CN113528984A - FeSiPC amorphous soft magnetic alloy and preparation method thereof - Google Patents

FeSiPC amorphous soft magnetic alloy and preparation method thereof Download PDF

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CN113528984A
CN113528984A CN202110708561.7A CN202110708561A CN113528984A CN 113528984 A CN113528984 A CN 113528984A CN 202110708561 A CN202110708561 A CN 202110708561A CN 113528984 A CN113528984 A CN 113528984A
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alloy
reduction
fesipc
soft magnetic
amorphous
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张华�
倪红卫
刘涛
李杨
张国阳
邵玉林
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
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    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
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    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
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    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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    • Y02P10/20—Recycling

Abstract

The invention provides a FeSiPC amorphous soft magnetic alloy and a preparation method thereof. The preparation method comprises the following steps: firstly, uniformly mixing a high-phosphorus iron ore raw material and apatite to perform carbon-based reduction treatment to obtain molten steel subjected to reduction pretreatment; then carrying out desulfurization treatment to obtain molten steel after desulfurization treatment; then ferrosilicon alloying treatment is carried out to obtain alloyed molten steel; rapidly cooling the alloyed molten steel by using a single-roller rotary quenching technology to obtain an amorphous strip; and finally, carrying out isothermal heat treatment to prepare the FeSiPC amorphous soft magnetic alloy. The preparation method takes high-phosphorus iron ore and apatite as raw materialsThe raw materials are prepared into reduction pretreated molten steel by adopting a direct reduction or smelting reduction non-blast furnace ironmaking technology. In addition, engineered Fe80Si1P10C9The difference between the (at.%) alloy component and the component of the reduction pretreated molten steel is not great, the target alloy can be obtained only by microalloying, and then the amorphous strip is adopted for one-step forming process, so that the method has the advantages of short flow, low cost and low energy consumption.

Description

FeSiPC amorphous soft magnetic alloy and preparation method thereof
Technical Field
The invention relates to the technical field of amorphous soft magnetic material preparation, in particular to a FeSiPC amorphous soft magnetic alloy and a preparation method thereof.
Background
The soft magnetic material has excellent magnetic performance and service performance, is widely applied to the high-tech fields of aviation, aerospace and the like, and along with the continuous development of science and technology, the requirements on light weight and miniaturization of soft magnetic material equipment are increasingly improved, so the development of the excellent soft magnetic material with high saturation magnetic induction intensity, high magnetic conductivity, low coercive force and low iron loss becomes one of the current and future important targets for the development of magnetic materials.
Compared with the traditional crystalline soft magnetic materials such as silicon steel, the resistivity of the iron-based amorphous soft magnetic alloy is about three times that of the silicon steel, the iron loss is only one fourth of that of the oriented silicon steel, and the no-load loss can be reduced by 70-80%. In the existing research, in order to improve the saturation magnetization of the iron-based amorphous alloy, enough ferromagnetic elements in the alloy must be ensured, but the amorphous forming capability of the alloy is usually weak due to the excessively high iron content; increasing the amorphous forming ability of the alloy generally requires the addition of more non-magnetic metalloids or metal components. The contradiction between the two mutually-locked elbows makes the iron-based amorphous alloy difficult to obtain greater breakthrough and further development on amorphous forming capability and saturation magnetization, and also brings a lot of difficulties for researchers in designing alloy components. At present, the common design concept of alloy components is to add elements of Si, P, C and B which are beneficial to amorphous formation, and simultaneously, the doping of other trace elements is also required to be considered, so as to ensure that the iron-based alloy has high amorphous formation capability and as high as possible iron content. In the process of industrially preparing the iron-based amorphous soft magnetic alloy strip at present, impurity elements in raw materials, particularly impurity elements in industrial iron phosphorus and iron carbon alloy, can cause surface crystallization of the strip and seriously deteriorate the soft magnetic performance. In order to further expand the application range of the iron-based amorphous soft magnetic alloy, a new method suitable for industrial production of the iron-based amorphous soft magnetic alloy needs to be developed.
