JPS6339339B2 - - Google Patents
Info
- Publication number
- JPS6339339B2 JPS6339339B2 JP58030363A JP3036383A JPS6339339B2 JP S6339339 B2 JPS6339339 B2 JP S6339339B2 JP 58030363 A JP58030363 A JP 58030363A JP 3036383 A JP3036383 A JP 3036383A JP S6339339 B2 JPS6339339 B2 JP S6339339B2
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- casting
- thin plate
- solidified
- mold
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 238000005266 casting Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は、薄板鋼板を直接鋳造する方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for directly casting thin steel sheets.
従来の薄板鋼板の製造方法は、鋼塊からの分塊
圧延または連続鋳造法により200〜250mm厚のスラ
ブを製造し、その後これを熱間圧延して薄板鋼板
を得る方法が一般的である。 Conventional methods for producing thin steel plates generally involve producing a slab with a thickness of 200 to 250 mm by blooming or continuous casting from a steel ingot, and then hot rolling the slab to obtain a thin steel plate.
然るにこれらの方法では、大規模な熱延設備や
スラブを加熱するエネルギーが必要であるため、
薄板を直接鋳造する技術の開発が重要な課題とな
つている。 However, these methods require large-scale hot rolling equipment and energy to heat the slab.
The development of technology for directly casting thin sheets has become an important issue.
従来より溶鋼の連続的に鋳造する場合、鋳型内
に溶鋼を注入し、断面内の周囲を凝固させた後に
これを下方に引抜く方法が一般的に行なわれてき
ている。しかしこの方法では
(1) ノズル径と鋳型内のりとの取合いの関係から
厚さ数十mm以下の鋳片を鋳造する事は困難であ
る。 Conventionally, when continuously casting molten steel, a method has generally been used in which the molten steel is poured into a mold, solidified around the cross section, and then pulled out downward. However, with this method, it is difficult to cast slabs with a thickness of several tens of mm or less due to (1) the relationship between the nozzle diameter and the glue in the mold;
(2) 鋳片と鋳型の間のマサツのため引抜き速度を
２ｍ／min程度以上に上げる事が困難である等
の問題がある。(2) There are problems such as it is difficult to increase the drawing speed above about 2 m/min due to the stiffness between the slab and the mold.
これらの問題を解消して薄板の効率的な鋳造法
及び装置を提供するものとして、発明者は既に、
次の片面鋳造による方法及び装置の特許出願を行
なつている。（特開昭58−90357号公報）
即ち、該出願に係る発明は、薄板の効率的な鋳
造法及び装置を提供するものである。即ち該発明
の要旨とするところは傾斜した無限軌道をなす平
板上に、溶鋼を注ぎ薄板を鋳造する方法におい
て、鋳造方向と注入流の流れの方向を逆にし、流
れの下端が溶鋼の表面張力で自己保持される様に
した事を特徴とする薄板の鋳造方法及び駆動輪に
より駆動され無限軌道をなすとともに、傾斜した
平面を有するベルト機構と、傾斜したベルト平面
上に溶融金属を流下供給する手段と、傾斜面上方
側に、鋳片を抽出する装置と、ベルトを駆動輪を
介して斜面上方向に駆動する装置とよりなる溶融
金属の連続鋳造装置である。 In order to solve these problems and provide an efficient thin plate casting method and device, the inventor has already
We have filed a patent application for the following single-sided casting method and device. (Japanese Unexamined Patent Publication No. 58-90357) That is, the invention according to this application provides an efficient method and apparatus for casting thin plates. That is, the gist of the invention is that in a method of pouring molten steel onto a flat plate forming an inclined endless track and casting a thin plate, the casting direction and the direction of the injection flow are reversed, and the lower end of the flow is caused by the surface tension of the molten steel. A method for casting a thin plate, characterized in that it is self-retained, a belt mechanism that is driven by a drive wheel, forms an endless track, and has an inclined plane, and a molten metal is supplied falling onto the inclined plane of the belt. This is a continuous casting apparatus for molten metal, which comprises a device for extracting slabs above the slope, and a device for driving a belt upwardly on the slope via a drive wheel.
