PILOT STUDY OF PREFORM DESIGN FOR SINTER FORGING
1974; Maney Publishing; Volume: 17; Issue: 33 Linguagem: Inglês
10.1179/pom.1974.17.33.010
ISSN1743-2901
AutoresTrent Griffiths, William K. Jones, M. Lundregan, M. B. Bassett,
Tópico(s)Aluminum Alloys Composites Properties
ResumoAbstractAn important difference between sinter forging and conventional forging is that of consolidation of the PM preform. It therefore follows that sinter forging would seem to be a hot-compaction process with some bulk metal plastic flow. The permitted amount of plastic flow is considerably less for a PM preform than for a preform produced from wrought material of equivalent composition, since PM preforms exhibit poor ductility and are therefore more prone to cracking. The purpose of this study is to produce some guidelines to assist in designing preforms for sinter forging and to attempt to minimize the ‘trial and error’ approach. This has been undertaken by the production and study of a component suitable for PM forging, which at present is produced by conventional forging.The lateral flow of metal was observed and investigations undertaken as to how density variations across the preform might assist the consolidation process. An iron powder containing 1% graphite and 1% zinc stearate was used in the...
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