JP4743120B2 - 希土類磁石の製造方法および含浸装置 - Google Patents
希土類磁石の製造方法および含浸装置 Download PDFInfo
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- JP4743120B2 JP4743120B2 JP2006536499A JP2006536499A JP4743120B2 JP 4743120 B2 JP4743120 B2 JP 4743120B2 JP 2006536499 A JP2006536499 A JP 2006536499A JP 2006536499 A JP2006536499 A JP 2006536499A JP 4743120 B2 JP4743120 B2 JP 4743120B2
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- powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/1208—Containers or coating used therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
2 下パンチ
3 上パンチ
4 原料粉末
5 コイル
7 コイル
10 プレス装置
20 成形体
21 酸化防止剤
22 溶液槽
23 空気
24 クラック
まず、希土類元素R(Rは、Y、La、Ce、Pr、Sm、Eu、Gd、Tb、Dy、Ho、Tm、Yb、およびLuからなる群から選択された少なくとも1種の元素):10原子%〜30原子%、B:0.5原子%〜28原子%、残部:Fe、および不可避的不純物を含有するR−Fe−B系合金の溶湯を作製する。ただし、Feの1部をCo、Niの1種または2種にて置換してもよいし、Bの一部をCで置換しても良い。本発明によれば、酸素含有量を低減し、希土類元素Rの酸化物生成を抑制できるため、希土類元素Rの量を必要最小限度に低く抑えることが可能である。なお、希土類元素Rは、Dy、Tb、およびHoなどの重希土類元素を希土類元素全体の10原子%以上含むことが好ましい。
まず、Nd+Pr(30.0質量%)−Dy(1.0質量%)−B(1.0質量%)−Fe(残部)の組成を有する合金の溶湯を高周波溶解炉によって作製した後、水冷ロール式のストリップキャスティング法によって上記溶湯を冷却し、厚さ0.5mm程度の薄板状鋳片(フレーク状合金)を作製した。このフレーク状合金の含有酸素濃度は150質量ppmだった。
Claims (7)
- 希土類合金粉末を乾式プレス法で圧縮成形することによって密度ばらつきのある粉末成形体を作製するプレス工程(A)と、
前記粉末成形体の表面から酸化防止剤を前記粉末成形体に含浸させる工程(B)と、
前記粉末成形体を焼結させる工程(C)と、
を包含し、
前記工程(B)は、
前記粉末成形体を前記容器内に収納する工程と、
前記粉末成形体が収納された前記容器の内部を減圧する工程と、
前記容器の内部が減圧された後、前記容器の内部に前記酸化防止剤を供給する工程と、
を含む、R−Fe−B系希土類磁石の製造方法。 - 前記希土類合金粉末は、酸素含有量が重量比で50ppm以上4000ppm以下、窒素含有量が重量比で150ppm以上1500ppm以下である、請求項1に記載の製造方法。
- 前記工程(C)は、
700℃以上1000℃未満の温度範囲に10分以上420分以下の時間保持する第1工程と、
1000℃以上1200℃以下の温度範囲で焼結を進行させる第2工程と、
を含む、請求項1に記載の製造方法。 - 前記希土類合金粉末の平均粒径を1.0μm以上5.0μm以下とする請求項1に記載の製造方法。
- 前記酸化防止剤は揮発性を有する成分から構成されている請求項1に記載の製造方法。
- 前記工程(B)の後、前記酸化防止剤の揮発によって、前記粉末成形体の温度を少なくとも一時的に低下させる請求項5に記載の製造方法。
- 前記酸化防止剤は、イソパラフィンである請求項1に記載の製造方法。
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JP2006536499A JP4743120B2 (ja) | 2005-03-14 | 2006-03-10 | 希土類磁石の製造方法および含浸装置 |
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JP2005071053 | 2005-03-14 | ||
JP2005071053 | 2005-03-14 | ||
PCT/JP2006/304731 WO2006098238A1 (ja) | 2005-03-14 | 2006-03-10 | 希土類磁石の製造方法および含浸装置 |
JP2006536499A JP4743120B2 (ja) | 2005-03-14 | 2006-03-10 | 希土類磁石の製造方法および含浸装置 |
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JPWO2006098238A1 JPWO2006098238A1 (ja) | 2008-08-21 |
JP4743120B2 true JP4743120B2 (ja) | 2011-08-10 |
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JP (1) | JP4743120B2 (ja) |
CN (1) | CN1989581A (ja) |
WO (1) | WO2006098238A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101447301B1 (ko) * | 2006-09-15 | 2014-10-06 | 인터메탈릭스 가부시키가이샤 | NdFeB 소결자석의 제조방법 |
