Actions for Cold-drawing sheet molybdenum at room temperature

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Cold-drawing sheet molybdenum at room temperature

Author
Shepherd, L. W
Published
United States : [publisher not identified], 1975.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1975.
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
When sheet molybdenum is cold-drawn and annealed, the microstructure recrystallizes, and may cause the metal to become brittle, with loss of ductility and strength. Ten to twenty percent recrystallization can occur to destroy optimum drawing quality of the metal. A recrystallization of 4 to 5 percent is ideal. It is shown that special tooling and controlled annealing can hold recrystallization to optimum levels. Special tooling includes an automatic cycling press that closely controls the rate of draw and gives maximum pressure. A draw sleeve of high carbon steel is used. The draw sleeve can be highly polished to minimize friction and provides an intensifying effect of the ram force over the entire part. Four draw steps are used, with each step followed by an annealing at 9250C for 20 minutes. Results of recrystallization analysis show that the ideal five percent recrystallization is achieved with this process. (auth)
Report Numbers
GEPP-172
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: E(29-2)-656
NSA number: NSA-33-009793
OSTI Identifier 4131524
Research organization: General Electric Co., St. Petersburg, Fla. (USA). Neutron Devices Dept.
View MARC record | catkey: 45373471