High saturation ternary cobalt-iron basalt alloys

A study was made of the manner in which ternary additions to cobalt iron alloys impart ductility to the brittle binary alloys. Results show that tantalum or niobium are more effective than the conventional vanadium addition, and additions as low as 0.2 wt.% impart sufficient ductility to permit cold rolling. The magnetic characteristics of alloys made with Ta and Nb are reported. An increase of 4% in the saturation flux compared with the 49CoFe2V Permendur alloy is obtained. Improved coercive force and permeability, compared with conventional cobalt iron alloys, were also found.