Amorphous nanocrystalline magnetic material production method

Abstract

The invention discloses an amorphous nanocrystalline magnetic material production method, which relates to the technical field of amorphous nanocrystalline, and comprises the following operation steps: S1, material preparation; s2, alloy smelting, wherein the prepared raw materials are added into a vacuum induction smelting furnace according to a specific proportion; s3, single-roller rapid quenching strip manufacturing is conducted, specifically, smelted alloy liquid flows out through a nozzle at the bottom of the vacuum induction smelting furnace and is sprayed to the surface of a copper roller rotating at a high speed, and the alloy liquid is solidified into a thin strip; s4, nano-crystallization treatment: putting the prepared amorphous ribbon into a vacuum annealing furnace for annealing treatment; s5, magnetic field heat treatment, wherein after annealing treatment, the thin strip is placed in a high-intensity magnetic field environment to be subjected to heat treatment again; and S6, forming processing: winding the thin strip into an inductance coil by using a winding device. According to the production method of the amorphous and nanocrystalline magnetic material, the operation steps are simpler, the production efficiency of amorphous and nanocrystalline is higher, and the quality of the material is better.

Description

Technical Field

[0001] The present invention relates to the technical field of amorphous nanocrystals, and in particular to a method for producing amorphous nanocrystal magnetic materials. Background Art

[0002] Amorphous nanocrystalline magnetic materials are a new type of functional material that combines the structural characteristics and excellent properties of both amorphous and nanocrystalline states. These materials are typically prepared through special processes such as rapid solidification. Their atomic arrangement exhibits an amorphous structure with short-range order and long-range disorder, while nanoscale grains are evenly distributed within the amorphous matrix. This unique microstructure endows amorphous nanocrystalline magnetic materials with excellent magnetic properties such as high saturation magnetic induction intensity, low coercivity, high magnetic permeability, and low loss. This has led to their widespread application in numerous fields such as electronics, electricity, and communications. For example, they are used in the manufacture of various high-performance electronic components such as transformer cores, inductors, and magnetic heads, effectively improving the performance and efficiency of equipment and reducing energy consumption.

[0003] The existing technology for producing amorphous nanocrystalline magnetic materials has complex operating steps, low production efficiency, and low quality of the produced materials, which affects the actual application effect of the materials. In order to address the shortcomings of the existing technology, we propose a method for producing amorphous nanocrystalline magnetic materials. Summary of the Invention

[0004] The main purpose of the present invention is to provide a method for producing an amorphous nanocrystalline magnetic material, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A method for producing an amorphous nanocrystalline magnetic material includes the following steps: S1: Material preparation: high-purity iron (Fe), niobium (Nb), copper (Cu), vanadium (V), cobalt (Co), metal elements and non-metal elements such as boron (B) and silicon (Si), vacuum induction melting furnace, copper roller, vacuum annealing furnace, electromagnetic coil, winding device; S2: Alloy melting: Add the prepared raw materials into the vacuum induction melting furnace in a specific proportion; S3: Single-roller rapid quenching strip: The molten alloy flows out through the nozzle at the bottom of the vacuum induction melting furnace and is sprayed onto the surface of the high-speed rotating copper roller, causing the alloy liquid to solidify into a thin strip; S4: Nanocrystallization treatment: The prepared amorphous ribbon is placed in a vacuum annealing furnace and annealed at a temperature range of 400-600°C; S5: Magnetic field heat treatment: After annealing, the ribbon is placed in a strong magnetic field generated by an electromagnetic coil for further heat treatment. S6: Forming process: Use a winding device to wind the thin strip into an inductor coil.

[0006] Preferably, in said S1, when selecting raw materials, the raw materials need to be purified by chemical treatment and physical screening so that the purity of the raw materials reaches above 99.99%.

[0007] Preferably, in S2, the internal pressure of the vacuum induction melting furnace needs to be pumped to 10⁻ 4 Pa level, the content ratio of the raw materials is: iron (Fe) content is 67%-74.2%, niobium (Nb) content is 2.0%-3.0%, copper (Cu) content is 1.0%-1.3%, vanadium (V) content is 0.2%-1%, cobalt (Co) content is 0.1%-2.2%, silicon (Si) content is 16%-19.2%, and boron (B) content is 6.5%-8.5%. The vacuum induction melting furnace needs to heat the raw materials to 1500-1700℃ to fully melt and evenly mix them to form an alloy liquid.

[0008] Preferably, in S3, the copper roller is connected to a variable frequency speed regulating motor, the speed of the copper roller is controlled at 3000-5000 rpm, the thickness of the thin strip is 15-30 μm, and the width is 10-100 mm.

[0009] Preferably, in S4, the vacuum annealing furnace adopts a double-layer furnace structure, the inner layer is a molybdenum alloy furnace core with high temperature resistance and high vacuum performance, the outer layer is a heat insulation layer, and a resistance wire is arranged inside. The annealing treatment time is 1-3 hours.

[0010] Preferably, in said S5, the magnetic field intensity is 5-10 kOe, the heat treatment temperature is 300-400° C., and the heat treatment time is 0.5-1.5 hours.

[0011] Preferably, in said S6, during the forming process, it is necessary to use a precise stamping die or an automated winding device to perform stamping or winding processing on the thin strip.

[0012] Compared with the prior art, the present invention has the following beneficial effects: Compared with traditional production processes, the production method of the present invention optimizes some processes, and each step and parameter is easier to control, the quality of the products produced is better, and the product qualification rate is higher. The amorphous nanocrystalline magnetic material prepared by the method of the present invention has a higher magnetic permeability, which is greatly improved compared with traditional magnetic materials. When used in electromagnetic components such as transformers and inductors, it can significantly reduce hysteresis loss and improve energy transmission efficiency.

[0013] The amorphous nanocrystalline magnetic material produced by the method of the present invention has lower coercivity, requires less energy during magnetization and demagnetization, can quickly respond to changes in the external magnetic field, and can effectively reduce signal distortion and improve the high-frequency performance of the equipment when used as a magnetic component in a high-frequency circuit. The method of the present invention precisely controls the nanocrystallization and magnetic field heat treatment processes, so that the magnetic change of the material can be less affected by temperature, allowing the material to maintain stable magnetic properties under different temperature environments.

[0014] The amorphous nanocrystalline magnetic material produced by the production method of the present invention has a higher saturation magnetic induction intensity and can store more magnetic energy in a smaller volume. When used in power equipment such as motors and generators, it can effectively reduce the size and weight of the equipment and improve the power density. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall production process of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The present invention relates to a method for producing an amorphous nanocrystalline magnetic material, comprising the following steps: S1: Material preparation: high-purity iron (Fe), niobium (Nb), copper (Cu), vanadium (V), cobalt (Co), metal elements and boron (B), silicon (Si) non-metallic elements, vacuum induction melting furnace, copper roller, vacuum annealing furnace, electromagnetic coil, winding device, iron (Fe), niobium (Nb), copper (Cu), vanadium (V), cobalt (Co), boron (B), silicon (Si) and other elements need to be processed using chemical treatment and physical filtration methods including ion exchange resin method and magnetic separation method to purify the raw materials to more than 99.99% purity.

[0018] S2: Alloy smelting: Add the prepared raw materials into the vacuum induction melting furnace in a specific proportion; the proportion of raw materials is: iron (Fe) content is 67%-74.2%, niobium (Nb) content is 2.0%-3.0%, copper (Cu) content is 1.0%-1.3%, vanadium (V) content is 0.2%-1%, cobalt (Co) content is 0.1%-2.2%, silicon (Si) content is 16%-19.2%, boron (B) content is 6.5%-8.5%. The pressure inside the vacuum induction furnace needs to be pumped to 10⁻ by a mechanical pump system. 4Pa, reduces the reaction between the alloy liquid and gases such as oxygen and nitrogen during the smelting process, and at the same time, heats the temperature of the raw materials inside the vacuum induction melting furnace to 1500-1700℃ through high-frequency induction, so that the raw materials are fully melted under the action of high temperature. At the same time, the electromagnetic stirring device is used to make the alloy liquid flow, so that the elements are fully mixed to form an alloy liquid.

[0019] S3: Single-roller rapid quenching strip: The smelted alloy liquid flows out through the nozzle at the bottom of the vacuum induction melting furnace and is sprayed onto the surface of a high-speed rotating copper roller. The speed of the copper roller is precisely controlled at 3000-5000 rpm by a variable frequency speed motor. The excellent thermal conductivity of the copper roller and the huge cooling surface area formed by the high speed allow the alloy liquid to solidify into a thin strip. The thickness of the thin strip can be controlled by adjusting the distance between the nozzle and the copper roller. The thickness of the thin strip is controlled at 15-30μm, and the width of the thin strip is controlled at 10-100mm. Such a rapid solidification process can inhibit the nucleation and growth of crystals, forming an amorphous structure.

[0020] S4: Nanocrystallization treatment: The prepared amorphous nanocrystalline ribbon is placed in a vacuum annealing furnace. The vacuum annealing furnace adopts a double-layer furnace body structure. The inner layer is a molybdenum alloy furnace core with high temperature resistance and high vacuum performance, and the outer layer is a heat insulation layer. It is heated by a resistance wire. The temperature inside the vacuum annealing furnace is controlled at 400-600℃. The amorphous nanocrystalline ribbon is annealed in the temperature range of 400-600℃. The annealing time is controlled between 1-3 hours. During the annealing process, the amorphous structure will be transformed into a nanocrystalline structure. By precisely controlling the annealing temperature and time, the size of the nanocrystals can be evenly distributed in the range of 10-50nm.

