CN116926446A - Iron-based nanocrystalline alloy and preparation method and application thereof - Google Patents
Iron-based nanocrystalline alloy and preparation method and application thereof Download PDFInfo
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- CN116926446A CN116926446A CN202310975931.2A CN202310975931A CN116926446A CN 116926446 A CN116926446 A CN 116926446A CN 202310975931 A CN202310975931 A CN 202310975931A CN 116926446 A CN116926446 A CN 116926446A
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- 239000000956 alloy Substances 0.000 title claims abstract description 215
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 211
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 199
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 90
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 230000004907 flux Effects 0.000 claims abstract description 8
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims description 70
- 238000010438 heat treatment Methods 0.000 claims description 34
- 238000005507 spraying Methods 0.000 claims description 17
- 230000001939 inductive effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 239000010970 precious metal Substances 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 21
- 230000006698 induction Effects 0.000 description 15
- 238000001816 cooling Methods 0.000 description 14
- 239000004615 ingredient Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000013080 microcrystalline material Substances 0.000 description 1
- 239000002707 nanocrystalline material Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/003—Making ferrous alloys making amorphous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention belongs to the technical field of nanocrystalline alloy, and particularly relates to an iron-based nanocrystalline alloy, and a preparation method and application thereof. The invention provides an iron-based nanocrystalline alloy, wherein the component expression of the alloy is Fe a Si b Cr c Cu d Al e Ni f The method comprises the steps of carrying out a first treatment on the surface of the Wherein a, b, c, d, e and f each represent a corresponding componentIn terms of atomic percent, a is more than or equal to 75 and less than or equal to 85.5,1, b is more than or equal to 75 and less than or equal to 3, c is more than or equal to 0.1 and less than or equal to 0.5, d is more than or equal to 3 and less than or equal to 8, e is more than or equal to 1 and less than or equal to 1.5, and f=100-a-b-c-d-e. The iron-based nanocrystalline alloy provided by the invention can keep the performances of the original iron-based nanocrystalline alloy, namely high magnetic flux density, high magnetic permeability and low coercivity without adding precious metal raw materials such as Nb, mo and the like.
Description
Technical Field
The invention belongs to the technical field of nanocrystalline alloy, and particularly relates to an iron-based nanocrystalline alloy, and a preparation method and application thereof.
Background
The iron-based nanocrystalline alloy is an amorphous material formed by taking iron element as a main component and adding a small amount of Nb, cu, si, B element into the alloy and performing a rapid solidification process, and the amorphous material can obtain a nanocrystalline matrix with nano-scale diameter after heat treatment and is dispersed and distributed on the amorphous matrix, which is called as microcrystal and nanocrystalline material.
The iron-based nanocrystalline alloy material has the characteristics of high saturation magnetic induction intensity, high initial permeability, low coercivity and the like, and can be applied to power electronic devices such as transformers, inductive cores, relays and the like.
However, precious metal raw materials such as Nb, mo and the like are added in the preparation of the traditional iron-based nanocrystalline alloy material, so that the preparation cost of the iron-based nanocrystalline alloy is high, and the iron-based nanocrystalline alloy material is difficult to popularize and apply on a large scale.
Disclosure of Invention
The invention provides an iron-based nanocrystalline alloy and a preparation method and application thereof, and aims to solve the defects that the preparation cost of the iron-based nanocrystalline alloy is high and large-scale popularization and application are difficult because precious metal raw materials such as Nb, mo and the like are added when the traditional iron-based nanocrystalline alloy material is prepared in the prior art.
Therefore, the invention provides the following technical proposal,
the invention provides an iron-based nanocrystalline alloy, wherein the component expression of the alloy is Fe a Si b Cr c Cu d Al e Ni f ；
Wherein a, b, c, d, e and f respectively represent the atomic percent of each corresponding component, a is more than or equal to 75 and less than or equal to 85.5,1 and less than or equal to 3, c is more than or equal to 0.1 and less than or equal to 0.5, d is more than or equal to 3 and less than or equal to 8, e is more than or equal to 1 and less than or equal to 1.5, and f=100-a-b-c-d-e.
