CN1291776A - R-Fe-B型烧结磁体的生产方法、该磁体的合金粉材料制法及保存法 - Google Patents
R-Fe-B型烧结磁体的生产方法、该磁体的合金粉材料制法及保存法 Download PDFInfo
- Publication number
- CN1291776A CN1291776A CN00123900A CN00123900A CN1291776A CN 1291776 A CN1291776 A CN 1291776A CN 00123900 A CN00123900 A CN 00123900A CN 00123900 A CN00123900 A CN 00123900A CN 1291776 A CN1291776 A CN 1291776A
- Authority
- CN
- China
- Prior art keywords
- lubricant
- powder material
- alloy powder
- alloyed powder
- weight
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims abstract description 229
- 239000000956 alloy Substances 0.000 title claims abstract description 156
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 154
- 239000000463 material Substances 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 title description 11
- 238000003860 storage Methods 0.000 title description 2
- 239000000314 lubricant Substances 0.000 claims abstract description 147
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 37
- 239000011261 inert gas Substances 0.000 claims description 18
- 230000008020 evaporation Effects 0.000 claims description 14
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 13
- 229930195729 fatty acid Natural products 0.000 claims description 13
- 239000000194 fatty acid Substances 0.000 claims description 13
- -1 fatty acid esters Chemical class 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000004438 BET method Methods 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical group C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 238000005275 alloying Methods 0.000 claims 2
- 239000003208 petroleum Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 44
- 230000006835 compression Effects 0.000 description 24
- 238000007906 compression Methods 0.000 description 24
- 229910052757 nitrogen Inorganic materials 0.000 description 22
- 229910052761 rare earth metal Inorganic materials 0.000 description 16
- 150000002910 rare earth metals Chemical class 0.000 description 14
- 238000000137 annealing Methods 0.000 description 13
- 238000005266 casting Methods 0.000 description 12
- 238000005336 cracking Methods 0.000 description 12
- 239000012895 dilution Substances 0.000 description 10
- 238000010790 dilution Methods 0.000 description 10
- 235000012054 meals Nutrition 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000005984 hydrogenation reaction Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 240000005373 Panax quinquefolius Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- NUKZAGXMHTUAFE-UHFFFAOYSA-N methyl hexanoate Chemical compound CCCCCC(=O)OC NUKZAGXMHTUAFE-UHFFFAOYSA-N 0.000 description 2
- UQDUPQYQJKYHQI-UHFFFAOYSA-N methyl laurate Chemical compound CCCCCCCCCCCC(=O)OC UQDUPQYQJKYHQI-UHFFFAOYSA-N 0.000 description 2
- JGHZJRVDZXSNKQ-UHFFFAOYSA-N methyl octanoate Chemical compound CCCCCCCC(=O)OC JGHZJRVDZXSNKQ-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003974 emollient agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
-
- 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
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
Claims (36)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP242556/1999 | 1999-08-30 | ||
JP24255699 | 1999-08-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1291776A true CN1291776A (zh) | 2001-04-18 |
CN1167086C CN1167086C (zh) | 2004-09-15 |
Family
ID=17090864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB001239007A Expired - Lifetime CN1167086C (zh) | 1999-08-30 | 2000-08-29 | R-Fe-B型烧结磁体的生产方法、该磁体的合金粉材料制法及保存法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US6344168B1 (zh) |
CN (1) | CN1167086C (zh) |
DE (2) | DE10042357B4 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102165540A (zh) * | 2008-05-09 | 2011-08-24 | Eto电磁有限责任公司 | 用于制造可磁化的金属成型体的方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6482353B1 (en) * | 1999-11-12 | 2002-11-19 | Sumitomo Special Metals Co., Ltd. | Method for manufacturing rare earth magnet |
US6478889B2 (en) * | 1999-12-21 | 2002-11-12 | Sumitomo Special Metals Co., Ltd. | Iron-base alloy permanent magnet powder and method for producing the same |
CN103093921B (zh) | 2013-01-29 | 2016-08-24 | 烟台首钢磁性材料股份有限公司 | 一种r-t-b-m-c系烧结磁铁及其制造方法及专用装置 |
CN103377820B (zh) | 2013-07-17 | 2015-11-25 | 烟台首钢磁性材料股份有限公司 | 一种r-t-b-m系烧结磁体及其制造方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3901742A (en) * | 1974-04-11 | 1975-08-26 | Gen Electric | Removal of lubricants and binders from sinterable powder components |
CA1316375C (en) * | 1982-08-21 | 1993-04-20 | Masato Sagawa | Magnetic materials and permanent magnets |
US4792368A (en) | 1982-08-21 | 1988-12-20 | Sumitomo Special Metals Co., Ltd. | Magnetic materials and permanent magnets |
JPH02161701A (ja) | 1989-11-02 | 1990-06-21 | Seiko Epson Corp | 永久磁石の製造方法 |
ATE167239T1 (de) * | 1992-02-15 | 1998-06-15 | Santoku Metal Ind | Legierungsblock für einen dauermagnet, anisotropes pulver für einen dauermagnet, verfahren zur herstellung eines solchen und dauermagneten |
JPH066728A (ja) | 1992-06-17 | 1994-01-14 | Casio Comput Co Ltd | 音声復調回路 |
JPH06108104A (ja) | 1992-09-30 | 1994-04-19 | Hitachi Metals Ltd | 希土類磁石の製造方法及びその装置 |
KR100187611B1 (ko) * | 1993-12-28 | 1999-06-01 | 오카모토 유지 | 희토류.철계 소결영구자석의 제조방법 및 성형재료 |
DE4434471C1 (de) * | 1994-09-27 | 1996-03-28 | Bosch Gmbh Robert | Verfahren zur Herstellung von Formkörpern aus Hartferriten |
US5666635A (en) | 1994-10-07 | 1997-09-09 | Sumitomo Special Metals Co., Ltd. | Fabrication methods for R-Fe-B permanent magnets |
JPH08191007A (ja) | 1995-01-12 | 1996-07-23 | Hitachi Metals Ltd | 希土類ボンド磁石及びその製造方法 |
EP0991086B1 (en) * | 1998-04-22 | 2009-07-15 | Hitachi Metals, Limited | METHOD FOR PRODUCING R-Fe-B PERMANENT MAGNET, LUBRICATING AGENT AND RELEASE AGENT FOR USE IN SHAPING THE SAME |
-
2000
- 2000-08-29 CN CNB001239007A patent/CN1167086C/zh not_active Expired - Lifetime
- 2000-08-29 DE DE10042357A patent/DE10042357B4/de not_active Expired - Lifetime
- 2000-08-29 US US09/649,572 patent/US6344168B1/en not_active Expired - Lifetime
- 2000-08-29 DE DE10066419.9A patent/DE10066419B8/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102165540A (zh) * | 2008-05-09 | 2011-08-24 | Eto电磁有限责任公司 | 用于制造可磁化的金属成型体的方法 |
Also Published As
Publication number | Publication date |
---|---|
DE10066419B8 (de) | 2015-09-17 |
CN1167086C (zh) | 2004-09-15 |
DE10042357A1 (de) | 2001-03-01 |
DE10042357B4 (de) | 2009-04-09 |
DE10066419B4 (de) | 2015-07-02 |
US6344168B1 (en) | 2002-02-05 |
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GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: SHINO MAGNITIC MATEERIAL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SUMITOMO SPECIAL METAL CO., LTD. |
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CP03 | Change of name, title or address |
Address after: Japan Osaka Patentee after: Neomax Co., Ltd. Address before: Japan Osaka Patentee before: Sumitomo Special Metals Co., Ltd. |
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Owner name: HITACHI METALS, LTD. Free format text: FORMER OWNER: SUMITOMO SPEC METALS Effective date: 20130514 |
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Application publication date: 20010418 Assignee: Antai Science and Technology Co., Ltd. Assignor: Hitachi Metals Co., Ltd. Contract record no.: 2013990000365 Denomination of invention: Method for producing R-Fe-B type sintered magnet, method for preparing alloy powder material of the magnet and method for preserving the same Granted publication date: 20040915 License type: Common License Record date: 20130701 Application publication date: 20010418 Assignee: Beijing Zhongke Sanhuan High-Tech Co., Ltd. Assignor: Hitachi Metals Co., Ltd. Contract record no.: 2013990000364 Denomination of invention: Method for producing R-Fe-B type sintered magnet, method for preparing alloy powder material of the magnet and method for preserving the same Granted publication date: 20040915 License type: Common License Record date: 20130701 Application publication date: 20010418 Assignee: Beijing Jingci Magnet Co., Ltd. Assignor: Hitachi Metals Co., Ltd. Contract record no.: 2013990000374 Denomination of invention: Method for producing R-Fe-B type sintered magnet, method for preparing alloy powder material of the magnet and method for preserving the same Granted publication date: 20040915 License type: Common License Record date: 20130703 |
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LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20010418 Assignee: Ningbo Yunsheng Co., Ltd. Assignor: Hitachi Metals Co., Ltd. Contract record no.: 2014990000031 Denomination of invention: Method for producing R-Fe-B type sintered magnet, method for preparing alloy powder material of the magnet and method for preserving the same Granted publication date: 20040915 License type: Common License Record date: 20140114 |
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LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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CP02 | Change in the address of a patent holder |
Address after: Japan Tokyo port harbor 2 chome No. 70 Patentee after: Hitachi Metals Co., Ltd. Address before: Tokyo, Japan Patentee before: Hitachi Metals Co., Ltd. |
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Application publication date: 20010418 Assignee: Hitachi metal ring Ci material (Nantong) Co. Ltd. Assignor: Hitachi Metals Contract record no.: 2017990000034 Denomination of invention: Method for producing R-Fe-B type sintered magnet, method for preparing alloy powder material of the magnet and method for preserving the same Granted publication date: 20040915 License type: Common License Record date: 20170209 |
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LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
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CI03 | Correction of invention patent |
Correction item: A transferee of the entry into force of the contract Correct: Hitachi metal ring magnets (Nantong) Co. Ltd. False: Hitachi metal ring Ci material (Nantong) Co. Ltd. Number: 11 Volume: 33 |
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CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20040915 |