Method for superplastic warm-die and pack forging of high-streng

Details Method for superplastic warm-die and pack forging of high-streng Method for superplastic warm-die and pack forging of high-streng

1986-12-05

1989-09-19

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 115F, 148 115N, 148 115P, 420902, C21D 804

Patent

active

048678074

ABSTRACT:
A high-strength low-ductility material is formed by a method which comprises treating a bulk or powder of the material thereby converting coarse grains thereof into hyperfine grains capable of manifesting superplasticity when the strain rate is higher than 5.times.10.sup.-3 s.sup.-1, enclosing the treated material with a metallic insulating member, heating the material to a temperature for manifestation of superplasticity, and forging the material by the use of a die in a state heated to a temperature beyond which the die yields to heat.

REFERENCES:
patent: 4600446 (1986-07-01), Torisaka et al.

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