CN210261937U - Device for discontinuously preparing liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid slurry - Google Patents
Device for discontinuously preparing liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid slurry Download PDFInfo
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- CN210261937U CN210261937U CN201921352385.2U CN201921352385U CN210261937U CN 210261937 U CN210261937 U CN 210261937U CN 201921352385 U CN201921352385 U CN 201921352385U CN 210261937 U CN210261937 U CN 210261937U
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Abstract
The utility model provides an equipment of liquid high-silica aluminum alloy or high-silica aluminum alloy semi-solid state thick liquids is interrupted to preparation for be interrupted liquid high-silica aluminum alloy or high-silica aluminum alloy semi-solid state thick liquids of preparation, including feeding subassembly, slurrying machine, heat preservation stove, heat preservation bell, output tube and cooling device, the slurrying machine passes the heat preservation bell and stretches into in the heat preservation stove, in output tube one end stretches into the warm stove, cooling device sets up in the heat preservation stove bottom, the feeding subassembly includes silica flour feed arrangement and aluminium water feed arrangement, silica flour feed arrangement and aluminium water feed arrangement add the heat preservation stove with silica flour and aluminium liquid respectively in. The utility model discloses an equipment can realize the preparation of liquid high-silicon aluminum or high-silicon aluminum alloy semi-solid slurry fast, and not only simple structure still can improve preparation efficiency greatly, reduces the preparation cost.
Description
Technical Field
The utility model relates to the technical field of light alloy preparation technology, in particular to a device for discontinuously preparing liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid slurry.
Background
The high-silicon aluminum alloy is a binary alloy consisting of silicon and aluminum, and is a metal-based thermal management material. The high-silicon aluminum alloy material can keep the respective excellent performances of silicon and aluminum, the contents of the silicon and the aluminum are quite rich, the preparation technology of the silicon powder is mature, the cost is low, and meanwhile, the material has no pollution to the environment and is harmless to the human body. The density of the high-silicon aluminum alloy is between 2.4 and 2.7g/cm3, the Coefficient of Thermal Expansion (CTE) is between 7 and 20 ppm/DEG C, and the density and the coefficient of thermal expansion of the alloy material can be obviously reduced by increasing the content of silicon. Meanwhile, the high-silicon aluminum alloy also has the advantages of good thermal conductivity, high specific strength and rigidity, good plating performance with gold, silver, copper and nickel, weldability with a base material, easy precision machining and the like, and is an electronic packaging material with wide application prospect, in particular to the high-tech fields of aerospace, space technology, portable electronic devices and the like.
The preparation method of the existing high-silicon aluminum alloy composite material mainly comprises the following steps:
firstly, a smelting casting method:
the smelting and casting method has simple equipment and low cost, can realize large-scale industrial production, and is the most extensive preparation method of alloy materials. The high-silicon aluminum alloy cast conventionally has the defects of extremely non-uniform distribution of Si, easy generation of cracks during processing, serious component segregation, large and thick crystal grains, poor mechanical property and the like, and is difficult to carry out subsequent processing such as mechanical processing and the like. With the increase of the silicon content in the alloy, the problem is more prominent, so that the conventional casting is difficult to prepare the high-silicon aluminum alloy material.
Second, infiltration method:
the impregnation method is classified into a pressure impregnation method and a non-pressure impregnation method. The pressure infiltration method is to immerse the matrix metal melt into the reinforcing body gap by mechanical pressurization or compressed gas pressurization, and can solve the problems of incomplete infiltration and the like caused by non-wetting of the reinforcing material and the molten metal, but the application development of the pressure infiltration method is limited because a pressurization system is relatively complex.
Thirdly, powder metallurgy:
the main process of the powder metallurgy method is to uniformly disperse a certain proportion of aluminum powder, silicon powder and adhesive, mix and form the powder by methods of dry pressing, injection and the like, and finally sinter the powder in a protective atmosphere to form a compact material. The method solves the problems that the silicon particles have poor wettability with an aluminum matrix and are difficult to add into a melt, and the material can be formed at one time, less cutting processing is needed, and the defect that the metal matrix composite material is difficult to process is overcome. However, the method has the disadvantages of complex process, difficult accurate control, non-compact die shape and high cost.
Fourthly, vacuum hot pressing:
the vacuum hot pressing method is a sintering process which simultaneously carries out pressure forming and pressure sintering, and has the advantages that: (1) the powder is easy to flow plastically and densify; (2) the sintering temperature and the sintering time are short; (3) the density is high. The general process comprises the following steps: under vacuum condition, the powder is filled in a die cavity, and the powder is heated while being pressurized, so that a compact and uniform material is formed after pressurization for a short time. However, the application of the technology in the preparation of high-silicon aluminum alloy is limited due to the complex self-process and poor operability.
