JP6801801B2 - R−tm−b系焼結磁石 - Google Patents
R−tm−b系焼結磁石 Download PDFInfo
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- JP6801801B2 JP6801801B2 JP2020012756A JP2020012756A JP6801801B2 JP 6801801 B2 JP6801801 B2 JP 6801801B2 JP 2020012756 A JP2020012756 A JP 2020012756A JP 2020012756 A JP2020012756 A JP 2020012756A JP 6801801 B2 JP6801801 B2 JP 6801801B2
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
-
- 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
- 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
- H01F1/06—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 in the form of particles, e.g. powder
- H01F1/08—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 in the form of particles, e.g. powder pressed, sintered, or bound together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/044—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by jet milling
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
本発明のR-TM-B系焼結磁石は、24.5〜34.5質量%のR(RはYを含む希土類元素から選ばれる少なくとも1種)と、0.85〜1.15質量%のBと、0.1質量%未満のCoと、0.07〜0.5質量%のGaと、0〜0.4質量%のCuと、不可避不純物と、残部Feとを含有するR-TM-B系焼結磁石であって、
前記Ga及びCuの含有量が、Ga量(質量%)及びCu量(質量%)をそれぞれX軸及びY軸としたXY平面上で、点A(0.5、0.0)、点B(0.5、0.4)、点C(0.07、0.4)、点D(0.07、0.1)及び点E(0.2、0.0)を頂点とする五角形で囲まれる領域内にあることを特徴とする。
本発明のR-TM-B系焼結磁石は円筒状であるのが好ましい。前記円筒状磁石は、異方性方向としてラジアル異方性又は極異方性を有するのが好ましい。円筒状(リング形状)とすることで、回転機として組み立てる際の組立工数を低減することができる。
Ndを24.80質量%、Prを6.90質量%、Dyを1.15質量%、Bを0.96質量%、Nbを0.15質量%、Alを0.10質量%含有し、Ga及びCuの含有量を表1に示すようにそれぞれ0.1、0.2、0.3、0.4、0.5質量%及び0.02、0.1、0.2、0.3、0.4質量%の範囲で変更し、残部としてFe及び不可避不純物を含有する25種類の組成の合金をストリップキャスト法により作製した。これらの合金には、不可避不純物としてCoが0.06質量%含有していた。なお、前記Cu含有量は不可避不純物として含まれる0.02質量%のCuを含んだ値である。
Ndを24.80質量%、Prを6.90質量%、Dyを1.15質量%、Bを0.96質量%、Nbを0.15質量%、Alを0.10質量%、Gaを0.30質量%及びCuを0.15質量%含有し、残部としてFe及び不可避不純物を含有する合金Aをストリップキャスト法により作製した。この合金Aには、不可避不純物としてCoが0.06質量%含有していた。
実験例1で得られた、Ga含有量及びCu含有量がそれぞれ0.1質量%及び0.02質量%の合金1と、Ga含有量及びCu含有量がそれぞれ0.5質量%及び0.4質量%の合金4とについて、120℃100%RH、2気圧及び24時間の条件でプレッシャークッカーテストを行い、テスト後の腐食の様子をSEMで観察した。結果を図2に示す。
Co含有量がR-TM-B系焼結磁石の機械的強度に与える影響を評価するため、以下の実験を行った。
実験例4と同様にして準備した13種類の合金の微粉を用いて、図4に示す成形装置100で磁場中圧縮成形(圧力:80 MPa、磁場強度については全ての条件で同じ磁場強度(パルス磁場)とした。)し、外周面に8極を有するR-TM-B系極異方性リング磁石の成形体(外径31.5 mm×内径20.3 mm×高さ27.8 mm)を得た。各合金について、それぞれ10個の成形体を作製した。
実験例1と同様にして準備した25種類の合金の微粉を用いた以外、実験例4と同様にして本発明例のラジアル異方性焼結リング磁石を製作した。その結果、これらの25種のラジアル異方性焼結リング磁石は、全て研削加工後の割れが発生しなかった。
実験例1と同様にして準備した25種類の合金の微粉を用いた以外、実験例5と同様にして本発明例の極異方性焼結リング磁石を製作した。その結果、これらの25種のラジアル異方性焼結リング磁石は、全て研削加工後の割れが発生しなかった。
Claims (7)
- 24.5〜34.5質量%のR(RはYを含む希土類元素から選ばれる少なくとも1種)と、0.89〜1.15質量%のBと、0.1質量%未満のCoと、0.3〜0.5質量%のGaと、0.15〜0.4質量%のCuと、不可避不純物と、残部Feとを含有することを特徴とするR-TM-B系焼結磁石。
- 請求項1に記載のR-TM-B系焼結磁石において、
3質量%以下のM(MはZr、Nb、Hf、Ta、W、Mo、Al、Si、V、Cr、Ti、Ag、Mn、Ge、Sn、Bi、Pb及びZnから選ばれる少なくとも1種)をさらに含有することを特徴とするR-TM-B系焼結磁石。 - 請求項1又は2に記載のR-TM-B系焼結磁石において、
前記B含有量が0.96〜1.15質量%であることを特徴とするR-TM-B系焼結磁石。 - 請求項1〜3のいずれかに記載のR-TM-B系焼結磁石において、
前記R-TM-B系焼結磁石が、円筒状ラジアル異方性磁石又は円筒状極異方性磁石であることを特徴とするR-TM-B系焼結磁石。 - 請求項1〜4のいずれかに記載のR-TM-B系焼結磁石において、120℃、100%RH、2気圧及び96時間の条件でプレッシャークッカーテストを行ったときの腐食減量が2 mg/cm2未満であることを特徴とするR-TM-B系焼結磁石。
- 請求項1〜4のいずれかに記載のR-TM-B系焼結磁石において、120℃、100%RH、2気圧及び96時間の条件でプレッシャークッカーテストを行ったときの腐食減量が0.85 mg/cm2以下であることを特徴とするR-TM-B系焼結磁石。
- 請求項1〜4のいずれかに記載のR-TM-B系焼結磁石において、120℃、100%RH、2気圧及び96時間の条件でプレッシャークッカーテストを行ったときの腐食減量が0.76 mg/cm2以下であることを特徴とするR-TM-B系焼結磁石。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2020189487A JP6984716B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
JP2020189481A JP6984715B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
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JP2015066185 | 2015-03-27 | ||
JP2015066185 | 2015-03-27 |
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JP2017509820A Division JP6658737B2 (ja) | 2015-03-27 | 2016-03-22 | R−tm−b系焼結磁石 |
