Production method of molding rolling method and the H-shaped steel of the rough shape steel pieces

摘要

PROBLEM TO BE SOLVED: To provide a forming rolling method of a rough shape slab, capable of efficiently securing width and thickness of a part corresponding to a flange in a rough shape slab for manufacturing a wide flange beam.;SOLUTION: In a forming rolling method of a rough shape slab, the rough shape slab is manufactured by forming and rolling a flat slab with a plurality of grooves Box-1, Box-2, Box-3, K-1. The forming rolling method of a rough shape slab includes a first forming rolling step of forming a wedge at the center of a short side of the flat slab by the first groove Box-1 provided with a triangular chevron-shaped part at the center of a groove bottom part, and designed so that a hole width at a top end of the triangular chevron-shaped part can be wider than the short side of the flat slab and a hole width of the groove bottom part can be narrower than the short side of the flat slab.;COPYRIGHT: (C)2014,JPO&INPIT