LOW ALLOY STEELS WITH SUPERIOR CORROSION RESISTANCE FOR OIL COUNTRY TUBULAR GOODS

摘要

The present application describes a steel composition that provides enhanced corrosion resistance. This steel composition includes one of vanadium in an amount of 1 wt% to 9 wt%, titanium in an amount of about 1 wt% to 9 wt%, and a combination of vanadium and titanium in an amount of 1 wt% to about 9 wt%. In addition, the steel composition includes carbon in an amount of 0.03 wt% to about 0.45 wt%, manganese in an amount up to 2 wt% and silicon in an amount up to 0.45 wt%. In one embodiment, the steel composition includes a microstructure of one of the following: ferrite, martensite, tempered martensite, dual phase ferrite and martensite, and dual phase ferrite and tempered martensite. Further, the present application describes a method for processing the steel composition and use of equipment such as oil country tubular goods, fabricated with the steel composition.