Method of forming a partially carburized starter output shaft

Details Method of forming a partially carburized starter output shaft Method of forming a partially carburized starter output shaft

1989-07-20

1992-02-04

Dean, R.

Metal treatment

Compositions

Heat treating

148 165, 148319, 74 7E, C21D 822, C21D 930

Patent

active

050857134

ABSTRACT:
A rotary output shaft for a vehicle starter motor having a planet gear speed reducing device is formed by forging a steel blank to form a product having a shape similar to the rotary output shaft but having slightly larger outer dimensions, by subjecting a planet gear carrier portion 7c of the forged entire product to copper plating to prevent carburization, by subjecting the product to a carburizing treatment, and by finishing the locally carburized portion of the product.

REFERENCES:
patent: 2520334 (1950-08-01), Peters
patent: 3154970 (1964-11-01), Gebhardt et al.
patent: 4173501 (1979-11-01), Hildebrandt et al.
patent: 4590811 (1986-07-01), Kasubuchi
patent: 4604907 (1986-08-01), Morishita et al.
patent: 4776224 (1988-10-01), Maezawa et al.

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