Preparation method and device of partially crystallized soft magnetic alloy strip and iron core

Abstract

The present invention provides a method and apparatus for preparing a partially crystallized soft magnetic alloy strip and an iron core. The method comprises: advancing an amorphous alloy strip along a preset direction n; applying tensile stress to a heat treatment section in the preset direction n; providing a constant temperature environment for the heat treatment section; and passing an electric current through the heat treatment section during the advancement of the amorphous alloy strip. The technical solution of the present invention allows the amorphous alloy strip to rapidly crystallize under the combined effects of ambient temperature and Joule heating, i.e., external conductive heating and self-heating of the strip itself. This facilitates grain control, grain refinement, and uniformity of the nanocrystalline structure, thereby improving both production efficiency and toughness. This method addresses the problems of high magnetic permeability, high brittleness, and low production efficiency of partially crystallized soft magnetic alloy strips prepared in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of soft magnetic materials, and in particular to a method and device for preparing a partially crystallized soft magnetic alloy strip and an iron core. Background Art

[0002] In the field of metallic soft magnetic materials, amorphous and nanocrystalline soft magnetic alloys are finding increasing application, while also facing increasingly demanding requirements. Current transformers and common-mode inductors with DC bias resistance, as well as high-frequency transformers and energy storage inductors operating under high current conditions, all require soft magnetic alloys that combine low permeability, low coercivity, low remanence ratio, and low losses. For example, DC-resistant current transformers require a core with a permeability between 500 and 2000 and excellent hysteresis loop linearity; high-frequency transformers require a core with a permeability between 200 and 1000 and very low high-frequency losses; and energy storage inductors require a permeability between 60 and 500 and a very low remanence ratio. Currently, commonly used soft magnetic materials that meet these requirements include cobalt-based amorphous alloys, iron-based partially crystallized alloys, and metal powder cores, but each has its own advantages and disadvantages. Among them, cobalt-based amorphous alloys contain expensive cobalt elements, which are costly and not conducive to popularization; the magnetic permeability of metal magnetic powder cores is relatively low, and their application is limited; while iron-based partially crystallized alloys are low in cost, and their magnetic permeability can be adjusted over a large range through heat treatment processes, and their application is becoming increasingly widespread.

[0003] Iron-based partially crystallized alloys can be divided into two categories: partially crystallized nanocrystalline alloys, with an average grain size less than 50 nanometers and a volume fraction greater than 50% composed of crystals; and partially crystallized amorphous alloys, with an average grain size greater than 100 nanometers and a volume fraction less than 50% composed of crystals. Iron-based nanocrystalline alloys have been widely used in magnetic devices such as high-frequency transformers, common-mode inductors, and current transformers; iron-based partially crystallized amorphous alloys have been used in automotive audio filter inductors. Partially crystallized soft magnetic alloys are obtained by heat treating the original amorphous alloy. One method involves winding the alloy around an iron core and then heat treating it. Conventional heat treatment can achieve high permeabilities greater than 10,000 for FeCuNbSiB alloys, but permeabilities below 10,000 are difficult to achieve. Conventional heat treatment in a magnetic field can achieve permeabilities of less than 10,000 but greater than 4,000 for Fe(CoNi)CuNbSiB alloys containing small amounts of cobalt and nickel, but this still falls short of meeting the requirements for even lower permeabilities. Another method is to first perform conventional heat treatment on the strip alloy under tension, and then wind the core. This heat treatment process can make the iron-based nanocrystalline alloy core obtain a magnetic permeability of less than 4000. However, conventional heat treatment uses an external heat source to heat the moving strip through heat conduction, which cannot achieve rapid heating and promote rapid crystallization. As a result, the treated nanocrystalline alloy strip is brittle, making it difficult to achieve automatic winding of the core. In addition, the travel speed is slow, affecting production efficiency and keeping the cost high.

[0004] Therefore, it is urgent for those skilled in the art to provide a method and apparatus for preparing a low-permeability soft magnetic alloy with high production efficiency. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method and apparatus for preparing a partially crystallized soft magnetic alloy strip and an iron core, so as to solve the problems of high magnetic permeability and high brittleness of the partially crystallized soft magnetic alloy strip prepared in the prior art.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, a method for preparing a partially crystallized soft magnetic alloy strip is provided, comprising: causing an amorphous strip alloy to travel along a preset direction n, with a travel speed between 2 m / min and 30 m / min; the amorphous strip alloy comprises a feeding section, a heat treatment section and a discharging section in the preset direction n, applying tensile stress to the heat treatment section in the preset direction n, with the tensile stress being between 5 MPa and 500 MPa; providing a constant temperature environment for the heat treatment section, with the ambient temperature being between 100°C and 500°C; during the travel of the amorphous strip alloy, passing an electric current through the heat treatment section, wherein the current direction is the preset direction n, with the current density being between 10 A / mm 2 -50A / mm 2 between.

[0007] In one embodiment, two electrodes are brought into contact with the amorphous alloy ribbon, with the amorphous alloy ribbon between the two electrodes forming a heat treatment section.

[0008] In one embodiment, the preparation method further comprises: adding at least one magnetic field in the heat treatment section, wherein the direction of the magnetic field is within the plane where the amorphous ribbon alloy is located and is perpendicular to the preset direction n.

[0009] In one embodiment, the two electrodes are a first electrode close to the feeding section and a second electrode close to the discharging section, and the preparation method further includes: correcting the amorphous strip alloy on the second electrode so that the amorphous strip alloy remains in contact with the second electrode.

[0010] In one embodiment, the plane where the first electrode axis L1 of the first electrode and the second electrode axis L2 of the second electrode are located is used as a reference plane, and the angle between the second electrode axis L2 and the first electrode axis L1 in the reference plane is changed to correct the deviation of the amorphous ribbon alloy.

[0011] In one embodiment, the preparation method further includes: online real-time measurement of the magnetic performance parameters of the discharge section; determining the deviation of the magnetic performance parameters from a preset value, and adjusting the process parameters of the current heat treatment process according to the deviation value to keep the performance of the discharge section stable within the required range.

[0012] In one embodiment, the process parameters of the current heat treatment process include adjusting at least one of the current density of the applied current, the tensile stress of the applied tension, the travel speed of the amorphous ribbon alloy, and the ambient temperature of the constant temperature environment.

[0013] According to another aspect of the present invention, a method for preparing an iron core is provided, comprising: preparing a partially crystallized soft magnetic alloy strip, the method for preparing the partially crystallized soft magnetic alloy strip being the above method; and winding the partially crystallized soft magnetic alloy strip to form an iron core.

[0014] In one embodiment, the preparation method also includes: online real-time measurement of the inductance value of a single turn or multiple turns of the iron core; judging the deviation between the current single turn inductance or multiple turn inductance of the iron core and a preset value, and adjusting the process parameters of the current heat treatment process according to the deviation value to keep the performance of the discharge section stable within the required range.

[0015] In one embodiment, the process parameters of the current heat treatment process include adjusting at least one of the current density of the applied current, the tensile stress of the applied tension, the travel speed of the amorphous ribbon alloy, and the ambient temperature of the constant temperature environment.

[0016] In one embodiment, the preparation method also includes: online real-time measurement of the inductance value of a single turn or multiple turns of the iron core; judging the deviation between the current single-turn inductance or multiple-turn inductance of the iron core and a preset value, and adjusting the number of winding layers of the wound iron core according to the deviation value to maintain consistent performance of the prepared iron core.

[0017] In one embodiment, between preparing the partially crystallized soft magnetic alloy ribbon and winding the partially crystallized soft magnetic alloy ribbon, the preparation method further comprises: coating an insulating layer on at least one side of the partially crystallized soft magnetic alloy ribbon.

[0018] According to another aspect of the present invention, a device for preparing a partially crystallized soft magnetic alloy strip is provided, comprising: a conveying device for conveying an amorphous strip alloy along a preset direction n, the amorphous strip alloy comprising a feeding section, a heat treatment section and a discharging section in the preset direction n; a tension adjustment mechanism for adjusting the tensile stress of the heat treatment section; a constant temperature environment furnace, at least part of the heat treatment section is located in the constant temperature environment furnace, and the constant temperature environment furnace can heat the heat treatment section; and a power supply device in contact with the heat treatment section to pass current through the heat treatment section.

[0019] In one embodiment, the power supply device includes: a first electrode close to the feeding section and a second electrode close to the discharging section, which are arranged at intervals of n along a preset direction, the amorphous strip alloy is in contact with the first electrode and the second electrode, and the amorphous strip alloy between the first electrode and the second electrode forms a heat treatment section; a current input device, which is electrically connected to the first electrode and the second electrode, and the current input device can change the current size.

[0020] In one embodiment, the plane where the first electrode axis L1 of the first electrode and the second electrode axis L2 of the second electrode are located is used as a reference plane, the second electrode is a pivotally hinged electrode roller, and the preparation device also includes: a correction device, which is pivotally driven and connected to the second electrode axis L2, and the correction device drives the second electrode axis L2 to swing within the reference plane.

[0021] In one embodiment, the preparation device further includes: a sensor for detecting whether the amorphous strip alloy is located at a preset position, and the sensor is electrically connected or communicatively connected to the deviation correction device.

[0022] In one embodiment, the preparation device further includes: a magnetic field generating device located between the first electrode and the second electrode, the magnetic field generating device generates at least one magnetic field, the direction of the magnetic field being perpendicular to a preset direction n in the plane where the amorphous strip alloy is located.

[0023] In one embodiment, the preparation device also includes: a first detection device for detecting the magnetic performance parameters of the discharge section; a first control device, the first detection device is communicatively connected or electrically connected to the first control device, and at least one of the conveying device, the tension adjustment mechanism, the constant temperature environment furnace and the current input device is electrically connected or communicatively connected to the first control device.

[0024] In one embodiment, the conveying device includes two sets of roller transmission devices arranged at intervals along a preset direction n in the feeding section and the discharging section. The roller transmission device includes two rollers arranged one above the other, and the amorphous strip alloy is clamped by the two rollers.

[0025] In one embodiment, the tension adjustment mechanism includes two fixed rollers arranged at intervals along a preset direction n in the feeding section and a movable roller located between the two fixed rollers in the preset direction n, a counterweight is suspended below the movable roller, the movable roller can move up and down, and the amorphous strip alloy contacts the upper surface of the fixed roller and the lower surface of the movable roller.

[0026] In one embodiment, the preparation device further comprises: a material tray located before the conveying device, and the amorphous strip alloy is wound on the material tray.

[0027] According to the last aspect of the present invention, a device for preparing an iron core is provided, comprising: a device for preparing a partially crystallized soft magnetic alloy strip, the device for preparing the partially crystallized soft magnetic alloy strip being the above-mentioned device; a winding device, located on the rear side of the device for preparing the partially crystallized soft magnetic alloy strip, the winding device winding the partially crystallized soft magnetic alloy strip prepared by the device for preparing the partially crystallized soft magnetic alloy strip to form an iron core.

[0028] In one embodiment, the iron core preparation device also includes: a second detection device, which detects the inductance value of a single turn or multiple turns of the iron core; a second control device, the second detection device is communicatively connected or electrically connected to the second control device, and at least one of the conveying device, tension adjustment mechanism, constant temperature environment furnace and current input device of the partially crystallized soft magnetic alloy strip preparation device is electrically connected or communicatively connected to the second control device.

[0029] In one embodiment, the iron core preparation device also includes: a second detection device, detecting the inductance value of a single turn or multiple turns of the iron core; a second control device, the second detection device is communicatively connected or electrically connected to the second control device, and the winding device is electrically connected or communicatively connected to the second control device.

[0030] In one embodiment, the core preparation device further includes: an insulating layer coating device, which is arranged between the partially crystallized soft magnetic alloy strip preparation device and the winding device.

[0031] The technical solution of the present invention is applied. When an electric current is applied to the traveling amorphous alloy strip (amorphous ribbon alloy), Joule heat is generated inside the amorphous alloy strip. This self-heating method of the body can achieve rapid temperature rise and promote rapid crystallization, so the travel speed is fast, the production efficiency is high, and brittleness is reduced. Then, a higher constant temperature ambient temperature is provided by an external heating device, so that the amorphous alloy strip is under the combined action of ambient temperature and Joule heat effect, that is, the combined action of external conduction heating and body self-heating, which realizes the rapid crystallization of amorphous alloy, and is also beneficial to grain control, grain refinement and the uniformity of nanocrystalline structure, not only improving production efficiency, but also improving toughness. In addition, while the current passes through the amorphous alloy strip, an induced magnetic field is also generated in the direction perpendicular to the current, which promotes transverse induced anisotropy. While the current passes through the amorphous alloy strip, a tensile force is applied to the amorphous alloy strip along the travel direction (preset direction n), and the tensile stress generated thereby promotes creep induced anisotropy. Both magnetic field-induced anisotropy and creep-induced anisotropy contribute to reducing the magnetic permeability of the partially crystallized alloy after current heat treatment. Therefore, the partially crystallized soft magnetic alloy ribbon prepared using the above preparation method can have low magnetic permeability and low brittleness, facilitating subsequent winding of the iron core.

