COOLING ROLL, PRODUCTION METHOD FOR MAGNET MATERIAL, THIN-BAND-LIKE MAGNET MATERIAL, MAGNET POWDER AND BOND MAGNET

Title:

COOLING ROLL, PRODUCTION METHOD FOR MAGNET MATERIAL, THIN-BAND-LIKE MAGNET MATERIAL, MAGNET POWDER AND BOND MAGNET

Document Type and Number:

WIPO Patent Application WO/2001/032334

Kind Code:

A1

Abstract:

A cooling roll (5) for producing magnet materials, comprising a roll base material (51) and a surface layer (52) covering the outer periphery of the material, wherein the roll base material (51) is preferably formed of a metal material of a high heat conductivity, and the surface layer (52) is formed of a material lower in heat conductivity than the roll base material (51) and preferably formed of ceramics. The surface layer (52) satisfies the relation, 1.01 $m(F) T¿max?/T¿min? $m(F) 3, where T¿max? is the maximum thickness of the surface layer (52), and T¿min? the minimum thickness. The peripheral surface (511) of the roll base material (51) has a surface roughness Ra of 0.03 to 8 $g(m)m.

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Inventors:

ARAI AKIRA (JP)
KATO HIROSHI (JP)

Application Number:

PCT/JP2000/007797

Publication Date:

May 10, 2001

Filing Date:

November 06, 2000

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)
ARAI AKIRA (JP)
KATO HIROSHI (JP)

International Classes:

B22D11/06; H01F1/055; H01F1/057; (IPC1-7): B22D11/06; H01F1/06

Foreign References:

JPH05135919A	1993-06-01
JPH0562813A	1993-03-12
JPH0455042A	1992-02-21
JPH11277188A	1999-10-12
JPH0428458A	1992-01-31
EP0024506A1	1981-03-11
JP2000077219A	2000-03-14
US5665177A	1997-09-09

Other References: