CN107020383A - Tundish and its jetting method, vacuum melting furnace for preparing metal dust - Google Patents
Tundish and its jetting method, vacuum melting furnace for preparing metal dust Download PDFInfo
- Publication number
- CN107020383A CN107020383A CN201710341796.0A CN201710341796A CN107020383A CN 107020383 A CN107020383 A CN 107020383A CN 201710341796 A CN201710341796 A CN 201710341796A CN 107020383 A CN107020383 A CN 107020383A
- Authority
- CN
- China
- Prior art keywords
- mozzle
- tundish
- molten metal
- metal dust
- prepare
- 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.)
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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
- B22F2009/0848—Melting process before atomisation
-
- 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
- B22F2009/0888—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 construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control
-
- 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
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The present invention relates to 3D printing increasing material manufacturing and metallurgical technology field, it is particularly used for preparing tundish and its jetting method, the vacuum melting furnace of metal dust, by connecting a mozzle in the lower section of tundish body, and the first heater block is separately provided outside mozzle, so as to which in the casting molten metal liquid into tundish, the molten metal bath flowed into using the temperature difference between mozzle and molten metal bath in mozzle is cooled down and is detained and blocks in mozzle；Then pass through the molten metal in the first heater block heating tundish to the uniform stabilization of fusing again, then the molten metal inside mozzle is heated, make mozzle formation jet, thus molten metal freezing caused by turning to pour the temperature difference is overcome, and the mozzle with small-bore nozzle is the problem of be difficult to form small line, uniform and stable and continuous small line can be obtained, so that beneficial to follow-up broken pulverizing process, the uniform metal dust of availability.
Description
Technical field
The present invention relates to 3D printing increasing material manufacturing and metallurgical technology field, and in particular to the centre for preparing metal dust
Bag and its jetting method, vacuum melting furnace.
Background technology
Metal dust is the important branch of material industry, using metal dust, can prepare high performance hardware.
In recent years, with the development of 3D printing technique, industrial circle is more urgent to the demand of metal dust.At present, high pressure gas is atomized
Method is to prepare one of conventional method of 3D printing metal dust, and the atomization of high pressure gas with crucible has that equipment investment is small, single stove
The characteristics of yield is high, production cost is relatively low, it is adaptable to the preparation of most of metal dust.However, high pressure gas is atomized legal system
Standby powder has that size distribution is uneven, particle surface has the defects such as satellite ball, the very big one side of generation of these defects
Reason is that the liquid stream crushed by high pressure gas is difficult to control to.
It is other that ultrasonication powder-making technique, radio frequency disturbances electrode crush the broken powder-making technique of powder-making technique, rotating centrifugal etc.
The method that powder processed is crushed by small line, is also intended to obtain a controllable molten metal stream first, uniform and stable and continuous small
Line prepares most important to the metal dust of this kind of technology.The flow that the controllability of molten metal stream is embodied in liquid stream is controllable, and
The liquid stream of formation has continuity.The flow of liquid stream depends primarily on tundish nozzle bore, and the nozzle of small-bore can be obtained
The relatively small line of sectional dimension, if this small line has continuity, then in follow-up broken pulverizing process, more
Beneficial to the acquisition uniform powder of performance.However, the nozzle of actual production small aperture is not likely to produce continuous line, on the one hand it is
Because turn molten metal for pouring into tundish crucible between melting kettle and tundish crucible because having the temperature difference, molten metal is caused to pour
In a period of time after entering, molten metal fusing is uneven, therefore the liquid stream flowed out through nozzle is discontinuous；On the other hand it is because nozzle
Aperture it is smaller, molten metal stream more easy freezing when flowing through nozzle, the small line resulted in is discontinuous, or even is formed without line
Or plugging.
The content of the invention
(1) technical problem to be solved
The present invention is to solve into basket pouring and tundish jet process, molten metal bath is easily because turning to pour temperature
Difference and form the technical problem freezing, be difficult to form small line with aperture tundish nozzle.
(2) technical scheme
In order to solve the above technical problems, the invention provides a kind of tundish for being used to prepare metal dust, the tundish
Including tundish body, mozzle is communicated with below the tundish body, the mozzle is used for the melting gold to inflow
Belong to liquid formation cooling, so that the molten metal after cooling is rested in the mozzle；The mozzle is externally provided with the first heating part
Part, first heater block is used for resting on the formation heating of the molten metal in the mozzle.
It is preferred that, first heater block is one or more combinations in induction coil, resistance and graphite.
It is preferred that, the mozzle is detachably connected with the tundish body.
The mozzle has slot structure, and the internal diameter of the slot structure is 0.5~2.5mm.
It is preferred that, the outside of the tundish body is provided with the second heater block.
It is preferred that, the tundish body is made up of magnesia material, and the mozzle is made up of boron nitride material, described
Mozzle is Nian Jie with the tundish body.