[0032] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 A schematic flow chart showing an embodiment of a method for preparing an iron core according to the present invention is shown;

[0035] Figure 2 A test report showing an embodiment of the method for preparing an iron core according to the present invention is shown, wherein Figure 2 The static hysteresis loop and basic magnetization curve are shown;

[0036] Figure 3 A test report showing an embodiment of the method for preparing an iron core according to the present invention is shown, wherein Figure 3 The basic magnetization curve and the magnetic permeability curve (static) are shown;

[0037] Figure 4 A schematic structural diagram of an embodiment of a device for preparing an iron core according to the present invention is shown;

[0038] Figure 5 Shown Figure 4 A schematic front view of a partial structure of an iron core preparation device; and

[0039] Figure 6 Shown Figure 5 A schematic top view of a partial structure of an iron core preparation device.

[0040] The above drawings include the following reference numerals:

[0041] 1. Amorphous strip alloy; 2. Feeding section; 3. Heat treatment section; 4. Discharging section; 10. Conveying device; 11. Roller transmission device; 111. Roller; 20. Tension adjustment mechanism; 21. Fixed roller; 22. Moving roller; 23. Counterweight; 30. Constant temperature environment furnace; 40. Power supply device; 41. First electrode; 42. Second electrode; 43. Current input device; 50. Correction device; 60. Sensor; 61. Transmitting structure; 62. Receiving structure; 70. Magnetic field generating device; 80. First detection device; 90. Material tray; 110. Winding device; 120. Second detection device; 130. Insulation layer coating device. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to facilitate the embodiments of the present invention described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatuses.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] During the heat treatment of amorphous alloys, faster heating and cooling rates facilitate the control of the crystallization process, promote the rapid formation of nanocrystalline structures, and reduce brittleness. After extensive research, the inventors discovered that conventional heat treatment methods that rely on external heat sources to heat the moving amorphous alloy strip through heat conduction are difficult to achieve rapid heating, resulting in slow travel speeds and low production efficiency. Furthermore, the partially crystallized alloy strip after treatment is highly brittle, making it difficult to coil the subsequent core.

[0047] In order to solve the above problems, Figure 1 and Figure 4As shown, in this embodiment, the preparation method of the partially crystallized soft magnetic alloy strip includes: making the amorphous strip alloy 1 move along a preset direction n, so that the moving speed is between 2m / min-30m / min; the amorphous strip alloy 1 includes a feeding section 2, a heat treatment section 3 and a discharging section 4 in the preset direction n, and applying tensile stress to the heat treatment section 3 in the preset direction n, so that the tensile stress is between 5MPa-500MPa; providing a constant temperature environment for the heat treatment section 3, so that the ambient temperature is between 100℃ and 500℃; during the movement of the amorphous strip alloy 1, passing an electric current through the heat treatment section 3, wherein the current direction is the preset direction n, and the current density is 10A / mm 2 -50A / mm 2 between.

[0048] Applying the technical solution of this embodiment, when an electric current is applied to the traveling amorphous alloy strip (amorphous strip alloy 1), Joule heat is generated inside the amorphous alloy strip. This self-heating method of the body can achieve rapid temperature rise and promote rapid crystallization, so the travel speed is fast, the production efficiency is high, and the brittleness is reduced. Then, a higher constant temperature ambient temperature is provided by an external heating device, so that the amorphous alloy strip is under the combined action of ambient temperature and Joule heat effect, that is, the combined action of external conduction heating and body self-heating, which realizes the rapid crystallization of amorphous alloy, and is also beneficial to grain control, grain refinement and the uniformity of nanocrystalline structure, not only improving production efficiency, but also improving toughness. In addition, while the current passes through the amorphous alloy strip, an induced magnetic field is also generated in the direction perpendicular to the current, which promotes transverse induced anisotropy. While the current passes through the amorphous alloy strip, a tensile force is applied to the amorphous alloy strip along the travel direction (preset direction n), and the tensile stress generated thereby promotes creep induced anisotropy. Both magnetic field-induced anisotropy and creep-induced anisotropy contribute to reducing the magnetic permeability of the partially crystallized alloy after current heat treatment. Therefore, the partially crystallized soft magnetic alloy ribbon prepared using the above preparation method can have low magnetic permeability and low brittleness, facilitating subsequent winding of the iron core.

[0049] It should be noted that the microstructure of the partially crystallized soft magnetic alloy ribbon prepared by the above preparation method includes two phases, crystal and amorphous, and the relative magnetic permeability is between 50 and 10,000.

[0050] It should also be noted that the above description of the amorphous alloy ribbon 1 as being divided into three sections: the feed section 2, the heat treatment section 3, and the discharge section 4. These sections are not fixed to the entire amorphous alloy ribbon 1. As the amorphous alloy ribbon 1 moves, the feed section 2 gradually transforms into the heat treatment section 3, and the heat treatment section 3 gradually transforms into the discharge section 4. The description of the amorphous alloy ribbon 1 as being divided into three sections here facilitates understanding of the preparation method.

[0051] In this embodiment, two electrodes are brought into contact with the amorphous alloy ribbon 1, and the amorphous alloy ribbon 1 between the two electrodes forms a heat treatment section 3. This method of applying electricity to the amorphous alloy ribbon 1 through contact between the electrodes prevents interference between the energization and movement of the amorphous alloy ribbon 1, thereby improving production efficiency. Furthermore, it reduces the manufacturing cost of the partially crystallized soft magnetic alloy ribbon.

[0052] like Figure 1 and Figure 4 As shown, in this embodiment, the preparation method further includes: adding at least one magnetic field in the heat treatment section 3, with the magnetic field oriented within the plane of the amorphous alloy ribbon 1 and perpendicular to a predetermined direction n. This preparation method is used to fine-tune the properties of partially crystallized soft magnetic alloys. Specifically, applying a magnetic field perpendicular to the direction of travel along the surface of the amorphous alloy ribbon 1 during heat treatment helps reduce magnetic permeability.

[0053] In this embodiment, the two electrodes are a first electrode 41 close to the feed section 2 and a second electrode 42 close to the discharge section 4. After long-term research, the inventors found that after a period of preparation using the above preparation method, the amorphous strip alloy 1 in contact with the second electrode 42 is prone to move along the second electrode axis L2 of the second electrode 42, and may fall off the second electrode 42, resulting in poor production continuity. In order to solve the above problem, as Figure 4 As shown, the preparation method further includes: correcting the deviation of the amorphous alloy ribbon 1 on the second electrode 42 so that the amorphous alloy ribbon 1 maintains contact with the second electrode 42. Specifically, after it is found that the amorphous alloy ribbon 1 has deviated for a certain distance on the second electrode 42, the position of the amorphous alloy ribbon 1 is corrected to ensure production continuity.

[0054] The inventors discovered that the reason why the amorphous alloy strip 1 deviates after running for a period of time is that the amorphous alloy strip 1 is subjected to a certain magnetic field force. Under the action of the magnetic field force, the amorphous alloy strip 1 moves along the second electrode axis L2. Moreover, the magnitude of the magnetic field force is related to the current density. The greater the current, the greater the magnetic field force. Therefore, continuous online correction is required. To solve the above problem, in this embodiment, the plane where the first electrode axis L1 of the first electrode 41 and the second electrode axis L2 of the second electrode 42 are located is used as the reference plane, and the angle between the second electrode axis L2 and the first electrode axis L1 within the reference plane is changed to correct the deviation of the amorphous alloy strip 1. The above method can generate a force that offsets the above magnetic field force, thereby preventing the amorphous alloy strip 1 from continuing to deviate and achieving the correction effect.

[0055] Because amorphous alloy strips are produced using a rapid solidification process, their thickness varies significantly along their length. This leads to fluctuations in tensile stress under constant tension. Simultaneously, strips of equal length exhibit significant electrical resistance variations, and their Joule heating effect also fluctuates under constant current density. This results in inconsistent properties along the longitudinal direction of the processed partially crystallized alloy strip. In this embodiment, the preparation method further includes: online, real-time measurement of magnetic parameters of the discharge section 4; determining the deviation of the magnetic parameters from preset values; and adjusting the process parameters of the current heat treatment process based on the deviation to maintain stable performance of the discharge section 4. This method enables real-time adjustment of the process parameters of the current heat treatment process based on actual conditions, thereby ensuring consistent performance of the processed material.

[0056] In this embodiment, the process parameters for adjusting the current heat treatment process include at least one of the current density of the applied current, the tensile stress of the applied tension, and the travel speed of the amorphous strip alloy 1. Specifically, the magnetic properties of the partially crystallized alloy strip produced are measured online in real time and used to adjust the process parameters of the heat treatment process in a closed loop. An induction coil is provided at the discharge section 4 to measure the magnetic properties of the discharge section 4, such as inductance, to identify the qualified characteristics of the product. By comparing with the preset qualified indicators, the tensile stress, current density, and travel speed are adjusted based on the difference. Given that both tension and current are process parameters that can be responded to immediately, the above-mentioned problem of "the performance of the partially crystallized alloy strip after treatment is easily inconsistent along the longitudinal direction" can be solved through online measurement and closed-loop control.

[0057] In this embodiment, the process parameters of the current heat treatment process may also include the ambient temperature of the constant temperature environment. Adjusting the ambient temperature of the constant temperature environment according to actual conditions can further reduce the brittleness of the treated strip and facilitate subsequent winding.

[0058] The present application also provides a method for preparing an iron core. An embodiment of the method includes: preparing a partially crystallized soft magnetic alloy strip, the method for preparing the partially crystallized soft magnetic alloy strip being the method described above; and winding the partially crystallized soft magnetic alloy strip to form the iron core. Because the partially crystallized soft magnetic alloy strip prepared according to the method for preparing the partially crystallized soft magnetic alloy strip has low brittleness, the partially crystallized soft magnetic alloy strip is less likely to break when wound around the iron core, thereby making the iron core preparation more stable and more efficient.

[0059] In this embodiment, the preparation method further includes: online real-time measurement of the inductance value of a single turn of the iron core; determining the deviation between the current single-turn inductance of the iron core and a preset value, and adjusting the process parameters of the current heat treatment process according to the deviation value. The above method can adjust the process parameters of the current heat treatment process in real time according to actual conditions, thereby further improving the consistency of the performance of the processed material. Of course, in other embodiments, the preparation method may also include: online real-time measurement of the inductance value of multiple turns of the iron core; determining the deviation between the current multi-turn inductance of the iron core and a preset value, and adjusting the process parameters of the current heat treatment process according to the deviation value.

[0060] In this embodiment, the process parameters for adjusting the current heat treatment process include at least one of the current density of the applied current, the tensile stress of the applied tension, the travel speed of the amorphous alloy ribbon 1, and the ambient temperature of the constant temperature environment. Specifically, a strip is wound around the core, which is wound along a winding mandrel. The ends of the mandrel are connected to an inductance meter via leads to measure the single-turn inductance of the core in real time during the winding process. The single-turn inductance of the core at a predetermined number of layers is used to indicate the qualified index of the strip-wound core. The tensile stress, current density, and travel speed are adjusted in real time based on the deviation of the single-turn inductance of the core from the predetermined value to maintain the properties of the partially crystallized soft magnetic alloy produced substantially unchanged along the longitudinal direction. Similarly, since the tension, current, and travel speed are all process parameters that can be responded to immediately, the aforementioned problem of "the properties of the partially crystallized alloy ribbon after treatment tend to be inconsistent along the longitudinal direction" can be solved through online measurement and closed-loop control.

[0061] In this embodiment, the method for preparing the iron core also includes: online real-time measurement of the inductance value of a single turn or multiple turns of the iron core; judging the deviation between the current single-turn inductance or multiple-turn inductance of the iron core and a preset value, and adjusting the number of winding layers of the wound iron core according to the deviation value to maintain consistent performance of the prepared iron core.

[0062] In this embodiment, between preparing the partially crystallized soft magnetic alloy ribbon and winding the partially crystallized soft magnetic alloy ribbon, the preparation method further includes applying an insulating layer to at least one side of the partially crystallized soft magnetic alloy ribbon. Specifically, the insulating layer can be applied to the ribbon surface before coiling the ribbon into the iron core, either on one side or on both sides. The partially crystallized alloy ribbon coated with the insulating layer helps reduce high-frequency eddy current losses in the iron core.

[0063] It should be noted that the relative magnetic permeability μe of the iron core continuously produced by the above method is between 50 and 10000, the remanence ratio (Jr / Js) is less than 0.1, and the ratio of coercive force to anisotropy field (Hc / Ha) is less than 10%.

[0064] The following combination Figure 1Briefly describing the flow diagram of the preferred embodiment, the specific steps include: providing a strip of amorphous alloy material, clamping and driving the amorphous strip alloy 1 along the longitudinal direction (preset direction n), and applying tension in the direction of travel, thereby generating tensile stress in the amorphous strip alloy 1, providing a constant temperature environment along the path of the amorphous strip alloy 1, and applying current to the amorphous strip alloy 1 along the travel direction n under the constant temperature environment and tensile stress state, thereby generating Joule heat and a transverse induced magnetic field inside the amorphous strip alloy 1, thereby achieving crystallization heat treatment of the amorphous strip alloy 1. After these steps, partially crystallized soft magnetic alloy strips can be continuously produced. To ensure the stability of the performance of the partially crystallized soft magnetic alloy after treatment, the method also includes the step of selecting a magnetic property parameter that identifies a qualified characteristic index for online real-time measurement, and adjusting the current density or tensile stress based on the deviation compared with the predetermined qualified index. It also selectively includes the step of winding the processed partially crystallized soft magnetic alloy into a tape-wound core, connecting the two ends of the winding mandrel to an inductance measuring instrument through leads, for real-time measurement of the single-turn inductance during the core winding process, and using a predetermined number of layers of single-turn inductance to identify the qualified index of the tape-wound core, and adjusting the current density or tensile stress in real time according to the deviation between the single-turn inductance of the core and the predetermined value to keep the performance of the partially crystallized soft magnetic alloy produced basically unchanged along the longitudinal direction, and also adjusting the number of layers of the tape-wound core according to the deviation measured in real time to keep the performance of the tape-wound core basically consistent.

