High-entropy amorphous magnetic ring with high curie point and preparation method thereof

Abstract

The application discloses a preparation method of a high-entropy amorphous magnetic ring with a high Curie point, and the high-entropy amorphous magnetic ring comprises Co 25-30%, Fe 25-30%, Ni 15-20%, Si 10-15% and B 10-15% in terms of atomic ratio. The preparation method comprises the following steps: configuring a master alloy, repeatedly melting the master alloy for multiple times by using a vacuum induction furnace under certain temperature and time, ensuring that the components of the alloy ingot are fully uniform, and then using a single-roller rapid quenching method to prepare amorphous strip in a non-vacuum environment, and rolling the amorphous strip into a magnetic ring. The amorphous nanocrystalline magnetic ring obtained by the step-by-step heat treatment mode of ordinary heat treatment and longitudinal magnetic field heat treatment has a high squareness ratio, low coercivity and high saturation magnetic induction intensity, and is suitable for the fields of high remanence ratio switches, lock type devices, high-frequency inductors, photovoltaic transformers and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of magnetic functional materials, and particularly relates to a high-entropy amorphous magnetic ring with a high Curie point and a preparation method thereof. BACKGROUND

[0002] High-entropy alloys generally refer to a kind of alloys composed of four or more main components, and the content of each component is between 5-35%. Because of its unique composition and organizational structure characteristics, it has high strength, high hardness, excellent corrosion resistance, thermal stability, wear resistance, etc., but there are few reports on soft magnetic high-entropy alloys. With the development of economy and technology, magnetic materials have become the basis of human development. Compared with traditional amorphous materials, high-entropy amorphous materials can have a higher glass transition temperature, and due to the high mixing entropy of high-entropy alloys, the atomic lattice diffusion is hindered during the heating process, which inhibits the growth of nanocrystalline grains on the amorphous matrix, plays a role in anti-crystallization, so that high-entropy amorphous materials have high thermal stability. When the high-entropy alloy composed of various ferromagnetic elements, amorphous forming elements, etc. is in amorphous form, the formed high-entropy amorphous alloy inherits the characteristics of multiple main components and the structure characteristics of short-range order of amorphous, and has excellent magnetic properties.

[0003] The traditional soft magnetic materials widely used in industry, such as silicon steel, have high saturation magnetization but also high iron loss, and the production process is complex and time-consuming; and ferrite has low high-frequency loss, high brittleness and low saturation magnetization. The amorphous soft magnetic alloy widely used at present is mainly Fe-based and Co-based amorphous alloy. Fe-based nanocrystalline soft magnetic alloy has the characteristics of high saturation magnetic induction (B S ) and high magnetic permeability (μ), but its Curie temperature is low, which limits its application in high-temperature range; Co-based alloy has low coercivity, high magnetic permeability, near-zero magnetostriction coefficient, etc., but the saturation magnetic induction strength is low, and also has the limitation of low Curie temperature, which cannot be applied in high-temperature environment. SUMMARY

[0004] In order to solve the above problems, the first object of the present application is to provide a high-entropy amorphous magnetic ring with a high Curie point. The high-entropy amorphous magnetic ring provided by the present application has a high Curie temperature, and also has high saturation magnetization, low loss and coercivity, and can be applied in high-temperature environment.

[0005] The second object of the present application is to provide a preparation method of a high-entropy amorphous magnetic ring with a high Curie point.

[0006] In order to achieve the above object, the present application adopts the following technical scheme:

[0007] The present invention discloses a high-entropy amorphous magnetic ring with a high Curie point, wherein the high-entropy amorphous magnetic ring, by atomic ratio, comprises: Co 25-30%, Fe 25-30%, Ni 15-20%, Si 10-15%, and B 10-15%.

