JP2845706B2 - Molding equipment for continuous casting equipment - Google Patents

Molding equipment for continuous casting equipment

Info

Publication number
JP2845706B2
JP2845706B2 JP630993A JP630993A JP2845706B2 JP 2845706 B2 JP2845706 B2 JP 2845706B2 JP 630993 A JP630993 A JP 630993A JP 630993 A JP630993 A JP 630993A JP 2845706 B2 JP2845706 B2 JP 2845706B2
Authority
JP
Japan
Prior art keywords
slab
casting
mold
powder
penetration
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 - Fee Related
Application number
JP630993A
Other languages
Japanese (ja)
Other versions
JPH06210403A (en
Inventor
隆雄 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP630993A priority Critical patent/JP2845706B2/en
Publication of JPH06210403A publication Critical patent/JPH06210403A/en
Application granted granted Critical
Publication of JP2845706B2 publication Critical patent/JP2845706B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、モールドからビームブ
ランク(型鋼素材)やニアーネットシェイプ(より製品
に近い断面形状のI型鋼、H型鋼)など複雑な断面形状
の鋳片を連続的に鋳造する連続鋳造設備のモールド装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to continuously cast a slab having a complicated cross-sectional shape such as a beam blank (mold steel material) or a near net shape (I-shaped steel or H-shaped steel having a cross-sectional shape closer to a product) from a mold. The present invention relates to a molding device for a continuous casting facility.

【0002】[0002]

【従来の技術】従来、モールドパウダーを用いた連続鋳
造において、パウダーの溶融特性や粘性と縦割れ発生に
ついては密接な関係にあることが判明しており、たとえ
ば高粘性パウダーでは、他の低粘性パウダーを使用した
場合より縦割れ長さが短く、手入率も低い。一般にパウ
ダーの粘性が低すぎるとパウダーの溶け込み率は増大
し、局部的に過剰溶け込みを起こしてシェルの冷却が不
均一となりやすいことが知られている。
2. Description of the Related Art It has been known that, in continuous casting using a mold powder, the melting characteristics and viscosity of the powder are closely related to the occurrence of vertical cracks. The vertical crack length is shorter and the maintenance rate is lower than when powder is used. In general, it is known that if the viscosity of the powder is too low, the penetration rate of the powder increases, and excessive melting occurs locally, so that the cooling of the shell tends to be uneven.

【0003】ところで、近年、連続鋳造では鋳造品の圧
延工程を少なくするために製品に近い断面形状で鋳片を
引き抜く鋳造が行われている。たとえばH型鋼素材のビ
ームブランクの場合の連続鋳造では、ウェブ部の厚みに
対してフランジ部の厚みが大きいビームブランク等があ
り、この場合厚みの小さいウェブ部がフランジ部より速
く冷却されて凝固し、ウェブ部に縦割れが生じることが
ある。
[0003] In recent years, in continuous casting, casting in which a slab is drawn out in a cross-sectional shape close to the product has been performed in order to reduce the rolling process of the cast product. For example, in continuous casting in the case of a beam blank of an H-shaped steel material, there is a beam blank or the like in which the thickness of the flange portion is larger than the thickness of the web portion. In this case, the web portion having a smaller thickness is cooled faster than the flange portion and solidifies. In some cases, vertical cracks occur in the web portion.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記H型鋼素
材のビームブランクの連続鋳造では、その問題点を解決
するために、ウェブ成形部の冷却速度をフランジ成形部
の冷却速度より遅くしてウェブとフランジを極力均一に
凝固させることが提案されている。(たとえば特開平4
−21849号公報)そうすると、モールド内ではウェ
ブ成形部のモールド銅板温度がフランジ成形部のモール
ド銅板温度に対して高くなり、湯面に投下されたモール
ドパウダーは、ウェブ成形部では高温で粘度が低くなっ
てパウダーの溶け込み率が増大し、局部的に過剰溶け込
みを起こしてシェルの冷却が不均一となりやすい。一
方、フランジ成形部では粘度が低くなって溶け込み量が
低下し、残ったパウダーが高温のウェブ成形部側に流入
してウェブ成形部での溶け込み率をさらに増大させる結
果となる。
However, in the continuous casting of the beam blank made of the H-shaped steel material, in order to solve the problem, the cooling speed of the web forming portion is made slower than the cooling speed of the flange forming portion. And solidifying the flange as uniformly as possible. (For example,
Then, the temperature of the mold copper plate in the web forming portion becomes higher than the temperature of the mold copper plate in the flange forming portion in the mold, and the mold powder dropped on the molten metal surface has a high temperature and a low viscosity in the web forming portion. As a result, the penetration ratio of the powder increases, and excessive penetration occurs locally, whereby the cooling of the shell tends to be uneven. On the other hand, in the flange forming portion, the viscosity becomes low and the amount of penetration decreases, and the remaining powder flows into the high-temperature web forming portion side, resulting in further increasing the penetration rate in the web forming portion.

