JPH05277659A - Method for continuously casting clad steel sheet by twin rolls - Google Patents

Method for continuously casting clad steel sheet by twin rolls

Info

Publication number
JPH05277659A
JPH05277659A JP10530892A JP10530892A JPH05277659A JP H05277659 A JPH05277659 A JP H05277659A JP 10530892 A JP10530892 A JP 10530892A JP 10530892 A JP10530892 A JP 10530892A JP H05277659 A JPH05277659 A JP H05277659A
Authority
JP
Japan
Prior art keywords
molten metal
layer
clad steel
roll
rolls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10530892A
Other languages
Japanese (ja)
Inventor
Kazumi Yasuda
一美 安田
Eiichi Takeuchi
栄一 竹内
Akifumi Seze
昌文 瀬々
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP10530892A priority Critical patent/JPH05277659A/en
Publication of JPH05277659A publication Critical patent/JPH05277659A/en
Withdrawn legal-status Critical Current

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  • Continuous Casting (AREA)

Abstract

PURPOSE:To provide a casting method for continuously producing a clad steel sheet by composing the different kinds of molten metals by twin roll type continuous casting for producing a cast strip. CONSTITUTION:Two pieces of pouring nozzles 4a, 4b having different lengths are immersed into a molten metal pouring basin part 3 formed by two rolls 1 and side weirs 2 arranged at both end surfaces of the rolls, and the different kinds of the molten metals are poured into the pouring nozzles, respectively to form two molten metal layers 3a, 3b at the upper and the lower parts. Then, the outer layer solidified shell 6a by the molten metal at the upper layer contacting with the roll and the inner layer solidified shell 6b by the molten metal at the lower layer are formed and the solidified shells in these inner and outer layers are integratedly composed at a roll kiss point 7 or at the front or the rear parts thereof to produce the clad steel sheet. By this method, the formed solidified shells are composed at the roll kiss point, and the complex layer cast sheet having the prescribed sheet thickness is continuously obtd. and the process of hot-rolling, etc., can be saved and the improvement of the productivity and the reduction of the cost are obtd.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、薄板鋳片を製造する双
ロール式連続鋳造により、異種の溶融金属を複合させて
連続的にクラッド鋼板を製造する鋳造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method for continuously producing a clad steel plate by compounding different kinds of molten metals by twin roll type continuous casting for producing a thin plate slab.

【0002】[0002]

【従来の技術】従来クラッド鋼板を製造する技術として
は、圧延法または爆着法による方法が知られている。こ
れら技術は、それぞれ個別に製造された板材を圧延また
は爆発力により密着させる方法である。
2. Description of the Related Art Conventionally, as a technique for producing a clad steel sheet, a method based on a rolling method or an explosion deposition method is known. These techniques are methods in which individually manufactured sheet materials are brought into close contact with each other by rolling or explosive force.

【0003】しかしながら上記の方法は、複合される板
材をそれぞれ個別に圧延し製造する必要があり、また複
合させるにも手数が掛かる上にコスト高となり、現在で
はあまり適用されていない。これに代わる技術として、
最近では連続鋳造により直接複層金属材すなわちクラッ
ド鋼板を製造する技術が採用されている。
However, the above-mentioned method needs to be individually rolled to manufacture the plate materials to be composited, and it takes a lot of time and cost to combine the composite materials, so that it is not applied so much at present. As an alternative technology,
Recently, a technique of directly producing a multi-layer metal material, that is, a clad steel plate by continuous casting has been adopted.

【0004】図2はこの技術の一例を示す図面であり、
方形の冷却鋳型11内に長短2本の注入ノズル12a,
12bを浸漬し、該注入ノズルにそれぞれ異種の溶融金
属を注入して湯溜り部13に上下2層の溶融金属層13
a,13bを形成する。
FIG. 2 is a diagram showing an example of this technique.
Two long and short injection nozzles 12a in a rectangular cooling mold 11,
12b is dipped, and different kinds of molten metal are injected into the injection nozzles, respectively, and the molten metal layer 13 of upper and lower two layers is formed in the pool 13.
a and 13b are formed.

【0005】この場合、湯溜り部13の上層側に浸漬さ
れる短い注入ノズル12aからは比較的密度の小さい溶
融金属が注入されて上層の溶融金属層13aを形成し、
下層側に浸漬される長い注入ノズル12bからは密度の
大きい溶融金属が注入されて下層の溶融金属層13bを
形成する。
In this case, molten metal having a relatively low density is injected from a short injection nozzle 12a immersed in the upper layer side of the basin 13 to form an upper molten metal layer 13a,
Molten metal having a high density is injected from a long injection nozzle 12b immersed in the lower layer side to form a lower molten metal layer 13b.

