CN115094223A - Heat treatment method of soft magnetic material for wireless charging shielding plate - Google Patents
Heat treatment method of soft magnetic material for wireless charging shielding plate Download PDFInfo
- Publication number
- CN115094223A CN115094223A CN202210689962.7A CN202210689962A CN115094223A CN 115094223 A CN115094223 A CN 115094223A CN 202210689962 A CN202210689962 A CN 202210689962A CN 115094223 A CN115094223 A CN 115094223A
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat treatment
- heat preservation
- stage
- soft magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000000696 magnetic material Substances 0.000 title claims abstract description 18
- 238000004321 preservation Methods 0.000 claims abstract description 94
- 230000008569 process Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 30
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 36
- 238000003672 processing method Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010024796 Logorrhoea Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Networks & Wireless Communication (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides a heat treatment method of a soft magnetic material for a wireless charging shielding plate, which relates to the technical field of heat treatment of shielding plate materials and comprises the following steps: step S1, winding: providing a soft magnetic alloy strip, and winding the soft magnetic alloy strip into a coiled material; step S2, heat treatment: and (4) carrying out heat treatment on the coiled material obtained in the step (S1), wherein the heat treatment process comprises at least one temperature rise stage, a heat preservation stage is correspondingly executed after each temperature rise stage, and a temperature reduction stage is executed finally. The wireless charging shielding sheet is prepared from the nanocrystalline soft magnetic material with high saturation magnetic induction intensity, has excellent soft magnetic performance, low magnetic permeability attenuation degree and strong anti-saturation capacity under a high-frequency condition, controls the magnetic permeability of the electromagnetic shielding sheet after magnetic crushing within a certain range, and has good consistency and stability of shielding effect; the heat treatment process is simple in flow, convenient to operate and easy to realize industrialization; the heat treatment process can be adjusted according to requirements, and the application range is wide.
Description
Technical Field
The invention relates to the technical field of heat treatment of shielding sheet materials, in particular to a heat treatment method of a soft magnetic material for a wireless charging shielding sheet.
Background
With the rapid development of scientific technology and the application of electronic equipment, people increasingly depend on the electronic equipment in life. The traditional electronic equipment mainly depends on a data line for charging, and the experience of customers is poor due to the problems of long line or short line, inconvenient charging position, incapability of charging at any time and the like. In view of the above problems, the wireless charging technology has been developed rapidly in recent years, and wireless charging is convenient and fast, high in safety and more intelligent in charging. At present, the electric toothbrush, the wireless telephone, the smart phone, the electric automobile and other fields are widely applied. However, many technical difficulties are encountered in the development process, such as improvement of charging efficiency, reduction of cost and too short effective charging distance.
The continuous improvement of the charging efficiency is always a pursued target in the wireless charging industry, and in order to obtain high charging efficiency, an electromagnetic shielding sheet is generally adopted to reduce and eliminate the influence of an electromagnetic field on a mobile phone. The electromagnetic shielding sheet has the function of isolating electromagnetic waves, and prevents materials such as metal and the like from absorbing the electromagnetic waves emitted by the transmitting terminal equipment and generating a magnetic field in the opposite direction. In the wireless charging receiving end of the mobile phone, if the electromagnetic shielding sheet is not arranged, the wireless charging equipment cannot complete short-distance charging work. The current wireless shielding piece that charges mostly adopts soft magnetic material to prepare, though has certain promotion to charge efficiency, but its under the high frequency condition, soft magnetic material's magnetic conductivity decay is serious, and can not realize garrulous magnetism back electromagnetic shield piece magnetic conductivity control in certain extent, influences electromagnetic shield piece's overall efficiency. When the electromagnetic shielding sheet is used for electronic equipment, performance parameters of the shielding sheet are required to be determined according to specific application scenes to meet the requirements, but the shielding performance of the soft magnetic material cannot be fully exerted by the existing heat treatment process of the soft magnetic material. Generally speaking, the wireless charging technology is not mature at present, and the charging efficiency is low due to poor performance of the shielding sheet.
Therefore, a further improvement is needed to overcome the defects of the heat treatment process of the soft magnetic material for the electromagnetic shielding sheet.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a heat treatment method of a soft magnetic material for a wireless charging shielding plate, which comprises the following steps:
step S1, winding: providing a soft magnetic alloy strip, and winding the soft magnetic alloy strip into a coiled material;
step S2, heat treatment: and (4) carrying out heat treatment on the coiled material obtained in the step (S1), wherein the heat treatment process comprises at least one temperature rise stage, a heat preservation stage is correspondingly executed after each temperature rise stage, and a temperature reduction stage is executed finally.
Preferably, the soft magnetic alloy strip is a nanocrystalline strip with the saturation magnetic induction intensity of more than or equal to 1.65T.
Preferably, if the temperature raising stage is one time, the heat treatment process in step S2 includes:
step S21a, temperature increasing stage: heating from normal temperature or room temperature to a preset heat preservation temperature within a preset heating time;
step S22a, heat preservation stage: keeping the preset heat preservation temperature for a preset heat preservation time;
step S23a, cooling stage: and cooling from the preset heat preservation temperature to a preset cooling temperature.
Preferably, the preset temperature rise time is 100min-140min, the preset heat preservation temperature is 360 ℃ to 420 ℃, and the preset heat preservation time is 90min-140 min.
Preferably, the preset cooling temperature is 150 ℃ or lower.
Preferably, if the temperature raising stage is two times, the heat treatment process in step S2 includes:
step S21b, first temperature increasing stage: heating from normal temperature or room temperature to a first heat preservation temperature within a first heating time;
step S22b, first heat preservation stage: maintaining the first holding temperature for a first holding time;
step S23b, second temperature increasing stage: raising the temperature from the first heat preservation temperature to a second heat preservation temperature within a second temperature raising time;
step S24b, a second heat preservation stage: maintaining the second heat preservation temperature for a second heat preservation time;
step S25b, cooling stage: cooling from the second heat preservation temperature to a cooling temperature.
Preferably, the first temperature rise time is 50min-120min, the first heat preservation temperature is 300 ℃ to 360 ℃, and the first heat preservation time is 20min-60 min.
Preferably, the second temperature rise time is 30min to 80min, the second heat preservation temperature is 360 ℃ to 420 ℃, and the second heat preservation time is 90min to 140 min.
Preferably, the cooling temperature is 150 ℃ or lower.
Preferably, in step S2, the coil is placed in a vacuum heat treatment furnace for heat treatment.
The technical scheme has the following advantages or beneficial effects:
1) the wireless charging shielding sheet is prepared from the nanocrystalline soft magnetic material with high saturation magnetic induction intensity, has excellent soft magnetic performance, low magnetic permeability attenuation degree and strong anti-saturation capacity under a high-frequency condition, controls the magnetic permeability of the electromagnetic shielding sheet after magnetic crushing within a certain range, and has good consistency and stability of shielding effect;
2) the heat treatment process is simple in flow, convenient to operate and easy to realize industrialization;
3) the heat treatment process can be adjusted according to requirements, the application range is wide, when the coil charging amount is small, the coil heating amount is small, the temperature in the furnace is uniform, the product performance is stable, and the heat treatment process of once heating and once heat preservation can be adopted; under the condition of large coil loading quantity, the phenomenon of temperature rush can be caused due to large heat release quantity of the coil, so that the temperature in the furnace body is not uniform, the product performance is unstable, the difference is large, a heat treatment process of twice temperature rise and twice heat preservation can be adopted to slow down the temperature rise rate, the heat exchange in the coil is uniform, the temperature in the furnace is uniform, and the product performance is stable.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for heat-treating a soft magnetic material for a wireless charging shield according to a preferred embodiment of the present invention;
FIG. 2 is a schematic flow chart of a heat treatment process with one temperature raising stage according to a preferred embodiment of the present invention;
FIG. 3 is a schematic flow chart of the heat treatment process in which the temperature raising stage is performed twice according to the preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be made within the scope of the present invention as long as the gist of the present invention is satisfied.
In accordance with the above-mentioned problems of the prior art, there is provided a method for heat-treating a soft magnetic material for a wireless charging shielding plate, as shown in fig. 1, including:
step S1, winding: providing a soft magnetic alloy strip, and winding the soft magnetic alloy strip into a coiled material;
step S2, heat treatment: and (4) carrying out heat treatment on the coiled material obtained in the step (S1), wherein the heat treatment process comprises at least one temperature rise stage, a heat preservation stage is correspondingly executed after each temperature rise stage, and a temperature reduction stage is executed finally.
