JP2948671B2 - Continuous casting method and continuous casting apparatus for annular steel products - Google Patents
Continuous casting method and continuous casting apparatus for annular steel productsInfo
- Publication number
- JP2948671B2 JP2948671B2 JP6072391A JP6072391A JP2948671B2 JP 2948671 B2 JP2948671 B2 JP 2948671B2 JP 6072391 A JP6072391 A JP 6072391A JP 6072391 A JP6072391 A JP 6072391A JP 2948671 B2 JP2948671 B2 JP 2948671B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- conveyor
- annular
- continuous casting
- 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 - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、低炭素鋼製の環状部材
を工業的に生産するための鋳造方法、および鋳造装置に
係り、径寸法数百ミリメートル程度の、一様な厚さ（十
数ミリメートル程度）の座金状の製品を連続的に鋳造す
るに好適な鋳造方法、並びに鋳造装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method and a casting apparatus for industrially producing an annular member made of low carbon steel. The present invention relates to a casting method and a casting apparatus suitable for continuously casting a washer-shaped product (about several millimeters).
【０００２】[0002]
【従来の技術】図２は本発明の方法および装置を適用し
て製造する対象である低炭素鋼製の環状部材の例を示し
た２面図であって、同図（Ａ）は正面図、同図（Ｂ）は
その断面図である。その寸法は例えば次のごとくであ
る。2. Description of the Related Art FIG. 2 is a two-sided view showing an example of an annular member made of low-carbon steel to be manufactured by applying the method and apparatus of the present invention, and FIG. FIG. 2B is a cross-sectional view thereof. The dimensions are, for example, as follows.
【０００３】 （単位 mm） 呼び径 Ｄ ｄ Ｗ Ｔ ３００ ２９９ １８０ ５９.５ １２〜１６ ３５０ ３４９ ２３０ ５９.５ １２〜１６ ４００ ３９９ ２７０ ６４.５ １２〜１６ ４５０ ４４９ ３１０ ６９.５ １６ ５００ ４９９ ３４０ ７９.５ １６ ６００ ５９９ ４２０ ８９.５ １６〜１９ 従来一般に、この種の製品を製造するには、前記のＴ欄
に示した厚さを有する低炭素鋼板をプレスで打ち抜いた
り溶断したりしていた。しかし乍ら、平板からリング状
部材を打ち抜いた場合、歩留りが悪くて不経済である。
その上、この例のように厚さ寸法１２mm〜１９mmの鋼板
を打ち抜く作業は容易でない。また、溶断した場合は切
口が綺麗でないため仕上げ加工を必要とする。(Unit: mm) Nominal diameter D d WT 300 299 180 59.5 12 to 16 350 349 230 59.5 12 to 16 400 399 270 64.5 12 to 16 450 449 310 69.5 16 500 500 499 340 79.5 16 600 599 420 89.5 16-19 Conventionally, generally, in order to manufacture this kind of product, a low-carbon steel sheet having a thickness shown in the above-mentioned T column is punched out or melted by a press. Was. However, when a ring-shaped member is punched from a flat plate, the yield is poor and uneconomical.
In addition, it is not easy to punch a steel plate having a thickness of 12 mm to 19 mm as in this example. In the case of fusing, finishing is required because the cut is not clean.
【０００４】プレス作業や溶断作業をせずに、ほぼ所望
の寸法，形状の製品を得る技術として鋳造がある。図３
は、単純な形状の鋳鋼製品の１例としてフランジ付き鋼
管を鋳造する装置を示す模式的な断面図である。模式化
して描いてあるので寸法割合などは必ずしも実例のとお
りではない。型枠１の中に上型２と下型３とが収められ
ており、その間に中子４が配置されている。[0004] Casting is a technique for obtaining a product having a substantially desired size and shape without performing a pressing operation or a fusing operation. FIG.
FIG. 1 is a schematic sectional view showing an apparatus for casting a flanged steel pipe as an example of a cast steel product having a simple shape. Since it is schematically drawn, the dimensional ratios and the like are not necessarily as in the actual example. An upper mold 2 and a lower mold 3 are housed in a mold frame 1, and a core 4 is arranged between them.
【０００５】上記上型２と下型３との間に、溶湯が注入
されて目的形状となるキャビティ５が形成されている。
６は湯口，７は湯溜りである。さらに溶湯が凝固する際
の収縮を補うように押湯８が設けられている。[0005] Between the upper mold 2 and the lower mold 3, a cavity 5 into which a molten metal is injected and which has a desired shape is formed.
Reference numeral 6 denotes a gate, and reference numeral 7 denotes a pool. Further, a feeder 8 is provided to compensate for shrinkage when the molten metal solidifies.
【０００６】鋳造技術はその歴史が古く、種々の工夫が
為されてきており、上掲の図３に示した構成の他に、溶
湯をキャビティに導くための水平な湯道や、湯道からキ
ャビティに流入する溶湯の不純物を除去するための堰
（せき）などが設けられる場合が多い。その他、健全な
製品を得るために冷し金を設けたり、余肉を付したり、
ガス抜きを設けたりする場合も少なくない。The casting technique has a long history, and various ideas have been devised. In addition to the configuration shown in FIG. 3 described above, a horizontal runner for guiding the molten metal into the cavity, or a runner from the runner is used. In many cases, weirs or the like for removing impurities of the molten metal flowing into the cavity are provided. In addition, in order to obtain a healthy product, provide a chill, add extra meat,
In many cases, venting is provided.