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JP2020189487A Division JP6984716B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
JP2020189481A Division JP6984715B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
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JP2020096187A JP2020096187A (ja) | 2020-06-18 |
JP6801801B2 true JP6801801B2 (ja) | 2020-12-16 |
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JP2017509820A Active JP6658737B2 (ja) | 2015-03-27 | 2016-03-22 | R−tm−b系焼結磁石 |
JP2020012756A Active JP6801801B2 (ja) | 2015-03-27 | 2020-01-29 | R−tm−b系焼結磁石 |
JP2020189487A Active JP6984716B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
JP2020189481A Active JP6984715B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
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JP2020189481A Active JP6984715B2 (ja) | 2015-03-27 | 2020-11-13 | R−tm−b系焼結磁石 |
Country Status (5)
Country | Link |
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US (1) | US20180025818A1 (ja) |
JP (4) | JP6658737B2 (ja) |
CN (1) | CN107251169A (ja) |
DE (1) | DE112016001436T5 (ja) |
WO (1) | WO2016158552A1 (ja) |
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JP2018059197A (ja) * | 2016-09-30 | 2018-04-12 | 日立金属株式会社 | R−tm−b系焼結磁石 |
CN109979698A (zh) * | 2017-12-28 | 2019-07-05 | 深圳市鸿效节能股份有限公司 | 一种天然气节能净化装置及其制造方法 |
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US7740714B2 (en) * | 2005-12-13 | 2010-06-22 | Shin-Etsu Chemical Co., Ltd. | Method for preparing radially anisotropic magnet |
JP2007305878A (ja) * | 2006-05-12 | 2007-11-22 | Ulvac Japan Ltd | 永久磁石及び永久磁石の製造方法 |
JP5117220B2 (ja) * | 2007-10-31 | 2013-01-16 | 株式会社アルバック | 永久磁石の製造方法 |
CN101266856A (zh) * | 2007-12-28 | 2008-09-17 | 烟台正海磁性材料有限公司 | 耐蚀性优异的高性能R-Fe-B系烧结磁体及其制造方法 |
EP2273513B1 (en) * | 2008-03-31 | 2019-10-16 | Hitachi Metals, Ltd. | R-t-b-type sintered magnet and method for production thereof |
JP4831253B2 (ja) * | 2008-06-13 | 2011-12-07 | 日立金属株式会社 | R−T−Cu−Mn−B系焼結磁石 |
JP6303480B2 (ja) * | 2013-03-28 | 2018-04-04 | Tdk株式会社 | 希土類磁石 |
ES2749754T3 (es) * | 2013-03-29 | 2020-03-23 | Hitachi Metals Ltd | Imán sinterizado a base de R-T-B |
JP5999080B2 (ja) * | 2013-07-16 | 2016-09-28 | Tdk株式会社 | 希土類磁石 |
CN109065313A (zh) * | 2014-03-27 | 2018-12-21 | 日立金属株式会社 | R-t-b系合金粉末及其制造方法、以及r-t-b系烧结磁铁及其制造方法 |
JP6572550B2 (ja) * | 2015-02-04 | 2019-09-11 | Tdk株式会社 | R−t−b系焼結磁石 |
JP2018059197A (ja) * | 2016-09-30 | 2018-04-12 | 日立金属株式会社 | R−tm−b系焼結磁石 |
-
2016
- 2016-03-22 US US15/549,777 patent/US20180025818A1/en not_active Abandoned
- 2016-03-22 CN CN201680010730.7A patent/CN107251169A/zh active Pending
- 2016-03-22 WO PCT/JP2016/058917 patent/WO2016158552A1/ja active Application Filing
- 2016-03-22 JP JP2017509820A patent/JP6658737B2/ja active Active
- 2016-03-22 DE DE112016001436.8T patent/DE112016001436T5/de active Pending
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2020
- 2020-01-29 JP JP2020012756A patent/JP6801801B2/ja active Active
- 2020-11-13 JP JP2020189487A patent/JP6984716B2/ja active Active
- 2020-11-13 JP JP2020189481A patent/JP6984715B2/ja active Active
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Publication number | Publication date |
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JPWO2016158552A1 (ja) | 2018-01-18 |
JP6658737B2 (ja) | 2020-03-04 |
DE112016001436T5 (de) | 2017-12-21 |
JP6984715B2 (ja) | 2021-12-22 |
CN107251169A (zh) | 2017-10-13 |
JP2021038463A (ja) | 2021-03-11 |
JP2020096187A (ja) | 2020-06-18 |
JP2021038464A (ja) | 2021-03-11 |
WO2016158552A1 (ja) | 2016-10-06 |
US20180025818A1 (en) | 2018-01-25 |
JP6984716B2 (ja) | 2021-12-22 |
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