Method of manufacturing cams by powder metallurgy

Details Method of manufacturing cams by powder metallurgy Method of manufacturing cams by powder metallurgy

1988-08-17

1989-07-25

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 26, 419 29, 419 58, 419 49, 419 53, 419 54, B22F 324

Patent

active

048511897

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.

REFERENCES:
patent: 4251273 (1981-02-01), Smith et al.
patent: 4373970 (1983-02-01), Scorey et al.
patent: 4421717 (1983-12-01), Rao
patent: 4595556 (1986-06-01), Umeha et al.

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