CN106916928A - A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece - Google Patents
A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece Download PDFInfo
- Publication number
- CN106916928A CN106916928A CN201510990249.6A CN201510990249A CN106916928A CN 106916928 A CN106916928 A CN 106916928A CN 201510990249 A CN201510990249 A CN 201510990249A CN 106916928 A CN106916928 A CN 106916928A
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- magnetic
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- amorphous
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Classifications
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- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The present invention provides a kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece, comprises the following steps：Winding steps, amorphous band or nanocrystalline strip are wound into needs the magnetic core of size；And heat treatment step, amorphous or nanocrystalline magnet core are thrown into heat-treatment furnace according to certain rule and are heat-treated；Wherein, magnetic field treatment is carried out simultaneously during heat treatment.By using magnetic-field heat treatment technique is added, the shielding properties of magnetic screen piece can be improved.In addition, plus after magnetic-field heat treatment, reduce saturation magnetostriction constant, so as to reduce the influence of stress, improve magnetic conductivity, reduce loss, improve charge efficiency.
Description
Technical field
It is used for magnetic the present invention relates to magnetic material, wireless charging, electromagnetic shielding and Technology for Heating Processing field, more particularly to one kind
Shield the amorphous of piece or the heat treatment method of nanocrystalline material.
Background technology
Wireless charging technology, refers to be charged using electromagnetic wave induction principle, and principle is similar to transformer.At present, it is portable
Scale uses and promotes wireless charging technology in the electronic equipments such as formula terminal, mobile phone, DV.The technology exists
Transmitting terminal and receiving terminal respectively have a coil.Send end-coil to be connected with line power supply to produce electromagnetic signal, receive end-coil
The electromagnetic signal of transmitting terminal is sensed so as to produce electric current to be charged for battery.Receiving end-coil needs to carry out electromagnetic screen by shielding piece
Cover.At present shielding piece use amorphous and nanocrystalline material, be heat-treated by using previous materials and subsequent processing operations and
Complete the shielding piece.
In wireless charging module, the function of the electromagnetic shielding piece that magnetic material is made includes two aspects.On the one hand it is electromagnetism to be
The coil coupling of sensing provides the passage of high magnetic permeability, improves charge efficiency；On the other hand it is the alternation magnetic for ensureing induction coil
The magnetic line of force that field is brought does not produce interference to other electronic units, plays shielding action.
Current amorphous 1K101 and 1K107 nanocrystalline material is used for scale in magnetic screen and uses.As wireless charging conductance
The non-crystalline material and nanocrystalline material of magnetic sheet, after wireless charging electromagnetic shielding piece is prepared into, its high-frequency loss mainly comes
From its charge efficiency in eddy-current loss, is influenceed, while magnetic conductivity is also reduced a lot.Used without magnetic heat in existing preparation method
Handling process, is heat-treated to amorphous, nanocrystalline strip, and general Technology for Heating Processing is in 370-450 DEG C or 500 DEG C of temperature
- 600 DEG C carry out common heat treatment.This heat treatment can not completely play the due electromagnetic performance of amorphous, nanocrystalline material.
It is high in 100KHZ frequency above magnetic conductivities although non-crystalline material is obtained in that magnetic property by this heat treatment method,
Magnetic hysteresis coefficient of dilatation (λ) is also not reaching to most preferably, and under stress, magnetic conductivity declines material, and performance has obvious change
Change.
The content of the invention
The present invention is directed to above-mentioned technical problem, it is proposed that a kind of amorphous or the heat treatment side of nanocrystalline material for magnetic screen piece
Method, transverse magnetic treatment is carried out in heat treatment simultaneously, and the magnetic sheet after heat treatment improves magnetic conductivity, and reduces loss,
Improve charge efficiency.
A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece of the invention, comprises the following steps：
Winding steps, amorphous band or nanocrystalline strip are wound into needs the magnetic core of size；With
Heat treatment step, amorphous or nanocrystalline magnet core is thrown into heat-treatment furnace according to certain rule and is heat-treated；
Wherein, magnetic field treatment is carried out simultaneously during heat treatment.
Preferably, in the heat treatment step, the setting for being heat-treated operating temperature is as follows：Non-crystalline material heat treatment temperature is
350 DEG C -480 DEG C, the heating-up time is -2 hours 50 minutes, and soaking time is -10 hours 1 hour；The wherein temperature rise period is
Two stages, holding stage is two stages.
