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Abstract
The science, technology, and economics of component production by the forging of powder metallurgy preforms are reviewed. First, the general concept of this fabrication technology is introduced and briefly compared with related powder metallurgical techniques like powder rolling or super alloy and tool-steel production from powders. This is followed by an in-depth treatment of the individual steps in the fabrication sequence of powder forging (i.e. powder production methods and selection criteria, powder compaction, sintering and preheating, and forging), and of the properties of powder forged materials. One section is devoted to the theory of flow of porous materials and the consequences of this theory for powder forging. In setting out economic considerations, a cost analysis of parts production is made and powder forging is compared with possible competitive processes.