公开(公告)号：US20170182534A1

公开(公告)日：2017-06-29

申请号：US15314744

申请日：2015-05-13

申请人： JFE STEEL CORPORATION

发明人： Hiroto GOTO ,  Naoki NAKATA ,  Yukio KIMURA ,  Masaru MIYAKE ,  Satoshi UEOKA ,  Nobuo NISHIURA ,  Sonomi SHIRASAKI ,  Takaomi KATO

IPC分类号： B21B15/00 ,  B21B1/38 ,  B21B1/26

CPC分类号： B21B15/0007 ,  B21B1/22 ,  B21B1/224 ,  B21B1/26 ,  B21B1/34 ,  B21B1/38 ,  B21B38/00 ,  B21B38/006 ,  B21B2001/225 ,  B21B2015/0014 ,  B21B2263/20

摘要： A method for manufacturing a hot-rolled steel sheet having a large thickness and a large width, a larger sheet width and a lower temperature can stably be cut at a cutting load equal to that of a conventional steel sheet having a usual sheet thickness, a usual sheet width and a usual temperature. In a rough rolling step, the steel sheet is formed so that the shortest length L (mm) from a concave portion bottom to a convex portion top of the fishtail shape satisfies Equation (1) mentioned below, and an intermediate portion between the concave portion bottom and the convex portion top, defined as a desired cutting location, is cut: (2X+30)≦L≦300  (1), in which X is a maximum deviation (mm) of the cutting location of a crop cutting machine and 0≦X≦90.