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CN114058810B - Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy - Google Patents

Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy Download PDF

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CN114058810B
CN114058810B CN202111371430.0A CN202111371430A CN114058810B CN 114058810 B CN114058810 B CN 114058810B CN 202111371430 A CN202111371430 A CN 202111371430A CN 114058810 B CN114058810 B CN 114058810B
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based amorphous
iron
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nanocrystalline alloy
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CN114058810A (en
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郑晓沛
陈飞
陈永丽
朱小琴
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Anhui Zhonghuan Soft Magnetic Technology Co ltd
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Anhui Zhonghuan Jingyan New Material Co ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • C21D6/008Heat treatment of ferrous alloys containing Si
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/04General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2201/00Treatment for obtaining particular effects
    • C21D2201/03Amorphous or microcrystalline structure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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Abstract

The invention provides a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy, which relates to the technical field of iron-based amorphous nanocrystalline alloy, and comprises the following steps: (1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying a compressive stress of 1-3MPa on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; (2) Vacuumizing the heat treatment furnace, and introducing protective gas; (3) Heating the iron-based amorphous alloy in the hearth, and rapidly cooling after heat preservation is finished; (4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field intensity to be 800-1600 gauss, and preserving heat for 30-60min; (5) Cooling to room temperature along with a furnace to obtain a high-performance iron-based amorphous nanocrystalline alloy; the residual magnetic induction intensity of the iron-based amorphous nanocrystalline alloy reaches 0.10T, and the coercive force reaches 0.42 A.m ‑1 The dynamic hysteresis loss reaches 8.3 W.kg ‑1 Has better performance.

Description

Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy
Technical Field
The invention relates to the technical field of iron-based amorphous nanocrystalline alloys, in particular to a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy.
Background
The iron-based amorphous/nanocrystalline magnetically soft alloy is used as a new generation 'double green' energy-saving material, and is widely applied to the power electronics fields of transformers, inductors, sensors and the like due to the characteristics of excellent soft magnetic properties, such as high saturation induction intensity, low coercivity, high permeability, low loss and the like. With the continuous progress of society, due to the development and demand of fields such as computer networks, high-density recording technologies, electric power systems, high-frequency micro-magnetic devices, etc., various components used are increasingly required to have high performance, high quality, small size and light weight, which requires that the performance of metal functional materials such as soft magnetic alloys for preparing these devices be continuously improved. Firstly, the alloy is usually prepared into amorphous strips by a rapid quenching process of master alloy, then the structure of the alloy is finely regulated and controlled by a heat treatment process, and single magnetic alpha-iron phase is separated out to be converted into a nanocrystalline structure. Therefore, the heat treatment process plays an important role in obtaining the high-performance iron-based nanocrystalline alloy.
The traditional heat treatment process generally starts from room temperature, heats according to a preset heating rate, heat preservation time and atmosphere, and finally cools to room temperature along with the furnace; however, in the heat treatment process, uneven precipitation of crystal grains, excessive growth of crystal grains, high magnetocrystalline anisotropy, uneven hardness of the surface of the strip, severe brittleness and the like are easily caused, so that the alloy has low saturation magnetic induction intensity, large coercive force and poor toughness and plasticity, and is not beneficial to obtaining the high-performance iron-based amorphous nanocrystalline alloy. For this reason, a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy is proposed to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy, so as to overcome the problems in the background art.
In order to achieve the above object, the technical scheme of the present invention is realized by the following technical scheme:
the heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying a compressive stress of 1-3MPa on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions;
(2) Vacuumizing the heat treatment furnace, and introducing protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 480-520 ℃ for 50-60min for the first time, heating to 540-580 ℃ for the second time, continuing to heat for 20-40min, and rapidly cooling to 460-480 ℃ after heat preservation is finished;
(4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field intensity to be 800-1600 gauss, and preserving heat for 30-60min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
Preferably, the composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
Preferably, in the step (1), the bidirectional winding is to wind the wire in one direction and then wind the wire in the opposite direction.
Preferably, in step (1), the applied compressive stress is 1MPa.
Preferably, the protective gas is high-purity nitrogen with the concentration of 99.99 percent, and the gas flow is controlled to be 1-5mL/s.
Preferably, in the step (3), the temperature is raised to 500 ℃ for 60min for the first time, and the temperature is raised to 560 ℃ for the second time and the temperature is kept for 30min.
Preferably, the first heating rate and the second heating rate are both 10 ℃/min.
Preferably, in the step (4), the magnetic field strength is controlled to be 800 gauss, and the temperature is kept for 60min.
The invention provides a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy, which has the advantages compared with the prior art that:
according to the invention, through bidirectional winding of the electric furnace wire on the corundum tube, currents in two directions are in opposite flow after the energization, so that magnetic fields exactly cancel each other, and surrounding magnetic fields are zero, so that the influence of the electric furnace wire magnetic field on a product during magnetic field heat treatment is avoided, the quality of the magnetic field heat treatment is ensured, and the quality of the iron-based amorphous nanocrystalline alloy is ensured;
according to the invention, certain compressive stress is applied, then the temperature is raised twice and kept for a period of time, and then the magnetic field intensity is controlled to be 800 gauss, so that the saturation magnetic induction intensity of the alloy is improved, the toughness and plasticity are improved through the action of the compressive stress, the coercive force of the iron-based amorphous nanocrystalline alloy is further reduced through the action of the magnetic field, and the quality of the iron-based amorphous nanocrystalline alloy is improved;
iron-based amorphous nanocrystalline alloy (Fe in the present invention 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 ) The residual magnetic induction of (2) reaches 0.10T, and the coercive force reaches 0.42A·m -1 The dynamic hysteresis loss reaches 8.3 W.kg -1 Has better performance.
Drawings
FIG. 1 is a schematic view of a corundum tube according to the present invention in two-way winding;
FIG. 2 is a graph showing the dynamic hysteresis loss of the Fe-based amorphous nanocrystalline alloy according to the magnetic field strength in example 3 of the present invention;
FIG. 3 is a graph showing the coercive force and residual magnetic induction of the iron-based amorphous nanocrystalline alloy according to example 3 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
Example 1
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 1mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 480 ℃ for 50min for the first time, heating to 540 ℃ for the second time, continuing to heat for 20min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 800 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
Example 2
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, applying 2MPa compressive stress on the iron-based amorphous alloy, and winding electric wires on corundum tubes in the hearth in a bidirectional manner; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 2mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for the first time and preserving heat for 55min, heating to 550 ℃ for the second time and preserving heat for 25min continuously, and rapidly cooling to 470 ℃ after the heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 900 gauss, and preserving heat for 40min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
Example 3
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 3mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 560 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 480 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 800 gauss, and preserving heat for 60min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
Example 4
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, applying 3MPa compressive stress on the iron-based amorphous alloy, and winding electric wires on corundum tubes in the hearth in a bidirectional manner; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 4mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 580 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 1200 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
Example 5
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 2mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 560 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to 1600 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy is characterized by comprising the following steps of:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying a compressive stress of 1-3MPa on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions;
(2) Vacuumizing the heat treatment furnace, and introducing protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 480-520 ℃ for 50-60min for the first time, heating to 540-580 ℃ for the second time, continuing to heat for 20-40min, and rapidly cooling to 460-480 ℃ after heat preservation is finished;
(4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field intensity to be 800-1600 gauss, and preserving heat for 30-60min;
(5) Cooling to room temperature along with a furnace to obtain a high-performance iron-based amorphous nanocrystalline alloy;
the composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3
In the step (1), the bidirectional winding is to wind the electric stove wire in one direction and then wind the electric stove wire reversely.
2. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy according to claim 1, wherein: in the step (1), the applied compressive stress was 1MPa.
3. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy according to claim 1, wherein: in the step (2), the protective gas is high-purity nitrogen with the concentration of 99.99 percent, and the gas flow is controlled to be 1-5mL/s.
4. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy according to claim 1, wherein: in the step (3), the temperature is raised to 500 ℃ for 60min for the first time, and the temperature is raised to 560 ℃ for the second time and the temperature is kept for 30min.
5. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy according to claim 1, wherein: the first heating rate and the second heating rate are 10 ℃/min.
6. The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy according to claim 1, wherein: in the step (4), the magnetic field strength is controlled to be 800 gauss, and the temperature is kept for 60min.
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US4288260A (en) * 1977-12-16 1981-09-08 Matsushita Electric Industrial Co. Ltd. Method of heat treatments of amorphous alloy ribbons
JPH0867911A (en) * 1994-08-30 1996-03-12 Hitachi Metals Ltd Method for heat-treating nano-crystalline magnetic alloy
JP2015127436A (en) * 2013-12-27 2015-07-09 井上 明久 High magnetic flux density soft-magnetic iron base amorphous alloy having high extensibility and workability
CN106916928A (en) * 2015-12-24 2017-07-04 上海光线新材料科技有限公司 A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece
CN112143864A (en) * 2020-09-28 2020-12-29 南通巨升非晶科技股份有限公司 Heat treatment process for high-performance iron-based amorphous nanocrystalline alloy
JP2021075752A (en) * 2019-11-08 2021-05-20 トヨタ自動車株式会社 Production method of alloy ribbon

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288260A (en) * 1977-12-16 1981-09-08 Matsushita Electric Industrial Co. Ltd. Method of heat treatments of amorphous alloy ribbons
JPH0867911A (en) * 1994-08-30 1996-03-12 Hitachi Metals Ltd Method for heat-treating nano-crystalline magnetic alloy
JP2015127436A (en) * 2013-12-27 2015-07-09 井上 明久 High magnetic flux density soft-magnetic iron base amorphous alloy having high extensibility and workability
CN106916928A (en) * 2015-12-24 2017-07-04 上海光线新材料科技有限公司 A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece
JP2021075752A (en) * 2019-11-08 2021-05-20 トヨタ自動車株式会社 Production method of alloy ribbon
CN112143864A (en) * 2020-09-28 2020-12-29 南通巨升非晶科技股份有限公司 Heat treatment process for high-performance iron-based amorphous nanocrystalline alloy

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