CN115229195A - Nano amorphous alloy preparation device - Google Patents
Nano amorphous alloy preparation device Download PDFInfo
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- CN115229195A CN115229195A CN202210932872.6A CN202210932872A CN115229195A CN 115229195 A CN115229195 A CN 115229195A CN 202210932872 A CN202210932872 A CN 202210932872A CN 115229195 A CN115229195 A CN 115229195A
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- 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
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- 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
- B22F9/002—Making metallic powder or suspensions thereof amorphous or microcrystalline
- B22F9/008—Rapid solidification processing
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- 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
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- 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
- B22F2009/086—Cooling after atomisation
Abstract
A nanometer amorphous alloy preparation device comprises a lifting device, a sample cabin device, a cooling device, a sample collecting device and the like. The lifting device comprises a gear lifting rod and a driving gear, the driving gear is meshed with the gear lifting rod, and the gear lifting rod is lifted to drive the sample bin to lift; the sample bin device comprises a gas conveying pipe, metal wires, a sample bin shell and a spray head, wherein two continuously fed metal wires are used as consumable electrodes, electric arcs generated at the end part of the spray head are used as heat sources, and molten metal is atomized and blown out by utilizing compressed gas; the cooling device comprises cooling liquid and a gate valve; the sample collection device includes a valve, a sample collection chamber. The blown metal atomized particles fall into cooling liquid and form the nano amorphous alloy after condensation. Compared with other methods, the method is simple and easy to operate, green and pollution-free, the purity of the formed nano amorphous alloy is high, and the alloy type and the grain size can be adjusted.
Description
Technical Field
The invention relates to the field of amorphous alloy preparation, in particular to a nano amorphous alloy preparation device.
Technical Field
Amorphous alloy is a typical glass state in atomic structure, is a material with the structural characteristics of long-range disorder and short-range order, has extremely high strength, hardness and good toughness, and is often used for manufacturing reinforced fibers of tires, conveyor belts, high-pressure pipelines and the like. The current methods for preparing amorphous alloys include chemical reduction, ion implantation, and quenching, wherein quenching refers to passing molten metal or alloy through various routes by at least 10 5 -10 6 The rapid quenching of K/s completes the solidification without completing the regular arrangement of atoms in the melt, so that the disordered structure of the liquid metal is maintained to form an amorphous state, and the amorphous alloy can be easily prepared on a large scale by the method.
The specific surface of the amorphous alloy prepared by the traditional quenching method is generally small, the prepared materials are sheets, powder or thin strips, the particle size cannot be adjusted, and the reaction device is complex and has high requirements. In addition, the high-temperature alloy molten drops are easy to react with gases in the environment such as oxygen and the like to generate impurities, so that the purity of the prepared amorphous alloy is not high, and the requirement of a specific industry on the purity of the amorphous alloy cannot be met. Aiming at the problems, the invention develops a nano amorphous alloy preparation device by adjusting the height of a twin-wire arc nozzleThe particle size is controlled by the temperature, the wire feeding speed and the flow of compressed gas. The internal gas replacement of the device can be realized through the external vacuum pump and the gas delivery pipe, the internal reaction environment of the device is ensured to be an inert environment, and the molten drop is prevented from reacting with the environmental gas. Meanwhile, the gate valve is arranged above the cooling pool, unstable atomized particles in the early stage are isolated, the purity of a sample is guaranteed, different types of amorphous alloys can be obtained by adjusting the types of the metal wires, and the preparation method is simple, low in cost, easy to operate and high in cooling rate. Based on Newton's cooling law, considering the parameters of droplet speed, temperature, diameter and the like and the influence of the temperature of cooling liquid on the droplet cooling rate, simplifying the droplet into a spherical shape, deducing the cooling rate of amorphous alloy by adopting a cooling rate model (1), and deducing that the cooling rate of amorphous alloy prepared by adopting the amorphous alloy preparation device is about 10 9 -10 10 K/s, much higher than 10 5 -10 6 K/s. The cooling rate model was calculated as follows:
dT/dt＝9h(T-T s )/C p ρ(T)d 0 (1)
wherein h is the interfacial heat transfer coefficient of the droplet and the coolant, T is the droplet temperature, T s Is the temperature of the cooling liquid, C p Is the specific heat of the molten drop at constant pressure, [ rho ] (T) is the corresponding density of the molten drop at temperature T, and d 0 Is the diameter of the droplet.
Disclosure of Invention
In order to solve the problems, the invention develops a device for preparing the nano amorphous alloy. The invention provides a technical scheme for solving the technical problems as follows: a nanometer amorphous alloy preparation device comprises a lifting device, a sample cabin device, a cooling device, a sample collecting device and the like. The device comprises a gear lifting rod (1), a driving gear (2), a gas conveying pipe (3), a metal wire (4), a shell (5), an intelligent control panel (6), a vacuum pumping hole (7), cooling liquid (8), a valve (9), a sample collecting chamber (10), a valve hand wheel (11), a gate valve (12), a sample bin shell (14), a sprayer (15), a wire feeding wheel (16) and an air cap (17) nozzle (18).
Wherein, drive gear and gear lifter meshing, the gear lifter is connected with the sample storehouse, through the lift of gear lifter, drives the sample storehouse and goes up and down.
Wherein, the middle part of the spray head is connected with the sample bin, and the up-and-down movement of the sample bin drives the spray head to achieve the purpose of adjusting the height of the spray head.
The intelligent control panel is arranged at the side end of the device, and the rotating speed of the driving gear can be adjusted through the intelligent control panel, so that the lifting speed of the sample bin is controlled; the wire feed wheel speed can also be adjusted to control the wire atomization rate.
Wherein, a vacuum pumping hole is arranged at the side end of the device, and the vacuum degree of the body can be controlled at 10 by an external vacuum pump -7 ～10 -4 Pa。
Wherein, the gas delivery pipe sets up in shower nozzle middle part position, and the air intake flow is controllable, can be through adjusting the blowout rate of air intake flow adjustment metal atomized particles.
Wherein, the device lower extreme sets up the cooling bath, and the cooling bath upper end sets up the push-pull valve, and the purpose that the push-pull valve exists is isolated unstable atomizing granule in earlier stage, guarantees the purity of sample.
Wherein, a sample collecting chamber is arranged below the cooling pool, and when the amorphous alloy particles are cooled, a valve is opened to collect a sample so as to facilitate the next sample treatment.
The metal wire includes but is not limited to zinc wire, aluminum alloy wire, copper wire, niCrBSi alloy wire, and Ag-28Cu alloy.
Wherein the cooling liquid includes, but is not limited to, liquid nitrogen, liquid ammonia, ice salt bath, and water.
Wherein the pressure of the compressed gas provided by the gas conveying pipe is not less than 0.5MPa.
Wherein the wire feeding speed of the wire feeding wheel is 2-10m/min.
Wherein the diameter of the metal wire is 1-3mm, and the diameter of the air cap is 5-15mm.
Wherein the no-load voltage of the end parts of the two metal wires is 20-50V.
Wherein, the height between the spray nozzle of the spray head and the cooling liquid is 50-200mm.
The invention has the beneficial effects that:
(1) The cooling rate of the nano amorphous alloy prepared by the nano amorphous alloy preparation device is about 10 9 -10 10 K/s, much higher than 10 5 -10 6 K/s, can realize the high-efficiency and low-cost preparation of the amorphous alloy.
(2) Set up the vacuum extraction opening at the device side, can realize the inside gaseous replacement of device through external vacuum pump and gas delivery pipe, ensure that the inside reaction environment of device is inert environment, avoid molten drop and ambient gas to take place the reaction.
(3) The right side of the device is provided with an intelligent control panel, and preparation parameters are adjusted according to different conditions required by the preparation of the nano amorphous alloy, so that intelligent control is realized.
(4) The gear lifting rod is adjusted to drive the sample bin and the double-wire arc nozzle to lift, and the height of the nozzle is adjusted to adjust the particle size of the amorphous alloy particles.
(5) Set up the push-pull valve in the cooling bath top, can completely cut off unstable atomizing granule in earlier stage, treat the atomizing granule stabilization back that blows off, open the push-pull valve, can guarantee the purity of sample.
(6) And a sample collecting tank is arranged below the cooling tank to collect the nano amorphous alloy sample, so that the next step of sample treatment is facilitated.
Description of the drawings:
fig. 1 is a schematic structural diagram of a nano amorphous alloy preparation apparatus provided by the present invention.
FIG. 2 is a partially enlarged view of an apparatus for manufacturing an amorphous alloy according to the present invention.
Reference numerals are as follows:
gear lifter (1), drive gear (2), gas delivery pipe (3), wire rod (4), shell (5), intelligent control panel (6), (7) coolant liquid trades the liquid mouth, coolant liquid (8), valve (9), sample collection room (10), valve handle (11), push-pull valve (12), sample storehouse casing (14), shower nozzle (15), send silk wheel (16), air cap (17) nozzle (18).
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1-2, the present invention provides a nano amorphous alloy manufacturing apparatus, which includes a lifting device, a sample bin device, a cooling device, a sample collecting device, and the like.
The lifting device comprises a gear lifting rod 1 and a driving gear 2, the driving gear is meshed with the gear lifting rod, and the gear lifting rod is lifted to drive the sample bin to lift; the sample cabin device comprises a gas conveying pipe 3, metal wires 4, 14 sample cabin shells and a spray head 15, wherein two continuously fed metal wires are used as consumable electrodes, electric arcs are generated at the end part of the spray nozzle and used as heat sources, and molten metal is atomized and blown out by utilizing compressed gas; the cooling device comprises cooling liquid 8 and a gate valve 12; the sample collection device comprises a valve 9, a sample collection chamber 10. The blown metal atomized particles fall into cooling liquid and form the nano amorphous alloy after condensation.
When in use: selecting cooling liquid, injecting the cooling liquid into the device under the state that the gate valve is closed, and pumping the vacuum degree of the body to 10 by using an external vacuum pump -7 ～10 -4 And Pa, replacing the gas in the device for 2-3 times by combining a gas conveying pipeline. Selecting a proper metal wire, adjusting parameters of an intelligent control panel, and setting a wire feeding speed, compressed air pressure and a spray head height; turning on an equipment operation switch, starting wire feeding by a wire feeding wheel, taking two continuously fed metal wires as consumable electrodes, generating electric arcs at the end part of a 18-nozzle end as a heat source, atomizing the melted wire by using compressed air, and spraying the atomized wire at a high speed; after the sprayed atomized particles are stable, the gate valve is opened, the atomized particles are sprayed to the cooling liquid at a high speed, after the silk thread reaction is complete and the nano amorphous alloy is cooled, the valve 9 is opened, the nano amorphous alloy and the residual cooling liquid flow into the sample collection chamber 10, and the sample is transferred to be processed in the next step.
Example 1
Taking the nano amorphous NiCrBSi alloy as an example, selecting liquid nitrogen as cooling liquid, injecting the cooling liquid into the device under the state that the gate valve is closed,the vacuum degree of the body is pumped to 10 by using an external vacuum pump -4 And Pa, replacing the gas in the device for 3 times by combining the gas conveying pipeline. Setting the no-load voltage to 28V, selecting a NiCrBSi alloy wire rod with the diameter of 2mm, adjusting parameters of an intelligent control panel, and setting the wire feeding speed to be 5m/min, the compressed air pressure to be 0.5MPa and the height of the spray nozzle from the cooling liquid to be 60mm. Turning on an equipment operation switch, starting wire feeding by a wire feeding wheel, taking two continuously fed metal wires as consumable electrodes, generating electric arcs at the end part of a spray head as a heat source, atomizing the molten zinc-aluminum wire by using compressed air, and spraying at a high speed; opening a gate valve after the sprayed atomized particles are stable, spraying the atomized particles to the cooling liquid at a high speed, opening a valve after the wire reaction is complete and the nano amorphous alloy is cooled, allowing the nano amorphous NiCrBSi alloy and the residual cooling liquid to flow into a sample collection chamber, transferring the sample to be processed next step according to the NiCrBSi alloy parameters (h =9 × 10) 6 W/m 2 ·k，T＝2300K，T s ＝77.15K，C p ＝620J/kg·k，ρ(T)＝7000kg/m 3 ) Let d be 0 =200nm, calculated cooling rate of about 2.30 × 10 10 K/s。
Example 2