【０００７】[0007]
【発明が解決しようとする課題】前掲の図３について説
明した従来例の鋳造技術は、その構造も手順も非常に複
雑である。しかし乍ら、鋳造品の形状を所望のごとく仕
上げるため、および、鋳造欠陥の無い健全な鋳造品質を
得るため、従来技術においては斯うした構成を必要とし
た。前記の従来技術（図３）においては、１個の製品を
鋳造する度に上型２および下型３よりなる鋳型を毀して
製品を取り出さなければならない。このように鋳型を毀
すことは鋳型製造コスト分だけ製品コストを上げる上
に、型ばらしと俗称される鋳型破壊除去作業は多大の時
間と労力とを要し、しかもこの作業は著しい苦渋作業で
ある。前述のように１個の製品を鋳造する度に型ばらし
をしなければならないので、鋳造作業を連続的に行うこ
とができない。（鋼板のように極めて単純な形状の長尺
な製品については連続鋳造・圧延の普及が技術的趨勢に
あるが、図２に示したような個々の単品を連続的に多数
鋳造することは不可能とされていた）。The conventional casting technique described with reference to FIG. 3 is extremely complicated in structure and procedure. However, in order to finish the shape of the casting as desired and to obtain a sound casting quality free of casting defects, the prior art required such a configuration. In the above-mentioned conventional technique (FIG. 3), each time one product is cast, the product including the upper mold 2 and the lower mold 3 must be damaged to take out the product. Damaging the mold in this way increases the product cost by the mold manufacturing cost, and the mold destruction and removal work commonly called mold separation requires a great deal of time and labor. is there. As described above, since the mold must be separated each time one product is cast, the casting operation cannot be performed continuously. (For a long product with a very simple shape such as a steel plate, there is a technical trend to spread the continuous casting and rolling. However, it is not possible to continuously cast a large number of individual products as shown in Fig. 2. Was possible).
【０００８】図３について説明した従来例の鋳造技術を
適用する場合の技術的な難易度は、その材質によって異
なる。鉄鋼材料の範囲内で見た場合、鋳鉄が最も容易で
あり鋼鉄は困難である。鋼鉄について更に詳しく見る
と、高炭素鋼に比して低炭素鋼は鋳込時の凝固温度が高
いため凝固し易いので、含有不純物の浮上分離が困難で
ある。このため鋳造欠陥を生じ易く、低炭素鋼の鋳込み
は困難とされている。The technical difficulty in applying the conventional casting technique described with reference to FIG. 3 differs depending on the material. When viewed within the range of steel materials, cast iron is the easiest and steel is the hardest. Looking at steel in more detail, low-carbon steel has a higher solidification temperature at the time of casting and is thus easily solidified as compared with high-carbon steel, so that it is difficult to float and separate contained impurities. For this reason, casting defects are likely to occur, and casting of low carbon steel is considered to be difficult.
【０００９】最近の鋳造技術の進歩に伴って、低加圧鋳
造法や、真空鋳造法や、各種の精密鋳造法（例えばロス
トワックス法，シェルモールド法など）が実用化されて
いる。しかし乍ら、低炭素鋼の鋳造に関する前述の不具
合は解消されていない。With the recent development of casting technology, low pressure casting, vacuum casting, and various precision casting methods (eg, lost wax method, shell mold method, etc.) have been put to practical use. However, the above-mentioned disadvantages related to casting of low carbon steel have not been solved.
【００１０】さらに、図３から容易に理解されるよう
に、鋳型を破壊して取り出した鋳造品は、押湯８や湯溜
り７の中で凝固した材料が連結された状態になってお
り、これらを切断，除去して切口を仕上げなければなら
ないので、いっそう手数を要し、鋳造コストを上昇させ
ている。こうした諸問題が有るため、最近の従来技術に
おいて図２に示したような形状の低炭素鋼製の部材を経
済的に生産するにはプレス打抜もしくは溶断が用いられ
ている。Further, as can be easily understood from FIG. 3, the cast product obtained by destroying the mold has a state in which the material solidified in the feeder 8 and the pool 7 is connected. Since these need to be cut and removed to finish the cut, more trouble is required and the casting cost is increased. Due to these problems, press punching or fusing is used in recent prior art to economically produce a member made of low carbon steel having a shape as shown in FIG.
【００１１】しかし乍ら、図３に示した従来例はフラン
ジ付きの管状部材の鋳造である。一方、図２に示した環
状部材は、このフランジ付き管状部材に比して単純な形
状の部材である。このように単純な形状の部材を鋳造す
る場合、図３に示した複雑な鋳造方案および手順をその
まま適用することは不合理である。こうした観点から検
討し直してみると、従来技術においては例えば図２に示
したような単純な形状の低炭素鋼部材を鋳造するに適し
た鋳造技術の開発が盲点になっていたことに気付く。However, the prior art shown in FIG. 3 is a casting of a flanged tubular member. On the other hand, the annular member shown in FIG. 2 is a member having a simpler shape than this tubular member with a flange. When casting a member having such a simple shape, it is irrational to apply the complicated casting method and procedure shown in FIG. 3 as it is. When reexamined from such a viewpoint, it is noticed that the development of a casting technique suitable for casting a low-carbon steel member having a simple shape as shown in FIG.
【００１２】このように単純に製品を鋳造する際は、必
ずしも押湯８や湯溜り７を設けなくても、鋳造欠陥を防
止するための、より簡単な技術が有って然るべきである
と考えられる。In the case of simply casting a product as described above, it is considered that there is a simpler technique for preventing casting defects without necessarily providing the feeder 8 and the pool 7. Can be
【００１３】本発明は上述の考察に基づいて為されたも
のであって、環状の低炭素鋼製品を自動的に、かつ連続
的に、しかも鋳造欠陥を生ぜしめるおそれ無く鋳造する
方法および同装置を提供すること、特に、簡単な装置を
用いて迅速かつ容易に溶湯中の不純物を除去して健全な
組織の製品を得ることができ、しかも材料歩留りの優れ
た技術を提供することを目的とするものである。The present invention has been made based on the above considerations, and a method and apparatus for automatically and continuously casting an annular low-carbon steel product without fear of causing casting defects. In particular, it is an object of the present invention to provide a technology capable of quickly and easily removing impurities in a molten metal using a simple device to obtain a product having a healthy structure, and also having an excellent material yield. Is what you do.
【００１４】[0014]
【課題を解決するための手段】上記の目的を解決するた
め、本発明に係る環状鋼製品の連続鋳造方法は、上方開
放形の鋳型を無端環状コンベアに取付けて搬送しつつ、
上記の鋳型に設けられている環状溝形の凹部内へ、溶融
された低炭素鋼を注湯し、前記無端環状コンベアの運転
に伴って移動している鋳型中の溶湯をバーナーで補熱し
て徐冷することにより凝固時期を遅延させ、該溶湯が凝
固するまでの間に含有ガス，含有不純物，及び非金属介
在物の少なくとも何れかを浮上せしめ、前記鋳型の環状
溝形の凹部内で凝固した製品素材を、該鋳型を破壊する
ことなく取り出して、環状の鋼製品を得ることを特徴と
する。SUMMARY OF THE INVENTION In order to solve the above-mentioned object, a continuous casting method for an annular steel product according to the present invention is provided.
The molten low-carbon steel is poured into the annular groove-shaped concave portion provided in the mold, and the molten metal in the mold moving along with the operation of the endless annular conveyor is heated by a burner. By slow cooling, the solidification time is delayed, and by the time the molten metal solidifies, at least one of the contained gas, the contained impurities, and the nonmetallic inclusions is raised, and solidified in the annular groove-shaped recess of the mold. The product material thus obtained is taken out without breaking the mold to obtain an annular steel product.
【００１５】上記の方法を実施するために創作した本発
明の連続鋳造装置は、無端環状のコンベアと、上記コン
ベアに取付けられた複数の上方開方形の鋳型と、上記鋳
型に設けられた環状溝形の凹部と、上記鋳型の環状溝形
の凹部に溶解した低炭素鋼を注湯する溶解炉と、低炭素
鋼を注湯され前記コンベアによって搬送されている鋳型
内の溶湯を保温して徐冷する手段とを具備していること
を特徴とする。[0015] The continuous casting apparatus of the present invention created for carrying out the above method comprises an endless annular conveyor, a plurality of upper open square molds attached to the conveyor, and an annular groove provided in the mold. And a melting furnace for pouring low-carbon steel melted in the annular groove-shaped concave portion of the mold, and gradually keeping the molten metal in the mold which is poured with low-carbon steel and conveyed by the conveyor. Cooling means.
【００１６】[0016]
【作用】前記の本発明方法によれば、 ａ．鋳型に設けられた環状の凹部が上方に露出している
ので、この中へ容易に注湯することができる。注湯の開
始，進行，完了を容易に行い得るということは、この操
作の自動化，連続化に適することを意味している。According to the method of the present invention, a. Since the annular concave portion provided in the mold is exposed upward, the molten metal can be easily poured into the concave portion. The fact that pouring can be started, proceeded, and completed easily means that this operation is suitable for automation and continuous operation.
【００１７】ｂ．前記環状凹部に注湯された溶湯は、ほ
ぼ目的どおりの形状，寸法となり、上面が大気に開放さ
れている上に、高さ寸法が比較的小さいので、溶湯中の
不純物の上昇が容易である。B. The molten metal poured into the annular recess has a shape and dimensions almost as intended, and the upper surface is open to the atmosphere and the height is relatively small, so that impurities in the molten metal can easily rise. .
【００１８】ｃ．さらに、鋳込まれた溶湯が保温され
て、凝固するまでの時間が遅延されるので、溶湯中のガ
ス，不純物、非金属介在物の上昇が充分に行われ、環状
溝形の凹部内の溶湯は健全な組成のものになって凝固す
る。C. Further, since the time until the cast molten metal is kept warm and solidified is delayed, gas, impurities and nonmetallic inclusions in the molten metal are sufficiently raised, and the molten metal in the annular groove-shaped concave portion is sufficiently raised. Has a sound composition and solidifies.
【００１９】ｄ．掻き取られた溶湯は、再び溶解炉にリ
サイクルすることができるので、装置全体としての材料
歩留りが非常に高い。D. Since the scraped-off molten metal can be recycled to the melting furnace again, the material yield of the entire apparatus is very high.
【００２０】ｅ．環状溝内で凝固した環状の製品は、鋳
型を破壊しなくても取り出すことが出来るので、迅速，
容易，かつ連続的に製品取出作業が行われ、しかも鋳型
を繰り返し使用し得る。E. The annular product solidified in the annular groove can be taken out without breaking the mold.
The product can be easily and continuously taken out, and the mold can be used repeatedly.
【００２１】ｆ．上記の、繰返し使用可能な鋳型が、無
端環状コンベアに取付けて搬送されるので、これを循環
せしめて連続的に操業することができる。F. Since the above-mentioned mold that can be used repeatedly is mounted on the endless annular conveyor and conveyed, it can be circulated and operated continuously.
【００２２】また、前記の本発明装置によれば、無端環
状のコンベアと、上記コンベアに取付けられた複数の上
方開方形の鋳型と、上記鋳型に設けられた環状溝形の凹
部と、上記鋳型の環状溝形の凹部に溶解した低炭素鋼を
注湯する溶解炉と、低炭素鋼を注湯され前記コンベアに
よって搬送されている鋳型内の溶湯を保温して徐冷する
手段とを具備しているので、前記の発明方法を容易に実
施することができる。Further, according to the apparatus of the present invention, an endless annular conveyor, a plurality of upwardly open square molds attached to the conveyor, an annular groove-shaped recess provided in the mold, A melting furnace for pouring low-carbon steel melted into the annular groove-shaped concave portion, and a means for keeping the molten metal in the mold, which is poured with low-carbon steel and conveyed by the conveyor, to gradually cool the molten metal. Therefore, the above-described invention method can be easily implemented.
【００２３】[0023]
【実施例】図１は本発明に係る連続鋳造装置の１実施例
を示す模式図である。模式化して描いてあるので、各構
成部材の形状，寸法は必ずしも実施例の現物を縮尺した
ものではない。図示の９は無端環状のチェーンコンベア
で、二十数個のセラミック鋳型を取付けてある。本図に
おいては、その代表例として鋳型１０ａ〜同１０ｅを描
いてある。これらのセラミック鋳型には環状の溝形凹部
を設けてあり、図示の鋳型の内で鋳型１０ｅ，同１０
ａ，同１０ｂは該環状溝形の凹部を上方に向けた姿勢に
なっている。無端環状コンベア９を運転すると、これら
の鋳型１０ｂ，１０ａ，１０ｅは矢印ａのごとく進行
し、矢印ｂのごとく反転する。このため、図示の鋳型１
０ｃ，１０ｄは溝形凹部を下に向けている。FIG. 1 is a schematic view showing one embodiment of a continuous casting apparatus according to the present invention. Since the components are schematically drawn, the shapes and dimensions of the respective constituent members are not necessarily reduced to the actual size of the embodiment. Reference numeral 9 denotes an endless annular chain conveyor on which twenty or more ceramic molds are mounted. In the figure, the molds 10a to 10e are drawn as typical examples. These ceramic molds are provided with annular groove-shaped concave portions, and among the illustrated molds, molds 10e and 10e are provided.
10a and 10b are in a posture in which the annular groove-shaped concave portion is directed upward. When the endless annular conveyor 9 is operated, these molds 10b, 10a, and 10e advance as indicated by an arrow a and are reversed as indicated by an arrow b. For this reason, the illustrated mold 1
Reference numerals 0c and 10d point the groove-shaped concave portions downward.
【００２４】図示の１１は溶解炉である。本例の溶解炉
は鉄工工場に設けられていて自工場で発生した低炭素鋼
スクラップを溶解する電磁誘導形の電気炉である。本発
明を実施する際、本例のように自工場発生スクラップを
原料にすると、溶湯の組成コントロールが容易で好都合
であるが、必ずしも自工場スクラップを原料としなけれ
ばならぬものではない。また、本発明を実施する際、溶
解炉は電気炉に限られるものではなく、平炉，転炉，坩
堝炉なども適用し得る。しかし、不純物，介在物の混入
が少なく、操炉のコントロールを半自動化し易いといっ
た観点から見ると電気炉であることが望ましい。１１ａ
は上記溶解炉１１の出湯口であって、前記の環状溝形の
凹部に沿って回転せしめ得る構造になっており、コンピ
ュータ制御されるシャッタ１１ｂを備えている。Reference numeral 11 denotes a melting furnace. The melting furnace of this example is an electromagnetic induction type electric furnace provided in an ironworks and melting low-carbon steel scrap generated in its own factory. When carrying out the present invention, if the scrap generated at the own factory is used as a raw material as in this example, the composition control of the molten metal is easy and convenient, but the scrap at the own factory is not necessarily used as a raw material. In practicing the present invention, the melting furnace is not limited to an electric furnace, but may be a flat furnace, a converter, a crucible furnace, or the like. However, an electric furnace is desirable from the viewpoint that impurities and inclusions are less mixed, and that the control of the furnace is easily semi-automated. 11a
Is a tap hole of the melting furnace 11, which has a structure that can be rotated along the annular groove-shaped concave portion, and has a computer-controlled shutter 11b.
【００２５】図示１０ａ位置の鋳型は上記の溶解炉１１
から注湯されて、溶湯１２がその環状溝形凹部に盛り上
げられ、無端環状コンベア９の運転に伴って図示矢印ａ
のごとく１０ｂ位置に進行する。The mold at the position 10a in the drawing is the melting furnace 11 described above.
And the molten metal 12 is raised in the annular groove-shaped concave portion, and the arrow a shown in FIG.
It proceeds to the position 10b as in
【００２６】上記の矢印ａで表わされている区間を進行
する間、前記の溶湯を保温してその冷却速度を遅らせる
よう、還元性高温雰囲気を形成する雰囲気バーナー１３
が設けられている。An atmosphere burner 13 for forming a reducing high-temperature atmosphere so as to keep the temperature of the molten metal and slow down the cooling rate while proceeding in the section indicated by the arrow a.
Is provided.
【００２７】本図は模式的に描かれているため省略され
ているが本例の装置は、前記の鋳型が矢印ａ区間を通過
する間これを覆う形のトンネル状の耐火壁を設けて保温
を容易ならしめてある。Although this drawing is schematically illustrated and omitted, the apparatus of this embodiment is provided with a tunnel-shaped fire-resistant wall that covers the mold while the mold passes through the section indicated by arrow a to keep heat. Is easy.
