Device for manufacturing iron-based amorphous composite materials

Abstract

The present invention provides a device for manufacturing an iron-based amorphous composite material, comprising a smelting unit, an accumulation unit, a flow guide unit, a conveying unit, a spray unit, an atomizing unit, and a collecting unit. The smelting unit is used to smelt iron, silicon, and chromium to form a melt, and the accumulation unit is connected to the smelting unit; the flow guide unit is connected to the accumulation unit, the spray unit is connected to the conveying unit, the atomizing unit is connected to the flow guide unit and the spray unit, respectively, and the collecting unit is connected to the atomizing unit. The device sprays iron-based amorphous alloy powder into the atomizing unit via the spray unit. After the iron-based amorphous alloy melt is pulverized by the jet flow of the iron-based amorphous alloy powder, the iron-based amorphous alloy powder is fully in contact with the melt. Under the action of surface tension, the iron-based amorphous alloy melt forms a liquid film of a certain thickness on the surface of the iron-based amorphous alloy powder, and rapidly solidifies to form an iron-based amorphous composite material with a core-shell structure.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing equipment for inductive materials, and in particular to a device for manufacturing iron-based amorphous composite materials. Background Art

[0002] Iron-based amorphous alloy powder can be used to manufacture high-frequency inductors due to its excellent soft magnetic properties, and is widely used in 5G base stations, new energy industries and other fields. However, the hardness of iron-based amorphous alloy powder is relatively high, and the insulation coating treatment process is complicated, which makes the pressing of magnetic powder cores very difficult. Based on the problem that pressing is very difficult, iron-based amorphous alloy powder is usually mixed with hydroxy iron powder or iron silicon chromium powder to form a composite material. However, since the above-mentioned mixing is a physical mixing, the difficulty of reducing the pressing of magnetic powder cores is limited, and it will also cause the soft magnetic performance advantages of iron-based amorphous alloy powder to not be fully reflected, thereby affecting its application in inductors.

[0003] To solve the above technical problems, the above iron-based amorphous composite material can be prepared by an atomization process. The atomization process in the prior art generally uses a gas atomization device and a liquid atomization device, but both the gas atomization device and the liquid atomization device cannot effectively transport the alloy powder into the atomization tower to achieve composite atomization.

[0004] Therefore, there is an urgent need to develop a device for manufacturing iron-based amorphous composite materials. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for manufacturing an iron-based amorphous composite material, so as to solve the problem that the atomizing device in the prior art cannot effectively transport the alloy powder to the atomizing tower to achieve composite atomization.

[0006] problem.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a device for manufacturing an iron-based amorphous composite material, wherein the device is used to manufacture an iron-based amorphous composite material having a core-shell structure, and the device comprises:

[0009] Smelting unit, used for melting iron, silicon and chromium to form a melt;

[0010] an accumulation unit, connected to the smelting unit, and configured to accumulate the melt;

[0011] a flow guiding unit, connected to the accumulation unit, and the melt flowing out of the accumulation unit passes through the flow guiding unit;

[0012] a conveying unit, wherein the conveying unit conveys the iron-based amorphous alloy powder under an atmosphere of protective gas;

[0013] a spraying unit, connected to the conveying unit, wherein the iron-based amorphous alloy powder flowing out of the conveying unit is sprayed out at a certain speed after passing through the spraying unit;

[0014] an atomizing unit, connected to the guide unit and the ejecting unit, respectively, wherein the iron-based amorphous alloy powder ejected from the ejecting unit contacts the melt flowing out of the guide unit in the atomizing unit and is atomized to form the iron-based amorphous composite material;

[0015] A collecting unit is connected to the atomizing unit and is used to collect the iron-based amorphous composite material.

[0016] In some embodiments of the present invention, the smelting unit includes a medium frequency induction heating furnace, and a corundum crucible is provided in the medium frequency induction heating furnace.

[0017] In some embodiments of the present invention, the accumulation unit includes a tundish and a graphite crucible for fixing the tundish.

[0018] In some embodiments of the present invention, the conveying unit includes an exhaust fan and a material bin for storing the iron-based amorphous alloy powder, and the exhaust fan is connected to the material bin and the injection unit respectively.

