 150 mu m is 28.3 percent; the proportion of particles having a particle size of 150 μm or more was 53.9%, and the morphology of the metal powder after molding is schematically shown in FIG. 5.
In conclusion, the nozzle of the utility model effectively reduces the granularity of the metal powder, and the proportion of the particle diameter less than or equal to 20 μm is increased by 110%; the proportion of the grain diameter of more than 20 μm and less than or equal to 53 μm is improved by 50 percent; the proportion of the grain diameter larger than 53 mu m and smaller than 150 mu m is improved by 37 percent; the ratio of particles having a particle diameter of 150 μm or more was reduced by 39%. Adopt the utility model discloses afterwards, metal powder adhesion problem has obtained effective solution, greatly reduced satellite ball proportion, reduces the metal powder particle diameter, as shown in fig. 5, 6. In the present invention, the tooth shape of the spiral groove 7 is not limited, and may be rectangular, trapezoidal, etc. In the present invention, preferably, the tooth shape of the spiral groove 7 is triangular. The spiral direction is not limited in the utility model, and both left-handed rotation and right-handed rotation can be realized, and the effect of dispersing the columnar molten metal can be realized by the spiral direction in both left-handed rotation and right-handed rotation.
The thread angle of the spiral groove 7 is preferably 72-92 deg..
The number of the spiral grooves 7 is 8-12, and the two adjacent spiral grooves 7 are connected in sequence.
It should be understood by those skilled in the art that the metal liquid is too cold to solidify easily, and if the helix angle of the spiral groove 7 is small, the metal liquid will flow slowly in the spray hole 2 and will pass through the spray hole 2 and the metal liquid guiding cavity 8 for a long time, so that the temperature of the metal liquid will decrease rapidly in the interval from the thermal insulation bag to the spray hole 2, and the fine powder rate and the yield will be affected. Preferably, the thread groove helix angle is 69 ° to 89 °.
The major diameter of the spiral groove 7 is 5-6mm, and the minor diameter is 3.5-4.5mm.
The utility model discloses a nozzle for vacuum atomization preparation metal powder still includes spray tube 3, and spray tube 3 is located spray tube body 1 inside, and molten metal water conservancy diversion chamber 8 sets up in spray tube 3, is provided with spray tube string platform 4 at 1 inside upsides of spray tube body, and spray tube string platform 4 and spray tube 3 adaptation, spray tube 3 hang platform 4 through the spray tube and fix in spray tube body 1, and spray tube 3 upper end lateral walls, 12 lower extreme lateral walls of spray tube closely laminate with 1 inner wall of spray tube body.
The nozzle body 1 can be protected by the nozzle 3, and the nozzle body 1 is prevented from being overheated and hot cracked. In the embodiment of the utility model provides an in as shown in fig. 1, the inside upside of nozzle body 1 is provided with the spray tube and hangs platform 4 in the embodiment of the utility model embodiment spray tube is hung platform 4 and is the slope form of downward sloping, has the slope form arch of hanging platform 4 adaptations with the spray tube on spray tube 3, when the installation with spray tube 3 from nozzle body up 1 terminal surface insert can. The spray pipe 3 is fixed in the spray nozzle body under the action of the spray pipe hanging platform 4. The lateral wall of the upper end of the spray pipe 3, the lateral wall of the lower end of the spray pipe 12 and the inner wall of the spray pipe body 1 are tightly attached, so that the spray pipe 3 can be firmly fixed, and the phenomenon that the metal liquid flows due to the left-right shaking is prevented.
Further, a heat insulation cavity 5 is arranged between the outer side wall of the middle part of the spray pipe 3 and the inner side wall of the nozzle body 1. In the embodiment of the present invention, as shown in fig. 1, the outer side wall of the upper end of the spray pipe 3 and the outer side wall of the lower end of the spray pipe 12 are closely attached to the inner wall of the spray pipe body 1, but the middle side wall of the spray pipe 3 is not attached to the inner side wall of the nozzle body 1, and a heat insulation cavity is formed between the middle side wall of the spray pipe 3 and the inner side wall of the nozzle body 1. By the structural design, on one hand, the heat transfer rate can be reduced, the heat conduction to the nozzle body 1 is reduced, and the function of preventing the nozzle body 1 from being hot cracked is realized; on the other hand, the reduction of the heat conduction rate can reduce the temperature loss of the molten metal in the molten metal diversion cavity 8, thereby facilitating the subsequent powder preparation by injecting high-pressure gas.
