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Powder sinter process for preparing permanent-magnet Al-Ni-Co-Ti alloy

A technology of aluminum-nickel-cobalt-titanium, permanent magnet alloy, applied in the direction of inorganic material magnetism, etc., can solve the problems of low magnetic performance, high product difficulty, poor precision and so on

Inactive Publication Date: 2002-05-01
HANGZHOU PERMANENT MAGNET GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the problems of AlNiCoTi permanent magnet alloy products manufactured by casting process, such as poor precision, high difficulty in making small and complicated products, and poor surface quality, it is difficult to manufacture small, thin, high-precision, and good surface quality products.
The powder sintering process can produce products that meet this requirement, but the magnetic properties are low. If breakthroughs can be made in key processes such as the chemical composition (formula), sintering, and heat treatment of the alloy, it can not only produce its own characteristics, but also produce the same as the casting process. Products with the same magnetic properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] According to the requirements of different magnetic properties, formulas of three chemical compositions are set (see Table 4), and three different sintering (see Table 5) and heat treatment systems (see Table 6) are selected for each formula to obtain nine groups of Br, The magnetic performance data of Hcb and (BH)max (see Table 7) are as follows:

[0032] group

co

Al

Ni

Cu

Ti

Nb

Fe

1-1

37.9％

7.2％

13％

3％

5.7％

0.5％

Remain

1-2

36.4％

6.3％

11％

4％

6.5％

0.8％

Remain

1-3

37％

7.8％

13.8％

2.6％

7.5％

1.2％

Remain

[0033] 2. Sintering

[0034] Three vacuum sintering systems Table 5

[0035] 3. Heat treatment

[0036]

group

solid solution

deal with

At 199KA / m

magnetic field central control

...

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PUM

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Abstract

A permanent-magnet Al-Ni-Co-Ti alloy is prepared from Al (6-8 wt.%), Co (36.1-37.9 wt.%), Cu (2.5-5 wt.%), Nb (0.2-1.5 wt.%), Ni (10-14 wt.%), Ti (5-8 wt.%), and Fe (the banance) through 4-stage sintering, cooling in furnace or in argon gas to 100 deg.c, and heat treatment. Its density can reach 7.3g / cu.cm.

Description

technical field [0001] The invention relates to a production process of a permanent magnet alloy, which is particularly suitable for the production process of a high magnetic performance powder sintered AlNiCoTi permanent magnet alloy. Background technique [0002] Since the powder sintering process produces AlNiCoTi permanent magnet alloy products, the density is lower than that of the AlNiCoTi permanent magnet alloy products produced by the casting process. The densities of the two grades AlNiCo31 / 11 and AlNiCo33 / 15 are both 7.0g / cm 3 , the density of two grades of AlNiCo38 / 11 and AlNiCo36 / 15 cast AlNiCoTi permanent magnet alloy is 7.3g / cm 3 ), so the magnetic properties of the powder sintered AlNiCoTi permanent magnet alloy produced in China cannot reach the magnetic performance index of the cast AlNiCoTi permanent magnet alloy (see Table 1 and Table 2 for details). [0003] GB / T17951-2000 and GB4753-84 standards [0004] Magnetic properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/00C22C1/04C22C38/14H01F1/04
Inventor 俞松法霍福强丰光跃
Owner HANGZHOU PERMANENT MAGNET GRP
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