CN115020098B - Nanocrystallization-cladding integrated processing method for amorphous magnetic core - Google Patents
Nanocrystallization-cladding integrated processing method for amorphous magnetic core Download PDFInfo
- Publication number
- CN115020098B CN115020098B CN202210527122.0A CN202210527122A CN115020098B CN 115020098 B CN115020098 B CN 115020098B CN 202210527122 A CN202210527122 A CN 202210527122A CN 115020098 B CN115020098 B CN 115020098B
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- magnetic field
- amorphous
- coating
- pressure
- 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.)
- Active
Links
Images
Classifications
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention belongs to the technical field of soft magnetic material processing, and particularly relates to a nanocrystallization-cladding integrated processing method of an amorphous magnetic core. According to the nano-coating integrated processing method for the amorphous magnetic core, disclosed by the invention, the amorphous magnetic core combined with the coating material is processed by utilizing a magnetic field hot isostatic pressing process, so that the nano-coating and insulating layer coating processes of the amorphous magnetic core can be realized at the same time, the performance of the amorphous nano-crystalline magnetic core is obviously improved while the coating is controlled to be uniform and stable, and a finished magnetic core is obtained stably according to use requirements.
Description
Technical Field
The invention belongs to the technical field of soft magnetic material processing, and particularly relates to a nanocrystallization-cladding integrated processing method of an amorphous magnetic core.
Background
In recent years, amorphous nanocrystalline soft magnetic materials have led to extensive research by researchers. For example, the iron-based amorphous nanocrystalline soft magnetic material has excellent soft magnetic performance and low cost, and is widely applied to magnetic devices such as transformer cores and the like. Along with the continuous development of amorphous alloy, the application range of amorphous nanocrystalline soft magnetic materials is wider and wider, and the performance requirements on amorphous alloy are higher and higher.
Because the loss of the amorphous alloy magnetic material is gradually increased in the application process, the proportion of eddy current loss is increased, and the amorphous alloy magnetic material is more often required to work in an ultrahigh frequency environment when being applied in a power system, if the amorphous alloy magnetic material is not protected by a proper insulating material, the magnetic core is likely to generate interlayer breakdown, so that the magnetic core is scrapped and even a safety accident is caused. Therefore, a layer of insulating material must be coated on the surface of the amorphous magnetic core, so as to avoid scrapping of the magnetic core and effectively reduce eddy current loss. Meanwhile, in view of the fact that the amorphous magnetic core must be heat treated to have magnetic properties, many researchers currently use a magnetic field heat treatment furnace to heat treat the amorphous magnetic core to obtain an amorphous nanocrystalline magnetic core having excellent magnetic properties. However, the soft magnetic performance of the soft magnetic material is determined by the grain size and the volume fraction of the nanocrystals, and the conventional heat treatment furnace cannot meet the performance requirements of ensuring the grain size and increasing the volume fraction at the same time.
In addition, the existing method for preparing the amorphous nanocrystalline magnetic core mostly adopts a step-by-step processing mode that nanocrystallization is realized by carrying out magnetic field heat treatment firstly and then insulating layer coating is carried out by processes such as soaking, baking and the like, so that the defect that the process is too complicated exists, and the production time and the process cost are greatly wasted.
In view of this, the present application expects to develop a nanocrystallization-cladding integration method for processing an amorphous magnetic core by using a hot isostatic pressing technology, which not only comprehensively improves the performance of the amorphous nanocrystalline magnetic core, but also can realize uniform and stable coverage of the cladding, and effectively ensures the performance of the amorphous magnetic core material.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a nanocrystallization-cladding integrated processing method for an amorphous magnetic core, which not only comprehensively improves the performance of the amorphous nanocrystalline magnetic core, but also can realize uniform and stable cladding of the cladding, effectively ensures the performance of amorphous magnetic core materials, has simple and feasible process and effectively reduces the process cost;
the second technical problem to be solved by the invention is to provide a nano-coating integrated amorphous magnetic core material.
In order to solve the technical problems, the nano-coating integrated processing method of the amorphous magnetic core comprises the following steps:
(1) Taking a selected amorphous strip, and winding to form an amorphous magnetic core;
(2) Coating the amorphous magnetic core with the selected coating material to obtain a coated amorphous magnetic core;
(3) Loading the coated amorphous magnetic core into an adaptive sheath, and performing magnetic field hot isostatic pressing treatment;
(4) Stopping heating and keeping high pressure to continuously anneal the coated amorphous magnetic core;
(5) And taking out the coated amorphous magnetic core with the sheath, and removing the sheath to obtain the amorphous magnetic core.
