Method of producing a tantalum stock material of high ductility

Details Method of producing a tantalum stock material of high ductility Method of producing a tantalum stock material of high ductility

1988-03-23

1989-07-04

Roy, Upendra

Metal treatment

Compositions

Heat treating

75 84, 148 115F, 148133, 420427, C21D 100

Patent

active

048447463

ABSTRACT:
A method is described for the production of a ductile tantalum stock material for high-speed deformation use. A bar-shaped body is made from directly reduced tantalum powder of a given purity and is remelted repeatedly as a consumable electrode in an electron beam furnace. The obtained ingot is shaped into a slab which, after being machined to a smooth surface, is further worked to produce the stock material. At least one heat treatment under vacuum is included in the process of making the stock material.

REFERENCES:
patent: 2825641 (1958-03-01), Beall et al.
patent: 3285716 (1966-11-01), Contant
patent: 4722756 (1988-02-01), Hard
Mordike, B. L. , Z. Metallkde 55 (1964) 304.
Zedler et al., Z. Metallkde, 56 (1965) 316.
Dinter, R. J., Z. Metallkde, 58 (1967) 70.
Reed et al., Rept. Ornl-4952, May 1974, p. 129.

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