抄録
The effect of chromium and molybdenum on the magnetic properties of high permeability iron-aluminum (13∼16%) alloys was studied. The magnetic properties were measured after heating at 1000°C in hydrogen atomosphere and water quenching from 600°C.
The results obtained are as follows:
(1) The addition of 2∼4% molybdenum improves greatly the magnetic properties of Fe-Al alloys. The aluminum content which is required to exhibit the most favorable magnetic properties proportionally decreases with the increasing molybdenum content. The values of μ0>6000, μm>100000 and Hc<0.03 Oe are obtained in a wide composition range from 14.3 to 15.8%Al and, in particular, the 3%Mo-14.6%Al-Fe alloy has the maximum values: μ0=8000, μm=120000, Hc=0.020 Oe.
(2) The addition of 1∼2% chromium slightly improves the magnetic properties, but 3∼4% chromium deteriorates.
(3) The saturation induction decreases with increasing chromium and molybdenum contents.
(4) Oil and air quenchings remarkably deteriorate the magnetic properties in all the specimens.
