JP4611350B2 - Continuous casting mold - Google Patents

Description

本発明は、鋳片を製造するために使用する連続鋳造用鋳型に関する。 The present invention relates to a continuous casting mold used for producing a slab.

従来、図５、図６（Ａ）〜（Ｃ）に示す連続鋳造用鋳型（以下、単に鋳型ともいう）８０に溶鋼を供給して鋳片を鋳造している。この鋳型８０は、間隔を有して対向配置された銅板で構成される一対の短辺（短片ともいう）８１、８２と、この各短辺８１、８２を幅方向両側から挟み込んだ状態で対向配置された銅板で構成される一対の長辺（長片ともいう）８３、８４とを備えている。
この短辺８１、８２は、鏡面対称で同じ構成となっており、裏面側の上下方向に多数の導水溝８５〜８７が設けられ、この短辺８１、８２の裏面側に、ボルト８８によってバックプレート（支持部材、冷却箱、又は水箱ともいう）８９、９０が固定されている。また、長辺８３、８４も、裏面側の上下方向に多数の導水溝８５〜８７が設けられ、この長辺８３、８４の裏面側に、ボルト８８によってバックプレート９１、９２が固定されている（例えば、特許文献１参照）。 Conventionally, molten steel is supplied to a continuous casting mold (hereinafter, also simply referred to as a mold) 80 shown in FIGS. 5 and 6A to 6C to cast a slab. The mold 80 is opposed to a pair of short sides (also referred to as short pieces) 81 and 82 made of copper plates opposed to each other with a gap therebetween, with the short sides 81 and 82 being sandwiched from both sides in the width direction. And a pair of long sides (also referred to as long pieces) 83 and 84 formed of copper plates arranged.
The short sides 81 and 82 are mirror-symmetrical and have the same configuration, and a large number of water guide grooves 85 to 87 are provided in the vertical direction on the back side. The back side of the short sides 81 and 82 is backed by bolts 88. Plates 89 and 90 (also called support members, cooling boxes, or water boxes) are fixed. The long sides 83 and 84 are also provided with a large number of water guide grooves 85 to 87 in the vertical direction on the back side, and the back plates 91 and 92 are fixed to the back side of the long sides 83 and 84 by bolts 88. (For example, refer to Patent Document 1).

鋳型８０は、短辺８１、８２、長辺８３、８４、及びそれぞれのバックプレート８９〜９２を有して構成され、対向配置される長辺８３、８４に固定されたバックプレート９１、９２の両端部には、それぞれボルト９３が取付けられ、ばね（図示しない）を介してナット９４で固定されている。
連続鋳造作業時においては、バックプレート８９〜９２の下部に設けられた給水部（図示しない）から、短辺８１、８２及び長辺８３、８４に設けられた多数の導水溝８５〜８７を介して、バックプレート８９〜９２の上部に設けられた排水部（図示しない）へ冷却水を流している。これにより、各短辺８１、８２と各長辺８３、８４を冷却しながら、鋳型８０の上方から溶鋼を注いで溶鋼の初期凝固を行い、凝固シェルが形成された鋳片を鋳型下方よりほぼ一定速度で連続して引き抜き、鋳片を製造する。 The mold 80 is configured to include short sides 81 and 82, long sides 83 and 84, and respective back plates 89 to 92, and the back plates 91 and 92 fixed to the long sides 83 and 84 that are opposed to each other. Bolts 93 are attached to both ends, and are fixed with nuts 94 via springs (not shown).
At the time of continuous casting work, from the water supply part (not shown) provided in the lower part of the back plates 89 to 92, the short sides 81 and 82 and the long sides 83 and 84 are provided via a large number of water guide grooves 85 to 87. Then, cooling water is allowed to flow to a drainage section (not shown) provided on the upper portions of the back plates 89 to 92. As a result, while cooling the short sides 81 and 82 and the long sides 83 and 84, the molten steel is poured from above the mold 80 to perform the initial solidification of the molten steel, and the slab formed with the solidified shell is almost removed from below the mold. Drawing continuously at a constant speed to produce a slab.

特開２００３−１３６２０４号公報JP 2003-136204 A

しかしながら、従来の各短辺８１、８２及び各長辺８３、８４には、幅狭で深さが深い導水溝８５〜８７が形成されているため、各短辺８１、８２及び各長辺８３、８４の厚みを必要以上に厚く（例えば、３０ｍｍ程度）する必要があり、発生する熱応力も高くなっていた。また、導水溝８５〜８７の構造そのものが、各短辺８１、８２及び各長辺８３、８４の変形を防止するリブの役目をしていたため、その自由変形を拘束していた。
このため、熱負荷が大きい湯面（メニスカス）近傍では、各短辺８１、８２及び各長辺８３、８４の拘束ひずみが増して、応力状態が悪化、即ち塑性ひずみの発生が増大していた。これにより、メニスカスクラック（メニスカスレベル付近に発生するヒートクラック：以下、単にクラックともいう）が発生して、鋳型寿命を低下させる問題があった。
更に、各短辺８１、８２及び各長辺８３、８４の厚みが厚くなるに伴い、溶鋼を電磁撹拌する際に、各短辺８１、８２及び各長辺８３、８４内に形成される渦電流が大きくなり、溶鋼の撹拌力を低下させたり、また各短辺８１、８２及び各長辺８３、８４を製造するための材料コストがかかる問題もある。 However, since the conventional short sides 81 and 82 and the long sides 83 and 84 are formed with narrow and deep water guide grooves 85 to 87, the short sides 81 and 82 and the long sides 83 are formed. , 84 needs to be thicker than necessary (for example, about 30 mm), and the generated thermal stress is also high. Moreover, since the structure itself of the water guide grooves 85 to 87 served as a rib for preventing the deformation of the short sides 81 and 82 and the long sides 83 and 84, the free deformation was restricted.
For this reason, in the vicinity of the molten metal surface (meniscus) where the heat load is large, the restraint strain of each short side 81, 82 and each long side 83, 84 is increased, and the stress state is deteriorated, that is, the occurrence of plastic strain is increased. . As a result, meniscus cracks (heat cracks generated in the vicinity of the meniscus level: hereinafter, also simply referred to as cracks) are generated, and there is a problem of reducing the mold life.
Further, as the thickness of each short side 81, 82 and each long side 83, 84 increases, vortices formed in each short side 81, 82 and each long side 83, 84 when the molten steel is electromagnetically stirred. There is a problem that the current is increased, the stirring power of the molten steel is reduced, and the material cost for manufacturing the short sides 81 and 82 and the long sides 83 and 84 is high.

本発明はかかる事情に鑑みてなされたもので、熱応力及び導水溝構造によるメニスカスクラックの発生を抑制して、長寿命化を図ることが可能な連続鋳造用鋳型を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a continuous casting mold capable of suppressing the generation of meniscus cracks due to thermal stress and a water guide groove structure and extending the life. .

前記目的に沿う本発明に係る連続鋳造用鋳型は、間隔を有して対向配置された一対の短辺と、該短辺を幅方向両側から挟み込んだ状態で対向配置された一対の長辺と、前記短辺及び前記長辺の裏面側にそれぞれ上下方向に並べて配置された複数の締結手段を備えた締結手段群によってそれぞれ固定された支持部材とを有し、該支持部材に設けられた給水部及び排水部を介して、前記短辺及び前記長辺の裏面側に設けられた多数の導水溝に冷却水を流すことで、前記短辺及び前記長辺の冷却を行うと共に溶鋼の冷却を行って鋳片を製造する連続鋳造用鋳型において、
前記短辺又は前記長辺を構成する冷却部材の裏面側に設けられた前記導水溝は、該冷却部材の幅方向に隣り合う前記締結手段群の間に形成された空間部と、前記冷却部材の裏面側に向けて突出して、その先端面が前記冷却部材の前記空間部の底面に当接する仕切り部が設けられた前記支持部材とで形成され、
しかも前記導水溝のうち、少なくとも前記冷却部材のメニスカス直下に位置する前記締結手段の側方部分の前記導水溝に対して、該側方部分の該導水溝の内幅を、上下方向に隣り合う前記締結手段間の前記導水溝の内幅よりも狭くし、かつ前記側方部分の前記導水溝の深さを、上下方向に隣り合う前記締結手段間の前記導水溝の深さよりも深くし、
更に、前記締結手段の側方部分の前記導水溝の平断面積を、上下方向に隣り合う前記締結手段間の前記導水溝の平断面積の−２０％以上＋２０％以下の範囲内とした。
The continuous casting mold according to the present invention that meets the above-mentioned object is a pair of short sides that are arranged to face each other with a gap therebetween, and a pair of long sides that are arranged to face each other with the short sides sandwiched from both sides in the width direction. And a support member fixed by a fastening means group including a plurality of fastening means arranged in the vertical direction on the back side of the short side and the long side, respectively, and water supply provided to the support member Cooling the molten steel while cooling the short side and the long side by flowing cooling water through a plurality of water guide grooves provided on the back side of the short side and the long side through the part and the drainage part. In a continuous casting mold for producing a slab by performing
The water guide groove provided on the back surface side of the cooling member constituting the short side or the long side is a space formed between the fastening means groups adjacent in the width direction of the cooling member, and the cooling member Projecting toward the back side of the cooling member, and the front end surface of the cooling member is formed with the support member provided with a partition portion that contacts the bottom surface of the space portion,
Moreover among the water guide groove, relative to the water guide groove of the side portions of said fastening means located on the meniscus immediately below at least the cooling member, the inner width of the water conducting grooves of said side portions, adjacent in the vertical direction Narrower than the inner width of the water guide groove between the fastening means, and the depth of the water guide groove of the side portion is deeper than the depth of the water guide groove between the fastening means adjacent in the vertical direction,
Furthermore, the plane cross-sectional area of the water guide groove at the side portion of the fastening means is set within the range of −20% to + 20% of the cross-sectional area of the water guide groove between the fastening means adjacent in the vertical direction.

本発明に係る連続鋳造用鋳型において、少なくとも前記冷却部材のメニスカス直下に位置する前記締結手段の側方部分の前記導水溝の底部に、冷却効率を増大させる水平突起からなるフィンを設けることが好ましい。
本発明に係る連続鋳造用鋳型において、前記メニスカスは、前記冷却部材の上端から下方へ５０ｍｍ以上１５０ｍｍ以下の範囲内にあり、しかも前記フィンを、該メニスカスの上方５０ｍｍの位置から、該メニスカスの下方１５０ｍｍ位置までの範囲内に設けることが好ましい。 In the continuous casting mold according to the present invention, it is preferable that a fin made of a horizontal protrusion for increasing cooling efficiency is provided at the bottom of the water guiding groove at a side portion of the fastening means positioned at least immediately below the meniscus of the cooling member. .
In the continuous casting mold according to the present invention, the meniscus is in a range of 50 mm or more and 150 mm or less downward from the upper end of the cooling member, and the fin is placed below the meniscus from a position 50 mm above the meniscus. It is preferable to provide it within a range up to 150 mm.

請求項１〜３記載の連続鋳造用鋳型は、冷却部材の裏面側に設けられた導水溝を、冷却部材の幅方向に隣り合う締結手段群の間の空間部と、この空間部の底面に当接する仕切り部が設けられた支持部材とで形成するので、従来の導水溝構造とは異なり、冷却部材（短辺及び長辺）自体に導水溝（スリット）を形成しない構造とすることができる。
これにより、冷却部材自体の拘束ひずみを緩和することができるので、冷却部材でのクラックの発生を抑制（発生ひずみを低減）でき、鋳型の長寿命化を図ることができる。
また、冷却部材に導水溝を設けないことで、冷却部材の厚みを従来よりも薄くできるので、冷却部材の冷却効率を高めることができ、冷却部材でのクラックの発生を更に抑制できる。更に、鋳型内に形成される渦電流を抑制でき、溶鋼の撹拌力を現状よりも向上できると共に、材料コストの低減も図れる。 The casting mold for continuous casting according to claims 1 to 3, wherein a water guide groove provided on the back surface side of the cooling member is formed on a space portion between fastening means groups adjacent in the width direction of the cooling member, and on a bottom surface of the space portion. Since it forms with the support member provided with the partition part which contact | abuts, it can be set as the structure which does not form a water guide groove (slit) in cooling member (short side and long side) itself unlike the conventional water guide groove structure. .
Thereby, since the restraining strain of the cooling member itself can be relaxed, the generation of cracks in the cooling member can be suppressed (the generated strain can be reduced), and the life of the mold can be extended.
Moreover, since the thickness of the cooling member can be made thinner than before by not providing the water guide groove in the cooling member, the cooling efficiency of the cooling member can be increased, and the generation of cracks in the cooling member can be further suppressed. Furthermore, the eddy current formed in the mold can be suppressed, the stirring power of the molten steel can be improved as compared with the current situation, and the material cost can be reduced.

そして、冷却部材のメニスカス直下に位置する締結手段の側方部分の導水溝の内幅を、上下方向の締結手段間の導水溝の内幅よりも狭くし、かつ側方部分の導水溝の深さを、上下方向の締結手段間の導水溝の深さよりも深くするので、従来温度が高くなり易かった部分の冷却効率を高めることができ、冷却部材でのクラックの発生を更に抑制できる。
更に、メニスカス直下に位置する締結手段の側方部分の導水溝の平断面積を、上下方向の締結手段間の導水溝の平断面積に対して所定範囲内に規定するので、圧力損失の上昇を抑制できる。これにより、冷却部材の下部から上部へかけて冷却水の流れを安定にできるので、冷却部材の均一な冷却を実施でき、クラックの発生を更に抑制できる。 Then, the inner width of the water guide groove at the side portion of the fastening means located directly below the meniscus of the cooling member is made narrower than the inner width of the water guide groove between the fastening means in the vertical direction, and the depth of the water guide groove at the side portion is set. Since the depth is made deeper than the depth of the water guide groove between the fastening means in the vertical direction, it is possible to increase the cooling efficiency of the portion where the conventional temperature is likely to be high, and it is possible to further suppress the occurrence of cracks in the cooling member.
Furthermore, since the flat cross-sectional area of the water guide groove at the side portion of the fastening means located immediately below the meniscus is defined within a predetermined range with respect to the flat cross-sectional area of the water guide groove between the fastening means in the vertical direction, the pressure loss increases. Can be suppressed. Thereby, since the flow of cooling water can be stabilized from the lower part to the upper part of the cooling member, the cooling member can be uniformly cooled, and the generation of cracks can be further suppressed.

特に、請求項２記載の連続鋳造用鋳型は、冷却部材のメニスカス直下に位置する締結手段の側方部分の導水溝の底部に、冷却効率を増大させる水平突起からなるフィンを設けるので、熱負荷が大きい湯面近傍の鋳型温度の上昇を抑制できる。これにより、冷却部材でのクラックの発生を抑制でき、鋳型の長寿命化を図ることができる。
請求項３記載の連続鋳造用鋳型は、フィンを設ける領域を、適切な範囲に設定することで、冷却部材でのクラックの発生を更に抑制できる。 In particular, the continuous casting mold according to claim 2 is provided with fins made of horizontal protrusions for increasing the cooling efficiency at the bottom of the water guide groove at the side portion of the fastening means located immediately below the meniscus of the cooling member. Can suppress an increase in mold temperature in the vicinity of the molten metal surface. Thereby, generation | occurrence | production of the crack in a cooling member can be suppressed, and lifetime improvement of a casting_mold | template can be achieved.
The continuous casting mold according to claim 3 can further suppress the occurrence of cracks in the cooling member by setting the region in which the fin is provided to an appropriate range.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
ここで、図１（Ａ）は本発明の一実施の形態に係る連続鋳造用鋳型のメニスカス直下に位置する締結手段近傍の部分平断面図、（Ｂ）は同連続鋳造用鋳型の上下方向に隣り合う締結手段間の部分平断面図、図２（Ａ）は同連続鋳造用鋳型の長辺の裏面側の説明図、（Ｂ）は（Ａ）のａ−ａ矢視断面図、（Ｃ）は（Ａ）のｂ−ｂ矢視断面図、図３（Ａ）は同連続鋳造用鋳のバックプレートの正面側の説明図、（Ｂ）は（Ａ）のｃ−ｃ部分矢視断面図、（Ｃ）は（Ａ）のｄ−ｄ部分矢視断面図、図４（Ａ）は変形例に係る長辺の裏面側の部分拡大図、（Ｂ）は（Ａ）のｅ−ｅ矢視断面図である。 Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 (A) is a partial plan sectional view in the vicinity of the fastening means located immediately below the meniscus of the continuous casting mold according to one embodiment of the present invention, and FIG. 1 (B) is a vertical view of the continuous casting mold. FIG. 2A is an explanatory view of the back side of the long side of the continuous casting mold, FIG. 2B is a sectional view taken along the line aa in FIG. ) Is a cross-sectional view taken along the line bb of (A), FIG. 3A is an explanatory view of the front side of the back plate of the continuous casting, and FIG. FIG. 4C is a sectional view taken along the line dd in FIG. 4A, FIG. 4A is a partially enlarged view of the back side of the long side according to the modification, and FIG. 4B is an ee in FIG. It is arrow sectional drawing.

図１〜図３に示すように、本発明の一実施の形態に係る連続鋳造用鋳型（以下、単に鋳型ともいう）は、間隔を有して対向配置された図示しない一対の短辺（短片ともいう）と、短辺を幅方向両側から挟み込んだ状態で対向配置された一対の長辺（長片ともいう）１０、１１と、短辺と長辺１０、１１の裏面（溶鋼と接する面とは反対側の面）側にそれぞれ上下方向に並べて配置された複数の締結手段１２、１２ａを備えた締結手段群によってそれぞれ固定された支持部材の一例であるバックプレート（冷却箱又は水箱ともいう）１３、１４とを有するものである。これにより、バックプレート１３、１４の下部に設けられた給水部１５から、短辺と長辺１０、１１の裏面側に設けられた多数の導水溝１６〜１８を介して、バックプレート１３、１４の上部に設けられた排水部１９へ冷却水を流し、短辺と長辺１０、１１の冷却を行うと共に、短辺と長辺１０、１１とで形成される鋳型本体内に供給された溶鋼を、冷却部材となる短辺と長辺１０、１１で冷却し凝固させながら下方へ引き抜きスラブ（鋳片の一例）を製造できる。なお、短辺と長辺１０、１１は、その幅のみが異なって他の構成は略同様であり、また長辺１０、１１は鏡面対称であるため、以下、図１〜図３に示す長辺１０の構成を主として、詳しく説明する。 As shown in FIGS. 1 to 3, a continuous casting mold (hereinafter also simply referred to as a mold) according to an embodiment of the present invention has a pair of short sides (short pieces) (not shown) arranged to face each other with a gap therebetween. And a pair of long sides (also referred to as long pieces) 10 and 11 which are arranged to face each other with the short sides sandwiched from both sides in the width direction, and the back surfaces of the short sides and the long sides 10 and 11 (surfaces in contact with the molten steel) Back plate (also referred to as a cooling box or a water box) which is an example of a support member fixed by a fastening means group including a plurality of fastening means 12 and 12a arranged in the vertical direction on the opposite side). ) 13 and 14. Thereby, from the water supply part 15 provided in the lower part of the back plates 13 and 14, the back plates 13 and 14 are passed through the multiple water guide grooves 16 to 18 provided on the back side of the short sides and the long sides 10 and 11. While flowing cooling water to the drainage part 19 provided in the upper part of the steel, the short side and the long sides 10 and 11 are cooled, and the molten steel supplied into the mold body formed by the short sides and the long sides 10 and 11 The slab (an example of a slab) can be manufactured by drawing it downward while cooling it with the short sides and the long sides 10 and 11 that become the cooling members and solidifying it. The short sides and the long sides 10 and 11 are different in only the width, and the other configurations are substantially the same. Further, since the long sides 10 and 11 are mirror-symmetrical, the lengths shown in FIGS. The configuration of the side 10 will be mainly described in detail.

各短辺は、銅又は銅合金で構成され、例えば、厚みが５ｍｍ以上１００ｍｍ以下程度、幅が５０ｍｍ以上３００ｍｍ以下程度で、上下方向の長さが６００ｍｍ以上１２００ｍｍ以下程度である。また、各長辺１０、１１は、銅又は銅合金で構成され、例えば、厚みが５ｍｍ以上１００ｍｍ以下程度、幅（鋳片と接触する幅）が６００ｍｍ以上３０００ｍｍ以下程度、上下方向の長さが短辺と同程度である。
従って、対向配置される一対の短辺の間隔は、６００ｍｍ以上３０００ｍｍ以下程度であり、一対の長片１０、１１の間隔は、５０ｍｍ以上３００ｍｍ以下程度であり、また鋳型の上下方向の長さは、６００ｍｍ以上１２００ｍｍ以下程度である。なお、対向配置される短辺は、上記した範囲内でその間隔を変えることができる。
これにより、例えば、幅が６００ｍｍ以上３０００ｍｍ以下程度、厚みが５０ｍｍ以上３００ｍｍ以下程度のスラブを製造できる。 Each short side is made of copper or a copper alloy, and has a thickness of about 5 mm to 100 mm, a width of about 50 mm to 300 mm, and a vertical length of about 600 mm to 1200 mm. Each of the long sides 10 and 11 is made of copper or a copper alloy. For example, the thickness is about 5 mm to 100 mm, the width (the width in contact with the slab) is about 600 mm to 3000 mm, and the length in the vertical direction is The same as the short side.
Therefore, the distance between the pair of short sides arranged opposite to each other is about 600 mm to 3000 mm, the distance between the pair of long pieces 10 and 11 is about 50 mm to 300 mm, and the length of the mold in the vertical direction is , 600 mm or more and 1200 mm or less. In addition, the short side opposingly arranged can change the space | interval within the above-mentioned range.
Thereby, for example, a slab having a width of about 600 mm to about 3000 mm and a thickness of about 50 mm to about 300 mm can be manufactured.

図１（Ａ）、（Ｂ）、図２（Ａ）〜（Ｃ）、図３（Ａ）〜（Ｃ）に示すように、長辺１０の裏面側に設けられた導水溝１６〜１８は、長辺１０の幅方向に隣り合う締結手段群の間に形成された空間部２０と、バックプレート１３とで形成されている。
この空間部２０は、長辺１０を薄肉平板化して、この部分の長辺１０の厚みＴ１を、３ｍｍ以上３０ｍｍ以下とするようにして形成する。
ここで、薄肉平板化した部分の長辺の厚みが３ｍｍ未満の場合、長辺の繰り返し使用時における研削代が減少して鋳型使用回数の低下が生じる。一方、厚みが３０ｍｍを超える場合、厚みが厚くなり過ぎ、鋳型温度の上昇と締結の拘束による発生応力の増加により、塑性ひずみの発生量が増大する。
以上のことから、薄肉平板化した長辺の厚みＴ１を、３ｍｍ以上３０ｍｍ以下としたが、上限を２０ｍｍ、更には１２ｍｍとすることが好ましく、下限を５ｍｍ、更には７ｍｍとすることが好ましい。 As shown in FIGS. 1A, 1B, 2A to 2C, and FIGS. 3A to 3C, the water guide grooves 16 to 18 provided on the back side of the long side 10 are The back plate 13 is formed by a space 20 formed between fastening means groups adjacent in the width direction of the long side 10.
The space portion 20 is formed by thinning the long side 10 into a flat plate so that the thickness T1 of the long side 10 of this portion is 3 mm or more and 30 mm or less.
Here, when the thickness of the long side of the thinned flat portion is less than 3 mm, the grinding allowance at the time of repeated use of the long side is reduced and the number of times the mold is used is reduced. On the other hand, when the thickness exceeds 30 mm, the thickness becomes too thick, and the amount of plastic strain increases due to an increase in generated temperature due to an increase in mold temperature and fastening constraints.
From the above, the thickness T1 of the long side that has been flattened is set to 3 mm or more and 30 mm or less. However, the upper limit is preferably 20 mm, more preferably 12 mm, and the lower limit is preferably 5 mm, more preferably 7 mm.

長辺１０の裏面側には、薄肉平板化されなかった部分（即ち、締結手段群の上下に隣り合う締結手段１２、１２ａを連結する領域）が、長辺１０の上下方向に渡って長辺１０の裏面側に突出する固定部２１として残されている。なお、幅方向に隣り合う締結手段群の間隔Ｓは、例えば、５０ｍｍ以上２００ｍｍ以下程度である。また、締結手段群を構成する締結手段１２と締結手段１２ａは、形状のみが異なるものである。
一方、バックプレート１３には、長辺１０の裏面側に向けて長辺１０の上下方向に渡って突出して、その先端面が長辺１０の空間部２０の底面に当接する仕切り部２２、２３が設けられている。このとき、長辺１０に設けた固定部２１の先端面は、締結手段群の列を横切って隣り合う仕切り部２３、２２の間に形成される凹面２４に当接する。
これにより、隣り合う締結手段群間に、それぞれ複数（ここでは、３本）の導水溝１６〜１８が形成される。
この導水溝１６〜１８のうち、締結手段群に隣接する導水溝１６、１８は、長辺１０の上下方向に渡ってその断面形状が、締結手段１２の側方に位置する部分と、他の部分（固定部２０の側方に位置する部分）とで異なっている。なお、導水溝１６、１８の間に位置する導水溝１７は、長辺１０の上下方向に渡ってその断面形状が同一である。 On the back side of the long side 10, a portion that is not flattened (that is, a region connecting the fastening means 12, 12 a adjacent to the top and bottom of the fastening means group) extends in the vertical direction of the long side 10. 10 is left as a fixing portion 21 protruding on the back side. In addition, the space | interval S of the fastening means group adjacent to the width direction is about 50 mm or more and 200 mm or less, for example. Moreover, the fastening means 12 and the fastening means 12a which comprise a fastening means group differ only in a shape.
On the other hand, the back plate 13 protrudes in the vertical direction of the long side 10 toward the back side of the long side 10, and the partition portions 22, 23 whose front end surfaces abut against the bottom surface of the space portion 20 of the long side 10. Is provided. At this time, the front end surface of the fixing portion 21 provided on the long side 10 abuts on the concave surface 24 formed between the adjacent partition portions 23 and 22 across the row of the fastening means group.
Thereby, a plurality of (here, three) water guide grooves 16 to 18 are formed between adjacent fastening means groups.
Among the water guide grooves 16 to 18, the water guide grooves 16 and 18 adjacent to the fastening means group have portions whose cross-sectional shape is located on the side of the fastening means 12 in the vertical direction of the long side 10, and other parts. It differs in the part (part located in the side of the fixing | fixed part 20). In addition, the cross-sectional shape of the water guide groove 17 located between the water guide grooves 16 and 18 is the same across the vertical direction of the long side 10.

図１（Ａ）に示すメニスカス直下に位置する締結手段１２の側方部分の導水溝１６（導水溝１８も同様）の内幅Ｗ１は、図１（Ｂ）に示す上下方向に隣り合う締結手段１２間の導水溝１６の内幅Ｗ２よりも狭く、かつ図１（Ａ）に示す側方部分の導水溝１６の深さＤ１は、図１（Ｂ）に示す上下方向に隣り合う締結手段１２間の導水溝１６の深さＤ２よりも深くなっている。
具体的には、Ｗ１が３ｍｍ以上４０ｍｍ以下、Ｄ１が３ｍｍを超え２０ｍｍ以下であり、しかもこのとき、Ｄ１／Ｗ１が、０．０７５を超え５以下の関係を満足している。また、Ｗ２が１０ｍｍ以上８０ｍｍ以下、Ｄ２が３ｍｍ以上１０ｍｍ以下であり、しかもこのとき、Ｄ２／Ｗ２が、０．０７５以上１以下の関係を満足している。これにより、締結手段１２近傍の冷却効率を高めることができる。
なお、図１（Ａ）は冷却部材のメニスカス直下に位置する締結手段の側方部分の導水溝を示しているが、本実施の形態ではメニスカス直下以外に位置する締結手段の側方部分の導水溝も同様の形状となっている。 The inner width W1 of the water guide groove 16 (the same applies to the water guide groove 18) of the side portion of the fastening means 12 positioned immediately below the meniscus shown in FIG. 1A is the fastening means adjacent in the vertical direction shown in FIG. The fastening means 12 that is narrower than the inner width W2 of the water guide groove 16 between the two and has a depth D1 of the side water guide groove 16 shown in FIG. 1 (A) is adjacent in the vertical direction shown in FIG. 1 (B). It is deeper than the depth D2 of the water guide groove 16 therebetween.
Specifically, W1 is not less than 3 mm and not more than 40 mm, D1 is more than 3 mm and not more than 20 mm, and at this time, D1 / W1 exceeds 0.075 and satisfies the relationship of 5 or less. Further, W2 is 10 mm or more and 80 mm or less, D2 is 3 mm or more and 10 mm or less, and D2 / W2 satisfies the relationship of 0.075 or more and 1 or less. Thereby, the cooling efficiency of the fastening means 12 vicinity can be improved.
FIG. 1A shows a water guide groove in the side portion of the fastening means located directly below the meniscus of the cooling member, but in this embodiment, the water guide groove in the side portion of the fastening means located other than directly below the meniscus. The groove has the same shape.

ここで、導水溝１６の締結手段１２の側方部分の領域Ａと、上下方向に隣り合う締結手段１２間の領域Ｂとの接続部は、領域Ｂから領域Ａへ向け、その内幅を連続的（曲面的）に徐々に幅狭にしている。また、接続部は、領域Ｂから領域Ａへ向け、その深さを徐々に深くしている。
なお、締結手段１２の側方部分の導水溝１６（領域Ａ）の平断面積は、上下方向に隣り合う締結手段１２間の導水溝１６（領域Ｂ）の平断面積と同じ、又は−２０％以上＋２０％以下（好ましくは、上限を＋５％、下限を−５％）の範囲内である。
これにより、導水溝１６を流れる冷却水の流速を、長辺１０の下部から上部まで略均一にできるが、締結手段の側方部分の導水溝の平断面積を、上下方向に隣り合う締結手段間の導水溝の平断面積より小さくして、導水溝における冷却効率を高めることもできる。 Here, the connection portion between the region A in the side portion of the fastening means 12 of the water guiding groove 16 and the region B between the fastening means 12 adjacent in the vertical direction is directed from the region B to the region A, and the inner width is continuous. The width is gradually narrowed in a curved manner. Further, the connection portion gradually increases in depth from region B to region A.
In addition, the plane cross-sectional area of the water guide groove 16 (region A) on the side portion of the fastening means 12 is the same as the plane cross-sectional area of the water guide groove 16 (region B) between the fastening means 12 adjacent in the vertical direction, or −20. % Or more and + 20% or less (preferably, the upper limit is + 5% and the lower limit is −5%).
Thereby, although the flow rate of the cooling water flowing through the water guide groove 16 can be made substantially uniform from the lower part to the upper part of the long side 10, the cross-sectional area of the water guide groove in the side portion of the fastening means is the fastening means adjacent in the vertical direction. The cooling efficiency in the water guide groove can also be increased by making it smaller than the plane cross-sectional area of the water guide groove.

更に、図４（Ａ）、（Ｂ）に示すように、長辺３０の空間部２０と、バックプレート１３の仕切り部２２、２３によって形成された導水溝３１〜３３のうち、締結手段群に隣接する導水溝３１、３３のメニスカス直下に位置する締結手段１２の側方部分の底部に、冷却効率を増大させる水平突起からなるフィン３４、３５を設けてもよい。なお、長辺３０は、フィン３４、３５が設けられたこと以外は、前記した長辺１０と同一構成である。
このフィン３４、３５は、導水溝３１、３３が形成される領域の底面に対して、長辺３０の幅方向に、例えば、ボールエンドミル（図示しない）を動かすことで形成できる。このフィン３４、３５は、側断面視して波状に形成されており、長辺３０の上下方向のピッチＰが１ｍｍ以上５ｍｍ以下程度、深さＤ３が、フィン３４、３５を形成する前の底面に対して、０．５ｍｍ以上２ｍｍ以下程度である。
なお、フィンは、導水溝３１、３３の全体に渡って又は部分的に設けてもよく、また、メニスカスの上方５０ｍｍの位置から、メニスカスの下方１５０ｍｍ位置までの範囲内に渡って全体的に、又は部分的に設けてもよい。なお、メニスカスは、長辺３０の上端から下方へ５０ｍｍ以上１５０ｍｍ以下の範囲内にある。 Further, as shown in FIGS. 4A and 4B, among the water guide grooves 31 to 33 formed by the space portion 20 of the long side 30 and the partition portions 22 and 23 of the back plate 13, You may provide the fins 34 and 35 which consist of a horizontal protrusion which increases cooling efficiency in the bottom part of the side part of the fastening means 12 located just under the meniscus of the adjacent water guide grooves 31 and 33. FIG. The long side 30 has the same configuration as the long side 10 except that the fins 34 and 35 are provided.
The fins 34 and 35 can be formed by moving, for example, a ball end mill (not shown) in the width direction of the long side 30 with respect to the bottom surface of the region where the water guide grooves 31 and 33 are formed. The fins 34 and 35 are formed in a wave shape when viewed from the side, and the vertical pitch P of the long side 30 is about 1 mm or more and 5 mm or less, and the depth D3 is a bottom surface before the fins 34 and 35 are formed. On the other hand, it is about 0.5 mm or more and 2 mm or less.
The fins may be provided over the entire water guide grooves 31 and 33 or partially, and over the entire range from the position 50 mm above the meniscus to the position 150 mm below the meniscus, Or you may provide partially. The meniscus is in the range of 50 mm or more and 150 mm or less downward from the upper end of the long side 30.

以上に示した長辺１０の裏面側（冷却面とは反対側）には、複数の締結手段１２、１２ａを使用して、例えば、ステンレス製のバックプレート１３（例えば、厚みが５０ｍｍ以上５００ｍｍ以下程度）が取付けられる。この取付けに際しては、バックプレート１３の周辺部に、バックプレート１３の給水部１５、排水部１９、及び長辺１０の導水溝１６〜１８を囲むように溝４０が形成され、ここにＯリング（図示しない）を配置することで、長辺１０とバックプレート１３の密着性を向上させ、導水溝１６〜１８からの冷却水の漏れを防止している。
この締結手段１２、１２ａは、長辺１０に形成されている雌ねじ部４１と、雌ねじ部４１に螺合してバックプレート１３を締着する雄ねじ（図示しない）を有している。また、雄ねじを取付けるため、バックプレート１３に形成された孔４２には、予め防水可能なシール座金が配置されており、雄ねじを取付けた部分からの冷却水の漏れを防止している。
この雌ねじ部４１は、バックプレート１３側へ突出しており、この先端面がバックプレート１３の孔４２が形成されている凹んだ凹面２４に当接している。 On the back side of the long side 10 shown above (the side opposite to the cooling surface), a plurality of fastening means 12, 12a are used, for example, a stainless steel back plate 13 (for example, a thickness of 50 mm or more and 500 mm or less). Degree) is attached. At the time of this attachment, a groove 40 is formed in the peripheral portion of the back plate 13 so as to surround the water supply portion 15, the drainage portion 19, and the water guide grooves 16 to 18 of the long side 10. (Not shown) improves the adhesion between the long side 10 and the back plate 13, and prevents leakage of cooling water from the water guide grooves 16-18.
The fastening means 12, 12 a has a female screw portion 41 formed on the long side 10 and a male screw (not shown) that is screwed into the female screw portion 41 to fasten the back plate 13. Further, in order to attach the male screw, a seal washer that can be waterproofed is disposed in advance in the hole 42 formed in the back plate 13 to prevent leakage of cooling water from the portion to which the male screw is attached.
The female thread portion 41 protrudes toward the back plate 13, and the front end surface is in contact with the concave surface 24 in which the hole 42 of the back plate 13 is formed.

また、長辺の表面（溶鋼面）には、コーティング層を形成してもよい。
コーティング層は、例えば、Ｃｏ−ＮｉのようなＣｏ合金、Ｎｉ−ＦｅのようなＮｉ合金、又はＮｉのめっきを使用できるが、溶射（例えば、ＮｉベースのＣｒ−Ｓｉ−Ｂ系合金）も使用できる。このコーティング層は、同一種類の成分を、長辺に使用する銅板の表面全面に渡って形成してもよく、また、複数種類の成分を、銅板の上下方向の異なる領域に、各成分の機能に応じてそれぞれ形成してもよい。
以上に示した長辺は、それぞれ銅板表面にコーティング層を形成した後、所定の形状を、従来公知の機械加工を行って製造する。
この長辺の形状は、一対の長辺の間隔を、スラブの引き抜き方向へ向けて同一としてもよいが、スラブの凝固収縮形状に応じて狭くすることが好ましい。 A coating layer may be formed on the long side surface (molten steel surface).
For example, a Co alloy such as Co—Ni, a Ni alloy such as Ni—Fe, or Ni plating can be used for the coating layer, but thermal spraying (eg, Ni-based Cr—Si—B alloy) is also used. it can. This coating layer may be formed over the entire surface of the copper plate used for the long sides of the same type of component, and multiple types of components may be formed in different areas in the vertical direction of the copper plate. It may be formed according to each.
Each of the long sides shown above is manufactured by forming a coating layer on the surface of the copper plate and then performing a conventionally known machining process on a predetermined shape.
As for the shape of the long side, the distance between the pair of long sides may be the same in the drawing direction of the slab, but it is preferable that the long side is narrowed according to the solidification shrinkage shape of the slab.

次に、本発明の作用効果を確認するため、ＦＥＭ解析（有限要素法を用いた解析）を行った結果について説明する。
ここで、従来例の長辺は、図６に示した形状であり、長辺を構成する銅板の裏面側一面に導水溝が形成され、銅板の溶鋼冷却面からバックプレートとの接触面までの厚みが厚いもの（２５ｍｍ）である。なお、銅板に形成した導水溝は、その深さが１３ｍｍ、幅が５ｍｍである。
一方、実施例の長辺は、図１（Ａ）、（Ｂ）、図２（Ａ）〜（Ｃ）、図３（Ａ）〜（Ｃ）に示した形状であり、長辺を構成する銅板の空間部が形成された部分の厚みＴ１が従来例の銅板よりも薄いもの（１３ｍｍ）である。なお、この銅板のメニスカス直下に位置する締結手段の側方部分の導水溝の内幅Ｗ１が９ｍｍ、深さＤ１が１０ｍｍ、また上下方向に隣り合う締結手段間の導水溝の内幅Ｗ２が２１ｍｍ、深さＤ２が４．５ｍｍである。 Next, the results of FEM analysis (analysis using the finite element method) for confirming the effects of the present invention will be described.
Here, the long side of the conventional example has the shape shown in FIG. 6, a water guide groove is formed on the back surface side of the copper plate constituting the long side, and from the molten steel cooling surface of the copper plate to the contact surface with the back plate. Thick (25 mm). In addition, the water guide groove formed in the copper plate has a depth of 13 mm and a width of 5 mm.
On the other hand, the long side of an Example is a shape shown to FIG. 1 (A), (B), FIG. 2 (A)-(C), and FIG. 3 (A)-(C), and comprises a long side. The thickness T1 of the part in which the space part of the copper plate is formed is thinner (13 mm) than the copper plate of the conventional example. The inner width W1 of the water guide groove at the side portion of the fastening means located directly below the meniscus of the copper plate is 9 mm, the depth D1 is 10 mm, and the inner width W2 of the water guide groove between the fastening means adjacent in the vertical direction is 21 mm. The depth D2 is 4.5 mm.

長辺のメニスカス位置での温度は、従来例が２６４℃、実施例が２６３℃であり、また、締結手段の側方部分での温度は、従来例が２７５℃、実施例が２６７℃であった。
このとき、長辺のメニスカス位置での最大変形量は、従来例が０．０８５ｍｍ、実施例が０．０５８ｍｍとなり、実施例の形状とすることで、長辺の変形量を従来例よりも大幅に低減できることを確認できた。
また、長辺のメニスカス位置での塑性ひずみ幅は、従来例が０．２８８％、実施例が０．１８４％であり、疲労寿命（クラックが発生するまでの繰り返し荷重がかかる回数）は、従来例が８４２回、実施例が１７７４回であった。
従って、従来例の疲労寿命を１とした場合、実施例では２．１１倍程度まで、疲労寿命を伸ばせることを確認できた。 The temperature at the meniscus position on the long side is 264 ° C. in the conventional example and 263 ° C. in the example, and the temperature at the side portion of the fastening means is 275 ° C. in the conventional example and 267 ° C. in the example. It was.
At this time, the maximum deformation amount at the meniscus position of the long side is 0.085 mm in the conventional example and 0.058 mm in the example. By adopting the shape of the example, the deformation amount of the long side is significantly larger than that in the conventional example. We were able to confirm that it can be reduced.
Further, the plastic strain width at the meniscus position on the long side is 0.288% in the conventional example and 0.184% in the example, and the fatigue life (the number of times a repeated load is applied until a crack is generated) is conventionally Example was 842 times and Example was 1774 times.
Therefore, when the fatigue life of the conventional example is 1, it was confirmed that the fatigue life can be extended to about 2.11 times in the example.

そして、長辺の熱変形に伴う締結手段の反力は、長辺の上端から１〜３段目の各締結手段の位置で、従来例が３３１０ｋｇ、５０７０ｋｇ、３２９０ｋｇ、実施例が３３７０ｋｇ、３２３０ｋｇ、２９００ｋｇであった。
このように、実施例での長辺の上端から２段目（メニスカス直下）の締結手段の反力を、従来例と比較して大幅に低減できるため、長辺をバックプレートに固定するための雄ねじの深さを浅くできることを確認できた。これにより、雄ねじのサイズを現状よりも小さくできるため、長辺の厚みを現状よりも薄くできることを確認できた。 And the reaction force of the fastening means accompanying the thermal deformation of the long side is the position of each fastening means in the first to third stages from the upper end of the long side, the conventional examples are 3310 kg, 5070 kg, 3290 kg, the examples are 3370 kg, 3230 kg, It was 2900 kg.
Thus, since the reaction force of the fastening means at the second stage (directly below the meniscus) from the upper end of the long side in the embodiment can be significantly reduced as compared with the conventional example, the long side is fixed to the back plate. It was confirmed that the depth of the male screw can be reduced. Thereby, since the size of the external thread can be made smaller than the current state, it has been confirmed that the thickness of the long side can be made thinner than the current state.

更に、長辺の厚みを薄くできることで、銅板内に形成される渦電流が抑制され、溶鋼の撹拌力を、従来例の１．９５倍程度まで向上できることを確認できた。なお、この値は、バックプレートの厚みを従来例と同じ厚みに設定した場合の結果である。
また、メニスカス直下に位置する締結手段の側方部分に、前記したフィンを設けた場合、銅板の冷却効率を更に高めることができることを確認できた。
以上のことから、本願発明の連続鋳造用鋳型を使用することで、熱応力及び導水溝構造によるメニスカスクラックの発生を抑制して、長寿命化を図れることを確認できた。 Furthermore, by reducing the thickness of the long side, eddy currents formed in the copper plate were suppressed, and it was confirmed that the stirring power of the molten steel could be improved to about 1.95 times that of the conventional example. In addition, this value is a result at the time of setting the thickness of a backplate to the same thickness as a prior art example.
Moreover, when the above-mentioned fin was provided in the side part of the fastening means located just under a meniscus, it has confirmed that the cooling efficiency of a copper plate could be improved further.
From the above, it was confirmed that by using the continuous casting mold of the present invention, the generation of meniscus cracks due to thermal stress and the water guide groove structure can be suppressed and the life can be extended.

以上、本発明を、実施の形態を参照して説明してきたが、本発明は何ら上記した実施の形態に記載の構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。例えば、前記したそれぞれの実施の形態や変形例の一部又は全部を組合せて本発明の連続鋳造用鋳型を構成する場合も本発明の権利範囲に含まれる。
また、前記実施の形態においては、長辺及び短辺を冷却部材としたが、短辺のみ、又は長辺のみを冷却部材としてもよい。
そして、前記実施の形態においては、鋳片の一例であるスラブを製造する鋳型の構成について説明したが、形状と寸法の異なる他の鋳片、例えば、ブルームを製造する鋳型に、本願発明を適用することも勿論可能である。 As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, the case where the continuous casting mold of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
Moreover, in the said embodiment, although the long side and the short side were used as the cooling member, it is good also considering only a short side or only a long side as a cooling member.
In the above embodiment, the structure of a mold for producing a slab, which is an example of a slab, has been described. However, the present invention is applied to another slab having a different shape and size, for example, a mold for producing a bloom. Of course, it is also possible.

（Ａ）は本発明の一実施の形態に係る連続鋳造用鋳型のメニスカス直下に位置する締結手段近傍の部分平断面図、（Ｂ）は同連続鋳造用鋳型の上下方向に隣り合う締結手段間の部分平断面図である。(A) is a partial plan sectional view in the vicinity of the fastening means located directly under the meniscus of the continuous casting mold according to one embodiment of the present invention, and (B) is between the fastening means adjacent in the vertical direction of the continuous casting mold. FIG. （Ａ）は同連続鋳造用鋳型の長辺の裏面側の説明図、（Ｂ）は（Ａ）のａ−ａ矢視断面図、（Ｃ）は（Ａ）のｂ−ｂ矢視断面図である。(A) is explanatory drawing of the back side of the long side of the mold for continuous casting, (B) is a sectional view taken along the line aa of (A), and (C) is a sectional view taken along the line bb of (A). It is. （Ａ）は同連続鋳造用鋳のバックプレートの正面側の説明図、（Ｂ）は（Ａ）のｃ−ｃ部分矢視断面図、（Ｃ）は（Ａ）のｄ−ｄ部分矢視断面図である。(A) is explanatory drawing of the front side of the back plate of the casting for continuous casting, (B) is a cc partial arrow sectional view of (A), (C) is a dd partial arrow of (A). It is sectional drawing. （Ａ）は変形例に係る長辺の裏面側の部分拡大図、（Ｂ）は（Ａ）のｅ−ｅ矢視断面図である。(A) is the elements on larger scale of the back side of the long side concerning a modification, (B) is an ee arrow sectional view of (A). 従来例に係る連続鋳造用鋳型の平面図である。It is a top view of the casting mold for continuous casting which concerns on a prior art example. （Ａ）は同連続鋳造用鋳型の長辺の裏面側の説明図、（Ｂ）は（Ａ）のｆ−ｆ矢視断面図、（Ｃ）は（Ａ）のｇ−ｇ矢視断面図である。(A) is explanatory drawing of the back side of the long side of the casting mold for continuous casting, (B) is a sectional view taken along arrow ff in (A), and (C) is a sectional view taken along arrow gg in (A). It is.

符号の説明Explanation of symbols

１０、１１：長辺（冷却部材）、１２、１２ａ：締結手段、１３、１４：バックプレート（支持部材）、１５：給水部、１６〜１８：導水溝、１９：排水部、２０：空間部、２１：固定部、２２、２３：仕切り部、２４：凹面、３０：長辺、３１〜３３：導水溝、３４、３５：フィン、４０：溝、４１：雌ねじ部、４２：孔 10, 11: Long side (cooling member), 12, 12a: Fastening means, 13, 14: Back plate (support member), 15: Water supply part, 16-18: Water guide groove, 19: Drain part, 20: Space part , 21: fixing part, 22, 23: partition part, 24: concave surface, 30: long side, 31-33: water guide groove, 34, 35: fin, 40: groove, 41: female screw part, 42: hole

Claims (3)

間隔を有して対向配置された一対の短辺と、該短辺を幅方向両側から挟み込んだ状態で対向配置された一対の長辺と、前記短辺及び前記長辺の裏面側にそれぞれ上下方向に並べて配置された複数の締結手段を備えた締結手段群によってそれぞれ固定された支持部材とを有し、該支持部材に設けられた給水部及び排水部を介して、前記短辺及び前記長辺の裏面側に設けられた多数の導水溝に冷却水を流すことで、前記短辺及び前記長辺の冷却を行うと共に溶鋼の冷却を行って鋳片を製造する連続鋳造用鋳型において、
前記短辺又は前記長辺を構成する冷却部材の裏面側に設けられた前記導水溝は、該冷却部材の幅方向に隣り合う前記締結手段群の間に形成された空間部と、前記冷却部材の裏面側に向けて突出して、その先端面が前記冷却部材の前記空間部の底面に当接する仕切り部が設けられた前記支持部材とで形成され、
しかも前記導水溝のうち、少なくとも前記冷却部材のメニスカス直下に位置する前記締結手段の側方部分の前記導水溝に対して、該側方部分の該導水溝の内幅を、上下方向に隣り合う前記締結手段間の前記導水溝の内幅よりも狭くし、かつ前記側方部分の前記導水溝の深さを、上下方向に隣り合う前記締結手段間の前記導水溝の深さよりも深くし、
更に、前記締結手段の側方部分の前記導水溝の平断面積を、上下方向に隣り合う前記締結手段間の前記導水溝の平断面積の−２０％以上＋２０％以下の範囲内としたことを特徴とする連続鋳造用鋳型。 A pair of short sides opposed to each other with a gap, a pair of long sides opposed to each other with the short sides sandwiched from both sides in the width direction, and the short side and the back side of the long side And a support member fixed by a fastening means group having a plurality of fastening means arranged side by side in the direction, and the short side and the long side through a water supply part and a drain part provided in the support member. In a continuous casting mold for producing a slab by cooling the molten steel while cooling the short side and the long side by flowing cooling water through a large number of water guide grooves provided on the back side of the side,
The water guide groove provided on the back surface side of the cooling member constituting the short side or the long side is a space formed between the fastening means groups adjacent in the width direction of the cooling member, and the cooling member Projecting toward the back side of the cooling member, and the front end surface of the cooling member is formed with the support member provided with a partition portion that contacts the bottom surface of the space portion,
Moreover among the water guide groove, relative to the water guide groove of the side portions of said fastening means located on the meniscus immediately below at least the cooling member, the inner width of the water conducting grooves of said side portions, adjacent in the vertical direction Narrower than the inner width of the water guide groove between the fastening means, and the depth of the water guide groove of the side portion is deeper than the depth of the water guide groove between the fastening means adjacent in the vertical direction,
Furthermore, the plane cross-sectional area of the water guide groove at the side portion of the fastening means is in the range of -20% to + 20% of the cross-sectional area of the water guide groove between the fastening means adjacent in the vertical direction. A mold for continuous casting characterized by 請求項１記載の連続鋳造用鋳型において、少なくとも前記冷却部材のメニスカス直下に位置する前記締結手段の側方部分の前記導水溝の底部に、冷却効率を増大させる水平突起からなるフィンを設けることを特徴とする連続鋳造用鋳型。 2. The continuous casting mold according to claim 1, wherein at least a fin made of a horizontal protrusion for increasing cooling efficiency is provided at a bottom portion of the water guide groove at a side portion of the fastening means located immediately below the meniscus of the cooling member. Features a continuous casting mold. 請求項２記載の連続鋳造用鋳型において、前記メニスカスは、前記冷却部材の上端から下方へ５０ｍｍ以上１５０ｍｍ以下の範囲内にあり、しかも前記フィンを、該メニスカスの上方５０ｍｍの位置から、該メニスカスの下方１５０ｍｍ位置までの範囲内に設けることを特徴とする連続鋳造用鋳型。 3. The continuous casting mold according to claim 2, wherein the meniscus is in a range of 50 mm or more and 150 mm or less downward from an upper end of the cooling member, and the fin is moved from a position of 50 mm above the meniscus to the meniscus. A casting mold for continuous casting, which is provided within a range up to a position of 150 mm below.

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