DEVELOPMENT OF DIES FOR EXTRUSION OF COMPLEX SHAPES OF STEEL AND REFRACTORY ALLOYS. Interim Progress Report, January 1-March 31, 1963

Technical Report · Wed May 01 04:00:00 EDT 1963

OSTI ID:4687103

Hunt, J G; Klein, J L; White, A M; Jenkins, R G

Investigations were made on methods of fabricating and evaluating dies suitable for the high-temperature extrusion of steel and refractory metals of complex shapes. Successful methods of producing tungsten fibers for reinforced dies were developed. A die support system based on the concept of hydrostatic support for the die casing was developed and shown to be successful in preventing the cracking of brittle die nibs during extrusion. Studies were also made on fabrication of intermetallic dies by both hot pressing and melting and forging; obtaining intermetallic dies from outside sources; finish grinding of round intermetallic dies; establishment of feasibility of hot pressing Tee dies; developing methods of making tungsten reinforcing fibers by rolling and swaging; development of a method for supporting dies so that the pressure from the extrusion billet results in a compressive force on the die nib to prevent cracking; establishing the vaiue of refractory metals as promising substrates for coated dies; modification of a high temperature furnace to provide a 2 to 3 second loading time for TZM billets. It has been established that the indenter test in its present state of development is not a satisfactory means of screening die materials. (P.C.H.)

• Research Organization: Nuclear Metals, Inc., West Concord, Mass.
• NSA Number: NSA-17-023905
• OSTI ID: 4687103
• Report Number(s): NMI-9700.9; ASD-TDR-7-946(III)
• Country of Publication: United States
• Language: English

Related Subjects

ALLOYS
CASTING
CRACKS
DIES
EXTRUSION
FABRICATION
FIBERS
FORGING
HIGH TEMPERATURE
HOT WORKING
MECHANICAL STRUCTURES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
PRESSURE
REPORT
ROLLING
STEELS
TUNGSTEN