PROCESS DEVELOPMENT OF LARGE, CLOSE TOLERANCE FORGINGS OF NICKEL BASE SUPERALLOYS.

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Abstract:

The development of a forging practice for close tolerance structural forgings of Rene 41 and Udimet 700 was conducted and is described. Two shapes were experimentally produced in either alloy. One shape had a plan view of 46 square inches, weighed 25 pounds and was hammer forged. The second had a plan view of 133 square inches, weighed 65 pounds and was forged on an hydraulic press. To attain the thin webs and low draft angles 2-3 degrees, heavier forging pressures and insulated forgings were employed. On the hydraulic press forging of Rene 41, a web thickness of 14 in. and rail height of 2 in. was obtained. Less shape sophistication was obtained for Udimet 700. It was demonstrated that more refined shapes could be forged if still heavier forging pressures were feasible. Die breakage presents the most significant limit to potential shape sophistication. Mechanical properties were evaluated and generally satisfy the initial specifications issued for disk forgings in the same alloys. Author

Author(s):
Couts, Wilfred H. ; Sjoblad, Roy E.
Author Organization(s):
WYMAN-GORDON CO WORCESTER MA
Descriptive Note:
Final rept. 1 Jul 65-31 Dec 67,
Pagination:
0173

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RD-67-149, AFML-TR-67-347
Contract/Grant Number(s):
AF 33(615)-2743
Monitor Series:
TR-67-347
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*NICKEL ALLOYS, *FORGING, TOLERANCES(MECHANICS), CHROMIUM ALLOYS, COBALT ALLOYS, MOLYBDENUM ALLOYS, IRON ALLOYS, TITANIUM ALLOYS, ALUMINUM ALLOYS, STRUCTURAL COMPONENTS, DIES, MECHANICAL PROPERTIES
Field(s)/Group(s):
Fabrication Metallurgy
Keyword(s):
NICKEL ALLOY RENE 41, NICKEL ALLOY UDIMET 700, SUPER ALLOYS
Report Date:
1967 Nov 01