[0008] The inventors discovered that the high-entropy amorphous magnetic ring of this invention, with Co, Fe, and Ni as the main alloys, possesses high saturation magnetization, low loss, and low coercivity. By controlling the Fe / Co ratio in the high-entropy amorphous magnetic ring to be close to the same atomic level, it was found that for ferromagnetic materials, the Curie temperature is directly proportional to the strength of ferromagnetic exchange interactions within the material. The stronger the exchange interaction, the stronger the ability of atomic spins to tend towards parallel orientation, and the higher the temperature required to disrupt the atomic arrangement through thermal motion, resulting in a higher Curie temperature. The inventors found that when the Fe / Co ratio is close to the same atomic level... At the atomic level, the exchange interaction of Fe-Co atomic pairs is stronger than that of Fe-Fe and Co-Co atomic pairs. When the Fe and Co contents in the alloy composition are close, the exchange coupling effect is significantly enhanced, leading to an increase in the Curie temperature. In addition, the present invention also incorporates metalloid elements Si and B. Through the incorporation of Si and B, the amorphous forming ability of the high-entropy alloy is effectively improved. Therefore, with the synergy of the above components, the high-entropy amorphous magnetic ring of the present invention has a high Curie temperature, while also having high saturation magnetization, low loss and coercivity, and can be applied in high-temperature environments.

[0009] In a preferred embodiment, the high-entropy amorphous magnetic ring, by atomic ratio, comprises: Co 28%, Fe 28%, Ni 19%, Si 13%, and B 12%. That is, the chemical formula of the high-entropy amorphous magnetic ring is Co. 28 Fe 28 Ni 19 Si 13 B 12 Its performance is the best.

[0010] This invention also provides a method for preparing a high-entropy amorphous magnetic ring with a high Curie point. The method involves preparing various metal raw materials according to the designed composition ratio of the high-entropy amorphous magnetic ring, melting the metal raw materials to obtain a master alloy ingot, subjecting the master alloy ingot to melt rapid quenching to obtain an amorphous high-entropy soft magnetic alloy strip, rolling the amorphous high-entropy soft magnetic alloy strip to obtain a ring-shaped magnetic core, and annealing the ring-shaped magnetic core to obtain the high-entropy amorphous magnetic ring.

[0011] The preparation method of the present invention involves first preparing a master alloy, then melting it in a vacuum induction furnace to obtain an alloy ingot with a sufficiently uniform composition, and then using melt rapid quenching to form an amorphous ribbon. The amorphous ribbon is then rolled into a magnetic ring, and a high-entropy amorphous nanocrystalline magnetic ring is obtained through a stepwise heat treatment method of ordinary heat treatment + longitudinal magnetic field heat treatment.

[0012] Preferably, pure Fe, pure Co, pure Ni, pure Si, iron boron alloy are used as metal raw materials according to the designed component proportion of high-entropy amorphous magnetic ring.

[0013] In actual operation, pure Fe, pure Co, pure Ni, pure Si are all industrial grade, and are prepared according to the atomic percentage content in the above alloy chemical formula.

[0014] Preferably, the temperature of the melting is controlled at 200-300 DEG C above the melting point of the master alloy, the holding time of single melting is 5-20 min, and the number of melting is greater than or equal to 3.

[0015] In actual operation, the raw materials prepared above are put into a vacuum induction furnace for melting, the melting temperature is controlled at 200-300 DEG C above the melting point of the master alloy, and the holding time is 5-20 min, and then the master alloy ingot is obtained by furnace cooling, and the above steps are repeated more than 3 times to ensure that the master alloy ingot is uniformly melted. After the melting is completed, the sample can be taken out after the alloy ingot is fully cooled.

[0016] Preferably, the melt rapid quenching treatment is single-roller rapid quenching treatment, and the process of the single-roller rapid quenching treatment is that the single-roller rapid quenching treatment is remelted to obtain a melt, the melt is sprayed on a copper roller, and then the amorphous high-entropy soft magnetic alloy strip is obtained, the copper roller is a water-cooled copper roller, and the rotating speed is 35-40 m / s.

