Integrated one-time forming method of amorphous and nano-crystal magnetic powder cores

An integral molding, nanocrystalline technology, applied in the direction of magnetic core/yoke, inductor/transformer/magnet manufacturing, electrical components, etc., to achieve the effect of convenient use, simple mold structure, and simple process

Inactive Publication Date: 2014-04-16
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no unified standard for amorphous and nanocrystalline magnetic powder cores. Different preparation methods can produce magnetic powder cores with different properties, and the performance of magnetic powder cores produced by the same preparation method is also different. Their application should be based on actual Choose the appropriate specifications and magnetic properties of magnetic powder cores to achieve the maximum utilization of magnetic properties

Method used

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  • Integrated one-time forming method of amorphous and nano-crystal magnetic powder cores
  • Integrated one-time forming method of amorphous and nano-crystal magnetic powder cores
  • Integrated one-time forming method of amorphous and nano-crystal magnetic powder cores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Sieve the prepared cobalt-based amorphous magnetic powder to obtain magnetic powder with different particle sizes, add 3% oleic acid and stir evenly, and pack it after drying; fully mix the amorphous magnetic powder with binder (organic binder, inorganic binder) After mixing, weigh and pour it into the rod-shaped component mold (the inner wall of the mold is coated with a release agent such as lubricating oil in advance), and press it into a cobalt-based amorphous powder magnetic core with a specific specification and shape under a pressure of 9MPa with a rod-shaped component mold, heat treatment Eliminate stress, paint the surface or cover with plastic casing, etc., then perform performance testing and package the finished product;

[0015] Among them, the rod-shaped component mold includes a press tool 1, a set mold 2, a base 3 and a fastener 4. The set mold 2 is a columnar structure with a circular cavity. The upper end of the set mold 2 is connected with the press to...

Embodiment 2

[0017] Sieve the prepared iron-based amorphous and nanocrystalline magnetic powders to obtain magnetic powders of different particle sizes, add 2% oleic acid and stir evenly for later use, and pack after drying; mix amorphous and nanocrystalline magnetic powders with binders (organic binders, Inorganic binder) is fully mixed, weighed and poured into the ring-shaped component mold (the inner wall of the mold is coated with a release agent such as lubricating oil in advance), and pressed into a non-standard shape with a ring-shaped component mold under a pressure of 15MPa. Crystalline and nanocrystalline powder magnetic cores, heat treatment to eliminate stress, the surface is painted or covered with plastic shells and other packaging treatments, and then performance testing is carried out, and the finished product is packaged;

[0018] Among them, the ring-shaped element mold includes a press tool 1, a sleeve mold 2, a base 3 and a central shaft 5, the lower part of the press to...

Embodiment 3

[0020] Sieve the prepared iron-nickel-based amorphous alloy magnetic powder to obtain magnetic powder of different particle sizes, add 4.5% oleic acid and stir evenly, and pack it after drying; the amorphous magnetic powder and binder (organic binder, inorganic binder ) After fully mixed, weigh and pour into the E-shaped component mold (the inner wall of the mold is coated with a release agent such as lubricating oil in advance), and press the E-shaped component mold under a pressure of 18MPa to form a specific specification E-shaped cobalt-based amorphous powder magnet. Core, heat treatment to relieve stress, the surface is painted or covered with plastic casing and other packaging treatment, then performance testing, finished product packaging;

[0021] Among them, the E-shaped component mold includes a press tool 1, a cover mold 2, a base 3 and a fastener 4. There is an E-shaped communicating cavity in the cover mold 2. The lower part of the press tool 1 and the upper part o...

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Abstract

An integrated one-time forming method of amorphous and nano-crystal magnetic powder cores is characterized in that the method comprises the following steps that (1) prepared amorphous and nano-crystal magnetic powder is screened to obtain magnetic powder of different granularities, oleic acid accounting for 1-5% of the total mass is added in the magnetic powder, the mixture of the magnetic powder and the oleic acid is evenly stirred, and the mixture is reserved for use after being dried and packaged; (2) the amorphous and nano-crystal magnetic powder and binders are completely mixed and then are pressed into the amorphous and nano-crystal magnetic powder cores through molds under the pressure of 1-20 MPa, then heat processing is carried out to eliminate stress, performance detection is carried out after packaging processing, and finished products are packaged; the molds comprise bar-shaped element molds, annular type element molds and E-shaped element molds, and the like. The integrated one-time forming method has the advantages that the technology is simple, one-time integrated forming and demolding are easy, the molds are simple in structure and convenient to use, and magnetic performance of the magnetic powder cores produced in a large scale is stable.

Description

technical field [0001] The invention relates to a one-time integral molding method of amorphous and nanocrystalline magnetic powder cores. Background technique [0002] According to the technical principle of its preparation, magnetic powder can be roughly divided into three categories: physical method, chemical method and mechanical alloying. With the rapid development of science and technology, amorphous and nanocrystalline materials are increasingly showing their importance as a new generation of functional materials. It is mainly used in aircraft flight control system, remote sensing and telemetry technology, gyroscope, compass, platform, motor power control, etc. The magnetic permeability of general magnetic materials always changes with the magnetic field and temperature. However, after the magnetic powder core is made, the magnetic permeability can maintain a constant value in a wide range of magnetic fields and temperatures, which is a very prominent advantage of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F3/08H01F27/255B22F3/03
Inventor 李长全于润桥付鑫李文薛名山王法军欧军飞
Owner NANCHANG HANGKONG UNIVERSITY
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