GB0912349D0 (en) * | 2009-07-16 | 2009-08-26 | Magnequench Internat Inc | Process for manufacture of a bonded magnet |
JP6222518B2 (ja) * | 2013-09-30 | 2017-11-01 | 日立金属株式会社 | R−t−b系焼結磁石の製造方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63255302A (ja) * | 1987-04-09 | 1988-10-21 | Daido Steel Co Ltd | 多孔質磁石の製造方法 |
JPH02163906A (ja) * | 1988-12-17 | 1990-06-25 | Tokin Corp | ボンド磁石の製造方法 |
JPH04273413A (ja) * | 1991-02-28 | 1992-09-29 | Shin Etsu Polymer Co Ltd | 希土類ボンド磁石の製造方法 |
JPH06267720A (ja) * | 1993-03-16 | 1994-09-22 | Sankyo Seiki Mfg Co Ltd | 樹脂結合型希土類磁石及びその製造方法 |
JPH1167514A (ja) * | 1997-08-19 | 1999-03-09 | Sumitomo Metal Ind Ltd | ボンド型永久磁石の製造方法と製造用原料粉末 |
JPH11224811A (ja) * | 1998-02-05 | 1999-08-17 | Daido Denshi:Kk | 希土類ボンド磁石とその製造方法 |
JP2002008935A (ja) * | 1999-11-12 | 2002-01-11 | Sumitomo Special Metals Co Ltd | 希土類磁石の製造方法 |
JP2002020802A (ja) * | 2000-04-21 | 2002-01-23 | Sumitomo Special Metals Co Ltd | 粉体プレス装置および当該装置を用いた希土類磁石の製造方法 |
JP2002170728A (ja) * | 2000-09-19 | 2002-06-14 | Sumitomo Special Metals Co Ltd | 希土類磁石およびその製造方法 |
JP2005294556A (ja) * | 2004-03-31 | 2005-10-20 | Tdk Corp | 希土類焼結磁石の製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000124052A (ja) * | 1998-10-20 | 2000-04-28 | Citizen Watch Co Ltd | ボンド磁石の製造方法 |
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- 2006-03-10 JP JP2006536499A patent/JP4743120B2/ja active Active
- 2006-03-10 WO PCT/JP2006/304731 patent/WO2006098238A1/ja active Application Filing
- 2006-03-10 CN CNA2006800004896A patent/CN1989581A/zh active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63255302A (ja) * | 1987-04-09 | 1988-10-21 | Daido Steel Co Ltd | 多孔質磁石の製造方法 |
JPH02163906A (ja) * | 1988-12-17 | 1990-06-25 | Tokin Corp | ボンド磁石の製造方法 |
JPH04273413A (ja) * | 1991-02-28 | 1992-09-29 | Shin Etsu Polymer Co Ltd | 希土類ボンド磁石の製造方法 |
JPH06267720A (ja) * | 1993-03-16 | 1994-09-22 | Sankyo Seiki Mfg Co Ltd | 樹脂結合型希土類磁石及びその製造方法 |
JPH1167514A (ja) * | 1997-08-19 | 1999-03-09 | Sumitomo Metal Ind Ltd | ボンド型永久磁石の製造方法と製造用原料粉末 |
JPH11224811A (ja) * | 1998-02-05 | 1999-08-17 | Daido Denshi:Kk | 希土類ボンド磁石とその製造方法 |
JP2002008935A (ja) * | 1999-11-12 | 2002-01-11 | Sumitomo Special Metals Co Ltd | 希土類磁石の製造方法 |
JP2002020802A (ja) * | 2000-04-21 | 2002-01-23 | Sumitomo Special Metals Co Ltd | 粉体プレス装置および当該装置を用いた希土類磁石の製造方法 |
JP2002170728A (ja) * | 2000-09-19 | 2002-06-14 | Sumitomo Special Metals Co Ltd | 希土類磁石およびその製造方法 |
JP2005294556A (ja) * | 2004-03-31 | 2005-10-20 | Tdk Corp | 希土類焼結磁石の製造方法 |
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JPWO2006098238A1 (ja) | 2008-08-21 |
CN1989581A (zh) | 2007-06-27 |
WO2006098238A1 (ja) | 2006-09-21 |
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