RIBBON OF Fe-BASED AMORPHOUS ALLOY AND IRON-CORE MANUFACTURED THEREWITH

Japanese Patent JP3634286

B2

PROBLEM TO BE SOLVED: To provide a ribbon of a Fe-based amorphous alloy, which can manufacture an iron-core having superior soft magnetic properties, even when temperature distribution generates in each part of the iron-core during annealing.
SOLUTION: The ribbon of the Fe-based amorphous alloy superior in the soft magnetic characteristics for alternating current, is composed of main elements of Fe, Si, B, C, and P, and unavoidable impurities, and has a composition of 78≤Fe≤86, 2≤Si<4, 5<B≤16, 0.02≤C≤4, and 0.2≤P≤12, by atom.%. The above soft magnetic characteristics of the ribbon comprise B80 of 1.35T or more and a standard deviation of B80 of less than 0.1, in the range of annealing temperature of which the ΔT is at least 80°C, when the maximum value of annealing temperature is Tmax, the minimum value is Tmin, and ΔT=Tmax-Tmin. The iron loss is 0.12 W/kg or less in the range of the annealing temperature of which the ΔT is at least 60°C. In addition, the ribbon has a superior embrittlement resistance of which the bending fracture stress εf is 0.01.

Hiroaki Sakamoto
Yuichi Sato

JP2001123359A

March 30, 2005

April 20, 2001

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Nippon Steel Corporation

C22C45/02; C22C38/02; H01F1/153; H01F1/16; H01F27/24; (IPC1-7): C22C45/02; C22C38/02; H01F1/153; H01F1/16; H01F27/24

JP11071658A
JP3268305A
JP63186560A
JP61246318A
JP56105453A
JP8193252A
JP57185957A

Takashi Ishida
Jun Tsuruta
Hiroshi Kamematsu
Masaya Nishiyama

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