Alternatively, 78.ltoreq.a.ltoreq.80, and b+c+d.ltoreq.10.
Optionally, the average grain size of the nanocrystalline in the iron-based nanocrystalline alloy is not more than 8nm;
and/or, the magnetic flux density of the iron-based nanocrystalline alloy is not less than 0.95T.
Optionally, the coercive force of the iron-based nanocrystalline alloy is less than 5A/m;
and/or the relative initial magnetic permeability of the iron-based nanocrystalline alloy is greater than 5000 and less than 15000.
The invention also provides a preparation method of the iron-based nanocrystalline alloy, which comprises the following steps:
s1: raw materials are mixed according to atomic percent and then smelted to obtain alloy ingots;
s2: carrying out secondary smelting on the obtained alloy cast ingot, and then spraying to obtain a strip;
s3: carrying out heat treatment on the obtained strip to obtain an iron-based nanocrystalline alloy;
in step S2, the secondary smelting mode is temperature-changing treatment.
Optionally, the temperature change treatment mode is as follows: firstly smelting for 10-30min at 1000-1050 ℃, and then smelting for 1-2h at 1150-1200 ℃.
And/or in the temperature changing treatment, the temperature rising rate is 5-10 ℃/min.
Optionally, in step S1, the smelting temperature is 1100-1300 ℃;
and/or the smelting time is 4-6h.
Optionally, in step S3, the temperature of the heat treatment is 400-500 ℃;
and/or the time of the heat treatment is 15-30min.
The invention also provides application of the iron-based nanocrystalline alloy in transformers, inductive cores and relays.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the invention provides an iron-based nanocrystalline alloy, wherein the component expression of the alloy is Fe a Si b Cr c Cu d Al e Ni f The method comprises the steps of carrying out a first treatment on the surface of the Wherein a, b, c, d, e and f respectively represent the atomic percent of each corresponding component, a is more than or equal to 75 and less than or equal to 85.5,1 and less than or equal to 3, c is more than or equal to 0.1 and less than or equal to 0.5, d is more than or equal to 3 and less than or equal to 8, e is more than or equal to 1 and less than or equal to 1.5, and f=100-a-b-c-d-e. The iron-based nanocrystalline alloy provided by the invention can keep the performances of the original iron-based nanocrystalline alloy, namely high magnetic flux density, high magnetic permeability and low coercivity without adding precious metal raw materials such as Nb, mo and the like.
2. The invention also provides a preparation method of the iron-based nanocrystalline alloy, which comprises the following steps: s1: raw materials are mixed according to atomic percent and then smelted to obtain alloy ingots; s2: carrying out secondary smelting on the obtained alloy cast ingot, and then spraying to obtain a strip; s3: carrying out heat treatment on the obtained strip to obtain an iron-based nanocrystalline alloy; in step S2, the secondary smelting mode is temperature-changing treatment. According to the preparation method of the iron-based nanocrystalline alloy, the amorphous phase in the alloy can be more compact by adopting a temperature changing treatment mode during secondary smelting, so that the prepared alloy has high magnetic flux density, high magnetic conductivity and low coercivity.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The examples of the present invention are implemented on the premise of the technical scheme of the present invention, and detailed implementation modes and processes are given, but the protection scope of the present invention is not limited to the following examples, in which the process parameters of specific conditions are not noted, and generally according to conventional conditions.
The endpoints of the ranges and any values disclosed in the present invention are not limited to the precise range or value, and the range or value should be understood to include values close to the range or value. For numerical ranges, one or more new numerical ranges may be obtained in combination with each other between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point values, and are to be considered as specifically disclosed in the present invention.
In the present invention, all values relating to the amounts of the components are "parts by weight" throughout unless specified and/or indicated otherwise. The process parameters for the specific conditions not noted in the examples below are generally as usual.