[0065] Taking a current transformer core for a 50A DC-resistant smart meter as an example, the core qualification index is calibrated by measuring the 10-turn inductance Ls1 and Ls2 under 0A and 3.24A bias currents, and the difference ΔL = Ls2-Ls1. The results are Ls1 is 28μH and ΔL < -1μH. The material composition is Fe 73.5 Cu1Nb3Si 15.5 B7 (atomic percent), resistivity of 1.2 μΩm, thickness of 20 μm, and width of 5 mm. The prepared core has dimensions of 12 × 18 × 5 mm and weighs 4.5 g. By measuring the core's static hysteresis loop, magnetic properties such as permeability, coercivity, and remanence ratio were obtained, and the linearity of the hysteresis loop was evaluated. Permeability changes can also be briefly evaluated using Ls1, Ls2, and ΔL.

[0066] Figure 2 、 Figure 3 Table 1 shows a typical embodiment of the present invention. At a constant temperature of 350°C below the crystallization temperature and under a tensile stress of 42 MPa, a 26A / mm 2 The current density is used for crystallization heat treatment, and the speed reaches 15m / min. The static hysteresis loop and basic magnetization curve of the obtained core are shown in Figure 2As shown in the figure, the flat hysteresis loop has good linearity, low remanence ratio, and coercive force of about 1A / m. The curve of relative permeability changing with magnetic field is shown in the figure. Figure 3 As shown, from Figure 3 It can be seen that the relative permeability is around 800. The measured data of Ls1, Ls2 and ΔL in Table 1 also reflect the same result.

[0067]

[0068] Table 1 Typical current heat treatment process and product performance

[0069] Table 2 shows a comparison between the present invention and conventional heat treatment techniques. The process used and the measured data obtained in the first row are based on conventional heat treatment, i.e., crystallization heat treatment was performed at a furnace temperature of 570°C (higher than the crystallization temperature) under a tensile stress of 42 MPa, at a speed of 10 m / min. The other rows are based on the current heat treatment process of the present invention, i.e., at a holding temperature of 500°C (lower than the crystallization temperature), at a tensile stress of 42 MPa, with a current of 22 A / mm². 2 The crystallization heat treatment is carried out at a current density of 10m / min, 15m / min, and 18m / min, respectively. The measurement data of the iron core show that although both conventional heat treatment and electric current heat treatment can meet the iron core performance requirements, the iron core performance of the electric current heat treatment is more excellent. Moreover, experiments show that if the travel speed of conventional heat treatment exceeds 10m / min, the performance of the iron core will exceed the qualified index range, while the travel speed of the electric current heat treatment of the present invention reaches 18m / min, and the performance of the iron core still meets the requirements. This shows that the present invention can significantly improve production efficiency. In addition, the brittleness of the nanocrystalline alloy strip obtained by the electric current heat treatment process of the present invention is also less than that of conventional heat treatment, which is conducive to the production of wound iron cores.

[0070]

[0071] Table 2 Conventional heat treatment process and comparative examples of the present invention

[0072] Table 3 shows the influence of current density change on core performance in one embodiment of the present invention. Under the conditions of 350℃ holding temperature, 42MPa tensile stress and 15m / min running speed, the current density reaches 25A / mm 2 When the current density is from 25A / mm 2 Increased to 30A / mm 2When the current density is increased, the core performance is stable, indicating that the process window of current density is wide and easy to control. However, as the current density increases, the brittleness of the obtained strip increases, which is not conducive to winding the core. Therefore, there is an optimal current heat treatment process, that is, to select the lowest possible current density while ensuring the core performance. The optimal current density in this embodiment is 25A / mm 2 .

[0073]

[0074] Table 3 Effect of current density change on product performance

[0075] Table 4 shows the influence of tensile stress change on core performance in another embodiment of the present invention. 2 Under the conditions of current density and a travel speed of 15 m / min, a tensile stress of 42 MPa ensures that the core performance meets the qualified specifications. However, as the tensile stress decreases, ΔL increases significantly, indicating that the linearity of the hysteresis loop deteriorates. Therefore, tensile stress is a sensitive process parameter and an important controllable variable in process control. Furthermore, the greater the tensile stress, the greater the brittleness of the resulting strip. Therefore, the lowest possible tensile stress is selected while ensuring the core performance.

[0076]

[0077] Table 4 Effect of tensile stress changes on product performance

[0078] Table 5 shows the influence of ambient temperature change on the performance of the core in another embodiment of the present invention. 2 Under the conditions of current density and a travel speed of 15 m / min, the core performance is stable within the holding temperature range of 500°C to 450°C, indicating a wide process window for holding temperatures and ease of control. At holding temperatures as low as 400°C, the core performance falls outside the acceptable range. Lower holding temperatures are more effective in reducing brittleness, energy consumption, and costs during production.

[0079]

[0080] Table 5 Effect of holding temperature change on product performance

[0081] The present application also provides a device for preparing a partially crystallized soft magnetic alloy ribbon, such as Figure 4As shown, an embodiment of a device for preparing a partially crystallized soft magnetic alloy ribbon according to the present application includes: a conveying device 10, a tension adjustment mechanism 20, a constant temperature furnace 30, and an energizing device 40. The conveying device 10 is used to convey an amorphous alloy ribbon 1 along a predetermined direction n. The amorphous alloy ribbon 1 includes a feed section 2, a heat treatment section 3, and a discharge section 4 along the predetermined direction n. The tension adjustment mechanism 20 adjusts the tensile stress in the heat treatment section 3. At least a portion of the heat treatment section 3 is located within the constant temperature furnace 30, which is capable of heating the heat treatment section 3. The energizing device 40 contacts the heat treatment section 3 to pass current through the heat treatment section 3. Using the technical solution of this embodiment, the energizing device 40 applies current to the traveling amorphous alloy ribbon (amorphous alloy ribbon 1), generating Joule heat within the amorphous alloy ribbon. This self-heating method achieves rapid temperature rise and promotes rapid crystallization, resulting in high travel speed, high production efficiency, and reduced brittleness. The constant temperature environment furnace 30 then provides a relatively high constant temperature environment, so that the amorphous alloy strip is subjected to the combined action of the ambient temperature and the Joule heating effect, that is, the combined action of external conduction heating and the body self-heating, thereby achieving rapid crystallization of the amorphous alloy, which is also beneficial to grain control, grain refinement and uniformity of the nanocrystalline structure, not only improving production efficiency but also improving toughness. In addition, when the current passes through the amorphous alloy strip, an induced magnetic field is also generated in the direction perpendicular to the current, which promotes transverse induced anisotropy. When the current passes through the amorphous alloy strip, a tensile force is applied to the amorphous alloy strip along the direction of travel (preset direction n), and the tensile stress generated thereby promotes creep induced anisotropy. Both magnetic field induced anisotropy and creep induced anisotropy are conducive to reducing the magnetic permeability of the partially crystallized alloy after current heat treatment. Therefore, the partially crystallized soft magnetic alloy strip prepared by the above device can have a lower magnetic permeability and a lower brittleness, which facilitates the subsequent winding of the iron core.

