VACUUM ARC MELTING OF TUNGSTEN 0.6 COLUMBIUM
Abstract
Vacuum arc melting techniques were developed to produce sound 3 1/2- and 4-in. diameter ingots of tungaten base alloys. The effect of melting rate on ingot characteristics was determined and the effects of C, O, Zr and Ti on melting characteristics, ingot structure, extrudability, recrystallization, and high temperature tensile properties of the W+0.6Cb 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 additions. W+0.6Cb ingots containing more than 50 ppm C could not be extruded, and correlation between extrudability vs. C content below 50 ppm was not found. Adding 0.12% Zr to the W0.6Cb alloy significantly improved the 3000 F tensile properties.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0403394
Entities
People
- George A. Reimann
Organizations
- Westinghouse Electric Corporation