A possibility for developing high strength soft magnetic materials in FeCo-X alloys

The effects of the combination of cold rolling and heat treatment upon mechanical and magnetic properties have been examined for the FeCo-based alloys with additive elements such as carbon, vanadium, chromium, molybdenum, tungsten, tantalum, niobium, and nickel. It is revealed that whenever alloys including such elements are subjected to cold rolling the yield strength can be raised to between 100 and 200 kg mm^–2, and that cold rolling is effective in both strengthening and in improving soft magnetic properties, even when cold rolling is followed by annealing or ageing. This suggests that these alloys can be used for lessening the weight of parts which are used as soft magnetic materials, although their properties will depend on the combinations of cold rolling and heat treatments, and/or on the added elements and the control of their amount.