[0082] like Figure 4As shown, in this embodiment, the energizing device 40 includes a first electrode 41, a second electrode 42, and a current input device 43. The first and second electrodes 41, 42 are spaced apart along a predetermined direction n. The amorphous alloy ribbon 1 contacts the first and second electrodes 41, 42, and the portion of the amorphous alloy ribbon 1 between the first and second electrodes 41, 42 forms a heat treatment section 3. The current input device 43 is electrically connected to the first and second electrodes 41, 42 and is capable of varying the current level. Specifically, as the amorphized amorphous alloy ribbon 1 enters a specific region (the region between the first and second electrodes 41, 42), this portion of the amorphous alloy ribbon 1 is electrically heated, undergoing crystallization. As the amorphous alloy ribbon 1 continues to move, the portion of the amorphous alloy ribbon 1 that has exited the specific region completes crystallization. This process continues, allowing the amorphized amorphous alloy ribbon 1 to be continuously processed into a partially crystallized alloy material. The above structure ensures that the electrification and movement of the amorphous strip alloy 1 do not interfere with each other, and the production efficiency is high; on the other hand, the cost of the preparation device of the partially crystallized soft magnetic alloy strip is low, thereby reducing the production cost of the partially crystallized soft magnetic alloy strip.

[0083] In this embodiment, the second electrode 42 is a pivotable electrode roller (a pivotally articulated electrode roller), and the amorphous alloy ribbon 1 contacts the upper surfaces of the first and second electrodes 41, 42. Specifically, as the amorphous alloy ribbon 1 moves, friction drives the second electrode 42 to rotate. This structure reduces friction between the amorphous alloy ribbon 1 and the second electrode 42 during movement (converting sliding friction to rolling friction), further reducing the possibility of breakage of the amorphous alloy ribbon 1 and ensuring production continuity. Of course, in other embodiments, the first electrode may also pivot.

[0084] In this embodiment, the plane containing the first electrode axis L1 of the first electrode 41 and the second electrode axis L2 of the second electrode 42 is used as a reference plane. The preparation apparatus further includes a deflection correction device 50, which is pivotally connected to the second electrode axis L2 and drives the second electrode axis L2 to oscillate within the reference plane. Specifically, the deflection correction device 50 is capable of driving the second electrode axis L2 to oscillate, causing the angle between the second electrode axis L2 and the first electrode axis L1 within the reference plane to change, thereby generating a force that offsets the magnetic field force, thereby preventing further deviation of the amorphous alloy ribbon 1 and achieving the deflection correction effect.

[0085] like Figures 4 to 6As shown, preferably, in this embodiment, the second electrode 42 has a pivot shaft that is perpendicular to the second electrode axis L2, and the correction device 50 is a motor that directly drives the pivot shaft to pivot. The above structure is simple and easy to implement. Of course, in other embodiments, the correction device 50 can also be a solenoid valve, the second electrode 42 has a pivot shaft, and a torsion spring is disposed on the pivot shaft. The solenoid valve can overcome the torsion force of the torsion spring to push the second electrode 42 to swing within the reference plane. When the solenoid valve is de-energized, the second electrode 42 returns to its original position due to the elastic restoring force of the torsion spring.

[0086] like Figures 4 to 6 As shown, preferably, Figure 2 As shown, in this embodiment, the preparation device also includes: a sensor 60, the sensor 60 is used to detect whether the amorphous strip alloy 1 is located at a preset position, and the sensor 60 is electrically connected or communicatively connected to the correction device 50. Specifically, when the sensor 60 detects that the amorphous strip alloy 1 is deviated, it sends a deviation signal to the outside, and the correction device 50 can start and stop according to the deviation signal, thereby realizing the correction function. Preferably, in this embodiment, the sensor 60 is a laser sensor, and the laser sensor includes a sending structure 61 and a receiving structure 62. Under normal circumstances, the laser emitted by the sending structure 61 is blocked by the amorphous strip alloy 1, and the receiving structure 62 cannot receive the laser. When the amorphous strip alloy 1 is deviated, the amorphous strip alloy 1 deviates from the laser line, causing the receiving structure 62 to receive the laser. Once the receiving structure 62 receives the laser, it sends a deviation signal to the outside. The above structure is simple and has high reliability.

[0087] like Figure 4 As shown, in this embodiment, the preparation apparatus further includes a magnetic field generating device 70, which is located between the first electrode 41 and the second electrode 42. The magnetic field generating device 70 generates at least one magnetic field, the direction of which is perpendicular to a predetermined direction n within the plane of the amorphous alloy ribbon 1. Specifically, applying a magnetic field perpendicular to the direction of travel along the surface of the amorphous alloy ribbon 1 during heat treatment is beneficial for reducing magnetic permeability.

[0088] like Figure 4 As shown, in this embodiment, the preparation apparatus further includes a first detection device 80 and a first control device. The first detection device 80 detects magnetic properties of the discharge section 4. The first detection device 80 is communicatively or electrically connected to the first control device. At least one of the conveying device 10, the tension adjustment mechanism 20, the constant temperature furnace 30, and the current input device 43 is electrically or communicatively connected to the first control device. These devices enable real-time adjustment of process parameters during the current heat treatment process based on actual conditions, thereby ensuring consistent performance of the processed material.

[0089] like Figure 4As shown, in this embodiment, the conveying device 10 includes two sets of roller transmission devices 11 arranged along a predetermined direction n in the feed section 2 and the discharge section 4, respectively. The roller transmission device 11 includes two rollers 111 arranged one above the other. The amorphous alloy strip 1 is clamped by the two rollers 111. The above structure is simple and can effectively and reliably convey the amorphous alloy strip 1.

[0090] like Figure 4 As shown, in this embodiment, the tension adjustment mechanism 20 includes two fixed rollers 21 spaced apart along a predetermined direction n in the feed section 2, and a movable roller 22 located between the two fixed rollers 21 in the predetermined direction n. A counterweight 23 is suspended below the movable roller 22, which is capable of moving up and down. The amorphous alloy strip 1 contacts the upper surfaces of the fixed rollers 21 and the lower surface of the movable roller 22. Changing the weight of the counterweight 23 changes the tensile stress in the heat treatment section 3 accordingly.

[0091] like Figure 4 As shown, in this embodiment, the preparation apparatus further includes: a material tray 90, located before the conveying device 10, and the amorphous strip alloy 1 is wound on the material tray 90. The above structure allows the initial material to be wound on the material tray 90, which can save the space occupied by the preparation apparatus of the partially crystallized soft magnetic alloy strip.

[0092] It should be noted that, specifically, in this embodiment, the constant temperature furnace 30 is a tunnel-type holding furnace. A set of roller transmission devices 11 are respectively installed at the entrance and exit of the tunnel-type holding furnace to clamp the amorphous alloy strip 1 and advance it longitudinally. A tension adjustment mechanism 20 (located outside the entrance of the constant temperature furnace 30) is provided between the two roller transmission devices 11 to apply tension to the amorphous alloy strip 1, thereby generating tensile stress in the longitudinal direction of the amorphous alloy strip. The tension adjustment mechanism can be used to adjust the magnitude of the tension, thereby adjusting the tensile stress, with the tensile stress range being 5-500 MPa. Current is applied to the alloy strip along the direction of travel. A first electrode 41 (on the entrance side outside the constant temperature furnace 30) and a second electrode 42 (on the exit side outside the constant temperature furnace 30) are disposed between two roller transmission devices 11, in close contact with the amorphous alloy strip. This current is applied to the amorphous alloy strip 1 in a tensioned state, thereby generating Joule heating and magnetic field-induced anisotropy in the amorphous alloy strip 1 between the two electrodes. The current input device 43 allows the current magnitude to be varied, thereby adjusting the current density. The current density is selected to be 10-50 A / mm². The applied current can be direct current, continuously varying alternating current, or pulsed current. Under constant temperature and tensile stress, the partially crystallized alloy, which has undergone current heat treatment, is continuously produced at the exit at the travel speed.

[0093] like Figure 4As shown, the present application provides a device for preparing an iron core. The device for preparing an iron core according to the present application includes: a device for preparing a partially crystallized soft magnetic alloy strip and a winding device 110. Among them, the device for preparing a partially crystallized soft magnetic alloy strip is the above-mentioned device. The winding device 110 is located at the rear side of the device for preparing a partially crystallized soft magnetic alloy strip, and the winding device 110 winds the partially crystallized soft magnetic alloy strip prepared by the device for preparing a partially crystallized soft magnetic alloy strip to form an iron core. Since the above-mentioned device for preparing a partially crystallized soft magnetic alloy strip has the advantage of being able to prepare a partially crystallized soft magnetic alloy strip with low magnetic permeability, the partially crystallized soft magnetic alloy strip is not easy to break during the winding process, thereby improving the continuity of the production of the iron core and increasing the production efficiency of the iron core.

[0094] like Figure 4 As shown, in this embodiment, the iron core preparation apparatus further includes: a second detection device 120 and a second control device. The second detection device 120 detects the inductance of a single turn of the iron core; the second detection device 120 is communicatively or electrically connected to the second control device, and at least one of the conveying device 10, tension adjustment mechanism 20, constant temperature environment furnace 30, and current input device 43 of the partially crystallized soft magnetic alloy strip preparation apparatus is electrically or communicatively connected to the second control device. These devices can adjust the process parameters of the current heat treatment process in real time based on actual conditions, thereby ensuring consistent performance of the processed material. Of course, in other embodiments, the second detection device can also detect the inductance of multiple turns of the iron core.

[0095] like Figure 4 As shown, in this embodiment, the winding device 110 is electrically or communicatively connected to the second control device. The second control device determines the deviation between the current single-turn inductance of the core and a preset value and controls the winding device 110 based on the deviation to adjust the number of winding layers of the core to maintain consistent performance of the prepared core. It should be noted that the first and second control devices can be different control devices or the same control device.

[0096] like Figure 4 As shown, in this embodiment, the iron core preparation apparatus further includes an insulating layer coating device 130, which is disposed between the partially crystallized soft magnetic alloy strip preparation apparatus and the winding device 110. Specifically, the insulating layer coating device 130 can be used to apply an insulating layer to the strip surface before winding the iron core. The coating can be applied on either one or both sides. The partially crystallized alloy strip coated with the insulating layer helps reduce high-frequency eddy current losses in the iron core.

[0097] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0098] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0099] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0100] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for preparing a partially crystallized soft magnetic alloy ribbon, characterized in that: include: The amorphous alloy strip (1) is moved along a preset direction n at a speed between 2 m / min and 30 m / min; The amorphous strip alloy (1) comprises a feeding section (2), a heat treatment section (3) and a discharging section (4) in the preset direction n, and a tensile stress is applied to the heat treatment section (3) in the preset direction n, so that the tensile stress is between 5 MPa and 500 MPa; Providing a constant temperature environment for the heat treatment section (3), so that the ambient temperature is between 100° C. and 500° C.; During the movement of the amorphous strip alloy (1), an electric current is passed through the heat treatment section (3), wherein the direction of the electric current is the preset direction n, and the current density of the electric current is 10A / mm 2 -50A / mm 2 between; Online real-time measurement of magnetic performance parameters of the discharge section (4); The deviation between the magnetic property parameter and a preset value is judged, and the process parameters of the current heat treatment process are adjusted according to the deviation value, wherein the process parameters of the current heat treatment process include: the current density of the current, the tensile stress, the travel speed of the amorphous strip alloy (1), and at least one of the ambient temperature of the constant temperature environment.

2. The method for preparing a partially crystallized soft magnetic alloy ribbon according to claim 1, wherein: Two electrodes are brought into contact with the amorphous alloy ribbon (1), and the amorphous alloy ribbon (1) between the two electrodes forms the heat treatment section (3).

3. The method for preparing a partially crystallized soft magnetic alloy ribbon according to claim 1 or 2, wherein: The preparation method further comprises: At least one magnetic field is added at the heat treatment section (3), wherein the direction of the magnetic field is within the plane where the amorphous strip alloy (1) is located and is perpendicular to the preset direction n.

4. The method for preparing a partially crystallized soft magnetic alloy ribbon according to claim 2, wherein: The two electrodes are a first electrode (41) close to the feeding section (2) and a second electrode (42) close to the discharging section (4), and the preparation method further comprises: The amorphous alloy strip (1) on the second electrode (42) is corrected to ensure that the amorphous alloy strip (1) remains in contact with the second electrode (42).

5. The method for preparing a partially crystallized soft magnetic alloy ribbon according to claim 4, wherein: Taking the plane where the first electrode axis L1 of the first electrode (41) and the second electrode axis L2 of the second electrode (42) are located as a reference plane, the angle between the second electrode axis L2 and the first electrode axis L1 in the reference plane is changed to correct the deviation of the amorphous strip alloy (1).

6. A method for preparing an iron core, characterized in that: include: Prepare a partially crystallized soft magnetic alloy ribbon, wherein the preparation method of the partially crystallized soft magnetic alloy ribbon is the method according to any one of claims 1 to 5; winding the partially crystallized soft magnetic alloy ribbon to form an iron core; measuring the inductance of a single turn or multiple turns of the iron core online and in real time; The deviation between the current single-turn inductance or multi-turn inductance of the iron core and a preset value is determined, and process parameters of the current heat treatment process are adjusted according to the deviation value, wherein the process parameters of the current heat treatment process include: the current density of the current, the tensile stress, the travel speed of the amorphous strip alloy (1), and at least one of the ambient temperature of the constant temperature environment.

7. The method for preparing an iron core according to claim 6, wherein: The preparation method further comprises: measuring the inductance of a single turn or multiple turns of the iron core online and in real time; The deviation between the current single-turn inductance or multi-turn inductance of the iron core and a preset value is determined, and the number of winding layers around the iron core is adjusted according to the deviation value.

8. The method for preparing an iron core according to claim 6, wherein: Between preparing the partially crystallized soft magnetic alloy ribbon and winding the partially crystallized soft magnetic alloy ribbon, the preparation method further comprises: An insulating layer is coated on at least one side of the partially crystallized soft magnetic alloy ribbon.

9. A device for preparing a partially crystallized soft magnetic alloy ribbon, characterized in that: include: A conveying device (10) is used to convey an amorphous strip alloy (1) along a preset direction n, wherein the amorphous strip alloy (1) comprises a feeding section (2), a heat treatment section (3), and a discharging section (4) in the preset direction n; A tension adjustment mechanism (20) for adjusting the tensile stress of the heat treatment section (3); a constant temperature environment furnace (30), wherein at least a portion of the heat treatment section (3) is located in the constant temperature environment furnace (30), and the constant temperature environment furnace (30) is capable of heating the heat treatment section (3); An energizing device (40) contacts the heat treatment section (3) to pass current through the heat treatment section (3), the energizing device (40) comprising: A first electrode (41) close to the feeding section (2) and a second electrode (42) close to the discharging section (4) are arranged at intervals along the preset direction n, the amorphous strip alloy (1) is in contact with the first electrode (41) and the second electrode (42), and the amorphous strip alloy (1) between the first electrode (41) and the second electrode (42) forms the heat treatment section (3); a current input device (43) electrically connected to the first electrode (41) and the second electrode (42), wherein the current input device (43) is capable of changing the magnitude of the current; A first detection device (80) for detecting magnetic performance parameters of the discharge section (4); A first control device, the first detection device (80) is communicatively connected or electrically connected to the first control device, and at least one of the conveying device (10), the tension adjustment mechanism (20), the constant temperature environment furnace (30) and the current input device (43) is electrically connected or communicatively connected to the first control device.

10. The preparation device according to claim 9, characterized in that: Taking the plane where the first electrode axis L1 of the first electrode (41) and the second electrode axis L2 of the second electrode (42) are located as a reference plane, the second electrode (42) is a pivotally hinged electrode roller, and the preparation device further comprises: A deviation correction device (50) is pivotally driven connected to the second electrode shaft L2, and the deviation correction device (50) drives the second electrode shaft L2 to swing within the reference plane.

11. The preparation device according to claim 10, characterized in that: The preparation device also includes: A sensor (60) is used to detect whether the amorphous strip alloy (1) is located at a preset position, and the sensor (60) is electrically connected or communicatively connected to the deviation correction device (50).

12. The preparation device according to claim 9, characterized in that The preparation device also includes: A magnetic field generating device (70) is located between the first electrode (41) and the second electrode (42), and the magnetic field generating device (70) generates at least one magnetic field, the direction of which is perpendicular to the preset direction n in the plane where the amorphous strip alloy (1) is located.

13. The preparation device according to claim 9, characterized in that The conveying device (10) comprises two groups of roller transmission devices (11) respectively arranged along the preset direction n at the feeding section (2) and the discharging section (4), the roller transmission device (11) comprising two rollers (111) arranged one above the other, and the amorphous strip alloy (1) is clamped by the two rollers (111).

14. The preparation device according to claim 9, characterized in that The tension adjustment mechanism (20) comprises two fixed rollers (21) arranged at intervals along the preset direction n in the feeding section (2) and a movable roller (22) located between the two fixed rollers (21) in the preset direction n, a counterweight (23) being suspended below the movable roller (22), the movable roller (22) being capable of moving up and down, and the amorphous strip alloy (1) being in contact with the upper surface of the fixed rollers (21) and the lower surface of the movable roller (22).

15. The preparation device according to claim 9, characterized in that The preparation device also includes: A material tray (90) is located before the conveying device (10), and the amorphous strip alloy (1) is wound on the material tray (90).

16. A device for preparing an iron core, comprising: A device for preparing a partially crystallized soft magnetic alloy strip, characterized in that the device for preparing a partially crystallized soft magnetic alloy strip is the device according to any one of claims 9 to 15; The winding device (110) is located at the rear side of the device for preparing the partially crystallized soft magnetic alloy strip, and the winding device (110) winds the partially crystallized soft magnetic alloy strip prepared by the device for preparing the partially crystallized soft magnetic alloy strip to form an iron core.

17. The iron core manufacturing device according to claim 16, characterized in that: The iron core preparation device also includes: A second detection device (120) detects the inductance value of a single turn or multiple turns of the iron core; A second control device, the second detection device (120) is communicatively connected or electrically connected to the second control device, and at least one of the conveying device (10), the tension adjustment mechanism (20), the constant temperature environment furnace (30) and the current input device (43) of the preparation device for the partially crystallized soft magnetic alloy strip is electrically connected or communicatively connected to the second control device.

18. The iron core manufacturing device according to claim 16, characterized in that: The iron core preparation device also includes: A second detection device (120) detects the inductance value of a single turn or multiple turns of the iron core; A second control device, the second detection device (120) is communicatively connected or electrically connected to the second control device, and the winding device (110) is electrically connected or communicatively connected to the second control device.

19. The iron core manufacturing device according to claim 16, characterized in that: The iron core preparation device also includes: An insulating layer coating device (130) is provided between the partially crystallized soft magnetic alloy strip preparation device and the winding device (110).

Images