METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND COIL COMPONENT

Title:

METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND COIL COMPONENT

Document Type and Number:

WIPO Patent Application WO/2014/112483

Kind Code:

A1

Abstract:

A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step for mixing the soft magnetic material powder and a binder; a second step for pressure-molding the mixture obtained in the first step; and a third step for heat-treating the compact obtained in the second step, the soft magnetic material powder being an Fe-Cr-Al alloy powder containing Fe, Cr, and Al, an oxide layer being formed on the surface of the soft magnetic material powder by means of the heat treatment, and the oxide having a ratio of Al to the sum of Fe, Cr, and Al that is higher than the alloy phase on the interior in terms of mass ratio.

Inventors:

NISHIO YOSHIMASA (JP)
NOGUCHI SHIN (JP)
NISHIMURA KAZUNORI (JP)
KATOH TETSUROH (JP)
MIHARA TOSHIO (JP)

Application Number:

PCT/JP2014/050467

Publication Date:

July 24, 2014

Filing Date:

January 14, 2014

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI METALS LTD (JP)

International Classes:

H01F41/02; B22F1/16; C22C33/02; C22C38/00; H01F1/22; H01F27/255

Foreign References:

JP2005220438A	2005-08-18
JP2008240041A	2008-10-09
JP2006233268A	2006-09-07
JP2007162103A	2007-06-28
JP2000030925A	2000-01-28
JPH0297646A	1990-04-10
JP2009158802A	2009-07-16
JP2005220438A	2005-08-18

Other References: