| 摘要 |
PROBLEM TO BE SOLVED: To stably obtain a wide amorphous alloy foil excellent in magnetic properties, thermal stability, workability, etc., having superior manufacturability, and useful as iron core for power transformer. SOLUTION: This foil is an amorphous alloy foil having a composition represented essentially by chemical formula Fea Bb Sic C, where (a), (b), (c), and (d) satisfy, by atomic %, 78.5<=a<=81, 9.5<=b<=13, 8<=c<=12.5, and 0.4<=d<=1.5, respectively. This foil is cast by means of single-roll liquisol quenching in an atmosphere containing >=40vol.% carbon dioxide gas, and further, the as-cast width is regulated to >=70mm and also the value of center line average height Ra of the contact surface with a roll is regulated to <=0.7μm. |
