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Method for manufacturing Sm-Fe-N magnet, Sm-Fe-N magnet, and motor having Sm-Fe-N magnet

A manufacturing method, sm-fe-n technology, applied in the manufacture of Sm-Fe-N magnets, Sm-Fe-N magnets and motors with Sm-Fe-N magnets, can solve problems such as manufacturing block magnets

Active Publication Date: 2021-05-11
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for Sm-Fe-N magnets, it is difficult to manufacture bulk magnets by sintering process at high temperature

Method used

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  • Method for manufacturing Sm-Fe-N magnet, Sm-Fe-N magnet, and motor having Sm-Fe-N magnet
  • Method for manufacturing Sm-Fe-N magnet, Sm-Fe-N magnet, and motor having Sm-Fe-N magnet
  • Method for manufacturing Sm-Fe-N magnet, Sm-Fe-N magnet, and motor having Sm-Fe-N magnet

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0040] Hereinafter, the first embodiment of the present disclosure will be described in detail using the drawings. figure 1 It is a flow chart showing the structure of the manufacturing method of a Sm-Fe-N magnet. The manufacturing method of the Sm-Fe-N magnet includes a sealing step (S10), a magnetic field application step (S12), a pre-rolling step (S14), and a pressing step (S16).

[0041] The sealing step ( S10 ) is a step of filling and sealing a metal sheath with magnet powder mainly composed of a Sm—Fe—N compound.

[0042] The magnet powder is composed of Sm-Fe-N compound as the main component. The Sm—Fe—N compound is a compound containing Sm, Fe, and N. Sm-Fe-N compounds such as Sm can be used 2 Fe 17 N x . SM 2 Fe 17 N x It is a nitride magnet material with excellent magnetic properties. SM 2 Fe 17 N x The amount of nitrogen x in nitrogen may be, for example, 02 Fe 17 N x Can also be Sm 2 Fe 17 N 3 (The amount of nitrogen x is 3).

[0043] The Sm—Fe—...

no. 2 approach

[0090] Next, a second embodiment of the present disclosure will be described in detail using the drawings. The second embodiment differs from the first embodiment mainly in that it does not include the pre-rolling step ( S14 ). Figure 10 It is a flow chart showing the structure of the manufacturing method of a Sm-Fe-N magnet. The manufacturing method of the Sm-Fe-N magnet includes a sealing step (S20), a magnetic field applying step (S22), and a pressurizing step (S24). In addition, the same code|symbol is attached|subjected to the same structure, and detailed description is abbreviate|omitted.

[0091] The sealing step (S20) is to fill the metal sheath 10 with the magnet powder 12 mainly composed of Sm-Fe-N compound, and seal the magnet powder 12 filled in the metal sheath 10 by vibrating and compacting. process. The sealing step ( S20 ) can be performed in the same manner as in the sealing step ( S10 ) of the first embodiment, where the magnet powder 12 filled in the met...

Embodiment

[0099] Sm-Fe-N magnets were produced and their magnetic properties were evaluated.

[0100] (Production of Sm-Fe-N magnet)

[0101] The methods for producing the magnets of Examples 1 to 7 and Comparative Example 1 will be described. Table 1 summarizes the main components of the magnet manufacturing methods of Examples 1 to 7 and Comparative Example 1. Next, the manufacturing method of each magnet will be described in detail.

[0102] [Table 1]

[0103]

[0104] First, the method for producing the magnet of Example 1 will be described. After the magnet powder is filled in the metal sheath, the end of the sheath is sealed by manual pressure to perform a sealing process. Magnet powder uses Sm 2 Fe 17 N 3 powder. The particle size of the magnet powder is set to be about 10 μm or less. A stainless steel sheath with a flat cross-sectional shape is used for the metal sheath. The material of the stainless steel sheath is SUS304. The size of the stainless steel sheath is...

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Abstract

The method for manufacturing an Sm-Fe-N magnet comprises: a seal step (S10) for filling magnet powder having an Sm-Fe-N compound as a main component into a metal sheath and performing a seal; a magnetic field application step (S12) for applying a magnetic field to the magnet powder sealed with the metal sheath and magnetic-field-orienting the magnet powder to align the magnetic field orienting direction into one direction, thereby performing magnetization; a preliminary rolling step (S14) for preliminary rolling the magnet powder sealed with the metal sheath and magnetic field oriented, to a green compact, the magnet powder that is magnetic-field-oriented; and a pressurizing step (S16) for pressurizing the green compact sealed with the metal sheath and densifying the green compact to form a magnet, wherein in the preliminary rolling step (S14), the magnet powder sealed with the metal sheath and magnetic-field-oriented is slightly rolled with a smaller pressure than a pressure in the pressurizing step (S16).

Description

technical field [0001] The present disclosure relates to a method of manufacturing a Sm-Fe-N magnet, a Sm-Fe-N magnet, and a motor having a Sm-Fe-N magnet. Background technique [0002] Sm-Fe-N magnets are magnets excellent in magnetic properties and corrosion resistance. It is known that the Sm-Fe-N compound constituting the Sm-Fe-N magnet is thermally decomposed at high temperature. Therefore, for Sm-Fe-N magnets, it is difficult to manufacture bulk magnets through sintering treatment at high temperature. In contrast, as a method of manufacturing an Sm—Fe—N magnet without sintering, a method of manufacturing an Sm—Fe—N magnet by rolling has been proposed (see Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2005-340261 Contents of the invention [0006] The problem to be solved by the invention [0007] However, although the Sm-Fe-N magnet produced by rolling as described above can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02B22F1/00B22F3/00B22F3/02C22C38/00H01F1/059
CPCH02K1/02C22C2202/02B22F7/08B22F7/062C22C33/0257B22F2999/00B22F2998/10H01F41/0273H01F1/0556H01F1/059B22F3/18B22F2202/05B22F3/12H01F41/0266
Inventor 江口晴树野村昭博米山夏树高桥宽郎原崎修吉泽广喜中野渡功
Owner IHI CORP