| 摘要 |
PURPOSE:To remove fine crack and inner defect and to improve surface characteristics on a strip by melting the strip surface with a heating means to weld the fine crack by melting and executing rolling reduction to the strip, which the surface is melted, with rolls to weld the inner defect under pressing. CONSTITUTION:The heating means 11 is arranged just below casting rolls 2, 3, and hot rolling work is executed to the strip 10, on which the surface is melted with the heating means 11, with the rolls 13, 14. By this method, the fine crack is welded by melting and eliminated. Further, the inner defect in the surface layer is welded by pressing and the defect in the surface layer is eliminated. Further, crystal grain on the surface layer is made fine and uniform by rapidly cooling with the rolls 13, 14 and the deteriorated outer appearance is improved and the appearance of the product can be improved in beautiful view. |