[0019] In some embodiments of the present invention, the spray unit includes a centrifugal blade wheel and a driving member for driving the centrifugal blade wheel to rotate, the blades in the centrifugal blade wheel cooperate to form a spray port, and the spray port is connected to the atomization unit.

[0020] In some embodiments of the present invention, the angle of the injection port is 30-60°.

[0021] In some embodiments of the present invention, the speed at which the iron-based amorphous alloy powder is ejected from the centrifugal blade wheel is 20-100 m / s.

[0022] In some embodiments of the present invention, the conveying unit includes four centrifugal blade wheels or six centrifugal blade wheels.

[0023] In some embodiments of the present invention, the device further comprises a separation unit for separating the iron-based amorphous composite material, and the separation unit is connected to the collection unit.

[0024] In some embodiments of the present invention, the separation unit comprises:

[0025] a cyclone classifier, used for separating the iron-based amorphous composite material from other impurities;

[0026] a storage bin, connected to the bottom of the cyclone classifier, for storing the iron-based amorphous composite material;

[0027] The bag dust collector is connected to the top of the cyclone classifier and is used to collect impurities.

[0028] The present invention provides an apparatus for manufacturing an iron-based amorphous composite material, comprising a smelting unit, an accumulation unit, a flow guide unit, a conveying unit, a spray unit, an atomizing unit, and a collecting unit. The smelting unit is used to smelt iron, silicon, and chromium to form a melt; the accumulation unit is connected to the smelting unit and is used to accumulate the melt; the flow guide unit is connected to the accumulation unit, and the melt flowing out of the accumulation unit passes through the flow guide unit; the conveying unit conveys the iron-based amorphous alloy powder under a protective gas atmosphere; the spray unit is connected to the conveying unit, and the iron-based amorphous alloy powder flowing out of the conveying unit is sprayed out at a certain speed after passing through the spray unit; the atomizing unit is connected to the flow guide unit and the spray unit respectively, and the iron-based amorphous alloy powder sprayed from the spray unit contacts the melt flowing out of the flow guide unit in the atomizing unit, and is atomized to form the iron-based amorphous composite material; the collecting unit is connected to the atomizing unit and is used to collect the iron-based amorphous composite material. The device sprays iron-based amorphous alloy powder into the atomization unit through the injection unit. After the iron-based amorphous alloy powder jet flow crushes the iron-based amorphous alloy melt, the iron-based amorphous alloy powder is fully in contact with the melt. Under the action of surface tension, the iron-based amorphous alloy melt forms a liquid film of a certain thickness on the surface of the iron-based amorphous alloy powder, and quickly solidifies to form an iron-based amorphous composite material with a core-shell structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 A schematic structural diagram of an apparatus for manufacturing an iron-based amorphous composite material provided by one embodiment of the present invention;

[0031] Figure 2 A schematic diagram of a process for manufacturing an iron-based amorphous composite material according to an embodiment of the present invention;

[0032] Figure 3 A schematic flow chart of an apparatus for manufacturing an iron-based amorphous composite material according to another embodiment of the present invention is provided.

[0033] Description of reference numerals:

[0034] 10- Apparatus for producing iron-based amorphous composite materials;

[0035] 11- Melting unit;

[0036] 12-storage unit;

[0037] 13- diversion unit;

[0038] 14- conveying unit;

[0039] 15- injection unit;

[0040] 16- atomization unit;

[0041] 17-collection unit;

[0042] 18-Separation unit. DETAILED DESCRIPTION

[0043] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust them as needed to suit specific applications.

