| 摘要 |
PURPOSE:To decrease in-plane anisotropy and to produce a titled steel plate and strip having good workability by setting the rough rolling conditions and finish rolling conditions for austenite stainless steel in a specific range, and cold rolling said steel without annealing after hot rolling. CONSTITUTION:In hot rolling of austenite stainless steel, the steel is first subjected to rough rolling at the rolling temps. and average drafts per pass in a roughing mill group within a range (A, B, C, D, E) so that recrystallization structure is obtained after the rough rolling. The material rolled to have the recrystallization structure is rolled in a finish rolling mill group in such a way that the relations between the rolling temps. and the average drafts per pass are kept within a range (F, G, H, I) so as to have un-recrystallization structure. Thereore, the material has the structure of less grain boundaries wherein the structure obtained in the rough rolling is simply stretched. Thus the superior material is obtained even by cold rolling with omission of annealing after hot rolling. |
