Production process of powder sintered alnico permanent magnet alloy

A permanent magnet alloy and production process technology, applied in the production process field of powder sintered alnico permanent magnet alloy, to achieve the effects of increasing sintering density, reducing eutectic temperature, and increasing remanence

Active Publication Date: 2021-04-20
杭州科德磁业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent CN01130484.7 Powder sintered AlNiCoTi permanent magnet alloy production process, involving eight types of production processes, its formula Al: 6-8%, Co: 36.1-37.9%, Cu: 2.5-5%, Nb: 0.5- 1.5%, Ni: 10-14%, Ti: 5-8%, the rest is Fe, all are percentages by mass, not involved in the production process of sintered AlNiCo five types
At present, the magnetic properties of sintered AlNiCo five types are AlNiCo34 / 5, its Br is 11200mT, Hcb is 48kA / m, and BHmax is 34kJ / m 3 , compared with cast common five Br1200mT, Hcb 48kA / m, BHmax 37kJ / m 3 Low, the magnetic properties of sintered five types have not been improved for many years. If the formula is adjusted and the process method is improved, it can meet the performance level of casting ordinary five types

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]The production process of powder sintered aluminum nickel cobalt permanent magnet alloy is as follows:

[0031]Step 1, the material is called: It is called CO 24.5-26%, Ni 13.5-14.5%, Cu 2-3%, Al 8-9%, NB 0-0.5%, Ti 0-0.5%, B. 0-0.3%, FE 46.2-52%;

[0032]Step 2, vacuum smelting: Co, Al, gently melt into COAL alloys by vacuum, gelting Ti, Fe through vacuum into a TiFe alloy, then breaking the coal alloy, TiFe alloy, to obtain crushing particles, then use gas flow grinding Brittle powder;

[0033]Step three, the first mixing: Cu, Ni, Nb, B grinding the powder and mixed, resulting in mixed powder, reducing mixed powder at 550 ° C for 2 hours with hydrogen, thereby removing oxidized impurities;

[0034]Step four, mix again: mix the powder in step II to mix the mixture of step three through the V-type or three-dimensional mixing machine to obtain alloy powder;

[0035]Step 5, suppress: press the alloy powder with a dry powder press, the mold can be square, circular, annular, or other shape, to o...

Embodiment 2

[0051]The production process of powder sintered aluminum nickel cobalt permanent magnet alloy is as follows:

[0052]Step 1, material weighing: CO 24.8%, Ni 14%, Cu 2.2%, Al 8.3%, Nb0.3%, Ti 0.1%, B 0.1%, FE 50%;

[0053]Step 2, vacuum smelting: Co, Al, gently melt into COAL alloys by vacuum, gelting Ti, Fe through vacuum into a TiFe alloy, then breaking the coal alloy, TiFe alloy, to obtain crushing particles, then use gas flow grinding Brittle powder;

[0054]Step three, the first mixing: Cu, Ni, Nb, B grinding the powder and mixed, resulting in mixed powder, reducing mixed powder at 550 ° C for 2 hours with hydrogen, thereby removing oxidized impurities;

[0055]Step four, mix again: mix the powder in step II to mix the mixture of step three through the V-type or three-dimensional mixing machine to obtain alloy powder;

[0056]Step 5, suppress: press the alloy powder with a dry powder press, the mold can be square, circular, annular, or other shape, to obtain a compressed product, the pressure ...

Embodiment 3

[0072]The production process of powder sintered aluminum nickel cobalt permanent magnet alloy is as follows:

[0073]Step 1, the material is called: CO 24.5%, Ni 13.5%, Cu 2%, Al 8%, Ti 0-0.5%, B 0.1%, FE 46.2%;

[0074]Step 2, vacuum smelting: Co, Al, gently melt into COAL alloys by vacuum, gelting Ti, Fe through vacuum into a TiFe alloy, then breaking the coal alloy, TiFe alloy, to obtain crushing particles, then use gas flow grinding Brittle powder;

[0075]Step three, the first mixing: Cu, Ni, Nb, B grinding the powder and mixed, resulting in mixed powder, reducing mixed powder at 550 ° C for 2 hours with hydrogen, thereby removing oxidized impurities;

[0076]Step four, mix again: mix the powder in step II to mix the mixture of step three through the V-type or three-dimensional mixing machine to obtain alloy powder;

[0077]Step 5, suppress: press the alloy powder with a dry powder press, the mold can be square, circular, annular, or other shape, to obtain a compressed product, the pressure d...

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Abstract

The invention discloses a production process of powder sintered alnico permanent magnet alloy, which is characterized in that the steps are as follows: step 1, weighing materials: weighing Co 24.5-26%, Ni 13.5-14.5%, Cu 2 by weight percentage ‑3%, Al 8‑9%, Nb 0‑0.5%, Ti 0‑0.5%, B 0‑0.3%, Fe 46.2‑52%; Step 2, vacuum melting; Step 3, initial mixing; Step 4, again Mixing; step five, pressing; step six, sintering: the pressed product is sintered in a vacuum sintering furnace for 8 stages, and then cooled to obtain a sintered product; step seven, heat treatment; step eight, tempering. The present invention improves the magnetic properties, and the magnetic properties Br of the finished product produced by the present invention can reach 1232mT, Hcb can reach 53.4kA / m, and BHmax can reach 37.6kJ / m 3 .

Description

Technical field[0001]The present invention relates to a production process of powder sintered aluminum nickel cobalt permanent magnet alloy.Background technique[0002]Today, today, the Department of Permanent Magnet Materials is a very important functional material. At present, there is a mainstream permanent magnet material with NdFeB, cobalt, ferrite, aluminum nickel cobalt, iron chromium cobalt, etc. Rare Earth Permanent Magnet has been vigorous in recent years, and aluminum nickel cobalt market share has gradually declined, but aluminum nickel cobalt has a place in the field of physical properties in its unique physical properties in terms of high temperature requirements. Aluminum nickel cobalt permanent magnet alloy is divided into manufacturing process into cast aluminum nickel-cobalt and sintered aluminum nickel cobalt, composed of formulation components, and traditional divisions are two, three types, five types, six categories, eight types, nine categories. However, sintere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C22C38/16C22C38/14C22C38/12C22C38/10C22C38/08C22C38/06C22C33/02B22F3/02B22F3/10B22F3/24C21D1/18C21D1/04
CPCB22F3/02B22F3/1007B22F3/1017B22F3/24B22F2003/248B22F2999/00C21D1/04C21D1/18C22C30/02C22C33/0207C22C33/0285C22C38/06C22C38/08C22C38/10C22C38/12C22C38/14C22C38/16C22C2202/02B22F2201/20
Inventor 王占国张保国占礼春姜永涨付勇兵杨全福
Owner 杭州科德磁业有限公司
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