| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling method for a hot rolled steel plate that can reduce a warpage generated by rolling by a rough rolling mill, stabilize accuracy of a cutting position of a crop and achieve stable passing of a steel sheet at a finish-rolling mill group.SOLUTION: A rolling method for a hot rolled steel sheet performs a rough rolling step in which a final rolling pass for reducing a thickness of a plate is performed in a reversible rough rolling mill on the downmost stream side of at least one reversible rolling mill, and then a pass for flattening which changes a roll gap during passing of a plate is performed, of a pass from an upstream side toward a downstream side or reciprocatory passes from a downstream side toward an upstream side and from the upstream side toward the downstream side, in the rolling mill.SELECTED DRAWING: Figure 5 |