The following is a further detailed description of a method of preparing an iron-based nanocrystalline alloy according to the present invention by way of examples, which are given only to illustrate the present invention, but not to limit the scope of the present invention. The examples provided below may be used as a basis for further modifications and applications by those of ordinary skill in the art and are not intended to limit the scope of the invention in any way.
Example 1
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 2
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 79 Si 2 Cr 0.5 Cu 5 Al 1 Ni 12.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 3
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 78 Si 2 Cr 0.5 Cu 5 Al 1 Ni 13.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 4
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 85 Si 2 Cr 0.5 Cu 5 Al 1 Ni 6.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 5
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 3 Cr 0.5 Cu 8 Al 1 Ni 7.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 6
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at 1020 ℃ for 20min, heating the alloy cast ingot to 1180 ℃ at a speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 7
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at 1050 ℃ for 20min, heating the alloy cast ingot to 1150 ℃ at a speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 8
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 10 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 9
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were proportioned according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible and then placed in an induction coil of a smelting furnace, and smelted at 1100 ℃ for 6 hours to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 500 ℃ for 15min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Example 10
The component expression of the iron-based nanocrystalline alloy of the embodiment is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The embodiment provides a preparation method of an iron-based nanocrystalline alloy, which comprises the following steps:
(1) The ingredients were prepared according to the composition expression of the alloy of this example, and the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1300 ℃ for 4 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 400 ℃ for 30min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Comparative example 1
The component expression of the iron-based nanocrystalline alloy of the comparative example is Fe 80 Si 2 Cr 0.5 Nb 5 Mo 1 Ni 11.5 。
The comparative example provides a method for preparing an iron-based nanocrystalline alloy, comprising the following steps:
(1) The ingredients were proportioned according to the component expression of the alloy of the comparative example, the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at the temperature of 1000 ℃ for 20min, heating the alloy cast ingot to 1200 ℃ at the speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Comparative example 2
The component expression of the iron-based nanocrystalline alloy of the comparative example is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The comparative example provides a method for preparing an iron-based nanocrystalline alloy, comprising the following steps:
(1) The ingredients were proportioned according to the component expression of the alloy of the comparative example, the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at 1000 ℃ for 80min, and spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Comparative example 3
The component expression of the iron-based nanocrystalline alloy of the comparative example is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The comparative example provides a method for preparing an iron-based nanocrystalline alloy, comprising the following steps:
(1) The ingredients were proportioned according to the component expression of the alloy of the comparative example, the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at 1200 ℃ for 80 hours, and spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Comparative example 4
The component expression of the iron-based nanocrystalline alloy of the comparative example is Fe 80 Si 2 Cr 0.5 Cu 5 Al 1 Ni 11.5 。
The comparative example provides a method for preparing an iron-based nanocrystalline alloy, comprising the following steps:
(1) The ingredients were proportioned according to the component expression of the alloy of the comparative example, the raw materials were placed in a crucible, and then placed in an induction coil of a smelting furnace, and smelted at 1200 ℃ for 5 hours, to obtain an alloy ingot.
(2) Crushing the alloy cast ingot, placing the crushed alloy cast ingot into a smelting furnace, smelting the alloy cast ingot at 950 ℃ for 20min, heating the alloy cast ingot to 1250 ℃ at a speed of 5 ℃/min, continuously smelting the alloy cast ingot for 1h, and then spraying the alloy cast ingot to obtain the strip.
(3) And (3) carrying out heat treatment on the obtained strip at 450 ℃ for 20min, and cooling to room temperature to obtain the iron-based nanocrystalline alloy.
Test results
Statistical results of the performance data of the iron-based nanocrystalline alloys obtained in examples 1 to 10 and comparative examples 1 to 4 are shown in the following table:
| magnetic flux density (T) | Permeability of magnetic material | Coercivity (A/m) | |
| Example 1 | 1.093 | 11050 | 1.053 |
| Example 2 | 1.134 | 10670 | 2.541 |
| Example 3 | 1.293 | 12460 | 2.786 |
| Example 4 | 1.075 | 10500 | 3.154 |
| Example 5 | 0.967 | 14520 | 4.972 |
| Example 6 | 1.034 | 13100 | 3.184 |
| Example 7 | 1.130 | 9870 | 4.103 |
| Example 8 | 0.987 | 11290 | 1.116 |
| Example 9 | 1.052 | 12600 | 1.078 |
| Example 10 | 0.993 | 10550 | 4.132 |
| Comparative example 1 | 1.116 | 13200 | 5.146 |
| Comparative example 2 | 0.753 | 10050 | 8.172 |
| Comparative example 3 | 0.824 | 8500 | 9.130 |
| Comparative example 4 | 0.915 | 11430 | 6.143 |
As can be seen from the table, the iron-based nanocrystalline alloy provided by the invention can also maintain the performances of the original iron-based nanocrystalline alloy, namely high magnetic flux density, high magnetic permeability and low coercivity without adding precious metal raw materials such as Nb, mo and the like. In the secondary smelting, the amorphous phase inside the alloy can be more compact by adopting a temperature changing treatment mode, so that the prepared alloy has high magnetic flux density, high magnetic permeability and low coercive force.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An iron-based nanocrystalline alloy is characterized in that the component expression of the alloy is Fe a Si b Cr c Cu d Al e Ni f ；
Wherein a, b, c, d, e and f respectively represent the atomic percent of each corresponding component, a is more than or equal to 75 and less than or equal to 85.5,1 and less than or equal to 3, c is more than or equal to 0.1 and less than or equal to 0.5, d is more than or equal to 3 and less than or equal to 8, e is more than or equal to 1 and less than or equal to 1.5, and f=100-a-b-c-d-e.
2. The iron-based nanocrystalline alloy according to claim 1, wherein 78.ltoreq.a.ltoreq.80, and b+c+d.ltoreq.10.
3. The iron-based nanocrystalline alloy according to claim 1, wherein the average grain size of nanocrystalline in the iron-based nanocrystalline alloy is not greater than 8nm.
4. The iron-based nanocrystalline alloy according to claim 1, wherein the magnetic flux density of the iron-based nanocrystalline alloy is not less than 0.95T.
5. The iron-based nanocrystalline alloy according to claim 1, wherein the coercivity of the iron-based nanocrystalline alloy is less than 5A/m;
and/or the relative initial magnetic permeability of the iron-based nanocrystalline alloy is greater than 5000 and less than 15000.
6. A method for producing the iron-based nanocrystalline alloy according to any one of claims 1 to 5, comprising the steps of:
s1: raw materials are mixed according to atomic percent and then smelted to obtain alloy ingots;
s2: carrying out secondary smelting on the obtained alloy cast ingot, and then spraying to obtain a strip;
s3: carrying out heat treatment on the obtained strip to obtain an iron-based nanocrystalline alloy;
in step S2, the secondary smelting mode is temperature-changing treatment.
7. The iron-based nanocrystalline alloy according to claim 6, wherein the temperature change treatment is performed by: firstly smelting for 10-30min at 1000-1050 ℃, and then smelting for 1-2h at 1150-1200 ℃.
And/or in the temperature changing treatment, the temperature rising rate is 5-10 ℃/min.
8. The iron-based nanocrystalline alloy according to claim 6, wherein in step S1, the smelting temperature is 1100-1300 ℃;
and/or the smelting time is 4-6h.
9. The iron-based nanocrystalline alloy according to claim 6, wherein in step S3, the temperature of the heat treatment is 400-500 ℃;
and/or the time of the heat treatment is 15-30min.
10. Use of the iron-based nanocrystalline alloy according to any one of claims 1 to 5 in transformers, inductive cores, relays.
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