Metal treatment – Stock – Magnetic
Patent
1996-06-20
1999-04-06
Sheehan, John
Metal treatment
Stock
Magnetic
340572, H01F 1153
Patent
active
058912703
ABSTRACT:
A mechanically resonant marker comprises a strip of magnetic glassy metal alloy that has been annealed in a furnace for a predetermined time at a plurality of temperatures. A first of the temperatures is high enough to relieve quenched-in and post fabrication stresses. The second of the temperatures is near the Curie temperature of the strip. Annealing is carried out in the presence of an external magnetic field applied perpendicular to the strip's length and in the plane of the strip. The second of the temperatures is applied sequentially of the first temperature and is operative to induce magnetic anisotropy along the direction of the magnetic field. Annealing is continuous and the annealing time is determined by the velocity of the strip passing through the annealing furnace.
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Buff Ernest D.
Sheehan John
Squires John A.
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