The invention patent with the publication number of CN111001767A discloses a high-saturation magnetic induction density iron-based amorphous soft magnetic alloy and a preparation method thereof. The preparation method comprises the following steps: 1) preparing primary molten steel: the iron ore is used for blast furnace ironmaking, converter blowing or scrap steel is used for electric furnace smelting to obtain the steel; 2) carrying out external refining on the primary molten steel to further deoxidize, desulfurize, remove impurities, control the content of residual elements, and finely adjust alloy components to obtain required refined molten steel; 3) rapidly cooling the refined molten steel by using a single-roller rotary quenching technology to obtain an amorphous strip; 4) and carrying out heat treatment on the amorphous strip to obtain the amorphous strip. Although the traditional steel smelting process is adopted in the preparation method, the impurity content and the alloy components can be accurately controlled, but the preparation method has the defects of high blast furnace ironmaking cost, high energy consumption and high emission, and is not suitable for preparing a small amount of amorphous soft magnetic alloy.
In view of the above, there is a need to design an improved FeSiPC amorphous soft magnetic alloy and a method for preparing the same to solve the above problems.
Disclosure of Invention
The invention aims to provide a FeSiPC amorphous soft magnetic alloy and a preparation method thereof.
In order to realize the aim, the invention provides a preparation method of FeSiPC amorphous soft magnetic alloy, which comprises the following steps:
s1, preprocessing: placing the high-phosphorus iron ore and the apatite in a reduction reaction device, and performing carbon-based reduction treatment at 900-1700 ℃ to obtain a reduction alloy subjected to reduction pretreatment;
s2, refining: desulfurizing the reduction alloy subjected to reduction pretreatment obtained in the step S1 to obtain an alloy subjected to desulfurization treatment;
s3, alloying: performing ferrosilicon alloying treatment on the alloy subjected to the desulfurization treatment obtained in the step S2 to obtain an alloyed master alloy; in the alloyed master alloy, the main components and the mass percentage content thereof are as follows: fe91P6.2C2.2Si0.6(wt.％)；
S4, strip: setting the linear speed of a copper roller to be 20-60 m/S by using a single-roller rotary quenching technology, and rapidly cooling the alloyed master alloy obtained in the step S3 to obtain an amorphous strip with the thickness of 15-50 mu m; or a bar: obtaining a completely amorphous bar with the diameter of 1mm by using a copper mold casting technology;
s5, finished product: and (5) carrying out isothermal heat treatment on the amorphous strip or bar prepared in the step S4 at the heat preservation temperature of 240-420 ℃ for 10-300 min to prepare the FeSiPC amorphous magnetically soft alloy.
As a further improvement of the present invention, in step S1, the carbon-based reduction employs a direct reduction process, and the specific process is as follows: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash, pelletizing, drying, placing in a high-temperature atmosphere control furnace, controlling the reduction reaction atmosphere to be inert atmosphere, the reduction temperature to be 1000-1350 ℃, the reaction time to be 10-60 min, crushing and magnetically separating the obtained reaction product to obtain reduced iron powder, and then melting and separating the reduced iron powder at the high temperature of 1500-1650 ℃ to obtain the reduced alloy.
As a further improvement of the present invention, in step S1, the carbon-based reduction employs a smelting reduction process, and the specific process is as follows: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash uniformly, pelletizing, drying, and placing in a high-temperature atmosphere control furnace, wherein the reduction reaction atmosphere is controlled to be inert atmosphere, the reduction reaction temperature is 1500-1650 ℃, and the reaction time is 10-60 min; and separating slag and alloy after the reaction is finished to obtain the reduced alloy.
As a further improvement of the invention, step S3 directly carries out ferrosilicon alloying treatment, and the specific process is as follows: and (3) proportionally placing the alloy subjected to reduction and desulfurization treatment and the ferrosilicon alloy into an induction smelting furnace, controlling the atmosphere to be a reducing atmosphere, melting the alloy mixture for alloying, and adding refining slag for induction smelting to obtain the master alloy.
As a further improvement of the invention, the adding ratio of the high-phosphorus iron ore to the apatite is 7.75: 1; the alloy after reduction and desulfurization treatment and the ferrosilicon alloy are added in a proportion of 1: 0.026.
as a further improvement of the invention, the refining slag is 60SiO2-20CaO-10Al2O3-10B2O3The proportion of refining slag is 3 wt.%.
As a further improvement of the invention, in the step S4, the linear speed of the copper roller is 30-40 m/S, and the thickness of the strip is 25-35 μm;
in step S5, the heat preservation temperature is 320-360 ℃, and the heat preservation time is 30-60 min. In order to realize the purpose, the invention also provides the FeSiPC amorphous soft magnetic alloy prepared by the preparation method. The chemical formula of the FeSiPC amorphous soft magnetic alloy is as follows: fe80Si1P10C9(at.％)。
The FeSiPC amorphous soft magnetic alloy comprises the following components in percentage by mass: fe91P6.2C2.2Si0.6(wt.％)。
As a further improvement of the invention, the saturation magnetic induction intensity of the FeSiPC amorphous soft magnetic alloy is more than or equal to 1.45T, the coercive force is less than or equal to 3.2A/m, and the effective magnetic conductivity under 1KHz is more than or equal to 6000.
The invention has the beneficial effects that:
the invention provides a preparation method of FeSiPC amorphous soft magnetic alloy, which uses high-phosphorus iron oreAnd apatite as raw materials, and adopting direct reduction or smelting reduction non-blast furnace ironmaking technology to prepare reduction pretreated molten steel. In addition, engineered Fe80Si1P10C9The difference between the (at.%) alloy component and the component of the reduction pretreated molten steel is not great, the target alloy can be obtained only by microalloying, and then the amorphous strip is adopted for one-step forming process, so that the method has the advantages of short flow, low cost and low energy consumption.
Drawings
Fig. 1 is a morphology and an XRD pattern of the FeSiPC amorphous soft magnetic alloy prepared in example 1 of the present invention.
Fig. 2 is a hysteresis loop of the FeSiPC amorphous soft magnetic alloy prepared in example 1 of the present invention.
Fig. 3 is a graph of the effective permeability of the FeSiPC amorphous soft magnetic alloy prepared in example 1 of the present invention as a function of frequency.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided in the following embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a preparation method of FeSiPC amorphous soft magnetic alloy, which comprises the following steps:
s1, preprocessing: placing the high-phosphorus iron ore and the apatite in a reduction reaction device, and performing carbon-based reduction treatment at 900-1700 ℃ to obtain a reduction alloy subjected to reduction pretreatment;
s2, refining: desulfurizing the reduction alloy subjected to reduction pretreatment obtained in the step S1 to obtain an alloy subjected to desulfurization treatment;
s3, alloying: performing ferrosilicon alloying treatment on the alloy subjected to the desulfurization treatment obtained in the step S2 to obtain an alloyed master alloy; in the alloyed master alloy, the main components and the mass percentage content thereof are as follows: fe91P6.2C2.2Si0.6(wt.％)；
S4, strip: setting the linear speed of a copper roller to be 20-60 m/S by using a single-roller rotary quenching technology, and rapidly cooling the alloyed master alloy obtained in the step S3 to obtain an amorphous strip with the thickness of 15-50 mu m; or a bar: obtaining a completely amorphous bar with the diameter of 1mm by using a copper mold casting technology;
s5, finished product: and (5) carrying out isothermal heat treatment on the amorphous strip or bar prepared in the step S4 at the heat preservation temperature of 240-420 ℃ for 10-300 min to prepare the FeSiPC amorphous magnetically soft alloy.
Preferably, in step S1, the carbon-based reduction is performed by a direct reduction process, which includes: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash, pelletizing, drying, placing in a high-temperature atmosphere control furnace, controlling the reduction reaction atmosphere to be inert atmosphere, the reduction temperature to be 1000-1350 ℃, the reaction time to be 10-60 min, crushing and magnetically separating the obtained reaction product to obtain reduced iron powder, and then melting and separating the reduced iron powder at the high temperature of 1500-1650 ℃ to obtain the reduced alloy.
Preferably, in step S1, the carbon-based reduction is performed by a smelting reduction process, which includes: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash uniformly, pelletizing, drying, and placing in a high-temperature atmosphere control furnace, wherein the reduction reaction atmosphere is controlled to be inert atmosphere, the reduction reaction temperature is 1500-1650 ℃, and the reaction time is 10-60 min; and separating slag and alloy after the reaction is finished to obtain the reduced alloy.
Preferably, step S3 is performed by ferrosilicon alloying directly, and the specific process is as follows: and (3) proportionally placing the alloy subjected to reduction and desulfurization treatment and the ferrosilicon alloy into an induction smelting furnace, controlling the atmosphere to be a reducing atmosphere, melting the alloy mixture for alloying, and adding refining slag for induction smelting to obtain the master alloy.
