Toothed wheel for use in automobiles and its manufacturing metho

Details Toothed wheel for use in automobiles and its manufacturing metho Toothed wheel for use in automobiles and its manufacturing metho

1993-06-29

1994-05-10

Wyszomierski, George

Metal treatment

Stock

Ferrous

420 84, 420 92, 420121, 74460, C22C 3816

Patent

active

053104323

ABSTRACT:
A toothed wheel for use in automobiles and a method for its manufacture are disclosed. The toothed gear is of a dish-shaped disk having a thickened peripheral edge portion in an outer and/or inner side of which gear teeth are shaped, at least the surface area of the gear teeth being of a martensite structure, the disk being made of a steel comprising a ferrite-cementite-graphite structure in which 50% or more of cementite has been changed to graphite, the steel composition of the disk consisting essentially of, by weight %:

REFERENCES:
patent: 4407681 (1983-10-01), Ina et al.
patent: 4431445 (1984-02-01), Furusawa et al.
patent: 5139583 (1992-08-01), Kawabata et al.

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