RU2008135113A - R-T-B ALLOY TYPE AND METHOD OF ITS MANUFACTURE, FINE POWDER FOR RARE-EARTH PERMANENT MAGNET R-T-B TYPE AND RARE-EARTH PERMANENT MAGNET R-T-B TYPE - Google Patents

R-T-B ALLOY TYPE AND METHOD OF ITS MANUFACTURE, FINE POWDER FOR RARE-EARTH PERMANENT MAGNET R-T-B TYPE AND RARE-EARTH PERMANENT MAGNET R-T-B TYPE Download PDF

Info

Publication number
RU2008135113A
RU2008135113A RU2008135113/02A RU2008135113A RU2008135113A RU 2008135113 A RU2008135113 A RU 2008135113A RU 2008135113/02 A RU2008135113/02 A RU 2008135113/02A RU 2008135113 A RU2008135113 A RU 2008135113A RU 2008135113 A RU2008135113 A RU 2008135113A
Authority
RU
Russia
Prior art keywords
type
alloy
phase
permanent magnet
rich
Prior art date
Application number
RU2008135113/02A
Other languages
Russian (ru)
Other versions
RU2389097C1 (en
Inventor
Кенитиро НАКАДЗИМА (JP)
Кенитиро НАКАДЗИМА
Хироси ХАСЕГАВА (JP)
Хироси ХАСЕГАВА
Original Assignee
Сова Денко К.К. (Jp)
Сова Денко К.К.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Сова Денко К.К. (Jp), Сова Денко К.К. filed Critical Сова Денко К.К. (Jp)
Publication of RU2008135113A publication Critical patent/RU2008135113A/en
Application granted granted Critical
Publication of RU2389097C1 publication Critical patent/RU2389097C1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • 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
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • 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
    • 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
    • B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, 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
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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
    • H01F1/058—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
    • 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
    • H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

1. Сплав R-T-B типа, где R является по меньшей мере одним элементом, выбранным из Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb и Lu; T является переходным металлом, который содержит 80 мас.% или более Fe; и В является содержащим 50 мас.% или более бора (B) и также содержащим по меньшей мере один элемент из С и N в пределах диапазона от 0 до менее 50 мас.%, который является исходным материалом для использования в постоянном магните на основе редкоземельных элементов и содержит по меньшей мере Dy, причем упомянутый сплав R-T-B типа содержит: ! основную фазу, такую как фаза R2T14B, обладающую магнитными свойствами; ! богатую R фазу, которая обогащена R по сравнению с его долей в общем составе сплава; и ! богатую Dy область, которая образована вблизи богатой R фазы и обогащена Dy по сравнению с его долей в составе. ! 2. Сплав R-T-B типа по п.1, в котором концентрация Dy является более низкой в основной фазе, чем в богатой Dy области и более низкой в богатой R фазе, чем в основной фазе. ! 3. Сплав R-T-B типа по п.1, причем этот сплав представляет собой пластинку, имеющую среднюю толщину от 0,1 до 1 мм, изготовленную способом ленточной разливки. ! 4. Способ изготовления сплава R-T-B типа по п.1, содержащий этапы, на которых: ! изготавливают пластинку, имеющую среднюю толщину от 0,1 до 1 мм; и ! подают расплавленный сплав на охлаждающий валок со средней скоростью 10 г/с или более на 1 см ширины. ! 5. Способ изготовления сплава R-T-B типа по п.4, в котором пластинку сплава R-T-B типа, скатившуюся с охлаждающего валка, выдерживают при температуре от 600 до 900°C в течение 30 с или более. ! 6. Тонкодисперсный порошок для редкоземельного постоянного магнита R-T-B типа, который изготовлен из сплава R-T-B типа по любому из пп.1-1. An alloy of the R-T-B type, where R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu; T is a transition metal that contains 80 wt.% Or more Fe; and B is containing 50 wt.% or more boron (B) and also containing at least one element of C and N within the range from 0 to less than 50 wt.%, which is the starting material for use in a rare earth permanent magnet elements and contains at least Dy, wherein said RTB type alloy contains:! a main phase, such as the R2T14B phase, having magnetic properties; ! rich in R phase, which is enriched in R compared with its share in the total composition of the alloy; and! Dy-rich region, which is formed near the R-rich phase and enriched in Dy in comparison with its share in the composition. ! 2. The R-T-B type alloy according to claim 1, wherein the concentration of Dy is lower in the main phase than in the rich Dy region and lower in the rich R phase than in the main phase. ! 3. The R-T-B type alloy according to claim 1, wherein the alloy is a plate having an average thickness of 0.1 to 1 mm made by a tape casting method. ! 4. A method of manufacturing an R-T-B type alloy according to claim 1, comprising the steps of:! make a plate having an average thickness of from 0.1 to 1 mm; and! the molten alloy is fed to the cooling roll at an average speed of 10 g / s or more per 1 cm of width. ! 5. A method of manufacturing an R-T-B type alloy according to claim 4, wherein the R-T-B type alloy plate rolled from the cooling roll is held at a temperature of from 600 to 900 ° C for 30 s or more. ! 6. Fine powder for a rare-earth permanent magnet of R-T-B type, which is made of an alloy of R-T-B type according to any one of claims 1-

