Copper brazed torque converter pump housing made from formable h

Details Copper brazed torque converter pump housing made from formable h Copper brazed torque converter pump housing made from formable h

1991-07-12

1992-06-16

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Producing or treating layered, bonded, welded, or...

148624, 148622, C21D 800

Patent

active

051221993

ABSTRACT:
A method is provided for thermally treating a high strength, microalloyed steel so as to first induce sufficient ductility (and corresponding low strength) in the microalloyed steel to readily enable the room temperature forming and/or machining of the steel. This is accomplished by appropriately heating to a solutionizing temperature and then cooling from this temperature at an extraordinarily slow rate so as to induce coarse precipitation of any strengthening particles and to thereby minimize the strengthening contributions associated with precipitates and ferrite grain size. The formed low strength components are then thermally treated again (such as during a copper brazing cycle) so as to induce high strength and relatively lower ductility in the microalloyed steel.

REFERENCES:
patent: 4594113 (1986-06-01), Elsner et al.
patent: 4784922 (1988-11-01), Yoshimura
patent: 4917738 (1990-04-01), Takano et al.
Schwartz, Mel. M., "Brazing" published by ASM International, Metals Park, Ohio 44073 (1987).
Pickering, F. B., "High-Strength, Low-Alloy Steels-A Decade of Progress", and Gladman, T. et al., "Structure-Property Relationships in High-Strength Microalloyed Steels"; both published in the Proceedings of an International Symposium on High-Strength, Low-Alloy Steels, Microalloying 75, 39th Floor, 270 Park Avenue, New York, NY 10017 (1975).

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