TUNGSTEN EXTRUSION PROGRAM. A STATE-OF-THE-ART SURVEY
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 10:1. 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 02, 1961
- Accession Number
- AD0258212