Iron-based amorphous nanocrystalline magnetically soft alloy and annealing process and manufacturing method thereof

Abstract

The invention provides an iron-based amorphous nanocrystalline soft magnetic alloy and an annealing process and a manufacturing method thereof. The annealing process comprises the steps that an amorphous strip is obtained and wound to obtain a magnetic core; in a vacuum state, transverse magnetic treatment is firstly carried out on the magnetic core to obtain a transverse magnetic core, and the transverse magnetic core is cooled to the normal temperature; and in the vacuum state, the cooled transverse magnetic core is subjected to heat treatment to obtain a heat treatment magnetic core, the heat treatment magnetic core is cooled to the normal temperature, and then the iron-based amorphous nanocrystalline soft magnetic alloy is obtained. According to the method, the pretreatment process and the transverse magnetic adding process are combined together, so that on the basis of reducing one process, the process flow is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of iron-based amorphous nanocrystalline soft magnetic alloys, and in particular to an iron-based amorphous nanocrystalline soft magnetic alloy and an annealing process and a manufacturing method thereof. Background Art

[0002] With the rapid development of computer network technology, 5G communications, electric vehicles, photovoltaic new energy, and multimedia technology, requirements for miniaturization, energy saving, and high frequency have been put forward for electronic devices, which in turn puts forward newer and higher requirements for soft magnetic materials, that is, soft magnetic materials are required to have higher magnetic permeability, lower loss, and good temperature stability.

[0003] Amorphous nanocrystalline soft magnetic alloys have high magnetic permeability, low coercivity, and excellent high-frequency soft magnetic properties. They are known as the green electronic materials of the 21st century and have received extensive attention and research from academia and the business community in recent years. In order to meet new requirements, in addition to research on iron-based amorphous alloy core materials, improving the annealing process of amorphous nanocrystalline soft magnetic alloys is also a very important approach.

[0004] In the prior art, the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy generally involves pre-treating the soft magnetic alloy core, then subjecting the pre-treated core to ordinary heat treatment, and finally applying transverse magnetization or longitudinal magnetization. That is, the process flow consists of three steps: pre-treatment, ordinary heat treatment, and applying transverse magnetization or longitudinal magnetization. The process flow is long and the processing efficiency is low. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an iron-based amorphous nanocrystalline soft magnetic alloy and its annealing process and production method, which is used to solve the technical problem that the annealing process of iron-based amorphous nanocrystalline soft magnetic alloy in the prior art needs to go through three steps: pretreatment, ordinary heat treatment and adding transverse magnetism or longitudinal magnetism, resulting in a long process flow and low processing efficiency.

[0006] In one aspect, the present invention provides an annealing process for an iron-based amorphous nanocrystalline soft magnetic alloy, comprising:

[0007] Obtaining an amorphous strip and winding it to obtain a magnetic core;

[0008] Under vacuum, the magnetic core is first subjected to transverse magnetic treatment to obtain a transverse magnetic core, and the transverse magnetic core is cooled to room temperature;

[0009] In a vacuum state, the cooled transverse magnetic core is heat-treated again to obtain a heat-treated core, and the heat-treated core is cooled to room temperature to obtain an iron-based amorphous nanocrystalline soft magnetic alloy.

[0010] The above-mentioned iron-based amorphous nanocrystalline soft magnetic alloy annealing process combines the pretreatment and transverse magnetization process together, reduces the process flow on the basis of reducing one process, and improves production efficiency; specifically, the amorphous strip is first wound to obtain a magnetic core, and then the magnetic core is first subjected to transverse magnetization treatment to obtain a transverse magnetic core, and then the cooled transverse magnetic core is heat-treated to obtain a heat-treated magnetic core, and the heat-treated magnetic core is cooled to room temperature to obtain the iron-based amorphous nanocrystalline soft magnetic alloy. The technical problem that the iron-based amorphous nanocrystalline soft magnetic alloy annealing process in the prior art needs to go through three steps: pretreatment, ordinary heat treatment, and transverse magnetization or longitudinal magnetization, resulting in a long process flow and low processing efficiency is solved.

