JPH0523806A - Production of little lot of materials - Google Patents
Production of little lot of materialsInfo
- Publication number
- JPH0523806A JPH0523806A JP17241591A JP17241591A JPH0523806A JP H0523806 A JPH0523806 A JP H0523806A JP 17241591 A JP17241591 A JP 17241591A JP 17241591 A JP17241591 A JP 17241591A JP H0523806 A JPH0523806 A JP H0523806A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- chamber
- components
- steel
- chambers
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連続鋳造法による小ロ
ット材の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a small lot material by a continuous casting method.
【０００２】[0002]
【従来の技術】連続鋳造法は、成分が均一で、品質が安
定していることからユーザの高度な要求品質に対応する
ために広く用いられている。また、工程の省略、省エネ
ルギ、省力、歩留向上、生産性向上などに大きく寄与す
るため、連鋳比率は増大している。しかし、連続鋳造法
は、同一鋼種を数チャージ連続して鋳造することで、前
記の効果が得られるもので、本来は多品種小ロットの鋳
造には合わないプロセスである。2. Description of the Related Art The continuous casting method is widely used to meet the high quality requirements of users because the components are uniform and the quality is stable. Further, the continuous casting ratio is increasing because it greatly contributes to the omission of steps, energy saving, labor saving, yield improvement, and productivity improvement. However, the continuous casting method obtains the above effect by continuously casting the same steel type for several charges, and is originally a process that is not suitable for casting a large variety of small lots.
【０００３】[0003]
【発明が解決しようとする課題】鋼材に対するユーザニ
ーズが高度化するとともに、鋼種も細分化されるように
なってきた。例えば、JIS G4051 機械構造用炭素鋼鋼材
S45Cでは、S の含有量はS ≦0.035 ％と決められている
が、ユーザの要求によりS ≦0.010 ％、 0.005〜0.015
％、 0.010〜0.020 ％、 0.010〜0.025 ％、0.015 〜0.
025 ％、 0.020〜0.035 ％など、靱性、被削性を考慮し
て細かく決められている。As user needs for steel materials have become more sophisticated, steel types have also been subdivided. For example, JIS G4051 carbon steel for machine structures
In S45C, the S content is determined to be S ≤ 0.035%, but S ≤ 0.010%, 0.005 to 0.015% depending on the user's request.
%, 0.010 to 0.020%, 0.010 to 0.025%, 0.015 to 0.
025%, 0.020 to 0.035%, etc. are finely determined in consideration of toughness and machinability.
【０００４】鋼中の Sに関しては、靱性が必要な場合は
低め狙いとし、被削性を高めたい場合は高め狙いとして
いる。S だけでなく、C 、Si、Mn、Crなども焼入れ性、
強度などのユーザの要求に応じてJIS G4051 機械構造用
炭素鋼鋼材S45Cの規格範囲内で細かく分けて製造してい
る。Regarding S in steel, it is aimed at a low level when toughness is required, and is set at a high level when it is desired to improve machinability. Not only S, but also C, Si, Mn, Cr etc. hardenability,
According to the user's requirements such as strength, JIS G4051 S45C carbon steel for machine structural use is manufactured by finely dividing it within the standard range.
【０００５】以上のよに、多品種小ロット化が進んでい
るが、この傾向は今後もさらに進むものと考えられこれ
に対応した製造技術の開発が必要である。As described above, although a variety of products and small lots are being developed, it is considered that this tendency will be further advanced in the future, and it is necessary to develop a manufacturing technique corresponding to this.
【０００６】本発明は上記の課題を達成するためになさ
れたもので、連続鋳造法で分割したタンディッシュ内で
連続的に成分を調整し、鋳造することによって小ロット
材を製造するとを目的とする。The present invention has been made to achieve the above object, and an object thereof is to manufacture a small lot material by continuously adjusting the components in a tundish divided by a continuous casting method and casting. To do.
