公开(公告)号：US20180001377A1

公开(公告)日：2018-01-04

申请号：US15546401

申请日：2016-01-22

Applicant: JFE STEEL CORPORATION

Inventor： Keigo TOISHI ,  Hiroyuki OHNO ,  Norichika ARAMAKI ,  Yuji MIKI

IPC: B22D11/124 ,  B22D11/20

CPC classification number: B22D11/1246 ,  B21B1/466 ,  B21B2201/14 ,  B22D11/1206 ,  B22D11/1282 ,  B22D11/20 ,  B22D11/207 ,  B22D11/225

Abstract: Provided is a continuous casting method of steel that prevents a solidification completion position from being changed even when a drawing speed V of a cast slab is changed. The method includes drawing a cast slab by setting a drawing speed V0 while spraying cooling water to the cast slab at a cooling water spray amount W0 [kg/ton-cast slab]. Then, changing the drawing speed to the speed V1 while spraying cooling water to the cast slab at a cooling water spray amount W1 [kg/ton-cast slab]. The method further includes spraying cooling water to the cast slab at a cooling water spray amount Wt [kg/ton-cast slab] during a period of time t that is obtained by dividing a target length Lt by the drawing speed V0. The water spray amount Wt satisfying either formula (1): Wt W1 under a condition of V1>V0.