Method for producing a beta-processed alpha-beta...

Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal

Reexamination Certificate

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C148S421000

Reexamination Certificate

active

07449075

ABSTRACT:
A titanium-alloy article is produced by providing a workpiece of an alpha-beta titanium alloy having a beta-transus temperature, and thereafter mechanically working the workpiece at a mechanical-working temperature above the beta-transus temperature. The mechanically worked workpiece is solution heat treated at a solution-heat-treatment temperature of from about 175° F. below the beta-transus temperature to about 25° F. below the beta-transus temperature, quenched, overage heat treated at an overage-heat-treatment temperature of from about 400° F. below the beta-transus temperature to about 275° F. below the beta-transus temperature, and cooled from the overage-heat-treatment temperature.

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