| abstract |
An iron alloy strip having a gage of 0.1 to 5 mm and anmagnetic field strength variation within the strip of 0 ton10 Hz, made of an iron alloy consisting essentially of, in %nby weight, 0.0001-0.02% of C, 0.0001-5% of Si, 0.001-0.2% ofnMn, 0.0001-0.05% of P, 0.0001-0.05% of S, 0.0001-5% of A1.n0.001-0.1% of 0. 0.0001-0.03% of N, 0-10% of Co, 0-10% ofnCr, 0.01-5% in total of Ti, Zr, Nb, Mo, V, Ni, W, Ta and/ornB, and the balance of Fe, and having a saturation magneticnflux density of 1.7-2.3 Tesla, a maximum relativenpermeability of 1,200-22,000 and a coercive force of 20-380nA/m is suited for use as yokes in voice coil motor magneticncircuits. The iron alloy strip is highly resistant toncorrosion and eliminates a need for a corrosion resistantncoating. |