In the preferred embodiment of the invention, the soft magnetic alloy strip is a nanocrystalline strip with the saturation induction density being more than or equal to 1.65T.
In a preferred embodiment of the present invention, the temperature raising stage is one time, as shown in fig. 2, the heat treatment process in step S2 includes:
step S21a, temperature increasing stage: heating from normal temperature or room temperature to a preset heat preservation temperature within a preset heating time;
step S22a, heat preservation stage: keeping the preset heat preservation temperature for a preset heat preservation time;
step S23a, cooling stage: cooling from the preset heat preservation temperature to a preset cooling temperature.
In a preferred embodiment of the invention, the preset temperature rise time is 100min-140min, the preset heat preservation temperature is 360-420 ℃, and the preset heat preservation time is 90min-140 min.
Specifically, in this embodiment, when the coil charging amount is small, the performance of the uniform product with uniform temperature in the furnace is stable due to the small heat release amount of the coil, and the heat treatment process with one-time temperature rise and one-time heat preservation can be adopted, so that the heat treatment efficiency is effectively improved.
In a preferred embodiment of the present invention, the predetermined cooling temperature is below 150 ℃.
Specifically, in the embodiment, since the content of Fe in the alloy component in the soft magnetic alloy strip is high, the temperature is too high and is easily oxidized, so the preset cooling temperature is controlled below 150 ℃. It can be understood that after the coiled material is cooled from the preset heat preservation temperature to the preset cooling temperature, the coiled material is discharged out of the furnace, and then the coiled material is air-cooled to the normal temperature, so that the whole heat treatment process of the coiled material is completed.
In a preferred embodiment of the present invention, the temperature-raising stage is two times, as shown in fig. 3, and the heat treatment process in step S2 includes:
step S21b, first temperature increasing stage: heating from normal temperature or room temperature to a first heat preservation temperature within a first heating time;
step S22b, first heat preservation stage: maintaining the first heat preservation temperature for a first heat preservation time;
step S23b, second temperature increasing stage: raising the temperature from the first heat preservation temperature to a second heat preservation temperature within a second temperature raising time;
step S24b, a second heat preservation stage: keeping the second heat preservation temperature for a second heat preservation time;
step S25b, cooling stage: cooling from the second heat preservation temperature to a cooling temperature.
Specifically, in this embodiment, under the condition that the coil charging amount is large, the coil heating amount is large, so that the temperature rush phenomenon is caused, the temperature inside the furnace body is not uniform, the product performance is unstable, the difference is large, the heat treatment process of twice heating and twice heat preservation can be adopted to slow down the heating rate, so that the heat exchange inside the coil is uniform, the temperature inside the furnace is uniform, and the product performance is stable.
In the preferred embodiment of the invention, the first temperature rise time is 50min-120min, the first heat preservation temperature is 300 ℃ -360 ℃, and the first heat preservation time is 20min-60 min.
In the preferred embodiment of the invention, the second temperature rise time is 30min-80min, the second heat preservation temperature is 360-420 ℃, and the second heat preservation time is 90min-140 min.
In a preferred embodiment of the present invention, the cooling temperature is 150 ℃ or lower.
Specifically, in the embodiment, since the content of Fe in the alloy component in the soft magnetic alloy strip is high, the temperature is too high and is easily oxidized, and therefore, the cooling temperature is controlled below 150 ℃. It can be understood that after the coil is cooled from the second heat preservation temperature to the cooling temperature, the coil is discharged out of the furnace, and then the coil is air-cooled to the normal temperature, so that the whole heat treatment process of the coil is completed.
In the preferred embodiment of the present invention, in step S2, the coil is placed in a vacuum heat treatment furnace for heat treatment.
Example 1
A heat treatment method of a soft magnetic material for a wireless charging shielding plate comprises the following steps:
step S1, winding: winding a nanocrystalline soft magnetic alloy strip with saturation magnetic induction intensity Bs being more than or equal to 1.65T into a coiled material;
step S2, heat treatment: and (4) placing the coiled material obtained in the step (S1) into a vacuum heat treatment furnace, and carrying out heat treatment according to a primary heating stage, a primary heat preservation stage and a primary cooling stage, wherein the specific steps are as follows:
a temperature rising stage: heating from room temperature to 340 deg.C for 120 min;
and (3) a heat preservation stage: preserving the heat for 30min at 340 ℃;
and (3) cooling: after the heat preservation is finished, the temperature is cooled to below 120 ℃ along with the air cooling of the furnace body, and the coiled material is cooled to normal temperature after being discharged, so that the heat treatment process of the whole coiled material is finished.
The performance of the coil subjected to the heat treatment in the above example 1 was tested, and the test method was: winding a single turn of enameled copper wire on the coiled material, testing the inductance of the coiled material under the conditions of 1kHz, 100kHz and 150kHz by using an impedance analyzer, and calculating to obtain the magnetic permeability mu of the frequency bands to be 5007, 4672 and 4661 respectively.
Example 2
A heat treatment method of a soft magnetic material for a wireless charging shielding plate comprises the following steps:
step S1, winding: winding a nanocrystalline soft magnetic alloy strip with saturation magnetic induction intensity Bs being more than or equal to 1.65T into a coiled material;
step S2, heat treatment: and (4) placing the coiled material obtained in the step (S1) into a vacuum heat treatment furnace, and carrying out heat treatment according to two temperature rising stages, two heat preservation stages and one temperature reduction stage, wherein the specific steps are as follows:
a first temperature rise stage: heating from room temperature to the first heat preservation temperature of 320 ℃, wherein the heating time is 100 min;
a first heat preservation stage: preserving the heat for 30min under the condition of the first heat preservation temperature;
a second temperature rising stage: heating from the first heat preservation temperature of 320 ℃ to the second heat preservation temperature of 360 ℃ for 50 min;
and a second heat preservation stage: and keeping the temperature for 120min at the second heat preservation temperature.
And (3) cooling: after the heat preservation is finished, the temperature is cooled to below 120 ℃ along with the air cooling of the furnace body, and the coiled material is cooled to the normal temperature after being taken out of the furnace, so that the heat treatment process of the whole coiled material is finished.
The performance of the coil subjected to the heat treatment in the above example 2 was tested, and the test method was: winding a single turn of enameled copper wire on the coiled material, testing the inductance of the enameled copper wire under the conditions of 1kHz, 100kHz and 150kHz by using an impedance analyzer, and calculating to obtain the magnetic permeability mu of the frequency bands as 5017, 4688 and 4670 respectively.
Comparative example 1
The same soft magnetic alloy strip as in example 1 was selected, and the specific steps were as follows:
step S1, winding the core as in S1 of example 1;
step S2, heat treatment: and (4) placing the coiled material obtained in the step (S1) into a vacuum heat treatment furnace, and carrying out heat treatment according to a third temperature rise stage, a third heat preservation stage and a first temperature reduction stage, wherein the specific steps are as follows:
a first temperature rise stage: heating from room temperature to 280 ℃ of first heat preservation temperature, wherein the heating time is 100 min;
a first heat preservation stage: preserving the heat for 30min under the condition of the first heat preservation temperature;
a second temperature rising stage: heating from the first heat preservation temperature of 280 ℃ to the second heat preservation temperature of 360 ℃ for 50 min;
and a second heat preservation stage: and keeping the temperature for 60min at the second heat preservation temperature.
A third temperature rise stage: heating from the second heat preservation temperature of 360 ℃ to the third heat preservation temperature of 420 ℃ for 50 min;
and a third heat preservation stage: and keeping the temperature for 100min at the third heat preservation temperature.
And (3) cooling: after the heat preservation is finished, the temperature is cooled to below 120 ℃ along with the air cooling of the furnace body, and the coiled material is cooled to the normal temperature after being taken out of the furnace, so that the heat treatment process of the whole strip is finished.
Using the same performance test conditions of example 1, the performance parameters obtained are shown in Table 1 below.
Comparative example 2
The same soft magnetic alloy strip as in example 1 was selected, and the specific steps were as follows:
step S1, winding the core as in S1 of example 1;
step S2, the specific process of heat treatment is as in S2 in example 1, only the temperature of the cooling stage is different from that of example 1, and comparative example 2 is to cool the coil to below 300 ℃ and discharge the coil, and wind cool the coil to normal temperature after discharging, thereby completing the heat treatment process of the whole strip.
