優れた磁気特性を有するＦｅ系金属板

Japanese Patent JP6481288

B2

PROBLEM TO BE SOLVED: To provide an Fe-based metal plate having enhanced electric resistance by diffusing dissimilar metals from a surface thereof, in which an iron loss is decreased and excellent magnetic flux density is achieved while maintaining a high concentration of the dissimilar metals in a surface layer portion.SOLUTION: The Fe-based metal plate comprises Fe or an Fe-alloy having a composition that can generate α-γ transformation, and includes a surface layer region with enriched dissimilar metal elements other than Fe and an inner region inside the surface layer region and having no enriched dissimilar metal elements. The depth of the surface layer region with the enriched dissimilar metal elements is specified to 1 μm or more and 200 μm or less; and the total enriched amount of the dissimilar metal elements is specified to 1 mass% or more and 6 mass% or less. An absolute value of a residual stress σ in a plate plane direction is specified to 50 MPa or less; and an integration degree of {200} planes of an α-phase in the surface layer region is preferably controlled to 30% or more and 99% or less. More preferably, an absolute value of a difference between a saturation magnetostriction λ1 and a saturation magnetostriction λ2 is specified to 5×10or less, where λ1 is measured in a thickness range from the surface of the Fe-based metal plate to a depth of (1/4)t, where t represents the thickness of the plate, and λ2 is measured in a thickness range from (1/4)t to (1/2)t.

Toru Inaguma
Miho Tomita
Hiroaki Sakamoto

JP2014169892A

March 13, 2019

August 22, 2014

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Nippon Steel & Sumitomo Metal Corporation

C22C38/00; C22C38/60; C23C10/28; H01F1/147

JP2012214888A
JP2012237051A
JP2013095955A

WO2011052654A1
WO2012147922A1

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Fukuchi Ritsuo
Nakamura Asayuki
Nagasaka Tomoyasu

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