Fifth, rapid cooling/spray deposition:
the rapid cooling/spray deposition technology is a rapid solidification technology developed to overcome the problems of complex process, serious oxidation and the like, and is in counter balance with the technologies such as powder metallurgy and the like. This process has developed rapidly in recent years because it has incomparable advantages over other processes. Rapid cooling/spray deposition has the following advantages: (1) no macrosegregation; (2) fine and uniform equiaxed crystal microstructure; (3) a fine primary precipitate phase; (4) the oxygen content is low; (5) the hot workability is improved.
In view of the above, the present inventors have specially designed an apparatus for discontinuously preparing a liquid high silicon aluminum alloy or a high silicon aluminum alloy semi-solid slurry, which has been made by this disclosure.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the technical scheme of the utility model is as follows:
the equipment for discontinuously preparing the liquid high-silicon aluminum alloy or the high-silicon aluminum alloy semi-solid slurry by using the silicon powder comprises a feeding assembly, a pulping machine, a heat preservation furnace cover, an output pipe and a cooling device, wherein the pulping machine penetrates through the heat preservation furnace cover and extends into the heat preservation furnace, one end of the output pipe extends into the heat preservation furnace, and the cooling device is arranged at the bottom of the heat preservation furnace;
the feeding assembly comprises a silicon powder feeding device and an aluminum water feeding device, and the silicon powder feeding device and the aluminum water feeding device respectively add silicon powder and aluminum liquid into the heat preservation furnace; and a channel communicated with the silicon powder feeding device is arranged in the pulping machine.
Further, silica flour feed arrangement includes argon gas generating device, conveying pipeline, hopper, conveying pipeline one end is connected with argon gas generating device, and the other end communicates with the passageway, the hopper sets up on the conveying pipeline, hopper bottom and conveying pipeline intercommunication.
Further, the silicon powder feeding device further comprises a sealing cover matched with the hopper and a vibrator arranged on the hopper, and the conveying pipeline is inclined or vertically arranged.
Furthermore, the aluminum water feeding device comprises a feeding hole formed in the heat preservation furnace cover and an aluminum water feeding cover arranged on the feeding hole.
Furthermore, the bottom of the pulping machine and one end of the output pipe are arranged close to the bottom of the heat preservation furnace, and the cooling device adopts a cooling water ring.
Furthermore, an electromagnetic valve is arranged on the material conveying pipe and used for controlling the supply state of the argon.
Furthermore, a vent pipe is arranged on the feed delivery pipe between the hopper and the electromagnetic valve, one end of the vent pipe is connected with the feed delivery pipe, and the other end of the vent pipe is connected with the upper end of the hopper.
The utility model discloses a be interrupted the equipment of preparation liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid state thick liquids with the silicon powder, can realize the preparation of liquid high-silicon aluminum or high-silicon aluminum alloy semi-solid state thick liquids fast, not only simple structure still can improve preparation efficiency greatly, reduces the preparation cost.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the apparatus of the present invention.
Description of reference numerals:
01-holding furnace, 02-holding furnace cover, 03-pulping machine, 04-feeding component, 05-output pipe, 06-cooling device, 07-control system, 08-user end, 09-exhaust electromagnetic valve, 30-silicon powder feeding device, 31-argon generating device, 32-conveying pipe, 33-hopper, 34-sealing cover, 35-vibrator, 36-electromagnetic valve, 37-vent pipe, 40-aluminum water feeding device, 41-feeding hole and 42-aluminum water feeding cover.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, an apparatus for discontinuously preparing liquid high silicon aluminum alloy or semi-solid slurry of high silicon aluminum alloy according to a preferred embodiment of the present invention is used for discontinuously preparing liquid high silicon aluminum alloy or semi-solid slurry of high silicon aluminum alloy, and includes a feeding assembly 04, a slurrying machine 03, a holding furnace 01, a holding furnace cover 02, an output pipe 05 and a cooling device 06, the slurrying machine 03 passes through the holding furnace cover 02 and extends into the holding furnace 01, the bottom of the slurrying machine 03 is disposed near the bottom of the holding furnace 01, one end of the output pipe 05 extends into the holding furnace and is disposed near the bottom of the holding furnace 01, so as to output completely prepared mixed liquid or slurry to a user end 08, the other end of the slurry is connected to the user end 08, the cooling device 06 of the holding furnace 01 is disposed at the bottom of the holding furnace 01, the cooling device 06 employs a cooling ring, an exhaust solenoid valve, when the preparation is finished, the gas in the holding furnace 01 is exhausted.
