Studies on Cold-Workable Permanent Magnet Alloys (1st Report)

Abstract

The properties of Co-Fe-V permanent magnet alloys which can be cold-worked severely have been investigated. When they are cold-worked, the saturation induction value increases and a magnetic anisotropy appears so that the value of energy product increases considerably (See Figs. 3 and 4 and Table 1). During aging after cold-working, the saturation induction value and the hardness increase according to a certain change in α-phase, and at somewhat higher temperatures the coercive force increases owing to the dispersion of γ-phase (See Figs. 5 and 7). The best magnetic properties, Br=10000 gauss, Hc=420 Oe, (BH)_max=2.8^×106, have been obtained in the composition of Co=52.5%, Fe=34%, V=13.5% by severe cold-working and aging at 600°.