High remanence Fe-Mo-Ni alloys for magnetically actuated devices

Details High remanence Fe-Mo-Ni alloys for magnetically actuated devices High remanence Fe-Mo-Ni alloys for magnetically actuated devices

1980-08-18

1982-07-20

Sheehan, John P.

Metal treatment

Compositions

Heat treating

148 3157, 148101, 148120, C04B 3500

Patent

active

043404340

ABSTRACT:
Magnetically actuated devices such as, e.g., switches and synchronizers typically comprise a magnetically semihard component having a square B--H hysteresis loop and high remanent induction. Among alloys having such properties are Co--Fe--V, Co--Fe--Nb, and Co--Fe--Ni--Al--Ti alloys which, however, contain undesirably large amounts of cobalt.
According to the invention, devices are equipped with a magnetically semihard, high-remanence Fe--Mo--Ni alloy which comprises Mo in a preferred amount in the range of 2-26 weight percent and Ni in a preferred amount in the range of 0.5-15 weight percent.
Magnets made from alloys of the invention may be shaped, e.g., by cold drawing, rolling, bending, or flattening and may be used in devices such as, e.g., electrical contact switches, hysteresis motors, and other magnetically actuated devices.
Preparation of alloys of the invention may be by a treatment of annealing and aging or deformation and aging.

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