【０００７】[0007]
【課題を解決するための手段】連続鋳造法で用いられる
タンディッシュ内を、溶鋼が移動できる複数の室に分割
し、それじれの室に合金成分を連続的に添加するととも
に、同時に各室内の溶鋼を攪拌し、各室から連続鋳造す
る小ロット材の製造方法である。[Means for Solving the Problems] The tundish used in the continuous casting method is divided into a plurality of chambers in which molten steel can move, and alloy components are continuously added to each of the chambers, and at the same time, in each chamber. This is a method for manufacturing a small lot material in which molten steel is stirred and continuously cast from each chamber.
【０００８】[0008]
【作用】本発明法で使用するタンディッシュの１例を図
１に示す。タンディッシュは、図１に示すようにＴ字形
で、Ｔ字の水平部に当たる部分に４室、垂直部に当たる
部分に１室、合計５室に分割されている。FIG. 1 shows an example of the tundish used in the method of the present invention. As shown in FIG. 1, the tundish is T-shaped, and is divided into five chambers, four chambers corresponding to the horizontal portion of the T-shape and one chamber corresponding to the vertical portion.
【０００９】図中１は取鍋で、取鍋１の下には取鍋１か
ら溶鋼を注入する注入室（Ｔ字の垂直部に当たる室）２
があり、注入室２に接して二つの成分調整室３があり、
さらにこの二つの成分調整室の両側に一つの成分調整室
４がある。注入室２と成分調整室３の境、成分調整室３
と成分調整室４の境には溶鋼の流入口５がある。流入口
５は、各室の底部に接して１個、その上部に２個設けて
ある。In the figure, 1 is a ladle, and below the ladle 1 is a pouring chamber 2 for pouring molten steel from the ladle 1 (a chamber corresponding to the vertical portion of the T-shape) 2.
There is two composition adjustment chambers 3 in contact with the injection chamber 2,
Further, one component adjusting chamber 4 is provided on each side of the two component adjusting chambers. The boundary between the injection chamber 2 and the component adjustment chamber 3, the component adjustment chamber 3
At the boundary between the composition adjusting chamber 4 and the composition adjusting chamber 4, there is an inlet 5 for molten steel. One inflow port 5 is provided in contact with the bottom of each chamber, and two inflow ports 5 are provided above it.
【００１０】また、成分調整室３、４には、底部に接し
た流入口５に近接して、底部に溶鋼攪拌のためのポーラ
スプラグ６が設けてある。各成分調整室の底部には、溶
鋼を鋳型８に注入するためのノズル７が設けてある。成
分調整室３、４の上部には合金元素添加のためのシュー
ト９がある。Further, in the component adjusting chambers 3 and 4, a porous plug 6 for stirring molten steel is provided in the bottom portion in the vicinity of the inflow port 5 in contact with the bottom portion. A nozzle 7 for injecting molten steel into a mold 8 is provided at the bottom of each component adjustment chamber. A chute 9 for adding alloy elements is provided above the component adjusting chambers 3 and 4.
【００１１】鋳造に際しては、基本成分に調整された溶
鋼を取鍋１から注入室２に注入し、注入室２に注入され
た溶鋼は流入口５から成分調整室３に流入する。流入し
た溶鋼はポーラスプラグ６から吹き込まれるArガスで攪
拌されると同時にシュート９から鋳造速度に応じて連続
的に合金鉄等が添加され成分調整される。合金鉄等は攪
拌されている溶鋼に添加されるため、均一に成分調整さ
れる。At the time of casting, molten steel adjusted to basic components is poured from the ladle 1 into the pouring chamber 2, and the molten steel poured into the pouring chamber 2 flows from the inflow port 5 into the component adjusting chamber 3. The inflowing molten steel is agitated by Ar gas blown from the porous plug 6, and at the same time, iron alloy or the like is continuously added from the chute 9 according to the casting speed to adjust the composition. Since ferroalloy and the like are added to the molten steel that is being stirred, the components are uniformly adjusted.
