CN112349506A - Method for manufacturing powder magnetic core by insulating and curing amorphous powder at room temperature - Google Patents
Method for manufacturing powder magnetic core by insulating and curing amorphous powder at room temperature Download PDFInfo
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- CN112349506A CN112349506A CN202011039069.7A CN202011039069A CN112349506A CN 112349506 A CN112349506 A CN 112349506A CN 202011039069 A CN202011039069 A CN 202011039069A CN 112349506 A CN112349506 A CN 112349506A
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- powder
- amorphous powder
- magnetic core
- curing
- photosensitive resin
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/006—Amorphous articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention relates to a method for manufacturing a powder magnetic core by insulating and curing amorphous powder at room temperature, which adopts a thin-layer accumulation layered illumination curing process after mixing the amorphous powder with photosensitive resin and comprises the following steps: 1) weighing amorphous powder and photosensitive resin according to a certain proportion, placing into a photocuring rapid forming machine, and stirring for 5-10min to obtain a mixture; 2) uniformly and flatly coating the mixture on a photocuring forming vessel, wherein the thickness of the coating is 0.01mm-1 mm; 3) irradiating and curing for 10-15min by adopting an ultraviolet light source; 4) the steps 2) and 3) are repeated until the required powder magnetic core is prepared, the problem that the conventional hot processing technology is easy to cause product crystallization is solved, and the method has the characteristics of simple and convenient process control, energy conservation, convenience, rapidness and the like.
Description
Technical Field
The invention relates to the technical field of material processing and control, in particular to a method for manufacturing a powder magnetic core by insulating and solidifying amorphous powder at room temperature.
Background
With the development of electronic information technology, electronic products are being developed toward miniaturization, integration, intellectualization, low power consumption and high efficiency, so that the requirements on magnetic elements are higher and higher, and the performance requirements on materials for manufacturing the magnetic elements are higher and higher accordingly. The soft magnetic material has the characteristics of light weight, high power, high sensitivity and good stability, meets the requirements of high resistivity, high effective magnetic conductivity, high saturation magnetic induction intensity, low coercive force, low loss and low magnetocrystalline anisotropy of a magnetic element, and is one of the main materials for manufacturing the magnetic element at present.
The powder magnetic core is used as a novel composite soft magnetic material and is prepared by mixing ferromagnetic powder particles and an insulating medium through a powder metallurgy process. At present, the existing amorphous magnetic powder core in China is mainly formed by sintering or heat treatment (annealing) and other processes, and crystallization is easy to cause. Chinese patent CN106531387A discloses a novel amorphous magnetic powder core and a preparation method thereof, amorphous alloy powder particles are adopted, dehumidification treatment is carried out, then the amorphous alloy powder particles and an insulating coating agent are mixed, a metal strip with the thickness of 15-500 microns is soaked in a sodium silicate or potassium silicate solution, then heat preservation solidification treatment and cooling are carried out at the temperature of 50-200 ℃, then the metal strip is placed in a mould with required shape and size for pressure forming to prepare an amorphous magnetic core primary product, pretreatment is carried out under the protection condition of vacuum or inert gas, the amorphous magnetic core processed product is cooled after high-temperature sintering treatment in a heat treatment device, and finally the amorphous magnetic powder core is prepared by chamfering a coating. The method has the advantages of complex process, high cost and difficult process control, and the amorphous alloy powder is easy to crystallize by heat treatment at a certain temperature to influence the performance of the magnetic core.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of providing the method for manufacturing the powder magnetic core by insulating and curing the amorphous powder at room temperature, the amorphous powder and the photosensitive resin are mixed, and then a thin-layer accumulation layered illumination curing process is adopted, so that the problem of product crystallization easily caused by the conventional thermal processing process can be solved, and the method has the characteristics of simple and convenient process control, energy conservation, convenience, rapidness and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for manufacturing the powder magnetic core by insulating and curing the amorphous powder at room temperature comprises the following raw materials of the amorphous powder and photosensitive resin, and is characterized in that the mass ratio of the amorphous powder to the photosensitive resin is as follows: 75-98% of amorphous powder and 2-25% of photosensitive resin;
the amorphous powder is one or more of cobalt-based amorphous powder, iron-based nanocrystalline powder and iron-nickel strip powder, and the diameter of the amorphous powder is 1 nm-1 mm.
The photosensitive resin consists of resin monomers and a photoinitiator, the viscosity is 150-200mpa.s at 25 ℃, the shrinkage is 1.05-1.25%, the curing wavelength is 355-410nm, the tensile strength is 36-52Mpa, the hardness is 84D, and the elongation at break is 11-20%.
A method for manufacturing a powder magnetic core by insulating and solidifying amorphous powder at room temperature, comprising the following steps:
1) weighing amorphous powder and photosensitive resin according to a certain proportion, placing into a photocuring rapid forming machine, and stirring for 5-10min to obtain a mixture;
2) uniformly and flatly coating the mixture on a photocuring forming vessel, wherein the thickness of the coating is 0.01mm-1 mm;
3) irradiating and curing for 10-15min by adopting an ultraviolet light source;
4) and (3) repeating the steps 2) and 3) until the required powder magnetic core is prepared.
Compared with the prior art, the invention has the beneficial effects that:
1) the light curing of the photosensitive resin amorphous powder composite material is carried out at room temperature and normal pressure, and a cold processing mode is adopted to radically prevent the crystallization phenomenon;
2) the amorphous magnetic core formed by illumination curing can be made into a special-shaped powder magnetic core, the product has excellent performance, and the application field range of the product can be expanded;
3) in the illumination curing process, a fan is adopted to perform forced air cooling, so that the rapid forming of the powder magnetic core is promoted;
4) has the advantages of few operation steps, wide proportioning, wide application range, cold curing and the like;
5) the energy consumption is saved to a great extent, the process control is simple and convenient, the cost is reduced, and the manufacturing efficiency of the product is increased.
Detailed Description
The following examples are given to further illustrate embodiments of the present invention:
[ EXAMPLE I ] FeSiBPCu powder magnetic core
The method comprises the following steps: material preparation
1) Preparation of photosensitive resin: the resin is composed of resin monomers and a photoinitiator, the viscosity is 150-200mpa.s at 25 ℃, the shrinkage is 1.05-1.25%, the curing wavelength is 355-410nm, the tensile strength is 36-52Mpa, the hardness is 84D, and the elongation at break is 11-20%.
2) Preparing amorphous powder: carrying out heat treatment on an amorphous strip with the component of FeSiBPCu in a vacuum heat treatment furnace, then cooling along with the furnace, and carrying out embrittlement treatment; performing ball milling treatment on the treated strip in a ball mill, and screening the prepared powder to obtain amorphous alloy powder with different particle sizes; screening the amorphous alloy powder according to the particle size by using a screen, and then mixing 60-90% of the first powder passing through a-400 mesh screen and 10-40% of the second powder passing through a-270-400 mesh screen to prepare the mixed amorphous alloy powder.
Step two: ingredient stirring
Weighing 90% of amorphous powder and 10% of photosensitive resin according to the mass percentage, putting the amorphous powder and the photosensitive resin photosensitive.
Step three: coating operation
The mixture was uniformly and flatly applied to a photocuring former in a thickness of 1 mm.
Step four: light curing
The ultraviolet light source adopts 360-405nm UV light source of Shenzhen Xingyuan Sheng photoelectricity company LED purple light, the power of the ultraviolet light source is 30W, the illumination wavelength is 355-410nm, and the ultraviolet light source is kept for 10min under illumination.
And repeating the third step and the fourth step until the accumulation of the cured coating reaches 5mm, thus obtaining the required FeSiBPCu powder magnetic core.
[ example II ] FeSiBPCu + FeSiB powder magnetic core
The method comprises the following steps: material preparation
1) Preparation of photosensitive resin: the resin is composed of resin monomers and a photoinitiator, the viscosity is 150-200mpa.s at 25 ℃, the shrinkage is 1.05-1.25%, the curing wavelength is 355-410nm, the tensile strength is 36-52Mpa, the hardness is 84D, and the elongation at break is 11-20%.
2) Preparing amorphous powder: the FeSiBPCu powder and the FeSiB amorphous powder are weighed and mixed into mixed powder according to the ratio of 2:1, wherein the preparation of the FeSiBPCu powder is the same as that of the first embodiment.
Step two: ingredient stirring
Weighing 85% of mixed powder and 15% of photosensitive resin according to the mass percentage, and putting the mixed powder and the photosensitive resin into a photocuring rapid forming machine to be stirred for 10min to obtain a mixture.
Step three: coating operation
The mixture was uniformly and flatly coated on a photocuring molding vessel at a coating thickness of 0.9 mm.
Step four: light curing
The ultraviolet light source adopts an LED violet light 360-405nmUV light source of Shenzhen Xingyuan Sheng photoelectricity Limited, the power of the ultraviolet light source is 30W, the illumination wavelength is 355-410nm, and the ultraviolet light source is kept for 12min under illumination.