【0006】ここで先ず上層の溶融金属層13aが冷却
鋳型11によって冷却され、外層凝固シェル14aを形
成しながら下方向に引き出され、引き続き外層凝固シェ
ル14aによって冷却された下層の溶融金属層13bが
外層凝固シェル14aの内側に内層凝固シェル14bを
形成し、一体となって下方向に引き出されて複層鋳片1
5となる。
Here, first, the upper molten metal layer 13a is cooled by the cooling mold 11, is drawn downward while forming the outer layer solidified shell 14a, and then the lower molten metal layer 13b is cooled by the outer layer solidified shell 14a. The inner layer solidified shell 14b is formed inside the outer layer solidified shell 14a, and the inner layer solidified shell 14b is integrally pulled out to form a multilayer cast slab 1
It becomes 5.

【0007】[0007]

【発明が解決しようとする課題】ところでこのようにし
て製造される複層鋳片15は、鋳片厚さが100mm以
上の極厚スラブであり、これを実用的なクラッド鋼板と
するには、さらに熱間圧延,冷間圧延等の工程を経由す
る必要があり、多くの工程を経るうえになおコスト高の
問題は解消されない。
By the way, the multi-layer cast slab 15 produced in this manner is an extremely thick slab having a cast thickness of 100 mm or more. To make this a practical clad steel plate, Furthermore, it is necessary to go through processes such as hot rolling and cold rolling, and many problems are involved and the problem of high cost cannot be solved.

【0008】本発明は上記課題に鑑みなされたもので、
薄板鋳片を製造する双ロール式連続鋳造によりクラッド
鋼板を製造する連続鋳造方法を提供する。
The present invention has been made in view of the above problems.
Provided is a continuous casting method for producing a clad steel plate by twin roll type continuous casting for producing a thin plate slab.

【0009】[0009]

【課題を解決するための手段】本発明は、2個のロール
とロールの両端面に設けたサイド堰によって形成される
湯溜り部に長さの異なる2本の注入ノズルを浸漬し、該
注入ノズルにそれぞれ異種の溶融金属を注入して湯溜り
部に上下2層の溶融金属層を形成させ、前記ロールに接
する上層の溶融金属により外層凝固シェルを形成させ、
下層の溶融金属により内層凝固シェルを形成させ、該内
外層の凝固シェルをロールキス点またはその前後にて一
体に複合させてクラッド鋼板を製造することを特徴とす
る双ロールによるクラッド鋼板の連続鋳造方法である。
また本発明においては、上層の溶融金属の密度の方が下
層の溶融金属の密度よりも小さいことが必要である。
According to the present invention, two pouring nozzles having different lengths are immersed in a molten metal pool formed by two rolls and side dams provided on both end faces of the rolls, and the pouring is performed. Injecting different kinds of molten metals into the nozzles to form upper and lower two layers of molten metal in the pool, and forming an outer layer solidified shell by the upper layer of molten metal in contact with the roll,
A continuous casting method for a clad steel sheet by twin rolls, characterized in that an inner layer solidified shell is formed by the molten metal of the lower layer, and the clad steel sheet is manufactured by integrally compounding the solidified shells of the inner and outer layers at or before and after the roll kiss point. Is.
Further, in the present invention, the density of the molten metal in the upper layer needs to be lower than the density of the molten metal in the lower layer.

【0010】[0010]

【作用】本発明は、ベッセマー法として知られている双
ロールによる薄板鋳片の連続鋳造装置において、2個の
ロールとロールの両端面に設けたサイド堰によって形成
される湯溜り部に長さの異なる2本の注入ノズルを浸漬
し、この2本の注入ノズルにそれぞれ異種の溶融金属を
注入して湯溜り部に上下2層の溶融金属層を形成する。
According to the present invention, in a continuous casting apparatus for twin-roll thin plate slabs known as the Bessemer method, the length of the molten metal pool formed by two rolls and side weirs provided at both end faces of the rolls. 2 different injection nozzles are immersed, and different kinds of molten metals are injected into these two injection nozzles to form upper and lower two molten metal layers in the pool.

【0011】この場合、湯溜り部の上層側に浸漬される
短い注入ノズルからは比較的密度の小さい溶融金属が注
入されて上層の溶融金属層を形成し、下層側に浸漬され
る長い注入ノズルからは密度の大きい溶融金属が注入さ
れて下層の溶融金属層を形成する。
In this case, the molten metal having a relatively low density is injected from the short injection nozzle immersed in the upper layer side of the basin to form the upper molten metal layer, and the long injection nozzle immersed in the lower layer side. A molten metal having a high density is injected from the above to form a lower molten metal layer.

【0012】ここで先ず上層の溶融金属層が、ロールに
よって冷却されて外層凝固シェルを形成しながら下方に
誘導され、引き続き形成された外層凝固シェルによって
冷却された下層の溶融金属層が、外層凝固シェルの内側
に内層凝固シェルを形成し、この内外層の凝固シェルは
ロールキス点またはその前後にて一体に複合されて複層
鋳片となり、クラッド鋼板が製造される。
Here, the upper molten metal layer is first guided downward while being cooled by a roll to form an outer layer solidified shell, and the lower molten metal layer cooled by the subsequently formed outer layer solidified shell is then outer layer solidified. An inner layer solidified shell is formed inside the shell, and the solidified shells of the inner and outer layers are integrally compounded at the roll kiss point or before and after the roll kiss point to form a multi-layer cast piece, and a clad steel plate is manufactured.

【0013】ここで注入される溶融金属としては、湯溜
り部における混合を避けるために、上層の溶融金属層す
なわち外層凝固シェルを形成する溶融金属は、内層凝固
シェルを形成する下層の溶融金属よりも密度の小さい金
属とする必要がある。
As the molten metal injected here, the molten metal forming the upper molten metal layer, that is, the outer layer solidified shell is more than the lower layer molten metal forming the inner layer solidified shell in order to avoid mixing in the pool. Also needs to be a metal with a low density.

【0014】[0014]

【実施例】図1は、本発明を実施するに好適なクラッド
鋼板を製造する双ロール式連続鋳造装置の一例を示す側
面図である。
FIG. 1 is a side view showing an example of a twin roll type continuous casting apparatus for producing a clad steel sheet suitable for carrying out the present invention.

【0015】本連続鋳造装置は、2個のロール1とロー
ルの両端面に設けたサイド堰2によって形成される湯溜
り部3に長さの異なる2本の注入ノズル4a,4bを浸
漬して構成され、それぞれ両ノズルより異種の溶融金属
を注入して湯溜り部3に上下2層の溶融金属層3a,3
bを形成する。
In this continuous casting apparatus, two pouring nozzles 4a and 4b having different lengths are immersed in a molten metal pool 3 formed by two rolls 1 and side dams 2 provided on both end faces of the rolls. The molten metal of different types is injected from both nozzles, respectively, and the molten metal layers 3a and 3 of the upper and lower two layers are filled in the pool 3 of the molten metal.
b is formed.

【0016】この場合、湯溜り部3の上層側に浸漬され
る短い注入ノズル4aからは、比較的密度の小さい溶融
金属が注入されて上層の溶融金属層3aを形成し、下層
側に浸漬される長い注入ノズル4bからは、密度の大き
い溶融金属が注入されて下層の溶融金属層3bを形成す
る。
In this case, the molten metal having a relatively low density is injected from the short injection nozzle 4a which is immersed in the upper layer side of the basin 3 to form the upper molten metal layer 3a, which is then immersed in the lower layer side. The molten metal having a high density is injected from the long injection nozzle 4b to form the lower molten metal layer 3b.

【0017】ここで先ず上層の溶融金属層3aがロール
1によって冷却され、湯面と接する凝固開始点5aより
凝固を開始して、外層凝固シェル6aを形成しながら下
方に誘導される。
Here, first, the upper molten metal layer 3a is cooled by the roll 1, starts to solidify from the solidification start point 5a in contact with the molten metal surface, and is guided downward while forming the outer layer solidification shell 6a.

【0018】引き続き形成された外層凝固シェル6aに
よって冷却された下層の溶融金属層3bが、下層溶融金
属層3の湯面が外層凝固シェル6aと接する凝固開始点
5bより凝固を開始してその内側に内層凝固シェル6b
を形成し、この内外層の凝固シェル6a,6bはロール
キス点7またはその前後にて一体に複合されて複層鋳片
8となり、クラッド鋼板が製造される。
The lower molten metal layer 3b cooled by the subsequently formed outer layer solidified shell 6a begins to solidify from the solidification start point 5b at which the molten metal layer 3 of the lower molten metal layer 3 contacts the outer layer solidified shell 6a and the inside thereof. Inner layer solidified shell 6b
The solidified shells 6a and 6b of the inner and outer layers are integrally compounded at the roll kiss point 7 or before and after the roll kiss point 7 to form a multi-layer cast slab 8 to manufacture a clad steel plate.

【0019】このようにして製造されるクラッド鋼板
は、ロールキス点7にてほぼ所定の板厚の薄板複層鋳片
に成形される。従ってこの後さらに熱間圧延等の工程を
経由することはなく、若干の冷間圧延工程のみにて充分
実用に供し得るクラッド鋼板となる。
The clad steel plate manufactured in this manner is formed into a thin-plate multi-layer cast slab having a substantially predetermined plate thickness at the roll kiss point 7. Therefore, the clad steel sheet can be sufficiently put into practical use only after a few cold rolling steps without further steps such as hot rolling.

【0020】[0020]

【発明の効果】以上説明した如く本発明によれば、湯溜
り部に2本の注入ノズルを浸漬し、この注入ノズルにそ
れぞれ異種の溶融金属を注入し、内外層の凝固シェルを
形成してこれを一体に複合させ、直接に溶融金属からク
ラッド鋼板を連続して製造するもので、ロールキス点に
てほぼ所定板厚の薄板複層鋳片が得られ、従って熱間圧
延等の工程を省略することができ、クラッド材の生産性
向上と製造コストの逓減を図り得る。
As described above, according to the present invention, two pouring nozzles are immersed in the molten metal pool, and different kinds of molten metals are injected into the pouring nozzles to form solidified shells for the inner and outer layers. This is an integrated composite that directly produces a clad steel plate from molten metal, and a thin-plate multi-layer slab of approximately the specified plate thickness can be obtained at the roll kiss point, so steps such as hot rolling are omitted. Therefore, the productivity of the clad material can be improved and the manufacturing cost can be gradually reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明を実施するに好適なクラッド鋼板を製造
する双ロール式連続鋳造装置の一例を示す側面図であ
る。
FIG. 1 is a side view showing an example of a twin roll type continuous casting apparatus for producing a clad steel sheet suitable for carrying out the present invention.

【図2】従来のクラッド鋼材を製造する連続鋳造装置の
一例を示す側面図である。
FIG. 2 is a side view showing an example of a conventional continuous casting apparatus for producing a clad steel material.

【符号の説明】[Explanation of symbols]

1 鋳造用のロール 2 サイド堰 3 湯溜り部 3a,3b 溶融金属層 4a,4b 注入ノズル 5a,5b 凝固開始点 6a,6b 凝固シェル 7 ロールキス点 8 複層鋳片 1 Casting roll 2 Side weir 3 Hot water pool 3a, 3b Molten metal layer 4a, 4b Injection nozzle 5a, 5b Solidification start point 6a, 6b Solidification shell 7 Roll kiss point 8 Multi-layer cast piece

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 2個のロールとロールの両端面に設けた
サイド堰によって形成される湯溜り部に長さの異なる2
本の注入ノズルを浸漬し、該注入ノズルにそれぞれ異種
の溶融金属を注入して湯溜り部に上下2層の溶融金属層
を形成させ、前記ロールに接する上層の溶融金属により
外層凝固シェルを形成させ、下層の溶融金属により内層
凝固シェルを形成させ、該内外層の凝固シェルをロール
キス点またはその前後にて一体に複合させてクラッド鋼
板を製造することを特徴とする双ロールによるクラッド
鋼板の連続鋳造方法。
1. A basin formed by two rolls and side weirs provided on both end faces of the rolls has different lengths.
The book injection nozzle is dipped, and different kinds of molten metals are injected into the injection nozzles to form upper and lower two molten metal layers in the pool, and the outer layer solidified shell is formed by the upper molten metal in contact with the roll. And the inner layer solidified shell is formed by the molten metal of the lower layer, and the solidified shell of the inner and outer layers is integrally compounded at or before and after the roll kiss point to produce a clad steel sheet. Casting method.
【請求項2】 上層の溶融金属の密度の方が下層の溶融
金属の密度よりも小さい条件のもとで実施することを特
徴とする請求項1記載の双ロールによるクラッド鋼板の
連続鋳造方法。
2. The continuous casting method for a clad steel plate by twin rolls according to claim 1, wherein the method is carried out under the condition that the density of the molten metal in the upper layer is smaller than the density of the molten metal in the lower layer.
JP10530892A 1992-04-01 1992-04-01 Method for continuously casting clad steel sheet by twin rolls Withdrawn JPH05277659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10530892A JPH05277659A (en) 1992-04-01 1992-04-01 Method for continuously casting clad steel sheet by twin rolls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10530892A JPH05277659A (en) 1992-04-01 1992-04-01 Method for continuously casting clad steel sheet by twin rolls

Publications (1)

Publication Number Publication Date
JPH05277659A true JPH05277659A (en) 1993-10-26

Family

ID=14404081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10530892A Withdrawn JPH05277659A (en) 1992-04-01 1992-04-01 Method for continuously casting clad steel sheet by twin rolls

Country Status (1)

Country Link
JP (1) JPH05277659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104249135A (en) * 2013-06-28 2014-12-31 宝山钢铁股份有限公司 Preparation method for double roller thin strips of clad plate strip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104249135A (en) * 2013-06-28 2014-12-31 宝山钢铁股份有限公司 Preparation method for double roller thin strips of clad plate strip

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A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19990608