To provide a soft magnetic alloy which is hardly changed chemically even if being exposed to severe environments such as the insides of the living body and oral cavity and excellent in corrosion resistance, particularly a soft magnetic alloy exhibiting most excellent corrosion resistance by making a structure in the combination with an Fe-Pt permanent magnet alloy.
This alloy is a high corrosion resistance soft magnetic alloy contg., by atomic ratio, 17 to 37% Pt as the main component, contg. 0.001 to 35% in total one or more kinds among Cr, Co and Ni respectively by ≤25% and B, C, Al, Si, Ti, Mn, Cu, Ge, Y, Pd, Ta, Nb, Mo, W, Ir, Ag and Au respectively by ≤10% as assistant components, and the balance Fe with a small amt. of impurities, and by executing working and heat treatment, its coercive force Hc is made to be ≤10 Oe, its saturation magnetic flux density Bs is made to be ≥10 kG, and excellent soft magnetic properties can be obtd.
OKUNO OSAMU
KIMURA KOHEI
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