【００２８】上記の保温機構は、１０ｂ位置に到達した
鋳型内の溶湯が凝固を完了していないように（少なくと
も、環状溝形凹部の上方に盛り上がっている溶湯が流動
性を失っていないように）設定される。The above-mentioned heat retaining mechanism is designed so that the molten metal in the mold that has reached the position 10b has not yet been solidified (at least, the molten metal rising above the annular groove-shaped concave portion has not lost its fluidity. ) Is set.
【００２９】そして、１０ｂ位置に達した鋳型の上面に
沿って相対的に移動して余分の溶湯（盛り上がっている
部分）を掻き落とすワイパー１４を設ける。Then, a wiper 14 is provided which relatively moves along the upper surface of the mold which has reached the position 10b to scrape off excess molten metal (a raised portion).
【００３０】本発明装置を用いて本発明の連続鋳造方法
を実施する１例について次に説明する。シャッタ１１ｂ
を開いて出湯口１１ａから低炭素鋼の溶湯を出湯し、セ
ラミック製の鋳型１０ａの上に注湯する。上記の鋳型１
０ａは、環状の溝形凹部を上方に向けて開放しているの
で、注湯は迅速かつ容易に行われ、該凹部の隅々まで直
ちに溶湯が流動する。このため、湯境や湯不足などの鋳
造欠陥を生じるおそれが無い。また、セラミック鋳型を
用いているのですくわれ等の鋳型欠損に伴う鋳造欠陥が
発生するおそれも無く、環状製品の鋳込みが行われる。An example of implementing the continuous casting method of the present invention using the apparatus of the present invention will be described below. Shutter 11b
Is opened and a low-carbon steel melt is poured from the tap hole 11a and poured onto the ceramic mold 10a. The above mold 1
In Oa, since the annular groove-shaped concave portion is opened upward, pouring is performed quickly and easily, and the molten metal flows immediately to every corner of the concave portion. For this reason, there is no possibility that a casting defect such as a hot water boundary or a shortage of hot water may occur. In addition, since the ceramic mold is used, there is no possibility that a casting defect due to a mold defect such as a crack is generated, and the annular product is cast.
【００３１】図示の鋳型１０ａには、溶湯１２を盛り上
げ気味に注湯しておく。そして、この１０ａ位置の鋳型
が１０ｂ位置まで進行する矢印ａの区間で急速に冷却し
ないように、還元性雰囲気の火炎を発生する保温用の雰
囲気バーナー１３で補熱する。In the illustrated mold 10a, the molten metal 12 is raised and poured slightly. Then, in order to prevent the mold at the position 10a from being rapidly cooled in the section indicated by the arrow a which advances to the position 10b, the heat is supplemented by the atmosphere burner 13 for generating a flame of the reducing atmosphere.
【００３２】このようにして冷却期間を延長された溶湯
１２は、矢印ａ区間の進行中にガスを放散し、非金属介
在物を浮上せしめて自浄作用が行われる。The molten metal 12 whose cooling period has been extended in this way emits gas during the progress of the section indicated by the arrow a and causes nonmetallic inclusions to float, thereby performing a self-cleaning action.
【００３３】鋳型１０ｂの位置に来たとき、注湯の凝固
が完了していない状態で、その上面をワイパー１４で掻
き取る。これにより、盛り上がっていた余分の溶湯が除
去される。溶湯中のガスや不純物は前述の徐冷期間（矢
印ａの区間を進行する間）に上昇しているので、このよ
うにして溶湯の盛り上がり部分を除去すると、環状溝形
凹部内に残った鋳造製品の組成は健全なものとなる。When it reaches the position of the mold 10b, the upper surface thereof is scraped off by the wiper 14 in a state where the solidification of the molten metal has not been completed. As a result, the excess molten metal that has been raised is removed. Since the gas and impurities in the molten metal have risen during the above-described slow cooling period (while proceeding in the section indicated by the arrow a), if the swelling portion of the molten metal is removed in this manner, the casting remaining in the annular groove-shaped concave portion is removed. The composition of the product will be sound.
【００３４】また、上述のようにして余分の溶湯が掻き
取り除去されると、環状溝形凹部内の鋳造製品は所定の
形状，寸法となる。実際技術としては、この段階（掻取
り工程）において製品素材が「その後の熱収縮や若干の
圧延整形を考慮に入れた、目的の形状，寸法」となるよ
うコントロールされる。When the excess molten metal is scraped off as described above, the cast product in the annular groove-shaped concave portion has a predetermined shape and dimensions. As a practical technique, at this stage (scraping step), the product material is controlled so as to have a "target shape and dimensions taking into account the subsequent heat shrinkage and slight rolling and shaping".
【００３５】掻き取った溶湯は溶解炉１１に戻して投入
し、鉄鋼資源のリサイクルを図る。本実施例において
は、装置全体としての材料歩留りが９０％以上となっ
た。The scraped molten metal is returned to the melting furnace 11 and thrown in to recycle steel resources. In this example, the material yield of the entire apparatus was 90% or more.
【００３６】図示１０ｂの位置でワイパー１４による掻
取りを受けた鋳型は矢印ｂの如く進行して上下を反転さ
れ、鋳込まれていた製品素材１５は、凝固に伴う収縮と
自重とによって放出され、落下する。上記のようにして
落下した製品素材１５を受け取る位置に、搬送コンベア
１６が設けられており、受け取った製品素材１５を矢印
ｃのごとくＸＹ圧延ロール１７まで搬送して供給する。
製品素材１５′はＸ圧延ロール１７ａで図の左方に送ら
れながら圧延され、次いでＹ圧延ロール１７で紙面と直
角方向に送られながら圧延される。本例における圧延温
度は７００℃である。この圧延温度は搬送コンベア１６
の速度によって制御される。The mold scraped by the wiper 14 at the position shown in FIG. 10b advances as shown by the arrow b and is turned upside down, and the cast product material 15 is released by shrinkage due to solidification and its own weight. To fall. A transport conveyor 16 is provided at a position for receiving the product material 15 dropped as described above, and transports the received product material 15 to an XY rolling roll 17 as indicated by an arrow c to be supplied.
