Method for manufacturing of insulated soft magnetic metal powder formed body

A metal powder and soft magnetic technology, applied in the field of manufacturing high-performance insulating soft magnetic metal powder moldings, can solve problems such as damage to insulating films, and achieve the effect of low iron loss

Inactive Publication Date: 2008-07-02
MITSUBISHI STEEL MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at the time of the second high-temperature heat treatment, there is a possibility that the difference in thermal expansion coefficient between the magnetic powder and the oxide insulating film may destroy the insulating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Adding 0.017% by mass of phosphoric acid solution relative to the mass of the raw material powder to permalloy PB-based raw material powder having a particle size distribution of 10 to 150 μm, and then drying the mixture at room temperature forms an iron phosphate film of 1 pm or less. 2.4% by mass of alumina powder relative to the mass of the raw material powder was mixed therewith. To the obtained insulating soft magnetic metal powder, 0.5% by mass of zinc stearate was added as a lubricant, and mixed. Put the powder into the mold at room temperature, and at 15t / cm 2 Pressed under surface pressure to obtain a ring-shaped "pressed article".

[0050] The "pressed article" was subjected to a first heat treatment at 950°C in a non-oxidizing atmosphere for 60 minutes, and then a second heat treatment at 500°C in an oxidizing atmosphere for 60 minutes.

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PUM

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Abstract

A method of manufacturing an insulating soft magnetic metal powder compact, by forming an inorganic insulating film on the surface of soft magnetic metal powder particles, compacting and molding the powder, and then performing heat treatment to provide an insulating soft magnetic metal powder compact, The method includes: compacting and forming the powder; then, at a high temperature higher than the Curie temperature of the soft magnetic metal powder and lower than the critical temperature for destroying the insulating film, in a non-oxidizing atmosphere such as vacuum, inert gas, etc., making the powder The powder is magnetically annealed; then further heat-treated in an oxidizing atmosphere such as air at a temperature of 400°C to 700°C.

Description

technical field [0001] The present invention relates to a method for manufacturing a high-performance insulating soft magnetic metal powder molded body, which is very suitable for use in motor cores and ring cores, etc. as electrical / electronic components, and to a method for manufacturing an insulating soft magnetic metal powder molded body method, which has low iron loss and high magnetic permeability. Background technique [0002] In recent years, with the improvement of the performance of electrical / electronic components (higher efficiency and compact size), and the increase in the use of insulating soft magnetic metal powder molded bodies for motor cores, ring cores, etc., it has been required to reduce iron loss and increase magnetic permeability. Rate. In order to enhance the magnetic permeability, it is required to reduce the thickness of the insulating layer so as to narrow the spaces between the particles of the soft magnetic metal powder. Iron loss usually consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10B22F1/02H01F1/153B22F1/16
CPCB22F2003/248B22F2998/10B22F2999/00H01F1/33H01F41/0246B22F1/16B22F3/24B22F2201/03B22F3/02B22F3/15B22F3/04
Inventor 宇之木贤一永井宪一山崎昭一曾田裕二
Owner MITSUBISHI STEEL MFG CO LTD
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