Method and apparatus for equal channel angular extrusion of...

Details Method and apparatus for equal channel angular extrusion of... Method and apparatus for equal channel angular extrusion of...

2007-03-20

2007-03-20

Tolan, Ed (Department: 3725)

Metal deforming

By extruding through orifice

C072S257000, C072S041000

Reexamination Certificate

active

10866548

ABSTRACT:
The invention comprises a method and apparatus for equal channel angular extrusion (ECAE) of flat billets to control material structure and properties. The improvements of the method include the special systems of billet orientations, billet lubrication, billet ejection from dies, and a press/die control system those eliminate surface cracks, flashes and billet reshaping or deburring between passes. Therefore, multi-pass ECAE becomes a cost-effective industrial operation and may be applied to large billets.

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patent: 6723187 (2004-04-01), Segal et al.
patent: 6883359 (2005-04-01), Hartwig, Jr.

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