Abstract
Since their discovery of high magnetic permeability alloy “Nimalloy” in the Ni–Mn system, the present authors have made a study of the effect of the addition of iron on its properties, and obtained the highest initial permeability of 39200 and the highest maximum permeability of 213000. According to the results of the present experiment, the initial and maximum permeabilities of Ni–Mn alloys are generally increased by small vanadium additions. An alloy containing 19.92% manganese and 2.16% vanadium, which was cooled at a rate of 240°C/hr from 900°C and reheated at 420°C for 95 hrs, shows the initial permeability of 22000, the maximum permeability of 169500, the magnetic hysteresis loss of 4.47 erg/cm3/cycle and the coercive force of 0.0095 Oe for the maximum induction of 2000 G, and the specific electrical resistivity of 55.3 μΩ-cm at 20°C.
