CN109777982B - Aluminum alloy casting preparation facilities - Google Patents
Aluminum alloy casting preparation facilities Download PDFInfo
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- CN109777982B CN109777982B CN201910216660.6A CN201910216660A CN109777982B CN 109777982 B CN109777982 B CN 109777982B CN 201910216660 A CN201910216660 A CN 201910216660A CN 109777982 B CN109777982 B CN 109777982B
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Abstract
The invention discloses preparation of aluminum alloy castingsDevice relates to aluminum alloy preparation technical field. In the using process of the device, pure aluminum powder, pure titanium powder and titanium borohydride powder are uniformly mixed to serve as a refiner, the refiner mixed powder is preheated at high temperature to decompose the titanium borohydride, and self-propagating reaction in the refiner mixed powder is carried out at high temperature to form fine TiAl3And TiB2And (2) extruding the particles at high temperature to form a filamentous refiner containing hydrogen holes, cutting the filamentous refiner into fine blocky refiners, spraying the fine blocky refiners into the aluminum alloy melt by a high-pressure spraying method, refining after the melt is solidified, and removing residual hydrogen elements in the aluminum alloy melt by vacuumizing. The device is simple in structure, the prepared aluminum alloy is good in refining effect, and the strength of the aluminum alloy casting is improved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy preparation devices, in particular to a preparation device for aluminum alloy castings.
Background
The Al-Ti-B intermediate alloy is which is the most important refiner for refining the structure of aluminium alloy, and is used in in the world of aluminium alloy casting and rolling and other manufacturing fields3And TiB2The particles have the refining effect, the action mechanism of the particles is not very clear at present, and the shape, the size and the content of the particles mainly influence the refining effect. TiAl in Al-Ti-B refiner in international standard3And TiB2There are definite limits to the size of the particles. The smaller the particles are, the more obvious the thinning effect is, and the better the mechanical property of the aluminum alloy is.
The aluminum alloy is widely applied to the industrial fields of aviation, aerospace, automobile, ship manufacturing and the like, the thinning structure of cast alloy is controlled and the forging stock structure is influenced by a refiner to a great extent in the aluminum alloy industry, so that the preparation of the aluminum-titanium-boron refiner and the thinning of the aluminum alloy are particularly important, and the aluminum-titanium-boron refiner has great market value 4And K2TiF6Heating with Al at high temperature. KBF 4And K2TiF6The salt contains B And the effective content of Ti is low, and the process is complex.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide aluminum alloy casting preparation devices with simple process and good refining effect.
In order to solve the technical problems, the invention adopts the technical scheme that the aluminum alloy casting preparation device is characterized by comprising a furnace body and a base, wherein the base is fixed at the bottom of the furnace body, a smelting crucible is arranged on the base in the furnace body, aluminum alloy raw materials to be heated are arranged in the smelting crucible, a melt heater is arranged outside the smelting crucible, a refiner providing mechanism is arranged in the furnace body above the smelting crucible and used for forming an aluminum alloy refiner, and the refiner providing mechanism is fixed on the inner wall of the furnace body through a fixing rod.
, the refiner providing mechanism comprises a refiner female die, a refiner forming cavity with an opening at the upper end is formed in the female die, a secondary pulverizing die is arranged at the lower side of the female die, a secondary pulverizing cavity is formed in the secondary pulverizing die, the female die is fixedly connected with the secondary pulverizing die, an extrusion heating die is arranged in the refiner forming cavity, a powder heater is arranged in the extrusion heating die, an extrusion wire discharge pipe communicated with the refiner forming cavity and the secondary pulverizing cavity is arranged on the extrusion heating die, a die sleeve is arranged in the refiner forming cavity at the upper side of the heating die, a heatable punch assembly is arranged in the die sleeve, and a placing space for mixed powder of the refiner is formed in the space among the extrusion heating die, the die sleeve and the punch assembly;
the secondary pulverization intracavity of discharge pipe downside is provided with the secondary pulverization wheel of two relative settings, and the refiner inlet port between two secondary pulverization wheels is located under the discharge pipe, be formed with the refiner nozzle on the secondary pulverization mould of refiner discharge port downside between the secondary pulverization wheel, the refiner nozzle is located the top of crucible, be provided with pulverization wheel drive arrangement in the secondary pulverization intracavity, drive arrangement is used for the drive pulverization wheel motion, and high-pressurepipe's end is located outside the furnace body, high-pressurepipe's end extends to the secondary pulverization intracavity for carry inert gas to the secondary pulverization intracavity.
, the punch assembly comprises a punch, an electric pulser is arranged in the punch, an ignition electrode is arranged at the lower end of the electric pulser, a high-temperature briquetting is arranged at the lower side of the ignition electrode and is directly contacted with the mixed powder of the refiner, the temperature of the high-temperature briquetting is raised through the electric pulser, and then the mixed powder of the refiner is heated.
, arranging a sealing ring between the punch and the die sleeve.
the technical proposal is that the outside of the furnace body is provided with a punch driving device for driving the punch to move up and down.
Preferably, the material for making the extrusion heating mold is ceramic material.
the second sealing ring is arranged between the mother mould of refiner and the secondary pulverizing mould.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: in the using process of the device, pure aluminum powder, pure titanium powder and titanium borohydride powder are uniformly mixed to serve as a refiner, the refiner mixed powder is preheated at high temperature to decompose the titanium borohydride, and self-propagating reaction in the refiner mixed powder is carried out at high temperature to form fine TiAl3And TiB2And (2) extruding the particles at high temperature to form a filamentous refiner containing hydrogen holes, cutting the filamentous refiner into fine blocky refiners, spraying the fine blocky refiners into the aluminum alloy melt by a high-pressure spraying method, refining after the melt is solidified, and removing residual hydrogen elements in the aluminum alloy melt by vacuumizing. The device is simple in structure, the prepared aluminum alloy is good in refining effect, and the strength of the aluminum alloy casting is improved.
Drawings
The invention is described in further detail with reference to the figures and the detailed description.
FIG. 1 is a schematic diagram of the structure of an apparatus according to an embodiment of the present invention;
the device comprises a punch 1, a die sleeve 2, a die sleeve 3, a refiner mixed powder 4, a refiner female die 5, a fixing rod 6, an extrusion heating die 6-1, an extrusion wire discharge pipe 7, a high-pressure gas pipe 8, a pulverizing wheel driving device 9, a secondary pulverizing wheel 9, a secondary pulverizing cavity 10, a secondary pulverizing die 11, a refiner nozzle 11-1, a base 12, a melt heater 13, an aluminum alloy melt 14, a smelting crucible 15, a refiner particle 16, a sealing ring 17, a powder heater 18, a furnace body 19, a second sealing ring 20, a high-temperature briquetting 21, a ignition electrode 22 and an electric pulser 23.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention, rather than all embodiments.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and one skilled in the art may make similar reference without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in FIG. 1, the embodiment of the invention discloses a preparation device of aluminum alloy castings, which comprises a furnace body 19 and a base 12, wherein the base 12 is fixed at the bottom of the furnace body 19, the furnace body 19 and the base 12 jointly form a reaction space of the device, a smelting crucible 15 is arranged on the base 12 in the furnace body 19, aluminum alloy raw materials to be heated are arranged in the smelting crucible 15, a melt heater 13 is arranged outside the smelting crucible 15, a refiner providing mechanism is arranged in the furnace body 19 above the smelting crucible 15 and used for forming an aluminum alloy refiner, and the refiner providing mechanism is fixed on the inner wall of the furnace body 19 through a fixing rod 5.
, as shown in fig. 1, the refiner providing mechanism comprises a refiner female die 4, a refiner forming cavity with an opening at the upper end is formed in the female die, a secondary pulverizing die 11 is arranged at the lower side of the female die, a secondary pulverizing cavity 10 is formed in the secondary pulverizing die 11, the female die is fixedly connected with the secondary pulverizing die 11, preferably, a second sealing ring 17 is arranged between the refiner female die 4 and the secondary pulverizing die 11 for realizing good sealing between the two, a squeezing and heating die 6 is arranged in the refiner forming cavity, the material for manufacturing the squeezing and heating die 6 is preferably a ceramic material, a powder heater 18 is arranged in the squeezing and heating die 6, an extrusion wire discharge pipe 6-1 for communicating the refiner forming cavity and the secondary pulverizing cavity 10 is arranged on the squeezing and heating die 6, a die sleeve 2 is arranged in the refiner forming cavity at the upper side of the heating die, a heatable punch component is arranged in the die sleeve 2, and a space among the squeezing and heating die 6, the die sleeve 2 and the punch component forms a placing space for placing the mixed powder of the refiner;
as shown in figure 1, two oppositely arranged secondary pulverizing wheels 9 are arranged in a secondary pulverizing cavity 10 at the lower side of the discharge pipe, a refiner inlet between the two secondary pulverizing wheels 9 is positioned right below the discharge pipe, a refiner nozzle 11-1 is formed on a secondary pulverizing mould 11 at the lower side of a refiner discharge port between the secondary pulverizing wheels 9, the refiner nozzle 11-1 is positioned above the crucible 15, a pulverizing wheel driving device 8 is arranged in the secondary pulverizing cavity 10 and used for driving the pulverizing wheels to move, the end of a high-pressure gas pipe 7 is positioned outside the furnace body 19, and the other end of the high-pressure gas pipe 7 extends into the secondary pulverizing cavity 10 and is used for conveying inert gas into the secondary pulverizing cavity 10.
, as shown in fig. 1, the punch assembly comprises a punch 1, wherein an electric pulser 23 is arranged in the punch 1, an ignition electrode 22 is arranged at the lower end of the electric pulser 23, a high-temperature compact 21 is arranged at the lower side of the ignition electrode 22, the high-temperature compact 21 is in direct contact with the refiner mixed powder 3, the high-temperature compact 21 is heated by the electric pulser 23, and then the refiner mixed powder 3 is heated, preferably, a sealing ring 20 is arranged between the punch 1 and the die sleeve 2 for realizing good sealing between the punch 1 and the die sleeve 2, and a punch driving device is arranged at the outer side of the furnace body 19 for driving the punch 1 to move up and down according to the process requirements.
The embodiment of the invention also discloses a preparation method of the aluminum alloy castings, which comprises the following steps:
uniformly mixing pure aluminum powder, pure titanium powder and titanium borohydride powder to form refiner mixed powder 3, putting the refiner mixed powder 3 into a placing space formed by a space among an extrusion heating die 6, a die sleeve 2 and a punch assembly to form the refiner mixed powder, and compacting the refiner mixed powder 3 on the placing space through the punch assembly; preferably, the ratio of Al in the pure aluminum powder, the pure titanium powder and the titanium borohydride powder is: the molar ratio of Ti is 3-9: 1, Ti: ti (BH)4)3In a molar ratio of 5: 1;
putting an aluminum alloy raw material into a smelting crucible 15 at the lower side of a furnace body 19, sealing the aluminum alloy raw material into the furnace body 19 through a base 12, and heating the aluminum alloy raw material by using a melt heater 13 at the outer side of the crucible 15 to form an aluminum alloy melt 14;
