| 摘要 |
PURPOSE:To enable production of a sheet of a stainless steel having excellent characteristics while omiting an annealing stage by regulating the content of C, N, Mn, Ni and P of an austenitic stainless steel to specific values and controlling the draft and gnawing temp. in the stage of hot rolling then cold rolling the steel. CONSTITUTION:An austenitic stainless steel slab contg. 0.005-0.07% C, <1.0% Si, <3.0% Mn, 16-20% Cr, 6-11.5% Ni, 0.005-0.2% N, <0.040% P, and <0.010% S, and having the compsn. of the 1st points A, BP, CP, D (where the values of BP, CP change respectively with the content of P) with respect to C, N, Mn, Ni, and P is subjected to hot rough rolling to a plate material. The hot finish rolling thereof is accomplished at the draft and gnawing temp. at least in the 2nd range enclosed by P, Q, R, ST and thereafter the plate material is pickled with the mixed solution of nitric acid and hydrochloric acid added with ferric salt and is finished by cold rolling without annealing to a steel strip which is then annealed. Even if the annealing after the hot rolling is omitted, the steel sheet having small in-plane anisotropy of mechanical properties and less surface roughnening is produced. |