The feeding assembly 04 comprises a silicon powder feeding device 30 and an aluminum water feeding device 40, and the silicon powder feeding device 30 and the aluminum water feeding device 40 respectively add silicon powder and aluminum liquid into the holding furnace 01.
The aluminum liquid feeding device 40 comprises a feeding hole 41 arranged on the heat preservation furnace cover 02 and an aluminum liquid feeding cover 42 arranged on the feeding hole, aluminum liquid enters the heat preservation furnace 01 through the feeding hole 41, and the aluminum liquid feeding cover 42 plays roles in protecting, preserving heat and sealing the feeding hole 41; the silicon powder feeding device 30 comprises an argon gas generating device 31, a material conveying pipe 32 and a hopper 33, one end of the material conveying pipe 32 is connected with the argon gas generating device 31, the other end of the material conveying pipe is communicated with a channel, the hopper 33 is arranged on the material conveying pipe 32, and the bottom of the hopper 33 is communicated with the material conveying pipe 32. And the silicon powder feeding device 30 also comprises a sealing cover 34 matched with the hopper 33 and a vibrator 35 arranged on the hopper 33, and the material conveying pipe 32 is obliquely or vertically arranged so as to facilitate the silicon powder to enter the heat preservation furnace 01. Preferably, an electromagnetic valve 36 is arranged on the delivery pipe 32 for controlling the supply state of argon gas, a vent pipe 37 is arranged on the delivery pipe 32 between the hopper 33 and the electromagnetic valve 36, one end of the vent pipe 37 is connected with the delivery pipe 32, and the other end of the vent pipe is connected with the upper end of the hopper 33, so that argon gas can be conveniently introduced into the hopper 33, and the feeding speed of silicon powder is improved.
The pulping machine 03 adopts an outsourcing device, a channel communicated with the silicon powder feeding device 30 is arranged in the pulping machine 03, the channel in the pulping machine 03 is communicated with the material conveying pipe 32, and the channel is a sealing channel, namely, a closed space can be formed among the silicon powder feeding device 30, the channel and the holding furnace 01. Or the pulping machine 03 can be arranged on the heat preservation furnace cover 02 independently, and the material conveying pipe 32 of the silicon powder feeding device 30 penetrates through the heat preservation furnace cover 02 and extends to be close to the bottom of the heat preservation furnace 01.
The device also comprises a control system 07 used for controlling the operation of the equipment, and the heat preservation furnace 01 control system 07 is arranged on the heat preservation furnace 01.
The equipment of the utility model utilizes the silicon powder feeding device 30 and the aluminum water feeding device 40 to feed materials respectively, and carries out pulping through the pulping machine 03; the specific preparation process comprises the following steps:
the method takes aluminum liquid and silicon powder as raw materials, wherein the silicon powder accounts for 22-70 percent of the total amount, and prepares liquid high-silicon aluminum alloy or high-silicon aluminum alloy semisolid slurry discontinuously, which comprises the following steps,
a: starting the equipment;
b: preheating the temperature of the holding furnace 01 to a specified temperature: 800 ℃ and 1230 ℃;
C. adding aluminum liquid into a holding furnace 01 through a feeding hole according to a proportion, adding silicon powder into a hopper 33, and then covering with a sealing cover 34;
D. starting the argon generating device 31, introducing argon through an inlet of the conveying pipe 32, and gradually introducing the silicon powder in the hopper 33 into the aluminum liquid through a channel of the pulping machine 03 by using the argon;
E. starting a pulping machine 03, pulping by using the pulping machine 03, forming high-silicon aluminum alloy liquid when silicon powder is fed in a certain proportion, and removing gas and slag in the alloy liquid when argon microbubbles float;
f: after the mixture is mixed for the preset time, the liquid high-silicon aluminum alloy can be directly output through the output pipe 05 to be used by a user end 08 or a cooling device 06 arranged below the heat preservation furnace 01 to work, a large amount of latent heat of crystallization is collected through the cooling device 06, and meanwhile, the pulping machine 03 still rotates at a high speed, so that not only is the liquid mass refined, but also the crystal grains formed due to the temperature reduction are refined, and the distribution of aluminum in silicon is more uniform;
g: when the temperature is reduced to the solid fraction required, the cooling device 06 is stopped and the prepared slurry is delivered to the user side 08 by pressure through the delivery pipe 05, wherein the pressure is generated by a pressure pump or a pneumatic system, and the solid fraction ranges from 0.05 to 0.5.
H: and repeating the steps of the liquid high-silicon aluminum alloy or the high-silicon aluminum alloy semi-solid slurry after the slurry in the holding furnace 01 is output.
Specifically, in the steps D and E, the argon gas generating device 31 and the pulping machine 03 can be started at the same time, or the pulping machine 03 is started in a short time after the argon gas generating device 31 is started first, and both the silicon powder and the argon gas can enter the aluminum liquid through the channel.
