| 摘要 |
PURPOSE:To obtain a titled thin steel sheet in a method for subjecting a continuously cast slab of a ferritic stainless steel to hot rolling at a high temp. without cooling down to an ordinary temp. after casting by knowing the characteristics in the cooling process after casting and specifying a soaking treatment. CONSTITUTION:The continuously cast slab of the ferritic stainless steel is made to attain a temp. region of 800-1,000 deg.C within 30-300min time after the start of casting in the cooling process after casting. The relation between the soaking temp. and the soaking time is specified to the prescribed conditions in the shaded range enclosed by the straight lines AB, BC, CD, DA connecting the respective points of the points A-D in the figure, under which the steel is soaked. The hot rolling is then started at the temp. under the above-described conditions to form the hot-rolled steel sheet and thereafter the steel sheet is cold-rolled by the conventional method. The ferritic stainless steel sheet having extremely small ridging height is thus produced with the throwing energy smaller than in an ordinary stage. |
