Method For Manufacturing Austenitic Stainless Steel Strip

Abstract: Provided is a method for manufacturing an austenitic stainless steel strip having both of high creep strength and satisfactory oxidation resistance. A method for manufacturing an austenitic stainless steel strip comprises: a hot rolling step for subjecting a material to be hot-rolled to a hot rolling procedure, in which the material to be hot-rolled has a component composition that contains, in % by mass, more than 20.0% and 30.0% or less of Ni, more than 15.0% and 18.0% or less of Cr, 1.0 to 2.0% of Mo, 3.5% or more and less than 5.0% of Al, more than 1.0% and 2.0% or less of Nb+Ta, 0.3% or less of Ti+V, 1.0% or less of Si, 2.0% or less of Mn, 0.01 to 0.3% of Zr, 0.005 to 0.045% of C, 0.001 to 0.03% of B, and also contains at least one element selected from Y, La, Ce and Hf in an amount such that the content of Y+La+Ce+Hf+Zr can become 0.01 to 0.5% with the remainder comprising Fe and unavoidable impurities; a cold rolling step for subjecting the hot-rolled steel strip to a cold rolling procedure; and a solution treatment step for heating the cold-rolled steel strip, then maintaining the heated steel strip at that temperature, and then subjecting the heated steel sheet to a rapid cooling procedure.

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