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One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core

A preparation process and magnetic powder core technology, which is applied in the field of preparation of soft magnetic nanocrystalline magnetic powder cores, can solve the problems of difficult control of product performance stability, low magnetic performance of nanocrystalline magnetic powder cores, and many steps in the preparation process, and achieve improved magnetic performance , high bonding strength, and the effect of simplifying the production process

Inactive Publication Date: 2013-12-18
HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used preparation process of soft magnetic nanocrystalline magnetic powder core is: spray tape→strip crystallization treatment→crushing→magnetic powder annealing treatment→powder sieving and particle size ratio→passivation treatment→insulation coating→molding→magnetic powder Core stress relief treatment → insulation curing treatment, the above-mentioned process has the following problems: (1) the three-step heat treatment process of strip crystallization treatment, magnetic powder annealing treatment, and stress relief treatment leads to high production energy consumption and reduces production efficiency; (2) ) There are many steps in the preparation process, and the stability of product performance is difficult to control; (3) In order to prevent the growth of nanocrystalline grains, the temperature of the stress relief annealing after the magnetic powder core is pressed is low at about 400 ° C, and the stress relief is not complete. Powder cores have lower magnetic properties

Method used

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  • One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core
  • One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core
  • One-step heat treatment preparation process method for soft nanocrystalline magnetic powder core

Examples

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example 1

[0021] Example 1: Change the composition to Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The fragmented amorphous strips were crushed by ball milling in a high-energy omnidirectional planetary ball mill with a ball-to-material ratio of 1:30, a rotating speed of the large plate at 240 rpm, and a ball milling time of 8 hours. The amorphous metal powder is sieved, and then mixed into a powder consisting of 10% of the first powder passing through -120~+200 mesh, 80% of the second powder passing through -200~+250 mesh and 10% of the third powder passing through -250 mesh particle distribution. Passivate the proportioned amorphous powder for 2 hours, and then dry the powder. Add 3wt% mica powder, 2.5wt% silicone resin, 1wt% zinc stearate, and 15wt% absolute ethanol to the passivated amorphous powder, heat and wet mix and stir to evenly volatilize. Evenly put the insulating coated amorphous powder into the mold, apply pressure to 1700MPa within 3 minutes, hold the pressure for 3 minutes, and ...

example 2

[0022] Example 2: Change the composition to Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The fragmented amorphous strips were crushed by ball milling in a high-energy omnidirectional planetary ball mill with a ball-to-material ratio of 1:30, a rotating speed of the large plate at 240 rpm, and a ball milling time of 8 hours. The amorphous metal powder is sieved and then mixed into a powder consisting of 15% of the first powder passing through -120~+200 mesh, 70% of the second powder passing through -200~+250 mesh and 15% of the third powder passing through -250 mesh particle distribution. Passivate the proportioned amorphous powder for 2 hours, and then dry the powder. Add 3wt% mica powder, 2.5wt% silicone resin, 1wt% zinc stearate, and 15wt% absolute ethanol to the passivated amorphous powder, heat and wet mix and stir to evenly volatilize. Evenly put the insulating coated amorphous powder into the mold, apply pressure to 1700MPa within 3 minutes, hold the pressure for 3 minutes, and o...

example 3

[0023] Example 3: Change the composition to Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The fragmented amorphous strips were crushed by ball milling in a high-energy omnidirectional planetary ball mill with a ball-to-material ratio of 1:30, a rotating speed of the large plate at 240 rpm, and a ball milling time of 8 hours. The amorphous metal powder is sieved, and then mixed into a powder consisting of 20% of the first powder passing through -120~+200 mesh, 60% of the second powder passing through -200~+250 mesh and 20% of the third powder passing through -250 mesh particle distribution. Passivate the proportioned amorphous powder for 2 hours, and then dry the powder. Add 3wt% mica powder, 2.5wt% silicone resin, 1wt% zinc stearate, and 15wt% absolute ethanol to the passivated amorphous powder, heat and wet mix and stir to evenly volatilize. Evenly put the insulating coated amorphous powder into the mold, apply pressure to 1700MPa within 3 minutes, hold the pressure for 3 minutes, and ...

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Abstract

The invention relates to an one-step heat treatment preparation process method for a soft nanocrystalline magnetic powder core and belongs to a nanocrystalline magnetic powder core preparation technology. Amorphous ribbon fragments of which the component is Fe73.5Cu1Nb3Si13.5B9 are directly placed into a high-energy omnibearing planetary ball mill to carry out ball milling crushing without being subjected to heat treatment; the crushed amorphous ribbon fragments are sieved into amorphous powder with different particle sizes and the amorphous powder is mixed; the mixed amorphous powder is passivated and dried in phosphoric acid solution; the passivated amorphous powder is uniformly mixed with an insulating binding agent in a wet mode; the mixture is subjected to heating volatilization and insulating coating; the amorphous powder subjected to insulating coating is placed into a die to be subjected to pressing forming; and after a formed magnetic powder core is subjected to heat treatment under the protection of inert gas, the magnetic powder core is impregnated in insulating glue. The one-step heat treatment preparation process method has high magnetic conductivity, low loss and high stability; meanwhile, preparation process steps are reduced; and production energy consumption of the nanocrystalline magnetic powder core is reduced.

Description

technical field [0001] The invention belongs to a preparation method of a soft magnetic nanocrystalline magnetic powder core, and mainly relates to a one-step heat treatment preparation process for a soft magnetic nanocrystalline magnetic powder core. Background technique [0002] At present, the commonly used soft magnetic nanocrystalline magnetic powder core preparation process is: spray tape → strip crystallization treatment → crushing → magnetic powder annealing treatment → powder screening and particle size ratio → passivation treatment → insulation coating → molding → magnetic powder Core stress relief treatment → insulation curing treatment, the above-mentioned process has the following problems: (1) the three-step heat treatment process of strip crystallization treatment, magnetic powder annealing treatment, and stress relief treatment leads to high production energy consumption and reduces production efficiency; (2) ) There are many steps in the preparation process,...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/147H01F1/26B22F1/00B22F1/02
Inventor 李庆达韩霞胡军张伟
Owner HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
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