Method of manufacturing Fe-base soft magnetic alloy
AssigneeAlps Electric Co., Ltd.
InventorsKiyonori Suzuki, Akihiro Makino, Tsuyoshi Masumoto, Akihisa Inoue
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Abstract
The present invention relates to a method of stably manufacturing a Fe-base soft magnetic alloy having steps of subjecting an amorphous alloy mainly composed of Fe to heat treatment in which the amorphous alloy is heated to 400.degree. to 750.degree. C. at a heating rate of 1.0.degree. C./minute or higher so that at least 50% or more of the structure of the amorphous alloy is made of fine crystalline grains formed into a body-centered cubic structure and having an average grain size of crystal of 30 nm or smaller as to have a high magnetic permeability and saturation magnetic flux density.
Claims27
A method of manufacturing a Fe-base soft magnetic alloy comprising a step of:
- forming an amorphous alloy ribbon mainly composed of Fe;
- subjecting the amorphous alloy ribbon to heat treatment in which said amorphous alloy ribbon is heated at a heating rate of 10.degree. C./minute or higher so that at least 50% or more of the structure of said amorphous alloy ribbon is made of fine crystalline grains formed into a body-centered cubic structure and having an average grain size of crystal of 30 nm or smaller.
Dependencies are inferred from the claim text.