Preferably, the adding ratio of the high-phosphorus iron ore to the apatite is 7.75: 1; the alloy after reduction and desulfurization treatment and the ferrosilicon alloy are added in a proportion of 1: 0.026.
preferably, the refining slag is 60SiO2-20CaO-10Al2O3-10B2O3The proportion of refining slag is 3 wt.%.
Preferably, in the step S4, the linear speed of the copper roller is 30-40 m/S, and the thickness of the strip is 25-35 μm;
in step S5, the heat preservation temperature is 320-360 ℃, and the heat preservation time is 30-60 min. The following provides a detailed description of the preparation method of the FeSiPC amorphous soft magnetic alloy.
Example 1
The high-phosphorus iron ore raw material adopted in the embodiment 1 of the invention is high-phosphorus ore blocks from Exie, the softening starting temperature is 1157 ℃, the softening finishing temperature is 1213 ℃, the softening interval is 56 ℃, and the molten drop temperature is 1479 ℃. The chemical composition of the high-phosphorus iron ore is shown in table 1. The apatite composition is shown in table 2 below.
Table 1 shows the chemical composition of high-phosphorus iron ore
Figure BDA0003132305440000061
TABLE 2 chemical composition of apatite
Figure BDA0003132305440000062
By adopting the raw materials, embodiment 1 provides a preparation method of a FeSiPC amorphous soft magnetic alloy, which comprises the following steps:
s1, preprocessing: placing the high-phosphorus iron ore and the apatite in a reduction reaction device, and carrying out carbon-based reduction treatment at 1200 ℃ to obtain reduction alloy molten steel after reduction pretreatment; the carbon-based reduction adopts a direct reduction process, and the specific process comprises the following steps: adding the high-phosphorus iron ore and the apatite at the adding ratio of 7.75: 1 mixing and crushing the mixture, then mixing the crushed mixture with reducing agent coal ash, agglomerating, drying the agglomerated mixture, then placing the agglomerated mixture in a high-temperature atmosphere control furnace, controlling the reduction reaction atmosphere to be inert atmosphere, controlling the reduction temperature to be 1200 ℃ and the reaction time to be 30min, crushing and magnetically separating the obtained reaction product to obtain reduced iron powder, and then melting and separating the reduced iron powder at the high temperature of 1600 ℃ to obtain the reduced alloy.
S2, refining: desulfurizing the molten steel subjected to reduction pretreatment obtained in the step S1 to obtain an alloy subjected to desulfurization treatment;
s3, alloying: adding ferrophosphorus into the alloy subjected to desulfurization treatment obtained in the step S2, and performing alloy component fine adjustment and ferrosilicon alloying treatment to obtain alloyed mother alloy molten steel; in the alloyed master alloy, the main components and the mass percentage content thereof are as follows: fe91P6.2C2.2Si0.6(wt.%); the specific process comprises the following steps: and (3) the alloy and the ferrosilicon alloy after reduction and desulfurization treatment are mixed according to the weight ratio of 1: and (3) placing the alloy mixture into an induction smelting furnace according to the proportion of 0.026, controlling the atmosphere to be a reducing atmosphere, melting the alloy mixture for alloying, and adding refining slag for induction smelting to obtain mother alloy molten steel.
Wherein the refining slag is 60SiO2-20CaO-10Al2O3-10B2O3The proportion of refining slag is 3 wt.%.
S4, strip: setting the linear speed of a copper roller to be 35m/S by using a single-roller rotary quenching technology, and rapidly cooling the alloyed master alloy obtained in the step S3 to obtain an amorphous strip with the thickness of 30 mu m;
or a bar: obtaining a completely amorphous bar with the diameter of 1mm by using a copper mold casting technology;
s5, finished product: and (4) carrying out isothermal heat treatment on the amorphous strip and/or the bar prepared in the step S4 at the heat preservation temperature of 340 ℃ for 45min to prepare the FeSiPC amorphous magnetically soft alloy.
Referring to fig. 1 to 3, the amorphous forming ability of the FeSiPC amorphous soft magnetic alloy provided in embodiment 1 of the present invention reaches 1mm, and the magnetic property is: the saturation magnetic induction intensity is 1.46T, the coercive force is 3.1A/m, and the effective magnetic conductivity is 6200 under 1 KHz.
Example 2
The high-phosphorus iron ore raw materials adopted in the embodiment 2 of the invention are the high-phosphorus ore blocks and the apatite.
By adopting the raw materials, embodiment 2 provides a preparation method of a FeSiPC amorphous soft magnetic alloy, which comprises the following steps:
s1, preprocessing: placing the high-phosphorus iron ore and the apatite in a reduction reaction device, and carrying out carbon-based reduction treatment at 1200 ℃ to obtain a reduction alloy subjected to reduction pretreatment; the carbon-based reduction adopts a melting reduction process, and the specific process comprises the following steps: adding the high-phosphorus iron ore and the apatite at the adding ratio of 7.75: 1, mixing and crushing the mixture, then uniformly mixing the crushed mixture with reducing agent coal ash, agglomerating, drying the mixture, and then placing the mixture in a high-temperature atmosphere control furnace, wherein the reduction reaction atmosphere is controlled to be inert atmosphere, the reduction reaction temperature is 1600 ℃, and the reaction time is 60 min; and separating slag and alloy after the reaction is finished to obtain the reduced alloy.
S2, refining: and (4) performing desulfurization treatment on the molten steel subjected to the reduction pretreatment obtained in the step (S1) to obtain an alloy subjected to desulfurization treatment.
S3, alloying: adding ferrophosphorus into the alloy subjected to the desulfurization treatment obtained in the step S2, and performing alloy component fine adjustment and ferrosilicon alloying treatment to obtain an alloyed master alloy; in the alloyed master alloy, the main components and the mass percentage content thereof are as follows: fe91P6.2C2.2Si0.6(wt.%); the specific process comprises the following steps: and (3) the alloy and the ferrosilicon alloy after reduction and desulfurization treatment are mixed according to the weight ratio of 1: and (3) placing the alloy in an induction smelting furnace according to the proportion of 0.026, controlling the atmosphere to be a reducing atmosphere, melting the alloy mixture for alloying, and adding refining slag for induction smelting to obtain the master alloy.
S4, strip: setting the linear speed of a copper roller to be 35m/S by using a single-roller rotary quenching technology, and rapidly cooling the alloyed master alloy obtained in the step S3 to obtain an amorphous strip with the thickness of 30 mu m; or a bar: obtaining a completely amorphous bar with the diameter of 1mm by using a copper mold casting technology;
s5, finished product: and (4) carrying out isothermal heat treatment on the amorphous strip and/or the bar prepared in the step S4 at the heat preservation temperature of 340 ℃ for 45min to prepare the FeSiPC amorphous magnetically soft alloy.
The FeSiPC amorphous soft magnetic alloy provided by the embodiment 2 of the invention has the following properties: the saturation magnetic induction intensity is 1.47T, the coercive force is 3.1A/m, and the effective magnetic conductivity is 6300 under 1 KHz.
In conclusion, the invention provides the FeSiPC amorphous soft magnetic alloy and the preparation method thereof. The preparation method comprises the following steps: firstly, carrying out carbon-based reduction treatment on a high-phosphorus iron ore raw material to obtain molten steel subjected to reduction pretreatment; then carrying out desulfurization treatment to obtain molten steel after desulfurization treatment; then ferrosilicon alloying treatment is carried out to obtain alloyed molten steel; rapidly cooling the alloyed molten steel by using a single-roller rotary quenching technology to obtain an amorphous strip; and finally, carrying out isothermal heat treatment to prepare the FeSiPC amorphous soft magnetic alloy. The invention provides a preparation method of FeSiPC amorphous magnetically soft alloy, which takes high-phosphorus iron ore and apatite as raw materials and adopts a non-blast furnace ironmaking technology of direct reduction or smelting reduction to prepare reduction pretreated molten steel. In addition, engineered Fe80Si1P10C9The difference between the (at.%) alloy component and the component of the reduction pretreated molten steel is not great, the target alloy can be obtained only by microalloying, and then the amorphous strip is adopted for one-step forming process, so that the method has the advantages of short flow, low cost and low energy consumption.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (9)

1. A preparation method of FeSiPC amorphous soft magnetic alloy is characterized by comprising the following steps: the method comprises the following steps:
s1, preprocessing: placing the high-phosphorus iron ore and the apatite in a reduction reaction device according to a preset proportion, and performing carbon-based reduction treatment at 900-1700 ℃ to obtain a reduction alloy subjected to reduction pretreatment;
s2, refining: desulfurizing the reduction alloy subjected to reduction pretreatment obtained in the step S1 to obtain an alloy subjected to desulfurization treatment;
s3, alloying: performing ferrosilicon alloying treatment on the alloy subjected to the desulfurization treatment obtained in the step S2 to obtain an alloyed master alloy;
s4, strip: setting the linear speed of a copper roller to be 20-60 m/S by using a single-roller rotary quenching technology, and rapidly cooling the alloyed master alloy obtained in the step S3 to obtain an amorphous strip with the thickness of 15-50 mu m;
or, the bar: obtaining a completely amorphous bar with the diameter of 1mm by using a copper mold casting technology;
s5, finished product: and (5) carrying out isothermal heat treatment on the amorphous strip or bar prepared in the step S4 at the heat preservation temperature of 240-420 ℃ for 10-300 min to prepare the FeSiPC amorphous magnetically soft alloy.
