| 摘要 |
PROBLEM TO BE SOLVED: To reduce a fluctuation of a magnetic property in a longitudinal direction of a thin strip after a crystallization heat treatment by incorporating specified amounts of Ti, V, Zr, Nb, Mo and Hf, Ta and/or W, Si and/or B, Cr and/or Ga into an Fe base magnetic alloy. SOLUTION: The compsn. of an Fe base magnetic alloy thin strip is composed of, by atom, 1 to 10% of at least one kind selected from Ti, V, Zr, Nb, Mo, Hf, Ta and W, 2 to 30% of at least one kind selected from Si and B, <=0.5% of at least one kind selected from Cr and Ga, and the balance Fe with inevitable impurities. The elements in the primary group facilitate amorphous formation and refine the crystal grains after heat treatment. Si and B facilitate amorphous formation and improve its soft magnetic properties after heat treatment. Cr and Ga can suppress the crystallization of a surface on the side of the contact face with a roll in the case an amorphous alloy thin strip for producing a nanocrystal alloy magnetic core is produced. |
