Formable high strength low alloy steel

Details Formable high strength low alloy steel Formable high strength low alloy steel

1977-04-07

1978-12-12

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

148 12F, C21D 700

Patent

active

041294610

ABSTRACT:
The formability of high strength low alloy steel is improved while strength is substantially maintained or improved by first heating the steel to at least the lowermost eutectoid temperature of the steel to dissolve a substantial proportion of the carbides and nitrides (if nitrides are present) into the austenite and air cooling to substantially lower the yield strength and improve formability without significantly reducing tensile strength. The steel is then deformed to an amount equivalent to at least 2% strain on the tensile stress-strain diagram whereby the yield strength is substantially recovered. Preferably, the steel is then heat aged whereby the yield strength and tensile strength are each further raised.

REFERENCES:
patent: 3330705 (1967-07-01), Madrzyk et al.
patent: 3928086 (1975-12-01), Bailey
patent: 3930907 (1976-01-01), Bailey

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