Preferably, in the heat treatment step, the setting for being heat-treated operating temperature is as follows：Nanocrystalline material heat treatment temperature is
450-580 DEG C, the heating-up time is -3 hours 1 hour, and soaking time is -10 hours 1 hour, and the temperature rise period is divided into two
Stage or three phases, isothermal stage are three to five stages.
Preferably, the heat treatment step further includes following steps：
Vacuum step：After the magnetic core being wound into is put into heat-treatment furnace and tightens bell, vacuum -0.08MPa is evacuated to；
Protection gas is filled with step：It is 0.02-0.04MPa to be filled with air pressure in protective atmosphere to heat-treatment furnace, and the protective atmosphere is
Argon gas or nitrogen；
Magnetic field process step, when 250 DEG C of temperature are warmed up in heat-treatment furnace, applies spiral of the DC current in heat-treatment furnace
On copper pipe, the DC amperage of applying is 500-2000A, and the magnetic field intensity of generation is 1000-4000A/m, in heat treatment
Magnetic field treatment is carried out always in the gentle insulating process of liter, until the temperature of the magnetic core is reduced to less than 200 DEG C.
Preferably, the heat-treatment furnace is gas protecting heat processing furnace, and furnace binding is vertical magnetic field stove.
Preferably, the magnetic field is processed as transverse magnetic treatment, and the frequency that the magnetic screen piece is used is in more than 100KHZ, magnetic
Conductance more than 400.
Preferably, the non-crystalline material is 1K101 materials, and the nanocrystalline material is 1K107 materials.
Preferably, certain rule includes that multiple magnetic cores are spread in a single layer, and each magnetic core spacing is generally 30-50 millimeters.
Beneficial effects of the present invention：
1st, by using magnetic-field heat treatment technique is added, the shielding properties of magnetic screen piece is improved.
2nd, plus after magnetic-field heat treatment, saturation magnetostriction constant is reduced, so as to reduce the influence of stress, improves magnetic conductance
Rate, reduces loss, improves charge efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of the heat treatment method of the amorphous for magnetic screen piece of the invention or nanocrystalline material；
Fig. 2 (a) is the hysteresis curve figure of common heat treatment method；Fig. 2 (b) is the hysteresis curve of heat treatment method of the invention
Figure；
Fig. 3 is the furnace binding of heat-treatment furnace of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.Following examples are not limitation of the present invention.Do not carrying on the back
Under the spirit and scope of inventive concept, those skilled in the art it is conceivable that change and advantage be all included in the present invention
In.
As shown in figure 1, the amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece of the invention, including following step
Suddenly：
Winding steps (S1), non-crystalline material or nanocrystalline strip are wound into needs the magnetic core of size.Embodiments of the invention
In, amorphous band is 1K101 materials, and nanocrystalline strip is 1K107 materials.
Heat treatment step (S2), by amorphous or nanocrystalline magnet core according to certain regularly arranged and be put in heat-treatment furnace and carry out heat
Treatment, wherein, carry out magnetic field treatment simultaneously during heat treatment.Certain rule includes that multiple magnetic cores are spread in a single layer,
Each magnetic core spacing is generally 30-50 millimeters.
In heat treatment step, the setting for being heat-treated operating temperature is as follows：Non-crystalline material heat treatment temperature is 350 DEG C -480 DEG C,
Heating-up time is 50 minutes to 2 hours, and soaking time is -10 hours 1 hour, and the temperature rise period is divided into two stages, isothermal
Stage is two stages.
In heat treatment step, the setting for being heat-treated operating temperature is as follows：Nanocrystalline material heat treatment temperature is 450-580 DEG C,
Heating-up time is -3 hours 1 hour, and soaking time is -10 hours 1 hour, and the temperature rise period is divided into two stages or three ranks
Section, isothermal stage regards multiple stages that product (nanocrystalline material) performance requirement is as three to five.
Above-mentioned heat treatment step further includes following steps：
Vacuum step (S21)：After the magnetic core being wound into is put into heat-treatment furnace and tightens bell, vacuum is evacuated to
-0.08MPa。
Protection gas is filled with step (S22)：Be filled with protective atmosphere (generally argon gas or nitrogen), to heat-treatment furnace in air pressure
It is 0.02-0.04Mpa.Air pressure is controlled by gas-pressure controlling valve in heat-treatment furnace.
Magnetic field process step (S23), when 250 DEG C of temperature are warmed up in heat-treatment furnace, applying DC current is 500-2000A,
Magnetic field intensity is 1000-4000A/m, the magnetic conductivity performance requirement according to required by product, is carried out always in heat treatment process
Magnetic field is processed, until the temperature of the iron core is reduced to less than 200 DEG C.
