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A soft magnetic material for powder injection molding and its preparation process

A technology of powder injection molding and soft magnetic materials, applied in the direction of magnetic materials, magnetic objects, metal processing equipment, etc., can solve the problems of raw material processing, utilization rate and quality control, wasteful manufacturing and material costs, etc., to reduce Effect of magnetocrystalline anisotropy constant, reduction of magnetic loss, and reduction of eddy current loss

Active Publication Date: 2019-09-27
CHANGZHOU GIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, with the rapid development of science and technology, fields such as automobiles, radar, television broadcasting, integrated circuits, computers, and automatic control have put forward higher requirements for iron-based soft magnetic materials. Part design requirements, and it is difficult to have both raw material processing, utilization and quality control, so a lot of manufacturing and material costs are wasted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the present invention, the components of the soft magnetic material are 83.8% by weight of alloy powder, 10.6% of polyoxymethylene copolymer, 3.0% of ethylene / acrylate copolymer, 2.0% of 1-butene / propylene copolymer, 0.5% of lubricant, anti Oxidizing agent 0.1%;

[0026] The alloy powder is composed of Fe, Si and C; the weight ratio of each component in the alloy powder is: Si: 3%, C: 0.01%, and the rest is Fe.

[0027] Above-mentioned lubricant is lithium stearate (C18H35LiO2).

[0028] Above-mentioned antioxidant is B225 antioxidant.

[0029] The preparation process of the soft magnetic material for powder injection molding in the present invention comprises the following steps:

[0030] A. Add alloy powder, polyoxymethylene copolymer, ethylene / acrylate copolymer, 1-butene / propylene copolymer, lubricant and antioxidant into the mixer in proportion, and knead at 190°C for 2-3 Hours, the melt index is 400-750g / 10min, and finally the feed is formed;

[0031] B. Pr...

Embodiment 2

[0043] In the present invention, the components of the soft magnetic material are 87.5% by weight of alloy powder, 9.2% of polyoxymethylene copolymer, 1% of ethylene / acrylate copolymer, 2.0% of 1-butene / propylene copolymer, 0.2% of lubricant, anti Oxidizing agent 0.1%;

[0044] The alloy powder is composed of Fe, Si and C; the weight ratio of each component in the alloy powder is: Si: 3%, C: 0.01%, and the rest is Fe.

[0045] Above-mentioned lubricant is lithium stearate (C18H35LiO2).

[0046] Above-mentioned antioxidant is B225 antioxidant.

[0047] The preparation process of the soft magnetic material for powder injection molding in the present invention comprises the following steps:

[0048] A. Add alloy powder, polyoxymethylene copolymer, ethylene / acrylate copolymer, 1-butene / propylene copolymer, lubricant and antioxidant into the mixer in proportion, and knead at 190°C for 2 hours, Its melt index is 750g / 10min, and finally forms feeding;

[0049] B. Prepare the mixe...

Embodiment 3

[0057] In the present invention, the components of the soft magnetic material are 84.89% by weight of alloy powder, 10.6% of polyoxymethylene copolymer, 2.0% of ethylene / acrylate copolymer, 2.0% of 1-butene / propylene copolymer, 0.5% of lubricant, anti Oxidizing agent 0.01%;

[0058] The alloy powder is composed of Fe, Si and C; the weight ratio of each component in the alloy powder is: Si: 3%, C: 0.01%, and the rest is Fe.

[0059]Above-mentioned lubricant is lithium stearate (C18H35LiO2).

[0060] Above-mentioned antioxidant is B225 antioxidant.

[0061] The preparation process of the soft magnetic material for powder injection molding in the present invention comprises the following steps:

[0062] A. Add alloy powder, polyoxymethylene copolymer, ethylene / acrylate copolymer, 1-butene / propylene copolymer, lubricant and antioxidant into the mixer in proportion, and knead at 190°C for 3 hours, Its melt index is 400g / 10min, and finally forms feeding;

[0063] B. Prepare the ...

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Abstract

The invention relates to a soft magnetic material for powder injection molding and a preparation process thereof. The components of the soft magnetic material are alloy powder 82.5%-87.5%, polyoxymethylene copolymer 9.2%-10.6%, ethylene / acrylate Copolymer 1.0%-3.0%, 1-butene / propylene copolymer 1.0%-2.0%, lubricant 0.1%-0.5%, antioxidant 0.01%-0.1%; the alloy powder is composed of Fe, Si and C; The weight ratio of each component in the alloy powder is: Si: 2.9%-3.1%, C≤0.01%, and the rest is Fe. The invention satisfies the current advanced technology industry's requirements for high precision, high complex structure, high efficiency and large-scale production of iron-based soft magnetic parts, and expands the application of iron-based soft magnetic parts in the technical field of metal powder near-net molding.

Description

technical field [0001] The invention relates to a material for metal injection molding, in particular to a soft magnetic material for powder injection molding and a preparation process thereof. Background technique [0002] Since the 19th century, with the rise of electric power and communication technology, iron-based soft magnetic materials mainly composed of low-carbon steel have been widely used in the magnetic cores of inductance coils such as motors, transformers, and telephone lines. After entering the 20th century, the development of silicon steel sheets successfully replaced low-carbon steel. Because of its low cost and excellent magnetic properties such as low coercive force, it improves the efficiency of transformers and reduces energy loss. It has gradually become a soft magnetic material for the power industry. The preferred material among materials. Nowadays, with the rapid development of science and technology, fields such as automobiles, radar, television br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/22H01F1/147C22C38/02B22F3/10
CPCH01F1/14766C22C38/02B22F3/1007B22F3/1025B22F3/225B22F2999/00B22F2998/10B22F1/10B22F2201/013
Inventor 薛永超邬均文
Owner CHANGZHOU GIAN TECH
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