Form-Rolling Close Tolerance Shapes of Superalloys.
Abstract
The program established a process for Form-Rolling net structural shapes, to close tolerance, of superalloys. Material/shape combinations of four alloys (Inconel 718, Rene 41, Hastelloy X, and Udimet 700) and three configurations ('E' shape, 'T' shape, and 'L' shape) were investigated. Investigations were concerned with establishing suitable starting stock size, tooling and process parameters for preshape configurations, from centerless ground round bars, and for final Form-Rolling operations. The formation of the three ribs of the E- section (two outside even ribs and one shorter center rib) and the establishment of the unsymmetrical L-section (a long thin leg and a shorter thick leg) were achieved through a combination of Form Rooling and stationary die swaging. The T-section preform was established through stationary die swaging for a round edge flat bar. The starting stock size, dependent upon tooling design and resulting material flow, was established as the process evolved. 'E' shaped sections of Inco 718 alloy are being fabricated into engine rings which can withstand temperatures above 750F to economically replace extrusions. 'T' shaped sections of Rene 41 and Hastelloy X are being fabricated into lengths for application as strengtheners and joiners in areas where temperatures exceed 800F. 'L' shaped sections of Inconel 718 alloy and Hastelloy X are being fabricated into lengths for applications as joiners and strengtheners to replace extrusions and machined parts. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1969
- Accession Number
- AD0860456
Entities
People
- Gregory N. Wassil