公开(公告)号：US20240269737A1

公开(公告)日：2024-08-15

申请号：US18567590

申请日：2022-05-31

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Toshio KAKU ,  Hiroki FURUKAWA

IPC: B22D41/18 ,  F27D3/14

CPC classification number: B22D41/18 ,  F27D3/14

Abstract: A stopper for continuous casting that is intended to prevent adhesion of inclusions to the vicinity of a fitting part of a stopper, and to prevent a nose region of the stopper from cracking or peeling off due to insufficient strength. The stopper for continuous casting includes a gas flow cavity in a vertically-extending central part thereof. In at least part of a vertical section of a nose periphery region of the stopper, a porous refractory material having a gas permeability is arranged on the side of an outer peripheral surface of the nose periphery region. A refractory material having higher strength than that of the porous refractory material is arranged on the side of an inner peripheral surface of the nose periphery region.

公开(公告)号：US20220324017A1

公开(公告)日：2022-10-13

申请号：US17639848

申请日：2020-09-17

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Takuya OKADA ,  Toshio KAKU ,  Hiroki FURUKAWA

IPC: B22D41/58 ,  B22D41/16 ,  B22D11/11 ,  B22D1/00

Abstract: A tundish upper nozzle structure and a continuous casting method make it possible to cause inclusions to float within a tundish. A flange-shaped member having an outside dimension greater than that of an upper end of a tundish upper nozzle is provided along a part or the entirety of the circumference of the upper end of the tundish upper nozzle, and one or more gas discharge holes are provided in one or more of the following surfaces: a lower surface, an outer peripheral surface and a top surface of the flange-shaped member, and a region of an outer peripheral surface of the tundish upper nozzle below the flange-shaped member. A length in the tundish upper nozzle structure is adjusted to cause almost all gas to float upwardly, or to adjust the flow rate of gas flowing downwardly toward the inner bore of the tundish upper nozzle, and the flow rate of gas floating upwardly.

公开(公告)号：US20220134420A1

公开(公告)日：2022-05-05

申请号：US17424301

申请日：2020-01-15

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Kazuhisa KATSUKI ,  Junya YANO ,  Hiroki FURUKAWA

IPC: B22D41/50

Abstract: It is intended to provide a flat immersion nozzle capable of stabilizing a molten steel discharge flow to stabilize an in-mold bath surface, i.e., reduce the fluctuation of the in-mold bath surface. Provided is an immersion nozzle having a flat portion whose inner bore has a thickness and a width greater than the thickness, wherein two lateral protrusions each protruding in a thickness direction are provided on each of opposed walls of the flat portion extending in a width direction. The lateral protrusions are arranged at axial symmetrical positions with respect to a longitudinal central axis of the width-directionally extending walls, in pairs, such that each of them extends obliquely downwardly in the width direction, wherein two pairs of the lateral protrusions are arranged, respectively, on the opposed width-directionally extending walls, in opposed relation.

公开(公告)号：US20220062984A1

公开(公告)日：2022-03-03

申请号：US17417461

申请日：2019-12-18

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Shinichi FUKUNAGA ,  Toshio KAKU ,  Hiroki FURUKAWA ,  Takuya OKADA

IPC: B22D41/18 ,  B22D11/18

Abstract: The precision of grasping or controlling backpressure around a gas discharge portion in a stopper for continuous casting can be improved with a stopper for continuous casting which includes a cavity for conveying gas in a vertical direction center of the stopper, one or a plurality of gas discharge holes passing through from the cavity to the outside in a distal center or a side surface of a reduced-diameter region including a fitted portion to a lower nozzle, and a pressure control component in a part of an area above the gas discharge hole within the cavity.