| 摘要 |
PURPOSE:To polish effectively and online the surface of a cooling roll and to produce a quickly cooled thin strip having a good surface characteristic over the entire period of operation by polishing the surface of the cooling roll with a brush provided with an adequate angle with respect to the longitudinal direction of the thin strip. CONSTITUTION:The surface of the cooling roll 1 is polished by the rotary brush 4 of which the revolving shaft is inclined at >=15 deg. with respect to the revolving shaft of the cooling roll 1, in order words, the longitudinal direction of the thin strip. The generation of dents on the surface of the thin strip cannot be thoroughly averted if the cooling roll is polished at the angle smalle than 15 deg.. The surface characteristic of the thin strip is deteriorated when the average roughness on the surface of the roll is larger than 0.25mum even if the polishing direction is adequate and therefore the average roughness of the surface of the roll 1 is kept at <=0.25mum. The stable production of the quickly cooled thin strip having the good surface characteristic over the entire period of the operation is thus made possible. |