【００１２】成分調整室３で成分調整された溶鋼は、一
部はノズル７から鋳型８に注入され、残部は流入口５か
ら成分調整室４に流入する。流入した溶鋼は上記と同様
にポーラスプラグ６から吹き込まれるArガスで攪拌され
ると同時にシュート９から鋳造速度に応じて連続的に合
金鉄等が添加され成分調整され、その後ノズル７から鋳
型８に注入される。上記の例では、一つの基本成分から
４つの異なった鋼種を鋳造することができる。A part of the molten steel whose composition has been adjusted in the composition adjusting chamber 3 is injected into the mold 8 from the nozzle 7, and the rest flows into the composition adjusting chamber 4 through the inflow port 5. Similarly to the above, the inflowing molten steel is stirred by Ar gas blown from the porous plug 6, and at the same time iron alloy or the like is continuously added from the chute 9 according to the casting speed to adjust the composition, and then from the nozzle 7 to the mold 8. Injected. In the above example, four different steel grades can be cast from one basic composition.
【００１３】[0013]
【実施例】以下に実施例を挙げて本発明を説明する。表
１に示す取鍋内溶鋼成分を有する溶鋼を、図２に示す５
室からなるタンディッシュを用いて小ロット材に鋳造し
た。図２はタンディッシュの平面図で各室と成分調整室
の流入口５、合金添加位置15、ノズル７を示す。EXAMPLES The present invention will be described below with reference to examples. Molten steel having the molten steel composition in the ladle shown in Table 1 is shown in FIG.
It was cast into a small lot using a tundish consisting of a chamber. FIG. 2 is a plan view of the tundish showing the inlets 5 of the respective chambers and the component adjusting chamber, the alloy addition position 15, and the nozzle 7.
【００１４】90トン／チャージの溶鋼を取鍋内から20ト
ン容量のタンディッシュの注入室に注入した。成分調整
はＢ室で室当たり 5kgのSを添加して、溶鋼の S含有量
を高め、この溶鋼にＡ室で室当たり38kgのFCrLC(低炭素
フェロクロム) を添加して、溶鋼のCr含有量を高めた。90 tons / charge of molten steel was poured from inside the ladle into a tundish pouring chamber with a capacity of 20 tons. To adjust the composition, add 5 kg of S per room in room B to increase the S content of molten steel, and add 38 kg of FCrLC (low carbon ferrochrome) per room in room A to this molten steel to improve the Cr content of the molten steel. Raised.
【００１５】一方、Ｃ室では室当たり76kgのFCrLC を添
加して、溶鋼のCr含有量を高め、この溶鋼にＤ室で室当
たり 5kgのSを添加して、溶鋼の S含有量を高めた。こ
の鋳造に使用した攪拌のためのArガス流量は 100Nl／分
であった。なお、N 添加鋼やNが問題とならない鋼種で
は、Arガスに替えてN2ガスの使用が可能である。On the other hand, in the chamber C, 76 kg of FCrLC per chamber was added to increase the Cr content of the molten steel, and in this chamber, S of 5 kg per chamber was added to the molten steel to increase the S content of the molten steel. . The Ar gas flow rate for stirring used in this casting was 100 Nl / min. In addition, N 2 gas can be used instead of Ar gas for N-added steel and steel types where N does not pose a problem.
【００１６】このようにして鋳造した鋳片から試験片を
採取し分析を行った。その結果を表１にしす。分析の結
果 Sレベル３水準（S=0.008 ％、 0.018％、 0.028
％）、Crレベル２水準（Cr=0.03 ％、0.13％）の４種類
の成分の異なる鋼種が製造できた。Test pieces were sampled from the cast pieces thus cast and analyzed. The results are shown in Table 1. Results of analysis S level 3 level (S = 0.008%, 0.018%, 0.028%
%), Cr level 2 level (Cr = 0.03%, 0.13%), and four types of steels with different compositions could be manufactured.
