Tube for conducting corrosion resistant high strength and thick wall and method for producing the same

摘要

Abstract invention patent: "tube for driving with a high strength and corrosion resistant thick wall and method for producing the same. It is provided a tube for driving and a driving tube suitable for corrosion resistant high strength and thick wall which has a thickness of tube of 20 mm and a tensile strength of 560 MPa and a method for producing the tube for driving.In this tube for driving, the part of the base material comprises: specific quantities of C, Si, Mn, P, s, Al, Nb, CA, N and one or more kinds of Cu, Ni, Cr, Mo, V and Ti as (a) component (s) optional (is); Fe and unavoidable impurities, and like the rest of it.In this tube for driving: the microstructure in the direction of the thickness of the tube comprises 90% of bainite in the region from a depth of 2 mm from the inner surface to a depth of 2 mm from the outer surface; the hardness in regions except for the part of secretes Central government is 220 hv10 or less and the hardness in part of central segregation is 250 hv10 or less in terms of di...Stribuiu00e7u00e3o of hardness in the direction of the thickness of the tube.