REDUCTION AND CONSOLIDATION OF SUPERIOR QUALITY MOLYBDENUM ALLOYS
Abstract
The problem encountered in electron-beam melting of molybdenum, particularly that containing calcium and calcium oxide, has been largely overcome by improvements made both in the starting material and in the design of the electron-beam furnace and gun. Starting material was vacuum sintered to remove a large portion of the volatile material. The use of a remote gun, accelerating anode, and focusing coils permitted melting of the sintered material at reasonable rates. Molybdenum sheet rolled from a single crystal was found to have a recrystallization temperature between 1400 and 1600 F. The asrolled sheet exhibited low room temperature ductility. However, following a one hour anneal at 1400 F, the ductility was significantly improved. Molybdenum sheet was produced by powder metallurgy techniques using inert handling and vacuum sintering. Considerable ductility was obtained in the longitudinal and transverse directions from 0.048-in. sheet. Recrystallization temperature of this material is approximately 2200 F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 1961
- Accession Number
- AD0265364
Entities
People
- D.s. Fairgrieve
- Edmund Baroch
- James Wong
Organizations
- Bell Aircraft Corporation