【0005】本発明は、上記問題点を解決して、厚みの
異なる複数の成形部における鋳造用パウダー溶け込み量
の偏在を防止し、鋳片性状の低下を防止できる連続鋳造
設備のモールド装置を提供することを目的とする。
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a molding apparatus for a continuous casting facility that can prevent uneven distribution of the casting powder penetration amount in a plurality of molding portions having different thicknesses and can prevent deterioration of cast slab properties. The purpose is to do.

【0006】[0006]

【課題を解決するための手段】上記問題点を解決するた
めに本発明は、厚みの異なる複数の部分で構成される断
面の鋳片を連続鋳造するモールドを備えた連続鋳造設備
のモールド装置において、各鋳片成形部の連結部近傍
に、下部が溶湯内に浸漬する鋳造用パウダーの流入防止
堰を垂下したものである。
SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a molding apparatus for a continuous casting facility provided with a mold for continuously casting a slab having a cross section composed of a plurality of portions having different thicknesses. In addition, in the vicinity of the connecting portion of each slab forming portion, a weir for preventing inflow of casting powder whose lower portion is immersed in the molten metal is suspended.

【0007】[0007]

【作用】上記構成によれば、冷却速度が遅くしたため結
果としてモールド銅板温度が高い鋳片成形部に投入され
た鋳造用パウダーは、粘度が低くなって溶け込み率が増
加し、冷却速度が速くモールド銅板温度の低い鋳片成形
部に投入されて粘度が高く溶け込み量の少ない鋳造用パ
ウダーが、その鋳片成形部の湯面から高温の鋳片成形部
側に流入しようとしても、溶け込み防止用堰体により流
入が阻止されるので、鋳片成形部における不均一な溶け
込みを防止することができる。
According to the above construction, the cooling speed is reduced, and as a result, the casting powder introduced into the slab forming section where the temperature of the mold copper plate is high has a low viscosity, the penetration rate increases, and the cooling rate increases. Even if the powder for casting, which has a high viscosity and a small amount of penetration, is poured into the slab forming section with a low copper plate temperature and tries to flow from the molten metal surface of the slab forming section to the high-temperature slab forming section side, the penetration preventing weir is used. Since the inflow is prevented by the body, it is possible to prevent uneven penetration in the cast slab forming portion.

【0008】また各成形部間で鋳造用パウダーの流動が
極めて少なくなるので、各鋳片形成部ごとに異なる材質
の鋳造用パウダーを使用することができ、各成形部のモ
ールド銅板の表面温度に対応して鋳造用パウダーの粘度
調整し均一な溶け込みが可能となる鋳造用パウダーを使
用することも可能となる。
Further, since the flow of the casting powder between the molding parts is extremely small, it is possible to use casting powder of a different material for each slab forming part, and the surface temperature of the mold copper plate of each molding part is reduced. Correspondingly, it becomes possible to use a casting powder capable of adjusting the viscosity of the casting powder to enable uniform penetration.