And repeating the third step and the fourth step until the accumulation of the cured coating reaches 2cm, thus obtaining the required FeSiBPCu + FeSiB powder magnetic core.
[ EXAMPLE III ] FeSiBCuNb nanocrystalline powder magnetic core
The method comprises the following steps: material preparation
1) Preparation of photosensitive resin: the resin is composed of resin monomers and a photoinitiator, the viscosity is 150-200mpa.s at 25 ℃, the shrinkage is 1.05-1.25%, the curing wavelength is 355-410nm, the tensile strength is 36-52Mpa, the hardness is 84D, and the elongation at break is 11-20%.
2) Preparing amorphous powder: the FeSiBCuNb nanocrystalline powder was weighed and prepared as in example one.
Step two: ingredient stirring
87% of FeSiBCuNb nanocrystalline powder and 13% of photosensitive resin are weighed according to the mass percentage, and the mixture is prepared by stirring the powder and the photosensitive resin in a photocuring rapid forming machine for 9 min.
Step three: coating operation
The mixture was uniformly and flatly coated on a photocuring molding vessel at a coating thickness of 0.8 mm.
Step four: light curing
The ultraviolet light source adopts 360-405nm UV light source of Shenzhen Xingyuan Sheng photoelectricity company LED purple light, the power of the ultraviolet light source is 30W, the illumination wavelength is 355-410nm, and the ultraviolet light source is kept for 11min under illumination.
And repeating the third step and the fourth step until the accumulation of the cured coating reaches 3cm, thus obtaining the required FeSiBCuNb powder magnetic core.
The properties of the powder magnetic cores prepared in the first, second and third examples of the invention are shown in the following table:
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. The method for manufacturing the powder magnetic core by insulating and curing the amorphous powder at room temperature comprises the following raw materials in percentage by mass: 75-98% of amorphous powder and 2-25% of photosensitive resin;
the amorphous powder is one or more of cobalt-based amorphous powder, iron-based nanocrystalline powder and iron-nickel strip powder, and the diameter of the amorphous powder is 1 nm-1 mm.
The photosensitive resin consists of resin monomers and a photoinitiator, the viscosity is 150-200mpa.s at 25 ℃, the shrinkage is 1.05-1.25%, the curing wavelength is 355-410nm, the tensile strength is 36-52Mpa, the hardness is 84D, and the elongation at break is 11-20%.
2. The method for manufacturing the powder magnetic core by insulating and solidifying the amorphous powder at room temperature according to claim 1 is realized, and is characterized by comprising the following steps of:
1) weighing amorphous powder and photosensitive resin according to a certain proportion, placing into a photocuring rapid forming machine, and stirring for 5-10min to obtain a mixture;
2) uniformly and flatly coating the mixture on a photocuring forming vessel, wherein the thickness of the coating is 0.01mm-1 mm;
3) irradiating and curing for 10-15min by adopting an ultraviolet light source;
4) and (3) repeating the steps 2) and 3) until the required powder magnetic core is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039069.7A CN112349506A (en) | 2020-09-28 | 2020-09-28 | Method for manufacturing powder magnetic core by insulating and curing amorphous powder at room temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011039069.7A CN112349506A (en) | 2020-09-28 | 2020-09-28 | Method for manufacturing powder magnetic core by insulating and curing amorphous powder at room temperature |
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| CN112349506A true CN112349506A (en) | 2021-02-09 |
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| CN202011039069.7A Pending CN112349506A (en) | 2020-09-28 | 2020-09-28 | Method for manufacturing powder magnetic core by insulating and curing amorphous powder at room temperature |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456480A (en) * | 2013-08-28 | 2013-12-18 | 黑龙江八一农垦大学 | One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core |
| CN109676125A (en) * | 2019-01-08 | 2019-04-26 | 北京科技大学 | A kind of method that 3D printing prepares Sintered NdFeB magnet |
| CN110415959A (en) * | 2018-04-27 | 2019-11-05 | 通用汽车环球科技运作有限责任公司 | Magnet is manufactured with photosensitive paste near-net-shape |
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2020
- 2020-09-28 CN CN202011039069.7A patent/CN112349506A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456480A (en) * | 2013-08-28 | 2013-12-18 | 黑龙江八一农垦大学 | One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core |
| CN110415959A (en) * | 2018-04-27 | 2019-11-05 | 通用汽车环球科技运作有限责任公司 | Magnet is manufactured with photosensitive paste near-net-shape |
| CN109676125A (en) * | 2019-01-08 | 2019-04-26 | 北京科技大学 | A kind of method that 3D printing prepares Sintered NdFeB magnet |
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Application publication date: 20210209 |