Application of a Forming Limit Concept to the Design of Powder Preforms for Forging

[+] Author and Article Information
C. L. Downey

Drexel University, Philadelphia, Pa.; Cincinnati, Inc., Cincinnati, Ohio

H. A. Kuhn

Drexel University, Philadelphia, Pa.; Department of Metallurgical and Materials Engineering, University of Pittsburgh, Pittsburgh, Pa.

J. Eng. Mater. Technol 97(2), 121-125 (Apr 01, 1975) (5 pages) doi:10.1115/1.3443271 History: Received June 20, 1974; Online August 17, 2010


The soundness of the metallurgical structure and the associated strength of a forged powder preform material increase with increasing lateral flow during the forging process. Unconstrained lateral flow, however, enhances the possibility of fracture during deformation. In this paper, a preform design technique is presented that provides the preform shape and dimensions for forging a part to full density with a sound metallurgical structure but without fracture. The basis of the approach is a forming limit concept developed previously for cold forming processes. Application of the technique is demonstrated through design of the preform for forging a pulley blank consisting of a flange, rim and hub.

Copyright © 1975 by ASME
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