High strength ductile hot rolled nitrogenized steel

Details High strength ductile hot rolled nitrogenized steel High strength ductile hot rolled nitrogenized steel

C - Chemistry, Metallurgy

21

D

148/33

C21D 8/00 (2006.01)

Patent

CA 1045007

HIGH STRENGTH DUCTILE HOT ROLLED NITROGENIZED STEEL Abstract of the Disclosure Aging hot rolled nitrogenized low carbon steel is treated to produce a material having a level of ductility during forming and a yield strength after forming which is comparable to the 80,000 psi yield strength hot rolled low alloy (HSLA) steels. The method includes the steps of (1) rapidly heating the steel within the alpha plus gamma region of the appropriate phase diagram for the steel and quenching; (2) tempering for example at about 400° F. for about 2 minutes and cooling: (3) deforming at least 2%, and (4) aging to develop the 80,000 psi yield strength.

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