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Abstract
In the hot forging of powder compacts into items of complicated shape, proper preform design is critical. In particular, in cases where items having sections of different lengths in the forging direction are to be produced in tools with undivided punches, the risk of cracking, overlapping or residual porosity in one or several of the sections is great. This paper presents results from hot-forming experiments with a variety of preform shapes and discusses possibilities of overcoming some typical preform design problems.
Notes
* Manuscript received 19 November 1973. Contribution to a Symposium on ‘PM Alloys and Properties’,held in Eastbourne on 19-21 November 1973.