Taking nano amorphous Ag-28Cu alloy as an example, selecting liquid nitrogen as cooling liquid, injecting the cooling liquid into a device under the state that a gate valve is closed, and pumping the vacuum degree of a body to 10 by using an external vacuum pump -5 Pa, then replacing the gas in the device for 2 times by combining a gas conveying pipeline. Setting the no-load voltage to be 30V, selecting an Ag-28Cu alloy wire with the diameter of 1.5mm, adjusting parameters of an intelligent control panel, and setting the wire feeding speed to be 7m/min, the compressed air pressure to be 0.7MPa and the height of the spray nozzle from the cooling liquid to be 80mm. Turning on an equipment operation switch, starting wire feeding by a wire feeding wheel, taking two continuously fed metal wires as consumable electrodes, generating electric arcs at the end part of a spray head as a heat source, atomizing the molten aluminum-magnesium wire by using compressed air, and spraying at a high speed; after the sprayed atomized particles are stable, opening the gate valve, spraying the atomized particles to the cooling liquid at high speed, after the silk reaction is complete and the nano amorphous alloy is cooled, opening the valve, making the amorphous Ag-28Cu alloy and residual cooling liquid flow into the sample collection chamber, transferring the sample to a sample collection chamberThe next step of the process is carried out according to Ag-28Cu alloy parameters (h = 2521J/m) 2 ·k，T＝2298.15K，T s ＝77.15K，C p ＝30.76J/mol·k，ρ(T)＝8.78×10 3 kg/m 3 ) Suppose d 0 =200nm, calculated cooling rate of about 1.77 × 10 9 K/s。
The present invention has been described in relation to the embodiments thereof, but it is understood that various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and features of the disclosed embodiments may be used in any combination thereof unless otherwise indicated herein, and the lack of exhaustive recitation of such combinations is merely intended to serve to omit such combinations and to conserve resources. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A nano amorphous alloy preparation device is characterized by comprising: the device comprises a gear lifting rod, a driving gear, a gas conveying pipe, a metal wire, a shell, an intelligent control panel, a vacuum pumping port, cooling liquid, a valve, a sample collecting chamber, a valve hand wheel, a gate valve, a sample bin shell, a spray head, a wire feeding wheel, an air cap and a spray nozzle;
the driving gear is meshed with the gear lifting rod, the gear lifting rod is connected with the sample bin, the sample bin is driven to lift through the lifting of the gear lifting rod, the middle part of the spray head is connected with the sample bin, and the spray head is driven by the up-and-down movement of the sample bin; the gas conveying pipe is arranged in the middle of the spray head;
the intelligent control panel is arranged at the side end of the device and used for adjusting the rotating speed of the driving gear and the rotating speed of the wire feeding wheel;
the side end of the device is provided with a vacuum pumping hole for controlling the vacuum degree of the body to be 10 -7 ～10 -4 Pa; the lower end of the device is provided with a cooling pool, and the upper end of the cooling pool is provided with a gate valve; and a sample collection chamber is arranged below the cooling pool.
2. The apparatus of claim 1, wherein: the metal wires include but are not limited to zinc wires, aluminum alloy wires, copper wires, niCrBSi alloy wires, and Ag-28Cu alloys.
3. The apparatus for preparing nano amorphous alloy according to claim 1, wherein: the cooling liquid includes, but is not limited to, liquid nitrogen, liquid ammonia, ice salt bath, and water.
4. The apparatus for preparing nano amorphous alloy according to claim 1, wherein: the pressure of the compressed gas provided by the gas conveying pipe is not less than 0.5MPa.
5. The apparatus of claim 1, wherein: the wire feeding speed of the wire feeding wheel is 2-10m/min.
6. The apparatus of claim 1, wherein: the diameter of the metal wire is 1-3mm, and the diameter of the air cap is 5-15mm.
7. The apparatus of claim 1, wherein: the no-load voltage of the end parts of the two metal wires is 20-50V.
8. The apparatus of claim 1, wherein: the height between the spray nozzle of the spray head and the cooling liquid is 50-200mm.
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| CN202210932872.6A CN115229195A (en) | 2022-08-04 | 2022-08-04 | Nano amorphous alloy preparation device |
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