Further, the utility model discloses a nozzle for vacuum gas atomization preparation metal powder still includes honeycomb duct positioning groove 6, and honeycomb duct positioning groove 6 sets up at 1 upper surface of nozzle body, and 6 lower terminal surfaces of honeycomb duct positioning groove and the 8 intercommunications in metal liquid water conservancy diversion chamber of honeycomb duct positioning groove. The guide pipe positioning groove 6 is arranged for limiting the lower end of the guide pipe, and the lower end of the guide pipe is communicated with the molten metal diversion cavity 8 so as to introduce the molten metal in the heat-preservation crucible into the molten metal diversion cavity 8. Therefore, the guide pipe positioning groove 6 is arranged on the upper surface of the nozzle body 1, and the lower end surface of the guide pipe positioning groove 6 is communicated with the molten metal guide cavity 8. The utility model discloses in the embodiment, as shown in FIG. 1, terminal surface flushes with 3 up ends on the spray tube under 6 honeycomb duct positioning groove, selects lateral wall size adaptation under 6 inside wall sizes of honeycomb duct positioning groove and the honeycomb duct, and in the honeycomb duct lower extreme inserted honeycomb duct positioning groove 6, 6 inside walls of honeycomb duct positioning groove and the laminating of honeycomb duct lower extreme lateral wall.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The nozzle for preparing the metal powder by vacuum gas atomization comprises a nozzle body (1), wherein a metal liquid diversion cavity (8) is formed in the upper end face of the nozzle body (1), a spray hole (2) is formed in the lower end face of the nozzle body (1), the spray hole (2) is a circular hole, and the spray hole (2) is communicated with the metal liquid diversion cavity (8); the method is characterized in that: the inner side wall of the spray hole (2) is provided with a plurality of spiral grooves (7).
2. The nozzle for vacuum gas atomization of metal powder according to claim 1, wherein: the spiral grooves (7) are uniformly arranged on the inner side wall of the spray hole (2).
3. The nozzle for vacuum gas atomization of metal powder according to claim 1, wherein: the tooth shape of the spiral groove (7) is triangular.
4. The nozzle for vacuum gas atomization of metal powder according to claim 3, wherein: the tooth form angle of the spiral groove (7) is 72-92 degrees.
5. The nozzle for vacuum gas atomization of metal powder according to claim 1, wherein: the number of the spiral grooves (7) is 8-12, and two adjacent spiral grooves (7) are connected in sequence.
6. The nozzle for vacuum gas atomization of metal powder according to claim 1, wherein: the helix angle of the helical groove (7) is 69-89 degrees.
7. The nozzle for vacuum gas atomization of metal powder according to claim 1, wherein: the major diameter of the spiral groove (7) is 5-6mm, and the minor diameter is 3.5-4.5mm.
8. The nozzle for vacuum gas atomization production of metal powder according to any one of claims 1 to 7, characterized in that: still include spray tube (3), spray tube (3) are located inside nozzle body (1), molten metal water conservancy diversion chamber (8) set up in spray tube (3), are provided with spray tube hanging platform (4) at the inside upside of nozzle body (1), spray tube hanging platform (4) and spray tube (3) adaptation, spray tube (3) are fixed in nozzle body (1) through spray tube hanging platform (4), spray tube (3) upper end lateral wall, spray tube (3) lower extreme lateral wall closely laminates with nozzle body (1) inner wall.
9. The nozzle for vacuum gas atomization of metal powder according to claim 8, wherein: a heat insulation cavity (5) is arranged between the outer side wall of the middle part of the spray pipe (3) and the inner side wall of the nozzle body (1).
10. The nozzle for vacuum atomization production of metal powders according to any one of claims 1 to 7, wherein: the nozzle is characterized by further comprising a guide pipe positioning groove (6), the guide pipe positioning groove (6) is formed in the upper surface of the nozzle body (1), and the lower end face of the guide pipe positioning groove (6) is communicated with the molten metal guide cavity (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222138428.5U CN217858799U (en) | 2022-08-15 | 2022-08-15 | Nozzle for preparing metal powder by vacuum gas atomization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222138428.5U CN217858799U (en) | 2022-08-15 | 2022-08-15 | Nozzle for preparing metal powder by vacuum gas atomization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217858799U true CN217858799U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222138428.5U Active CN217858799U (en) | 2022-08-15 | 2022-08-15 | Nozzle for preparing metal powder by vacuum gas atomization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217858799U (en) |
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2022
- 2022-08-15 CN CN202222138428.5U patent/CN217858799U/en active Active
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