Specifically, in the step (2), the coating step controls the coating thickness of the coating material to be 0.85-0.95 times of the preset coating thickness, so that the position of the component after being placed into the sheath is relatively stable, and meanwhile, a certain distance is reserved to facilitate the magnetic core to be placed into the sheath.
In particular, the cladding material comprises a mixture of filler and binder. According to an embodiment of the present invention, the coating material uses a mixed material of kaolin and silicone resin, and the kaolin and the emulsified silicone resin are poured into a modifier to be co-dissolved to form an insulating coating material with high heat resistance and adhesion.
Specifically, the coating process should be to mechanically coat the coating material on the surface of the magnetic core according to the need.
Specifically, in the step (3), the step of filling the cladding material into the sheath and performing compaction is further included to supplement the void generated by the compaction. Preferably, the filling and compaction processes are performed simultaneously to ensure uniform coverage of the filled coating material, the vibration frequency of the vibration table is set at 500-700Hz, and the vibration process is continued until the filling is finished.
Specifically, the internal shape of the sheath is the same as the shape of the magnetic core of the target finished product, and the sizes of the directions are the same.
Specifically, in the step (3), the step of performing the magnetic field hot isostatic pressing treatment includes a step of heating under an inert atmosphere; preferably under argon atmosphere;
the temperature is controlled to be 530-570 ℃, the pressure is 130-170MPa, and the magnetic field strength is 10-20KA/m.
Specifically, the step of performing the hot isostatic pressing treatment by using the magnetic field comprises the following steps: regulating system pressure to 130-170MPa and temperature to 380-420 ℃, and maintaining for 50-70min; then keeping the pressure unchanged, heating to 440-480 ℃, and applying magnetic field strength of 10-20KA/m for 230-250min; then the magnetic field is removed, and the temperature is raised to 530-570 ℃ for heat preservation for 50-70min.
Specifically, the step of performing the magnetic field hot isostatic pressing treatment is performed based on a magnetic field hot isostatic pressing device;
the magnetic field hot isostatic pressing equipment comprises a main frame, a high-pressure container, a magnetic field system, a temperature control system and a pressure control system;
the magnetic field system is movably fixed on the main frame to realize magnetic field control of the high-pressure container;
the temperature control system and the pressure control system are connected with the high-pressure container to control the temperature and the pressure of the high-pressure container.
Specifically, the magnetic field system comprises a permanent magnet, a transmission device and a fixing device;
the transmission device is fixed on the main frame, the fixing device is movably connected with the transmission device, and the permanent magnet is fixedly connected with the fixing device and can horizontally move along the transmission device.
Specifically, the temperature control system comprises a heating component arranged inside the high-pressure container, a cooling component arranged outside the high-pressure container and a temperature control component for controlling the temperature inside the high-pressure container.
Specifically, the pressure control system comprises a compressor, an air storage tank and a vacuum pump which are communicated through pipelines, wherein the compressor and the vacuum pump are respectively communicated with an air inlet and an air outlet of the high-pressure container, so that the pressure control of the high-pressure container is realized.
According to the nano-coating integrated processing method for the amorphous magnetic core, disclosed by the invention, the amorphous magnetic core combined with the coating material is processed by utilizing a magnetic field hot isostatic pressing process, so that the nano-coating and insulating layer coating processes of the amorphous magnetic core can be realized simultaneously, the performance of the amorphous nano-crystalline magnetic core is obviously improved while the coating is controlled to be uniform and stable, and the problem that the conventional heat treatment furnace cannot simultaneously meet two conditions of ensuring the grain size and increasing the volume fraction can be effectively solved according to the use requirement.
According to the nano-cladding integrated processing method of the amorphous magnetic core, the saturation induction intensity of the amorphous nano-crystalline magnetic core is remarkably improved, the coercive force is reduced, and the comprehensive performance of the amorphous nano-crystalline magnetic core is improved; the method not only well ensures the stability of the amorphous magnetic core coating layer, but also can quantitatively control the thickness of the coating layer, and improves the performance of the coating layer by realizing densification treatment of the coating material. In particular, the method greatly simplifies the production process and effectively saves the time and labor cost.