Claims (7)

1. Сплав R-T-B типа, где R является по меньшей мере одним элементом, выбранным из Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb и Lu; T является переходным металлом, который содержит 80 мас.% или более Fe; и В является содержащим 50 мас.% или более бора (B) и также содержащим по меньшей мере один элемент из С и N в пределах диапазона от 0 до менее 50 мас.%, который является исходным материалом для использования в постоянном магните на основе редкоземельных элементов и содержит по меньшей мере Dy, причем упомянутый сплав R-T-B типа содержит:1. An alloy of the R-T-B type, where R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu; T is a transition metal that contains 80 wt.% Or more Fe; and B is containing 50 wt.% or more boron (B) and also containing at least one element of C and N within the range from 0 to less than 50 wt.%, which is the starting material for use in a rare earth permanent magnet elements and contains at least Dy, wherein said RTB type alloy contains: основную фазу, такую как фаза R2T14B, обладающую магнитными свойствами;a main phase, such as an R 2 T 14 B phase, having magnetic properties; богатую R фазу, которая обогащена R по сравнению с его долей в общем составе сплава; иrich in R phase, which is enriched in R compared with its share in the total composition of the alloy; and богатую Dy область, которая образована вблизи богатой R фазы и обогащена Dy по сравнению с его долей в составе.Dy-rich region, which is formed near the R-rich phase and enriched in Dy in comparison with its share in the composition. 2. Сплав R-T-B типа по п.1, в котором концентрация Dy является более низкой в основной фазе, чем в богатой Dy области и более низкой в богатой R фазе, чем в основной фазе.2. The R-T-B type alloy according to claim 1, wherein the concentration of Dy is lower in the main phase than in the rich Dy region and lower in the rich R phase than in the main phase. 3. Сплав R-T-B типа по п.1, причем этот сплав представляет собой пластинку, имеющую среднюю толщину от 0,1 до 1 мм, изготовленную способом ленточной разливки.3. The R-T-B type alloy according to claim 1, wherein the alloy is a plate having an average thickness of 0.1 to 1 mm made by a tape casting method. 4. Способ изготовления сплава R-T-B типа по п.1, содержащий этапы, на которых:4. A method of manufacturing an R-T-B type alloy according to claim 1, comprising the steps of: изготавливают пластинку, имеющую среднюю толщину от 0,1 до 1 мм; иmake a plate having an average thickness of from 0.1 to 1 mm; and подают расплавленный сплав на охлаждающий валок со средней скоростью 10 г/с или более на 1 см ширины.the molten alloy is fed to the cooling roll at an average speed of 10 g / s or more per 1 cm of width. 5. Способ изготовления сплава R-T-B типа по п.4, в котором пластинку сплава R-T-B типа, скатившуюся с охлаждающего валка, выдерживают при температуре от 600 до 900°C в течение 30 с или более.5. A method of manufacturing an R-T-B type alloy according to claim 4, wherein the R-T-B type alloy plate rolled from the cooling roll is held at a temperature of from 600 to 900 ° C for 30 s or more. 6. Тонкодисперсный порошок для редкоземельного постоянного магнита R-T-B типа, который изготовлен из сплава R-T-B типа по любому из пп.1-3 или из сплава R-T-B типа, изготовленного способом изготовления сплава R-T-B типа по п.4 или 5.6. Fine powder for an R-T-B type rare earth permanent magnet, which is made of an R-T-B type alloy according to any one of claims 1 to 3, or of an R-T-B type alloy made by a method of manufacturing an R-T-B type alloy according to claim 4 or 5. 7. Редкоземельный постоянный магнит R-T-B типа, изготовленный из тонкодисперсного порошка для редкоземельного постоянного магнита R-T-B типа по п.6. 7. R-T-B type rare earth permanent magnet made from fine powder for the R-T-B type rare earth permanent magnet according to claim 6.
RU2008135113/02A 2007-02-05 2008-01-28 Alloy of r-t-b type and procedure for its production, fine dispersed powder for rare earth permanent magnet r-t-b type and rare earth permanent magnet of r-t-b type RU2389097C1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-025504 2007-02-05
JP2007025504 2007-02-05