Using the same performance test conditions of example 1, the performance parameters obtained are shown in Table 1 below. It can be seen that the performance is closer to that of example 1, but because the content of Fe in the alloy components of the strip is high, the appearance surface of the strip has an oxidation phenomenon, and the subsequent application of the strip to products is adversely affected.
Comparative example 3
The strip material different from example 1, the common 1K107B strip material was selected and wound to obtain a coil, the heat treatment process and the steps thereof were completely the same as example 1, the same performance test conditions as example 1 were adopted, and the obtained performance parameters are shown in table 1 below.
TABLE 1 Property parameters of the thermally treated nanocrystalline coils of examples 1-2 and comparative examples 1-3
As can be seen from table 1, when the nanocrystalline soft magnetic material with a high Bs value is used as the wireless charging shielding sheet, and the heat treatment adopts a one-time heating process, a one-time heat preservation process or a two-time heating process and a two-time heat preservation process, the wireless charging shielding sheet has excellent soft magnetic performance, low magnetic permeability attenuation degree, strong anti-saturation capacity, and good consistency and stability of shielding effect for controlling the magnetic permeability of the electromagnetic shielding sheet after magnetic crushing in a certain range.
The heat treatment process of the wireless charging shielding piece is simple, convenient to operate and easy to realize industrialization.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A heat treatment method of a soft magnetic material for a wireless charging shielding sheet is characterized by comprising the following steps:
step S1, winding: providing a soft magnetic alloy strip, and winding the soft magnetic alloy strip into a coiled material;
step S2, heat treatment: and (4) performing heat treatment on the coiled material obtained in the step (S1), wherein the heat treatment process comprises at least one temperature rise stage, a heat preservation stage is correspondingly executed after each temperature rise stage, and a temperature reduction stage is executed finally.
2. The heat treatment method according to claim 1, wherein the soft magnetic alloy strip is a nanocrystalline strip with a saturation induction of 1.65T or more.
3. The heat treatment method according to claim 1, wherein the temperature raising stage is one time, and the process of the heat treatment in the step S2 includes:
step S21a, temperature increasing stage: heating from normal temperature or room temperature to a preset heat preservation temperature within a preset heating time;
step S22a, heat preservation stage: keeping the preset heat preservation temperature for a preset heat preservation time;
step S23a, cooling stage: and cooling from the preset heat preservation temperature to a preset cooling temperature.
4. The heat treatment method according to claim 3, wherein the preset temperature rise time is 100min to 140min, the preset heat preservation temperature is 360 ℃ to 420 ℃, and the preset heat preservation time is 90min to 140 min.
5. The thermal processing method according to claim 3, wherein the preset cooling temperature is 150 ℃ or lower.
6. The heat treatment method according to claim 1, wherein the temperature raising stage is two times, and the process of the heat treatment in the step S2 includes:
step S21b, first temperature increasing stage: heating from normal temperature or room temperature to a first heat preservation temperature within a first heating time;
step S22b, first heat preservation stage: maintaining the first holding temperature for a first holding time;
step S23b, second temperature increasing stage: increasing the temperature from the first heat preservation temperature to a second heat preservation temperature within a second temperature rise time;
step S24b, a second heat preservation stage: maintaining the second heat preservation temperature for a second heat preservation time;
step S25b, cooling stage: cooling from the second heat preservation temperature to a cooling temperature.
7. The heat treatment method according to claim 6, wherein the first temperature rise time is 50min to 120min, the first holding temperature is 300 ℃ to 360 ℃, and the first holding time is 20min to 60 min.
8. The heat treatment method according to claim 6, wherein the second temperature rise time is 30min to 80min, the second heat preservation temperature is 360 ℃ to 420 ℃, and the second heat preservation time is 90min to 140 min.