an electric pulse device 23 positioned in the punch assembly is started, the high-temperature briquetting 21 is used for heating the refiner mixed powder 3 through an ignition electrode 22 at the lower side of the electric pulse device 23, the titanium borohydride in the refiner mixed powder 3 close to the high-temperature briquetting 21 is heated and firstly decomposed into nanometer and micrometer-scale Ti powder, B powder and gaseous hydrogen, and Ti and B in the refiner mixed powder placing space react to form TiB2Particles, Ti and Al in the space for placing the mixed powder of the refiner react to form TiAl3The particles continuously decompose titanium borohydride along with the heat release of the self-propagating reaction, and the self-propagating reaction is continuously carried out; the punch 1 is then slowly pressed down so that fine TiAl is contained3And TiB2Slowly feeding the granular intermediate alloy into the secondary pulverizing cavity 10 of the secondary pulverizing mould 11 via the extruding wire discharge pipe on the lower side of the extruding heating mould, feeding part of decomposed hydrogen into the furnace body 19 via the extruding wire discharge pipe 6-1, and discharging via the exhaust hole from the furnace body 19, part of hydrogen forming air holes in the intermediate alloy, igniting the self-propagating reaction, and starting the powder heater 18 in the extruding heating mould 6 to preheat the intermediate alloy；
Pressing the mixed powder 3 of the refiner downwards with a punch 1 to extrude the newly formed intermediate alloy into a secondary pulverization chamber 10 through an extrusion wire discharge pipe 6-1 and form a filamentous shape, cutting the filamentous intermediate alloy into refiner particles 16 by a secondary pulverization wheel 9 in the secondary pulverization chamber 10 under the action of a pulverization wheel driving device 8, injecting high-pressure inert gas into the secondary pulverization chamber 10 through a high-pressure gas pipe 7 with an end and another end outside the furnace body, injecting the refiner particles 16 into an aluminum alloy melt 14 through a refiner nozzle 11-1, and carrying out micro explosion on TiAl in the hydrogen gas along with the melting of the refiner particles 16 due to the fact that the fine refiner particles 16 contain hydrogen holes formed under high pressure3And TiB2The particles are uniformly dispersed in the aluminum alloy melt 14;
when the amount of the injected grain refiner reaches the required amount of the aluminum alloy melt 14, stopping the movement of the punch 1 and simultaneously stopping the heating of the powder heater 18; and vacuumizing the furnace body 19, filling inert gas or air to 1 atmosphere, opening the base 12, taking out the smelting crucible 15, and casting and molding the casting.
The method comprises the steps of firstly, uniformly mixing pure aluminum powder, pure titanium powder and titanium borohydride powder to serve as a refiner, preheating the refiner mixed powder at high temperature to decompose the titanium borohydride, and enabling self-propagating reaction in the refiner mixed powder to form fine TiAl at high temperature3And TiB2And (2) extruding the particles at high temperature to form a filamentous refiner containing hydrogen holes, cutting the filamentous refiner into fine blocky refiners, spraying the fine blocky refiners into the aluminum alloy melt by a high-pressure spraying method, refining after the melt is solidified, and removing residual hydrogen elements in the aluminum alloy melt by vacuumizing. The method has simple process, the prepared aluminum alloy has good refining effect, and the strength of the aluminum alloy casting is improved.
