Cold-formable Cr-Co-Fe alloys for use in the telephone receiver
- 1 March 1979
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 15 (2) , 950-957
- https://doi.org/10.1109/tmag.1979.1060295
Abstract
Six alloys based on the Cr-Co-Fe system have been developed which can be cold-drawn into cups, heat treated to form magnets with energy products in the range 1.5 to 1.8 million gauss-oersteds. Such magnets have been fabricated into ring-armature-type receivers which can be used in the telephone handset. The alloys are based on the composition 28% Cr-15% Co-Fe with additions of Zr, Al, Nb, Ti, V, and Mo. The two most promising alloys consist of 1 Al-& Zr and 1 Nb-& Ti-& Zr. The former alloy can be solution treated at 900&C; the latter requires 1050&C.Keywords
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