Method of heat treatments of amorphous alloy ribbons

Details Method of heat treatments of amorphous alloy ribbons Method of heat treatments of amorphous alloy ribbons

1980-03-26

1981-09-08

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148120, 148100, H01F 100

Patent

active

042882605

ABSTRACT:
A method of heat treatments of amorphous alloy ribbons comprises the sequential steps of; grinding amorphous alloy ribbon continuously fed at a predetermined speed (V) selectively varied in the range of 1 cm/sec.ltoreq.V.ltoreq.50 cm/sec, to uniformly finish the ribbon, and successively, heat-treating the ribbon with its surface contacting a stationary or rotating heating body having a surface temperature (T) defined in the range of (T.sub.cry -200.degree. C.).ltoreq.V.ltoreq.(T.sub.cry +50.degree. C.), where T.sub.cry is a crystallization point temperature of the alloy, to uniformly enhance the magnetic properties of the ribbon, and to remove the specific curlings inherently caused by so-called splat cooling manufacturing method, without causing any developments of brittleness of the ribbon mentioned above.

REFERENCES:
patent: 4052201 (1977-10-01), Polk et al.
patent: 4053333 (1977-10-01), Egami et al.
patent: 4116728 (1978-09-01), Becker et al.
"Physical Properties of Ti.sub.50 Be.sub.40 Zr.sub.10 Glass", Tanner et al., Metallurgica, vol. 11, pp. 783-789, 1977.
"Structure Relation and Hardness of Metallic Glasses", Chen et al., Rapidly Quenched Metals, and International Conf. 1976.
"Mechanical Properties of an Amorphous Cu-Zr Alloy", Vitek et al., Metallurgical Transactions, vol. 6A, Jul. 1975, pp. 1472-1473.

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