SOFT MAGNETIC AMORPHOUS ALLOY RIBBON, METHOD FOR PRODUCING SAME, AND MAGNETIC CORE USING SAME

Title:

SOFT MAGNETIC AMORPHOUS ALLOY RIBBON, METHOD FOR PRODUCING SAME, AND MAGNETIC CORE USING SAME

Document Type and Number:

WIPO Patent Application WO/2011/030907

Kind Code:

A1

Abstract:

Disclosed is a soft magnetic amorphous alloy ribbon that is produced by means of a rapid solidification method, and the surface of which has rows in the widthwise direction of depressions formed by laser light that are at predetermined intervals in the lengthwise direction. A doughnut-shaped protrusion is formed at the perimeter of each depression. The doughnut-shaped protrusions have a smooth surface wherein there is effectively no scattered material of alloy melted by the radiation of the laser light, have a height (t2) of no more than 2 μm, and have a ratio t1/T of depression depth (t1) to ribbon thickness (T) in the range of 0.025-0.18. Therefore, the soft magnetic amorphous alloy ribbon has low core loss and low apparent power.

Inventors:

YOSHIZAWA YOSHIHITO (JP)
ITO NAOKI (JP)
KAZUI SHINICHI (JP)
SASAKI MAKOTO (JP)

Application Number:

PCT/JP2010/065866

Publication Date:

March 17, 2011

Filing Date:

September 14, 2010

Export Citation:

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Assignee:

HITACHI METALS LTD (JP)
YOSHIZAWA YOSHIHITO (JP)
ITO NAOKI (JP)
KAZUI SHINICHI (JP)
SASAKI MAKOTO (JP)

International Classes:

H01F1/153; C21D8/12; C22C45/02; H01F1/16; H01F41/02

Foreign References:

JPS6129103A	1986-02-10
JPS57161031A	1982-10-04
JPH0786788A	1995-03-31
JP2001181804A	2001-07-03
JP2007002334A	2007-01-11
JP2006045662A	2006-02-16
JPS6249964B2	1987-10-22
JPH0332886B2	1991-05-15
JPH0332888B2	1991-05-15
JPH0253935B2	1990-11-20

Other References: