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A kind of permanent magnet and its manufacturing method

A permanent magnet, weight percentage technology, applied in the field of permanent magnets and their production, can solve problems such as restricting the development of the aerospace industry, and achieve the effects of high remanence and low coercivity

Active Publication Date: 2016-03-23
杭州科德磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the highest level of remanence in traditional magnetic materials is about 1300-1350mT, and the lowest level of coercive force is about 16-20kA / m, which cannot fully meet the requirements of high-precision electronic control systems such as aviation relays, and restricts the development of the aerospace industry. develop

Method used

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  • A kind of permanent magnet and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Fully mix the raw materials according to the ratio of 1# in the table to form a premelt;

[0025] 2) Through vacuum melting and casting, the prepared premelt is melted and cast into ingots;

[0026] 3) Forging and rolling the ingot to make profiles; for the forged profiles, the internal grains are preferentially oriented along the direction of length extension;

[0027] 4) The drawn profile is twice the length of the original profile; the drawn and extruded profile has a preferred orientation of the internal grains along the length direction;

[0028] 5) Carry out heat treatment on the drawn profile, the heat treatment includes the following steps:

[0029] 51) Keep warm at 570°C for 70 minutes;

[0030] 52) Keep warm at 550°C for 130 minutes;

[0031] 53) Keep warm at 510°C for 130 minutes;

[0032] 54) Keep warm at 490°C for 70 minutes.

[0033] A permanent magnet was obtained, the remanence Br was 1400mT, and the coercive force Hc was 2.6kA / m.

Embodiment 2

[0035] 1) Fully mix the raw materials according to the ratio of 2# in the table to form a premelt;

[0036] 2) Through vacuum melting and casting, the prepared premelt is melted and cast into ingots;

[0037] 3) Forging and rolling the ingot to make profiles;

[0038] 3) Forging and rolling the ingot to make profiles; for the forged profiles, the internal grains are preferentially oriented along the direction of length extension;

[0039] 4) Draw the profile to 4 times the length of the original profile; after drawing and extruding the profile, the internal grains are preferentially oriented along the length direction;

[0040] 5) Carry out heat treatment on the drawn profile, the heat treatment includes the following steps:

[0041] 51) Keep warm at 590°C for 50 minutes;

[0042] 52) Insulate at 570°C for 110 minutes;

[0043] 53) Keep warm at 530°C for 110 minutes;

[0044] 54) Keep warm at 510°C for 50 minutes.

[0045] A permanent magnet was obtained, the remanence B...

Embodiment 3

[0047] 1) Fully mix the raw materials according to the ratio of 3# in the table to form a premelt;

[0048] 2) Through vacuum melting and casting, the prepared premelt is melted and cast into ingots;

[0049] 3) Forging and rolling the ingot to make profiles; for the forged profiles, the internal grains are preferentially oriented along the direction of length extension;

[0050] 4) Draw the profile to 3 times the length of the original profile; after drawing and extruding the profile, the internal grains are preferentially oriented along the length direction;

[0051] 5) Carry out heat treatment on the drawn profile, the heat treatment includes the following steps:

[0052] 51) Keep warm at 580°C for 60 minutes;

[0053] 52) Keep warm at 560°C for 120 minutes;

[0054] 53) Keep warm at 520°C for 120 minutes;

[0055] 54) Keep warm at 500°C for 60 minutes.

[0056] A permanent magnet was obtained, the remanence Br was 1450mT, and the coercive force Hc was 2.9kA / m.

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Abstract

The invention discloses a permanent magnet comprising the following components in percentage by weight: 8-12.5% of nickel, 55.5-60.5% of cobalt, 1.6-2.4% of aluminum, 0.6-1.3% of titanium and 26-32% of iron. The invention also discloses a manufacturing method of the permanent magnet. The manufacturing method comprises the steps of fully mixing the raw materials in proportion to form a pre-melting material; performing vacuum melting and casting to melt the pre-melting material and cast the pre-melting material into an ingot; forging and rolling the ingot to prepare a section material; drawing the section material to ensure that the section material is greatly deformed; performing texture orientation; performing heat treatment. The permanent magnet has the residual magnetism Br of 1400-1500mT and the coercive force Hc of 2.0-3.2kA / m, has higher residual magnetism and lower coercive force compared with the conventional magnetic material, can be applied to high-precision relays, has the characteristics of rapid magnetization and demagnetization, and can meet requirements for the development of aerospace products.

Description

technical field [0001] The invention relates to the field of permanent magnet manufacturing, in particular to a permanent magnet and a manufacturing method thereof. Background technique [0002] Due to the high frequency of operation of some relays, the magnetic material in the relay needs to have the characteristics of rapid magnetization and demagnetization, that is, the magnetic material is required to have high remanence and low coercive force. At present, the highest level of remanence in traditional magnetic materials is about 1300-1350mT, and the lowest level of coercive force is about 16-20kA / m, which cannot fully meet the requirements of high-precision electronic control systems such as aviation relays, and restricts the development of the aerospace industry. develop. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide a permanent magnet with high remanence and low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07H01F1/047
Inventor 张保国
Owner 杭州科德磁业有限公司
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