[0011] In addition, the above-mentioned iron-based amorphous nanocrystalline soft magnetic alloy annealing process according to the present invention may also have the following additional technical features:

[0012] Furthermore, in the step of obtaining the amorphous strip and winding it to obtain the magnetic core:

[0013] The thickness of the amorphous ribbon is 12 μm-18 μm; the amorphous ribbon includes 1K107 ribbon.

[0014] Furthermore, in the step of first performing transverse magnetic treatment on the magnetic core to obtain a transverse magnetic core:

[0015] The magnetic core is first subjected to transverse magnetic treatment by using a transverse magnetic furnace, wherein the transverse magnetic furnace is a vertical transverse magnetic furnace.

[0016] Furthermore, in the step of first performing a transverse magnetization treatment on the magnetic core to obtain a transverse magnetization magnetic core, the transverse magnetization treatment method includes:

[0017] In the transverse magnetic furnace, the temperature is first raised for 60 minutes until the temperature inside the transverse magnetic furnace reaches 500°C, and then kept warm for 120 minutes to obtain a transverse magnetic core, wherein the transverse magnet is added at the beginning of the heat preservation, and the magnetic induction intensity of the transverse magnet is 1500 Gauss.

[0018] Furthermore, in the step of cooling the transverse magnetic core to room temperature:

[0019] When the temperature of the transverse magnetic core in the transverse magnetic furnace is cooled to 200° C., the transverse magnetic core is taken out of the furnace and cooled to room temperature.

[0020] Furthermore, in the step of heat-treating the cooled transverse magnetic core to obtain a heat-treated magnetic core: the heat-treatment furnace is a horizontal furnace.

[0021] Furthermore, in the step of heat treating the cooled transverse magnetic core to obtain a heat-treated magnetic core, the heat treatment method includes:

[0022] Raise the temperature in the heat treatment furnace for 60 minutes until the temperature inside the furnace reaches 420°C, and keep it at that temperature for 40 minutes;

[0023] After keeping the temperature for 40 minutes, raise the temperature for 60 minutes until the temperature in the furnace reaches 480°C, and keep the temperature for 90 minutes;

[0024] After keeping the temperature for 90 minutes, raise the temperature for 30 minutes until the temperature in the furnace reaches 515°C, and keep it for 10 minutes;

[0025] After keeping the temperature for 10 minutes, raise the temperature for 60 minutes until the temperature in the furnace reaches 557°C, and keep the temperature for 120 minutes;

[0026] After 120 minutes of heat preservation, the heat treatment furnace is withdrawn, and when the temperature is cooled to 200°C-300°C, the magnetic core is taken out of the furnace and cooled to room temperature to obtain a heat-treated magnetic core.

[0027] Furthermore, the vacuum degree of the vacuum state is -0.1Mpa.

[0028] Another aspect of the present invention provides a method for preparing an iron-based amorphous nanocrystalline soft magnetic alloy, including the above-mentioned iron-based amorphous nanocrystalline soft magnetic alloy annealing process.

[0029] Another aspect of the present invention is to provide an iron-based amorphous nanocrystalline soft magnetic alloy, which is prepared by the above-mentioned method for preparing the iron-based amorphous nanocrystalline soft magnetic alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Flow chart of the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the embodiment of the present invention;

[0031] Figure 2 This is a comparison diagram of the inductance of the magnetic core obtained by annealing a strip with a width of 10 mm using the new process and the old process in an embodiment of the present invention;

[0032] Figure 3 This is a comparison diagram of the magnetic permeabilities of the magnetic cores obtained by annealing a strip with a width of 10 mm using the new process and the old process respectively in accordance with the embodiment of the present invention;

[0033] Figure 4 This is a comparison diagram of the inductance of the magnetic core obtained by annealing a strip with a width of 20 mm using the new process and the old process in an embodiment of the present invention;

[0034] Figure 5 This is a comparison diagram of the magnetic permeabilities of the magnetic cores obtained by annealing a strip with a width of 20 mm using the new process and the old process respectively in accordance with the embodiment of the present invention;