この方法と装置においては、まず、無限軌道平
面上で溶鋼が凝固し、凝固シエルの引抜き速度と
鋳型の移動速度を同期させる事により、マサツに
よる溶鋼のブレークアウトを防止する事が出来る
ため引抜き速度を上げる事ができる。 In this method and device, the molten steel first solidifies on the endless track plane, and by synchronizing the drawing speed of the solidified shell and the moving speed of the mold, breakout of the molten steel due to mass can be prevented, so the drawing speed is increased. can be raised.
また片面凝固のため、鋳造中鋳片の下面は鋳型
面と接しているが、上面は溶鋼または空気と接し
ており、鋳型の上面が不要であるため、ノズル配
置に特に問題は生じない。該発明につき第１図に
より説明する。 Furthermore, because of single-sided solidification, the lower surface of the slab is in contact with the mold surface during casting, but the upper surface is in contact with molten steel or air, and the upper surface of the mold is not required, so there are no particular problems with nozzle arrangement. The invention will be explained with reference to FIG.
図中、１１は鋳造用ベルトまたは無限軌道、１
２は鋳型駆動輪、１３はタンデイツシユ、１４は
未凝固溶鋼、１５は凝固薄板、１６は巻き取り装
置を示す。溶鋼１４はタンデイツシユ１３から鋳
型面上に注入され、重力に従つて一定距離、鋳型
面を降下するが、鋳型面が上向きに移動している
ため、定常状態では溶鋼先端１７、及び溶鋼後端
１８は、溶鋼落下点１９からほぼ一定の相対位置
にくる。また凝固シエルは鋳型面上の溶鋼先端か
ら図中左に進むにつれて発達し、終には溶鋼面を
くぐり出て、完全凝固薄板となり、矢印Ａの方向
へ進行しその後巻き取り装置に巻きとられる。本
方式により約２〜20mmの薄板を製造する事ができ
る。 In the figure, 11 is a casting belt or endless track, 1
2 is a mold drive wheel, 13 is a tundish, 14 is unsolidified molten steel, 15 is a solidified thin plate, and 16 is a winding device. Molten steel 14 is injected onto the mold surface from the tundish 13 and falls down the mold surface a certain distance according to gravity, but since the mold surface is moving upward, in a steady state, the molten steel front end 17 and the molten steel rear end 18 comes to a substantially constant relative position from the molten steel falling point 19. In addition, the solidified shell develops as it progresses from the tip of the molten steel on the mold surface to the left in the figure, and eventually passes through the molten steel surface and becomes a completely solidified thin plate, which advances in the direction of arrow A and is then wound up by a winding device. . With this method, thin plates of approximately 2 to 20 mm can be manufactured.
本発明は、この様な片面鋳造における溶鋼の流
動状態と材質の特性を制御する方法に関するもの
である。すなわち、
第１図に示した方法において、溶鋼先端部１７
の、上面から見た形状を、凹凸の少なく、かつ時
間的に変動のない一定形状に保つ事が、凝固した
薄板の表面の凹凸を少なくするために必要であ
る。この関係をさらに詳しく説明すると、第２図
及び第３図は溶鋼流の上面図を示しているが、溶
鋼先端付近の形状は第２図の１７付近の如く滑ら
かな形状である事が必要で、第３図の１７′付近
の如く凹凸の急激な形状では薄板の表面品質が不
良となる。即ち、溶鋼先端付近の形状が凹凸の激
しいものであつたり、先端の位置が不安定の場合
には薄板の下面に、湯皺による模様が形成され、
表面品質が悪くなる。 The present invention relates to a method for controlling the flow state of molten steel and material properties in such single-sided casting. That is, in the method shown in FIG.
It is necessary to maintain the shape of the solidified thin plate as seen from the top in a constant shape with few irregularities and no fluctuation over time in order to reduce the irregularities on the surface of the solidified thin plate. To explain this relationship in more detail, Figures 2 and 3 show top views of the molten steel flow, and the shape near the tip of the molten steel needs to be a smooth shape like around 17 in Figure 2. , the surface quality of the thin plate is poor when the unevenness is sharp as in the vicinity of 17' in FIG. In other words, if the shape near the tip of the molten steel is extremely uneven or if the tip position is unstable, a pattern due to the molten steel wrinkles will be formed on the lower surface of the thin plate.
Poor surface quality.