[0044] Secondly, it should be noted that in the description of the present invention, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0045] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] Conventional atomization processes generally employ gas atomizers and liquid atomizers, but neither can effectively transport alloy powder to an atomization tower for composite atomization. The present invention provides a device for manufacturing an iron-based amorphous composite material to address the inability of conventional atomizers to effectively transport alloy powder to an atomization tower for composite atomization. The device comprises a smelting unit, an accumulation unit, a flow guide unit, a transport unit, a spray unit, an atomization unit, and a collection unit. Among them, the smelting unit is used to smelt iron, silicon and chromium to form a melt; the accumulation unit is connected to the smelting unit and is used to accumulate the melt; the diversion unit is connected to the accumulation unit, and the melt flowing out of the accumulation unit passes through the diversion unit; the conveying unit conveys the iron-based amorphous alloy powder through the protective gas; the injection unit is connected to the conveying unit, and the iron-based amorphous alloy powder flowing out of the conveying unit is injected out at a certain speed after passing through the injection unit; the atomization unit is respectively connected to the diversion unit and the injection unit, and the iron-based amorphous alloy powder injected from the injection unit contacts with the melt flowing out of the diversion unit in the atomization unit and is atomized to form an iron-based amorphous composite material; the collection unit is connected to the atomization unit and is used to collect the iron-based amorphous composite material. The device sprays iron-based amorphous alloy powder into the atomization unit through the injection unit. After the iron-based amorphous alloy powder jet flow crushes the iron-based amorphous alloy melt, the iron-based amorphous alloy powder is fully in contact with the melt. Under the action of surface tension, the iron-based amorphous alloy melt forms a liquid film of a certain thickness on the surface of the iron-based amorphous alloy powder, and quickly solidifies to form an iron-based amorphous composite material with a core-shell structure.

[0049] Several optional implementations of the present disclosure are introduced below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following implementations are merely illustrative and not an exhaustive list. Based on these implementations, those skilled in the art may replace, splice or combine certain features or examples, which should still be regarded as the disclosed contents of the present disclosure.

[0050] The present invention provides a device for manufacturing an iron-based amorphous composite material. Figure 1-3As shown, the device 10 is used to manufacture an iron-based amorphous composite material with a core-shell structure, and includes a smelting unit 11, an accumulation unit 12, a flow guide unit 13, a conveying unit 14, a spraying unit 15, an atomization unit 16 and a collection unit 17.

[0051] The smelting unit 11 is used to smelt iron, silicon and chromium to form a melt. The smelting temperature of iron, silicon and chromium is 1600° C. to 1700° C., and the superheat degree is 100 to 200° C. Within the above temperature range, the iron, silicon and chromium can be completely melted to form a melt.

[0052] Specifically, the smelting unit may include a medium frequency induction heating furnace, and a corundum crucible is provided in the medium frequency induction heating furnace.

[0053] The accumulation unit 12 is connected to the smelting unit 11 and is used to accumulate the melt in the smelting unit 11. In some embodiments of the present invention, the accumulation unit 12 includes a tundish and a graphite crucible that secures the tundish. Because the melt has a relatively high temperature, the tundish can be made of a heat-resistant material. The manufacturing process is conventional in the art and will not be further described here.

[0054] The melt flowing out of the accumulation unit 12 will flow out through the guide unit 13 . Specifically, the guide unit 13 may be a nozzle, through which the melt is introduced into the spray unit 16 .

[0055] In order to form an iron-based amorphous composite material, in addition to the above-mentioned melt, it is also necessary to spray the core material, i.e., the iron-based amorphous alloy powder, into the atomization unit 16. Therefore, the conveying unit 14 is required to convey the iron-based amorphous alloy powder to the injection unit 15 using a protective gas. The iron-based amorphous alloy powder is then injected into the atomization unit 16 at a certain speed after being injected into the atomization unit 16 by the injection unit 15. After the silicon-chromium alloy melt is crushed by the iron-based amorphous alloy powder jet flow, the iron-based amorphous alloy powder is fully in contact with the melt. Under the action of surface tension, the iron-silicon-chromium melt forms a liquid film of a certain thickness on the surface of the iron-based amorphous alloy powder, and rapidly solidifies to form an iron-based amorphous composite material with a core-shell structure.

[0056] In some embodiments of the present invention, the conveying unit 14 includes an exhaust fan and a material bin for storing the iron-based amorphous alloy powder. The exhaust fan is connected to the material bin and the injection unit 15. A protective gas is passed between the exhaust fan and the material bin. The protective gas can be nitrogen or other inert gases, or a combination of these gases.

