公开(公告)号：US12031192B2

公开(公告)日：2024-07-09

申请号：US18332752

申请日：2023-06-12

Applicant: JFE STEEL CORPORATION

Inventor： Gentaro Takeda ,  Hideyuki Takahashi ,  Tetsuya Iwata ,  Koji Sawamura

IPC: C21D9/46 ,  C21D1/26 ,  C21D9/56 ,  C22C38/02 ,  C23C2/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/46 ,  C21D1/26 ,  C21D9/561 ,  C21D9/562 ,  C22C38/02 ,  C23C2/0035 ,  C23C2/0038 ,  C23C2/004 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

Abstract: Provided is a continuous hot-dip galvanizing apparatus comprising: a vertical annealing furnace having heating, soaking zone, and cooling zones therein; and a hot-dip galvanizing line downstream of the cooling zone. The heating, soaking, and cooling zones each have, in its upper portion, at least one upper hearth roll and, in its lower portion, at least one lower hearth roll. The soaking zone has a first and second humidified gas supply ports to supply a humidified gas having a dew point of 10° C. to 30° C. to the soaking zone. The first and second humidified gas supply ports are 1.0 m to 5.0 m lower than the center of the lower and upper hearth rolls, respectively, and overlap the steel sheet. The first humidified gas supply port is provided only for an ascending pass and the second humidified gas supply port is provided only for a descending pass.

公开(公告)号：US20160214351A1

公开(公告)日：2016-07-28

申请号：US14914803

申请日：2014-08-22

Applicant: JFE STEEL CORPORATION

Inventor： Daisuke Harako ,  Tetsuya Iwata

IPC: B32B15/01 ,  C23C2/02 ,  C23C2/40 ,  C22C38/06 ,  C21D1/26 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D6/00 ,  C23C2/06 ,  C22C38/04

CPC classification number: B32B15/013 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/26 ,  C21D1/74 ,  C21D3/06 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0278 ,  C21D9/46 ,  C22C18/00 ,  C22C18/04 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/12993

Abstract: A high-strength galvanized steel sheet includes a base steel sheet having a specific chemical composition and a zinc coating layer disposed on the surface of the base steel sheet in a coating weight per side of 20 g/m2 to 120 g/m2, wherein the amount of hydrogen measured by a specific method is 0.05 mass ppm to 0.40 mass ppm; and ISisur/ISibulk and IMnsur/IMnbulk calculated by a specific method are not more than 2.0 and not more than 3.0, respectively.

Abstract translation: 高强度镀锌钢板包括具有特定化学成分的基体钢板和设置在基体钢板表面上的镀锌层，每面涂层重量为20g / m 2至120g / m 2，其中， 通过特定方法测量的氢的量为0.05质量ppm至0.40质量ppm; 和通过特定方法计算的ISisur / ISibulk和IMnsur / IMnbulk分别不大于2.0且不大于3.0。

公开(公告)号：US11718889B2

公开(公告)日：2023-08-08

申请号：US16955041

申请日：2018-11-20

Applicant: JFE STEEL CORPORATION

Inventor： Gentaro Takeda ,  Hideyuki Takahashi ,  Tetsuya Iwata ,  Koji Sawamura

IPC: C21D9/46 ,  C21D1/26 ,  C21D9/56 ,  C22C38/02 ,  C23C2/06 ,  C23C2/40

CPC classification number: C21D9/46 ,  C21D1/26 ,  C21D9/561 ,  C21D9/562 ,  C22C38/02 ,  C23C2/06 ,  C23C2/40

Abstract: A method for producing a hot-dip galvanized steel sheet includes supplying humidified gas to the soaking zone 12 in a manner such that: in passes in which the steel sheet moves upward, the humidified gas is supplied from first humidified gas supply ports 40A to 40E provided at positions higher by 1.0 m or more and 5.0 m or less than the centers of lower hearth rolls 54 and overlapping the steel sheet in the passes when viewed from the side of the soaking zone; and in passes in which the steel sheet moves downward, the humidified gas is supplied from second humidified gas supply ports 42A to 42E provided at positions lower by 1.0 m or more and 5.0 m or less than the centers of the upper hearth rolls 52 and overlapping the steel sheet in the passes when viewed from the side of the soaking zone.

公开(公告)号：US09895863B2

公开(公告)日：2018-02-20

申请号：US14914803

申请日：2014-08-22

Applicant: JFE Steel Corporation

Inventor： Daisuke Harako ,  Tetsuya Iwata

IPC: B32B15/01 ,  C23C2/02 ,  C23C2/40 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D1/26 ,  C21D6/00 ,  C21D9/46 ,  B32B15/04 ,  B32B15/18 ,  C21D1/74 ,  C23C2/06 ,  C22C18/00 ,  C22C18/04 ,  C21D8/02 ,  C21D3/06

CPC classification number: B32B15/013 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/26 ,  C21D1/74 ,  C21D3/06 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0278 ,  C21D9/46 ,  C22C18/00 ,  C22C18/04 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/12993

Abstract: A high-strength galvanized steel sheet includes a base steel sheet having a specific chemical composition and a zinc coating layer disposed on the surface of the base steel sheet in a coating weight per side of 20 g/m2 to 120 g/m2, wherein the amount of hydrogen measured by a specific method is 0.05 mass ppm to 0.40 mass ppm; and ISisur/ISibulk and IMnsur/IMnbulk calculated by a specific method are not more than 2.0 and not more than 3.0, respectively.