According to the nano-cladding integrated processing method of the amorphous magnetic core, disclosed by the invention, the magnetic field hot isostatic pressing treatment is carried out on the basis of the magnetic field hot isostatic pressing equipment, the magnetic field can be flexibly added and removed to the magnetic core in the hot isostatic pressing equipment, and the magnetic field system is independently arranged outside the hot isostatic pressing equipment, so that the nano-cladding integrated processing method can be independently operated, and is convenient to operate and maintain.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which,
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic cross-sectional view of an untrimmed front jacketed magnetic core in accordance with one embodiment of the present invention, wherein the 21-core, 22-jacket, 23-core, 24-cladding;
FIG. 3 is a schematic diagram of a magnetic field hot isostatic pressing device according to the present invention; wherein, the reference numerals in the figures are as follows: the device comprises a main frame 1, a high-pressure container 2, a magnetic field system 3, a heating component 4, a thermocouple 5, a temperature control component 6, a cooling component 7, a hose 8, a compressor 9, a gas storage tank 10, a vacuum pump 11, a pressure gauge 12, a permanent magnet 13, a transmission device 14, a fixing device 15, a cooling liquid inlet 16, a cooling liquid outlet 17 and a throttle valve 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.
As shown in fig. 3, the magnetic field hot isostatic pressing device of the invention comprises a main frame 1, a high-pressure container 2, a magnetic field system 3, a temperature control system and a pressure control system, wherein the high-pressure container 2 is arranged below the main frame 1, the coated amorphous magnetic core to be processed is arranged inside the high-pressure container 2, and the magnetic field intensity, the temperature and the pressure of the coated amorphous magnetic core in the high-pressure container 2 are respectively regulated and controlled through the magnetic field system 3, the temperature control system and the pressure control system.
As shown in fig. 3, the magnetic field system 3 includes a permanent magnet 13, a transmission device 14 and a fixing device 15, where the transmission device 14 may be a ball screw transmission device, two ends of the transmission device are fixed on the main frame 1, and the fixing device 15 is movably installed on a screw of the transmission device 14, the permanent magnet 13 is fixed with the fixing device 15, the permanent magnet 13 is fixed on the fixing device 15 by using high-adhesive-strength AB glue, and the fixing device 15 can drive the permanent magnet 13 to move horizontally along the main frame 1 along with the transmission device 14, so as to apply and remove a magnetic field at a proper time in the hot isostatic pressing process.
As shown in fig. 3, the temperature control system includes a heating component 4 disposed inside the high-pressure container 2 and a cooling component 7 disposed outside the high-pressure container 2, so as to heat and cool the high-pressure container 2, and perform temperature monitoring through a thermocouple 5 disposed inside the high-pressure container 2, where the thermocouple 5 is connected with a temperature control component 6 disposed outside the high-pressure container 2, so as to further implement temperature control. The cooling assembly 7 is correspondingly provided with a cooling liquid inlet 16 and a cooling liquid outlet 17, so that the cooling liquid is cooled in a circulating way.
With the structure shown in fig. 3, the pressure control system comprises a compressor 9, an air storage tank 10 and a vacuum pump 11 which are communicated through a hose 8, wherein the hose 8 can be a flexible pipe. An air inlet and an air outlet are arranged below the high-pressure container 2 and are respectively connected with the compressor 9 and the vacuum pump 11 through hoses 8, wherein the air inlet is connected with the compressor 9, and the air outlet is sequentially connected with the vacuum pump 11 and the air storage tank 10. Pressure gauges 12 are mounted on each hose section 8 and a throttle valve 18 is mounted to control the gas supply. The pressure control system can adjust the pressure inside the high-pressure container 2 on the one hand, and simultaneously, argon is introduced into the high-pressure container 2 to realize the treatment under inert atmosphere, so as to achieve the purposes of refining the grain size of nano particles and improving the volume fraction of the nano particles, and generate a high-density phase, thereby greatly improving the performance of soft magnetic materials.
Example 1
The method for processing the amorphous magnetic core according to the present embodiment is described in detail by taking an annular amorphous magnetic core having an inner diameter of 20mm, an outer diameter of 30mm, a height of 10mm, and a coating thickness of 0.25mm as an example.
