DIRECT PRODUCTION FOR TWO PHASE STAINLESS STEEL THIN STRIP HAVING EXCELLENT SUPERPLASTICITY AND SURFACE PROPERTY

摘要

PURPOSE:To reduce production cost by solidifying molten steel for two phase stainless having the specified wt.% Ni, Cr, etc., after cooling rapidly on a rotating surface of roll, to form a thin strip. CONSTITUTION:The compositions of components for the molten two phase stainless steel consist of by weight =0.02% C, =2.0% Si, =3.0% Mn, 3-10% Ni, 20-35% Cr, 0.5-6.0% Mo, 0.08-0.3% N, and a little specified quantities of the other elements, such as W, V, B, and Cu. Next, a tundish 3 and a molten metal vessel 1 are arranged to the cooling single roll 4, and the molten two phase stainless steel 2 in the vessel 1 is poured into the tundish 3. Then, the molten steel 2 is cooled rapidly and solidified on the rotating surface of the roll 4 rotated in counterclockwise direction, to form the continuous thin hoop having =5 mm thickness. As the products, such as the thin strip is obtd. by only the casting process, the production cost is reduced.