Heat-treatment furnace of the invention is gas protecting heat processing furnace, and furnace binding is vertical magnetic field stove, furnace binding such as Fig. 3 institutes
Show.Heat-treatment furnace of the invention has body of heater 31, the one layer of heating resistance wire 32 of outer shroud ring of body of heater 31, heating resistance wire 32
It is outward heat-insulated asbestos layer 33, is stainless steel layer 34 outside heat-insulated asbestos layer 33, play a part of support copper pipe, outermost layer is
Cored screw copper pipe 35.After spiral copper pipe 35 plus DC current, the inside of spiral copper pipe 35 produces magnetic field.
Common heat treatment equipment is generally horizontal vacuum furnace, gas-protection-free, product (amorphous, nanocrystalline material) be heated according to
Carried out by conduction, the heat time is long, product is heated uneven.And in the present invention, product can be by conduction and gaseous exchange
Mode is heated, and heating is abundant, and effect is good, and the time is short, and the furnace temperature temperature difference is small, with improve production efficiency and energy-conservation
Effect.
The frequency used according to magnetic screen flake products and magnetic conductivity requirement, the magnetic field are processed as transverse magnetic treatment.It is preferred that
The frequency that magnetic screen piece is used is in more than 100KHZ, magnetic conductivity more than 400.
As described above, the inventive method carries out magnetic field treatment simultaneously by during common heat treatment, after making heat treatment
Magnetic sheet can reach optimal performance under high-frequency, and magnetic hysteresis coefficient of dilatation (λ) goes to zero substantially, in high current or big
It is not easy saturation under magnetic field, magnetic property change stabilization, resistance to stress effect is remarkably reinforced.
Add magnetic field in annealing process, magnetic domain carries out appropriate arrangement in the presence of external magnetic field, reduces total system freedom
Energy.After system is cooled down, atoms permeating is suppressed, and as a result the system has uniaxial anisotropy.It is heat-treated by transverse magnetic
In the case of, flat hysteresis curve can be obtained.Typically vertical magnetic treatment can improve DC characteristic, and transverse magnetic treatment can be with
A.C.power loss is reduced, such that it is able to obtain good wideband constant permeability energy.
Fig. 2 (a) is the hysteresis curve figure of common heat treatment method；Fig. 2 (b) is heat treatment method of the invention (plus vertical magnetic
) hysteresis curve figure.In Fig. 2 (a) and Fig. 2 (b), the magnetic of magnetic core when μ 0 refers to excitatory magnetic field intensity H 0
Conductance, μm is the maximum relative permeability of magnetic core equivalent to initial relative permeability, and H is magnetic field intensity, and unit is
A/M (peace/rice), B are magnetic induction intensity, and unit is T (tesla).Magnetic permeability μ=B/H.
In order to be contrasted to ordinary heat treatment and magnetic field heat treatment process of the invention, the present inventor is the milli of width 55
The amorphous band of rice is wound into the annular core (magnetic core) of ￠ 100* ￠ 70*55.It is standard specimen, 10 warps with 20 magnetic cores
Cross common heat treatment, 10 are heat-treated by transverse magnetic, the magnetic conductivity and magnetic hysteresis of the magnetic sheet that two kinds of heat treatment methods are obtained are flexible
Coefficient (λ) is as follows respectively.
(1) ordinary heat treatment, heat treatment temperature is 420 DEG C (degree Celsius), heat treatment soaking time 2 hours (h).
As shown in table 1.
Table 1
The magnetic conductivity of the magnetic screen piece that the magnetic sheet obtained with above-mentioned common heat treatment method makes and charge efficiency such as table 2 below institute
Show.The magnetic screen piece is made up of the magnetic sheet of two layers of above-mentioned acquisition, and size is 60mm*55mm.
Table 2
(2) transverse magnetic Technology for Heating Processing, heat treatment temperature is 420 DEG C, is heat-treated soaking time 2h, is set using transverse magnetic
Standby is vertical transverse magnetic stove, and magnetic field intensity is 3000A/m.As shown in table 3.
Table 3
The magnetic conductivity and charge efficiency of the magnetic screen piece made of transverse magnetic heat treatment method are as shown in table 4 below.The magnetic screen piece
It is made up of the magnetic sheet of two layers of above-mentioned acquisition, size is 60mm*55mm.
Table 4
Wherein, magnetic sheet and magnetic screen piece are carried out with Agilent electric impedance analyzer (4294A precise impedances analyzer) after heat treatment
The test of magnetic conductivity.
