Howard Ferguson and Steven K. Smith
This paper describes the manufacture of a seventeen-tooth spur gear by Precision Cold Forging (PCF) of a P/M preform to over 98% of theoretical density. This gear replaces a cut gear used in a 24hp garden tractor transmission. The method described is a bulk deformation process requiring close control of densification and deformation of the sintered preform within the fracture limit of the material.
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