Preparation method of iron-nickel-molybdenum metal magnetic powder core with magnetic permeability mu = 400

A technology of iron-nickel-molybdenum and magnetic permeability, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of brittle magnetic core performance, low molding pressure, high pressure, etc., and achieve low molding pressure , reduce the molding pressure, increase the effect of temperature

Active Publication Date: 2018-01-12
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems of high pressure, fragile magnetic core and low magnetic permeability in the traditional preparation method of iron-nickel-molybdenum magnetic powder core, the present invention pr

Method used

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  • Preparation method of iron-nickel-molybdenum metal magnetic powder core with magnetic permeability mu = 400

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Embodiment 1

[0036] A preparation method of an iron-nickel-molybdenum metal magnetic powder core with a magnetic permeability μ=400, comprising the following steps:

[0037] (1) weighing: according to 80% nickel ingot, 2.8% ferromolybdenum (molybdenum content 55%, surplus is iron), surplus is the mass percentage content proportioning of iron and takes each component, for subsequent use;

[0038] (2) Gas atomization pulverization: each component is melted in an intermediate frequency induction furnace, and atomized pulverization is carried out by nitrogen at a pressure of 1.2 MPa through the tundish of the atomization equipment;

[0039] (3) Particle size combination: After sieving the magnetic powder obtained in step (2) according to the particle size, the particle size combination is carried out according to different particle size ratios. Based on the total mass of the magnetic powder matrix, the magnetic powder particle size combination is: -140~+200 mesh magnetic powder 5%, -200~+300 m...

Embodiment 2

[0047] A preparation method of an iron-nickel-molybdenum metal magnetic powder core with a magnetic permeability μ=400, comprising the following steps:

[0048] (1) weighing: according to 82% nickel ingot, 3.2% ferromolybdenum (molybdenum content 65%, surplus is iron), surplus is the mass percentage content ratio of iron and takes each component, for subsequent use;

[0049] (2) Gas atomization pulverization: each component is melted in an intermediate frequency induction furnace, and atomized pulverization is carried out by nitrogen at a pressure of 3.2 MPa through the tundish of the atomization equipment;

[0050] (3) Particle size combination: After sieving the magnetic powder obtained in step (2) according to the particle size, the particle size combination is carried out according to different particle size ratios. Based on the total mass of the magnetic powder matrix, the magnetic powder particle size combination is: -140~+200 mesh magnetic powder 15%, -200~+300 mesh mag...

Embodiment 3

[0059] A preparation method of an iron-nickel-molybdenum metal magnetic powder core with a magnetic permeability of 400, comprising the following steps:

[0060] (1) Weighing: according to 81% nickel ingot, 3.0% ferromolybdenum (molybdenum content 60%, surplus is iron), surplus is the mass percentage content proportioning of iron and takes each component, for subsequent use;

[0061] (2) Gas atomization pulverization: each component is melted in an intermediate frequency induction furnace, and atomized pulverization is carried out by nitrogen at a pressure of 2.4 MPa through the tundish of the atomization equipment;

[0062] (3) Particle size combination: After sieving the magnetic powder obtained in step (2) according to the particle size, the particle size combination is carried out according to different particle size ratios. Based on the total mass of the magnetic powder matrix, the magnetic powder particle size combination is: -140~+200 mesh magnetic powder 10%, -200~+300...

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Abstract

The invention relates to the technical field of metal soft magnetic material manufacture, in particular to a preparation method of an iron-nickel-molybdenum metal magnetic powder core with the magnetic permeability mu = 400. The preparation method comprises the steps of 1, weighing material; 2, gas atomization pulverizing; 3, granularity combination; 4, heat treatment; 5, activation treatment; 6,once insulating coating; 7, twice insulating coating; 8, compression molding; 9, core annealing; 10, immersion spraying. According to the preparation method of the iron-nickel-molybdenum metal magnetic powder core, before the insulating coating, the surface of the magnetic powder is activated by using an activator, the coating effect is increased, the formed coating layer is more uniform, and theprepared core is not easy to break; organic reagent is not used, and the preparation process is greener and more environmentally friendly; a high temperature release agent is adopted, the heat treatment temperature is high, the forming pressure is low, the magnetic permeability of the magnetic core is improved; the whole method is simple in process, easy to implement and strong in operability.

Description

technical field [0001] The invention relates to the technical field of metal soft magnetic material manufacturing, in particular to a method for preparing an iron-nickel-molybdenum metal magnetic powder core with a magnetic permeability μ=400, which has good cladding effect, low molding pressure, and is conducive to improving the magnetic permeability of the magnetic core. Background technique [0002] Metal magnetic powder core is an important kind of soft magnetic material. Because of its unique properties, it plays an important role in the electronics industry, and its application range and usage are increasing rapidly. Iron-nickel-molybdenum metal magnetic powder core has its unique properties: the lowest loss, the highest magnetic permeability and the best temperature coefficient, and is widely used in precision instruments and military equipment. With the rapid development of today's electronic technology, terminal products are constantly developing in the direction of...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/26B22F1/02C21D1/26C22C38/12C22C38/16C22C38/02C22C38/32
Inventor 吕世雅
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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