Austempered ductile iron gear and method of making it

Details Austempered ductile iron gear and method of making it Austempered ductile iron gear and method of making it

1990-10-26

1992-01-21

Dean, R.

Metal treatment

Compositions

Heat treating

148 12R, 148321, 148141, C21D 500

Patent

active

050825070

ABSTRACT:
An austempered ductile iron differential gear and method of manufacture. The gear is cast to near net shape in a vertical injection, flaskless moulding machine using delayed inmould inoculation to ensure greater homogeneity of the alloy melt. The gear casting is allowed to cool, then austenized at a temperature of 1628.degree. F. for a period of approximately 11/2 hours, and subsequently austempered in a quench bed at a temperature of approximately 526.degree. F. for a period of approximately four hours.

REFERENCES:
patent: 4222793 (1980-09-01), Grindahl
patent: 4541878 (1985-09-01), Muhlberger et al.

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