Iron-based amorphous alloy with excellent magnetic properties and excellent fracture resistance and manufacturing method

摘要

1. TECHNICAL FIELD OF THE INVENTION;An iron-based amorphous alloy having excellent magnetic properties and excellent fracture resistance, and a manufacturing method thereof.;2. The technical problem to be solved by the invention;When the amount of Mn added is 0.2at% or more and less than 0.5at%, iron loss can be improved without lowering the magnetic flux density, and the rapid solidification treatment of the molten metal is carried out in an atmosphere of CO ₂ containing a small amount of H ₂ . It also improves the surface smoothness of the thin ribbon and also reforms the oxidation state.;3. Summary of Solution to Invention;Fe _x B _y Si _z Mn _a where 75 ≤ _X ≤ 82 at%, 7 ≤ _Y ≤ 15 at%, 7 ≤ _Z ≤ 0.5 at%, wherein the surface smoothness is less than 0.8 μm as the centerline average smoothness R _a Amorphous alloys and methods of manufacturing the same.;4. Important uses of the invention;Iron core material for transformers and other amorphous alloys.