METHOD FOR PRODUCING AMORPHOUS RIBON FOR NANO- CRYSTALLIZED MATERIAL AND METHOD FOR MANUFACTURING NANO-CRYSTALLIZED SOFT MAGNETIC MATERIAL USING THIS RIBON

摘要

PROBLEM TO BE SOLVED: To provide a production method of an Fe base amorphous ribon with which a nano-crystallized material excellent in magnetic characteristic can be obtained, and a manufacturing method of a nano-crystallized soft magnetic material using this amorphous ribon. SOLUTION: This amorphous ribon for nano-crystallized material is produced by pouring molten metal composed of <=10 mol% B and <=15 mol% one or more elements in 4A, 5A and 6A groups in the periodic table of elements and the balance substantially Fe into a moving cooling body while introducing gas having >=32 J/mol.K specific heat at constant pressure at 30 deg.C toward this molten metal. The nano-crystallized soft magnetic material having <=100 nm average crystallized grain diameter can be obtained by applying the heat treatment to this ribon at not lower than the crystallized temperature.