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：US11421295B2

公开(公告)日：2022-08-23

申请号：US16628436

申请日：2018-07-06

Applicant: POSCO

Inventor： Jong-Pan Kong ,  Jea-Sook Chung

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

Abstract: Provided is an ultra high-strength hot-rolled steel sheet, having tensile strength of 800 MPa, and a method for manufacture same, the method enabling excellent surface quality, workability, weldability as well as significantly reduced deviation of the mechanical property in the width and length directions of the steel sheet by means of an endless rolling mode in a continuous casting-direct rolling process.

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：US10286432B2

公开(公告)日：2019-05-14

申请号：US15107904

申请日：2014-11-12

Applicant: POSCO

Inventor： Jea-Sook Chung ,  Il-Sin Bae ,  Suk-Cheol Song ,  Young-Ju Ko ,  Kyeong-Mi Park ,  Jong-Hwan Lee

IPC: B21B1/46 ,  B21B1/26 ,  B22D11/12 ,  B21B45/00 ,  B22D11/126

Abstract: A continuous casting and rolling apparatus according to one embodiment of the present invention comprises: a continuous casting apparatus for producing a steel sheet; a roller, linked to the continuous casting apparatus, for receiving the steel sheet; and a push heat unit, connected to the continuous casting apparatus and/or the roller, for selectively carrying outing heating work or removal work with respect to a portion of the steel sheet. Also, a continuous casting and rolling method according to another embodiment of the present invention may comprise: a continuous casting step for producing a steel sheet; and a selective performance step for selectively carrying out heating work or removal work with respect to a portion of the steel sheet.