公开(公告)号：US10265744B2

公开(公告)日：2019-04-23

申请号：US15108551

申请日：2013-12-26

Applicant: POSCO

Inventor： Jea-Sook Chung ,  Il-Sin Bae ,  Young-Ju Ko ,  Kyeong-Mi Park ,  In-Jae Lee ,  Choong-Yun Lee ,  Suk-Cheol Song ,  Seong-Yeon Kim ,  Jong-Yeon Hwang ,  Sang-Hyeon Lee

IPC: B21B1/46 ,  B22D11/126 ,  B21B45/00 ,  B21B1/26 ,  B21B37/74

Abstract: A hot rolling device, according to one embodiment of the present invention, may comprise: a cast part supply portion for producing a cast part; a hot roller, linked to the cast part supply portion, for receiving and hot-rolling the cast part; and a heating unit, arranged between the cast part supply portion and the hot roller, for reheating an outer surface portion in the widthwise direction of the cast part while latent heat is maintained in the center portion of the widthwise direction of the cast part from preheating.

公开(公告)号：US10471502B2

公开(公告)日：2019-11-12

申请号：US15107903

申请日：2014-12-02

Applicant: POSCO

Inventor： Seong-Yeon Kim ,  Young-Ju Ko ,  Il-Sin Bae ,  Choong-Yun Lee ,  In-Jae Lee ,  Jea-Sook Chung ,  Sang-Hyeon Lee

IPC: B22D11/04 ,  B22D11/12 ,  B22D11/14 ,  B21B1/46 ,  B22D11/043 ,  B22D11/126 ,  B21B15/00

Abstract: A continuous casting and rolling apparatus according to one embodiment of the present invention provides: a continuous caster for generating a steel sheet; a first rolling unit associated with the continuous caster; and a second rolling unit which is spaced apart in the outlet of the first rolling unit and comprises: a rolling mill for pressing down the steel sheet; and a cutter for cutting a portion of the steel sheet, wherein the cutter is spaced from the second rolling unit by a length corresponding to the length of the steel sheet discharged in an at least discontinuous rolling mode, and may comprise a cut withdrawal unit provided between the first rolling unit and the second rolling unit. In addition, a continuous casting and rolling method according to another embodiment of the present invention is a continuous casting and rolling method in which a continuous rolling mode and a discontinuous rolling mode are switched to and from each other, and may comprise: a continuous casting step for generating a steel sheet; a rolling step for pressing down the steel sheet to a rolling mill after the continuous casting step; and a cutting step for cutting the steel sheet between the continuous casting step and the rolling step in a discontinuous rolling mode, and cutting the steel sheet with a cutter provided by being spaced apart from the rolling mill at an interval corresponding to the length of the steel sheet being cut and discharged in an at least discontinuous rolling mode.

公开(公告)号：US10239143B2

公开(公告)日：2019-03-26

申请号：US15107281

申请日：2014-12-22

Applicant: POSCO

Inventor： Seung-Ho Lim ,  Yeong-Seon Park ,  Seong-Yeon Kim ,  Ki-Hwan Kim ,  Ji-Won Yu

IPC: B23K7/06 ,  B23K7/10 ,  B22D11/126 ,  B23K7/00 ,  B23K101/18 ,  B23K103/04 ,  B23K103/06

Abstract: A slab scarfing apparatus comprises: an upper nozzle unit having an upper surface nozzle for scarfing an edge portion of the upper surface of a slab and having a first side nozzle scarfing an upper edge portion of the side surface of the slab and moving together with the upper surface nozzle; a lower nozzle unit having a lower nozzle for scarfing an edge portion of the lower surface of the slab and having a second side nozzle scarfing a lower edge portion of the side surface of the slab and moving together with the lower nozzle; and a moving apparatus for moving the upper nozzle unit and the lower nozzle unit to allow the upper nozzle unit and the lower nozzle unit to be adjacent to or to be spaced apart from an edge portion of the slab. A method of controlling the apparatus is provided.