High-Bs iron-based soft magnetic amorphous alloy and preparation method thereof

Abstract

The invention discloses a high-Bs iron-based soft magnetic amorphous alloy and a preparation method thereof, and belongs to the field of metal materials. A chemical formula of the iron-based soft magnetic amorphous alloy is FeaCobBcCdSieMf, a, b, c, d, e and f are atomic percentages of corresponding elements respectively, 75 < = a < = 87, 0 < = b < = 4, 10 < = c < = 15, 0.5 < = d < = 2, 2 < = e < = 8, 0.001 < = f < = 1, a + b + c + d + e + f = 100, and M is a microelement which is one or a composition of more of Zn, Mn, N, Cu, Al, Ti and S. According to the iron-based amorphous alloy, an industrial-grade high-Bs-value amorphous strip can be prepared through a single-roller quenching method, and the purposes of large-scale production and batch application can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of amorphous alloy composite materials, and in particular to a high-Bs iron-based soft magnetic amorphous alloy and a preparation method thereof. Background Art

[0002] Iron-based amorphous alloys are prepared by rapid cooling technology, and their atomic arrangement presents a glassy structure with short-range order and long-range disorder. This unique microstructure eliminates defects such as grain boundaries and dislocations, reduces the domain wall pinning effect, and reduces the obstacles to the magnetization and demagnetization process. Therefore, amorphous alloys have lower coercivity than traditional alloys. It is precisely because of this microstructure that is different from traditional metal materials that amorphous materials have better soft magnetic properties. After decades of research and exploration by scientific researchers, amorphous alloys have achieved rapid development both in the theoretical stage in the laboratory and in the practical application stage of industrial production in factories.

[0003] In 1984, four transformer manufacturers in the United States demonstrated practical amorphous distribution transformers at the IEEE conference, marking the climax of the first stage of the development of amorphous soft magnetic alloys. By 1989, AlliedSignal in the United States had an annual production capacity of 60,000 tons of amorphous strips, and almost all of the iron-based amorphous strips came from this company. Amorphous alloy materials have begun to be used in the field of power electronics due to their excellent magnetic properties and energy-saving characteristics, providing an energy-saving and efficient magnetic material foundation for the subsequent development of third-generation semiconductor technology. In 1988, Yashiwa and others from Hitachi Metals in Japan developed nanocrystalline soft magnetic alloys (Finemet) through crystallization treatment based on amorphous alloys, and iron-based nanocrystalline alloys have been industrialized and introduced to the market. The performance of amorphous alloy materials has been continuously optimized, and their application in the fields of power electronics and communications has become more and more extensive, providing important material support for the development of third-generation semiconductor technology.

[0004] In recent years, with the large-scale application of third-generation semiconductors in power electronic devices, electronic devices are developing in the direction of miniaturization, high efficiency and high power density. Soft magnetic devices are usually used in conjunction with semiconductor chips in circuits to play the role of energy storage, transmission and filtering, and are the key to whether the new generation of electronic devices and motor equipment can operate efficiently. Among them, saturation magnetic induction intensity, as one of the basic indicators of the soft magnetic properties of amorphous materials, is an important influencing factor in achieving miniaturization and high efficiency of electronic devices. Especially for drive motors, the high saturation magnetic induction intensity unique to iron-based amorphous alloys helps to reduce the core loss of the motor core, thereby improving the overall efficiency of the motor. Especially under high-frequency operating conditions, the advantages of amorphous alloys are more obvious, because the iron loss of traditional silicon steel materials will increase sharply at high frequencies, while the iron loss of amorphous alloys is relatively low. Due to the reduction in iron loss, the heat generated by the motor during operation will also be reduced accordingly, which helps to reduce the temperature rise of the motor, improve the stability and service life of the motor, and indirectly reduce the maintenance and repair costs of the motor equipment. In addition, motor equipment with high saturation magnetic induction intensity can achieve higher power output in a smaller volume, which plays a vital role in the miniaturization and efficiency of motor equipment.

[0005] However, currently, amorphous strips with extremely high saturation magnetic induction intensity are often prepared in small quantities in the laboratory, and do not have the production conditions for industrial pilot production. There is still a long way to go before the large-scale production of 100-kilogram strips. For the patents that have been applied for, it is often difficult for industrial-grade wide strips that can be used for industrial production to have a high saturation magnetic induction intensity. For example, in the patent with application publication number CN 101840764 A, for the Fe-Si-BPC series amorphous alloy components, the maximum saturation magnetic induction intensity after annealing can only reach 1.64T. For this reason, the development of a high Bs wide industrial strip that can be used for industrialization is a problem that needs to be solved urgently. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the first objective of the present application is to provide a high Bs iron-based soft magnetic amorphous alloy.

[0007] The present application adopts the following technical solution: a high Bs iron-based soft magnetic amorphous alloy, the chemical formula of the iron-based soft magnetic amorphous alloy is: Fe a Co b B c C d Si e M f, where a, b, c, d, e, and f are the atomic percentages of the corresponding elements respectively, 75 ≤ a ≤ 87, 0 ≤ b ≤ 4, 10 ≤ c ≤ 15, 0.5 ≤ d ≤ 2, 2 ≤ e ≤ 8, 0.001 ≤ f ≤ 1, and a + b + c + d + e + f = 100, M is a trace element, which is one or more combinations of Zn, Mn, N, Cu, Al, Ti, and S.

[0008] The applicant selects one or several elements from three types of elements: ferromagnetic elements, metalloid elements, and transition metal elements to design a new composition of iron-based amorphous alloys. Iron-based amorphous alloys are first based on Fe elements, plus a small amount of Co elements. Since Co elements have similar magnetism to Fe elements, they can improve the saturation magnetic induction intensity while appropriately increasing the amorphous formation ability. However, since the cost of Co elements is higher than that of Fe elements, a small amount of Co elements are used to replace Fe elements to try to increase the Bs value of amorphous ribbons; elements such as B, C, and Si are selected from metalloid elements. The addition of B element can not only significantly improve the amorphous formation ability of amorphous alloys but also reduce the crystallization temperature of the alloy and promote the formation of the amorphous state. The addition of C element can refine the grain size of the alloy, which helps to improve the strength and toughness of the alloy. The addition of Si element can improve the corrosion resistance of the alloy, enabling the material to maintain stable performance under complex conditions; a small amount of Cu element is added among transition metal elements. The addition of Cu element can induce the precipitation of nanocrystalline phases such as α-Fe phase in the amorphous matrix. These nanocrystalline phases can significantly improve the mobility of magnetic domain walls, thereby increasing the saturation magnetic induction intensity; the addition of Cu can also weaken the atomic binding force, lower the energy barrier of crystallization, and promote the precipitation of crystalline phases; there is a strong chemical interaction between Al and other elements (such as Fe, B, etc.) and a negative mixing enthalpy, which helps to improve the amorphous formation ability; Mn element can refine the microstructure of amorphous alloys, increase the degree of atomic discretization, and thus improve the amorphous formation ability; Ti element can form strong chemical bonds with Fe atoms, enhance the atomic binding force, and thus improve the strength and hardness of iron-based amorphous alloys.

[0009] Preferably, b = 0.

[0010] Preferably, 14 ≤ c ≤ 15, d = 1, 2 ≤ e ≤ 3.

[0011] The second object of this application is to provide a preparation method of a high-Bs iron-based soft magnetic amorphous alloy prepared based on industrial raw materials, including the following steps: (1) Weighing: Weigh the raw materials according to a predetermined ratio to ensure that the raw materials are completely dry; (2) Loading: First, load part of the pure iron to the bottom of the furnace cavity of the melting furnace, then place part of the nodular cast iron above the pure iron, then add ferrosilicon and silicon, and finally add trace elements. Finally, place the remaining pure iron in the surrounding gaps; (3) Melting: Melting the raw materials in the melting furnace to melt the raw materials into molten steel; (4) Secondary smelting: Add the remaining raw materials into the smelting furnace for melting, and then slag is removed after melting; (5) Insulation: After the raw materials are completely melted, insulation is carried out, and slag removal is carried out again during the insulation period; (6) Sampling: The molten steel is taken out with a mold and cooled at room temperature to form a solid master alloy, and then a spectrum test is performed. If the spectrum test results show that the content of each component element is basically consistent with the content of the added element, the smelting is successful. If the spectrum test results show inconsistency, return to step (4), add the corresponding element raw materials to the smelting furnace for smelting, and then keep warm and take samples for spectrum measurement according to steps (5) and (6) until the content is basically consistent with the added element content; (7) Deslagging: After the elements of the solid master alloy are consistent with the added elements, deslagging is performed again after standing; (8) Steel pouring: After slag removal, let it stand and then pour the steel ingot; (9) Spraying: The steel ingot is placed in a crucible and heated, and then sprayed through the nozzle of the spraying equipment. During the spraying process, amorphous strip is prepared by a single-roll extreme cooling method.

[0012] Preferably, the smelting temperature in step (3) is 1400°C to 1580°C.

[0013] Preferably, in step (4), slag removal is performed after the smelting temperature reaches 1580°C.

[0014] Preferably, the insulation temperature in step (5) is between 1550°C and 1580°C.

[0015] Preferably, in step (7), the slag is removed again after standing for 15 minutes.

[0016] Preferably, in step (8), after standing, the temperature of the molten steel is cooled to 1250° C. before pouring the steel ingot.

[0017] Preferably, the nozzle in step (9) is preheated to 900°C, and then the steel ingot is heated to 1370°C before spraying.

[0018] Through secondary smelting and multiple slag removal, high Bs soft magnetic amorphous alloys can be prepared more efficiently, which has greatly promoted and facilitated the industrialization and industrialization of amorphous materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0020] Figure 1 is a flowchart of the preparation method of the iron-based soft magnetic amorphous alloy of the present application. Detailed implementation manners

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. Components of the embodiments of the present application described and illustrated in the drawings here are usually arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0022] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] Unless otherwise defined, technical terms or scientific terms used in this patent document should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second", and similar terms used in the patent specification and claims of the present application do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, terms such as "a", "an", or "the" do not denote a quantity limitation, but mean that there is at least one. The terms "including" or "comprising" and similar words mean that the elements or items appearing before "including" or "comprising" cover the elements or items listed after "including" or "comprising" and their equivalents, and do not exclude other elements or items. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present application.

[0024] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0025] The following will describe in detail some embodiments of the present application in conjunction with the accompanying drawings. Without conflict, the features in the following embodiments can be combined with each other.

[0026] A high-Bs iron-based soft magnetic amorphous alloy of the present application, the chemical formula of the iron-based soft magnetic amorphous alloy being: Fe a Co b B c C d Si e M f , where a, b, c, d, e, f are the atomic percentages of the corresponding elements respectively, 75 ≤ a ≤ 87, 0 ≤ b ≤ 4, 10 ≤ c ≤ 15, 0.5 ≤ d ≤ 2, 2 ≤ e ≤ 8, 0.001 ≤ f ≤ 1, and a + b + c + d + e + f = 100. M is a trace element, which is one or more combinations of Zn, Mn, N, Cu, Al, Ti, S.

[0027] The applicant selects one or several elements from three types of elements: ferromagnetic elements, metalloid elements, and transition metal elements to design a new composition of the iron-based amorphous alloy. The iron-based amorphous alloy is first based on the Fe element, plus a small amount of the Co element. Since the Co element has similar magnetism to the Fe element, it can improve the saturation magnetic induction intensity while appropriately increasing the amorphous formation ability. However, since the cost of the Co element is higher than that of the Fe element, a small amount of the Co element is used to replace the Fe element to try to increase the Bs value of the amorphous ribbon; elements such as B, C, Si, etc. are selected from the metalloid elements. The addition of the B element can not only significantly improve the amorphous formation ability of the amorphous alloy, but also reduce the crystallization temperature of the alloy and promote the formation of the amorphous state. The addition of the C element can refine the grain size of the alloy, which helps to improve the strength and toughness of the alloy. The addition of the Si element can improve the corrosion resistance of the alloy, so that the material can maintain stable performance under complex conditions; a small amount of the Cu element is added among the transition metal elements. The addition of the Cu element can induce the precipitation of nanocrystalline phases such as the α-Fe phase in the amorphous matrix. These nanocrystalline phases can significantly improve the mobility of the magnetic domain walls, thereby increasing the saturation magnetic induction intensity; the addition of Cu can also weaken the binding force between atoms, lower the energy barrier of crystallization, and promote the precipitation of the crystalline phase; there is a strong chemical interaction between Al and other elements (such as Fe, B, etc.), and a negative mixing enthalpy is presented, which helps to improve the amorphous formation ability; the Mn element can refine the microstructure of the amorphous alloy, increase the degree of atom discretization, thereby improving the amorphous formation ability; the Ti element can form strong chemical bonds with Fe atoms, enhance the binding force between atoms, thereby improving the strength and hardness of the iron-based amorphous alloy.

[0028] Please refer to Figure 1 shown. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy includes the following steps: (1) Weighing the materials: Weigh the raw materials according to the predetermined ratio to ensure that the raw materials are completely dry; (2) Loading the materials: First, load part of the pure iron to the bottom of the furnace cavity of the melting furnace, then place part of the nodular cast iron above the pure iron, then add ferrosilicon and silicon, and finally add trace elements. Finally, place the remaining pure iron in the surrounding gaps; (3) Melting: Melt the raw materials in the melting furnace to form molten steel. In this embodiment, heat is applied at a power of 132KW for 30 minutes. At this time, the temperature of the melting furnace is about 1400°C, and part of the raw materials start to melt. Continue heating to about 1580°C. At this time, the raw materials in the melting furnace are completely melted. If there is a lot of slag during the melting process, covering the surface of the molten steel in the furnace, then perform slag skimming once. If there is less slag, slag skimming is not necessary; (4) Secondary melting: Add the remaining raw materials to the melting furnace for melting, and perform slag skimming after melting. In secondary melting, in order to improve efficiency, the remaining raw materials are generally added all at once, unless the melting furnace is relatively small and will completely cover the surface of the molten steel after adding the remaining raw materials, then they will be added in batches and melted separately after each addition, and slag skimming will be performed separately after each melting; among them, the added raw materials cannot cover the surface of the molten steel, that is, after adding the raw materials, it is based on being able to see the flowing molten steel. The purpose is to prevent crusting. The purpose of secondary melting is one is to reduce the volume of the melting furnace and reduce costs, and the other is to make the raw materials mix more evenly. The melting temperature of secondary melting is still between 1400°C and 1580°C to completely melt the raw materials, and slag skimming is only performed after the temperature rises to 1580°C; (5) Heat preservation: After the raw materials are completely melted, perform heat preservation. During heat preservation, slag skimming is performed again. During heat preservation, use a temperature measuring gun to measure the temperature of the molten steel every five minutes to ensure that the temperature always remains between 1550°C and 1580°C; (6) Sampling: Take out the molten steel with a mold and cool it to form a solid master alloy at room temperature, and then perform spectral testing. If the spectral test results show that the content of each component element is consistent with the added element content, the melting is successful. If the spectral test results show inconsistency, then return to step (4), add the corresponding elemental raw materials to the melting furnace for melting, and then perform heat preservation and sampling for spectral testing according to steps (5) and (6) until it is consistent with the added element content; (7) Slag skimming: After the elements of the solid master alloy are consistent with the added element content, let it stand for 15 minutes and then perform slag skimming again; (8) Pouring the steel: After slag skimming, let it stand again. After the molten steel cools to 1250°C, pour the ingot; (9) Spraying: The steel ingot is placed in a crucible for heating. Before spraying, the surfaces of the cooling rollers are checked to ensure that the surfaces are smooth, free of pinholes, scratches, potholes, and residual adhesive. Different types of nozzles are then installed according to the target thickness and width of the strip, and the nozzles are preheated. In this embodiment, the nozzles are preheated to 900°C, and then the steel ingot is heated to about 1370°C. The copper rod speed is ensured to be 40 m / s. The spraying device starts spraying, and when the strip can be stably prepared, the plug rod is inserted so that the uniform amorphous strip can be stably wound around the copper roller. The target amorphous strip is prepared by the spraying device and the single-roller cooling method.

