JPS6027558Y2 - Continuous casting mold - Google Patents
Continuous casting moldInfo
- Publication number
- JPS6027558Y2 JPS6027558Y2 JP967278U JP967278U JPS6027558Y2 JP S6027558 Y2 JPS6027558 Y2 JP S6027558Y2 JP 967278 U JP967278 U JP 967278U JP 967278 U JP967278 U JP 967278U JP S6027558 Y2 JPS6027558 Y2 JP S6027558Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- corner
- slab
- wall thickness
- 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
Links
Landscapes
- Continuous Casting (AREA)
Description
【考案の詳細な説明】
この考案は、連続鋳造装置における鋳型に関するもので
ある。[Detailed Description of the Invention] This invention relates to a mold for a continuous casting device.
一般に、例えば連続鋳造装置における鋳型としては、上
方位置のタンディシュから供給される溶融金属を通過さ
せつつ、前記溶融金属を４側方から冷却して凝固殻を形
式するものがあり、この鋳型の製造形態によってブロッ
ク形式、チューブラ形式、および組立形式などに分類さ
れている。In general, for example, a mold used in a continuous casting apparatus is one in which molten metal supplied from an upper tundish is passed through and the molten metal is cooled from four sides to form a solidified shell. They are classified into block format, tubular format, and assembly format depending on their shape.
いずれの形式の鋳型も、鋳型外側面を高速水流によって
冷却することにより、つぎの水スプレー冷却域において
鋳片にブレイクアウト（鋳片未凝固部の外部流出）が発
生しない最適の厚みの凝固殻を形式するように冷却能が
定められている。In both types of molds, by cooling the outer surface of the mold with a high-speed water stream, a solidified shell with an optimal thickness is created to prevent breakout (flow of unsolidified parts of the slab to the outside) of the slab in the next water spray cooling area. The cooling capacity is determined in the form of .
すなわち、例えばチューブラ形式の鋳型について見ると
、第１図に横断面図で示されているように、鋳型１は純
銅製で、正方形断面、均等肉厚ち、および長さ０．６〜
１．２７７１を有し、その外側には高速水流を通す均一
な間隙もの冷却水路２を備えている。That is, for example, when looking at a tubular mold, as shown in the cross-sectional view in FIG.
1.2771, and the outside thereof is equipped with cooling channels 2 with uniform gaps through which high-speed water flows.
鋳型１に溶融金属が供給されると、溶融金属は４側方か
ら冷却されて凝固殻３を形式し、その内部が未凝固部４
の固液２層の鋳片５となる。When molten metal is supplied to the mold 1, the molten metal is cooled from 4 sides to form a solidified shell 3, the inside of which forms an unsolidified part 4.
The slab 5 has two solid-liquid layers.
上記鋳片５は、冷却水路２の間隙ｔ２および鋳型１の肉
厚ちがともに均一であるために、形式凝固殻３の厚みも
が４側部においてほぼ均一となった状態で、直下のスプ
レー冷却域（図示せず）に向けて引抜かれていくが、鋳
片かど部５Ａに割れが生じ易く、ブレイクアウトの原因
となる場合が多い。Since the gap t2 of the cooling channel 2 and the wall thickness of the mold 1 are both uniform, the slab 5 has a uniform solidified shell 3 with a substantially uniform thickness on the 4 sides, and is sprayed directly below. Although the slab is drawn out toward a cooling area (not shown), cracks tend to occur in the corner portion 5A of the slab, which often causes breakouts.
そこで、第２図に横断面図で示されるように、鋳片かど
部５Ａが接する鋳型隅部ｌＡ’における肉厚ｔＲを最小
とし、鋳型面部５Ｂが接する鋳型面部ｌＢ’の中央部に
おける肉厚ｔ。Therefore, as shown in the cross-sectional view in FIG. 2, the wall thickness tR at the corner lA' of the mold where the corner part 5A of the slab comes into contact is the minimum, and the wall thickness tR at the center part of the mold face lB' where the mold surface part 5B comes into contact t.
を最大とした外側形状が正８角形の鋳型１′が開発され
た。A mold 1' having a regular octagonal outer shape with a maximum of .
この鋳型１′は、機械加工により製造されたもので、間
隙桜の冷却水路２が均一である場合、冷却の進行が最も
速い鋳片かど部５Ａにおいて凝固殻３の形式が促進され
、鋳片面部５Ｂにおいて凝固殻３の形式が最も遅れたも
のとなる。This mold 1' is manufactured by machining, and when the cooling channels 2 of the gap cherry are uniform, the solidification shell 3 is promoted at the corner part 5A of the slab where the cooling progresses fastest, and the shape of the solidified shell 3 is In 5B, the type of solidified shell 3 is the latest.
この結果形式された凝固殻３は鋳片かど部５Ａにおける
厚みｔ４が最大となり、鋳型面部５Ｂの中央部における
厚み（が最小となるから、このようにして形式された鋳
片５は鋳片かど部５Ａの凝固殻３の厚みｔ４に不足のな
いものとなり、ブレイクアウトの発生ははとんどないも
のとなる。As a result, the solidified shell 3 formed in this manner has a maximum thickness t4 at the slab corner 5A, and a minimum thickness (t4) at the center of the mold surface 5B. The thickness t4 of the solidified shell 3 in the portion 5A is sufficient, and the occurrence of breakout is almost impossible.
しかしながら、反面鋳型１′は鋳型隅部ＩＡ’の肉厚ｔ
Ｒが小さいために、この部分の強度が不足する結果とな
って第３図に横断面図で示すような変形を生じるように
なる。However, on the other hand, the mold 1' has a wall thickness t of the mold corner IA'.
Since R is small, the strength of this portion is insufficient, resulting in deformation as shown in the cross-sectional view in FIG. 3.
このような鋳型変形は鋳片にブレイクアウトを誘発させ
る原因となるばかりでなく、鋳型の使用不能を招くこと
にもなる。Such mold deformation not only causes breakout in the slab, but also makes the mold unusable.
この考案は、上述のような観点にもとすき、鋳片かと部
における凝固殻の厚みを十分に大きくすることができ、
かつ鋳型かど部からの変形のおそれのない連続鋳造用鋳
型を提供するもので、肉厚を他部分に比して小さくした
鋳型隅部を有し、この鋳型隅部を加工硬化による最大強
度域に猛威した点に特徴を有するものである。This invention also has the above-mentioned points of view, and it is possible to sufficiently increase the thickness of the solidified shell at the heel of the slab.
The present invention provides a continuous casting mold with no risk of deformation from the mold corner.The mold corner has a wall thickness smaller than that of other parts, and this mold corner is hardened to the maximum strength range by work hardening. It is characterized by the fact that it has become very widespread.
ついで、この考案の連続鋳造用鋳型を実施例により図面
を参照しながら説明する。Next, the continuous casting mold of this invention will be explained by way of examples with reference to the drawings.
第４図には、この考案の連続鋳造鋳型の第１実施例が強
度分布を説明するための平面図で示され。FIG. 4 shows a first embodiment of the continuous casting mold of this invention in a plan view for explaining the strength distribution.
°ている。°is.
図示されるように、この考案の鋳型１″は丸型銅素管よ
り引抜き加工により正４角形に成形されたものであり、
鋳型隅部１Ａ″の肉厚ｔＲは他のいずれの部分よりも小
さく猛威されている。As shown in the figure, the mold 1'' of this invention is formed into a regular square by drawing from a round copper tube.
The wall thickness tR of the mold corner 1A'' is smaller than any other portion.
鋳型面部ＩＢ“の肉厚ｔ。Wall thickness t of mold surface part IB".
は全体に亘って均等であるが、鋳型隅部ＩＡ“の肉厚ｔ
Ｒに比して小さくなっている。is uniform throughout the mold, but the wall thickness t of the mold corner IA
It is smaller than R.
鋳型１″の強度分布において、鋳型隅部ＩＡ“の加工硬
化による最大強度域ａが猛威されるように、ダイスによ
り引抜き加工する際、鋳型隅部の加工率が最大となるよ
うにしである。In the strength distribution of the mold 1'', the machining rate of the mold corner is maximized when drawing with a die so that the maximum strength region a due to work hardening of the mold corner IA'' is maximized.
このように引抜き加工により猛威され、この考案の連続
鋳造用鋳型における鋳型隅部ＩＡ″と鋳型面部１Ｂ″の
肉厚および引張り強度、並びに１００回の連続鋳造にお
けるブレイクアウト発生率を第１表に示した。Table 1 shows the wall thickness and tensile strength of the mold corner IA'' and the mold surface 1B'' in the continuous casting mold of this invention, as well as the breakout incidence after 100 continuous castings. Indicated.
なお、第１表には第１図に示される断面形状をもった従
来鋳型のそれを合せて示した。Table 1 also shows the conventional molds having the cross-sectional shape shown in FIG.
第１表に示されるように、この考案の鋳型においては、
鋳型隅部ＩＡ″の肉厚ｔＲが鋳型面部に比して小さくし
であるために、鋳型外側が高速水流により冷却されてい
る状態で、溶融金属が供給されると、鋳型隅部１Ａ″に
接する鋳片かと部が他部よりもより速く冷却されるので
、鋳片の凝固殻は鋳片かど部において厚くなり、ブレイ
クアウトの発生率がきわめて小さいものとなっており、
鋳型隅部ＩＡ“は引抜き加工によって加工硬化され、最
大強度域ａとなっているので、鋳造操作中に変形を生じ
ることもない。As shown in Table 1, in the mold of this invention,
Since the wall thickness tR of the mold corner IA'' is smaller than that of the mold surface, when molten metal is supplied while the outside of the mold is being cooled by a high-speed water flow, the mold corner IA'' is Since the contacting slab corners cool faster than other parts, the solidified shell of the slab is thicker at the slab corners, and the incidence of breakouts is extremely small.
The mold corner IA" is work hardened by drawing and has the maximum strength region a, so that no deformation occurs during the casting operation.
これに対して、鋳型隅部と鋳造面部の肉厚および強度が
同じである第１図に示される従来鋳型においては、鋳片
かど部におけるブレイクアウトの発生率はきわめて高い
ものであった。On the other hand, in the conventional mold shown in FIG. 1, in which the corner portions of the mold and the casting surface have the same wall thickness and strength, the incidence of breakouts at the corner portions of the slab was extremely high.
第５図に、同様に強度分布を説明するための平面図で示
される第２実施例のこの考案の鋳型は、丸型銅素管より
猛威されたもので、第２図に示されると同一の外形を有
し、外形正８角形に機械加工される以前に、予め冷間鍛
造により塑性加工されて鋳型隅部Ｉ Ａ ”’が加工硬
化され、最大強度域ａが猛威されている。The mold of this invention of the second embodiment, which is also shown in a plan view for explaining the strength distribution in FIG. 5, is the same as that shown in FIG. Before being machined into a regular octagonal external shape, it is plastically worked by cold forging to work harden the mold corner I A '', and the maximum strength region a is strengthened.
この結果形成されたこの考案の鋳型における鋳型隅部Ｉ
Ａ ”’と鋳型面部Ｉ Ｂ ’の肉厚および引張り強
さ、並びに１００回の連続鋳造における鋳型変形発生ま
での鋳造回数を、第２図に示される従来鋳型と対比して
第２表に示した。Mold corner I in the mold of this invention formed as a result
Table 2 shows the wall thickness and tensile strength of A'' and mold surface IB', as well as the number of castings until mold deformation occurs in 100 continuous castings, in comparison with the conventional mold shown in Fig. 2. Ta.
第２表に示されるように、鋳型隅部Ｉ Ａ ”’の強度
を鋳型面部Ｉ Ｂ ”’に比して大きくし、最大強度域
ａを猛威したこの考案の鋳型は１００回の連続鋳造にお
いても全く変形が発生していないのに対して、鋳型隅部
ｌＡ’と鋳型面部ｌ Ｂ’の強度が等しい従来鋳型にお
いては、３０回の連続鋳造で鋳型変形を起臥使用不能と
なった。As shown in Table 2, the mold of this invention, in which the strength of the mold corner I A '' is made larger than that of the mold face I B '', and the maximum strength range a is extremely strong, has a high strength in 100 continuous castings. In contrast, in a conventional mold in which the strength of the mold corner lA' and the mold face lB' were equal, the mold deformed and became unusable after 30 continuous castings.
なお、この考案の鋳型は、丸型銅素管を中子拡管法によ
って中空角形に成形することによっても製造できるが、
この場合も鋳型隅部を加工硬化させて最大強度域を形成
することは勿論である。The mold of this invention can also be manufactured by forming a round copper pipe into a hollow rectangular shape using the core expansion method.
In this case as well, it goes without saying that the corners of the mold are work-hardened to form the maximum strength region.
上述のように、鋳型隅部を薄肉として最大強度域に形成
した、この考案の鋳型によれば、鋳片における鋳片かど
部の凝固殻の厚みを大きくすることができるので、ブレ
イクアウトの発生をきわめて少なくすることができ、一
方鋳型隅部に帰因する鋳型変形も皆無であるので、長期
に亘っての使用が可能となるなどの実用上有用な効果が
もたらされるのである。As mentioned above, according to the mold of this invention, in which the corners of the mold are made thin and formed in the maximum strength range, it is possible to increase the thickness of the solidified shell at the corners of the slab, thereby preventing the occurrence of breakouts. Since there is no mold deformation attributable to the corners of the mold, practical effects such as long-term use are achieved.
第１図は均一肉厚の従来鋳型の横断面図、第２図は不均
一肉厚の従来鋳型の横断面図、第３図は第２図の従来鋳
型の変形態様を示す横断面図、第４図はこの考案の鋳型
の第１実施例を強度分布状態で示した平面図、第５図は
同第２実施例を強度分布状態で示した平面図である。
図面において、１″ １ ｎｔ・・・・・・この考案の
鋳型、ＩＡ”、ＩＡ”’・・・・・・鋳型隅部、ＩＢ”
、ＩＢ”’・・・・・・鋳型面部、ｔＲ・・・・・・鋳
型隅部肉厚、ち・・・・・・鋳型面部肉厚。Fig. 1 is a cross-sectional view of a conventional mold with uniform wall thickness, Fig. 2 is a cross-sectional view of a conventional mold with non-uniform wall thickness, and Fig. 3 is a cross-sectional view showing a modified form of the conventional mold of Fig. 2. FIG. 4 is a plan view showing the first embodiment of the mold of this invention in a state of strength distribution, and FIG. 5 is a plan view showing the second embodiment of the same in a state of strength distribution. In the drawings, 1" 1 nt...Mold of this invention, IA", IA"'...Mold corner, IB"
, IB"'...mold surface, tR...mold corner wall thickness, t...mold surface wall thickness.
Claims (1)
も小さく形式した連続鋳造用鋳型において、前記鋳型隅
部に加工硬化による最大強度域を形式したことを特徴と
する連続鋳造用鋳型。A continuous casting mold in which a wall thickness of a corner part of the mold forming a slab head portion is smaller than that of other parts, characterized in that a maximum strength region by work hardening is formed in the corner part of the mold. Casting mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP967278U JPS6027558Y2 (en) | 1978-01-31 | 1978-01-31 | Continuous casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP967278U JPS6027558Y2 (en) | 1978-01-31 | 1978-01-31 | Continuous casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54116223U JPS54116223U (en) | 1979-08-15 |
| JPS6027558Y2 true JPS6027558Y2 (en) | 1985-08-20 |
Family
ID=28820873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP967278U Expired JPS6027558Y2 (en) | 1978-01-31 | 1978-01-31 | Continuous casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027558Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3218100A1 (en) * | 1982-05-13 | 1983-11-17 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | METHOD FOR PRODUCING A TUBE CHOCOLATE WITH A RECTANGULAR OR SQUARE CROSS SECTION |
| JPH0834447B2 (en) * | 1987-06-03 | 1996-03-29 | 三菱電機株式会社 | Portable communication device |
-
1978
- 1978-01-31 JP JP967278U patent/JPS6027558Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54116223U (en) | 1979-08-15 |
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