DEVELOPMENT OF IMPROVED METHODS FOR COLD EXTRUSION OF TITANIUM
Abstract
Cold extrusion techniques evolved from this study were applied to the production of aircraft flareless-tube nuts of AMS4902 Ti (commercially pure) with savings of about 58% in materials, 20% in fabrication, and 48.5% in total costs over those produced from solid bar stock. Precision hollow shapes of unalloyed Ti and Ti-3Al-2.5V alloy were backward extruded at 50% reduction at practical working pressures, with fluoride-phosphate coatings and properly designed punches. The optimum punch tip was a segment of a circle with a half angle of 70 degrees for backward extrusion at 340,000 psi as compared with 400,000 psi for a flat punch. Extrudability potentials were determined at 80, 500, and 1000 F for Ti-13V11Cr-3Al, Ti-3Al-2.5V, Ti-6Al-4V, Ti-16V-2.5Al, and Ti-8Al-1Mo-1V alloys. Forward-extr,000 psi were required to cold extrude the all beta Ti-13V-11Cr-3Al alloy into solid round bars.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1961
- Accession Number
- AD0251977
Entities
People
- A. M. Sabroff
- P. D. Frost
- R. J. Fiorentino
Organizations
- Battelle Memorial Institute