Process for producing amorphous alloy forming material
AssigneesTsuyoshi Masumoto, Kabushikikaisha Yoshida
InventorsTsuyoshi Masumoto, Akihisa Inoue, Junichi Nagahora, Kazuhiko Kita
Life of this patent
Estimating the term…
Abstract
A process for producing an amorphous alloy forming material having at least 50% by volume of an amorphous phase which comprises a first-stage treatment in which an amorphous alloy is maintained in a temperature range below the glass transition temperature, a second-stage treatment in which the alloy is maintained in a temperature range in the supercooled liquid region for a prescribed period of time, and quenching of the alloy thus treated. The process improves the embrittlement peculiar to amorphous alloys subjected to thermal hysteresis for a long time and provides amorphous alloys having excellent strength, ductility and thermal plastic workability.
Claims6
A process for producing an amorphous alloy product comprising the steps of subjecting an amorphous alloy material having a supercooled liquid region to a first stage treatment in which said amorphous alloy material is maintained in a temperature range of from the amorphous alloy material's glass transition temperature minus 100.degree.K to the amorphous alloy materials's glass transition temperature for a period of time of from the minimum time necessary to result in embrittlement in the amorphous alloy material due to structural relaxation therein to 3000 seconds;
- subsequently subjecting the amorphous alloy material to a second-stage treatment in which said amorphous alloy material is maintained in a temperature range of from higher than the amorphous alloy material's glass transition temperature to the amorphous alloy material's crystallization temperature for 4 to 40 seconds;
- and quenching said amorphous alloy material to produce an amorphous alloy product having at least 50% by volume of an amorphous phase.
Dependencies are inferred from the claim text.