9. The heat treatment method according to claim 6, wherein the cooling temperature is 150 ℃ or lower.
10. The heat treatment method according to claim 1, wherein in the step S2, the coil is heat-treated in a vacuum heat treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689962.7A CN115094223B (en) | 2022-06-17 | Heat treatment method of soft magnetic material for wireless charging shielding sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689962.7A CN115094223B (en) | 2022-06-17 | Heat treatment method of soft magnetic material for wireless charging shielding sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115094223A true CN115094223A (en) | 2022-09-23 |
| CN115094223B CN115094223B (en) | 2024-06-04 |
Family
ID=
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489555A (en) * | 2013-09-11 | 2014-01-01 | 南京航空航天大学 | Iron-based nano-crystalline soft magnetic alloy and method for manufacturing same |
| CN105088107A (en) * | 2014-05-09 | 2015-11-25 | 中国科学院宁波材料技术与工程研究所 | Fe-based amorphous alloy with high saturation magnetic induction intensity and strong amorphous forming ability |
| CN106555047A (en) * | 2016-11-23 | 2017-04-05 | 宜春学院 | The heat treatment method of iron-base nanometer crystal alloy soft magnetic ribbon |
| KR20170082468A (en) * | 2016-01-06 | 2017-07-14 | 한양대학교 에리카산학협력단 | Method for manufacturing Fe based soft magnetic alloy |
| KR20170082469A (en) * | 2016-01-06 | 2017-07-14 | 한양대학교 에리카산학협력단 | Soft magnetic alloy, method for manufacturing thereof and magnetic materials comprising the same |
| CN107365950A (en) * | 2017-07-24 | 2017-11-21 | 广东咏旺新材料科技有限公司 | Fe Si B Nb Cu are Fe-based amorphous/nanocrystalline magnetically soft alloy material and preparation and Technology for Heating Processing |
| CN109234628A (en) * | 2018-10-23 | 2019-01-18 | 中国科学院宁波材料技术与工程研究所 | A kind of preparation method of low-loss nano-crystal soft magnetic alloy |
| CN109559883A (en) * | 2018-12-26 | 2019-04-02 | 江西大有科技有限公司 | The preparation method of high and low temperature stability soft magnetic alloy core |
| 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 |
| CN109837452A (en) * | 2019-01-23 | 2019-06-04 | 信维通信（江苏）有限公司 | A kind of high Bs nanocrystalline material and preparation method thereof |
| KR20200132738A (en) * | 2019-05-17 | 2020-11-25 | 인제대학교 산학협력단 | Fe BASED NANO-STRUCTURED SOFT MAGNETIC ALLOY RIBBON AND METHOD FOR PREPARING THE SAME |
| WO2021010714A1 (en) * | 2019-07-12 | 2021-01-21 | 주식회사 아모그린텍 | Method for manufacturing fe-based soft magnetic alloy and fe-based soft magnetic alloy manufactured thereby |
| CN112951579A (en) * | 2021-01-29 | 2021-06-11 | 佛山市中研非晶科技股份有限公司 | Heat treatment method for residual magnetism of iron-based nanocrystalline magnetic core |
| CN113284690A (en) * | 2021-05-25 | 2021-08-20 | 深圳市驭能科技有限公司 | Nanocrystalline magnetic conductive sheet for high-power wireless charging and preparation method thereof |
| CN114050045A (en) * | 2021-11-30 | 2022-02-15 | 横店集团东磁股份有限公司 | Nanocrystalline special-shaped magnetic core and shaping method and application thereof |
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489555A (en) * | 2013-09-11 | 2014-01-01 | 南京航空航天大学 | Iron-based nano-crystalline soft magnetic alloy and method for manufacturing same |
| CN105088107A (en) * | 2014-05-09 | 2015-11-25 | 中国科学院宁波材料技术与工程研究所 | Fe-based amorphous alloy with high saturation magnetic induction intensity and strong amorphous forming ability |
| KR20170082468A (en) * | 2016-01-06 | 2017-07-14 | 한양대학교 에리카산학협력단 | Method for manufacturing Fe based soft magnetic alloy |
| KR20170082469A (en) * | 2016-01-06 | 2017-07-14 | 한양대학교 에리카산학협력단 | Soft magnetic alloy, method for manufacturing thereof and magnetic materials comprising the same |
| CN106555047A (en) * | 2016-11-23 | 2017-04-05 | 宜春学院 | The heat treatment method of iron-base nanometer crystal alloy soft magnetic ribbon |
| CN107365950A (en) * | 2017-07-24 | 2017-11-21 | 广东咏旺新材料科技有限公司 | Fe Si B Nb Cu are Fe-based amorphous/nanocrystalline magnetically soft alloy material and preparation and Technology for Heating Processing |
