| 摘要 |
An alpha-beta titanium alloy preform is processed in the beta phase field, by heat treating or beta forging. The processed preform is thereafter heated into the alpha-beta phase field, and a preselected portion is forged, leaving a nonselected portion that is not forged in the alpha-beta phase field. The resulting article has a beta-processed structure in the nonselected portion, and a beta-processed plus alpha-beta forged structure in the preselected portion. In one application, the preform has the shape of a disk useful in the manufacture of an aircraft gas turbine engine. Depending upon specific requirements, either the center or the rim of the disk may be the selected portion.
|