As shown in the processing flow chart of fig. 1, the nano-coating integrated processing method of the amorphous magnetic core according to the embodiment includes the following steps:
(1) Winding the selected amorphous strip conventionally to form an amorphous magnetic core with the required size for standby;
(2) Coating the amorphous magnetic core by using a coating material;
the coating process is to pour kaolin and emulsified organic silicon resin into a modifier together for co-dissolution to form an insulating coating material with high heat resistance and adhesiveness, uniformly bond the coating material on the surface of the amorphous magnetic core, wherein the organic silicon resin mainly plays roles of bonding and modifying kaolin, the insulating effect is mainly provided by the kaolin, and the kaolin and the organic silicon resin are mixed in a ratio of 7:3, mixing in proportion; the coating thickness of the coating material is preferably set to be 0.9 times of the coating thickness;
(3) Loading the coated amorphous magnetic core into a sheath and performing magnetic field hot isostatic pressing treatment;
as shown in fig. 2, the inner shape of the low-carbon steel sheath 22 is the same as that of the target finished magnetic core 21, the inner diameter is 30mm, the inner surface is 10mm high, and the low-carbon steel sheath can be matched with a graphite core mold 23 with the diameter of 20mm to control the shape of the finished product and the thickness of the coating; the thickness of the coating 24 is about 0.225mm in the bonding process before the coating is filled, so that the position of the magnetic core in the coating is relatively stable while the magnetic core is arranged in the coating;
after the coating amorphous magnetic core is filled into the sheath, the filling and compaction processes of the coating material are carried out simultaneously, and gaps generated by the compaction are filled with the same material as the coating during vibration so as to ensure that the coating material is uniformly distributed on the surface of the amorphous magnetic core, the frequency of a vibrating table is set at 600Hz, and the vibration process is continued until the coating material is filled into the sheath;
the magnetic field hot isostatic pressing treatment process in this embodiment is performed in a magnetic field hot isostatic pressing device as shown in fig. 3, and the magnetic field hot isostatic pressing treatment process is performed by pressurizing, heating and magnetically controlling the inside of the furnace by using a heating system while introducing argon, and specifically comprises the following implementation steps: (a) Placing the sheath with the magnetic core in a high-pressure container 2, and vacuumizing the high-pressure container 2 through a hose 8 by using a vacuum pump 11; (b) Introducing argon in an air storage tank 10 into a high-pressure container 2 through a hose 8 by a compressor 9, raising the pressure to 150MPa, heating the high-pressure container 2 to 400 ℃ by a heating assembly 4, and keeping for 60min; (c) Maintaining the pressure unchanged, heating to 460 ℃ by using the heating component 4, applying a transverse magnetic field of 15KA/m by using the magnetic field system 3, and simultaneously maintaining the temperature, the pressure and the magnetic field parameters for 240min; (d) The applied magnetic field is removed by the magnetic field system 3, and the temperature is continuously raised to 550 ℃ by the heating component 4 for heat preservation for 60min;
(4) Closing the heating system to keep pressure to anneal the magnetic core;
after the magnetic field hot isostatic pressing process is finished, the heating component 4 is closed, so that the magnetic core keeps a high-pressure state and naturally cools to room temperature along with the high-pressure container 2, and the annealing process is finished;
(5) Taking out the magnetic core with the sheath, and machining to remove the sheath and redundant corners;
and after the annealing is finished, releasing pressure, taking out the magnetic core, and machining the magnetic core with the sheath to remove the sheath and redundant corners to obtain a finished product.
Example 2
The method for processing the amorphous magnetic core according to the present embodiment is described in detail by taking an annular amorphous magnetic core having an inner diameter of 20mm, an outer diameter of 30mm, a height of 10mm, and a coating thickness of 0.25mm as an example.
