MAGNETIC MEMBER AND PROCESS FOR PRODUCING MAGNETIC MEMBER

Title:

MAGNETIC MEMBER AND PROCESS FOR PRODUCING MAGNETIC MEMBER

Document Type and Number:

WIPO Patent Application WO/2013/073640

Kind Code:

A1

Abstract:

Provided are a magnetic member which is excellent in terms of magnetic properties and productivity and a process for producing the magnetic member. A powder (20) of a soft-magnetic metal and a multiphase powder (30) composed of multiphase particles in which a phase of a hydride of a rare-earth element and a phase of a substance comprising Fe are present are fed to a molding die (100A), and both powders (10, 20) are simultaneously pressed and compacted to form a powder compact (10A). The powder compact (10A) is subjected to a heat treatment, thereby separating the hydrogen from the multiphase particles to yield a recombination alloy in which the rare-earth element has combined with the substance comprising Fe. Through these steps, a magnetic member (1A) comprising a soft-magnetic region (2A) and a magnet region (3A) constituted of the recombination alloy (alloy comprising the rare-earth element and Fe) is formed. Since both powders (10, 20) are simultaneously molded, the number of steps is small and the productivity is excellent. The magnetic member (1A) has no fine gap that may occur in the case where a soft-magnetic member and a magnet are used as separate members, and is hence inhibited from suffering the decrease in magnetic property caused by the gap. Thus, the magnetic member (1A) has excellent magnetic properties.

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Inventors:

MAEDA TORU (JP)

Application Number:

PCT/JP2012/079706

Publication Date:

May 23, 2013

Filing Date:

November 15, 2012

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

H01F1/08; B22F3/00; B22F3/24; B22F7/06; H01F1/057; H01F1/22; H01F41/02; H02K15/03

Foreign References:

JP2007236113A	2007-09-13
JP2003017309A	2003-01-17
JP2011137218A	2011-07-14
JP2007129154A	2007-05-24
JP2007134353A	2007-05-31
JP2012241280A	2012-12-10

Attorney, Agent or Firm:

YAMANO, HIROSHI (JP)
Hiroshi Yamano (JP)

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