Title:
PROCESS FOR PRODUCING, THROUGH STRIP CASTING, RAW ALLOY FOR NANOCOMPOSITE TYPE PERMANENT MAGNET
Document Type and Number:
WIPO Patent Application WO/2002/030595
Kind Code:
A1
Abstract:
A process for efficiently producing at low cost a raw alloy for nanocomposite magnets which is mainly amorphous. The process comprises preparing a molten alloy represented by Fe¿100-x-y-z?R¿x?Q¿y?M¿z? (wherein R is at least one of praseodymium, neodymium, dysprosium, and terbium; Q is at least one of boron and carbon; M is at least one of cobalt, aluminum, silicon, titanium, vanadium, chromium, manganese, nickel, copper, gallium, zirconium, niobium, molybdenum, silver, platinum, gold, and lead; 1 ≤ x < 6 at.%; 15 ≤ y ≤ 30 at.%; and 0 ≤ z ≤ 7 at.%) and feeding this molten alloy to a cooling roll rotating at a peripheral speed of 3 to 20 m/sec, excluding 20 m/sec, so that the feed rate per unit contact width is in the range of 0.2 to 5.2 kg/min/cm to thereby rapidly cool the alloy by strip casting. Thus, an alloy at least 60 vol.% of which is amorphous can be produced.
Inventors:
MURAKAMI RYO (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
Application Number:
PCT/JP2001/008317
Publication Date:
April 18, 2002
Filing Date:
September 25, 2001
Export Citation:
Assignee:
SANTOKU CORP (JP)
SUMITOMO SPEC METALS (JP)
MURAKAMI RYO (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
SUMITOMO SPEC METALS (JP)
MURAKAMI RYO (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
International Classes:
B22D11/06; C22C33/00; C22C38/00; C22C38/02; C22C38/10; C22C38/18; C22C38/30; C22C45/02; G01N33/20; H01F1/057; H01F1/058; (IPC1-7): B22D11/06; B22F1/00; B22F9/04; C21D6/00; C22C33/02; C22C38/00; C22C45/02; G01N33/20; H01F1/04
Foreign References:
| JPH02179803A | 1990-07-12 | |||
| JPH02247305A | 1990-10-03 | |||
| JPH02247306A | 1990-10-03 | |||
| JPH02247307A | 1990-10-03 | |||
| JPH02247308A | 1990-10-03 | |||
| JPH02247309A | 1990-10-03 | |||
| JPH02247310A | 1990-10-03 | |||
| JPH08229641A | 1996-09-10 | |||
| JPH02298003A | 1990-12-10 | |||
| JPH07166206A | 1995-06-27 | |||
| JPH08335506A | 1996-12-17 | |||
| JPH10265915A | 1998-10-06 | |||
| EP1104932A2 | 2001-06-06 | |||
| JP2001226753A | 2001-08-21 | |||
| JP2001244107A | 2001-09-07 | |||
| JP2001254159A | 2001-09-18 | |||
| JPS5594151A | 1980-07-17 |
Other References:
See also references of EP 1338359A4
Attorney, Agent or Firm:
Okuda, Seiji (Kataoka Bldg. 3-6 Uchiawajimachi 1-chome
Chuo-ku Osaka-shi, Osaka, JP)
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