JPS6250066A - Mold for building up by continuous tinkering - Google Patents
Mold for building up by continuous tinkeringInfo
- Publication number
- JPS6250066A JPS6250066A JP18916185A JP18916185A JPS6250066A JP S6250066 A JPS6250066 A JP S6250066A JP 18916185 A JP18916185 A JP 18916185A JP 18916185 A JP18916185 A JP 18916185A JP S6250066 A JPS6250066 A JP S6250066A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- mold
- graphite
- jacket
- molten metal
- 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.)
- Pending
Links
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は連続鋳かけ肉盛用モールドに係わるものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mold for continuous casting overlay.
連続鋳かけ肉盛用の冷却モールドとして、冷却ジャケッ
トの内面に黒鉛ライニングを設けることは、特公昭52
−2846号公報に記載されている。Providing a graphite lining on the inner surface of the cooling jacket as a cooling mold for continuous casting overlay was introduced in 1986.
It is described in the publication No.-2846.
この黒鉛ライニングは肉盛層の部分を緩やかに冷却する
点においては顕著に効果があるが、肉盛層の部分に横割
が発生するという欠点があった。Although this graphite lining is extremely effective in slowly cooling the built-up layer, it has the disadvantage that horizontal splits occur in the built-up layer.
横割れの修復は非常に困難であり、材質によっては不可
能である。Repairing transverse cracks is extremely difficult and impossible depending on the material.
本発明の目的は肉盛層の横割れを防止することができる
、肉盛用モールドの新規な構造を提供することである。An object of the present invention is to provide a new structure of a build-up mold that can prevent horizontal cracking of the build-up layer.
本発明者は、肉盛層の横割れの防止に関して鋭意研究を
行った結果、次のような新しい知見を得るに敗った。As a result of intensive research into the prevention of lateral cracks in built-up layers, the present inventors were unable to obtain the following new knowledge.
即ち、水冷式ジャケットの内面に黒鉛系材料から成るス
リーブを嵌入すると共に、このスリーブの上端面をジャ
ケットの上面よりも上位に伸ばして、突出させ、耐火性
枠は、この突出させたスリーブの上に載置するような構
造にすると、肉盛層の横割れを防止することができるこ
とを見出した。That is, a sleeve made of graphite material is fitted into the inner surface of a water-cooled jacket, and the upper end surface of this sleeve is extended above the upper surface of the jacket to protrude, and the fireproof frame is placed above the protruding sleeve. It has been found that horizontal cracking of the built-up layer can be prevented by creating a structure in which it is placed on the cladding layer.
本発明は以上の知見に基づいてなされたものである。The present invention has been made based on the above findings.
肉盛層の横割れ発生の理由は必ずしも明確ではないが、
次のような利用によるものと推察される。Although the reason for the occurrence of horizontal cracks in the overlay layer is not necessarily clear,
It is assumed that this is due to the following usage.
すなわち、横割れは凝固シェルの生育が未成熟な部分で
発生しやすいので、成長し始める点の近傍におけるシェ
ルの摺動性が低いと横割れが多発することになる。具体
的に言うと、凝固シェルの生育が黒鉛スリーブの内面に
おいて発生する限りは十分な摺動があるので、横割れは
発生しない。しかしシェルの始点が黒鉛スリーブの上端
を越えて耐火性枠まで達すると、そこで凝固シェルの成
育が始まり、摺動性も高くないので、横割れが起る。That is, since transverse cracks are likely to occur in areas where the growth of the solidified shell is immature, if the slidability of the shell near the point where growth begins is low, transverse cracks will occur frequently. Specifically, as long as the growth of the solidified shell occurs on the inner surface of the graphite sleeve, there will be sufficient sliding, and no transverse cracking will occur. However, when the starting point of the shell exceeds the upper end of the graphite sleeve and reaches the refractory frame, the solidified shell begins to grow there, and since the sliding properties are not high, transverse cracking occurs.
ところが黒鉛スリーブの上端を水冷ジャケットの上面よ
り上方に延在させると、仮に凝固シェルの成育点がジャ
ケットの上方に来ても黒鉛スリーブがあって摺動性が良
いので、横割れは発生しない。またかかる黒鉛スリーブ
の上端は加熱コイルに近いので十分に温度が高く、それ
より凝固シェルが上方に行くことはない。このようにし
て凝固は常に黒鉛スリーブの範囲で始まるように設定す
るとかでき、十分な摺動性のため横割れが防止できる。However, if the upper end of the graphite sleeve extends above the upper surface of the water-cooling jacket, even if the growth point of the solidified shell is above the jacket, the graphite sleeve provides good sliding properties and no transverse cracking occurs. Further, since the upper end of the graphite sleeve is close to the heating coil, the temperature is sufficiently high, and the solidified shell does not go above the upper end. In this way, solidification can be set to always begin in the area of the graphite sleeve, and transverse cracking can be prevented due to sufficient sliding properties.
以上は本発明の作用の理由と考えられる理論であるが、
本発明はかかる理論に拘束されるものではないことに注
意すべきである。The above is the theory that is considered to be the reason for the action of the present invention,
It should be noted that the present invention is not bound by such theory.
本発明を図面を参照して詳細に説明する。 The present invention will be explained in detail with reference to the drawings.
第1図に示すように、本発明の肉盛モールドは円環状の
耐火性枠lと、その下に同軸的に連結された円環状の黒
鉛系スリーブ2と、スリーブ2の一部を包囲する円環状
の水冷ジャケット3とを有する。また耐火性枠1の外周
には誘導加熱コイル4が設けられている。これらの部品
から形成されるモールド中央の垂直円筒状空間内を肉盛
すべき円筒母材5が適当な駆動装置(図示せず)により
降下する。円筒母材5とモールド内壁とのギャップは肉
盛量に相当する。As shown in FIG. 1, the overlay mold of the present invention surrounds an annular fireproof frame l, an annular graphite sleeve 2 coaxially connected below it, and a part of the sleeve 2. It has an annular water cooling jacket 3. Further, an induction heating coil 4 is provided on the outer periphery of the fireproof frame 1. A cylindrical base material 5 to be overlaid is lowered within the vertical cylindrical space at the center of the mold formed by these parts by a suitable drive device (not shown). The gap between the cylindrical base material 5 and the inner wall of the mold corresponds to the amount of overlay.
肉盛作業は以下の通り行われる。まずモールド空間内に
母材5を設置し、所定の垂直位置に設定した後取鍋から
溶湯6をモールドと母材のギャップに注入する。注入さ
れた溶湯はコイル4により攪拌され、母材5と溶着する
。溶湯の下方は水冷ジャケットにより冷却され凝固する
。母材5は除徐に降下するので、肉盛は連続的に行われ
る。Overlay work is carried out as follows. First, the base material 5 is installed in the mold space, and after setting it at a predetermined vertical position, molten metal 6 is poured from a ladle into the gap between the mold and the base material. The injected molten metal is stirred by the coil 4 and welded to the base material 5. The lower part of the molten metal is cooled by a water cooling jacket and solidified. Since the base material 5 gradually descends, overlaying is performed continuously.
本発明のモールドにおいては、黒鉛系スリーブ2は水冷
ジャケット3の上面より上方に延び、加熱コイル4の近
傍にまで達しているので、溶湯の凝固は常に黒鉛系スリ
ーブ2の領域で開始する。In the mold of the present invention, the graphite-based sleeve 2 extends upward from the upper surface of the water-cooling jacket 3 and reaches the vicinity of the heating coil 4, so that solidification of the molten metal always starts in the region of the graphite-based sleeve 2.
黒鉛系スリーブ2の摺動性は極めて良いので、凝固が開
始する際の横割れの発生は抑えられる。Since the graphite-based sleeve 2 has extremely good sliding properties, the occurrence of transverse cracks when solidification starts can be suppressed.
以上のような構成により、本発明のモールドを使用する
と、横割れのない肉盛を行うことができる。また凝固が
常に摺動性のよい黒鉛系スリーブ2上で起るので、肉盛
層表面は非常に平滑となる。With the above configuration, when the mold of the present invention is used, overlaying without horizontal cracking can be performed. Furthermore, since solidification always occurs on the graphite-based sleeve 2 which has good sliding properties, the surface of the built-up layer becomes extremely smooth.
さらに凝固組織のムラも少なくなる。Furthermore, the unevenness of the coagulation structure is also reduced.
第1図は本発明のモールドの断面概略図である。
■・・・耐火性枠、2・・・黒鉛系スリーブ、3・・・
水冷ジャケット、4・・・誘導加熱コイル、5・・・母
材、6・・・溶湯。FIG. 1 is a schematic cross-sectional view of the mold of the present invention. ■... Fireproof frame, 2... Graphite sleeve, 3...
Water cooling jacket, 4... Induction heating coil, 5... Base material, 6... Molten metal.
Claims (1)
下に同軸的に設置された水冷式ジャケットとを有する連
続鋳かけ肉盛用モールドにおいて、該ジャケットの内面
に黒鉛系材料から成るスリーブが嵌入され、該スリーブ
の上面が該ジャケットの上面より上位に伸ばされて突出
していることを特徴とする連続鋳かけ肉盛用モールド。In a continuous casting overlay mold having a refractory frame surrounded by an induction heating coil on the outside and a water-cooled jacket coaxially installed below the frame, the inner surface of the jacket is made of graphite-based material. 1. A mold for continuous casting overlay, characterized in that a sleeve is fitted into the mold, and the upper surface of the sleeve is extended and protrudes above the upper surface of the jacket.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18916185A JPS6250066A (en) | 1985-08-28 | 1985-08-28 | Mold for building up by continuous tinkering |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18916185A JPS6250066A (en) | 1985-08-28 | 1985-08-28 | Mold for building up by continuous tinkering |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6250066A true JPS6250066A (en) | 1987-03-04 |
Family
ID=16236474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18916185A Pending JPS6250066A (en) | 1985-08-28 | 1985-08-28 | Mold for building up by continuous tinkering |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6250066A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52152828A (en) * | 1976-06-14 | 1977-12-19 | Fuji Kogyosho Kk | Method of continuous injection coating by utilizing electromagnetic induction heat |
-
1985
- 1985-08-28 JP JP18916185A patent/JPS6250066A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52152828A (en) * | 1976-06-14 | 1977-12-19 | Fuji Kogyosho Kk | Method of continuous injection coating by utilizing electromagnetic induction heat |
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