[0017] In the application, the water-cooled copper roller is rotated at high speed to realize rapid cooling of the alloy, therefore, the rotating speed of the copper roller cannot be too slow, otherwise, a uniform and continuous thin strip cannot be formed, and the liquid metal cannot be rapidly cooled and crystallized.

[0018] Preferably, the width of the amorphous high-entropy soft magnetic alloy strip is less than or equal to 6.2 mm, preferably 6.0-6.2 mm, and the thickness is less than or equal to 25 μm, preferably 24-25 μm.

[0019] Preferably, the inner diameter of the ring-shaped magnetic core is 14-17 mm, the outer diameter is 19-22 mm, the mass is 6.0-6.5 g, the height of the ring-shaped magnetic core is less than or equal to 6.2 mm, and preferably 6.0-6.2 mm.

[0020] Since the ring-shaped magnetic core is rolled from the amorphous high-entropy soft magnetic alloy strip, the height of the ring-shaped magnetic ring is the width of the amorphous high-entropy soft magnetic alloy strip.

[0021] Preferably, the annealing process is carried out by first performing a normal heat treatment at a temperature of 693K to 753K, preferably 693K to 723K, for 25 to 30 minutes, and then performing a longitudinal magnetic heat treatment at a temperature of 600 to 613K for 35 to 40 minutes, wherein the magnetic field applied during the longitudinal magnetic heat treatment has a strength of 1.3 to 1.4kA / m and is parallel to the winding direction of the annular magnetic core.

[0022] In the present application, the amorphous high-entropy soft magnetic alloy strip obtained by single-roller rapid quenching is annealed to obtain an amorphous nanocrystalline structure, and the random orientation of the nanocrystalline grains produces an average value of magnetic crystal anisotropy through exchange interaction of the residual amorphous matrix, thereby causing excellent soft magnetic behavior. In the present application, a step-by-step heat treatment is used to further improve the annular magnetic core. First, a normal heat treatment is performed at a temperature below the crystallization temperature of the amorphous high-entropy soft magnetic alloy strip to release the stress generated during the preparation of the strip, eliminate stress anisotropy, and improve the amorphous stability and density. Then, annealing is performed in a longitudinal magnetic field, and the temperature of the longitudinal magnetic heat treatment is controlled to be below the Curie temperature of the amorphous phase of the amorphous high-entropy soft magnetic alloy strip. The magnetic field acts on the alloy magnetic domains to cause them to be orderly rearranged, and a rectangular hysteresis loop is generated by the movement of the magnetic domains, thereby improving the saturation magnetic induction, remanence ratio, reducing the coercivity and permeability. However, the heat treatment temperature of the magnetic field should not exceed the Curie temperature, because at this time the external magnetic field cannot adjust the internal magnetic moment. However, the heat treatment temperature of the magnetic field should not be too low, because at low temperatures the atomic activity of the magnetic core is low, and the improvement of the magnetic properties is not significant. By using the step-by-step treatment of the present application and controlling the temperature of the step-by-step treatment within the range of the present application, an amorphous nanocrystalline high-entropy magnetic ring with excellent comprehensive performance is finally obtained.

[0023] The static magnetic properties of the annealed amorphous nanocrystalline magnetic ring are detected using a soft magnetic measuring instrument.

[0024] Principles and advantages

[0025] The high-entropy amorphous magnetic ring provided by the application is mainly composed of Co, Fe and Ni, the high-entropy amorphous alloy containing the ferromagnetic elements Fe, Co and Ni has high saturation magnetization, low loss and low coercivity, the ratio of Fe / Co in the high-entropy amorphous magnetic ring is close to that of atoms, for ferromagnetic substances, the Curie temperature is proportional to the strength of the ferromagnetic exchange interaction in the material, the stronger the exchange interaction, the stronger the ability of atomic spins to align in parallel, and the higher the temperature required to disturb the atomic arrangement through thermal motion, which is manifested as a higher Curie temperature, the inventor finds that when the ratio of Fe / Co is close to that of atoms, the exchange interaction of the Fe-Co atomic pair is stronger than that of the Fe-Fe atomic pair and the Co-Co atomic pair, when the content of Fe and Co in the alloy composition is close, the exchange coupling effect is significantly enhanced, resulting in an increase in the Curie temperature, in addition, the application also incorporates metalloid elements Si and B, the incorporation of Si and B effectively improves the amorphous forming ability of the high-entropy alloy, therefore, under the synergistic effect of the above components, the high-entropy amorphous magnetic ring of the application has a high Curie temperature, and at the same time, has high saturation magnetization, low loss and low coercivity, and can be applied in high-temperature environments.