As shown in the processing flow chart of fig. 1, the nano-coating integrated processing method of the amorphous magnetic core according to the embodiment includes the following steps:
(1) Winding the selected amorphous strip conventionally to form an amorphous magnetic core with the required size for standby;
(2) Coating the amorphous magnetic core by using a coating material;
the coating process is to pour kaolin and emulsified organic silicon resin into a modifier together for co-dissolution to form an insulating coating material with high heat resistance and adhesiveness, uniformly bond the coating material on the surface of the amorphous magnetic core, wherein the organic silicon resin mainly plays roles of bonding and modifying kaolin, the insulating effect is mainly provided by the kaolin, and the kaolin and the organic silicon resin are mixed in a ratio of 7:3, mixing in proportion; the coating thickness of the coating material is preferably set to be 0.9 times of the coating thickness;
(3) Loading the coated amorphous magnetic core into a sheath and performing magnetic field hot isostatic pressing treatment;
as shown in fig. 2, the inner shape of the low-carbon steel sheath 22 is the same as that of the target finished magnetic core 21, the inner diameter is 30mm, the inner surface is 10mm high, and the low-carbon steel sheath can be matched with a graphite core mold 23 with the diameter of 20mm to control the shape of the finished product and the thickness of the coating; the thickness of the coating 24 is about 0.225mm in the bonding process before the coating is filled, so that the position of the magnetic core in the coating is relatively stable while the magnetic core is arranged in the coating;
after the coating amorphous magnetic core is filled into the sheath, the filling and compaction processes of the coating material are carried out simultaneously, and gaps generated by the compaction are filled with the same material as the coating during vibration so as to ensure that the coating material is uniformly distributed on the surface of the amorphous magnetic core, the frequency of a vibrating table is set at 600Hz, and the vibration process is continued until the coating material is filled into the sheath;
the magnetic field hot isostatic pressing treatment process in this embodiment is performed in a magnetic field hot isostatic pressing device as shown in fig. 3, and the magnetic field hot isostatic pressing treatment process is performed by pressurizing, heating and magnetically controlling the inside of the furnace by using a heating system while introducing argon, and specifically comprises the following implementation steps: (a) Placing the sheath with the magnetic core in a high-pressure container 2, and vacuumizing the high-pressure container 2 through a hose 8 by using a vacuum pump 11; (b) Introducing argon in an air storage tank 10 into a high-pressure container 2 through a hose 8 by a compressor 9, raising the pressure to 130MPa, heating the high-pressure container 2 to 380 ℃ by a heating assembly 4, and keeping for 70min; (c) Maintaining the pressure unchanged, heating to 440 ℃ by using the heating component 4, applying a transverse magnetic field of 10KA/m by using the magnetic field system 3, and simultaneously maintaining the temperature, the pressure and the magnetic field parameters to act for 250min; (d) The applied magnetic field is removed by the magnetic field system 3, and the temperature is continuously raised to 530 ℃ by the heating component 4 for heat preservation for 70min;
(4) Closing the heating system to keep pressure to anneal the magnetic core;
after the magnetic field hot isostatic pressing process is finished, the heating component 4 is closed, so that the magnetic core keeps a high-pressure state and is cooled to room temperature along with the high-pressure container 2, and the annealing process is finished;
(5) Taking out the magnetic core with the sheath, and machining to remove the sheath and redundant corners;
and after the annealing is finished, releasing pressure, taking out the magnetic core, and machining the magnetic core with the sheath to remove the sheath and redundant corners to obtain a finished product.
Example 3
The method for processing the amorphous magnetic core according to the present embodiment is described in detail by taking an annular amorphous magnetic core having an inner diameter of 20mm, an outer diameter of 30mm, a height of 10mm, and a coating thickness of 0.25mm as an example.
As shown in the processing flow chart of fig. 1, the nano-coating integrated processing method of the amorphous magnetic core according to the embodiment includes the following steps:
(1) Winding the selected amorphous strip conventionally to form an amorphous magnetic core with the required size for standby;
(2) Coating the amorphous magnetic core by using a coating material;
the coating process is to pour kaolin and emulsified organic silicon resin into a modifier together for co-dissolution to form an insulating coating material with high heat resistance and adhesiveness, uniformly bond the coating material on the surface of the amorphous magnetic core, wherein the organic silicon resin mainly plays roles of bonding and modifying kaolin, the insulating effect is mainly provided by the kaolin, and the kaolin and the organic silicon resin are mixed in a ratio of 7:3, mixing in proportion; the coating thickness of the coating material is preferably set to be 0.9 times of the coating thickness;
(3) Loading the coated amorphous magnetic core into a sheath and performing magnetic field hot isostatic pressing treatment;
as shown in fig. 2, the inner shape of the low-carbon steel sheath 22 is the same as that of the target finished magnetic core 21, the inner diameter is 30mm, the inner surface is 10mm high, and the low-carbon steel sheath can be matched with a graphite core mold 23 with the diameter of 20mm to control the shape of the finished product and the thickness of the coating; the thickness of the coating 24 is about 0.225mm in the bonding process before the coating is filled, so that the position of the magnetic core in the coating is relatively stable while the magnetic core is arranged in the coating;
after the coating amorphous magnetic core is filled into the sheath, the filling and compaction processes of the coating material are carried out simultaneously, and gaps generated by the compaction are filled with the same material as the coating during vibration so as to ensure that the coating material is uniformly distributed on the surface of the amorphous magnetic core, the frequency of a vibrating table is set at 600Hz, and the vibration process is continued until the coating material is filled into the sheath;
the magnetic field hot isostatic pressing treatment process in this embodiment is performed in a magnetic field hot isostatic pressing device as shown in fig. 3, and the magnetic field hot isostatic pressing treatment process is performed by pressurizing, heating and magnetically controlling the inside of the furnace by using a heating system while introducing argon, and specifically comprises the following implementation steps: (a) Placing the sheath with the magnetic core in a high-pressure container 2, and vacuumizing the high-pressure container 2 through a hose 8 by using a vacuum pump 11; (b) Introducing argon in an air storage tank 10 into a high-pressure container 2 through a hose 8 by a compressor 9, raising the pressure to 170MPa, heating the high-pressure container 2 to 420 ℃ by a heating assembly 4, and keeping for 50min; (c) Maintaining the pressure unchanged, heating to 480 ℃ by using the heating component 4, applying a transverse magnetic field of 20KA/m by using the magnetic field system 3, and simultaneously maintaining the temperature, the pressure and the magnetic field parameters for 230min; (d) The applied magnetic field is removed by the magnetic field system 3, and the temperature is continuously raised to 570 ℃ by the heating component 4 for heat preservation for 50min;
(4) Closing the heating system to keep pressure to anneal the magnetic core;
after the magnetic field hot isostatic pressing process is finished, the heating component 4 is closed, so that the magnetic core keeps a high-pressure state and is cooled to room temperature along with the high-pressure container 2, and the annealing process is finished;
(5) Taking out the magnetic core with the sheath, and machining to remove the sheath and redundant corners;
and after the annealing is finished, releasing pressure, taking out the magnetic core, and machining the magnetic core with the sheath to remove the sheath and redundant corners to obtain a finished product.
Comparative example 1
The nano-coating processing method of the amorphous magnetic core according to the present comparative example is the same as that of example 1, and the only difference is that the magnetic field hot isostatic pressing treatment process of the step (3) specifically includes: placing the sheath with the magnetic core in a high-pressure container 2, and vacuumizing the high-pressure container 2 through a hose 8 by using a vacuum pump 11; introducing argon in an air storage tank 10 into a high-pressure container 2 through a hose 8 by a compressor 9 to raise the pressure to normal pressure, heating the high-pressure container 2 to 400 ℃ by a heating component 4, and keeping for 60min; maintaining the pressure unchanged, heating to 460 ℃ by using the heating component 4, applying a transverse magnetic field of 15KA/m by using the magnetic field system 3, and simultaneously maintaining the temperature, the pressure and the magnetic field parameters for 240min; the applied magnetic field is removed by the magnetic field system 3, and the temperature is continuously raised to 550 ℃ by the heating component 4 for heat preservation for 60min;
experimental example
The performance of the above examples and comparative examples were measured and compared, wherein:
the finished product obtained in the scheme of the embodiment 1 has the saturation magnetic flux density bs=1.68t, the coercive force hc=1.2a/m, high compactness of the coating material, no defect on the surface and the best overall comprehensive performance;
the saturated magnetic flux density bs=1.65t, the coercive force hc=1.4a/m of the finished product in the scheme of the embodiment 2 is slightly lower than that of the embodiment 1, the surface is free of defects, and the comprehensive performance is good;
the saturated magnetic flux density bs=1.66T, the coercive force hc=1.1A/m of the finished product in the scheme of the embodiment 3 is slightly higher than that of the embodiment 1, the surface is free of defects, and the comprehensive performance is good;
the saturation magnetic flux density bs=1.43t, the coercive force hc=5.3A/m, and the coating material density of the finished product of comparative example 1 were low, resulting in poor surface strength, hardness, and wear resistance.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (5)
1. The nano-coating integrated processing method of the amorphous magnetic core is characterized by comprising the following steps of:
(1) Taking an amorphous strip, and winding to form an amorphous magnetic core;
(2) Coating the amorphous magnetic core with a coating material to obtain a coated amorphous magnetic core;
(3) Loading the coated amorphous magnetic core into an adaptive sheath, and performing magnetic field hot isostatic pressing treatment;
(4) Stopping heating and keeping high pressure to continuously anneal the coated amorphous magnetic core;
(5) Taking out the coated amorphous magnetic core with the sheath, and removing the sheath to obtain the amorphous magnetic core;
wherein the step of subjecting the magnetic field to hot isostatic pressing comprises: regulating system pressure to 130-170MPa and temperature to 380-420 ℃, and maintaining for 50-70min; then keeping the pressure unchanged, heating to 440-480 ℃, and applying magnetic field strength of 10-20KA/m for 230-250min; then the magnetic field is removed, and the temperature is raised to 530-570 ℃ for heat preservation for 50-70min;
wherein in the step (2), the cladding step controls the cladding thickness of the cladding material to be 0.85-0.95 times of the preset cladding thickness; the coating material is formed by pouring kaolin and emulsified organic silicon resin into a modifier together with a kaolin and organic silicon resin mixed material;
in the step (3), the internal shape of the sheath is the same as the shape of the magnetic core of the target finished product, and the sizes of the directions are the same; further comprising the step of filling the sheath with the coating material and compacting.
2. The integrated nano-cladding processing method of an amorphous magnetic core according to claim 1, wherein the step of subjecting the amorphous magnetic core to magnetic field hot isostatic pressing is based on a magnetic field hot isostatic pressing device;
the magnetic field hot isostatic pressing equipment comprises a main frame (1), a high-pressure container (2), a magnetic field system (3), a temperature control system and a pressure control system;
the magnetic field system (3) is movably fixed on the main frame (1) to realize magnetic field control of the high-pressure container (2);
the temperature control system and the pressure control system are connected with the high-pressure container (2) to control the temperature and the pressure of the high-pressure container (2).
3. The integrated nano-cladding processing method of an amorphous magnetic core according to claim 2, wherein the magnetic field system (3) comprises a permanent magnet (13), a transmission (14) and a fixing device (15);
the transmission device (14) is fixed on the main frame (1), the fixing device (15) is movably connected with the transmission device (14), and the permanent magnet (13) is fixedly connected with the fixing device (15) and can horizontally move along the transmission device (14).
4. The integrated nano-cladding processing method of an amorphous magnetic core according to claim 2, wherein the temperature control system comprises a heating component (4) arranged inside the high-pressure container (2), a cooling component (7) arranged outside the high-pressure container (2), and a temperature control component (6) for controlling the temperature inside the high-pressure container (2).
5. The integrated processing method of the nano-coating of the amorphous magnetic core according to claim 2, wherein the pressure control system comprises a compressor (9), an air storage tank (10) and a vacuum pump (11) which are communicated through pipelines, and the compressor (9) and the vacuum pump (11) are respectively communicated with an air inlet and an air outlet of the high-pressure container (2) to realize pressure control of the high-pressure container (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210527122.0A CN115020098B (en) | 2022-05-16 | 2022-05-16 | Nanocrystallization-cladding integrated processing method for amorphous magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210527122.0A CN115020098B (en) | 2022-05-16 | 2022-05-16 | Nanocrystallization-cladding integrated processing method for amorphous magnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115020098A CN115020098A (en) | 2022-09-06 |