[0029] Finally, the prepared wide industrial strip can be rolled and sheared and rolled according to the needs of subsequent experiments and applications, and stored in test bags under vacuum to prevent performance deterioration caused by oxidation.

[0030] The first set of embodiments According to the composition range of the iron-based soft magnetic amorphous alloy of the present invention, we conducted this series of experiments. Table 1 shows the soft magnetic performance indicators of the iron-based amorphous soft magnetic alloy strip of 150~250kg, 40~50mm wide, controlled within 20μm thick and usable for industrial raw materials, which is prepared according to the composition of the present invention and prepared according to the preparation method of the present invention.

[0031] Table 1 The first group of examples

[0032] Note: The subscript bal. represents the balance Through the soft magnetic properties in Table 1, the applicant found that wide amorphous strips for industrial raw materials with Bs values ​​in the range of 1.65-1.7T can be stably prepared. However, through data analysis, it was found that after a small amount of Co element replaced Fe element, the saturation magnetic induction intensity only increased from 1.64T to 1.69T, and the increase was basically negligible, but the cost increased from 11,800 yuan / ton to 17,500 yuan / ton, an increase of almost 50%. It can be seen that the method of increasing the saturation magnetic induction intensity by replacing Fe element with a small amount of Co element is not feasible from the perspective of economic benefit or performance optimization, so b is preferably 0.

[0033] Second set of embodiments Therefore, the applicant adjusted the composition and no longer used Co element to replace Fe element to increase the saturation magnetic induction intensity. Instead, the applicant tried to optimize the atomic content ratio of metalloid elements to achieve the purpose of increasing the saturation magnetic induction intensity of the iron-based soft magnetic amorphous alloy strip while controlling the cost. On this basis, the applicant adjusted the composition and carried out a second group of examples. Table 2 shows the soft magnetic performance indexes measured for the iron-based amorphous soft magnetic alloy strips with a weight of 150 - 250 kg, a width of 40 - 50 mm, and a thickness controlled within 20 μm, which were prepared according to the preparation method of the present invention after the composition adjustment.

[0034] Table 2 Second Group of Examples

[0035] Note: The subscript "bal." represents the balance. Since the atomic radius of Si element is relatively small, when its content is too high, it is easier to form local atomic clusters in the unique short-range ordered and long-range disordered structure of the amorphous alloy, resulting in an increase in the inhomogeneity of the amorphous structure. This inhomogeneity will reduce the amorphous formation ability of the alloy, cause the alloy to crystallize, increase the difficulty of preparing the amorphous alloy strip, and bring inconvenience to production.

[0036] It can be clearly seen from the comparison of the two groups of examples before and after that, on the premise that the content of ferromagnetic elements remains unchanged after controlling the Si element content at 3 at%, the saturation magnetic induction intensity of the as-cast strip increases from 1.66 T to 1.73 T. At the same time, the industrial production cost is reduced from 11,800 yuan / ton to 9,500 yuan / ton, and the reduction rate reaches nearly 20%. For the No. 1 composition, not only does the saturation magnetic induction intensity of the as-cast amorphous strip increase from the original 1.66 T to 1.73 T, but also the coercivity of the as-cast strip is optimized extremely well, directly decreasing from 12.2 A / m in the first group of examples to 4.62 A / m, with a reduction rate as high as 62%. Therefore, when d = 1, 14 ≤ c ≤ 15, and 2 ≤ e ≤ 3, the comprehensive performance of the as-cast strip is the best, the saturation magnetic induction intensity has a significant increase, and the coercivity is also optimized extremely well.

[0037] In summary, reasonably controlling the Si element content can effectively increase the amorphous formation ability of the alloy, greatly optimize the soft magnetic properties (saturation magnetic induction intensity, coercivity) of the as-cast industrial strips. At the same time, no longer adding a small amount of Co element effectively reduces the economic cost of preparing a large number of amorphous strips, comprehensively optimizing from aspects such as preparation difficulty, strip properties, and industrial cost, and making great contributions to promoting the industrial development of iron-based amorphous soft magnetic alloys.

[0038] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A high-Bs iron-based soft magnetic amorphous alloy, characterized in that, The chemical formula of the iron-based soft magnetic amorphous alloy is: Fe a Co b B c C d Si e M f , where a, b, c, d, e, and f are the atomic percentages of the corresponding elements respectively, 75 ≤ a ≤ 87, 0 ≤ b ≤ 4, 10 ≤ c ≤ 15, 0.5 ≤ d ≤ 2, 2 ≤ e ≤ 8, 0.001 ≤ f ≤ 1, and a + b + c + d + e + f = 100. M is a trace element, which is one or more combinations of Zn, Mn, N, Cu, Al, Ti, and S.

2. The high-Bs iron-based soft magnetic amorphous alloy according to claim 1, wherein: b=0。 3. The high-Bs iron-based soft magnetic amorphous alloy according to claim 1 or 2, characterized in that: d=1, 14≤c≤15, 2≤e≤3.

4. A preparation method of a high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials, characterized in that, The following steps are involved: (1) Weighing: Weigh the raw materials according to the predetermined ratio to ensure that the raw materials are completely dry; (2) Loading: First, load part of the pure iron to the bottom of the furnace chamber of the smelting furnace, then place part of the ductile iron on top of the pure iron, then add ferroboron and silicon, and finally add trace elements, and finally place the remaining pure iron in the gaps around it; (3) Melting: Melting the raw materials in the melting furnace to melt the raw materials into molten steel; (4) Secondary smelting: Add the remaining raw materials into the smelting furnace for melting, and then slag is removed after melting; (5) Insulation: After the raw materials are completely melted, insulation is carried out, and slag removal is carried out again during the insulation period; (6) Sampling: The molten steel is taken out with a mold and cooled at room temperature to form a solid master alloy, and then a spectrum test is performed. If the spectrum test results show that the content of each component element is basically consistent with the content of the added element, the smelting is successful. If the spectrum test results show inconsistency, return to step (4), add the corresponding element raw materials to the smelting furnace for smelting, and then keep warm and take samples for spectrum measurement according to steps (5) and (6) until the content is basically consistent with the added element content; (7) Deslagging: After the elements of the solid master alloy are basically consistent with the added elements, deslagging is performed again after standing; (8) Steel pouring: After slag removal, let it stand and then pour the steel ingot; (9) Spraying: The steel ingot is placed in a crucible and heated, and then sprayed through the nozzle of the spraying equipment. During the spraying process, amorphous strip is prepared by a single-roll extreme cooling method.

5. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials according to claim 4, characterized in that, The smelting temperature in step (3) is 1400°C to 1580°C.

6. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials according to claim 4, characterized in that, In the step (4), slag removal is performed after the smelting temperature reaches 1580°C.

7. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials as described in claim 4, characterized in that, The insulation temperature in step (5) is between 1550°C and 1580°C.

8. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials according to claim 4, characterized in that, In the step (7), the slag is removed again after standing for 15 minutes.

9. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials according to claim 4, characterized in that, After standing in step (8), the molten steel is cooled to 1250°C before pouring the steel ingot.

10. The preparation method of the high-Bs iron-based soft magnetic amorphous alloy prepared from industrial raw materials according to claim 4, characterized in that, The nozzle in step (9) is first preheated to 900°C, and then the steel ingot is heated to 1370°C before the spraying begins.

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