2. The preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 1, which is characterized by comprising the following steps: in step S1, the carbon-based reduction employs a direct reduction process, which includes the following steps: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash, pelletizing, drying, placing in a high-temperature atmosphere control furnace, controlling the reduction reaction atmosphere to be inert atmosphere, the reduction temperature to be 1000-1350 ℃, the reaction time to be 10-60 min, crushing and magnetically separating the obtained reaction product to obtain reduced iron powder, and then melting and separating the reduced iron powder at the high temperature of 1500-1650 ℃ to obtain the reduced alloy.
3. The preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 1, which is characterized by comprising the following steps: in step S1, the carbon-based reduction is performed by a smelting reduction process, which includes the following steps: crushing the high-phosphorus iron ore and the apatite, mixing the crushed high-phosphorus iron ore and the apatite with reducing agent coal ash uniformly, pelletizing, drying, and placing in a high-temperature atmosphere control furnace, wherein the reduction reaction atmosphere is controlled to be inert atmosphere, the reduction reaction temperature is 1500-1650 ℃, and the reaction time is 10-60 min; and separating slag and alloy after the reaction is finished to obtain the reduced alloy.
4. The preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 1, which is characterized by comprising the following steps: in the alloyed master alloy, the main components and the mass percentage content thereof are as follows: fe91P6.2C2.2Si0.6(wt.%); step S3 is to directly carry out ferrosilicon alloying treatment, which comprises the following steps: and (3) proportionally placing the alloy subjected to reduction and desulfurization treatment and the ferrosilicon alloy into an induction smelting furnace, controlling the atmosphere to be a reducing atmosphere, melting the alloy mixture for alloying, and adding refining slag for induction smelting to obtain the master alloy.
5. The preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 4, characterized in that: the adding proportion of the high-phosphorus iron ore to the apatite is 7.75: 1; the adding proportion of the alloy subjected to reduction and desulfurization treatment to the ferrosilicon alloy is 1: 0.026.
6. the preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 4, characterized in that: the refining slag is 60SiO2-20CaO-10Al2O3-10B2O3The proportion of refining slag is 3 wt.%.
7. The preparation method of the FeSiPC amorphous soft magnetic alloy according to claim 1, which is characterized by comprising the following steps: in the step S4, the linear speed of the copper roller is 30-40 m/S, and the thickness of the strip is 25-35 μm;
in step S5, the heat preservation temperature is 320-360 ℃, and the heat preservation time is 30-60 min.
8. FeSiPC amorphous soft magnetic alloy prepared by the preparation method of the FeSiPC amorphous soft magnetic alloy in any one of claims 1 to 7Gold, characterized by: the chemical formula of the FeSiPC amorphous soft magnetic alloy is as follows: fe80Si1P10C9(at.％)。
The FeSiPC amorphous soft magnetic alloy comprises the following components in percentage by mass: fe91P6.2C2.2Si0.6(wt.％)。
9. The FeSiPC amorphous soft magnetic alloy according to claim 8, characterized in that: the saturation magnetic induction intensity of the FeSiPC amorphous soft magnetic alloy is more than or equal to 1.45T, the coercive force is less than or equal to 3.2A/m, and the effective magnetic conductivity under 1KHz is more than or equal to 6000.
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