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A kind of preparation method of rare earth permanent magnet for energy-saving motor

A technology of rare earth permanent magnets and permanent magnets, which is applied in the manufacture of inductors/transformers/magnets, motor generators, circuits, etc., to achieve the effects of improving high temperature resistance and coercive force, increasing coercive force, and increasing anisotropy

Inactive Publication Date: 2016-05-25
南通飞来福磁铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After years of research and development, the magnetic energy product of rare earth permanent magnets has been greatly improved, but the coercive force of rare earth permanent magnets still has a lot of room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The permanent magnet of the present embodiment adopts following compound as the permanent magnet material: (Sm 0.88 Ho 0.12 ) 2 (Co 0.73 Fe 0.15 Nb 0.1 Si 0.02 ) 8.5 .

[0018] Mix Sm, Ho, Co, Fe, Nb and Si according to the proportion of the chemical formula, put them in a magnetic levitation melting furnace for melting, the melting is carried out under vacuum, after the melting is completed, pour it into a water-cooled copper mold to obtain an alloy ingot, and then cast The ingot is placed in a vacuum furnace for homogenization treatment, the temperature of the homogenization treatment is 1100-1250°C, and the treatment time is 6-8h; the ingot is placed in a vacuum medium-frequency quick-setting induction furnace, vacuumed, and argon gas is introduced. It is heated and melted, and after the refining is completed, the melt is poured onto a copper roller to prepare a quick-setting sheet.

[0019] Place the above-mentioned quick-setting sheet in a hydrogen breaker ...

Embodiment 2

[0023] The permanent magnet of the present embodiment adopts following compound as the permanent magnet material: (Sm 0.83 Ho 0.17 ) 2 (Co 0.63 Fe 0.19 Nb 0.15 Si 0.03 ) 8.5 .

[0024] Mix Sm, Ho, Co, Fe, Nb and Si according to the proportion of the chemical formula, put them in a magnetic levitation melting furnace for melting, the melting is carried out under vacuum, after the melting is completed, pour it into a water-cooled copper mold to obtain an alloy ingot, and then cast The ingot is placed in a vacuum furnace for homogenization treatment. The homogenization treatment temperature is 1250°C, and the treatment time is 6 hours; the ingot is placed in a vacuum medium-frequency quick-setting induction furnace, vacuumed, and argon gas is introduced to heat and melt. After the refining is completed, the melt is poured onto a copper roller to prepare a quick-setting sheet.

[0025] Place the above-mentioned quick-setting sheet in a hydrogen breaker furnace to evacuate ...

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Abstract

The invention relates to a preparation method for a rare-earth permanent magnet used for an energy-saving motor. The permanent magnet adopts the following compound as a magnetic material: (Sm1-xHox) 2 (Co1-a-b-cFeaNbbSic) 8.5, wherein x = 0.12-0.17, a = 0.15-0.19, b = 0.1-0.15, C = 0.02-0.03. The method includes the following steps: (1) preparing permanent-magnetic alloy-material power; (2) blank making and orientation; (3) sintering. In the rare-earth permanent magnet, Ho is adopted to substitute part of Sm, Fe, Nb and Si are adopted to substitute part of Co so that high-temperature resistance performance and coercivity of the material is improved. In a preparation process, hydrogen demolishing and dehydrogenation are adopted to improve anisotropy of the material. In a blank-making process, a secondary blank-compaction process is adopted to improve magnetic energy product of the magnet. And finally in a sintering process, a secondary tempering process is adopted so that the coercivity of the material is further improved. Therefore, when the rare-earth permanent magnet is used for the energy-saving motor, efficiency and work stability of the energy-saving motor can be improved.

Description

technical field [0001] The invention relates to a preparation method of a rare earth permanent magnet. Background technique [0002] With the acceleration of industrialization, energy issues have become the focus of contemporary society, and research on energy-saving materials has become an important aspect of materials research. As one of the important basic components of various types of machinery, the efficiency of the motor has a major impact on energy conservation and even the sustainable development of the economy. [0003] The permanent magnet energy-saving motor is a DC motor in which the excitation field is established by permanent magnets. In addition to the good mechanical characteristics and adjustment characteristics of general electromagnetic motors, as well as the characteristics of wide speed range and easy control, it also has the advantages of small size, high efficiency and simple structure. Rare earth permanent magnet materials are the core materials of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00H01F41/02B22F3/16
Inventor 周连明周园园程爱军
Owner 南通飞来福磁铁有限公司