It is preferred that, the mozzle is gradually reduced by its top to the internal diameter of the slot structure.
It is preferred that, the mozzle is gradually increased by the internal diameter of its slot structure to bottom.
Present invention also offers a kind of vacuum melting furnace, the vacuum melting furnace includes as described above for preparing metal powder
The tundish at end.
Present invention also offers a kind of tundish jetting method, this method is：In the lower section of tundish, mozzle is set, to
Casting molten metal liquid in tundish, the melting flowed into using the temperature difference between mozzle and molten metal bath in mozzle
Molten metal cools down and is detained and blocks in mozzle；The molten metal in tundish is heated to uniform stabilization is melted, to water conservancy diversion
Molten metal inside pipe is heated, and makes mozzle formation jet.
(3) beneficial effect
Tundish and its jetting method provided by the present invention for preparing metal dust, by under tundish body
The mozzles of Fang Liantong mono-, and the first heater block is separately provided outside mozzle, so that in the casting molten metal into tundish
During liquid, the molten metal bath flowed into using the temperature difference between mozzle and molten metal bath in mozzle is cooled down and is detained
With closure in mozzle；Then again by the molten metal in the first heater block heating tundish to the uniform stabilization of fusing,
Then the molten metal inside mozzle is heated, makes mozzle formation jet, thus can be to turning to pour molten metal therein and enter
The function of row savings, heating and drainage, overcomes molten metal freezing caused by turning to pour the temperature difference, and with small-bore nozzle
The problem of mozzle is difficult to form small line, uniform and stable and continuous small line can be obtained, so that beneficial to follow-up broken system
Powder process, the uniform metal dust of availability.
It is a kind of including the above-mentioned tundish vacuum melting furnace for being used to prepare metal dust that the present invention is provided, due to tundish
Smoothly jet goes out high-quality small line, and tundish body and its jet position are not susceptible to freeze, therefore can realize true
Empty smelting furnace continuous smelting, improves smelting efficiency.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram for being used to prepare the tundish of metal dust of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the enlarged drawing, i.e. mozzle at I in Fig. 1；
Fig. 3 is the schematic diagram of melting kettle casting molten metal liquid into tundish body in the embodiment of the present invention；
Fig. 4 is that the schematic diagram of its interior metal liquid is being saved and heated to tundish body in the embodiment of the present invention；
Fig. 5 is the jet view of tundish body in the embodiment of the present invention.
In figure：
1st, tundish；3rd, melting kettle；4th, molten metal；1-1, tundish body；1-2, heat-insulation layer；1-3, the second heating part
Part；2-1, mozzle；2-2, the first heater block；2-3, back taper drainage entrance；2-4, slot structure；2-5, taper are drained
Mouthful；4-1, coolant stream；4-2, small line.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
With reference to shown in Fig. 1 to Fig. 3, it is provided in an embodiment of the present invention it is a kind of be used to prepare the tundish of metal dust, in this
Between bag 1 include tundish body 1-1, the top for tundish body 1-1 have opening, it is internal have it is generally cylindrical
Cavity, for receiving the molten metal bath 4 poured into a mould by melting kettle 3, tundish body 1-1 outside is provided with the second heating
Part 1-3, for being heated to the molten metal bath 4 in tundish body 1-1, tundish body 1-1 and the second heating part
There is heat-insulation layer 1-2 between part 1-3；The bottom of cavity is arc pan bottom shape structure, and center is provided with fluid hole；Tundish body 1-
1 lower section is provided with mozzle 2-1, and mozzle 2-1 top is connected with fluid hole, and mozzle 2-1 inside has slot structure
2-4, can have by itself certain thickness side wall cold and slot structure 2-4 effects to the shape of molten metal bath 4 of inflow
Into cooling, the molten metal bath 4 for making it internal is cooled to half poor curdled appearance of mobility, due to mozzle 2-1 exist it is narrow
Pore structure 2-4, thus the molten metal 4 of half curdled appearance liquid level bottom under surface tension and the collective effect of air pressure, can stop
Stay in the tiny holes of mozzle 2-1, close metal fluid course.
Mozzle 2-1 outside is additionally provided with the first heater block 2-2, first heater block 2-2 can for induction coil,
One or more combinations in resistance and graphite, the first heater block 2-2 is used for resting on the molten metal in mozzle 2-1
4 form heating, so that the molten metal 4 of its internal half curdled appearance melts, and then flow downward out mozzle 2-1.
Corresponding, the embodiment of the present invention additionally provides a kind of tundish jetting method, and this method is：In tundish 1
Lower section sets mozzle 2-1, the casting molten metal liquid 4 into tundish 1, using between mozzle 2-1 and molten metal bath 4
The molten metal bath 4 that the temperature difference is flowed into mozzle 2-1 cools down and is detained and blocks in mozzle 2-1；Heat tundish
Molten metal 4 in 1 heats to the molten metal 4 inside mozzle 2-1 to uniform stabilization is melted, forms mozzle 2-1
Jet.
From the foregoing, it will be observed that by the tundish and its jetting method of the embodiment of the present invention, it can enter to turning to pour molten metal 4 therein
Row savings, heating and drainage, overcome frozen problem of the molten metal 4 caused by turning to pour the temperature difference, and with small-bore nozzle
The problem of mozzle 2-1 is difficult to form small line, uniform and stable and continuous small line 4-2 can be obtained, so that beneficial to follow-up
Powder process processed is crushed, the uniform metal dust of performance is obtained.
Wherein, mozzle 2-1 by its top to slot structure 2-4 (i.e. region above slot structure 2-4) internal diameter by
It is decrescence small, inverted frustoconical is specifically may be configured as, as back taper drainage entrance 2-3, during such mozzle 2-1 tops are accepted
Between bag body 1-1 part internal diameter it is larger, on the one hand more readily flow into the molten metal bath 4 in tundish body 1-1 and lead
In flow tube 2-1, the curdled appearance on the other hand making molten metal 4 is in from top to bottom certain graded, the i.e. gold closer to top
Belong to liquid 4 due to bigger with the heat exchange area of molten metal 4 in tundish body 1-1, closer to molten condition, and closer to lower section
The temperature of molten metal 4 is lower, mobility is poorer, closer to curdled appearance, and in mozzle 2-1 and tundish body 1-1
Joining place is also not in heating blind area.
Further, mozzle 2-1 is by the interior of its slot structure 2-4 to bottom (i.e. region below slot structure 2-4)
Footpath gradually increases, and specifically may be configured as frustoconical, and 2-5 is exported as taper drainage, on the one hand, when half molten metal for solidifying shape
4 are heated to after uniform molten condition, because this segment space and top slot structure are that inclined-plane is excessive, so being easier broken
The surface tension of bad metal fluid column bottom surface, makes it easier to form jet；On the other hand, mozzle 2-1 integrally first shrinks and expanded afterwards
, overall is in Lavalle tubulose, so can be lifted the effluxvelocity of molten metal, forms the liquid stream of continuous-stable.
It is integrally formed in addition, tundish body 1-1 and mozzle 2-1 can be same material, but is preferably and tundish
Body 1-1 is detachably connected, and is bonded using different materials by resistant to elevated temperatures bonding agent, and for example tundish body 1-1 is by aoxidizing
Magnesium material is made, and mozzle 2-1 is made up of boron nitride material, and mozzle 2-1 is Nian Jie with tundish body 1-1；Mozzle 2-1's
The internal diameter at middle part is 0.5~2.5mm, therefore can select different inner diameters mozzle 2-1 as needed.
The embodiment of the present invention additionally provides a kind of vacuum melting furnace, and the vacuum melting furnace includes as described above for preparing
The tundish 1 of metal dust, due to tundish 1, smoothly jet goes out high-quality small line 4-2, and tundish body 1-1 and
Its jet position is not susceptible to freeze, therefore can realize the continuous smelting of vacuum melting furnace, improves smelting efficiency.
The specific implementation step of the embodiment of the present invention is as follows：
1. melting part feeds：Load metal material base into melting part.
2. container vacuum-pumping：Start mechanical pump, lobe pump, diffusion pump successively to equipped with melting kettle 3, tundish body 1-
1 and mozzle 2-1 container vacuum-pumping, vacuum is evacuated to 6.63 × 10-3Below Pa.
3. container reversely charging protective gas：Inert gas is filled with into said vesse, charge is 0.06MPa.
4. smelting metal：Melted uniformly using melting part smelting metal material base to molten metal 4.
5. to the tilt pouring of tundish 1, controllable beam is formed.
With reference to shown in Fig. 3 to Fig. 5, melting kettle 3 is rotated, uniform molten metal 4 will be melted and be poured into tundish body 1-1
It is interior.
Specifically, being turned to pour into after molten metal 4 in tundish body 1-1, molten metal 4 flows into mozzle 2-1 bottom nozzles
Slot structure 2-4 in, the passage of fluid flow is sealed after cooling；Start the second heater block 1-3, to tundish body 1-1
Interior molten metal 4 carries out the melting of a period of time, until tundish body 1-1 inner metal liquids 4 melt uniformly.
After the molten metal 4 of melting in tundish 1 is stable, the second heater block 1-3 is opened one in mozzle 2-1 is small
Section coolant stream 4-1 continuous heatings, will form uniform and stable small line 4-2 after coolant stream 4-1 fusings are uniform, draw from taper
Flow export 2-5 flows out.In small line 4-2 flow process, because back taper drainage entrance 2-3 cross sections are less than drainage exit cross-section,
The stream discharge rate of molten metal 4 is more than rate of influx, is so conducive to small line 4-2 outflow, forms the liquid stream flowed continually out.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of tundish for being used to prepare metal dust, it is characterised in that including tundish body, the tundish body
Lower section is communicated with mozzle, and the molten metal bath formation that the mozzle is used for inflow is cooled down, so that the molten metal after cooling
Rest in the mozzle；The mozzle is externally provided with the first heater block, and first heater block is used for resting on
Molten metal formation heating in the mozzle.
2. the tundish according to claim 1 for being used to prepare metal dust, it is characterised in that first heater block
For one or more combinations in induction coil, resistance and graphite.
3. according to claim 1 be used to prepare the tundish of metal dust, it is characterised in that the mozzle with it is described
Tundish body is detachably connected.
4. the tundish according to claim 1 for being used to prepare metal dust, it is characterised in that the tundish body
Outside is provided with the second heater block.
5. according to claim 1 be used to prepare the tundish of metal dust, it is characterised in that the tundish body by
Magnesia material is made, and the mozzle is made up of boron nitride material, and the mozzle is Nian Jie with the tundish body.
6. the tundish according to claim 1 for being used to prepare metal dust, it is characterised in that the mozzle has narrow
Pore structure, the internal diameter of the slot structure is 0.5~2.5mm.
7. the tundish according to claim 6 for being used to prepare metal dust, it is characterised in that the mozzle is by Qi Ding
The internal diameter to the slot structure is held to be gradually reduced.
8. being used for according to claim 6 or 7 prepares the tundish of metal dust, it is characterised in that the mozzle by
Its slot structure to the internal diameter of bottom gradually increases.
9. a kind of vacuum melting furnace, it is characterised in that prepare metal powder including being used for as described in any one of claim 1 to 8
The tundish at end.
10. a kind of tundish jetting method, it is characterised in that set mozzle in the lower section of tundish, is poured into a mould into tundish
Molten metal bath, the molten metal bath cooling flowed into using the temperature difference between mozzle and molten metal bath in mozzle,
And be detained and block in mozzle；The molten metal in tundish is heated to uniform stabilization is melted, to the gold inside mozzle
Category liquid is heated, and makes mozzle formation jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341796.0A CN107020383B (en) | 2017-05-16 | 2017-05-16 | It is used to prepare the tundish and its jetting method, vacuum melting furnace of metal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341796.0A CN107020383B (en) | 2017-05-16 | 2017-05-16 | It is used to prepare the tundish and its jetting method, vacuum melting furnace of metal dust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107020383A true CN107020383A (en) | 2017-08-08 |
| CN107020383B CN107020383B (en) | 2018-05-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710341796.0A Active CN107020383B (en) | 2017-05-16 | 2017-05-16 | It is used to prepare the tundish and its jetting method, vacuum melting furnace of metal dust |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238406A (en) * | 2019-05-31 | 2019-09-17 | 米亚索乐装备集成（福建）有限公司 | Gas-atomized powder equipment |
| 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 |
| CN112985058A (en) * | 2021-03-08 | 2021-06-18 | 重庆国际复合材料股份有限公司 | Rotary casting composite crucible |
| CN114589311A (en) * | 2022-03-16 | 2022-06-07 | 季华实验室 | Aluminum alloy melt flow control device and control method thereof |
| CN115253331A (en) * | 2022-07-25 | 2022-11-01 | 季华实验室 | Combined anti-blocking flow guide device and powder atomization equipment |
| CN116372178A (en) * | 2023-04-06 | 2023-07-04 | 扬州众力金属制造有限公司 | Powder preparation device for powder metallurgy forming of engine |
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| CN110238406A (en) * | 2019-05-31 | 2019-09-17 | 米亚索乐装备集成（福建）有限公司 | Gas-atomized powder equipment |
| 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 |
| CN112091226B (en) * | 2020-10-29 | 2024-05-28 | 佛山中研磁电科技股份有限公司 | Stable spraying device |
| CN112985058A (en) * | 2021-03-08 | 2021-06-18 | 重庆国际复合材料股份有限公司 | Rotary casting composite crucible |
| CN114589311A (en) * | 2022-03-16 | 2022-06-07 | 季华实验室 | Aluminum alloy melt flow control device and control method thereof |
| CN115253331A (en) * | 2022-07-25 | 2022-11-01 | 季华实验室 | Combined anti-blocking flow guide device and powder atomization equipment |
| CN116372178A (en) * | 2023-04-06 | 2023-07-04 | 扬州众力金属制造有限公司 | Powder preparation device for powder metallurgy forming of engine |
| CN116372178B (en) * | 2023-04-06 | 2023-10-03 | 扬州众力金属制造有限公司 | Powder preparation device for powder metallurgy forming of engine |
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