Camshaft and method for producing the same

Details Camshaft and method for producing the same Camshaft and method for producing the same

1991-02-05

1991-11-12

Kyle, Deborah L.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 14, 419 15, 419 17, 419 18, 419 28, 419 29, 419 30, 419 54, 419 55, 75239, 75240, 75241, B22F 700

Patent

active

050646087

ABSTRACT:
A method for producing a camshaft having a tubular steel shaft and a sintered cam piece joined to the shaft. The sintered cam piece has iron tetroxide film at its surface. The camshaft is produced by assembling a powder compact to the steel shaft to provide a camshaft assembly, sintering the assembly to provide an integral assembly, correcting bending to the assembly, annealing the assembly, grinding the cam piece and effecting vaporization treatment to the assembly at a temperature lower than the annealing temperature.

REFERENCES:
patent: 4388114 (1983-06-01), Suganuma et al.
patent: 4518563 (1985-05-01), Suganuma et al.
patent: 4861372 (1989-08-01), Shimomura
patent: 4904302 (1990-03-01), Shimomura
patent: 4927707 (1990-05-01), Matsubara
"Heat Treatment Guidebook", May 15, 1983, pp. 150, 160.
"Heat Treatment Guidebook", Apr. 1, 1984, pp. 148-151.
"Heat Treatment to Steel", Oct. 1, 1969, p. 691.

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