[0057] In some embodiments of the present invention, the spray unit 15 includes a centrifugal blade wheel and a driving member for driving the centrifugal blade wheel to rotate. Spray ports are formed between blades of the centrifugal blade wheel, and the spray ports are connected to the atomization unit.

[0058] Furthermore, the aforementioned drive element is a drive device well known to those skilled in the art, such as a motor. The width of the ejection port gradually decreases from the axis toward the outlet, until it is reduced to 2-8 mm. When the motor drives the centrifugal impeller to rotate, the iron-based amorphous alloy powder delivered by the delivery unit 14 rotates at high speed along with the centrifugal impeller. Under the action of centrifugal force, the iron-based amorphous alloy powder accelerates from the inside outward along the impeller, continuously accelerating before being ejected from the ejection port.

[0059] In some embodiments of the present invention, the angle of the jet is 30-60°. Exemplary, the angle of the jet can be, but is not limited to, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, or 60°.

[0060] The speed of the iron-based amorphous alloy powder ejected from the above-mentioned ejection port provides the iron-based amorphous alloy powder with a large impact force, which is sufficient to break up the melt, thereby causing the melt to envelop the iron-based amorphous alloy powder to form a composite material. In the embodiments provided by the present invention, the ejection speed of the iron-based amorphous alloy powder can control the flow rate of the metal melt and the yield rate of the composite material. Therefore, the ejection speed is generally controlled at 20-100 m / s. For example, the injection speed may be, but is not limited to, 20 m / s, 21 m / s, 22 m / s, 23 m / s, 24 m / s, 25 m / s, 26 m / s, 27 m / s, 28 m / s, 29 m / s, 30 m / s, 31 m / s, 32 m / s, 33 m / s, 34 m / s, 35 m / s, 36 m / s, 37 m / s, 38 m / s, 39 m / s, 40 m / s, 41 m / s, 42 m / s, 43 m / s, 44 m / s, 45 m / s, 46 m / s, 47 m / s, 48 m / s, 49 m / s, 50 m / s, 51 m / s, 52 m / s, 53 m / s, 54 m / s, 55 m / s, 56 m / s, 57 m / s, 58 m / s, 59 m / s, 60 m / s, 61 m / s, 62 m / s, 63 m / s, 64 m / s, 65 m / s, 66 m / s, 67 m / s, 68 m / s, 69 m / s, 70 m / s, 71 m / s, 72 m / s, 73 m / s, 74 m / s, 75 m / s, 76 m / s, 77 m / s, 78 m / s, 79 m / s, 9m / s, 60m / s, 61m / s, 62m / s, 63m / s, 64m / s, 65m / s, 66m / s, 67m / s, 68m / s, 69m / s, 70m / s, 71m / s, 72m / s, 73m / s, 74m / s, 75m / s, 76m / s, 77m / s, 78m / s, 79m / s, 8 0m / s, 81m / s, 82m / s, 83m / s, 84m / s, 85m / s, 86m / s, 87m / s, 88m / s, 89m / s, 90m / s, 91m / s, 92m / s, 93m / s, 94m / s, 95m / s, 96m / s, 97m / s, 98m / s, 99m / s, 100m / s.

[0061] In some embodiments of the present invention, the above-mentioned injection unit 14 may include four centrifugal blade wheels or six centrifugal blade wheels, so that the injected iron-based amorphous alloy powder has a higher speed, for example, 60-100 m / s, so that the iron-based amorphous alloy powder injected into the atomization unit 16 has a greater impact force, breaking the melt, and the melt wraps the iron-based amorphous alloy powder to form a composite material.

[0062] In a preferred embodiment of the present invention, Figure 1 As shown, two centrifugal blade wheels are respectively provided on both sides of the atomization unit 16 , and each centrifugal blade wheel is connected to a motor, and the centrifugal blade wheel is driven to rotate by the motor.

[0063] In some embodiments of the present invention, the atomization unit 16 may be an atomization tower, in which the iron-based amorphous alloy powder and the iron-silicon-chromium melt are atomized to form a composite material, which finally flows into the collection unit 17 .

