JPS62114773A - Manufacture of water cooling plate for continuous casting - Google Patents

Abstract

PURPOSE:To improve the yield strength against the generation of a crack in the vicinity of the plate thickness center of both sides of a weld zone, and an erosion and a corrosion, by cutting out all of a groove part and a watercourse use cavity part from a steel plate, and thereafter, forming as one body an interval material between steel plates, and a watercourse part. CONSTITUTION:In both side corner parts in the width direction of steel plates 1a, 1b, a space groove part 2 whose size depth d1 is roughly equal to a plate thickness is cut extending from the side face of the steel plate to the center part in the width direction of the steel plate. Between both the space groove parts 2, 2, a cavity groove 6 is grooved and worked, and between the cavity part 6 and the space groove part 2, a projecting line part 7 is formed. Subsequently, both the steel plates 1a, 1b are superposed in a state that both the projecting line parts 7, 7 are butted through touch areas 4, 4. Next,the opposed space groove parts 2, 2 are formed as one body by performing a complete penetration welding 8, and a watercourse 9 for cooling is formed by the cavity grooves 6, 6. Also, the watercourse end part in the longitudinal direction of this one body object is welded to a choked state, and thereafter, a stress relief annealing working, a circular arc bending working, and a machine cutting working are performed, and a water cooling plate is formed by attaching accessory parts.

Description

【発明の詳細な説明】 （産業上の利用分身） 本発明は、連続鋳造設備において、鋳型面−ドに位置し
、かつ凝固した鋳片を両面から挟むようにして引抜くウ
オーキングバーを取付けるための弯曲された水冷板の製
作方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention is directed to a continuous casting equipment, in which a curved walking bar is installed, which is located on the mold surface and pulls out a solidified slab by sandwiching it from both sides. The present invention relates to a method of manufacturing a water-cooled plate.

（ｆ＆来の技術） 一般に連続鋳造設備のウオーキングバーは、ド側即ちｎ
　＋ｆｌｌ″１１径の大きい基準側と、１−１側の湾曲
１１径の小さい反基準側に、それぞれ１０〜１３枚の水
冷板が取付けられており、１枚の水冷板は厚さ５５〜６
５ｍｍ、幅１６０〜１８０１ＩＩｍ１円弧の長さ２３０
０〜４２００ｉ而、円弧曲率が゛１′径約１０ｍＲとさ
れている。(F & previous technology) In general, the walking bar of continuous casting equipment is
10 to 13 water-cooled plates are installed on the reference side with a large diameter of +fll''11 and the anti-reference side with a small diameter of curved 11 on the 1-1 side, and each water-cooled plate has a thickness of 55 to 6.
5mm, width 160~1801IIm1 arc length 230
0 to 4200i, the arc curvature is approximately 10 mR in diameter.

ところで、この水冷板の製作には、短冊状をした２枚の
鋼板と、断面がＩＦ方形で一辺が１２〜１６１１Ｉｌの
角鋼を２木用意し、２枚の鋼板を１２〜１６１の対向間
隙を設けて市ね合わせ、該間隙の長丁一方向全長に−１
−記角鋼を鋼板側端縁より７鰭曳まった品位に仮付は溶
接したのち、該角鋼外側の深さＴ　ｆｆｌＪ幅１２〜１
６ｆｆｉＩＩ＋の空間開先部を両側とも全長溶接する方
法が長年にわたり採用されてきた（発明か解決しようと
する問題点） しかし、１・記従来方法により（１ｊられる水冷板は）
、命が短く、かつ製品ごとに品質のばらつきがあって、
短い使用期間でも水もれｌ・ラブルが発生する等の欠点
があった。また、Ｌ配水冷板はその組＼ｆで溶接後に厚
さ方向、幅方向とも四面全長にわたり機械切削し、曲げ
加■−を施すが、その際に溶接部に微細なりラックが発
生することがある等の欠陥を生じていた。By the way, in order to manufacture this water-cooled plate, we prepared two rectangular steel plates and two square steel pieces with an IF square cross section and a side of 12 to 1611 Il. Provided and aligned, the total length of the gap in one direction is -1
- After temporarily welding the square steel to a level that extends 7 fins from the edge of the steel plate, the depth of the outside of the square steel is T fflJ width 12 to 1
The method of welding the entire length of the space groove on both sides of 6ffiII+ has been adopted for many years (problem to be solved by invention) However, by the conventional method (1), the water-cooled plate is
, lifespan is short, and quality varies from product to product.
There were drawbacks such as water leakage and problems even after a short period of use. In addition, after welding the L water distribution cold plate as a set, it is mechanically cut over the entire length on all four sides in both the thickness and width directions, and is subjected to bending. There were some defects.

従って本発明は高寿命、一定品質の水冷板の製作方法を
提供するものである。Accordingly, the present invention provides a method for manufacturing a water-cooled plate with a long life and constant quality.

（問題点を解決するための手段） 本発明は、２枚の短冊状鋼板のいずれか一方、もしくは
双方の鋼板重ね合わせ面側両側角部に、空間開先部を切
欠形成し、かつ両側開先部の間を溝掘り加ｆして空胴溝
を設け、両鋼板の重ね合わせ後に突合わせ開先部を完全
溶込み溶接して一体化すると共に、両温板間に１−配字
胴溝による冷却用水路を形成し、次にこの水路両端を閉
塞し、しかして応力除去焼鈍用［、円弧状曲げ加圧、機
械切削加に等を施す連続鋳造用水冷板の製作方法を特徴
とする。(Means for Solving the Problems) The present invention is characterized in that space grooves are formed in both corner portions of one or both of two strip-shaped steel plates on the overlapping surface side, and both sides are opened. A cavity groove is created by digging a groove between the two hot plates, and after the two steel plates are overlaid, the butt grooves are fully penetrated and welded to integrate, and a 1-shaped cylinder is formed between the two hot plates. A method of manufacturing a water-cooled plate for continuous casting is characterized by forming a cooling channel with a groove, then closing both ends of the channel, and subjecting the plate to stress relief annealing, arcuate bending, pressurization, mechanical cutting, etc. .

（作用） 本発明は、従来法のように角鋼を間隔材とじて介入し、
かつ溶接するのではなく、刺抜自体から開先部および水
路用空胴部分を全て削り出して鋼板間の間隔材及び水路
部を・体に形成するから、溶接部両側の板厚中央付近で
の亀裂発生やエロージゴン、コロ−ジョンに対して耐力
向ト、の作用を発揮できる。(Function) The present invention intervenes by closing the square steel as a spacer as in the conventional method,
In addition, instead of welding, the groove part and the hollow part for the waterway are all cut out from the punch itself to form the spacer between the steel plates and the waterway part. It can exert a force-resistant effect against cracking, erosion, and corrosion.

（実施例） 以下、本発明の一実施例を図面を用いて説明する。(Example) An embodiment of the present invention will be described below with reference to the drawings.

第１図において、（Ｉ）に示す如く短冊状をした２枚の
鋼板（ｔａＨＩｂ）に従来よりも５〜１５−ｍ厚［１の
ものを用い、これら鋼板（ＩａＨｌｂ）の幅方向両側角
部に鋼板側面から鋼板幅方向中央部に向けて板厚とほぼ
等しい・Ｊ−法深さくｄｔ　　）の空ＩＦｎ開先部（２
）を切削しくｎ）かつ雨空間開先部（２）（２）の間に
は、開先底部（３）に接するか、または若ｆ゛のタッチ
エリア（４）を重ね合わせ面側に残して、滑らかな４分
の１円弧消曲（５）で始まる空胴溝（６）を溝掘り加−
ｒ−Ｌ（ＩＩＩ）、空胴溝（６）と空間開先部（２）と
の間に先細まりとなる突条部（７）を形成する。In Fig. 1, as shown in (I), two strip-shaped steel plates (taHIb) with a thickness of 5 to 15 m [1] are used, and both corners of these steel plates (IaHlb) in the width direction are From the side of the steel plate to the center in the width direction of the steel plate, an empty IFn groove (2
) is cut n) and between the rain space groove parts (2) (2), a touch area (4) that touches the groove bottom (3) or is left on the overlapping surface side. Then, dig a cavity groove (6) starting with a smooth quarter-circular curve (5).
r-L (III), a tapered protrusion (7) is formed between the cavity groove (6) and the space groove (2).

次に両鋼板（Ｉａ）（ｌｂ）を両者の突条部（７Ｈ７）
がタッチエリア（４）（４）を介し突合わさる状態に重
ね合わせ（■）、対向する空間開先部（２）（２）に全
長にわたり完全溶込み溶接（８）を施して一体化しく■
）、冷却用の水路（９）を１−配字胴溝（６）（６）に
て形成する。さらに、この・体物の長手方向の水路端部
を本質的に閉塞状態となるように溶接した後、周知の応
力除去焼鈍加工、円弧状曲げ加工、機械切削加工を施し
、附属部品を゛取付けて水冷板とする。Next, attach both steel plates (Ia) (lb) to the protruding portions (7H7) of both.
are overlapped (■) so that they butt against each other through the touch areas (4) (4), and complete penetration welding (8) is performed over the entire length of the opposing space grooves (2) (2) to integrate them.■
), cooling water channels (9) are formed with 1-arranged trunk grooves (6) (6). Furthermore, after welding the waterway ends in the longitudinal direction of this body so that they are essentially closed, well-known stress relief annealing, arc bending, and mechanical cutting are performed, and accessory parts are attached. and use it as a water-cooled plate.

しかして、本発明法では、前述の１１ｎ先深さくｄｔ）
は実験によれば１２〜２５　、、の範囲と限定するのが
最適のようである。何故なら１２ｆｆｉ１１以上にしな
いと、溶接後の曲げ加■二で微細なりラックが発生しや
すくなること、また機械切削では最低２■の削り代は絶
対的７安条件であるからａ効のど厚１０關以１−を確保
するためには、１２龍未満では満足できなくなる。一方
、２５ｍｍを越え極端に大きくとると、ルートクラック
が発生しやすくなり、歪や残留応力の発生も人となるの
でかんばしくない。また、タッチエリア（４）は、通常
０．５〜５　ｍｍあれば完全溶込み溶接が１１能となり
、開先精度、製でＩ；作業性、収縮変形の品質の３点に
おいてベスト条件である。さらに、開先裏面の円弧湾曲
（５）は半径５〜１０■が最適であり、その１−ド限を
逸脱する場合は、水冷板の寿命が大幅によくならないの
である。However, in the method of the present invention, the above-mentioned 11n depth dt)
According to experiments, it seems optimal to limit it to a range of 12 to 25. This is because if the thickness is not 12ffi11 or higher, fine racks are likely to occur during bending after welding, and in mechanical cutting, a minimum cutting allowance of 2mm is an absolute minimum requirement, so the a-effective throat thickness should be 10mm. In order to secure a rank of 1-, less than 12 dragons will be unsatisfactory. On the other hand, if it is extremely large beyond 25 mm, root cracks are likely to occur, and distortion and residual stress are also generated, which is not good. In addition, if the touch area (4) is normally 0.5 to 5 mm, full penetration welding will be possible, and it will be the best condition in three points: groove precision, product quality, workability, and shrinkage deformation quality. . Furthermore, the optimum radius of the arcuate curve (5) on the back surface of the groove is 5 to 10 square meters, and if it deviates from the 1-degree limit, the life of the water-cooled plate will not be significantly improved.

次に本発明のより具体的な製作数値を一例として示すと
、２枚の鋼板（ｌａ）（Ｉｂ）に、板厚２８龍と７０１
のＡＩ、Ｔｉ、Ｎｂ添加のＣ：０．０８、Ｍｎ：０．０
９、Ｓｉ：０．２５程度のキルド材４２　Ｋｇ／ｍｍ”
級の？Ｙ通鋼板を用い、開先角度２０゜、深さｔｅ、、
開先底部のＲ＝　４　ｍｍ、開先裏面側水路のＲ＝６．
５．、、水路のサイズ１３ｘ１２９ｍｍ、タッチエリア
４關とし、溶接はワイヤにＭＧ−５０１、，２，１＋ｌ
φを用いる炭酸ガスアーク溶接にて、電流２２０〜２８
ＯＡ、電圧２４〜３０Ｖの条件で族１−１長り方向両端
に４周部而取りした鋼板をはめ込んで閉塞溶接し、応力
除去焼鈍の目的から６５０±２５°Ｃで２時間キープ、
あと炉冷する。ＰＷＨＴを行い、プラノミラーにより、
全体の厚さ６０ｍｆｆ１．全幅１６９關、（全長は約４
０００ｍｍ）に機械切削したあと、曲率約１０ｍＲに曲
げ加−［し、仕１・、加１−を経て附属品数付加■ユに
て完成させる。Next, to show more specific production values of the present invention as an example, two steel plates (la) and (Ib) with plate thicknesses of 28 dragon and 701
of AI, Ti, and Nb added C: 0.08, Mn: 0.0
9.Si: Killed material of about 0.25 42 Kg/mm”
Class? Using Y steel plate, groove angle 20°, depth te,...
R of the bottom of the groove = 4 mm, R of the channel on the back side of the groove = 6.
5. ,,The size of the waterway is 13x129mm, the touch area is 4 points, and the welding is done using MG-501, 2, 1+l on the wire.
In carbon dioxide arc welding using φ, the current is 220 to 28
Under the conditions of OA and voltage of 24 to 30 V, a steel plate with four circumferences cut out at both ends of Group 1-1 in the longitudinal direction was inserted and closed welded, and kept at 650 ± 25 ° C for 2 hours for the purpose of stress relief annealing.
Then cool it down in the oven. Perform PWHT and plano mirror,
Total thickness 60mff1. The total width is 169 cm, (the total length is approximately 4
000mm), then bending to a curvature of approximately 10mR, finishing 1, adding 1, and adding a number of accessories to complete the process.

本発明による連続鋳造用水冷板の製作方法は、従来の製
法即ち１４ｍの角材を用い、開先深さを７１となるよう
な部位に配設し、開先部及び水路の機械切削を施さない
方式による水冷板に対し、寿命は２〜５倍となり、水洩
れｉ拝故の発生件数も数分の１と数片向−卜する、いわ
ゆる高いレベルでの安定した品質が得られる。The manufacturing method of the water-cooled plate for continuous casting according to the present invention is to use the conventional manufacturing method, that is, to use 14 m square timbers, to arrange the grooves at a portion with a groove depth of 71 mm, and to avoid mechanical cutting of the grooves and water channels. Compared to water-cooled plates using this method, the service life is 2 to 5 times longer, and the number of water leaks and failures is reduced to a fraction of that of other water-cooled plates, resulting in a so-called high level of stable quality.

本発明は勿論、エロージョン、コロ−ジョン耐性向１・
、の策として、肉盛、溶接、溶射、メ・ｙキ、特殊ペイ
ント塗装、力ロライジング、Ｎｉ電首、スーパーアロイ
のはりつけなどをル後の表面加工処理として、必要に応
じ、これらの一種又複合にて適宜選択使用するならば、
その作用効果は増大するものである。Of course, the present invention also improves erosion and corrosion resistance.
As a measure, we can perform surface processing such as overlay, welding, thermal spraying, metal coating, special paint, force rolling, Ni electrical head, super alloy gluing, etc. as necessary. Also, if you select and use it in combination,
Its effects will increase.

水冷板の厚さ力量の収縮変形抵抗を意識して劣弱化させ
るために、角材をスペーサーとして使用しない水冷板の
製法を生みたしたのが本発明であり、その作用として、
変形しやすいという弊害を出すことによって、腐食減肉
寿命を著しく伸ばすため溶接部の厚さ方向応力レベルを
低ドさせたのである。The present invention has created a manufacturing method for water-cooled plates that does not use square timbers as spacers in order to weaken the water-cooled plates with consideration for shrinkage and deformation resistance of the thickness of the plates.
By eliminating the problem of easy deformation, the stress level in the thickness direction of the welded part was lowered in order to significantly extend the corrosion thinning life.

一方、溶接部裏側の水路形成部として、滑らかな円弧湾
曲（５）ではじまる切削加工溝を設ける理由、根拠は製
作時の曲げ加工外力や使用時の熱応力に応じての順応性
、追従性、緩衝性を改り向ｌ−せしめる作用を発揮せし
めることが、この種、連続鋳造のウオーキングバー設備
の水冷板特有の長寿北東となるからである。On the other hand, the reason for providing a cut groove that starts with a smooth circular arc curve (5) as a water channel forming part on the back side of the weld is based on adaptability and followability according to external bending force during manufacturing and thermal stress during use. This is because exhibiting the effect of redirecting the buffering properties will contribute to the longevity characteristic of this type of continuous casting walking bar equipment water-cooled plate.

また、本発明は複合作用効果をねらった連鋳用水冷板の
製法であるともいえる。つまり、２枚の鋼板を取合して
開先内溶接し、水路（９）に角形溝を設けたり、逆に、
角材を従来通り使用して溶接し、水路（９）をさらに滑
らかな円弧湾曲（５）ではじまる切削溝を付加しても、
従来法による水冷板よりは３動程度は寿命延長できるが
、本発明は両者の組合せによって３割＋３割＝６割、即
ち１゜６倍ではなく、３Ｘ３＝９割あるいは３　＝２７
割、即ち１．９倍とか３．７倍といった相乗あるいは階
乗効果が得られるものである。Furthermore, the present invention can be said to be a method for manufacturing a water-cooled plate for continuous casting, which aims at multiple functions and effects. In other words, two steel plates are joined together and welded within the groove, and a square groove is provided in the waterway (9), or conversely,
Even if square timbers are used and welded as before, and a cut groove starting with a smooth arc curve (5) is added to the water channel (9),
Although the life of a water-cooled plate using the conventional method can be extended by about 3 motions, the life of the present invention can be extended by about 3 motions due to the combination of the two.
In other words, a synergistic or factorial effect such as 1.9 times or 3.7 times can be obtained.

本発明方法によれば、その基本的な製作方法を変えるこ
となく第２図乃至第４図の如き各種の有能なる構造の水
冷板を製作できる。According to the method of the present invention, water-cooled plates having various structures as shown in FIGS. 2 to 4 can be manufactured without changing the basic manufacturing method.

即ち、第２図は、２枚の鋼板（ｌａ）（Ｉｂ）の両側角
部に、ガス切削面取による溶接開先（２ａ）を設け、冷
却用水路を例えば往水路（６ａ）と復水路（６ｂ）とに
グランド部（１０）にて仕切る構造としている。これに
よれば給・排水を同一方向へ集合出来る利点の他、流速
を増大できるため、水路内表面の付着物による伝熱性阻
害が解消できる効果が付加され、本発明性製品の性能が
さらに倍加されるのであるまた、第３図の如（，２枚の
鋼板（ｌａＨＩｂ）の一方又は双方に連続する略半円形
水路群（６Ｃ）・・・なるものを加１゜すれば、水冷板
のスラブ即ち、赤熱鋳片との接触面（１１）の最高到達
ｌ！ｕ１度レベ小レベル出来るので、表皮に発生するヒ
ートクラ・り（１２）を軽減できるごとき秀れたる効果
が生じ、使用性が一段と飛躍する。のみならず図示の如
（片方のみに略半円形水路群（６）を形成するものにあ
っては熱片との反接触側（１３）との両表皮温度差の絶
対値は月−縮されるので、サーマルストレス軽減による
溶接境界部または及び熱影響部の応力に選択腐食の軽減
効果やクラック発生防市、さらにはまた、クラック発生
部における酸素濃淡電池腐食による１１（水トラブルが
解消できるものである。That is, in FIG. 2, welding grooves (2a) are formed by gas cutting and chamfering at both corners of two steel plates (la) and (Ib), and cooling channels are formed, for example, by an outflow channel (6a) and a return channel (6a). 6b) and a ground portion (10). This not only has the advantage of allowing the supply and drainage water to gather in the same direction, but also increases the flow velocity, which has the added effect of eliminating heat transfer inhibition caused by deposits on the inner surface of the waterway, further doubling the performance of the inventive product. In addition, if we add 1 degree of the substantially semicircular water channel group (6C) continuous to one or both of the two steel plates (laHIb) as shown in Fig. 3, the water cooling plate can be Since the highest level of l!u1 degree of the contact surface (11) with the slab, that is, the red-hot slab, can be reduced to a small level, excellent effects such as reducing the heat cracking (12) generated on the skin are produced, and the usability is improved. Not only that, but also as shown in the figure (in the case where a substantially semicircular water channel group (6) is formed only on one side, the absolute value of the difference in temperature of both skins with the side (13) opposite to the contact with the heating piece is Since the thermal stress is reduced, the stress at the weld boundary or heat-affected zone has the effect of reducing selective corrosion and preventing crack generation. can be resolved.

さらには、第４図の如く、２枚の鋼板（ｌａ３（！ｂ）
のうち片方のみに、滑らかな円弧湾曲（５）ではじまる
空胴溝（６）を設け、これにて水路を形成せし２むるシ
ンプルな製法をとることも出来るし、他力鋼板（１ｂ）
の重ね合わせ而（１４）に鋸歯状の加−１−を施すこと
や、水路表面全面に、耐熱防食、耐酸化、伝熱改；９、
耐摩用処理を行うことも極めてイｒ効となる。Furthermore, as shown in Figure 4, two steel plates (la3(!b)
A simple manufacturing method can be used in which a hollow groove (6) starting with a smooth circular arc curve (5) is provided on only one side of the plate to form a waterway, or the external steel plate (1b)
By applying sawtooth-like addition to the superposition (14) of
Abrasion-resistant treatment is also extremely irritating.

（発明の効果） 以１−訂述したように本発明方法により製作された水冷
板にあっては、水冷板品質を・定化し、かつ寿命を飛躍
的に増大させることができると共に、亀裂発生やエロー
ジョン、コロ−ジョンに対しても優れた性能を有し、し
かして水もれ事故発生をなくして操業停市を防ぎ、また
水冷板の製作費、取付は費、工事費等の・連の保全費を
著しく削減できる等、極めてイｆ用である。(Effects of the Invention) As described in 1-1 above, in the water-cooled plate manufactured by the method of the present invention, the quality of the water-cooled plate can be stabilized, the service life can be dramatically increased, and the occurrence of cracks can be improved. It has excellent performance against water cooling, erosion, and corrosion, thereby eliminating water leakage accidents and preventing operational stoppages. This is extremely useful as it can significantly reduce maintenance costs.

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

図面は本発明の一実施例を示すもので、第１図（Ｉ）〜
（ＩＶ）は水冷板製造過程の説明図、第２図乃至第４図
は本発明方法によって得られる水冷板構造の応用例を示
す図である。 （Ｉａ）（Ｉｂ）・・・鋼板、（２）・・・開先部、（
６）・・・空胴溝、（８）・・・溶込み溶接部、（３）
・・・冷却用水路。 第１図 ７　ｔ　図　　　　　　　　　　　　（ｍ第１図（ｒ７
）The drawings show one embodiment of the present invention, and FIGS.
(IV) is an explanatory diagram of the water-cooled plate manufacturing process, and FIGS. 2 to 4 are diagrams showing application examples of the water-cooled plate structure obtained by the method of the present invention. (Ia) (Ib)... Steel plate, (2)... Groove portion, (
6)...Cavity groove, (8)...Penetration welded part, (3)
...Cooling water channel. Fig. 1 7 t Fig. (m Fig. 1 (r7
)

Claims (1)

【特許請求の範囲】[Claims] ２枚の短冊状鋼板のいずれか一方、もしくは双方の鋼板
重ね合わせ面の両側角部に空間開先部を切欠形成し、か
つ両側開先部の間を溝掘り加工して空胴溝を設けて、両
鋼板の重ね合わせ後に突合わせ開先部を完全溶込み溶接
して一体化すると共に、両鋼板間に上記空胴溝による冷
却用水路を形成し、次にこの水路両端を閉塞し、しかし
て応力除去焼鈍加工、円弧状曲げ加工、機械切削加工等
を施す連続鋳造用水冷板の製作方法。A space groove is cut out at both corners of one or both of the two strip-shaped steel plates on which the steel plates overlap, and a cavity groove is provided by cutting a groove between the grooves on both sides. Then, after overlapping both steel plates, the butt grooves are completely penetrate welded and integrated, and a cooling waterway is formed between the two steel plates by the cavity groove, and then both ends of this waterway are closed. A method for manufacturing water-cooled plates for continuous casting, which is subjected to stress relief annealing, arc bending, mechanical cutting, etc.