In addition, the assay method of magnetic hysteresis coefficient of dilatation is determined using strain resistor mensuration.Ferromagnetic material is in magnetization
When, the phenomenon for elongating or shortening of length can occur along the direction of magnetization, this effect can be with magnetostriction coefficient λ come table
Show.And the size of λ is equal to the ratio of the elongation and total length along the direction of magnetization, unit typically takes ppm.
The general principle of strain resistor mensuration is the change that magnetic hysteresis telescopic shape change is converted into a kind of utilization strain resistor resistivity
Change, the method for determining magnetic hysteresis coefficient of dilatation λ by measuring the change of this resistance.Resistance strain gage is pasted onto detected sample
It is placed on product in measurement magnetic field, when sample is deformed upon, the resistance value of foil gauge can ensue change, and the λ of sample can
To be expressed as：
λ=Δ l/l=CK* Δs R/R
In formula, C is the structural parameters of straingauge, and R is the initial value of straingauge, times magnifications of the K comprising measuring system
Number.
Knowable to two kinds of above-mentioned contrasts of heat treatment mode, compared to the magnetic sheet for commonly being obtained without magnetic heat treatment, magnetic of the invention
The magnetic sheet obtained after the heat treatment of field, its magnetic conductivity is improved, and is lost lower.Further, magnetic field of the invention heat is used
The magnetic sheet for the treatment of and the magnetic screen piece that makes, charging performance test is carried out to it, and charge efficiency is generally improved.
It is only in sum presently preferred embodiments of the present invention, not for limiting practical range of the invention.It is i.e. all according to the present invention
The equivalence changes that the content of claim is made and modification, should all belong to technology category of the invention.
Claims (8)
1. a kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece, it is characterised in that including following step
Suddenly：
Winding steps, amorphous band or nanocrystalline strip are wound into needs the magnetic core of size；With
Heat treatment step, amorphous or nanocrystalline magnet core is thrown into heat-treatment furnace according to certain rule and is heat-treated；
Wherein, magnetic field treatment is carried out simultaneously during heat treatment.
2. method according to claim 1, it is characterised in that in the heat treatment step, is heat-treated operating temperature
Setting it is as follows：Non-crystalline material heat treatment temperature is 350 DEG C -480 DEG C, and the heating-up time is -2 hours 50 minutes, during insulation
Between be -10 hours 1 hour；The wherein temperature rise period is two stages, and holding stage is two stages.
3. method according to claim 1, it is characterised in that in the heat treatment step, is heat-treated operating temperature
Setting it is as follows：Nanocrystalline material heat treatment temperature is 450-580 DEG C, and the heating-up time is -3 hours 1 hour, soaking time
It it is -10 hours 1 hour, the temperature rise period is divided into two stages or three phases, isothermal stage is three to five stages.
4. according to the method in claim 2 or 3, it is characterised in that the heat treatment step further includes as follows
Step：
Vacuum step：After the magnetic core being wound into is put into heat-treatment furnace and tightens bell, vacuum -0.08MPa is evacuated to；
Protection gas is filled with step：It is 0.02-0.04MPa to be filled with air pressure in protective atmosphere to heat-treatment furnace, and the protective atmosphere is
Argon gas or nitrogen；
Magnetic field process step, when 250 DEG C of temperature are warmed up in heat-treatment furnace, applies spiral of the DC current in heat-treatment furnace
On copper pipe, the DC amperage of applying is 500-2000A, and the magnetic field intensity of generation is 1000-4000A/m, in heat treatment
Magnetic field treatment is carried out always in the gentle insulating process of liter, until the temperature of the magnetic core is reduced to less than 200 DEG C.
5. method according to claim 4, it is characterised in that the heat-treatment furnace is gas protecting heat processing furnace,
Furnace binding is vertical magnetic field stove.
6. method according to claim 5, it is characterised in that the magnetic field is processed as transverse magnetic treatment, the magnetic
The frequency that shielding piece is used is in more than 100KHZ, magnetic conductivity more than 400.
7. method according to claim 1, it is characterised in that the non-crystalline material is 1K101 materials, described to receive
The brilliant material of rice is 1K107 materials.
8. method according to claim 1, it is characterised in that certain rule includes that multiple magnetic cores are spread in a single layer,
Each magnetic core spacing is generally 30-50 millimeters.