Claims (6)
- The preparation device of the aluminum alloy castings is characterized by comprising a furnace body (19) and a base (12), wherein the base (12) is fixed at the bottom of the furnace body (19), a smelting crucible (15) is arranged on the base (12) in the furnace body (19), aluminum alloy raw materials to be heated are arranged in the smelting crucible (15), a melt heater (13) is arranged on the outer side of the smelting crucible (15), a refiner providing mechanism is arranged in the furnace body (19) on the upper side of the smelting crucible (15), the refiner providing mechanism is used for forming an aluminum alloy refiner, and the refiner providing mechanism is fixed on the inner wall of the furnace body (19) through a fixing rod (5);the refiner supply mechanism comprises a refiner female die (4) in which a refiner forming cavity with an upper end opening is formed, a secondary pulverization die (11) is arranged at the lower side of the female die, a secondary pulverization cavity (10) is formed in the secondary pulverization die (11), the female die is fixedly connected with the secondary pulverization die (11), an extrusion heating die (6) is arranged in the refiner forming cavity, a powder heater (18) is arranged in the extrusion heating die (6), and an extrusion filament discharge pipe (6-1) communicated with the refiner forming cavity and the secondary pulverization cavity (10) is arranged on the extrusion heating die (6), a mold sleeve (2) is arranged in the refiner forming cavity at the upper side of the heating mold, a heatable punch component is arranged in the mold sleeve (2), the space among the extrusion heating die (6), the die sleeve (2) and the punch assembly forms a placing space for the mixed powder of the refiner;be provided with two secondary pulverization wheels (9) of relative setting in secondary pulverization chamber (10) of discharge pipe downside, the refiner inlet port between two secondary pulverization wheels (9) is located under the discharge pipe, be formed with refiner nozzle (11-1) on secondary pulverization mould (11) of refiner discharge port downside between secondary pulverization wheel (9), refiner nozzle (11-1) is located smelt the top of crucible (15), be provided with pulverization wheel drive (8) in secondary pulverization chamber (10), drive arrangement is used for the drive pulverization wheel motion, the end of high-pressure gas pipe (7) is located outside furnace body (19), another pulverization end of high-pressure gas pipe (7) extends to in secondary pulverization chamber (10) for carry inert gas in secondary pulverization chamber (10).
- 2. The aluminum alloy casting production apparatus of claim 1, wherein: the punch assembly comprises a punch (1), an electric pulser (23) is arranged in the punch (1), an ignition electrode (22) is arranged at the lower end of the electric pulser (23), a high-temperature pressing block (21) is arranged on the lower side of the ignition electrode (22), the high-temperature pressing block (21) is directly contacted with the refiner mixed powder (3), the high-temperature pressing block (21) is heated through the electric pulser (23), and then the refiner mixed powder (3) is heated.
- 3. An aluminum alloy casting production apparatus according to claim 2, wherein an -th gasket (20) is provided between the punch (1) and the die case (2).
- 4. An aluminum alloy casting production apparatus as set forth in claim 2, wherein: and a punch driving device is arranged on the outer side of the furnace body (19) and is used for driving the punch (1) to move up and down.
- 5. The aluminum alloy casting production apparatus of claim 1, wherein: the extrusion heating die (6) is made of a ceramic material.
- 6. The aluminum alloy casting production apparatus of claim 1, wherein: a second sealing ring (17) is arranged between the refiner female die (4) and the secondary pulverizing die (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216660.6A CN109777982B (en) | 2019-03-21 | 2019-03-21 | Aluminum alloy casting preparation facilities |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216660.6A CN109777982B (en) | 2019-03-21 | 2019-03-21 | Aluminum alloy casting preparation facilities |
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| CN109777982A CN109777982A (en) | 2019-05-21 |
| CN109777982B true CN109777982B (en) | 2020-01-31 |
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| CN112176210B (en) * | 2020-10-17 | 2021-09-07 | 安徽诺乐知识产权服务有限公司 | Aluminum alloy casting preparation facilities |
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| KR101013207B1 (en) * | 2008-10-28 | 2011-02-10 | 고동근 | Vacuum melting device of a light metal, and method of vacuum melting using the same |
| CN107321961A (en) * | 2017-07-27 | 2017-11-07 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of aluminium alloy thin-walled casting semi solid-state forming machine of crucible furnace formula compression solidification |
| CN108188369A (en) * | 2017-11-14 | 2018-06-22 | 昆明理工大学 | A kind of semi-solid rheological molding method and device |
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Effective date of registration: 20191230 Address after: 226400 south side of Zhenxing 1st Road, Chengnan Industrial Park, juegang Town, Rudong County, Nantong City, Jiangsu Province Applicant after: Nantong hanxuan Precision Technology Co.,Ltd. Address before: 050000 Unit 602, Building 40, Unit 3, 416 Huaibei Road, Yuhua District, Shijiazhuang City, Hebei Province Applicant before: Meng Jing |
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Granted publication date: 20200131 |