[0021] S5: Magnetic field heat treatment: After annealing, amorphous materials are transformed into nanocrystals. The thin ribbon is wound into a ring-shaped sample and placed inside a thermal magnetic field treatment device. The heat treatment equipment uses a combination of resistance heating and gas protection. Heat treatment is performed again in a strong magnetic field environment generated by an electromagnetic coil to ensure that the magnetic field acts evenly on the ring-shaped sample wound with the thin ribbon. The intensity of the magnetic field is controlled at 5-10kOe, the heat treatment temperature is 300-400°C, and the heat treatment time is 0.5-1.5 hours. Under the action of the magnetic field, the magnetic domains inside the nanocrystals are affected by the magnetic field force and gradually oriented along the direction of the magnetic field, making the magnetic domain arrangement more orderly, further improving the magnetic permeability and magnetic performance stability of the amorphous nanocrystalline material.

[0022] S6: Molding: According to the actual application requirements, the processed amorphous nanocrystalline thin strips are molded and processed. A stamping device or a winding device is used to make the thin strips into transformer cores or wind them into inductor coils. During the molding process, precision molds or precision winding devices are used to ensure the dimensional accuracy and shape integrity of the components, reducing the impact on the magnetic properties of the materials.

[0023] Compared with traditional production processes, the production method of the present invention optimizes some processes, and each step and parameter is easier to control, the quality of the products produced is better, and the product qualification rate is higher. The amorphous nanocrystalline magnetic material prepared by the method of the present invention has a higher magnetic permeability, which is greatly improved compared with traditional magnetic materials. When used in electromagnetic components such as transformers and inductors, it can significantly reduce hysteresis loss and improve energy transmission efficiency.

[0024] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing an amorphous nanocrystalline magnetic material, characterized in that: The following steps are included: S1: Material preparation: high-purity iron (Fe), niobium (Nb), copper (Cu), vanadium (V), cobalt (Co), metal elements and non-metal elements such as boron (B) and silicon (Si), vacuum induction melting furnace, copper roller, vacuum annealing furnace, electromagnetic coil, winding device; S2: Alloy melting: Add the prepared raw materials into the vacuum induction melting furnace in a specific proportion; S3: Single-roller rapid quenching strip: The molten alloy flows out through the nozzle at the bottom of the vacuum induction melting furnace and is sprayed onto the surface of the high-speed rotating copper roller, causing the alloy liquid to solidify into a thin strip; S4: Nanocrystallization treatment: The prepared amorphous ribbon is placed in a vacuum annealing furnace and annealed at a temperature range of 400-600°C; S5: Magnetic field heat treatment: After annealing, the ribbon is placed in a strong magnetic field generated by an electromagnetic coil for further heat treatment. S6: Forming process: Use a winding device to wind the thin strip into an inductor coil.

2. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In S1, when selecting raw materials, the raw materials need to be purified through chemical treatment and physical screening to ensure that the purity of the raw materials reaches above 99.99%.

3. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In S2, the internal pressure of the vacuum induction melting furnace needs to be pumped down to 10⁻ 4 Pa level, the content ratio of the raw materials is: iron (Fe) content is 67%-74.2%, niobium (Nb) content is 2.0%-3.0%, copper (Cu) content is 1.0%-1.3%, vanadium (V) content is 0.2%-1%, cobalt (Co) content is 0.1%-2.2%, silicon (Si) content is 16%-19.2%, and boron (B) content is 6.5%-8.5%. The vacuum induction melting furnace needs to heat the raw materials to 1500-1700℃ to fully melt and evenly mix them to form an alloy liquid.

4. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In the S3, the copper roller is connected to a variable frequency speed regulating motor, the speed of the copper roller is controlled at 3000-5000 rpm, the thickness of the thin strip is 15-30 μm, and the width is 10-100 mm.

5. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In S4, the vacuum annealing furnace adopts a double-layer furnace structure, the inner layer is a molybdenum alloy furnace core with high temperature resistance and high vacuum performance, the outer layer is a heat insulation layer, and a resistance wire is arranged inside. The annealing treatment time is 1-3 hours, and the nanocrystal size is controlled within the range of 10-50nm.

6. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In the step S5, the magnetic field strength is 5-10 kOe, the heat treatment temperature is 300-400° C., and the heat treatment time is 0.5-1.5 hours.

7. The method for producing an amorphous nanocrystalline magnetic material according to claim 1, wherein: In the above-mentioned S6, during the forming process, it is necessary to use a precise stamping die or an automatic winding device to perform stamping or winding processing on the thin strip.

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