The semi-solid slurry is a solid-liquid mixed slurry which is obtained by intensively stirring the pulper 03 in the metal solidification process to crush dendritic crystals of the pulper 03 and uniformly suspending some approximately spherical solid-phase particles. The fluidity is good, and the alloy can be used for high-pressure casting and extrusion casting. The gas is not easy to be involved in the filling process, the forming temperature is low, the service life of the die is long, the deformation resistance is small, and the production efficiency is high; during forming, high pressure is applied to cause the solidified metal to generate plastic deformation, and the unset metal is continuously solidified under high pressure, so that the product has less shrinkage cavity and less shrinkage porosity, compact structure, higher mechanical property than that of a common casting close to a forging, can be subjected to heat treatment, has no riser feeding and high metal utilization rate. It is suitable for the production of thin and thick-wall parts and the forming of any alloy material with wide crystallization temperature interval.
To sum up, the utility model discloses a device of liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid state thick liquids is interrupted preparation with the silicon powder, can realize liquid high-silicon aluminum or high-silicon aluminum alloy semi-solid state thick liquids's preparation fast, simple structure not only still can improve preparation efficiency greatly, reduces the preparation cost.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (7)
1. The device for discontinuously preparing the liquid high-silicon aluminum alloy or the high-silicon aluminum alloy semi-solid slurry is used for discontinuously preparing the liquid high-silicon aluminum alloy or the high-silicon aluminum alloy semi-solid slurry, and is characterized by comprising a feeding assembly, a pulping machine, a heat preservation furnace cover, an output pipe and a cooling device, wherein the pulping machine penetrates through the heat preservation furnace cover and extends into the heat preservation furnace, one end of the output pipe extends into the heat preservation furnace, and the cooling device is arranged at the bottom of the heat preservation furnace;
the feeding assembly comprises a silicon powder feeding device and an aluminum water feeding device, the silicon powder feeding device and the aluminum water feeding device respectively add silicon powder and aluminum liquid into the heat preservation furnace, and a channel communicated with the silicon powder feeding device is arranged inside the pulping machine.
2. The apparatus for intermittently preparing liquid or semi-solid slurry of Si-Al alloy as claimed in claim 1, wherein the Si powder feeder comprises an argon gas generator, a feeding pipe, and a hopper, one end of the feeding pipe is connected to the argon gas generator, the other end of the feeding pipe is connected to the channel, the hopper is disposed on the feeding pipe, and the bottom of the hopper is connected to the feeding pipe.
3. The apparatus for intermittently preparing liquid high silicon aluminum alloy or semi-solid high silicon aluminum alloy slurry according to claim 2, wherein the silicon powder feeding device further comprises a sealing cover matched with the hopper and a vibrator arranged on the hopper, and the material conveying pipe is inclined or vertically arranged.
4. The apparatus for discontinuously preparing the liquid high-silicon aluminum alloy or the high-silicon aluminum alloy semi-solid slurry as claimed in claim 1, wherein the aluminum water feeding device comprises a feeding hole arranged on the cover of the heat preservation furnace and an aluminum water feeding cover arranged on the feeding hole.
5. The apparatus for discontinuously preparing the liquid high-silicon aluminum alloy or the semi-solid slurry of the high-silicon aluminum alloy according to claim 1, wherein the bottom of the pulping machine and one end of the output pipe are arranged close to the bottom of the holding furnace, and the cooling device adopts a cooling water ring.
6. The apparatus for intermittently preparing a liquid high silicon aluminum alloy or a high silicon aluminum alloy semi-solid slurry according to claim 2, wherein the delivery pipe is provided with a solenoid valve for controlling a supply state of argon gas.
7. The apparatus for intermittently preparing liquid high silicon aluminum alloy or semi-solid high silicon aluminum alloy slurry according to claim 6, wherein a vent pipe is provided on the feeding pipe between the hopper and the solenoid valve, one end of the vent pipe is connected to the feeding pipe, and the other end is connected to the upper end of the hopper.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110343917A (en) * | 2019-08-20 | 2019-10-18 | 惠州市华顺祥实业有限公司 | The technique and its equipment of interruption preparation liquid silumin or silumin semi solid slurry |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110343917A (en) * | 2019-08-20 | 2019-10-18 | 惠州市华顺祥实业有限公司 | The technique and its equipment of interruption preparation liquid silumin or silumin semi solid slurry |
CN110343917B (en) * | 2019-08-20 | 2024-02-20 | 惠州市华顺祥实业有限公司 | Process and equipment for intermittently preparing liquid high-silicon aluminum alloy or high-silicon aluminum alloy semi-solid slurry |
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