| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high hardness ferrous soft magnetic alloy by preparing a ferrous soft magnetic alloy which has a composition represented by specific formula and containing Fe, Co, B, Zr, Cu, etc., and is which the angle of diffraction in the X-ray diffraction pattern is specified. SOLUTION: An amorphous alloy, having a composition represented by formula (Fe1-a Coa )b Bx Ty T'z [where T' means one or more elements among Ti, Zr, Hf, V, Nb, Ta, Mo, and W and occludes either or both of Zr and Hf, T' means one or more elements among Cu, Ag, Au, Ni, Pd, and Pt, and the symbols (a), (b), (x), (y), and (z) stand for <=0.05, 75-92 atomic %, 0.5-16 atomic %, 4-10 atomic %, and 0.2-4.5 atomic %, respectively], is cooled rapidly from molten metal state. Subsequently, heat treatment is carried out at 500-700 deg.C to precipitate fine crystalline grains, by which a ferrous soft magnetic alloy, in which the diffraction peal of body-centered cubic crystal Fe exists on the range of 40-50 deg. diffraction angle 3θ in the X-ray diffraction pattern using CuKα ray, is prepared. By this method, the high hardness ferrous soft magnetic alloy, combining high saturation magnetic flux density with high magnetic permeability and having high thermal; stability, can be obtained. |