[0064] Furthermore, the device also includes a separation unit 18 for separating the iron-based amorphous composite material, and the separation unit 18 is connected to the collection unit 17 .

[0065] In some embodiments of the present invention, the separation unit 18 includes a cyclone separator, a storage bin, and a bag dust collector. The cyclone classifier is used to separate the cooled iron-based amorphous composite material from other impurities, while the storage bin is connected to the bottom of the cyclone classifier and is used to store the iron-based amorphous composite material. The bag dust collector is connected to the top of the cyclone classifier and is used to collect impurities.

[0066] The following describes in detail the method for using the device provided by the present invention through specific embodiments.

[0067] Example 1

[0068] This embodiment provides a method for preparing an iron-based amorphous composite material, the method comprising the following steps:

[0069] 1) Formation of Fe-Si-Cr alloy melt

[0070] Provide 60kg of raw materials, wherein the atomic percentage of Fe, Si, and Cr in the raw materials is 82:9:9, and the purity of each is 99.9%. Put the Fe and Cr into an intermediate frequency furnace, soften the above raw materials at 1500℃, then add silicon, continue to heat up to 1600℃, maintain a superheat of 150℃, and after the raw materials are completely melted, obtain an iron-silicon-chromium alloy melt, which flows into a tundish for storage;

[0071] 2) The crushed Fe 78 Si 10 B 12 Performing a reduction treatment by a protective gas device, wherein the oxygen content of the iron-based amorphous alloy powder after the reduction treatment is 40 ppm and the particle size thereof is 25 μm;

[0072] 3) The above-mentioned iron-silicon-chromium alloy melt is injected into the atomization tower through the nozzle at a speed of 6kg / min. After the above-mentioned iron-based amorphous alloy powder is transported to the centrifugal impeller through the protective gas device, it enters the atomization tower through the nozzle with a spray angle of 35° at a speed of 40m / s, and fully contacts with the iron-silicon-chromium alloy melt. Under the action of surface tension, the iron-silicon-chromium alloy melt forms a liquid film of uniform thickness on the surface of the iron-based amorphous alloy powder, and quickly solidifies to form an iron-based amorphous composite material, and flows into the collection unit. In the atomization compounding process, the iron-silicon-chromium melt that is not compounded with the iron-based amorphous alloy powder will form fine iron-silicon-chromium alloy powder. After separation by the cyclone separator, the iron-based amorphous composite material is obtained, and finally flows into the storage bin, while the fine iron-silicon-chromium alloy powder flows into the bag dust collector.

[0073] Example 2

[0074] This embodiment provides a method for preparing an iron-based amorphous composite material, the method comprising the following steps:

[0075] 1) Formation of Fe-Si-Cr alloy melt

[0076] 60 kg of raw materials are provided, wherein the atomic percentage of Fe, Si, and Cr in the raw materials is 86:6:8, and the purity of each is 99.9%. The Fe and Cr are placed in an intermediate frequency furnace and softened at 1400°C. Then silicon is added and the temperature is continuously raised to 1700°C. A superheat of 100°C is maintained. After the raw materials are completely melted, an iron-silicon-chromium alloy melt is obtained, which is then stored in a tundish.

[0077] 2) Fe 76 Si8B 10 C2Cr4 is subjected to a rotary water atomization treatment to form a powder, and then the obtained powder is subjected to a reduction treatment by a protective gas device, and the oxygen content of the iron-based amorphous alloy powder after the reduction treatment is 50ppm and the particle size is 20μm;

[0078] 3) The above-mentioned iron-silicon-chromium alloy melt is injected into the atomization tower through the nozzle at a speed of 6kg / min. After the above-mentioned iron-based amorphous alloy powder is transported to the centrifugal impeller through the protective gas device, it enters the atomization tower through the nozzle with a spray angle of 45° at a speed of 60m / s, and fully contacts with the iron-silicon-chromium alloy melt. Under the action of surface tension, the iron-silicon-chromium alloy melt forms a liquid film of uniform thickness on the surface of the iron-based amorphous alloy powder, and quickly solidifies to form an iron-based amorphous composite material, and flows into the collection unit. Among them, during the atomization and compounding process, the iron-silicon-chromium melt that is not compounded with the iron-based amorphous alloy powder will form fine iron-silicon-chromium alloy powder. After separation by the cyclone separator, the iron-based amorphous composite material is obtained, and finally flows into the storage bin, while the fine iron-silicon-chromium alloy powder flows into the bag dust collector.