Publications (2)

Publication Number Publication Date
RU2008135113A true RU2008135113A (en) 2010-03-10
RU2389097C1 RU2389097C1 (en) 2010-05-10

Family

ID=39681532

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2008135113/02A RU2389097C1 (en) 2007-02-05 2008-01-28 Alloy of r-t-b type and procedure for its production, fine dispersed powder for rare earth permanent magnet r-t-b type and rare earth permanent magnet of r-t-b type

Country Status (8)

Country Link
US (1) US20090035170A1 (en)
EP (1) EP1988183A4 (en)
JP (1) JP2008214747A (en)
KR (1) KR101036968B1 (en)
CN (1) CN101541996A (en)
RU (1) RU2389097C1 (en)
TW (1) TW200903532A (en)
WO (1) WO2008096621A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112009003804B4 (en) * 2008-12-26 2014-02-13 Showa Denko K.K. Alloy material for a rare earth permanent magnet of the R-T-B system, method of making a rare earth permanent magnet of the R-T-B system
JP5767788B2 (en) * 2010-06-29 2015-08-19 昭和電工株式会社 R-T-B rare earth permanent magnet, motor, automobile, generator, wind power generator
JP2012015168A (en) * 2010-06-29 2012-01-19 Showa Denko Kk R-t-b-based rare earth permanent magnet, motor, vehicle, generator and wind power generator
JP5753481B2 (en) * 2011-11-28 2015-07-22 中央電気工業株式会社 Rare earth alloy and method for producing the same
US10497497B2 (en) 2012-02-02 2019-12-03 Santoku Corporation R-T-B—Ga-based magnet material alloy and method of producing the same
CN104674115A (en) 2013-11-27 2015-06-03 厦门钨业股份有限公司 Low-B rare earth magnet
CN104952574A (en) 2014-03-31 2015-09-30 厦门钨业股份有限公司 Nd-Fe-B-Cu type sintered magnet containing W
CN105321647B (en) 2014-07-30 2018-02-23 厦门钨业股份有限公司 The preparation method of rare-earth magnet quick cooling alloy and rare-earth magnet
GB2536939A (en) * 2015-04-01 2016-10-05 Isis Innovation Method for designing alloys
EP3279906A4 (en) * 2015-04-02 2018-07-04 Xiamen Tungsten Co. Ltd. Ho and w-containing rare-earth magnet
JP6614084B2 (en) * 2016-09-26 2019-12-04 信越化学工業株式会社 Method for producing R-Fe-B sintered magnet
JP6863008B2 (en) * 2017-03-30 2021-04-21 Tdk株式会社 Method for manufacturing RTB-based rare earth sintered magnet alloy and RTB-based rare earth sintered magnet
CN106920620A (en) * 2017-04-05 2017-07-04 北京京磁电工科技有限公司 Neodymium iron boron magnetic body and preparation method thereof
KR102045402B1 (en) 2018-04-30 2019-11-15 성림첨단산업(주) Manufacturing method of rare earth sintered magnet

