VACUUM ARC MELTING OF TUNGSTEN + 0.6 COLUMBIUM

Technical Report · Mon Apr 01 04:00:00 EST 1963

OSTI ID:4714112

Reimann, G A

Vacuum arc melting techniques were developed to produce sound 3 1/2-in. and 4-in. dia. ingots of.W base alloys. The effect of melting rate on ingot characteristics was determined, and the effects of C, O/sub 2/, Zr, and Ti on melting characteristics, ingot structure, extrudability, recrystallization, and high-temperature tensile properties of the W + 0.6 Nb alloy were studied also. Refinement of ingot structure was produced by 0.06 and 0.12% Zr additions and by increasing the melting rate. Coarsening of ingot structure was produced by 0.04% Ti and 500 to 1000 ppm O/sub 2/ addltions. W + 0.6 Nb ingots containing more than 50 ppm C could not be extruded, and correlation between extrudability and C content below 50 ppm was not found. Adding 0.12% Zr to the W + 0.6 Nb alloy significantly improved the 3000 un. Concent 85% F tensile properties. (auth)

• Research Organization: Westinghouse Electric Corp., Blairsville, Penna.
• NSA Number: NSA-17-022127
• OSTI ID: 4714112
• Report Number(s): ASD-TDR-63-296
• Country of Publication: United States
• Language: English

Related Subjects

CARBON
CONFIGURATION
ELECTRIC ARCS
EXTRUSION
HIGH TEMPERATURE
MECHANICAL PROPERTIES
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM ALLOYS
OXYGEN
PRODUCTION
RECRYSTALLIZATION
REFINING
TENSILE PROPERTIES
TITANIUM
TUNGSTEN ALLOYS
VACUUM
ZIRCONIUM
ZIRCONIUM ALLOYS