| 摘要 |
PURPOSE:To produce a soft-magnetic alloy having high saturation magnetic flux density and superior soft-magnetic properties by preparing an alloy consisting of specific percentages of Fe, Cu, Co, Mn, Si, etc., and containing fine crystalline grains under specific conditions. CONSTITUTION:An amorphous alloy foil of an alloy represented by (Fe1-a-b-cCuaCob M'c)100-dYd is prepared by liquesol quenching, etc., and formed into a rapidly solidified powder by an atomizing method, etc., and then subjected to heat treatment at a temp. in the range between the temp. lower than the crystallization temp. of this alloy by about 50 deg.C and the temp. higher than the crystallization temp. of this alloy by about 120 deg.C for 1min-10hr, by which the soft-magnetic alloy having fine crystalline grains in which area ratio is regulated to >=30% and the grains of 50-300Angstrom grain size comprise >=80% is prepared. Further, in the above formula, M' means >=at least one or more kinds selected from group IVa, Va, and VIa elements of the periodic table or Mn, Ni, and Al, Y means >=at least one ore more elements selected from Si, B, and P, and the symbols (a), (b), (c), and (d) stand for, by atom, 0.005-0.05%, 0.01-0.7%, 0-0.1%, and 15-28%, respectively. By this method, an Fe-base magnetic alloy having high saturation magnetic flux density in a high frequency region and superior soft-magnetic properties can be obtained. |
