Friction-actuated extrusion

Details Friction-actuated extrusion Friction-actuated extrusion

1982-07-19

1984-09-04

Crane, Daniel C.

Metal deforming

By extruding through orifice

By rotating impeller means

722531, 72467, B21C 2300, B21C 2502

Patent

active

044689454

ABSTRACT:
In continuous friction-actuated extrusion, especially Conform extrusion of copper, at least part of the tooling is made from aged nickel-chromium base alloy (which is preferably cold-worked before aging to give a yield strength of at least 1500 MN/m.sup.2 at 20.degree. C.) and which is capable of sustaining an adherent oxide film. The preferred alloy is "Inconel Alloy 718". Despite lower hardness, the tooling has better service life than conventional special-steel tooling.

REFERENCES:
patent: 3832167 (1974-08-01), Shaw et al.
patent: 4085605 (1978-04-01), Burstrom et al.
Metals Handbook, Heat Treating, Cleaning and Finishing, ASM Handbook Commitee, American Society for Metals, Metals Park, Ohio, 8th Edition, vol. 2, 1964, pp. 257-263, 297-300.
Sahm, P. R. et al., High Temperature Materials In Gas Turbines, Elsevier Scientific Publishing Co., N.Y., 1974, pp. 49-59.

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