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The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Development Of Improved Liner For Extrusion Billet Containers

Report Number: ML TDR 64-194
Author(s): Spachner, Sheldon A.
Corporate Author: IIT Research Institute
Corporate Report Number: IITRI-B244-18
Laboratory: Air Force Materials Laboratory
Date of Publication: 5/1/1964
Pages: 156
Contract: AF 33(657)-8784
Project: 7-945
AD Number: AD0604172

Abstract:
A program was carried out to secure an improvement of extrusion container liner performance and life for metal extrusion effected in the 2000 - 3400F temperature range. Liner-support tooling was developed to permit use of superalloy, ceramic-coated tool steel, and solid ceramics as liner materials capable of withstanding 180,000 psi stem pressure. The tooling utilized liner-sleeve assemblies which were not shrink-fitted in the container and could quickly be interchanged. Prototype extrusion liners of Rene 41 and Udimet 700 superalloys, and a variety of both Rokide-process and plasma-arc-ceramic coated liners, were produced and evaluated. Compositions of fibermetal reinforced ceramic materials specially designed for liner application, were produced and evaluated by extrusionscreening test. A Rokide-process stabilized zirconia ceramic-coated liner withstood TZM alloy extrusion at 3450F. Plasma-arc coatings of stabilized zirconia, and gradated alumina-nickel, and cast Udimet 700 alloy, proved satisfactory for steel extrusion at 2000F. Fiber metal reinforced ceramic mixtures of 72A12O3-28Mo and 59.5A12O3-40.5Mo proved capable of withstanding billet temperatures of 3450F.

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