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Tuesday, 12 November 2013

Hot-Working Processes - Forging

Points : Forging, Definition Definition Forging metals by hand at least six thousands years ago but there is evidence that pre-historic man was using this type of process to fashion copper some two thousand years earlier. Hand forging is still used to a limited extent by the smith but most modem forging is power-assisted.
Wrought iron was the traditional material of the smith but many ferrous and non-ferrous alloys are now shaped by forging processes and wrought iron has long become obsolete as an engineering material. During forging the coarse ‘as-cast’ structure is broken down and is replaced, as recrystallisation proceeds, by one which is of relatively fine grain. At ‘he same time impurities are redistributed in a more or less fibrous form. therefore it is more satisfactory, all other things being equal, to forge a component than to cast it to shape.

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