Method of manufacturing cams by powder metallurgy
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United States of America Patent
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Jul 25, 1989
Grant Date -
N/A
app pub date -
Aug 17, 1988
filing date -
Aug 19, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method of manufacturing cams for camsshafts by powder metallurgy, wherein the formed cams have constant properties over the volume thereof and are well polishable, includes molding into a cam blank a powder mixture made up of iron powder alloyed with carbide-forming elements of the fifth and sixth secondary groups of the periodic table, and graphite powder in a quantity necessary for carbide formation; sintering the blank at a temperature of at most 50 K above a solidus temperature of the blank; and compacting the blank by hot-isostatic compression at a temperature below the solidus temperature to at least 99% of a theoretical density.
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