[0026] The preparation method of the application is simple, a master alloy is first prepared, and then repeatedly melted for multiple times under a certain temperature and time by using a vacuum induction furnace to ensure that the composition of the alloy ingot is fully uniform, and then a single-roller rapid quenching method is used to prepare an amorphous strip in a non-vacuum environment, the amorphous strip is coiled into a magnetic ring, and the amorphous nanocrystalline magnetic ring is obtained by a step-by-step heat treatment mode of ordinary heat treatment + longitudinal magnetic field heat treatment.

[0027] Compared with the prior art, the high-entropy amorphous nanocrystalline alloy provided by the application has a high Curie temperature, and improves the limitation that the iron-based and cobalt-based amorphous alloys cannot be applied at high temperatures. After proper heat treatment, the magnetic ring sample has a high squareness ratio, low coercivity, low loss and high saturation magnetic induction strength, and is suitable for high remanence ratio switches, lock-type devices, high-frequency inductors, photovoltaic transformers and other fields. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of a device for preparing a strip by a high-speed rotating copper roller;

[0029] Figure 2 is a schematic diagram of a strip sample obtained by a single-roller rapid quenching method;

[0030] Figure 3 is a schematic diagram of a magnetic ring sample coiled from a strip;

[0031] Figure 4 is a DSC curve of an amorphous high-entropy soft magnetic alloy strip obtained at a temperature rising rate of 10 k / min, in which the abscissa represents temperature and the ordinate represents heat release;

[0032] Figure 5 is a schematic diagram of the thermomagnetic curve of the amorphous high-entropy soft magnetic alloy strip, in which the abscissa is temperature and the ordinate is magnetization, and it can be seen from the diagram that the Curie temperature of the amorphous high-entropy soft magnetic alloy is 627 K, and due to the limitation of the test conditions, the magnetization has not yet decreased to zero at 1000 K, and it is predicted that the Curie temperature of the crystallization phase is about 1100 K;

[0033] Figure 6 is the M-H diagram of the high-entropy amorphous nanocrystalline magnetic ring in different heat treatment states under different processes of Examples 1-3, wherein, Figure 6 (a) is the magnetic hysteresis loop diagram of the high-entropy amorphous magnetic ring obtained in Example 1 at a normal heat treatment temperature of 693 K, Figure 6 (b) is the magnetic hysteresis loop diagram of the high-entropy amorphous magnetic ring obtained in Example 2 at a normal heat treatment temperature of 723 K, Figure 6 (c) is the magnetic hysteresis loop diagram of the high-entropy amorphous magnetic ring obtained in Example 3 at a normal heat treatment temperature of 753 K, in which the abscissa is magnetic field strength and the ordinate is magnetization.

[0034] Figure 7 is the M-H diagram of the amorphous nanocrystalline high-entropy soft magnetic alloy obtained in Comparative Example 2 at a normal heat treatment temperature of 633 K, in which the abscissa is magnetic field strength and the ordinate is magnetization. DETAILED DESCRIPTION

[0035] The present application will be further understood by the following specific embodiments. It should be understood by those skilled in the art that the embodiments are only used to facilitate the understanding of the present application and should not be regarded as specific limitations of the present application.

[0036] Example 1

[0037] This embodiment provides a new soft magnetic high-entropy amorphous alloy Co 28 Fe 28 Ni 19 Si 13 B 12 (at %). The magnetic ring sample preparation method comprises the following steps:

[0038] (1) batching: selecting industrial pure Fe, industrial pure Co, industrial pure Ni, industrial pure Si and ferroalloy as raw materials, and batching according to the atomic percentage content in the above alloy expression;

[0039] (2) smelting master alloy: placing the above proportioned raw materials into a vacuum induction furnace for smelting, controlling the smelting temperature at about 200℃ above the melting point of the master alloy, and keeping the temperature for 15 min, and then cooling down with the furnace to obtain a master alloy ingot, and repeating the above steps for more than 3 times to ensure uniform melting of the master alloy ingot. After smelting is completed, the sample can be taken out after the alloy ingot is fully cooled;

[0040] (3) strip preparation: the prepared master alloy ingot is re-melted and sprayed on a high-speed rotating copper roller to prepare an amorphous high-entropy soft magnetic alloy strip; the rotating speed of the copper roller is 40 m / s, the width of the obtained strip is 6.0 mm, and the thickness is 24.2 μm,

[0041] (4) magnetic ring preparation: the prepared amorphous strip is wound into a ring-shaped magnetic core;

[0042] (5) annealing treatment: the prepared amorphous magnetic ring is placed in an annealing furnace for annealing treatment. According to Figure 4 the crystallization temperature of the amorphous high-entropy soft magnetic alloy strip is 772.7 K, and therefore the temperature is kept at 693 K for 30 min. The magnetic heat treatment temperature is selected to be below the Curie temperature of the amorphous phase, and Figure 5 the Curie temperature of the amorphous high-entropy soft magnetic alloy strip is 627 K according to the thermomagnetic curve, and therefore the temperature is kept at 613 K for 40 min, and the magnetic field strength is 1.4 kA / m, and the direction is parallel to the winding direction of the magnetic core;

[0043] The performance of the amorphous nanocrystalline high-entropy alloy magnetic ring is detected by using a soft magnetic DC (AC) tester, and the obtained magnetic hysteresis loop diagram is shown in Figure 6 (a), and the detection results are shown in Table 1:

[0044] Table 1 Performance data table of the amorphous nanocrystalline high-entropy alloy magnetic ring prepared in this embodiment

[0045]

[0046] Example 2

[0047] This embodiment provides a new soft magnetic high-entropy amorphous alloy Co 28 Fe 28 Ni 19 Si 13 B 12 (at %). The magnetic ring sample preparation method comprises the following steps:

[0048] (1) batching: selecting industrial pure Fe, industrial pure Co, industrial pure Ni, industrial pure Si, and ferroalloy as raw materials, and batching according to the atomic percentage content in the above alloy expression;

[0049] (2) smelting master alloy: the above proportioned raw materials are placed in a vacuum induction furnace for smelting, the smelting temperature is controlled at about 200 ℃ above the melting point of the master alloy, and the temperature is kept for 15 min, and then the furnace is cooled to obtain a master alloy ingot. Repeat the above steps more than 3 times to ensure that the master alloy ingot is uniformly melted. After smelting is completed, the sample can be taken out after the alloy ingot is fully cooled;

[0050] (3) strip preparation: the prepared master alloy ingot is re-melted and sprayed on a high-speed rotating copper roller to prepare an amorphous high-entropy soft magnetic alloy strip; the rotating speed of the copper roller is 40 m / s, the width of the obtained strip is 6.1 mm, and the thickness is 23.9 μm,

[0051] (4) magnetic ring preparation: the prepared amorphous strip is wound into a ring-shaped magnetic core;

