Accession Number : AD0764266
Title : Development of Isothermal Forging of Titanium Centrifugal Compressor Impeller.
Descriptive Note : Final technical rept. 7 Dec 71-31 May 73,
Corporate Author : IIT RESEARCH INST CHICAGO ILL
Personal Author(s) : Watmough,T.
Report Date : MAY 1973
Pagination or Media Count : 97
Abstract : SHOP PRACTICE, VALUE ENGINEERING*ISOTHERMAL FORGINGThe technology of isothermal forging of titanium has been successfully extended to the production of impeller forgings. A four-part nickel-base superalloy die set weighing approximately 2000 lb was made and used to produce ten Ti-6Al-4V alloy forgings. The ten forgings were 13 1/2 in. OD, had a plan area of 114 sq. in., weighed between 24 and 25 1/2 lb, and had 36 blades radially emanating from the hub. The blades were 0.160 in. thick at the thinnest portion and had depths ranging from 3/4 to 1/2 in. depending upon location. The thickness of the hub portion of the forging at the 13 1/2 in. OD was typically 0.210 in. Preform temperatures were typically 1750F and die temperatures 1600F. Press forging loads were usually 1000 tons, equivalent to 17 kpsi forging pressure. (Modified author abstract)
Descriptors : (*TITANIUM ALLOYS, *FORGING), (*IMPELLERS, MANUFACTURING), FORGE PRESSES, DIES, PRODUCTION CONTROL, HOT PRESSING, MECHANICAL PROPERTIES, MACHINE SHOP PRACTICE, VALUE ENGINEERING
Subject Categories : Metallurgy and Metallography
Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE