JP3380425B2 - Twin drum type continuous casting drum - Google Patents

Twin drum type continuous casting drum

Info

Publication number
JP3380425B2
JP3380425B2 JP09567697A JP9567697A JP3380425B2 JP 3380425 B2 JP3380425 B2 JP 3380425B2 JP 09567697 A JP09567697 A JP 09567697A JP 9567697 A JP9567697 A JP 9567697A JP 3380425 B2 JP3380425 B2 JP 3380425B2
Authority
JP
Japan
Prior art keywords
drum
continuous casting
twin
thin plate
thermal strain
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.)
Expired - Fee Related
Application number
JP09567697A
Other languages
Japanese (ja)
Other versions
JPH10286653A (en
Inventor
達己 齋藤
克芳 高井
貴士 新井
和夫 浜田
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 JP09567697A priority Critical patent/JP3380425B2/en
Publication of JPH10286653A publication Critical patent/JPH10286653A/en
Application granted granted Critical
Publication of JP3380425B2 publication Critical patent/JP3380425B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は、双ドラム式薄板連
続鋳造用ドラムに関し、特に、連続鋳造時に冷却ドラム
の端面とサイド堰との間を潤滑する機構を備えた双ドラ
ム式薄板連続鋳造用ドラムの端面のサイド堰との摺動部
に、耐摩耗性部材と熱歪緩衝部材を交互に配置する双ド
ラム式薄板連続鋳造用ドラムに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twin-drum type thin plate continuous casting drum, and more particularly, to a twin-drum type thin plate continuous casting provided with a mechanism for lubricating an end surface of a cooling drum and a side dam during continuous casting. The present invention relates to a twin-drum type thin plate continuous casting drum in which a wear resistant member and a thermal strain buffering member are alternately arranged on a sliding portion of an end surface of the drum with a side dam.

【0002】[0002]

【従来の技術】近年、溶鋼等の溶融金属から最終形状に
近い数mm程度の厚みを有する薄板を直接的に製造する連
続鋳造方法が注目されている。この場合、従来のような
多段階にわたる熱間圧延工程を必要とせず、また、最終
形状にする圧延も軽度なもので良いため、工程及び設備
の簡略化が図られる。
2. Description of the Related Art In recent years, attention has been focused on a continuous casting method for directly producing a thin plate having a thickness of about several mm close to the final shape from molten metal such as molten steel. In this case, the conventional multi-step hot rolling process is not required, and the rolling to the final shape may be light, so that the process and equipment can be simplified.

【0003】このような連続鋳造法の一つとして、例え
ば、特開昭60−137562号公報で開示された双ド
ラム式薄板連続鋳造方法がある。この方式においては、
図2に示すように、互いに逆方向に回転する一対の冷却
ドラム1a、1b及びサイド堰2a、2bにより区画さ
れた凹部に湯溜まり部3を形成する。タンディシュ等の
容器から注湯ノズルを介して、溶融金属がこの湯溜まり
部3に注湯される。湯溜まり部3に収容された溶融金属
4は、冷却ドラム1a、1bと接する部分が冷却・凝固
して凝固シェルとなる。この凝固シェルは、冷却ドラム
1a、1bの回転に随伴され、一対の冷却ドラム1a、
1bが互いに最も接近した位置で向かい合う、いわゆる
ドラムギャップ部6に移動する。このドラムギャップ部
6では、それぞれの冷却ドラム1a、1bの表面で形成
された凝固シェルが互いに圧着され、目的とする金属薄
帯(薄板)5となる。ここで18は冷却ドラム端面であ
る。
As one of such continuous casting methods, for example, there is a twin-drum type thin plate continuous casting method disclosed in JP-A-60-137562. In this method,
As shown in FIG. 2, a basin 3 is formed in a recess defined by a pair of cooling drums 1a and 1b and side dams 2a and 2b that rotate in opposite directions. Molten metal is poured into this pool 3 from a container such as a tundish via a pouring nozzle. The molten metal 4 contained in the molten metal pool portion 3 is cooled and solidified at the portions in contact with the cooling drums 1a and 1b to become a solidified shell. This solidified shell is accompanied by the rotation of the cooling drums 1a and 1b, and the pair of cooling drums 1a,
1b moves to a so-called drum gap portion 6, which faces each other at a position closest to each other. In the drum gap portion 6, the solidified shells formed on the surfaces of the respective cooling drums 1a and 1b are pressure-bonded to each other to form the target metal ribbon (thin plate) 5. Here, 18 is the end surface of the cooling drum.

【0004】かかる薄板連続鋳造機において、前記サイ
ド堰2a、2bは、一般に、実開昭63−90548号
公報に見られるように、サイド堰ケースに収容された断
熱材と該断熱材に植設されたベース部材と該ベース部材
の冷却ドラムに対応する面に植設されたセラミックスよ
り構成されている。そして、鋳造時は、サイド堰を冷却
ドラム端面に押し付け、上記セラミックスを冷却ドラム
によって摩耗させることによって隙間をなくし、溶鋼洩
れを防止している。また、サイド堰には、特開昭61−
266160号公報に開示されているように、一般に、
振動が与えられており、ドラム端面の損耗をも助長して
いる。
In such a thin plate continuous casting machine, the side dams 2a, 2b are generally installed in the heat insulating material housed in the side dam case and the heat insulating material as seen in Japanese Utility Model Laid-Open No. 63-90548. And a ceramics planted on the surface of the base member corresponding to the cooling drum. At the time of casting, the side dam is pressed against the end surface of the cooling drum, and the ceramics are abraded by the cooling drum to eliminate the gap and prevent leakage of molten steel. Also, in the side weir, JP-A-61-
As disclosed in Japanese Patent No. 266160, in general,
Vibration is applied, which also promotes wear of the drum end surface.

【0005】前記薄板連続鋳造機における冷却ドラム端
面寿命は、冷却ドラムへの溶鋼熱が伝熱によりドラム端
面の摺動部に伝わる熱負荷と、加熱しているサイド堰か
らドラム端面へ伝わる熱負荷に依存するドラム端面被覆
材の損耗速度によって決まる。従って、ドラム端面の耐
熱性を向上させることが、ドラム端面の寿命向上を図る
上で極めて重要である。これまでは、ドラム端面の高温
での摩耗抑制のために、特開平7−284883号公報
や特開平6−5744号公報に開示されているように耐
摩耗性部材が適用されてきている。
The life of the cooling drum end surface in the thin plate continuous casting machine is determined by the heat load of the molten steel heat transferred to the cooling drum to the sliding portion of the drum end surface by heat transfer and the heat load transferred from the heating side dam to the drum end surface. It depends on the wear rate of the drum end surface coating material, which depends on Therefore, it is extremely important to improve the heat resistance of the drum end surface in order to improve the life of the drum end surface. Hitherto, in order to suppress wear of the end surface of the drum at high temperatures, wear resistant members have been applied as disclosed in JP-A-7-284883 and JP-A-6-5744.

