Carbon steel simple low alloy for the manufacture of the conduits for the exploration and production of oil and / or natural gas with corrosion resistance is optimized.Process for the manufacture of seamless tubes and seamless tubes processed

摘要

"Simple low alloy carbon steel for the manufacture of the conduits for the exploration and production of oil and / or natural gas with corrosion resistance optimizedProcess for the manufacture of seamless tubes and seamless tubes processed."Carbon steel low alloy for the manufacture of seamless pipes with corrosion resistance is optimized, particularly the" corrosion "means sweet rich in CO2.To be used in the exploration and production of oil and / or natural gas.The steel contains 1,54,0 weight percent Cr, 1.5 - 4.0% by weight of Cr, 0.06 0.10% by weight of C, 0.3 to 0.8% by weight of Mn, up to 0.005% by weight of s up to 0.015% by weight of P, 0,20 - 0.35% by weight of 0.25 - 0.35% by weight of Mo, 0.06 - 0.9% by weight of V, approximately 0.22% by weight of Cu approximately 0.001% by weight of Nb, approximately 28% by weight of you,Up to 25 ppm of the total and the balance consisting of Fe and impurities inevitable. The procedure for the manufacture of seamless tubes.Includes steps of preparing a melt lead, followed by a stage of secondary metallurgy with deep desulfurization, addition of ferroalloys and chrome.Followed by modification and flotation of inclusions to meet the formulation specified: cast continuous laminate, optionally followed by a standard austenizado, hardened and tempered.