The product material 15 ′ is rolled while being sent to the left in the drawing by the X rolling roll 17 a, and then rolled while being sent by the Y rolling roll 17 in a direction perpendicular to the paper surface. The rolling temperature in this example is 700 ° C. This rolling temperature is determined by the conveyor 16
Is controlled by speed.
【００３７】このようにしてクロス圧延を受けた製品素
材１５′は、圧延によって製品寸法を精密に調節される
とともに、鋳造組織が微細化され、異方性のファイバー
組織が与えられる。このように、鋳造時の高温を常温ま
で冷却させることなく、鍛造適温まで冷却したときに圧
延するので熱経済の面でも有利であり、常温圧延に比し
て圧延設備が簡単で足りる。The product material 15 'subjected to the cross-rolling in this way has its product dimensions precisely adjusted by rolling, and its casting structure is refined to give an anisotropic fiber structure. As described above, since rolling is performed when cooled to an appropriate forging temperature without cooling the high temperature at the time of casting to normal temperature, it is advantageous in terms of thermal economy, and rolling equipment is simpler and simpler than normal temperature rolling.
【００３８】本実施例における製品は引張強さ４１〜５
２kg／mm2で、ＪＩＳ規格Ｇ３１０１ＳＳ４１００と同
等品質のものが得られた。The product in this embodiment has a tensile strength of 41 to 5
At 2 kg / mm 2 , the same quality as JIS standard G3101SS4100 was obtained.
【００３９】１０ｃ位置で製品素材１５を放出して搬送
コンベア１６に渡した鋳型は矢印ｅのごとく１０ｄ位置
まで進行する。この位置の下方に、圧縮空気を噴射する
清掃ノズル１８が設けられていて、鋳型１０ｄは圧縮空
気を吹き付けられて自動的に清掃される。The mold released from the product material 15 at the position 10c and transferred to the conveyor 16 advances to the position 10d as indicated by an arrow e. A cleaning nozzle 18 for injecting compressed air is provided below this position, and the mold 10d is blown with compressed air to be automatically cleaned.
【００４０】清掃された鋳型はさらに矢印ｆのごとく進
行し、ＴＶカメラ１９によって内部の目視検査を受け
る。損耗が認められた鋳型は型交換ステージで交換さ
れ、異常の無かった鋳型は進行を続けて再度の使用に供
される。The cleaned mold further proceeds as indicated by the arrow f, and undergoes a visual inspection of the inside by the TV camera 19. The mold found to be worn is replaced in the mold exchange stage, and the mold without any abnormality continues to be used again.
【００４１】再使用に供される鋳型は離型剤ノズル２１
によって離型剤を吹付け塗布され、図示１０ｅ位置に進
行する。上記の位置の鋳型１０ｅの上方に、予熱バーナ
ー２２が設置されている。本例の予熱バーナー２２は高
周波加熱バーナーによって構成されており、鋳型１０ｅ
を５００℃に加熱する。これにより、注湯時の熱衝撃が
緩和され、セラミック鋳型の破損が防止される。The mold to be reused is a release agent nozzle 21
The release agent is sprayed and applied to advance to the position 10e in the figure. The preheating burner 22 is installed above the mold 10e at the above position. The preheating burner 22 of this example is constituted by a high-frequency heating burner, and includes a mold 10e.
Is heated to 500 ° C. Thereby, the thermal shock at the time of pouring is reduced, and the ceramic mold is prevented from being damaged.
【００４２】[0042]
【発明の効果】上述の実施例によって理解されるように
本発明に係る環状鋼製品の鋳造方法は、上方開放形の鋳
型を無端環状コンベアに取付けて搬送しつつ、上記の鋳
型に設けられている環状溝形の凹部内へ、溶融された低
炭素鋼を注湯し、前記無端環状コンベアの運転に伴って
移動している鋳型中の溶湯をバーナーで補熱して徐冷す
ることにより凝固時期を遅延させ、該溶湯が凝固するま
での間に含有ガス，含有不純物，及び非金属介在物の少
なくとも何れかを浮上せしめ、前記鋳型の環状溝形の凹
部内で凝固した製品素材を、該鋳型を破壊することなく
取り出すので、 ａ．鋳型に設けられた環状の凹部が上方に露出している
ので、この中へ容易に注湯することができる。注湯の開
始，進行，完了を容易に行い得るということは、この操
作の自動化，連続化に適することを意味している。As will be understood from the above-described embodiment, the method for casting an annular steel product according to the present invention is provided on the above-mentioned mold while attaching the upper open mold to the endless annular conveyor and transporting the mold. The molten low-carbon steel is poured into the annular groove-shaped concave portion, and the molten metal in the mold moving with the operation of the endless annular conveyor is supplemented by a burner and gradually cooled to solidify the molten metal. And the contained gas, the contained impurities, and / or the nonmetallic inclusions are caused to float before the molten metal solidifies, and the product material solidified in the annular groove-shaped recess of the mold is removed from the mold. Is taken out without destroying it. A. Since the annular concave portion provided in the mold is exposed upward, the molten metal can be easily poured into the concave portion. The fact that pouring can be started, proceeded, and completed easily means that this operation is suitable for automation and continuous operation.
【００４３】ｂ．前記環状凹部に注湯された溶湯は、ほ
ぼ目的どおりの形状，寸法となり、上面が大気に開放さ
れている上に、高さ寸法が比較的小さいので、溶湯中の
不純物の上昇が容易である。B. The molten metal poured into the annular recess has a shape and dimensions almost as intended, and the upper surface is open to the atmosphere and the height is relatively small, so that impurities in the molten metal can easily rise. .
【００４４】ｃ．さらに、鋳込まれた溶湯が保温され
て、凝固するまでの時間が遅延されるので、溶湯中のガ
ス，不純物、非金属介在物の上昇が充分に行われ、環状
溝形の凹部内の溶湯は健全な組成のものになって凝固す
る。C. Further, since the time until the cast molten metal is kept warm and solidified is delayed, gas, impurities and nonmetallic inclusions in the molten metal are sufficiently raised, and the molten metal in the annular groove-shaped concave portion is sufficiently raised. Has a sound composition and solidifies.
【００４５】ｄ．掻き取られた溶湯は、再び溶解炉にリ
サイクルすることができるので、装置全体としての材料
歩留りが非常に高い。D. Since the scraped-off molten metal can be recycled to the melting furnace again, the material yield of the entire apparatus is very high.
【００４６】ｅ．環状溝内で凝固した環状の製品は、鋳
型を破壊しなくても取り出すことが出来るので、迅速，
容易，かつ連続的に製品取出作業が行われ、しかも鋳型
を繰り返し使用し得る。E. The annular product solidified in the annular groove can be taken out without breaking the mold.
The product can be easily and continuously taken out, and the mold can be used repeatedly.
【００４７】ｆ．上記の、繰返し使用可能な鋳型が、無
端環状コンベアに取付けて搬送されるので、これを循環
せしめて連続的に操業することができる。F. Since the above-mentioned mold that can be used repeatedly is mounted on the endless annular conveyor and conveyed, it can be circulated and operated continuously.
【００４８】また、前記の本発明装置によれば、無端環
状のコンベアと、上記コンベアに取付けられた複数の上
方開方形の鋳型と、上記鋳型に設けられた環状溝形の凹
部と、上記鋳型の環状溝形の凹部に溶解した低炭素鋼を
注湯する溶解炉と、低炭素鋼を注湯され前記コンベアに
よって搬送されている鋳型内の溶湯を保温して徐冷する
手段とを具備しているので、前記の発明方法を容易に実
施することができるという優れた実用的効果が得られ
る。Further, according to the apparatus of the present invention, an endless annular conveyor, a plurality of upper open square molds attached to the conveyor, an annular groove-shaped recess provided in the mold, and the mold A melting furnace for pouring low-carbon steel melted into the annular groove-shaped concave portion, and a means for keeping the molten metal in the mold, which is poured with low-carbon steel and conveyed by the conveyor, to gradually cool the molten metal. Therefore, an excellent practical effect that the above-described invention method can be easily carried out can be obtained.
【図１】本発明に係る連続鋳造装置の１実施例を示す模
式的な断面図FIG. 1 is a schematic sectional view showing one embodiment of a continuous casting apparatus according to the present invention.
【図２】本発明の適用対象である環状鋼製品を例示した
２面図FIG. 2 is a two-sided view illustrating an annular steel product to which the present invention is applied;
【図３】従来例の鋳造装置を示す模式的な断面図FIG. 3 is a schematic sectional view showing a conventional casting apparatus.
１ 型枠 ２ 上型 ３ 下型 ４ 中子 ５ キャビティ ６ 湯口 ７ 湯溜り ８ 押湯 ９ 無端環状のチエンコンベア １０ａ 注湯位置の鋳型 １０ｂ 掻取り位置の鋳型 １０ｃ 放出位置の鋳型 １０ｄ 清掃位置の鋳型 １０ｅ 予熱位置の鋳型 １１ 溶解炉 １１ａ 出湯口 １１ｂ シャッタ １２ 溶湯 １３ 雰囲気バーナー １４ ワイパー １５ 落下位置の製品素材 １５′ 圧延位置の製品素材 １６ 搬送コンベア １７ ＸＹ圧延ロール １７ａ Ｘ圧延ロール １７ｂ Ｙ圧延ロール １８ 清掃ノズル １９ ＴＶカメラ ２０ 型交換ステージ ２１ 離型剤ノズル ２２ 予熱バーナー DESCRIPTION OF SYMBOLS 1 Form frame 2 Upper mold 3 Lower mold 4 Core 5 Cavity 6 Faucet 7 Pool 8 Filler 9 Endless annular chain conveyor 10a Mold at pouring position 10b Mold at scraping position 10c Mold at discharge position 10d Mold at cleaning position 10e Mold at preheating position 11 Melting furnace 11a Outlet 11b Shutter 12 Melt 13 Atmospheric burner 14 Wiper 15 Product material at falling position 15 'Product material at rolling position 16 Conveyor 17 XY rolling roll 17a X rolling roll 17b Y rolling roll 18 Cleaning Nozzle 19 TV camera 20 Mold exchange stage 21 Release agent nozzle 22 Preheating burner
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 27/04 B22D 5/04 B22D 25/02 C21D 1/52 C21D 9/00 101 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B22D 27/04 B22D 5/04 B22D 25/02 C21D 1/52 C21D 9/00 101
Claims (4)
付けて搬送しつつ、上記の鋳型に設けられている環状溝
形の凹部内へ、溶融された低炭素鋼を注湯し、前記無端
環状コンベアの運転に伴って移動している鋳型中の溶湯
をバーナーで補熱して徐冷することにより凝固時期を遅
延させ、該溶湯が凝固するまでの間に含有ガス，含有不
純物，及び非金属介在物の少なくとも何れかを浮上せし
め、前記鋳型の環状溝形の凹部内で凝固した製品素材
を、該鋳型を破壊することなく取り出して、環状の鋼製
品を得ることを特徴とする、環状鋼製品の連続鋳造方
法。1. A molten low-carbon steel is poured into an annular groove-shaped recess provided in the mold while the upper open mold is mounted on an endless annular conveyor and transported. The molten metal in the mold moving along with the operation of the annular conveyor is supplemented by a burner and gradually cooled by slowing the solidification time, and the contained gas, contained impurities, and nonmetal A ring-shaped steel, wherein at least one of the inclusions is raised, and a product material solidified in the annular groove-shaped recess of the mold is taken out without breaking the mold to obtain a ring-shaped steel product. Continuous casting method for products.
付けられた複数の上方開方形の鋳型と、上記鋳型に設け
られた環状溝形の凹部と、上記鋳型の環状溝形の凹部に
溶解した低炭素鋼を注湯する溶解炉と、低炭素鋼を注湯
され前記コンベアによって搬送されている鋳型内の溶湯
を保温して徐冷する手段とを具備していることを特徴と
する、環状鋼製品の連続鋳造装置。2. An endless annular conveyor, a plurality of upper open square molds attached to the conveyor, an annular groove-shaped recess provided in the mold, and an annular groove-shaped recess of the mold. A melting furnace for pouring the low-carbon steel, and means for slowly cooling the molten metal in the mold that has been poured with the low-carbon steel and conveyed by the conveyor, and gradually cooled. Continuous casting equipment for steel products.
ンベアによって搬送される鋳型および溶湯の通路を覆う
トンネル状の耐熱壁を有するものであることを特徴とす
る、請求項２に記載した環状鋼製品の連続鋳造装置。3. A method according to claim 2, wherein said means for keeping the temperature of the molten metal and gradually cooling it has a tunnel-shaped heat-resistant wall for covering a passage of the molten metal and a mold conveyed by a conveyor. A continuous casting device for the described annular steel product.
た空間は、バーナーによって還元性の高温雰囲気に保た
れる構造であることを特徴とする、請求項３に記載した
環状鋼製品の連続鋳造装置。4. The continuous ring steel product according to claim 3, wherein the space covered by the tunnel-like heat-resistant wall has a structure in which a high-temperature reducing atmosphere is maintained by a burner. Casting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6072391A JP2948671B2 (en) | 1991-03-26 | 1991-03-26 | Continuous casting method and continuous casting apparatus for annular steel products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6072391A JP2948671B2 (en) | 1991-03-26 | 1991-03-26 | Continuous casting method and continuous casting apparatus for annular steel products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04294859A JPH04294859A (en) | 1992-10-19 |
| JP2948671B2 true JP2948671B2 (en) | 1999-09-13 |
Family
ID=13150486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6072391A Expired - Lifetime JP2948671B2 (en) | 1991-03-26 | 1991-03-26 | Continuous casting method and continuous casting apparatus for annular steel products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2948671B2 (en) |
-
1991
- 1991-03-26 JP JP6072391A patent/JP2948671B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04294859A (en) | 1992-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101530897B (en) | Bimetal clad pipe blank with transition layer and production method and production device thereof | |
| JP2021527569A (en) | Production equipment and methods for manufacturing metal composite plates in a short process | |
| US20240198415A1 (en) | Controlled nozzle cooling (cnc) of permanent mold casting | |
| JP5852126B2 (en) | How to increase the self-feeding capacity of large section cast blanks | |
| US3610320A (en) | Unit for manufacturing hollow metal ingots | |
| JP2955044B2 (en) | Continuous casting method and continuous casting apparatus for annular steel products | |
| JP2948671B2 (en) | Continuous casting method and continuous casting apparatus for annular steel products | |
| JP2992364B2 (en) | Continuous casting method and continuous casting apparatus for annular steel products | |
| JP2955035B2 (en) | Continuous casting method and continuous casting apparatus for annular steel products | |
| JP2955034B2 (en) | Continuous casting method and continuous casting apparatus for annular steel products | |
| US3593777A (en) | Leader for ingot in continuous casting | |
| US2747245A (en) | Process for continuous casting of metal billets | |
| JPH07144255A (en) | Vertical semicontinuous casting device for large cross section cast slab and carrying out method of cast slab | |
| CN105522132A (en) | Triangular continuous casting slab preparation device and using method thereof | |
| CN210188431U (en) | Progressive solidification forming device for large cast ingot or cast blank | |
| JP2003071547A (en) | Composite mold for continuously casting of copper and copper alloy, continuous casting device for copper or copper alloy, and continuously casting method for copper or copper alloy | |
| JPH079089A (en) | Method for swingly casting low carbon steel and swing type mold structure for low carbon steel | |
| JPH07227653A (en) | Method and device for reducing shrinkage hole in continuous casting | |
| JP2001162352A (en) | Method of manufacturing small lot of steel slabs and apparatus thereof | |
| JPS63180351A (en) | Cast slab casting method | |
| JPH0847759A (en) | Method for continuously casting wide and thin cast slab | |
| JPH02263543A (en) | Method for continuously casting strip | |
| JPH02299756A (en) | Method and apparatus for vertical type continuous casting | |
| JPH11291006A (en) | Production of various kinds of cast slab and producing equipment thereof | |
| JPS5680352A (en) | Mold for casting starting block and casting method using this mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080702 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090702 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100702 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20110702 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110702 Year of fee payment: 12 |