Accession Number:

AD0258212

Title:

TUNGSTEN EXTRUSION PROGRAM. A STATE-OF-THE-ART SURVEY

Descriptive Note:

Interim reot. no. 1, 2 Dec 1960-2 Mar 1961

Corporate Author:

WAH CHANG CORP ALBANY OR

Personal Author(s):

Report Date:

1961-03-02

Pagination or Media Count:

101.0

Abstract:

The state- of-the-art on the extrusion of W and its alloys is reviewed. A resume of physical and mechanical property data and present industrial capabilities for ingot production and extrusion practice is presented. Ingot and mill product preparation techniques are discussed. Both powder metallurgy and arc consolidation may be utilized to prepare small ingots. However, the consumable electrode arc-melting process is the only method being used to produce W ingot stock of sufficient size to warrant consideration. Limited mechanical property data is presented on W and several W base alloys. Recrystallization behavior and factors affecting ductile-to-brittle transition temperature are also discussed. It is reported that conventional extrusion experience on W and its alloys has been limited primarily to round bar at reduction ratios of less than 101. The major problem areas which must be overcome before a successful W tee extrusion can be obtained are the limitations in die materials, lubrication, and insufficient billet heating capability.

Descriptors:

• *EXTRUSION
• *AVIATION SAFETY
• *TUNGSTEN
• MECHANICAL PROPERTIES
• PRODUCTION
• PREPARATION
• PHYSICAL PROPERTIES
• DIES
• OXIDATION
• AIRFRAMES
• INDUCTION HEATING
• ELECTRIC ARCS
• POWDER METALS
• GRAIN STRUCTURES(METALLURGY)
• LUBRICANTS
• POWDER METALLURGY
• MELTING
• ELECTRON BEAMS
• IMPURITIES
• PROCESSING
• WIRE
• TENSILE PROPERTIES

Subject Categories:

• Military Aircraft Operations
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE