| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a roll for reduction rolling, allowing suppression of the occurrence of a fin flaw and an edge flaw. <P>SOLUTION: The roll for the reduction rolling used in a three-roll type reducing mill is prepared. Next, while the roll for the reduction rolling is rotated around the roll axis, a ridge part 52 formed in an adjacent portion between a caliber part and a flange part is cut to round the ridge part 52. In a process of rounding the ridge part 52, in a ridge part region RA52 within a range of 3.0 mm in the roll axis direction with the top of the ridge part 52 as the center, the average of curvature radii measured at 0.5 mm pitch is set to 2.5-3.0 mm, and the difference between the maximum value and the minimum value of the curvature radii is set to 1.0 mm or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
