Hot plastic working method

Details Hot plastic working method Hot plastic working method

1995-10-24

1997-09-30

Larson, Lowell A.

Metal deforming

By extruding through orifice

With metal-deforming other than by extrusion

72709, 72377, 72356, B21C 2300

Patent

active

056716311

ABSTRACT:
To provide a hot working method which can reduce working resistance during the early stage of hot plastic working, particularly extrusion and forging using a die.
A hot plastic working method characterized by comprising the step of plastically working, using a die, a material having a structure of not more than 50 .mu.m in average grain diameter with dispersed spherical grains ranging in size from 10 to 200 nm, the working material having a recess formed on a surface thereof in its site facing a closed space formed by abutting the working material against the die surface at the time of plastic working.

REFERENCES:
patent: 1599572 (1926-09-01), Lusher
patent: 5490408 (1996-02-01), Ando et al.
"Advances in Superplasticity and in Superplastic Materials", Oleg D. Sherby ISIJ International, vol. 29, No. 8, 1989, pp. 698-716.
European Search Report dated Mar. 18, 1996 (2 pages).
Communication dated Apr. 12, 1996 (1 page).
Information List (1 page).

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