【００１７】[0017]
【表１】 [Table 1]
【００１８】FCrLC の添加により溶鋼中のCr含有量を0.
10％高めることができたが、これにより溶鋼の温度降下
は 5℃であり、問題のないレベルであった。一方、S の
添加による溶鋼温度の変化はほとんど認められず安定し
た鋳造状態が得られた。なお、溶鋼温度の補償法とし
て、誘導加熱方式やプラズマ加熱方式等のタンディッシ
ュヒーターの適用も可能であり、合金鉄添加量を増加し
て広い成分範囲の小ロット材の製造も可能である。The addition of FCrLC reduces the Cr content in molten steel to 0.
Although it was possible to raise the temperature by 10%, the temperature drop of the molten steel was 5 ° C, which was a problem-free level. On the other hand, almost no change in molten steel temperature due to the addition of S was observed, and a stable cast state was obtained. As a method for compensating the molten steel temperature, a tundish heater such as an induction heating method or a plasma heating method can be applied, and the addition amount of ferroalloy can be increased to manufacture a small lot material having a wide composition range.
【００１９】[0019]
【発明の効果】本発明は、連続鋳造法で分割したタンデ
ィッシュ内で連続的に成分を調整し、鋳造することによ
って小ロット材を製造するもので、本発明によれば、多
鋼種の小ロット鋼材を容易に製造することができる。INDUSTRIAL APPLICABILITY According to the present invention, a small lot material is manufactured by continuously adjusting the components in a tundish divided by a continuous casting method and casting. Lot steel can be easily manufactured.
【図１】本発明法で使用するタンディッシュの説明図で
ある。FIG. 1 is an explanatory view of a tundish used in the method of the present invention.
【図２】実施例のタンディッシュの説明図である。FIG. 2 is an explanatory diagram of a tundish of an example.
１…取鍋、２…注入室、３…成分調整室、４…成分調整
室、５…流入口、６…ポーラスプラグ、７…ノズル、８
…鋳型、９シュート、11…Ａ室、12…Ｂ室、13…Ｃ室、
14…Ｄ室、15…合金添加位置。DESCRIPTION OF SYMBOLS 1 ... Ladle, 2 ... Injection chamber, 3 ... Component adjustment chamber, 4 ... Component adjustment chamber, 5 ... Inlet port, 6 ... Porous plug, 7 ... Nozzle, 8
… Mold, 9 shoots, 11… A room, 12… B room, 13… C room,
14 ... D chamber, 15 ... Alloy addition position.
Claims (1)
内を、溶鋼が移動できる複数の室に分割し、それぞれの
室に合金成分を連続的に添加するとともに、同時に各室
内の溶鋼を攪拌し、各室から連続鋳造することを特徴と
する小ロット材の製造方法。Claim: What is claimed is: 1. A tundish used in a continuous casting method is divided into a plurality of chambers in which molten steel can move, and alloy components are continuously added to the respective chambers. A method for manufacturing a small lot material, characterized in that the molten steel of 1. is stirred and continuously cast from each chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17241591A JPH0523806A (en) | 1991-07-12 | 1991-07-12 | Production of little lot of materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17241591A JPH0523806A (en) | 1991-07-12 | 1991-07-12 | Production of little lot of materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0523806A true JPH0523806A (en) | 1993-02-02 |
Family
ID=15941539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17241591A Withdrawn JPH0523806A (en) | 1991-07-12 | 1991-07-12 | Production of little lot of materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694417B2 (en) | 2012-02-10 | 2017-07-04 | Sarita Hernesniemi | Pivotable tundish and a method for continuous casting a metal alloy, use of a pivotable tundish and an elongated cast bar of a metal alloy |
-
1991
- 1991-07-12 JP JP17241591A patent/JPH0523806A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694417B2 (en) | 2012-02-10 | 2017-07-04 | Sarita Hernesniemi | Pivotable tundish and a method for continuous casting a metal alloy, use of a pivotable tundish and an elongated cast bar of a metal alloy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |