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
      Fabrication Metallurgy
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE