Fe-BASE AMORPHOUS ALLOY THIN STRIP OF EXCELLENT SOFT MAGNETIC CHARACTERISTIC, IRON CORE PRODUCED THEREFROM AND MASTER ALLOY FOR QUENCH SOLIDIFICATION THIN STRIP PRODUCTION FOR USE THEREIN

摘要

An Fe-base amorphous alloy thin strip of excellent soft magnetic characteristics; an iron core produced therefrom; and a master alloy for thin strip production through quench solidification for use therein. Molten metal is injected through an injection nozzle having a slotted opening onto a moving coolant substrate and quench solidified into a metal thin strip. The Fe-base amorphous alloy thin strip is characterized in that an extremely thin oxide layer of 5 to 20 nm thickness is disposed on a thin strip surface on at least one side of an amorphous parent phase containing 0.2 to 12 atomic% of P.