Steel torsional element and method for making

Details Steel torsional element and method for making Steel torsional element and method for making

1978-06-01

1979-11-06

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 315, 148 39, C21D 148

Patent

active

041735013

ABSTRACT:
A steel torsional element includes a first or shaft portion for transmitting torque and a second portion, such as a gear, for transferring torque to another machine element. The entire torsional element is carburized and quenched to a first depth to provide wear-resistance and resistance to surface compressive fatigue in the second portion for the transferring of torque to another machine element. The quenching operation also provides a strong but ductile core for both portions of the steel torsional element. The shaft portion is then induction hardened to a second and greater depth to increase the torsional strength thereof.

REFERENCES:
patent: 1043416 (1912-11-01), Giolitti
patent: 1072661 (1913-09-01), Shore
patent: 3141801 (1964-07-01), Prutton
patent: 3357869 (1967-12-01), Shepeljakovsky
patent: 3377214 (1968-04-01), Woodbridge et al.
patent: 3885996 (1975-05-01), Abe
patent: 3891474 (1975-06-01), Gurange
patent: 3946817 (1976-03-01), Prince
patent: 4038109 (1977-07-01), Pfliegeo et al.
"A Dictionary of Metallurgy", A. D. Merriman, MacDonald and Evans Ltd., London 1958, pp. 30, 119 and 269.

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