Powdered Metal Processes - Powder Forged Metal

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Cold pressed and sintered components have the great advantage of being close to final shape (near-net shape), but are not fully dense. Where densification is essential to provide adequate mechanical properties, the technique of hot forging, or powder forging, can be used.

The Process

In this process, a powder blank is pressed to a simple shape halfway between that of a forging billet and the required finished part.

This compact, referred to as a preform, is sintered and then hot forged to finished size and shape in a closed die.

The amount of deformation involved is sufficient to give a final density very closely approaching that of the solid metal, and consequently, the mechanical properties are comparable with those of material forged from wrought bar.