[0052] (5) annealing treatment: the prepared amorphous magnetic ring is placed in an annealing furnace for annealing treatment. According to Figure 4 the crystallization temperature of the amorphous high-entropy soft magnetic alloy is 772.7 K, and therefore the temperature is kept at 723 K for 30 min. The magnetic heat treatment temperature is selected to be below the Curie temperature of the amorphous phase, and Figure 5 the Curie temperature of the amorphous high-entropy soft magnetic alloy is 627 K, and therefore the temperature is kept at 613 K for 40 min, and the magnetic field strength is 1.4 kA / m, and the direction is parallel to the winding direction of the magnetic core;

[0053] The performance of the amorphous nanocrystalline high-entropy alloy magnetic ring is detected by using a soft magnetic DC (AC) tester, and the obtained magnetic hysteresis loop diagram is shown in Figure 6 (b), and the detection results are shown in Table 2:

[0054] Table 2 Performance data table of the amorphous nanocrystalline high-entropy alloy magnetic ring prepared in this embodiment

[0055]

[0056] Example 3

[0057] This embodiment provides a new soft magnetic high-entropy amorphous alloy Co 28 Fe 28 Ni 19 Si 13 B 12 (at%). The magnetic ring sample preparation method comprises the following steps:

[0058] (1) batching: selecting industrial pure Fe, industrial pure Co, industrial pure Ni, industrial pure Si and ferroboron alloy as raw materials, and batching according to the atomic percentage content in the above alloy expression;

[0059] (2) smelting master alloy: the above proportioned raw materials are placed in a vacuum induction furnace for smelting, the smelting temperature is controlled at about 200 ℃ above the melting point of the master alloy, and the temperature is kept for 15 min, and then the furnace is cooled to obtain a master alloy ingot. Repeat the above steps more than 3 times to ensure that the master alloy ingot is uniformly melted. After smelting is completed, the sample can be taken out after the alloy ingot is fully cooled;

[0060] (3) strip preparation: the prepared master alloy ingot is re-melted and sprayed on a high-speed rotating copper roller to prepare an amorphous high-entropy soft magnetic alloy strip; the rotating speed of the copper roller is 40 m / s, the width of the obtained strip is 6.1 mm, and the thickness is 24.1 μm,

[0061] (4) magnetic ring preparation: the prepared amorphous strip is wound into a ring-shaped magnetic core;

[0062] (5) annealing treatment: the prepared amorphous magnetic ring is placed in an annealing furnace for annealing treatment. According to Figure 4 , it can be known that the crystallization temperature of the amorphous high-entropy soft magnetic alloy is 772.7 K, and therefore the temperature is kept at 753 K for 30 min. The magnetic heat treatment temperature is selected below the Curie temperature of the amorphous phase, and Figure 5 the thermomagnetic curve shows that the Curie temperature of the amorphous high-entropy soft magnetic alloy is 627 K, and therefore the temperature is kept at 613 K for 40 min, and the magnetic field strength is 1.4 kA / m, and the direction is parallel to the winding direction of the magnetic core;

[0063] The performance of the amorphous nanocrystalline high-entropy alloy magnetic ring is detected by using a soft magnetic DC (AC) tester, and the obtained magnetic hysteresis loop diagram is shown in Figure 6 (c), and the detection results are shown in Table 3:

[0064] Table 3 Performance data table of the amorphous nanocrystalline high-entropy alloy magnetic ring prepared in this embodiment

[0065]

[0066] Comparative Example 1

[0067] The other conditions are the same as those in Example 1, and only the rotating speed of the copper roller in the strip preparation process is different. In the comparative example, the rotating speed is set to 30 m / s;

[0068] Since the rotating speed of the roller is low, the rapid cooling of the liquid melt is not realized, and the prepared strip is crystallized, and no amorphous strip is obtained.