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| CN201510990249.6A CN106916928A (en) | 2015-12-24 | 2015-12-24 | A kind of amorphous or the heat treatment method of nanocrystalline material for magnetic screen piece |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447674A (en) * | 2018-04-28 | 2018-08-24 | 深圳市信维通信股份有限公司 | A kind of wireless charging transmitting-receiving module preparation process and wireless charging receive and dispatch module |
| CN108541208A (en) * | 2018-04-25 | 2018-09-14 | 邵爽 | The preparation method of wireless charging electromagnetic shielding piece |
| CN109666787A (en) * | 2019-02-20 | 2019-04-23 | 中山市董泽粉末涂料有限公司 | A kind of preceding heat treatment method of ferrous alloy band solidification |
| CN109735688A (en) * | 2018-12-24 | 2019-05-10 | 广东工业大学 | A kind of magnetic field heat treatment process improving iron based nano crystal high-gradient magnetism energy |
| CN109754974A (en) * | 2019-03-07 | 2019-05-14 | 中国科学院宁波材料技术与工程研究所 | A kind of nanometer crystal alloy magnetic core and preparation method thereof |
| CN109801783A (en) * | 2019-02-15 | 2019-05-24 | 信维通信（江苏）有限公司 | A kind of preparation method of the amorphous antifreeze plate for wireless charging |
| CN109817442A (en) * | 2019-02-01 | 2019-05-28 | 信维通信（江苏）有限公司 | A kind of nanocrystalline antifreeze plate and preparation method thereof |
| CN110581014A (en) * | 2019-08-16 | 2019-12-17 | 蓝沛光线（上海）电子科技有限公司 | Anti-saturation magnetic-isolating sheet and preparation method thereof |
| CN111341545A (en) * | 2020-03-23 | 2020-06-26 | 大连北方互感器集团有限公司 | Manufacturing process of transformer iron core |
| CN112831641A (en) * | 2021-01-07 | 2021-05-25 | 山东大学 | Heat treatment method for preparing nanocrystalline magnetic core |
| CN113388721A (en) * | 2021-06-12 | 2021-09-14 | 深圳市驭能科技有限公司 | Magnetic field shielding sheet and preparation method and application thereof |
| CN114058810A (en) * | 2021-11-18 | 2022-02-18 | 安徽中环晶研新材料有限公司 | Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy |
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| CN108541208A (en) * | 2018-04-25 | 2018-09-14 | 邵爽 | The preparation method of wireless charging electromagnetic shielding piece |
| CN108447674A (en) * | 2018-04-28 | 2018-08-24 | 深圳市信维通信股份有限公司 | A kind of wireless charging transmitting-receiving module preparation process and wireless charging receive and dispatch module |
| CN109735688A (en) * | 2018-12-24 | 2019-05-10 | 广东工业大学 | A kind of magnetic field heat treatment process improving iron based nano crystal high-gradient magnetism energy |
| CN109817442A (en) * | 2019-02-01 | 2019-05-28 | 信维通信（江苏）有限公司 | A kind of nanocrystalline antifreeze plate and preparation method thereof |
| CN109801783A (en) * | 2019-02-15 | 2019-05-24 | 信维通信（江苏）有限公司 | A kind of preparation method of the amorphous antifreeze plate for wireless charging |
| CN109666787A (en) * | 2019-02-20 | 2019-04-23 | 中山市董泽粉末涂料有限公司 | A kind of preceding heat treatment method of ferrous alloy band solidification |
| CN109754974A (en) * | 2019-03-07 | 2019-05-14 | 中国科学院宁波材料技术与工程研究所 | A kind of nanometer crystal alloy magnetic core and preparation method thereof |
| CN110581014A (en) * | 2019-08-16 | 2019-12-17 | 蓝沛光线（上海）电子科技有限公司 | Anti-saturation magnetic-isolating sheet and preparation method thereof |
| CN111341545A (en) * | 2020-03-23 | 2020-06-26 | 大连北方互感器集团有限公司 | Manufacturing process of transformer iron core |
| CN111341545B (en) * | 2020-03-23 | 2021-09-14 | 大连北方互感器集团有限公司 | Manufacturing process of transformer iron core |
| CN112831641A (en) * | 2021-01-07 | 2021-05-25 | 山东大学 | Heat treatment method for preparing nanocrystalline magnetic core |
| CN113388721A (en) * | 2021-06-12 | 2021-09-14 | 深圳市驭能科技有限公司 | Magnetic field shielding sheet and preparation method and application thereof |
| CN114058810A (en) * | 2021-11-18 | 2022-02-18 | 安徽中环晶研新材料有限公司 | Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy |
| CN114058810B (en) * | 2021-11-18 | 2023-06-23 | 安徽中环晶研新材料有限公司 | Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy |
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