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US 8,935,852 B2Granted
Prealloyed copper powder forged connecting rod
AssigneeGKN Sinter Metals, LLC
InventorsIan W. Donaldson, Timothy E. Geiman, Ray K. Williams, Brandon A. Nichols
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Abstract
A process for manufacturing connecting rods is provided which comprises the steps of compacting, sintering, and powder forging a powder metal comprising a carbon source and a prealloyed powder consisting essentially of iron and copper. The connecting rods made from this process have sufficient hardness and strength to be used in an engine and do not require any additional quenching or tempering.
Claims8
A process for manufacturing connecting rods comprising:
- compacting a powder metal into a green compact, the powder metal comprising a carbon source and a prealloyed powder consisting essentially of iron and 1 to 5 percent copper by weight;
- sintering the green compact for a length of time to form a sintered part;
- and
- powder forging the sintered part, the powder forging inducing plastic flow in the sintered part to form a connecting rod such that the resultant sintered and forged connecting rod is substantially free of martensite and does not require further heat treatment after forging and before use in an engine.
1 more element
Dependencies are inferred from the claim text.