| 摘要 |
PURPOSE: A twin roll strip casting process of a martensitic stainless strip is provided to prevent a board breakage by securing a constant thickness and controlling variations in a casting speed and a target casting speed. CONSTITUTION: A method for manufacturing a martensitic stainless strip comprises following steps. The martensitic stainless strip is casted by injecting molten steel in between casting rollers rotating in an opposite direction. The target casting speed is determined before the casting is started. After the casting is started, more than two steps of a ratio of changes increase toward the target casting speed. The ratio of the changes is gradually slow. A first ratio of the changes is 1/20~1/5 of the target casting speed. A second ratio of the changes is 1/50~1/20 of the target casting speed. |