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3721831B2 (en) * 1999-03-11 2005-11-30 昭和電工株式会社 Rare earth magnet alloy and method for producing the same
EP1880782B1 (en) * 2000-10-06 2015-01-07 Santoku Corporation A method for evaluating a raw alloy for a magnet
EP1365422B1 (en) * 2001-01-30 2012-04-25 Hitachi Metals, Ltd. Method for preparation of permanent magnet
US7201810B2 (en) * 2001-03-30 2007-04-10 Neomax Co., Ltd. Rare earth alloy sintered compact and method of making the same
US7258751B2 (en) * 2001-06-22 2007-08-21 Neomax Co., Ltd. Rare earth magnet and method for production thereof
JP4389427B2 (en) * 2002-02-05 2009-12-24 日立金属株式会社 Sintered magnet using alloy powder for rare earth-iron-boron magnet
WO2005023462A1 (en) * 2003-08-27 2005-03-17 Mitsubishi Materials Corporation Rare earth magnet powder and method for production thereof
EP1749599B1 (en) * 2004-04-30 2015-09-09 Hitachi Metals, Ltd. Methods for producing raw material alloy for rare earth magnet, powder and sintered magnet
JP5339722B2 (en) * 2005-03-18 2013-11-13 株式会社アルバック Film forming method, film forming apparatus, permanent magnet, and manufacturing method of permanent magnet
CN101006534B (en) * 2005-04-15 2011-04-27 日立金属株式会社 Rare earth sintered magnet and process for producing the same
JP2006310660A (en) * 2005-04-28 2006-11-09 Neomax Co Ltd High electric resistance r-t-b based sintered magnet and its production process
JP4832856B2 (en) * 2005-10-31 2011-12-07 昭和電工株式会社 Method for producing RTB-based alloy and RTB-based alloy flakes, fine powder for RTB-based rare earth permanent magnet, RTB-based rare earth permanent magnet

Also Published As

Publication number Publication date
KR20080106211A (en) 2008-12-04
EP1988183A1 (en) 2008-11-05
JP2008214747A (en) 2008-09-18
CN101541996A (en) 2009-09-23
EP1988183A4 (en) 2012-01-25
RU2389097C1 (en) 2010-05-10
KR101036968B1 (en) 2011-05-25
US20090035170A1 (en) 2009-02-05
WO2008096621A1 (en) 2008-08-14
TW200903532A (en) 2009-01-16

Similar Documents

Publication Publication Date Title
RU2008135113A (en) R-T-B ALLOY TYPE AND METHOD OF ITS MANUFACTURE, FINE POWDER FOR RARE-EARTH PERMANENT MAGNET R-T-B TYPE AND RARE-EARTH PERMANENT MAGNET R-T-B TYPE
RU2008144139A (en) R-T-B SYSTEM ALLOY AND R-T-B SYSTEM METHOD
US9997284B2 (en) Sintered magnet
EP2590181B1 (en) Process of manufacturing an r-t-b based rare earth permanent magnet
ES2706798T3 (en) Rare earth magnet with low B content
EP2436016B1 (en) Nd-fe-b permanent magnetic material and preparation method thereof
CN106128670B (en) A kind of low-cost rare earth iron boron permanent magnet and preparation method thereof
CN101266855B (en) Rare earth permanent magnetism material and its making method
US10811175B2 (en) Alloy material, bonded magnet, and modification method of rare-earth permanent magnetic powder
CN104900360B (en) A kind of permanent-magnet alloy for adding compound low price rare earth and preparation method thereof
US20120091844A1 (en) Alloy material for r-t-b type rare earth permanent magnet, method for producing r-t-b type rare earth permanent magnet, and motor
TW201222575A (en) R-T-B rare earth sintered magnet
CN103187133B (en) A kind of RE permanent magnetic alloy and Magnetic Phase composite preparation process thereof
BRPI0600224B1 (en) PERMANENT RARE EARTH MAGNET WITH GRADUATE FUNCTIONALITY
KR20130115151A (en) Rare earth sintered magnet and making method
WO2009075351A1 (en) R-t-b alloy, process for production of r-t-b alloy, fine powder for r-t-b rare earth permanent magnets, and r-t-b rare earth permanent magnets
JP2012199270A (en) R-t-b rare earth sintered magnet
US9601979B2 (en) Alloy material for R-T-B system rare earth permanent magnet, method for producing R-T-B system rare earth permanent magnet, and motor
CN105225781A (en) A kind of high corrosion-resistant many Hard Magnetics principal phase Ce permanent magnet and preparation method thereof
CN106319323B (en) A kind of Sintered NdFeB magnet assistant alloy slab and preparation method thereof
CN103757586A (en) Method of infiltrating metal infiltrating agent to cerium-containing neodymium iron boron magnetic material
JP2012190949A (en) Rare-earth magnet and production method therefor
JP6506182B2 (en) Rare earth-containing alloy flakes, method for producing the same and sintered magnet
JP7424126B2 (en) RTB series permanent magnet
US10546672B2 (en) Rare earth based magnet

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20140129