【0009】[0009]

【実施例】以下、本発明に係る連続鋳造設備のモールド
装置の一実施例を図面に基づいて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a molding apparatus for a continuous casting facility according to the present invention will be described below with reference to the drawings.

【0010】この実施例は、フランジ部1,1とウェブ
部2からなる鋳片(ニアーネットシェイプ)3を連続鋳
造するモールド装置に関し、フランジ部1の厚みFTに
対してウェブ部2の厚みWTが小さい鋳片3を連続鋳造
するモールド4を備え、フランジ成形部11の冷却速度
に対してウェブ成形部12の冷却速度を遅くした連続鋳
造設備のモールド装置において、ウェブ成形部12のフ
ランジ成形部11との連結部近傍に、下部が溶湯M内に
浸漬された鋳造用パウダーの流入防止堰13を配置した
ものである。
This embodiment relates to a molding apparatus for continuously casting a slab (near net shape) 3 composed of flange portions 1 and 1 and a web portion 2, and relates to a thickness FT of the web portion 2 with respect to a thickness FT of the flange portion 1. In a molding apparatus of a continuous casting facility provided with a mold 4 for continuously casting a slab 3 having a small diameter, and a cooling rate of the web forming section 12 being made slower than a cooling rate of the flange forming section 11, the flange forming section of the web forming section 12 is provided. In the vicinity of a connection portion with the casting 11, an inflow prevention weir 13 of a casting powder whose lower portion is immersed in the molten metal M is arranged.

【0011】すなわちこの鋳片3は、たとえば高さHが
530mm(製品高さが500mm)、幅Wが230mm(製
品幅が200mm)、フランジ部1の厚みFTが80mm
(製品フランジ部1の厚みが14〜19mm)、ウェブ部
2の厚みWTが50mmm (製品ウェブ部2の厚みが9〜
11mm)のものである。
That is, the slab 3 has, for example, a height H of 530 mm (product height of 500 mm), a width W of 230 mm (product width of 200 mm), and a thickness FT of the flange portion 1 of 80 mm.
(The thickness of the product flange 1 is 14 to 19 mm), the thickness WT of the web 2 is 50 mmm (the thickness of the product web 2 is 9 to 9 mm).
11 mm).

【0012】前記モールド4は、内部に冷却水通路が形
成された4個のモールド分割体4a,4bとで構成さ
れ、フランジ形成部11側のモールド4aの冷却能力が
ウェブ形成部12側のモールド4bより大きく設定され
て、フランジ形成部11の冷却速度がウェブ形成部12
より速くなるように構成されている。前記流入防止堰1
3はモールド4上に配置された堰サポート14により支
持されて下部が溶湯Mに浸漬されている。そして、モー
ルド壁面4cとの間には少しの隙間(数mm程度)Dが設
けられている。
The mold 4 is composed of four mold divisions 4a and 4b each having a cooling water passage formed therein, and the cooling capacity of the mold 4a on the flange forming portion 11 side is reduced by the mold on the web forming portion 12 side. 4b, the cooling rate of the flange forming section 11 is
It is configured to be faster. The inflow prevention weir 1
3 is supported by a weir support 14 arranged on the mold 4 and the lower part is immersed in the molten metal M. Further, a small gap (about several mm) D is provided between itself and the mold wall surface 4c.

【0013】また、このモールド4のフランジ形成部1
1とウェブ形成部12に供給される鋳造用パウダーは、
フランジ形成部11のモールド銅板温度とウェブ形成部
12のモールド銅板温度にそれぞれ対応して最適な粘度
で溶け込み量がほぼ一定量となる材質のものが選択され
る。また、同一材質の鋳造用パウダーも使用することも
できる。
Further, the flange forming portion 1 of the mold 4
1 and the casting powder supplied to the web forming unit 12 are:
A material having an optimum viscosity and an almost constant penetration amount is selected corresponding to the mold copper sheet temperature of the flange forming section 11 and the mold copper sheet temperature of the web forming section 12, respectively. Also, casting powder of the same material can be used.