| CN109234628A (en) * | 2018-10-23 | 2019-01-18 | 中国科学院宁波材料技术与工程研究所 | A kind of preparation method of low-loss nano-crystal soft magnetic alloy |
| CN109559883A (en) * | 2018-12-26 | 2019-04-02 | 江西大有科技有限公司 | The preparation method of high and low temperature stability soft magnetic alloy core |
| CN109837452A (en) * | 2019-01-23 | 2019-06-04 | 信维通信（江苏）有限公司 | A kind of high Bs nanocrystalline material 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 |
| KR20200132738A (en) * | 2019-05-17 | 2020-11-25 | 인제대학교 산학협력단 | Fe BASED NANO-STRUCTURED SOFT MAGNETIC ALLOY RIBBON AND METHOD FOR PREPARING THE SAME |
| WO2021010714A1 (en) * | 2019-07-12 | 2021-01-21 | 주식회사 아모그린텍 | Method for manufacturing fe-based soft magnetic alloy and fe-based soft magnetic alloy manufactured thereby |
| CN112951579A (en) * | 2021-01-29 | 2021-06-11 | 佛山市中研非晶科技股份有限公司 | Heat treatment method for residual magnetism of iron-based nanocrystalline magnetic core |
| CN113284690A (en) * | 2021-05-25 | 2021-08-20 | 深圳市驭能科技有限公司 | Nanocrystalline magnetic conductive sheet for high-power wireless charging and preparation method thereof |
| CN114050045A (en) * | 2021-11-30 | 2022-02-15 | 横店集团东磁股份有限公司 | Nanocrystalline special-shaped magnetic core and shaping method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112951579B (en) | Heat treatment method for residual magnetism of iron-based nanocrystalline magnetic core | |
| CN102363830B (en) | Heat treatment method for ultracrystalline magnetic core | |
| EP0179557B1 (en) | Improvements in or relating to magnetic powder compacts | |
| CN106504846B (en) | A kind of iron silicon-ferrite composite cores and preparation method thereof | |
| CN111057820B (en) | Efficient annealing method for improving comprehensive performance of iron-based amorphous alloy iron core | |
| CN102965478A (en) | Heat treatment method for iron-based amorphous strip | |
| CN112420307B (en) | Method for preparing soft magnetic composite material through phytic acid surface treatment | |
| CN109722517A (en) | A kind of high-performance Fe-based amorphous nanocrystalline alloy heat treatment method | |
| CN104103413A (en) | Method for preparing magnetic powder core with high-flux magnet ring performance | |
| CN115094223A (en) | Heat treatment method of soft magnetic material for wireless charging shielding plate | |
| CN115094223B (en) | Heat treatment method of soft magnetic material for wireless charging shielding sheet | |
| CN112927913A (en) | Ultrathin oriented silicon steel core and manufacturing method thereof | |
| CN103680818A (en) | Amorphous common mode inductor | |
| CN113388721B (en) | Magnetic field shielding sheet and preparation method and application thereof | |
| CN113451039B (en) | FeSi-based water atomized Fe-Si-Cr soft magnetic powder core and preparation method thereof | |
| CN108899152A (en) | A kind of more insulating layer iron silicon substrate soft magnetic-powder cores and preparation method thereof | |
| CN112391522A (en) | Heat treatment process method of nanocrystalline strip | |
| CN113066628A (en) | Soft magnetic metal powder surface coating treatment method and soft magnetic composite material | |
| CN117529076A (en) | Soft magnetic material heat treatment process of electromagnetic shielding sheet | |
| CN115274244A (en) | High-frequency high-magnetic-conductance nanocrystalline magnetic core and preparation method thereof | |
| CN116387010A (en) | Preparation method of iron-based nanocrystalline filter magnetic core | |
| CN210775622U (en) | Anti-interference power terminal instrument electromagnetic shielding shell | |
| CN112941290A (en) | Transverse magnetic treatment method of nanocrystalline magnetic core | |
| CN112695186B (en) | Heat treatment method of low-coercivity miniature soft magnetic ring | |
| CN114058810B (en) | Heat treatment method of high-performance iron-based amorphous nanocrystalline alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |