公开(公告)号：US09682421B2

公开(公告)日：2017-06-20

申请号：US14648794

申请日：2013-12-17

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Hidetaka Kanahashi ,  Hideto Oyama ,  Takehiro Nakaoka ,  Eisuke Kurosawa ,  Kazuyuki Tsutsumi

IPC: B22D11/041 ,  B22D11/11 ,  B22D11/00 ,  B22D11/10 ,  B22D21/00 ,  B22D27/06 ,  B22D7/00

CPC classification number: B22D11/001 ,  B22D7/005 ,  B22D11/041 ,  B22D11/10 ,  B22D11/11 ,  B22D21/005 ,  B22D27/06

Abstract: Provided is a device for titanium continuous casting (1) capable, even when continuously casting large diameter titanium ingots or titanium alloy ingots, of suppressing component segregation thereof. The device for titanium continuous casting (1) comprises: a mold (3) having an upper section having a circular upper opening (3a) for pouring in molten metal (6), and a bottom section having a lower opening for continuously drawing ingots (11); and a plurality of plasma torches (4, 5) to heat the molten metal in the mold (3) from the upper opening (3a) side. The plurality of plasma torches (4, 5) are disposed so that the amount of heat input to the molten metal (6) present in the outer circumference enclosing the center of the upper opening (3a) is greater than the amount of heat input to the molten metal (6) present in the center of the upper opening (3a).

公开(公告)号：US09333556B2

公开(公告)日：2016-05-10

申请号：US14646366

申请日：2014-01-23

Applicant: Kobe Steel, Ltd.

Inventor： Eisuke Kurosawa ,  Takehiro Nakaoka ,  Kazuyuki Tsutsumi ,  Hideto Oyama ,  Hidetaka Kanahashi ,  Hitoshi Ishida ,  Daiki Takahashi ,  Daisuke Matsuwaka

IPC: B22D11/115 ,  B22D11/041 ,  B22D27/02 ,  B22D11/103 ,  B22D11/117 ,  B22D21/00 ,  B22D11/00 ,  B22D11/11 ,  B22D27/04

CPC classification number: B22D11/041 ,  B22D11/001 ,  B22D11/103 ,  B22D11/11 ,  B22D11/115 ,  B22D11/117 ,  B22D21/005 ,  B22D27/02 ,  B22D27/04

Abstract: A continuous casting method in which a molten metal obtained by melting titanium or a titanium alloy is injected into a bottomless mold having a rectangular cross-section and withdrawn downward while being caused to solidify, wherein a plasma torch (7) is caused to rotate in the horizontal direction above the surface of the molten metal (12) in the mold (2), and a horizontally rotating flow is generated by electromagnetic stirring on at least the surface of the molten metal (12) in the mold (2). It is thereby possible to cast a slab in which the casting surface condition is excellent.

Abstract translation: 一种连续铸造方法，其中将通过熔化钛或钛合金获得的熔融金属注入到具有矩形横截面的无底模具中，并使其固化下来，其中使等离子体焰炬（7）在 在模具（2）中的熔融金属（12）的表面上方的水平方向，并且在至少模具（2）中的熔融金属（12）的表面上通过电磁搅拌产生水平旋转的流动。 从而可以铸造铸造表面状态优异的板坯。

公开(公告)号：US20150273573A1

公开(公告)日：2015-10-01

申请号：US14437250

申请日：2014-01-10

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Eisuke Kurosawa ,  Takehiro Nakaoka ,  Kazuyuki Tsutsumi ,  Hideto Oyama ,  Hidetaka Kanahashi ,  Hitoshi Ishida ,  Daiki Takahashi ,  Daisuke Matsuwaka

IPC: B22D11/00 ,  B22D11/055 ,  B22D21/02 ,  B22D11/041

CPC classification number: B22D11/001 ,  B22D11/041 ,  B22D11/055 ,  B22D11/117 ,  B22D11/188 ,  B22D11/207 ,  B22D11/22 ,  B22D21/022 ,  B22D23/10 ,  F27D2099/0031

Abstract: By controlling the temperature (TS) of a surface portion (11a) of an ingot (11) in a contact region (16) between a mold (2) and the ingot (11) and/or a passing heat flux (q) from the surface portion (11a) of the ingot (11) to the mold (2) in the contact region (16), the thickness (D) in the contact region (16) of a solidified shell (13) obtained by the solidification of molten metal (12) is brought into a predetermined range. Consequently an ingot having a good casting surface state can be cast.

Abstract translation: 通过控制模具（2）和锭（11）之间的接触区域（16）中的锭（11）的表面部分（11a）和/或通过的热通量（q）之间的温度（TS） 在接触区域（16）中，锭（11）与模具（2）的表面部分（11a），固化壳体（13）的接触区域（16）中的厚度（D） 使熔融金属（12）进入预定范围。 因此，可以铸造具有良好铸造表面状态的铸块。

公开(公告)号：US09796016B2

公开(公告)日：2017-10-24

申请号：US15375595

申请日：2016-12-12

Applicant: Kobe Steel, Ltd.

Inventor： Eisuke Kurosawa ,  Kazuyuki Yanagiya ,  Takehiro Nakaoka ,  Hidetaka Kanahashi

IPC: B22D11/10 ,  B22D11/11 ,  B22D41/015 ,  B22D11/00 ,  B22D11/041 ,  B22D21/00

CPC classification number: B22D11/001 ,  B22D11/041 ,  B22D11/10 ,  B22D11/11 ,  B22D21/005 ,  B22D27/04 ,  B22D41/015

Abstract: The present invention provides a method for casting a slab with good cast surface quality. The method includes pouring molten metal 8 into a mold 2 from one of the paired shorter sides of the mold 2 while allowing superheat ΔT [° C.], which is a temperature difference obtained by subtracting the melting point Tm [° C.] of the raw material from the temperature Tin [° C.] of the molten material on the surface of the molten metal in the mold and at the pouring point of the molten metal, to satisfy the following Formula (1) and Formula (2): 0.0014ΔT2 +0.0144ΔT+699.45>800   Formula (1) 0.0008ΔT2 +0.2472ΔT+853.02

公开(公告)号：US20140360694A1

公开(公告)日：2014-12-11

申请号：US14372598

申请日：2013-03-06

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Takehiro Nakaoka ,  Kazuyuki Tsutsumi ,  Eisuke Kurosawa ,  Hideto Oyama ,  Hidetaka Kanahashi ,  Hitoshi Ishida ,  Daiki Takahashi ,  Daisuke Matsuwaka

IPC: B22D11/00 ,  B22D11/041

CPC classification number: B22D11/008 ,  B22D11/001 ,  B22D11/041 ,  B22D11/103 ,  B22D27/04 ,  B22D41/015 ,  F27D11/08 ,  F27D2099/0031

Abstract: The continuous casting device according to the present invention enables at least some of a plurality of hearths (3) to be converted between being hearths (13) used for titanium, which are used during the continuous casting of titanium ingots, and being hearths (23) used for titanium alloy, which are used during the continuous casting of titanium alloy ingots. The number of hearths (23) used for titanium alloy is greater than the number of hearths (13) used for titanium. Also, the total capacity of the hearths (23) used for titanium alloy is greater than the total capacity of the hearths (13) used for titanium. Thus, titanium ingots and titanium alloy ingots can each be continuously cast by means of a single piece of equipment.

Abstract translation: 根据本发明的连续铸造装置能够使多个炉床（3）中的至少一些在用于钛锭的连续铸造期间使用的用于钛的炉床（13）和炉床（23）之间转换 ），用于钛合金锭连续铸造中使用的钛合金。 用于钛合金的炉床（23）的数量大于用于钛的炉床（13）的数量。 此外，用于钛合金的炉床（23）的总容量大于用于钛的炉床（13）的总容量。 因此，钛锭和钛合金锭可以通过单件设备连续铸造。

公开(公告)号：US09908174B2

公开(公告)日：2018-03-06

申请号：US15718005

申请日：2017-09-28

Applicant: Kobe Steel, Ltd.

Inventor： Eisuke Kurosawa ,  Takehiro Nakaoka ,  Hideto Oyama ,  Hidetaka Kanahashi

IPC: B22D11/115 ,  B22D11/041 ,  H05H1/44 ,  F27D27/00 ,  B22D21/00 ,  B22D11/00

CPC classification number: B22D11/115 ,  B22D11/00 ,  B22D11/001 ,  B22D11/04 ,  B22D11/041 ,  B22D21/005 ,  B22D27/02 ,  F27D27/00 ,  H05H1/44

Abstract: In the present invention the torch movement period is 20-40 seconds, with the torch movement period being the time required to move plasma torches (which heat the surface of molten metal in the casting mold) one time. The average heat input amount at multiple sites, which are obtained by dividing the initial solidification portion (which is where the molten metal makes contact with the casting mold and first solidifies) into multiple sites in the circumferential direction of the casting mold, is 1.0-2.0 MW/m2. The molten metal advection time, which is the time required for electromagnetically stirred molten metal to travel the length of the torch heating region of the surface of the molten metal in the lengthwise direction of the casting mold, is 3.5 seconds or less.

公开(公告)号：US09427796B2

公开(公告)日：2016-08-30

申请号：US14439798

申请日：2014-01-23

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Takehiro Nakaoka ,  Eisuke Kurosawa ,  Kazuyuki Tsutsumi ,  Hideto Oyama ,  Hidetaka Kanahashi ,  Hitoshi Ishida ,  Daiki Takahashi ,  Daisuke Matsuwaka

IPC: B22D11/16 ,  B22D27/04 ,  B22D11/00 ,  B22D11/041 ,  B22D27/02 ,  B22D11/103 ,  B22D11/117 ,  B22D21/00

CPC classification number: B22D11/001 ,  B22D11/041 ,  B22D11/103 ,  B22D11/117 ,  B22D11/16 ,  B22D21/005 ,  B22D27/02 ,  B22D27/04

Abstract: Disclosed is a continuous casting method in which a melt obtained by melting titanium or a titanium alloy is poured into a bottomless mold and is drawn downward while being solidified, wherein: the surface of the melt in the mold is heated by horizontally moving a plasma torch over the surface of the melt; thermocouples are provided at a plurality of locations along the circumferential direction of the mold; if the temperature of the mold measured by one of the thermocouples is lower than a target temperature, then the output of the plasma torch is increased when the plasma torch comes close to the location where that thermocouple is installed; and if said temperature is higher than the target temperature, then the output of the plasma torch is decreased when the plasma torch comes close to the location where that thermocouple is installed.

Abstract translation: 公开了一种连续铸造方法，其中通过熔化钛或钛合金获得的熔体被浇注到无底模中并在固化的同时被向下拉，其中：通过水平移动等离子体焰炬来加热模具中的熔体表面 在熔体的表面上; 沿着模具的圆周方向的多个位置设置热电偶; 如果由一个热电偶测量的模具的温度低于目标温度，则当等离子体焰炬靠近安装该热电偶的位置时，等离子体焰炬的输出增加; 并且如果所述温度高于目标温度，则当等离子体焰炬靠近安装该热电偶的位置时，等离子体焰炬的输出减小。

公开(公告)号：US09162281B2

公开(公告)日：2015-10-20

申请号：US14372598

申请日：2013-03-06

Applicant: Kobe Steel, Ltd.

Inventor： Takehiro Nakaoka ,  Kazuyuki Tsutsumi ,  Eisuke Kurosawa ,  Hideto Oyama ,  Hidetaka Kanahashi ,  Hitoshi Ishida ,  Daiki Takahashi ,  Daisuke Matsuwaka

IPC: B22D11/00 ,  B22D11/041 ,  B22D11/103 ,  B22D41/015 ,  F27D11/08 ,  F27D99/00

CPC classification number: B22D11/008 ,  B22D11/001 ,  B22D11/041 ,  B22D11/103 ,  B22D27/04 ,  B22D41/015 ,  F27D11/08 ,  F27D2099/0031

Abstract: The continuous casting device according to the present invention enables at least some of a plurality of hearths (3) to be converted between being hearths (13) used for titanium, which are used during the continuous casting of titanium ingots, and being hearths (23) used for titanium alloy, which are used during the continuous casting of titanium alloy ingots. The number of hearths (23) used for titanium alloy is greater than the number of hearths (13) used for titanium. Also, the total capacity of the hearths (23) used for titanium alloy is greater than the total capacity of the hearths (13) used for titanium. Thus, titanium ingots and titanium alloy ingots can each be continuously cast by means of a single piece of equipment.

Abstract translation: 根据本发明的连续铸造装置能够使多个炉床（3）中的至少一些在用于钛锭的连续铸造期间使用的用于钛的炉床（13）和炉床（23）之间转换 ），用于钛合金锭连续铸造中使用的钛合金。 用于钛合金的炉床（23）的数量大于用于钛的炉床（13）的数量。 此外，用于钛合金的炉床（23）的总容量大于用于钛的炉床（13）的总容量。 因此，钛锭和钛合金锭可以通过单件设备连续铸造。

公开(公告)号：US10022784B2

公开(公告)日：2018-07-17

申请号：US15296559

申请日：2016-10-18

Applicant: KOBE STEEL, LTD.

Inventor： Eisuke Kurosawa ,  Takehiro Nakaoka ,  Kazuyuki Tsutsumi ,  Hideto Oyama ,  Hidetaka Kanahashi

IPC: B22D11/00 ,  B22D11/041 ,  B22D7/00 ,  B22D9/00 ,  B22D11/12 ,  B22D11/14 ,  B22D11/11 ,  B22D11/117 ,  B22D21/00 ,  B22D27/06 ,  H05H1/44 ,  F27D99/00

Abstract: For continuously casting an ingot of titanium or titanium alloy, molten titanium or titanium alloy is poured into a top opening of a bottomless mold with a circular cross-sectional shape, the solidified molten metal in the mold is pulled downward from the mold, a plurality of plasma torches disposed on an upper side of molten metal in the mold such that their centers are located directly vertically above the molten metal in the mold, are operated to generate plasma arcs that heat the molten metal in the mold, and the plasma torches are moved in a horizontal direction above a melt surface of the molten metal in the mold, along a trajectory located directly vertically above the molten metal in the mold, while keeping a mutual distance between the respective plasma torches such that the plasma torches do not interfere with each other.

公开(公告)号：US09925582B2

公开(公告)日：2018-03-27

申请号：US15450420

申请日：2017-03-06

Applicant: Kobe Steel, Ltd.

Inventor： Kazuyuki Yanagiya ,  Eisuke Kurosawa ,  Takehiro Nakaoka ,  Hidetaka Kanahashi

IPC: B22D11/00 ,  B22D11/11 ,  B22D41/015 ,  B22D11/04 ,  B22D11/041 ,  B22D21/00 ,  F27D11/08

CPC classification number: B22D11/0408 ,  B22D11/001 ,  B22D11/041 ,  B22D11/11 ,  B22D21/005 ,  B22D27/04 ,  B22D41/015 ,  F27D11/08

Abstract: The present invention provides a method for casting a slab having a good cast surface. The method includes heating the surface of molten metal on a metal inlet side of a mold by a first heat source so that the following formulas: q≥0.87 and c≤11.762q+0.3095 are satisfied where c is a cycle time [sec] of turning movement of the first heat source, and q is an average amount of heat input [MW/m2] determined by accumulating an amount of heat input applied by at least the first heat source to the contact region between the upper surface of the slab on the metal inlet side and the mold, along the path of turning movement of the first heat source, and dividing the resultant accumulated value by the cycle time c.