[0079] Example 3

[0080] This embodiment provides a method for preparing an iron-based amorphous composite material, the method comprising the following steps:

[0081] 1) Formation of Fe-Si-Cr alloy melt

[0082] Provide 60 kg of raw materials, wherein the atomic percentages of Fe, Si, and Cr in the raw materials are 85:5.4:9.6, and the purity of each is 99.9%. Put Fe and Cr into a medium frequency furnace, soften the above raw materials at 1550°C, then add silicon, continue to heat to 1650°C, maintain a superheat of 100°C, and after all the raw materials are melted, obtain an iron-silicon-chromium alloy melt;

[0083] 2) Fe 79 Si6B 10 P5 is subjected to vacuum gas atomization treatment to form a powder, and then the powder is subjected to reduction treatment, and the oxygen content of the iron-based amorphous alloy powder after the reduction treatment is 20 ppm and the particle size is 10 μm;

[0084] 3) The above-mentioned iron-silicon-chromium alloy melt is injected into the atomization tower through the nozzle at a speed of 6kg / min. After the above-mentioned iron-based amorphous alloy powder is transported to the centrifugal impeller through the protective gas device, it enters the atomization tower through the nozzle with a spray angle of 60° at a speed of 80m / s, and fully contacts with the iron-silicon-chromium alloy melt. Under the action of surface tension, the iron-silicon-chromium alloy melt forms a liquid film of uniform thickness on the surface of the iron-based amorphous alloy powder, and quickly solidifies to form an iron-based amorphous composite material, and flows into the collection unit. Among them, during the atomization compounding process, the iron-silicon-chromium melt that is not compounded with the iron-based amorphous alloy powder will form fine iron-silicon-chromium alloy powder. After separation by the cyclone separator, the iron-based amorphous composite material is obtained, and finally flows into the storage bin, while the fine iron-silicon-chromium alloy powder flows into the bag dust collector.

[0085] Comparative Example 1

[0086] The iron-based amorphous alloy powder in Example 1 was used as a comparative example without atomization and compounding treatment.

[0087] Comparative Example 2

[0088] The iron-based amorphous alloy powder in Example 2 was used as a comparative example without atomization and compounding treatment.

[0089] VSM test

[0090] The materials prepared in Examples 1-3 and Comparative Examples 1-2 were tested for saturation magnetization and coercive force using a vibrating sample magnetometer (VSM). The mass of the samples was approximately 20 mg, and the magnetic field test conditions of the vibrating sample magnetometer were ±2.5 T. The test results are shown in Table 1.

[0091] Resistivity test

[0092] The materials obtained in Examples 1-3 and Comparative Examples 1-2 were made into strip samples, and the resistivity at room temperature was measured using a four-probe resistivity tester. The test results are shown in Table 1.

[0093] Salt spray test

[0094] The materials prepared in Examples 1-3 and Comparative Examples 1-2 were placed in a NaCl solution at 35°C, with a mass concentration of 35% and a pH of 6.5-7.2, respectively. After soaking for 24 hours, the materials were taken out and observed to see if there were any rust spots on the surface. The test results are shown in Table 1.

[0095] Table 1

[0096] experimental group Saturation magnetization (emu / g) Coercivity (Oe) Resistivity (μΩ.cm) Corrosion resistance Example 1 170 6 120 No rust spots Example 2 165 5.5 115 No rust spots Example 3 160 5 110 No rust spots Comparative Example 1 150 3.5 140 There are rust spots Comparative Example 2 145 3.5 136 There are rust spots

[0097] It can be seen from Table 1 that compared with Comparative Example 1, Example 1 has significantly improved saturation magnetization and also has better corrosion resistance.

[0098] Compression molding test

[0099] By adding different mass fractions of silicone resin binder and pressing at 800 MPa, toroidal magnetic powder cores with an outer diameter of 14 mm and an inner diameter of 6 mm were obtained. The mass fraction of the silicone resin binder was a key indicator of the difficulty of press-forming. The lower the mass fraction of the silicone resin binder, the easier it was to press-form the magnetic powder core; otherwise, the opposite was true.

[0100] Table 2

[0101]

[0102] Note: “_” indicates unformed, and “O” indicates formed.

[0103] As can be seen from Table 2, compared with pure iron-based amorphous alloy powder and its mechanical mixture with iron-silicon-chromium powder, the iron-based amorphous composite material prepared by the device provided by the present invention has a smaller mass fraction of silicone resin binder when pressed to form magnetic powder cores, indicating that the iron-based amorphous composite material of the present invention is easier to press into shape.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for manufacturing an iron-based amorphous composite material, characterized in that: The device is used to manufacture an iron-based amorphous composite material with a core-shell structure, and the device comprises: A smelting unit (11) is used to smelt the iron-silicon-chromium alloy to 1600° C. to 1700° C. and maintain a superheat of 100° C. to 200° C. to form a melt; an accumulation unit (12), connected to the smelting unit (11), and configured to accumulate the melt; A flow guiding unit (13) is connected to the accumulation unit (12), and the melt flowing out of the accumulation unit (12) is introduced into the atomizing unit (16) through the flow guiding unit (13); A conveying unit (14), wherein the conveying unit (14) conveys the iron-based amorphous alloy powder under an atmosphere of protective gas; A spray unit (15) is connected to the conveying unit (14), and the iron-based amorphous alloy powder flowing out of the conveying unit (14) is sprayed out at a speed of 40 to 80 m / s after passing through the spray unit (15); an atomizing unit (16) which is in communication with the guide unit (13) and the spraying unit (15), respectively; wherein the melt flowing out of the guide unit (13) in the atomizing unit (16) is broken up by the iron-based amorphous alloy powder flow sprayed out of the spraying unit (15), so that the iron-silicon-chromium alloy melt forms a liquid film of uniform thickness under the action of surface tension to wrap the iron-based amorphous alloy powder, and rapidly solidifies into an iron-based amorphous composite material with a core-shell structure; a collecting unit (17), connected to the atomizing unit (16), and configured to collect the iron-based amorphous composite material; The injection unit (15) includes at least one centrifugal blade wheel and a driving member for driving the centrifugal blade wheel to rotate, the blades in the centrifugal blade wheel cooperate to form an injection port, the injection port is connected to the atomization unit, the width of the injection port gradually decreases from the axis to the outlet end to 2 to 8 mm, and the injection port angle is 35-60 degrees; When the driving member drives the centrifugal blade wheel to rotate, the iron-based amorphous alloy powder delivered by the delivery unit (14) rotates at high speed along with the centrifugal blade wheel, and accelerates from the inside to the outside along the blade under the action of centrifugal force. The iron-based amorphous alloy powder is continuously accelerated and finally ejected from the injection port.

2. The device according to claim 1, characterized in that The smelting unit (11) comprises a medium frequency induction heating furnace, in which a corundum crucible is arranged.

3. The device according to claim 1 or 2, characterized in that The accumulation unit (12) includes a tundish and a graphite crucible for fixing the tundish.

4. The device according to claim 3, characterized in that The conveying unit (12) comprises an exhaust fan and a material bin for storing the iron-based amorphous alloy powder, and the exhaust fan is connected to the material bin and the injection unit (15) respectively.

5. The device according to claim 4, characterized in that The conveying unit (14) comprises four centrifugal blade wheels or six centrifugal blade wheels.

6. The device according to claim 1, characterized in that The device further comprises a separation unit (18) for separating the iron-based amorphous composite material, and the separation unit (18) is in communication with the collection unit (17).

7. The device according to claim 6, characterized in that The separation unit (18) comprises: a cyclone classifier, used for separating the iron-based amorphous composite material from other impurities; a storage bin, connected to the bottom of the cyclone classifier, for storing the iron-based amorphous composite material; The bag dust collector is connected to the top of the cyclone classifier and is used to collect impurities.

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