このように溶鋼先端部を、凹凸や変動の少ない
一定形状に保つためには、溶鋼の粘性が大きいほ
うが、流れの先端の位置制御が容易で好都合であ
る。粘性を増すためには、溶鋼を撹拌しながら冷
却する事によつて得られる、凝固した固体粒を含
んだ半融溶鋼を用いる事が有効である。固体粒の
体積率を上げる程、粘性が増す事から、固体粒の
体積率を調節する事により望ましい粘性を得る事
ができる。 In order to maintain the tip of the molten steel in a constant shape with less irregularities and fluctuations, it is advantageous for the molten steel to have a higher viscosity because it is easier to control the position of the tip of the flow. In order to increase the viscosity, it is effective to use semi-molten steel containing solidified solid particles obtained by cooling the molten steel while stirring. Since the viscosity increases as the volume fraction of solid particles increases, a desired viscosity can be obtained by adjusting the volume fraction of solid particles.
また半融溶鋼の使用により、材質的効果もあ
る。即ち、凝固組織が微細化して、製品の強度が
向上する。 Also, the use of semi-molten steel has material effects. That is, the solidified structure becomes finer and the strength of the product is improved.
本発明はこのように溶鋼として、一部が凝固し
て生成した凝固粒を含む半融溶鋼を用いる表面性
状の優れた薄板の直接鋳造方法で、産業の発達に
寄与するものである。 The present invention contributes to the development of industry by providing a method for directly casting thin plates with excellent surface properties using semi-molten molten steel containing solidified particles partially solidified as molten steel.
第１図は、薄板の直接鋳造方法を説明する立面
図、第２〜３図は、第１図における溶鋼先端付近
の平面図である。
１１……鋳造用ベルトまたは無限軌道、１２…
…鋳型駆動輪、１３……タンデイツシユ、１４…
…未凝固溶鋼、１５……凝固薄板、１６……巻き
取り装置、１７……溶鋼先端、１８……溶鋼後
端、１９……溶鋼落下点。
FIG. 1 is an elevational view illustrating a method for directly casting a thin plate, and FIGS. 2 and 3 are plan views of the vicinity of the tip of the molten steel in FIG. 1. 11... Casting belt or endless track, 12...
...Mold drive wheel, 13...Tandate shuttle, 14...
...Unsolidified molten steel, 15... Solidified thin plate, 16... Winding device, 17... Molten steel tip, 18... Molten steel rear end, 19... Molten steel falling point.
Claims (1)
造方向と注入流方向を逆にし、注入流の下端を溶
鋼の表面張力で、その位置を自己保持する如くし
て鋳造する連続鋳造方法において、移動する金属
板上に注ぐ溶鋼として、溶鋼を撹拌しながら冷却
しその一部が凝固して生成した凝固粒を含む半融
溶鋼を用いたことを特徴とする薄板の直接鋳造方
法。1. In a continuous casting method in which molten steel is poured onto an inclined moving metal plate, the casting direction and the injection flow direction are reversed, and the lower end of the injection flow is cast so that its position is self-maintained by the surface tension of the molten steel. A method for direct casting of a thin plate, characterized in that semi-molten steel containing solidified particles produced by cooling the molten steel while stirring and partially solidifying the molten steel is used as the molten steel poured onto a moving metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3036383A JPS59156555A (en) | 1983-02-25 | 1983-02-25 | Direct casting method of thin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3036383A JPS59156555A (en) | 1983-02-25 | 1983-02-25 | Direct casting method of thin plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59156555A JPS59156555A (en) | 1984-09-05 |
| JPS6339339B2 true JPS6339339B2 (en) | 1988-08-04 |
Family
ID=12301777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3036383A Granted JPS59156555A (en) | 1983-02-25 | 1983-02-25 | Direct casting method of thin plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59156555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6396072A (en) * | 1986-10-06 | 1988-04-26 | 喜多産業株式会社 | Simple heating vessel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5890357A (en) * | 1981-11-25 | 1983-05-30 | Nippon Steel Corp | Method and device for continuous casting of thin sheet |
-
1983
- 1983-02-25 JP JP3036383A patent/JPS59156555A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5890357A (en) * | 1981-11-25 | 1983-05-30 | Nippon Steel Corp | Method and device for continuous casting of thin sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6396072A (en) * | 1986-10-06 | 1988-04-26 | 喜多産業株式会社 | Simple heating vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59156555A (en) | 1984-09-05 |
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