MANUFACTURING METHOD OF H-STEEL WITH ROLL MARK

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of H-steel with a clear roll mark.SOLUTION: The manufacturing method of H-steel with a clear roll mark includes the steps of: arranging one vertical roll 5a in which an intaglio part C shaped corresponding to a target roll mark is formed with a center height in a vertical direction of a circumferential face and the other vertical roll 5b making a pair with one vertical roll 5a at a preset interval; passing a steel place 1 to be formed into an H-steel product between the pair of vertical rolls 5a and 5a to reduce pressure; reducing the inner width of the web of 2 of the steel plate 1 to reduce the height of the web 2, and simultaneously bringing the intaglio part C into contact with the outer surface of one flange 3a of the steel plate 1; and forming a roll mark on the outer surface of one flange 3a.SELECTED DRAWING: Figure 1