| 摘要 |
PROBLEM TO BE SOLVED: To execute stable rolling without causing buckling of a rolled material and ununiformity of a thickness quantity, by improving centering performance of the rolled material in a groove more than usual, in a rough rolling process of using the groove when manufacturing H-shaped steel.SOLUTION: A manufacturing method of H-shaped steel comprises a rough rolling process, an intermediate rolling process and a finish rolling process. The manufacturing method of the H-shaped steel is provided so that a plurality of grooves for drafting a rolled material are curved in a rough rolling machine for executing the rough rolling process, and a plurality of path rolling of the rolled material are executed in a part or the whole of the plurality of grooves, and in any or the whole of the grooves on and after a second groove among the plurality of grooves, the width length of the rolled material after rolling in a path for roling in the first place, is set larger than the length of a groove bottom width of the groove for executing the rolling.SELECTED DRAWING: Figure 3 |
