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:

1973-05-01

Pagination or Media Count:

97.0

Abstract:

SHOP PRACTICE, VALUE ENGINEERINGISOTHERMAL 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 12 in. OD, had a plan area of 114 sq. in., weighed between 24 and 25 12 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 34 to 12 in. depending upon location. The thickness of the hub portion of the forging at the 13 12 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