| CN115020098B true CN115020098B (en) | 2023-05-05 |
Family
ID=83069510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210527122.0A Active CN115020098B (en) | 2022-05-16 | 2022-05-16 | Nanocrystallization-cladding integrated processing method for amorphous magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115020098B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680917A (en) * | 2013-12-04 | 2014-03-26 | 铜陵三佳变压器有限责任公司 | Manufacturing method for nanocrystalline magnetic core for high-frequency electronic transformer |
| CN105719826A (en) * | 2016-01-22 | 2016-06-29 | 东南大学 | Magnetic-field heat treatment method of nanocrystal magnetic core |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030468B (en) * | 2007-01-12 | 2011-07-27 | 同济大学 | Production of amorphous nano-crystal block magnetic component |
| CN101028652A (en) * | 2007-01-12 | 2007-09-05 | 北京科技大学 | Magnetic-field temperature-pressure formation |
| CN105346129B (en) * | 2015-12-14 | 2017-03-22 | 董中天 | magnetic field isostatic pressing machine |
| CN108120285B (en) * | 2017-12-20 | 2019-07-30 | 大同新成新材料股份有限公司 | A kind of heat isostatic apparatus with graphite metal jacket |
| CN109094165B (en) * | 2018-06-27 | 2019-12-17 | 横店集团东磁股份有限公司 | Preparation method of nanocrystalline magnetic sheet for wireless charging |
| CN209974843U (en) * | 2019-05-13 | 2020-01-21 | 宁波中科毕普拉斯新材料科技有限公司 | Heat treatment equipment for nanocrystalline alloy strip |
| CN112927914B (en) * | 2021-01-21 | 2022-07-12 | 广州金磁海纳新材料科技有限公司 | Preparation method of high-permeability iron-based nanocrystalline magnetically soft alloy magnetic core |
-
2022
- 2022-05-16 CN CN202210527122.0A patent/CN115020098B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680917A (en) * | 2013-12-04 | 2014-03-26 | 铜陵三佳变压器有限责任公司 | Manufacturing method for nanocrystalline magnetic core for high-frequency electronic transformer |
| CN105719826A (en) * | 2016-01-22 | 2016-06-29 | 东南大学 | Magnetic-field heat treatment method of nanocrystal magnetic core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115020098A (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111455223B (en) | Aluminum-scandium alloy target material and preparation method thereof | |
| CN106757001A (en) | The method and apparatus that electromagnetic agitation auxiliary carries out laser melting coating under a kind of pressure cooler environment | |
| CN105002460B (en) | Electric current composite diffusion method continuously prepares the method and device of high-silicon steel thin strip | |
| CN103594243B (en) | Prevent the manufacture method that Sintered NdFeB magnet ftractures | |
| CN102226256B (en) | Preparation method of Fe66Co10Mo4P4C4B4Si3 block soft-magnetic nanocrystalline/amorphous composite material | |
| CN103745823A (en) | Preparation method for R-Fe-B-series sintering magnet | |
| CN103567445A (en) | Manufacturing method of molybdenum targets | |
| CN108580819B (en) | Vacuum induction melting cast sheet furnace, alloy cast sheet manufacturing method and alloy cast sheet | |
| JP2008297606A (en) | Method for manufacturing metal powder for dust core and dust core | |
| CN110246675B (en) | Soft magnetic composite material with high saturation magnetic flux density and low loss and preparation method thereof | |
| CN115020098B (en) | Nanocrystallization-cladding integrated processing method for amorphous magnetic core | |
| CN114346256B (en) | Variant energy density laser material-increasing method suitable for high-entropy alloy | |
| CN106521202B (en) | A kind of preparation method of molybdenum hafnium alloy plate | |
| CN108823447B (en) | Smelting and aging integrated furnace for preparing foam alloy | |
| CN104494027B (en) | Double vacuum bag microwave solidification methods of carbon fibre composite product | |
| JP2009032860A (en) | Dust core and iron-base powder for the same | |
| CN112908673B (en) | Ultrahigh-permeability iron-based nanocrystalline magnetically soft alloy magnetic core and heat treatment method thereof | |
| JP2009235517A (en) | Metal powder for dust core and method for producing dust core | |
| CN109014177A (en) | A kind of preparation method of insulating wrapped composite powder and transformer core | |
| CN110184553B (en) | Heat treatment method of TiZrVAl alloy with oxygen dissolved in solid | |
| CN116004951B (en) | Annealing platform and method for magnetic alloy ring | |
| CN114334422B (en) | Neodymium-iron-boron magnet and preparation method thereof | |
| KR102399214B1 (en) | Manufacturing apparatus for metal powder-based alloy plate and manufacturing method thereof | |
| LU500805B1 (en) | A method and product for enhancing the magnetic conductivity of iron-silicon soft magnetic cores by filling with iron-silicon nanoparticles | |
| CN112750612B (en) | Technological method for permeating terbium or dysprosium into neodymium iron boron surface |
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 | ||
| GR01 | Patent grant |