【0014】上記構成において、フランジ形成部11と
ウェブ形成部12の一方または両方の適所に垂下された
ノズル(図示せず)から溶湯が供給されるとともに、フ
ランジ形成部11とウェブ形成部12の湯面上にそれぞ
れ鋳造用パウダーが散布供給されて鋳造が開始される。
この鋳造用パウダーは、流入防止堰13によりフランジ
形成部11とウェブ形成部12が仕切られるので、湯面
上を流動して混じり合うこともなく、適度な量の鋳造用
パウダーが溶け込んで、鋳片の表面性状が悪化すること
がない。また同じ鋳造用パウダーを使用した場合には、
溶け込み量がウェブ形成部12がフランジ形成部11よ
り多くなるが、流入防止堰13により、鋳造用パウダー
の残量が多いフランジ形成部11から残量が少ないウェ
ブ形成部12への鋳造用パウダーの流入が防止されるの
で、溶け込み量の差が拡大して鋳片性状を更に悪化させ
るのを未然に防止することができる。
In the above-described configuration, the molten metal is supplied from a nozzle (not shown) which is suspended at one or both of the flange forming portion 11 and the web forming portion 12, and the molten metal is supplied from the flange forming portion 11 and the web forming portion 12. Casting powder is sprinkled on the surface of the molten metal to start casting.
In this casting powder, the flange forming portion 11 and the web forming portion 12 are separated by the inflow prevention weir 13, so that they do not flow and mix on the surface of the molten metal, and an appropriate amount of the casting powder melts into the casting powder. The surface properties of the piece do not deteriorate. When using the same casting powder,
Although the penetration amount of the web forming part 12 is larger than that of the flange forming part 11, the inflow prevention weir 13 allows the casting powder to be transferred from the flange forming part 11 having a large remaining amount of the casting powder to the web forming part 12 having a small remaining amount. Since the inflow is prevented, it is possible to prevent the difference in the penetration amount from expanding and further deteriorating the slab properties.

【0015】上記構成によれば、流入防止堰13により
モールド4の鋳片形成部を擬似単純形状のフランジ形成
部11,11とウェブ形成部12とに仕切ることで、均
一な溶け込みを行うとともに、フランジ形成部11,1
1とウェブ形成部12間の鋳造用パウダーの移動を防止
してそれぞれ専用の鋳造用パウダーを使用を可能とし、
全体として均一な溶け込みをはかることができる。
According to the above configuration, the inflow prevention weir 13 partitions the slab forming portion of the mold 4 into the pseudo-simple-shaped flange forming portions 11 and 11 and the web forming portion 12 so as to perform uniform penetration. Flange forming part 11, 1
1 to prevent the movement of the casting powder between the web forming unit 12 and enable the use of a dedicated casting powder,
Uniform penetration can be achieved as a whole.

【0016】[0016]

【発明の効果】以上に述べたごとく本発明によれば、冷
却速度が遅くて温度が高い鋳片成形部に投入された鋳造
用パウダーは、溶け込み率が増加し、冷却速度が速く温
度の低い鋳片成形部に投入されて溶け込み量の少ない鋳
造用パウダーが、その鋳片成形部の湯面から高温の鋳片
成形部側に流入しようとしても、溶け込み防止用堰体に
より流入が阻止されるので、鋳片成形部における不均一
な溶け込みを防止することができる。
As described above, according to the present invention, the casting powder introduced into the slab molding part having a low cooling rate and a high temperature has an increased penetration rate, a high cooling rate and a low temperature. Even if the casting powder that has been injected into the slab forming section and has a small amount of penetration attempts to flow from the molten metal surface of the slab forming section to the high-temperature slab forming section side, the inflow is prevented by the penetration preventing weir body. Therefore, it is possible to prevent uneven penetration in the cast slab.

【0017】また各成形部間で鋳造用パウダーの流動が
極めて少なくなるので、各鋳片形成部ごとに異なる材質
の鋳造用パウダーを使用することができ、各成形部のモ
ールド銅板の表面温度に対応して均一な溶け込みが可能
となる鋳造用パウダーを選択することで、厚みが小さく
高温側の鋳片成形部における鋳造用パウダーの溶け込み
量の増大を防止することができ、厚みの大きい低温側の
鋳片成形部で鋳造される鋳片の性状も低下させることも
なく、縦割れなどの発生を防止することができる。
Also, since the flow of the casting powder between the forming parts is extremely small, it is possible to use a different type of casting powder for each slab forming part. Corresponding and uniform penetration is possible by selecting the casting powder, which can prevent the penetration of the casting powder from increasing in the cast slab where the thickness is small and on the high temperature side. Thus, it is possible to prevent the occurrence of vertical cracks and the like without deteriorating the properties of the slab cast in the slab molding portion of (1).

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る連続鋳造設備のモールド装置の一
実施例を示す平面図である。
FIG. 1 is a plan view showing one embodiment of a molding apparatus of a continuous casting facility according to the present invention.

【図2】同モールド装置により鋳造される鋳片の横断面
図である。
FIG. 2 is a cross-sectional view of a slab cast by the molding apparatus.

【図3】図1に示すA−A断面図である。FIG. 3 is a sectional view taken along line AA shown in FIG. 1;

【符号の説明】[Explanation of symbols]

1 フランジ部 2 ウェブ部 3 鋳片 4 モールド 11 フランジ成形部 12 ウェブ成形部 13 流入防止堰 14 堰サポート D 隙間 DESCRIPTION OF SYMBOLS 1 Flange part 2 Web part 3 Cast piece 4 Mold 11 Flange forming part 12 Web forming part 13 Inflow prevention weir 14 Weir support D Clearance

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平4−262837(JP,A) 特開 平4−158959(JP,A) 特開 平2−155545(JP,A) 特開 昭63−20141(JP,A) 特開 昭62−137154(JP,A) 特開 昭62−3852(JP,A) 特開 平4−210849(JP,A) (58)調査した分野(Int.Cl.6,DB名) B22D 11/00 B22D 11/04 311 B22D 11/10──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-262837 (JP, A) JP-A-4-158959 (JP, A) JP-A-2-155545 (JP, A) JP-A-63-1988 20141 (JP, A) JP-A-62-137154 (JP, A) JP-A-62-3852 (JP, A) JP-A-4-210849 (JP, A) (58) Fields investigated (Int. 6 , DB name) B22D 11/00 B22D 11/04 311 B22D 11/10

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 厚みの異なる複数の部分で構成される断
面の鋳片を連続鋳造するモールドを備えた連続鋳造設備
のモールド装置において、各鋳片成形部の連結部近傍
に、下部が溶湯内に浸漬する鋳造用パウダーの流入防止
堰を垂下したことを特徴とする連続鋳造設備のモールド
装置。
In a molding apparatus of a continuous casting facility provided with a mold for continuously casting a slab having a cross section constituted by a plurality of portions having different thicknesses, a lower portion is located near a connecting portion of each slab forming portion and a lower portion is formed in a molten metal. A molding apparatus for a continuous casting facility, wherein a weir for preventing inflow of casting powder immersed in a pipe is suspended.
JP630993A 1993-01-19 1993-01-19 Molding equipment for continuous casting equipment Expired - Fee Related JP2845706B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP630993A JP2845706B2 (en) 1993-01-19 1993-01-19 Molding equipment for continuous casting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP630993A JP2845706B2 (en) 1993-01-19 1993-01-19 Molding equipment for continuous casting equipment

Publications (2)

Publication Number Publication Date
JPH06210403A JPH06210403A (en) 1994-08-02
JP2845706B2 true JP2845706B2 (en) 1999-01-13

Family

ID=11634777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP630993A Expired - Fee Related JP2845706B2 (en) 1993-01-19 1993-01-19 Molding equipment for continuous casting equipment

Country Status (1)

Country Link
JP (1) JP2845706B2 (en)

Also Published As

Publication number Publication date
JPH06210403A (en) 1994-08-02

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