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Preparing method of metal magnetic powder core

A magnetic powder core and metal technology, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of large high-frequency eddy current loss and single shape, improve magnetic performance, improve processing performance, and solve the problem of limited use Effect

Inactive Publication Date: 2014-09-10
ZHEJIANG MINGHE STEEL PIPE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for preparing a high-performance metal magnetic powder core, which solves the defects of the existing alloy soft magnetic materials such as large high-frequency eddy current loss and single shape.

Method used

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  • Preparing method of metal magnetic powder core
  • Preparing method of metal magnetic powder core
  • Preparing method of metal magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put the flat powder (containing 4% Si, 15% Al, 5% Ni, and Fe as the balance) prepared by the wet grinding process into a heat treatment furnace, and perform annealing treatment under a nitrogen protective atmosphere at an annealing temperature of 800°C. After 1 h of heat preservation, it was cooled with the furnace. The annealed alloy powder is proportioned according to the following proportions: -100 mesh to +200 mesh particles account for 30% of the total; -200 mesh to +300 mesh particles account for 50% of the total; -300 mesh to +400 mesh Purpose particles accounted for 15% of the total, and the remaining -400 mesh particles accounted for 5% of the total. Add phosphoric acid accounting for 0.5% of the mass of the alloy powder to the prepared powder for passivation treatment, stir evenly and then heat and dry. Then the dried powder is divided into 5 parts on average, numbered 1~5, and the water glass deionized aqueous solution accounting for 0.4%, 0.8%, 1.2%, 1.6% a...

Embodiment 2

[0033] Put the flat powder (containing 6% Si, 13% Al, 3% Ni, 5% Co, and the balance is Fe) prepared by the dry grinding process into a heat treatment furnace, and perform annealing treatment under a nitrogen protective atmosphere. The annealing temperature at 500°C, keep warm for 5 h and then cool down with the furnace. The annealed alloy powder is proportioned according to the following proportions: -100 mesh to +200 mesh particles account for 20% of the total; -200 mesh to +300 mesh particles account for 55% of the total; -300 mesh to +400 mesh Purpose particles accounted for 10% of the total, and the remaining -400 mesh particles accounted for 15% of the total. Add chromic acid accounting for 0.2% of the mass of the alloy powder to the prepared powder for passivation treatment, stir evenly and then heat and dry. Then the dried powder is divided into 5 parts on average, numbered 1~5, and the water glass deionized aqueous solution accounting for 0.4%, 0.8%, 1.2%, 1.6% and 2....

Embodiment 3

[0038] Put the flat powder (containing 9% Si, 12% Al, 2% Ni, 2% Co, 4% Cr, and the balance is Fe) prepared by the wet grinding process into a heat treatment furnace for annealing under a nitrogen protective atmosphere treatment, the annealing temperature was 500 °C, and the furnace was cooled after holding for 5 h. The alloy powder after annealing is proportioned according to the following proportions: -100 mesh to +200 mesh particles account for 25% of the total; -200 mesh to +300 mesh particles account for 40% of the total; -300 mesh to +400 mesh Purpose particles account for 25% of the total, and the rest are -400 mesh particles, accounting for 10% of the total. Add hydrogen peroxide accounting for 1.8% of the alloy powder mass to the prepared powder for passivation treatment, stir evenly and then heat and dry. Divide the dried powder into 5 parts on average, number 1~5, add respectively 0.4%, 0.8%, 1.2%, 1.6% and 2.0% silicone resin acetone solution and 0.5% alloy powder ...

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Abstract

The invention discloses a preparing method of a metal magnetic powder core. The preparing method includes the following steps that (1) master alloy is melt through a vacuum induction furnace, and an alloy thin belt is obtained through a quick quenching device; (2) ball milling is conducted on the thin belt; (3) annealing is conducted on powder; (4) particle size distribution is conducted on the annealed powder; (5) passivant is added into the distributed powder to conduct passivating on the powder, and then a binding agent and an insulating agent are added into the powder to conduct insulating bonding and wrapping on the powder; (6) a lubricating release agent is then added, the mixture is mixed, and compression moulding is conducted; (7) annealing is conducted on a sample obtained through compression moulding, and the sample is cooled along with the furnace, and spraying and coating are conducted to obtain the target product. According to the preparing method, the master alloy contains an appropriate number of alloy elements, so that the alloy processing performance is improved; the alloy powder and an insulating medium are mixed and pressed to be the magnetic powder core, so that eddy-current loss under a high frequency can be greatly reduced; meanwhile, the problem that alloy materials are limited in use due to single shapes is solved through shape diversity of the magnetic powder core.

Description

technical field [0001] The invention relates to the technical field of manufacturing magnetic materials, in particular to a method for preparing a metal magnetic powder core. Background technique [0002] Soft magnetic materials are the most widely used and most diverse type of magnetic materials. There are many kinds of soft magnetic materials, which can be roughly divided into metal soft magnetic materials and ferrite soft magnetic materials. Among them, metal soft magnetic materials can be divided into electrical pure iron, silicon steel, permalloy, super permalloy, iron aluminum alloy, iron silicon aluminum alloy, amorphous nanocrystalline alloy and metal magnetic powder core. [0003] Metal magnetic powder core is a kind of soft magnetic material prepared by metal soft magnetic powder through powder metallurgy process. With the rapid development of information technology and electromechanical industry, magnetic devices are required to develop in the direction of high ...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/22B22D11/06B22F1/02B22F3/02B22F9/04C22C38/06C22C38/08C22C38/10C22C38/14C22C38/16C22C38/34C22C38/38C22C38/52C22C38/58
Inventor 吴琛徐伟严密郑元红周大海傅国柱王新华罗伟
Owner ZHEJIANG MINGHE STEEL PIPE CO LTD
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