[0069] Comparative Example 2

[0070] The other conditions are the same as those in Example 1, and only the annealing treatment temperature is different. The prepared amorphous magnetic ring is placed in an annealing furnace for ordinary annealing treatment, and the temperature is kept at 633 K for 30 min. When the magnetic heat treatment is performed, the temperature is kept at 613 K for 40 min, and the magnetic field strength is also 1.4 kA / m, and the direction is parallel to the winding direction of the magnetic core;

[0071] The obtained magnetic hysteresis loop is shown in Figure 7 ;

[0072] Table 4 Performance data table of the amorphous nanocrystalline high-entropy alloy magnetic ring prepared in this embodiment

[0073]

[0074] According to the data in Table 4, the saturation magnetic induction under this condition is low, the remanence ratio is not significantly improved, the coercivity obtained at this time is larger than that at 693K and 723K, and the loss is very high, so it is not as good as the results of the present application.

[0075] From the above data, it can be seen that the magnetic ring made of amorphous ribbon after step-by-step longitudinal magnetic field heat treatment has high squareness ratio and saturation magnetic induction, low coercivity, permeability and loss, and can be applied to a wider frequency range, which helps to improve the magnetic response speed and accuracy of the material, and is conducive to maintaining the stability and accuracy of the circuit. Therefore, the amorphous nanocrystalline high-entropy alloy magnetic ring can be used to make high-remanence ratio switches, lock devices, high-frequency inductors, photovoltaic transformers and the like. At the same time, the new soft magnetic high-entropy amorphous alloy provided by the present application has a high Curie temperature and can be applied to high-temperature conditions.

[0076] The above is only a specific embodiment of the present application, and it should be noted that for those skilled in the art, any changes and improvements within the spirit and principles of the present application are also included within the scope of protection of the present application.

Claims

1. A method for preparing a high-entropy amorphous magnetic ring with a high Curie point, characterized in that: The high-entropy amorphous magnetic ring is prepared by taking each metal raw material according to the designed component proportion of the high-entropy amorphous magnetic ring, melting the metal raw materials to obtain a master alloy ingot, subjecting the master alloy ingot to melt quenching treatment to obtain an amorphous high-entropy soft magnetic alloy strip, rolling the amorphous high-entropy soft magnetic alloy strip to obtain a ring-shaped magnetic core, and subjecting the ring-shaped magnetic core to annealing treatment. The annealing treatment comprises ordinary heat treatment and longitudinal magnetic heat treatment, the ordinary heat treatment is performed at a temperature of 693K-753K for 25-30min, the longitudinal magnetic heat treatment is performed at a temperature of 600-613K for 35-40min, the longitudinal magnetic heat treatment is performed at a magnetic field strength of 1.3-1.4kA / m, and the magnetic field direction of the longitudinal magnetic heat treatment is parallel to the rolling direction of the ring-shaped magnetic core. The high-entropy amorphous magnetic ring contains, by atomic percentage, Co 25-30%, Fe 25-30%, Ni 15-20%, Si 10-15%, and B 10-15%.

2. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. Pure Fe, pure Co, pure Ni, pure Si and iron boron alloy are taken as the metal raw materials according to the designed component proportion of the high-entropy amorphous magnetic ring.

3. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. The melting temperature is controlled at 200-300℃ higher than the melting point of the master alloy, the holding time of single melting is 5-20min, and the number of melting is greater than or equal to 3.

4. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. The melt quenching treatment is single-roller quenching treatment, the process of the single-roller quenching treatment comprises remelting the master alloy ingot to obtain a melt, and spraying the melt on a copper roller to obtain the amorphous high-entropy soft magnetic alloy strip, the copper roller is a water-cooled copper roller, and the rotating speed is 35-40m / s.

5. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. The width of the amorphous high-entropy soft magnetic alloy strip is less than or equal to 6.2mm, and the thickness is less than or equal to 24.5µm.

6. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. The ring-shaped magnetic core has an inner diameter of 14-17mm, an outer diameter of 19-22mm, a mass of 6.0-6.5g, and a height of less than or equal to 6.2mm.

7. The method of claim 1, wherein the high-entropy amorphous magnetic ring has a high Curie point. The high-entropy amorphous magnetic ring contains, by atomic percentage, Co 28%, Fe 28%, Ni 19%, Si 13%, and B 12%.

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