[0035] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] In order to solve the technical problem that the annealing process of amorphous nanocrystalline soft magnetic alloy in the prior art needs to go through three links of pretreatment, ordinary heat treatment and adding transverse magnetism or longitudinal magnetism, resulting in a long process flow and low processing efficiency, the present application provides an amorphous nanocrystalline soft magnetic alloy and a preparation method thereof, by combining the pretreatment and adding transverse magnetism process together, on the basis of reducing one process, the process flow is shortened, the production time is shortened by 3h-4h, and the production efficiency is improved; specifically, the amorphous strip is first wound to obtain a magnetic core, and then the magnetic core is first subjected to transverse magnetism treatment to obtain a transverse magnetic core, and then the cooled transverse magnetic core is heat treated to obtain a heat-treated magnetic core, and the heat-treated magnetic core is cooled to room temperature, thereby obtaining an iron-based amorphous nanocrystalline soft magnetic alloy. The present application solves the technical problem that the annealing process of an iron-based amorphous nanocrystalline soft magnetic alloy in the prior art needs to go through three links of pretreatment, ordinary heat treatment and adding transverse magnetism or longitudinal magnetism, resulting in a long process flow and low processing efficiency.

[0039] Specifically, Figure 1 As shown, the iron-based amorphous nanocrystalline soft magnetic alloy annealing process of the present application includes steps S101 to S103:

[0040] S101, obtaining an amorphous strip and winding it to obtain a magnetic core.

[0041] In some optional embodiments, the amorphous ribbon includes a 1K107 ribbon; and the thickness of the amorphous ribbon is 12 μm-18 μm.

[0042] S102. Under vacuum conditions, the magnetic core is first subjected to transverse magnetic treatment to obtain a transverse magnetic core, and the transverse magnetic core is cooled to room temperature.

[0043] In some optional embodiments, the vacuum degree of the vacuum state is -0.1Mpa. A transverse magnetic furnace is used to first perform transverse magnetic treatment on the magnetic core, wherein the transverse magnetic furnace is a vertical transverse magnetic furnace. In the transverse magnetic furnace, the temperature is first raised for 60 minutes until the temperature inside the transverse magnetic furnace reaches 500°C, and then kept warm for 120 minutes to obtain a transverse magnetic core, wherein transverse magnetism is added at the beginning of heat preservation, and the magnetic induction intensity of the transverse magnetism is 1500 Gauss. When the temperature of the transverse magnetic core in the transverse magnetic furnace cools to 200°C, the transverse magnetic core is taken out of the furnace and cooled to room temperature. As a specific example, the vacuum degree of the vacuum state is -0.1Mpa.

[0044] S103. Under vacuum conditions, heat-treating the cooled transverse magnetic core again to obtain a heat-treated magnetic core, and cooling the heat-treated magnetic core to room temperature to obtain an iron-based amorphous nanocrystalline soft magnetic alloy.

[0045] In some optional embodiments, the heat treatment furnace is a horizontal furnace. The heat treatment method includes: raising the temperature in the heat treatment furnace for 60 minutes until the temperature in the furnace reaches 420°C, and keeping it warm for 40 minutes; after keeping it warm for 40 minutes, raising the temperature for 60 minutes until the temperature in the furnace reaches 480°C, and keeping it warm for 90 minutes; after keeping it warm for 90 minutes, raising the temperature for 30 minutes until the temperature in the furnace reaches 515°C, and keeping it warm for 10 minutes; after keeping it warm for 10 minutes, raising the temperature for 60 minutes until the temperature in the furnace reaches 557°C, and keeping it warm for 120 minutes; after keeping it warm for 120 minutes, the heat treatment furnace is withdrawn, and when the temperature is cooled to 200°C-300°C, the magnetic core is taken out of the furnace and cooled to room temperature to obtain a heat-treated magnetic core. As a specific example, the vacuum degree of the vacuum state is -0.1Mpa.

[0046] In order to facilitate understanding of the present invention, several embodiments of the present invention are provided below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0047] Embodiment 1

[0048] The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the first embodiment of the present invention comprises:

[0049] The magnetic core is wound with 1K107 tape with a width of 10mm and a thickness of 12-14μm. The core size is 30mm in outer diameter, 20mm in inner diameter and 10mm in height. Under a vacuum state of -0.1Mpa, the magnetic core is first subjected to transverse magnetic treatment in a vertical transverse magnetic furnace. In the transverse magnetic furnace, the temperature is first raised for 60min until the furnace temperature of the transverse magnetic furnace reaches 500℃, and then kept warm for 120min to obtain a transverse magnetic core. Transverse magnetic is added at the beginning of the heat preservation, and the magnetic induction intensity of the transverse magnetic is 1500 Gauss. When the temperature of the transverse magnetic core in the transverse magnetic furnace cools to 200℃, the transverse magnetic core is taken out of the furnace and cooled to room temperature.

[0050] Under a vacuum state of -0.1Mpa, in a heat treatment furnace, the cooled transverse magnetic core is heat treated again to obtain a heat-treated core, and the heat-treated core is cooled to room temperature to obtain an amorphous nanocrystalline soft magnetic alloy. Specifically, the heat treatment furnace adopts a horizontal furnace, and the temperature in the heat treatment furnace is raised for 60 minutes until the temperature in the furnace reaches 420°C, and then kept warm for 40 minutes; after keeping warm for 40 minutes, the temperature is raised for 60 minutes until the temperature in the furnace reaches 480°C, and then kept warm for 90 minutes; after keeping warm for 90 minutes, the temperature is raised for 30 minutes until the temperature in the furnace reaches 515°C, and then kept warm for 10 minutes; after keeping warm for 10 minutes, the temperature is raised for 60 minutes until the temperature in the furnace reaches 557°C, and then kept warm for 120 minutes; after keeping warm for 120 minutes, the heat treatment furnace is withdrawn, and when the temperature is cooled to 200°C-300°C, the magnetic core is taken out of the furnace and cooled to room temperature to obtain a heat-treated magnetic core; the heat-treated magnetic core is cooled to room temperature to obtain an amorphous nanocrystalline soft magnetic alloy.

[0051] Embodiment 2

[0052] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the second embodiment of the present invention and that in the first embodiment is that: in this embodiment: a 1K107 strip with a bandwidth of 10 mm and a thickness of 14-16 μm is used to wind a magnetic core, and the core dimensions are an outer diameter of 30 mm, an inner diameter of 20 mm, and a height of 10 mm.

[0053] Embodiment 3

[0054] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the third embodiment of the present invention and that in the first embodiment is that in the present embodiment: a 1K107 strip with a width of 10 mm and a thickness of 16-18 μm is used to wind a magnetic core, and the dimensions of the magnetic core are an outer diameter of 30 mm, an inner diameter of 20 mm, and a height of 10 mm.

[0055] Embodiment 4

[0056] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the fourth embodiment of the present invention and that in the first embodiment is that, in the present embodiment:

[0057] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 12 μm-14 μm. The core dimensions are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0058] Embodiment 5

[0059] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the fifth embodiment of the present invention and that in the first embodiment is that, in the present embodiment:

[0060] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 14 μm-16 μm. The core dimensions are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0061] Embodiment 6

[0062] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the sixth embodiment of the present invention and that in the first embodiment is that, in this embodiment:

[0063] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 16 μm-18 μm. The dimensions of the magnetic core are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0064] Comparative Example 1

[0065] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the first comparative example of the present invention and that in the first embodiment is that the preparation method in this comparative example is:

[0066] The magnetic core is wound using 1K107 tape with a bandwidth of 10 mm and a thickness of 12-14 μm. The core dimensions are an outer diameter of 30 mm, an inner diameter of 20 mm, and a height of 10 mm.

[0067] First, the magnetic core is pretreated: the pretreatment furnace is heated to 420°C for 40 minutes, kept at this temperature for 40 minutes, and then heated to 450°C for 60 minutes. After keeping at this temperature for 60 minutes, the heat treatment furnace is withdrawn, and when the temperature cools to 200°C-300°C, the magnetic core is taken out of the furnace and cooled to room temperature;

[0068] Secondly, the core is subjected to a common heat treatment process: the heat treatment furnace is heated to 420°C for 60 minutes, kept at this temperature for 40 minutes, then heated to 480°C for 60 minutes, kept at this temperature for 90 minutes, then heated to 515°C for 30 minutes, then heated to 557°C for 60 minutes, then kept at this temperature for 10 minutes, then kept at this temperature for 120 minutes, the heat treatment furnace is withdrawn, and when the temperature cools to 200°C-300°C, the core is taken out of the furnace and cooled to room temperature;

[0069] Then add transverse magnetic process: heat the transverse magnetic furnace to 500℃ for 60min, keep it warm for 120min (at the beginning of keeping warm, add 1500 Gauss transverse magnetic), and when the temperature cools to 200℃, the magnetic core is taken out of the furnace and cooled to room temperature to obtain amorphous nanocrystalline soft magnetic alloy.

[0070] Comparative Example 2

[0071] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the second comparative example of the present invention and the comparative example 1 is that:

[0072] The magnetic core is wound using 1K107 tape with a bandwidth of 10 mm and a thickness of 14-16 μm. The core dimensions are an outer diameter of 30 mm, an inner diameter of 20 mm, and a height of 10 mm.

[0073] Comparative Example 3

[0074] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the third comparative example of the present invention and the comparative example 1 is that:

[0075] The magnetic core is wound using 1K107 tape with a bandwidth of 10 mm and a thickness of 16-18 μm. The core dimensions are an outer diameter of 30 mm, an inner diameter of 20 mm, and a height of 10 mm.

[0076] Comparative Example 4

[0077] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the fourth comparative example of the present invention and the comparative example 1 is that:

[0078] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 12 μm-14 μm. The core dimensions are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0079] Comparative Example 5

[0080] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the fifth comparative example of the present invention and the comparative example 1 is that:

[0081] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 14 μm-16 μm. The core dimensions are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0082] Comparative Example 6

[0083] The difference between the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the sixth comparative example of the present invention and the comparative example 1 is that:

[0084] The magnetic core is wound using 1K107 tape with a bandwidth of 20 mm and a thickness of 16 μm-18 μm. The dimensions of the magnetic core are an outer diameter of 40 mm, an inner diameter of 25 mm, and a height of 20 mm.

[0085] In summary, as shown in Table 1, the inductance and magnetic permeability of the products prepared by the corresponding methods of Example 2 of the present method and Comparative Example 2 are measured and the relevant data are obtained, as shown in Table 1:

[0086] Table 1:

[0087]

[0088]

[0089]

[0090] Combining the above experimental data and Figure 2 and Figure 3 As shown, the magnetic core obtained by the annealing process of the embodiment of the present application has a magnetic permeability (10-100k) higher than the magnetic permeability (10-100k) of the magnetic core of the comparative example.

[0091] As shown in Table 2, the inductance and magnetic permeability of the products prepared by the corresponding methods of Example 4 and Comparative Example 4 of the present method are measured and the relevant data are obtained, as shown in Table 2:

[0092] Table 2:

[0093]

[0094]

[0095] Combining the above experimental data and Figure 4 and Figure 5 As shown, the magnetic core obtained by the annealing process of the embodiment of the present application has a magnetic permeability (10-100k) higher than the magnetic permeability (10-100k) of the magnetic core of the comparative example.

[0096] As shown in Table 3, the magnetic cores obtained by annealing the comparative example and the embodiment respectively using strips of different thicknesses of 12 μm to 18 μm have a magnetic permeability at a frequency point of 10 KHz and a magnetic permeability at a frequency point of 100 KHz, which are specifically as follows:

[0097] Table 3:

[0098]

[0099] It can be seen from Table 3 that the magnetic core annealed by the new process corresponding to the embodiment of the present application can increase the magnetic permeability by 10%-25% at a frequency point of 10KHz, and can increase the magnetic permeability by 10%-15% at a frequency point of 100KHz.

[0100] In summary, the amorphous nanocrystalline soft magnetic alloy in the above embodiment of the present invention combines the pretreatment and transverse magnetization process together, reduces the process flow on the basis of reducing one process, and improves the processing efficiency; specifically, the amorphous strip is first wound to obtain a magnetic core, and then the magnetic core is first subjected to transverse magnetization treatment to obtain a transverse magnetic core, and then the cooled transverse magnetic core is heat-treated to obtain a heat-treated magnetic core, and then cooled to obtain the amorphous nanocrystalline soft magnetic alloy. The technical problem that the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy in the prior art needs to go through three steps: pretreatment, ordinary heat treatment, and transverse magnetization or longitudinal magnetization, resulting in a long process flow and low processing efficiency is solved.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An annealing process for an iron-based amorphous nanocrystalline soft magnetic alloy, characterized in that: include: Obtaining an amorphous strip and winding it to obtain a magnetic core; Under vacuum, the magnetic core is first subjected to transverse magnetic treatment to obtain a transverse magnetic core, and the transverse magnetic core is cooled to room temperature; In a vacuum state, the cooled transverse magnetic core is heat-treated again to obtain a heat-treated core, and the heat-treated core is cooled to room temperature to obtain an iron-based amorphous nanocrystalline soft magnetic alloy.

2. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 1, characterized in that: In the steps of obtaining amorphous strip and winding it to obtain a magnetic core: The thickness of the amorphous ribbon is 12 μm-18 μm; the amorphous ribbon includes 1K107 ribbon.

3. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 1, characterized in that: In the step of first performing transverse magnetic treatment on the magnetic core to obtain a transverse magnetic core: The magnetic core is first subjected to transverse magnetic treatment by using a transverse magnetic furnace, wherein the transverse magnetic furnace is a vertical transverse magnetic furnace.

4. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 3, characterized in that: In the step of first performing a transverse magnetization treatment on the magnetic core to obtain a transverse magnetization magnetic core, the transverse magnetization treatment method includes: In the transverse magnetic furnace, the temperature is first raised for 60 minutes until the temperature inside the transverse magnetic furnace reaches 500°C, and then kept warm for 120 minutes to obtain a transverse magnetic core, wherein the transverse magnet is added at the beginning of the heat preservation, and the magnetic induction intensity of the transverse magnet is 1500 Gauss.

5. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 4, characterized in that: In the step of cooling the transverse magnetic core to room temperature: When the temperature of the transverse magnetic core in the transverse magnetic furnace is cooled to 200° C., the transverse magnetic core is taken out of the furnace and cooled to room temperature.

6. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 1, characterized in that: In the step of heat treating the cooled transverse magnetic core to obtain a heat-treated magnetic core: The heat treatment furnace is a horizontal furnace.

7. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 6, characterized in that: In the step of heat treating the cooled transverse magnetic core to obtain a heat-treated magnetic core, the heat treatment method includes: Raise the temperature in the heat treatment furnace for 60 minutes until the temperature inside the furnace reaches 420°C, and keep it at that temperature for 40 minutes; After keeping the temperature for 40 minutes, raise the temperature for 60 minutes until the temperature in the furnace reaches 480°C, and keep the temperature for 90 minutes; After keeping the temperature for 90 minutes, raise the temperature for 30 minutes until the temperature in the furnace reaches 515°C, and keep it for 10 minutes; After keeping the temperature for 10 minutes, raise the temperature for 60 minutes until the temperature in the furnace reaches 557°C, and keep the temperature for 120 minutes; After 120 minutes of heat preservation, the heat treatment furnace is withdrawn, and when the temperature is cooled to 200°C-300°C, the magnetic core is taken out of the furnace and cooled to room temperature to obtain a heat-treated magnetic core.

8. The annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy according to claim 1, characterized in that: The vacuum degree of the vacuum state is -0.1Mpa.

9. A method for preparing an iron-based amorphous nanocrystalline soft magnetic alloy, characterized in that: The invention comprises the annealing process of the iron-based amorphous nanocrystalline soft magnetic alloy as described in any one of claims 1 to 8.

10. An iron-based amorphous nanocrystalline soft magnetic alloy, characterized in that: The iron-based amorphous nanocrystalline soft magnetic alloy is prepared by the method for preparing the iron-based amorphous nanocrystalline soft magnetic alloy as described in claim 9 above.

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