【0006】更に、ドラム端面の損耗形態は摩耗だけで
はなく、ドラムの回転に追随して繰り返し加わる溶鋼及
びサイド堰からの熱負荷により表面の被覆材に発生する
熱亀裂及び剥離があると考えられる。したがって、ドラ
ム端面の損耗を抑制するために、冷却ドラムの摺動面に
耐熱衝撃性に優れた被膜を形成することが有効である。
双ドラム式連続鋳造機における溶射被膜の耐熱衝撃性向
上手法は、特開昭59−76645号公報や特開平1−
186245号公報に開示されているように、母材と熱
を受ける被膜の最表層部との間に、熱歪緩衝部材として
メッキ層を入れる等の技術がある。
Further, it is considered that the wear of the drum end surface is not limited to wear, and there are thermal cracks and peeling which occur in the coating material on the surface due to the heat load from the molten steel and the side weirs repeatedly applied following the rotation of the drum. . Therefore, it is effective to form a coating having excellent thermal shock resistance on the sliding surface of the cooling drum in order to suppress wear of the drum end surface.
A method for improving the thermal shock resistance of a sprayed coating in a twin-drum type continuous casting machine is disclosed in JP-A-59-76645 and JP-A-1-.
As disclosed in Japanese Patent No. 186245, there is a technique of inserting a plating layer as a thermal strain buffering member between the base material and the outermost layer of the coating film that receives heat.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、上記特
開平7−284883号公報や特開平6−5744号公
報に示されているドラム端面被覆材では、耐摩耗性は維
持できるが、ドラムの回転に追随して繰り返し加わる溶
鋼及びサイド堰からの熱負荷による表面の被覆材に発生
する熱亀裂及び剥離は抑制できない。すなわち、ドラム
端面の損耗形態は摩耗だけではなく、熱負荷による亀裂
剥離も考慮する必要がある。また、上記特開昭59−7
6645号公報や特開平1−186245号公報に開示
されているような母材と表層材との間の熱歪緩衝部材と
してのメッキ層だけでは、摺動面の最表層部で発生する
熱歪が大きく、被膜に発生する熱亀裂及び剥離を回避す
ることはできない。
However, with the drum end surface coating materials disclosed in the above-mentioned JP-A-7-284883 and JP-A-6-5744, the wear resistance can be maintained, but the rotation of the drum does not occur. It is not possible to suppress thermal cracks and peeling that occur in the coating material on the surface due to the heat load from the molten steel and the side weir that are repeatedly added. That is, it is necessary to consider not only the wear of the drum end surface but also the crack separation due to the heat load. In addition, the above-mentioned JP-A-59-7
The thermal strain generated in the outermost surface layer portion of the sliding surface is only caused by the plating layer as the thermal strain buffering member between the base material and the surface layer material as disclosed in Japanese Patent No. 6645 and Japanese Patent Application Laid-Open No. 1-186245. Is large, and thermal cracking and peeling that occur in the coating cannot be avoided.

【0008】そこで、本発明は、このような問題を有利
に解決し、安定した長時間の鋳造を可能にする双ドラム
式薄板連続鋳造用ドラムを提供することを目的とするも
のである。
Therefore, an object of the present invention is to provide a twin-drum type thin plate continuous casting drum which advantageously solves such a problem and enables stable long-term casting.

【0009】[0009]

【課題を解決するための手段】本発明の要旨は、(1)
一対の冷却ドラムとサイド堰との間に形成した湯溜ま
り部に溶融金属を注入し、ついで該溶融金属を前記冷却
ドラムの回転周面で冷却、凝固させながら薄板を連続鋳
造する双ドラム式薄板連続鋳造用ドラムであって、ドラ
ム端面のサイド堰との摺動部にNiメッキしその上層に
厚さ10〜50μmの保護被膜を形成する双ドラム式薄
板連続鋳造用ドラムにおいて、前記保護被膜として、耐
摩耗性部材と熱歪緩衝部材とを円周方向で交互に0.1
〜0.5mmのピッチで配置することを特徴とする双ドラ
ム式薄板連続鋳造用ドラム、(2) 前記熱歪緩衝部材
の線膨張係数がNiの線膨張係数との比で0.7〜1.
4であることを特徴とする上記(1)に記載の双ドラム
式薄板連続鋳造用ドラム、(3) 前記熱歪緩衝部材の
成分が不可避的不純物を除きNiであることを特徴とす
る上記(1)または(2)に記載の双ドラム式薄板連続
鋳造用ドラム、(4) 前記熱歪緩衝部材の成分がCr
=15〜25%で残部Ni及び不可避的不純物であるこ
とを特徴とする上記(1)または(2)に記載の双ドラ
ム式薄板連続鋳造用ドラム、(5) 前記熱歪緩衝部材
の成分が不可避的不純物を除きCoCrAlYであるこ
とを特徴とする上記(1)または(2)に記載の双ドラ
ム式薄板連続鋳造用ドラム、(6) 前記熱歪緩衝部材
の成分が不可避的不純物を除きCoNiCrAlYであ
ることを特徴とする上記(1)または(2)に記載の双
ドラム式薄板連続鋳造用ドラム、である。
The gist of the present invention is (1)
A twin-drum type thin plate for continuously casting a thin plate while injecting molten metal into a molten metal pool formed between a pair of cooling drums and side dams and then cooling and solidifying the molten metal on the rotating peripheral surface of the cooling drum. A continuous casting drum, which is a twin-drum type thin plate continuous casting drum in which a sliding portion of an end surface of the drum with a side dam is plated with Ni to form a protective coating having a thickness of 10 to 50 μm, , The wear resistant member and the thermal strain buffering member are alternately arranged in the circumferential direction by 0.1.
A twin-drum type thin plate continuous casting drum, characterized in that they are arranged at a pitch of 0.5 mm, (2) the linear expansion coefficient of the thermal strain buffering member is 0.7 to 1 in ratio with the linear expansion coefficient of Ni .
4. The twin-drum type thin plate continuous casting drum as described in (1) above, wherein (3) the component of the thermal strain buffering member is Ni except for unavoidable impurities. 1) The twin-drum type thin plate continuous casting drum according to 2), or 4) The component of the thermal strain buffering member is Cr.
= 15-25%, the balance being Ni and unavoidable impurities, and the twin drum type thin plate continuous casting drum according to (1) or (2) above, (5) wherein the component of the thermal strain buffering member is (2) The twin-drum type thin plate continuous casting drum according to (1) or (2) above, wherein CoCrCrY is used to remove inevitable impurities, and (6) The component of the thermal strain buffering member is CoNiCrAlY except for inevitable impurities. The twin-drum type thin plate continuous casting drum according to (1) or (2) above.

【0010】[0010]

【発明の実施の形態】以下、本発明を図面に基づいて詳
細に説明する。先ず、本発明で用いる双ドラム式薄板連
続鋳造用ドラムについて図1、図2により説明する。ド
ラム端面の構造は、サイド堰に向けて所定の幅(摺動
幅)を持ってドラム軸方向にリング状に突出した形状に
なっており、突出した部分がサイド堰と摺動する。その
摺動部の円周方向に、摺動幅のセンターライン上で、
0.1〜0.5mmピッチで耐摩耗性部材7と熱歪緩衝部
材8が交互に配置されるように溶射施工する。耐摩耗性
部材7と熱歪緩衝部材8との施工ピッチが0.1mm未満
では、耐摩耗性部材の母材への密着強度が確保できず、
摺動時の機械的負荷により被膜が剥離する。また、0.
5mmを越えると耐摩耗性部材内部での熱歪が大きくな
り、熱亀裂や剥離の発生に至ってしまう。特に、溶射施
工時に被膜の品質安定性を確保するためには、施工ピッ
チは、0.3mm以上、0.5mm以下が望ましい。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings. First, the twin-drum type thin plate continuous casting drum used in the present invention will be described with reference to FIGS. The structure of the drum end surface has a shape protruding in a ring shape in the drum axial direction with a predetermined width (sliding width) toward the side dam, and the protruding portion slides on the side dam. In the circumferential direction of the sliding part, on the center line of the sliding width,
Thermal spraying is performed so that the wear resistant members 7 and the thermal strain buffering members 8 are alternately arranged at a pitch of 0.1 to 0.5 mm. If the construction pitch of the wear resistant member 7 and the thermal strain buffering member 8 is less than 0.1 mm, the adhesion strength of the wear resistant member to the base material cannot be secured,
The coating peels off due to mechanical load during sliding. Also, 0.
If it exceeds 5 mm, the thermal strain inside the wear resistant member becomes large, resulting in the occurrence of thermal cracks and peeling. In particular, in order to ensure the quality stability of the coating during thermal spraying, the working pitch is preferably 0.3 mm or more and 0.5 mm or less.

【0011】また、耐摩耗性部材と熱歪緩衝部材のピッ
チを不等ピッチとする場合は、耐摩耗性部材と熱歪緩衝
部材の比率が2:1を越えると緩衝能力が不足するた
め、該比率を2:1以下にすることが望ましい。
When the wear resistant member and the thermal strain buffering member have unequal pitches, if the ratio between the wear resistant member and the thermal strain buffering member exceeds 2: 1, the buffering capacity becomes insufficient. It is desirable that the ratio be 2: 1 or less.

【0012】熱歪緩衝部材の線膨張係数は、Niの線膨
張係数の0.7倍未満では熱歪緩衝能力が無く熱亀裂が
生じてしまう。また、線膨張係数がNiの線膨張係数の
1.4倍を越えると、熱歪緩衝部材の熱による膨張と収
縮が大きく逆に熱亀裂が発生してしまうため、熱歪緩衝
部材の線膨張係数がNiの線膨張係数との比で0.7〜
1.4とする。
If the linear expansion coefficient of the thermal strain buffering member is less than 0.7 times the linear expansion coefficient of Ni, the thermal strain buffering ability will be lost and thermal cracking will occur. Further, when the linear expansion coefficient exceeds 1.4 times the linear expansion coefficient of Ni, expansion and contraction due to heat of the thermal strain buffering member are large, and conversely thermal cracking occurs, so that the linear expansion of the thermal strain buffering member. The coefficient is 0.7 to the ratio with the linear expansion coefficient of Ni.
Set to 1.4.

【0013】熱歪緩衝部材として、Niは、単独では耐
摩耗性が不足するが、それを耐摩耗性部材で補うことが
でき、かつ母材と同材質(線膨張係数)であるため、好
ましい材料である。
As a thermal strain buffer member, Ni is insufficient in wear resistance by itself, but it can be supplemented by a wear resistant member and is the same material as the base material (coefficient of linear expansion), which is preferable. It is a material.

【0014】また、熱歪緩衝部材としてのCrとNiの
合金成分は、Cr=15〜25%とする。Crの成分比
率が25%を超えると熱衝撃性が低下して、被膜の割れ
を引き起こし、一方、15%未満のCr含有率では、N
iよりも優れた耐摩耗性向上効果を発揮できないためで
ある。
The alloy component of Cr and Ni as the thermal strain buffering member is Cr = 15 to 25%. If the Cr component ratio exceeds 25%, the thermal shock resistance deteriorates, causing cracking of the coating film, while if the Cr content ratio is less than 15%, N
This is because it is not possible to exert the wear resistance improving effect superior to that of i.

【0015】また、CoCrAlY、CoNiCrAl
Yは、熱遮蔽性被膜として用いられ、熱歪緩衝機能を有
し且つ母材との密着性向上機能をも有するため、本発明
の熱歪緩衝部材として好ましい合金である。AlやCo
等の金属は、更に耐熱性を向上させる目的で添加され
る。また、合金化することで、耐摩耗性もNiと比べて
向上させることが可能である。歪の発生する方向性や材
料の熱による軟化特性を考慮すれば、さらに熱歪の緩衝
効果を高めることができる。
Further, CoCrAlY, CoNiCrAl
Y is used as a heat-shielding film, has a thermal strain buffering function, and also has an adhesiveness improving function with the base material, and is therefore a preferable alloy for the thermal strain buffering member of the present invention. Al and Co
Metals such as are added for the purpose of further improving heat resistance. Further, by alloying, wear resistance can be improved as compared with Ni. Considering the directionality in which strain occurs and the softening characteristics of the material due to heat, the buffer effect of thermal strain can be further enhanced.

【0016】耐摩耗性部材としては、本発明では特に限
定するものではなく、従来技術のWC系やCo−Cr−
Al−Y系、Co−Mo−Cr−Si系などの溶射コー
ティング材を適宜選択し、使用できる。なお、本発明
は、ドラム式連続鋳造機でサイド堰をドラム端部に押し
付ける構造のものならば、形式を問わず有効である。
The wear resistant member is not particularly limited in the present invention, and the conventional WC system or Co--Cr--
A thermal spray coating material such as an Al-Y system or a Co-Mo-Cr-Si system can be appropriately selected and used. The present invention is effective regardless of the type as long as it has a structure in which the side weir is pressed against the drum end portion by the drum type continuous casting machine.

【0017】[0017]

【実施例】本発明と比較例を用いて鋳造試験を実施し
た。試験条件及び結果を表1に示す。従来の熱緩衝部材
を適用しないケースと本発明の比較を試験No.1と3
により行った。また、耐摩耗性部材と熱歪緩衝部材のピ
ッチを本発明範囲内とそれ以外の場合の比較を試験N
o.2、3及び4により行った。また、材質を変えた場
合の本発明の有効性も併せて試験No.5、6、7によ
り確認した。
EXAMPLES Casting tests were carried out using the present invention and comparative examples. The test conditions and results are shown in Table 1. The comparison between the case where the conventional heat buffer member is not applied and the present invention is Test No. 1 and 3
Went by. In addition, the pitch of the wear-resistant member and the heat-strain buffering member was compared within the range of the present invention and in other cases.
o. 2, 3 and 4. In addition, the effectiveness of the present invention when the material is changed is also shown in Test No. Confirmed by 5, 6, and 7.

【0018】試験結果を鋳造量と単位面積当たりの亀裂
発生状況の関係として整理し、図3に示した。本発明例
では、いずれもドラム端面の熱による損耗が抑制されて
長時間安定した溶鋼シールが確保できることが確認でき
た。
The test results are summarized as a relationship between the casting amount and the crack generation state per unit area and are shown in FIG. In each of the examples of the present invention, it was confirmed that wear of the drum end surface due to heat was suppressed and a stable molten steel seal could be secured for a long time.

【0019】[0019]

【表1】 [Table 1]

【0020】[0020]

【発明の効果】以上詳述したように、本発明により、ド
ラム端面の熱亀裂による損耗がなく、安定した長時間の
鋳造を行うことができるため、本発明は、工業的に価値
の高い発明であると言える。
As described in detail above, according to the present invention, there is no wear due to thermal cracks on the end surface of the drum, and stable casting can be performed for a long time. Therefore, the present invention is an industrially valuable invention. Can be said to be

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

【図1】本発明のドラム端面の概略を模式的に説明する
図である。
FIG. 1 is a diagram schematically illustrating an outline of a drum end surface of the present invention.

【図2】双ドラム式薄板連続鋳造法の概略を斜視図で模
式的に示す図である。
FIG. 2 is a perspective view schematically showing an outline of a twin-drum type thin plate continuous casting method.

【図3】本発明を適用したときの鋳造量と熱亀裂の発生
量の関係を示す図である。
FIG. 3 is a diagram showing a relationship between a casting amount and a thermal crack generation amount when the present invention is applied.

【符号の説明】[Explanation of symbols]

1a、1b 冷却ドラム 2a、2b サイド堰 3 湯溜まり部 4 溶融金属 5 金属薄帯 6 ドラムギャップ部 7 耐摩耗性部材 8 熱歪緩衝部材 1a, 1b Cooling drum 2a, 2b Side weir 3 Hot water pool 4 Molten metal 5 Metal ribbon 6 Drum gap part 7 Wear resistant members 8 Thermal strain buffer

───────────────────────────────────────────────────── フロントページの続き (72)発明者 浜田 和夫 山口県光市大字島田3434番地 新日本製 鐵株式会社 光製鐵所内 (56)参考文献 特開 平7−284883(JP,A) 特開 平6−335751(JP,A) 特開 平6−126390(JP,A) 特開 昭60−137562(JP,A) 特開 昭61−266160(JP,A) 特開 昭59−76645(JP,A) 特開 平3−118945(JP,A) 特開 昭64−66049(JP,A) 実開 昭63−90548(JP,U) 実開 平6−5744(JP,U) (58)調査した分野(Int.Cl.7,DB名) B22D 11/06 330 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuo Hamada Inventor, Kazuo Hamada 3434 Shimada, Hikari City, Yamaguchi Pref., Nippon Steel Corp. Hikari Works (56) Reference JP-A-7-284883 (JP, A) JP 6-335751 (JP, A) JP 6-126390 (JP, A) JP 60-137562 (JP, A) JP 61-266160 (JP, A) JP 59-76645 (JP , A) JP-A-3-118945 (JP, A) JP-A-64-66049 (JP, A) Actually open 63-90548 (JP, U) Actually open flat 6-5744 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) B22D 11/06 330

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 一対の冷却ドラムとサイド堰との間に形
成した湯溜まり部に溶融金属を注入し、ついで該溶融金
属を前記冷却ドラムの回転周面で冷却、凝固させながら
薄板を連続鋳造する双ドラム式薄板連続鋳造用ドラムで
あって、ドラム端面のサイド堰との摺動部にNiメッキ
しその上層に厚さ10〜50μmの保護被膜を形成する
双ドラム式薄板連続鋳造用ドラムにおいて、前記保護被
膜として、耐摩耗性部材と熱歪緩衝部材とを円周方向で
交互に0.1〜0.5mmのピッチで配置することを特徴
とする双ドラム式薄板連続鋳造用ドラム。
1. A thin plate is continuously cast while pouring molten metal into a molten metal pool formed between a pair of cooling drums and side dams, and then cooling and solidifying the molten metal on the rotating peripheral surface of the cooling drum. A twin-drum type continuous casting drum for thin plate continuous casting, in which a sliding portion of the end face of the drum with a side dam is plated with Ni and a protective coating having a thickness of 10 to 50 μm is formed on the Ni plating. A twin-drum type thin plate continuous casting drum, characterized in that, as the protective coating, wear-resistant members and thermal strain buffering members are alternately arranged in a circumferential direction at a pitch of 0.1 to 0.5 mm.
【請求項2】 前記熱歪緩衝部材の線膨張係数がNiの
線膨張係数との比で0.7〜1.4であることを特徴と
する請求項1記載の双ドラム式薄板連続鋳造用ドラム。
2. The twin-drum type thin plate continuous casting according to claim 1, wherein the linear expansion coefficient of the thermal strain buffering member is 0.7 to 1.4 in ratio with the linear expansion coefficient of Ni. drum.
【請求項3】 前記熱歪緩衝部材の成分が不可避的不純
物を除きNiであることを特徴とする請求項1または2
記載の双ドラム式薄板連続鋳造用ドラム。
3. The component of the thermal strain buffering member is Ni, except for inevitable impurities, and is Ni.
A twin-drum type thin plate continuous casting drum as described above.
【請求項4】 前記熱歪緩衝部材の成分がCr=15〜
25%で残部Ni及び不可避的不純物であることを特徴
とする請求項1または2記載の双ドラム式薄板連続鋳造
用ドラム。
4. The component of the thermal strain buffering member is Cr = 15 to
The twin drum type continuous casting drum according to claim 1 or 2, wherein the balance is Ni and inevitable impurities at 25%.
【請求項5】 前記熱歪緩衝部材の成分が不可避的不純
物を除きCoCrAlYであることを特徴とする請求項
1または2記載の双ドラム式薄板連続鋳造用ドラム。
5. The twin-drum type thin plate continuous casting drum according to claim 1, wherein the component of the thermal strain buffering member is CoCrAlY except for inevitable impurities.
【請求項6】 前記熱歪緩衝部材の成分が不可避的不純
物を除きCoNiCrAlYであることを特徴とする請
求項1または2記載の双ドラム式薄板連続鋳造用ドラ
ム。
6. The twin-drum type thin plate continuous casting drum according to claim 1, wherein the component of the thermal strain buffering member is CoNiCrAlY except for inevitable impurities.
JP09567697A 1997-04-14 1997-04-14 Twin drum type continuous casting drum Expired - Fee Related JP3380425B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09567697A JP3380425B2 (en) 1997-04-14 1997-04-14 Twin drum type continuous casting drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09567697A JP3380425B2 (en) 1997-04-14 1997-04-14 Twin drum type continuous casting drum

Publications (2)

Publication Number Publication Date
JPH10286653A JPH10286653A (en) 1998-10-27
JP3380425B2 true JP3380425B2 (en) 2003-02-24

Family

ID=14144114

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09567697A Expired - Fee Related JP3380425B2 (en) 1997-04-14 1997-04-14 Twin drum type continuous casting drum

Country Status (1)

Country Link
JP (1) JP3380425B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100388031B1 (en) * 1998-12-21 2003-11-10 주식회사 포스코 Casting roll coating method of twin roll sheet casting machine

Also Published As

Publication number Publication date
JPH10286653A (en) 1998-10-27

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