公开(公告)号：US20240375164A1

公开(公告)日：2024-11-14

申请号：US18578402

申请日：2022-06-02

Applicant: JFE STEEL CORPORATION

Inventor： Shinichiro AOE ,  Masashi OKA ,  Tetsuya ARAKAWA ,  Yukihiro MATSUBARA

IPC: B21B41/10 ,  B21B39/14

Abstract: A deflector roll, which changes a travelling direction of a metal strip being threaded, includes a roll main body that is rotatably supported by a roll frame and a sliding member that is provided on an outer surface of the roll main body. The sliding member is configured to have the metal strip wrapped thereon and to be movable along an axial direction of the roll main body while maintaining that wrapped state.

公开(公告)号：US20240149317A1

公开(公告)日：2024-05-09

申请号：US18281496

申请日：2022-02-01

Applicant: JFE STEEL CORPORATION

Inventor： Noriki FUJITA ,  Takuya KITAMURA ,  Tetsuya ARAKAWA ,  Yoshiki IKOMA ,  Takumi YAMADA

IPC: B21B37/16 ,  B21B3/02

CPC classification number: B21B37/165 ,  B21B3/02

Abstract: A cold rolling mill rolling condition setting method using a prediction model being generated with an explanatory variable being first multi-dimensional data obtained by transforming past rolling performance data including pre-cold rolling data of a roll material on an entry side of the cold rolling mill into multi-dimensional data, and an objective variable being post-cold rolling data of the roll material on a delivery side of the cold rolling mill, the method includes: estimating a post-rolling shape of a roll target material by inputting, to the prediction model, second multi-dimensional data generated from information including the pre-cold rolling data of the roll target material on the entry side of the cold rolling mill and a target rolling condition of the cold rolling mill; and changing the target rolling condition of the cold rolling mill such that the estimated post-rolling shape of the roll target material satisfies a predetermined condition.

公开(公告)号：US20230250503A1

公开(公告)日：2023-08-10

申请号：US18003343

申请日：2021-06-28

Applicant: JFE STEEL CORPORATION

Inventor： Yukihiro SHINGAKI ,  Tetsuya ARAKAWA ,  Yusuke SHIMOYAMA ,  Ayaka SERA

IPC: C21D8/12 ,  C22C38/08 ,  C22C38/04 ,  C22C38/02 ,  C21D9/46

CPC classification number: C21D8/1222 ,  C21D8/1233 ,  C21D8/1266 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C21D2201/05

Abstract: Provided is a method of manufacturing a grain-oriented electrical steel sheet that has a uniform texture all along the longitudinal direction and has small fluctuations in magnetic properties. The method includes subjecting a predetermined hot-rolled and annealed sheet to cold rolling, where at least one time of cold rolling has a total rolling reduction of 80 % or more and is performed by a tandem mill, rolling performed in at least one stand of the tandem mill is performed under conditions of a rolling reduction of 30 % or more and a biting temperature To °C of a work roll of the stand, and a temperature at which either or both of a leading end and a tail end of the hot-rolled and annealed sheet are bitten by the work roll is 70° C. or higher and at least 10° C. higher than the temperature To °C.

公开(公告)号：US20230080012A1

公开(公告)日：2023-03-16

申请号：US17800929

申请日：2020-11-17

Applicant: JFE STEEL CORPORATION

Inventor： Yukihiro MATSUBARA ,  Daiki HIOKA ,  Noriki FUJITA ,  Tetsuya ARAKAWA ,  Masaki HIRAI

IPC: B21B1/22

Abstract: A cold-rolled steel strip manufacturing facility includes: a joining device configured to join a trailing end of a preceding steel strip and a leading end of a following steel strip to form a joined steel strip; a looper configured to store the joined steel strip; a heating device configured to heat a joint portion between the preceding steel strip and the following steel strip over an entire width direction; and a cold rolling mill configured to cold-roll the joined steel strip for which the joint portion was heated by the heating device, wherein the heating device is switchable between an output state and a non-output state, and during a period in which the joint portion passes through the heating device, is switched to the output state.

公开(公告)号：US20230381844A1

公开(公告)日：2023-11-30

申请号：US18032472

申请日：2021-07-01

Applicant: JFE STEEL CORPORATION

Inventor： Noriki FUJITA ,  Miwa OHASHI ,  Tetsuya ARAKAWA ,  Yukihiro MATSUBARA

IPC: B21B45/02 ,  B21B13/02

CPC classification number: B21B45/0248 ,  B21B13/02

Abstract: A cold rolling facility includes: a cold tandem mill including rolling stands; and a rolling supply system including a first rolling oil supply system configured to supply first emulsion rolling oil, and a second rolling oil supply system configured to supply second emulsion rolling oil, wherein mixed rolling oil obtained by mixing the first and the second emulsion rolling oil is supplied at least to a specific rolling stand among the rolling stands in such a manner as to satisfy the following formula (1), 0.6≤F2/F1≤1.4 (1), where F1 denotes first horizontal force acting in a rolling direction on a roll included in the specific rolling stand, and F2 denotes second horizontal force acting in a rolling direction on a roll included in an upstream side rolling stand arranged on an upstream side of the specific rolling stand and neighboring with the specific rolling stand.