JPH0685986B2 - Continuous casting method - Google Patents
Continuous casting methodInfo
- Publication number
- JPH0685986B2 JPH0685986B2 JP32519187A JP32519187A JPH0685986B2 JP H0685986 B2 JPH0685986 B2 JP H0685986B2 JP 32519187 A JP32519187 A JP 32519187A JP 32519187 A JP32519187 A JP 32519187A JP H0685986 B2 JPH0685986 B2 JP H0685986B2
- Authority
- JP
- Japan
- Prior art keywords
- machine
- slab
- cooling
- solidified
- unsolidified
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 238000009749 continuous casting Methods 0.000 title claims description 10
- 238000001816 cooling Methods 0.000 claims description 37
- 238000005266 casting Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000007796 conventional method Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は鋳片、特にスラブの連続鋳造方法に関する。TECHNICAL FIELD The present invention relates to a continuous casting method for cast slabs, particularly slabs.
従来、高温鋳片を得る方法としては、基本的には特開昭
62-64462にも示されているように、未凝固複熱を行い、
完全凝固端（以下クレータエンドという）を機端とほぼ
同位置もしくは機内となるように鋳造速度あるいは２次
冷却帯の冷却水量の調整を行うことが知られている。Conventionally, as a method for obtaining a high-temperature cast slab, there is basically a method of
As shown in 62-64462, the unsolidified double heat is applied,
It is known to adjust the casting speed or the amount of cooling water in the secondary cooling zone so that the completely solidified end (hereinafter referred to as crater end) is located at the same position as or inside the machine end.
さらに、特開昭57-17360のように、未凝固部分の幅方向
プロフィールを鋳片横断面（幅×厚の断面）にてドック
ホーン形状にすることが好ましいとして、鋳片の端部を
保温する工夫もされている。Furthermore, as in JP-A-57-17360, it is preferable that the width direction profile of the unsolidified portion is a dock horn shape in the transverse section (width × thickness section) of the slab, and the end of the slab is kept warm. It is also devised to do so.
何れの場合も、クレータエンド位置はほぼ機端か機内に
位置させて行っている。その理由としては、クレータエ
ンドが機外に出ると鋳片がロール等によってサポートさ
れないため、溶鋼静圧により、凝固殻が膨らむ、いわゆ
るバルジングが発生する危険がある。In either case, the crater end position is set to be near the machine end or inside the machine. The reason for this is that when the crater end goes out of the machine, the cast piece is not supported by rolls, etc., so that there is a risk of so-called bulging, in which the solidified shell swells due to the static pressure of molten steel.
このバルジングを防止するためには、従来、クレータエ
ンドを機端位置以内にしなければならないと考えられて
いた。そのため、鋳造速度は鋳型内湯面から、鋳片をサ
ポートしている最下端ロールまでの距離、すなわち機長
によって制約を受け、次式により鋳込最大速度VRmaxが
制限されていた。In order to prevent this bulging, it was conventionally thought that the crater end had to be within the machine end position. Therefore, the casting speed is restricted by the distance from the molten metal surface in the mold to the lowermost roll supporting the slab, that is, the machine length, and the maximum casting speed V Rmax is limited by the following formula.
ここで、 VRmax：鋳込最大速度 m/分 ｄ ：鋳片厚み mm Ks ：凝固定数 mm/分1/2 Ｌ ：機長 ｍ である。 Here, V Rmax : maximum casting speed m / min d: slab thickness mm Ks: solidification constant mm / min 1/2 L: machine length m.
上記（１）式よりVRmaxを増大させるためには機内での
冷却強度を大きくとり、Wsを増加させることが考ええら
れる。しかし、Ksの増大は鋳片温度の低下を意味し、近
年の直送圧延および直送炉装入等の省エネルギー技術に
対して相反することである。In order to increase V Rmax from the above formula (1), it is conceivable to increase the cooling strength in the machine and increase Ws. However, an increase in Ks means a decrease in the slab temperature, which is contrary to the recent energy-saving techniques such as direct-feed rolling and direct-feed furnace charging.
さらに機長Ｌを増大させるか、もしくは鋳片厚みｄを小
さくしてを良いが何れも大掛かりな改造を必要とし、得
策でない。Further, the machine length L may be increased or the cast piece thickness d may be reduced, but both of them require large-scale modification, which is not a good idea.
従来は第２図のごとく、鋳込み方向６の方向に連続鋳造
されている鋳片１の未凝固部２のクレータエンド部10
は、機端５とほぼ同じ（記号Ａで示す位置）かあるいは
機端５の手前（記号Ｃで示した位置）に位置するように
鋳造されているため、サポートロール４は鋳片の凝固殻
が溶鋼静圧によってバルジングすることを防止してい
る。しかし、クレータエンド10が記号Ｂで示すように機
外に出ると、鋳片１をサポートするロールがないため、
凝固殻３は溶鋼静圧に耐え切れず膨らみ3aを生ずること
になる。この膨らみ3aは膨らみ速度が凝固殻３の成長速
度よりも大きい場合には膨らみを停止せず、拡大し続け
ることになり、鋳造の継続は不可能となる。Conventionally, as shown in FIG. 2, the crater end portion 10 of the unsolidified portion 2 of the cast piece 1 which is continuously cast in the casting direction 6 is used.
Is cast so that it is located almost at the same position as the machine end 5 (position indicated by symbol A) or in front of the machine end 5 (position indicated by symbol C). Therefore, the support roll 4 is a solidified shell of a slab. Prevents bulging due to static pressure of molten steel. However, when the crater end 10 goes out of the machine as shown by the symbol B, there is no roll supporting the slab 1,
The solidified shell 3 cannot withstand the static pressure of molten steel and bulges 3a. When the expansion rate of the bulge 3a is higher than the growth rate of the solidified shell 3, the bulge 3a does not stop and continues to expand, making it impossible to continue casting.
本発明は、バルジングを防止し、従来機長によってほぼ
決定されていた最大鋳造速度、鋳片最高温度を大掛かり
な改造を行うことなく、増加させ得る鋳造方法を提供す
る。The present invention provides a casting method capable of preventing bulging and increasing the maximum casting speed and the maximum temperature of a slab, which are almost determined by the conventional captain, without making a large-scale modification.
本発明は、連続鋳造に際し、鋳片長辺面に対して少なく
とも１箇所の強冷と他部位の弱冷を下記の水量密度範囲
で行うと共に、鋳造速度を調整し、強冷部に対応する未
凝固部を機端以内で完全凝固させ、弱冷部のクレータエ
ンド位置を機端以降として鋳造することを特徴とする鋳
片の連続鋳造方法である。The present invention, during continuous casting, performs strong cooling of at least one location and weak cooling of other locations with respect to the long side surface of the slab within the following water amount density range, adjusts the casting speed, and corresponds to the uncooled portion. This is a continuous casting method for cast slabs, characterized in that the solidified portion is completely solidified within the machine end and casting is performed with the crater end position of the weakly cooled portion being after the machine end.
Ｗ ：強冷部の水量密度l/分・cm2 Ｗ′：弱冷部の水量密度l/分・cm2 Wm:平均の水量密度l/分・cm2 〔作用〕 以下本発明をその作用と共に詳細に説明する。 W: Water quantity density 1 / min · cm 2 W in the strongly cooled part W ′: Water quantity density 1 / min · cm 2 Wm in the weakly cooled part: Average water content density 1 / min · cm 2 [Operation] It will be described in detail together with.
本発明は、鋳片のバルジングを防止するためのサポート
ロール群と鋳片を冷却凝固させるためのスプレー等の冷
却設備を有する２次冷却帯において、鋳片を幅方向に分
割し、鋳片幅方向端部を除いて端部から順に分割部を交
互に冷却強度を弱冷、強冷とする。これにより、強冷部
は機端とほぼ同位置もしくは機内で完全に凝固させ、弱
冷部は機外まで未凝固とする。このようにして、鋳片の
未凝固部を幅方向に２分割以上とし、未凝固部のクレー
タエンド位置を機外となるようにして鋳造することによ
り、最大鋳造速度および最高鋳片温度を従来よりも大き
くする。The present invention, in a secondary cooling zone having a support roll group for preventing bulging of a cast piece and a cooling facility such as a spray for cooling and solidifying the cast piece, divides the cast piece in the width direction to obtain a cast piece width. The cooling strength is set to weak cooling and strong cooling alternately from the end except the end in the direction. As a result, the strong cooling part is completely solidified at the same position as the machine end or in the machine, and the weak cooling part is not solidified outside the machine. In this way, the unsolidified part of the slab is divided into two or more parts in the width direction, and the crater end position of the unsolidified part is cast out of the machine, so that the maximum casting speed and the maximum slab temperature can be increased. Bigger than.
以下に機端において幅方向端部より、凝固相、未凝固
相、凝固相、未凝固相、凝固相となるように冷却強度を
変化させた場合を例にとって本発明について詳細に述べ
る。The present invention will be described in detail below by taking as an example the case where the cooling strength is changed from the end in the width direction at the machine end to a solidified phase, an unsolidified phase, a solidified phase, an unsolidified phase, and a solidified phase.
第１図に示すように、機内において鋳片幅の例えば中央
部に強制冷却域７を定め、この部分のみを強冷するよう
に２次冷却水のスプレー水の幅方向分布を中央部のみ多
くすることにより、中央部のみクレータエンド位置を機
端と同じ位置にコントロールすれば、機外にては第３図
（ｂ）のごとく、未凝固部２が２分割される。なお、未
凝固部２が幅方向に33分割以上になっても差し支えな
い。このようにすれば、鋳片幅中央部の完全凝固相がサ
ポートロール４と同じような作用をするため、機外にク
レータエンド10が位置しても鋳片１のバルジングを小さ
く抑えることができる。As shown in FIG. 1, a forced cooling zone 7 is defined in the center of the width of the slab in the machine, and the distribution of the spray water of the secondary cooling water in the width direction is increased only in the central portion so that only this portion is strongly cooled. By doing so, if the crater end position is controlled to the same position as the machine end only in the central portion, the uncoagulated portion 2 is divided into two outside the machine as shown in FIG. 3 (b). The unsolidified portion 2 may be divided into 33 or more in the width direction. By doing so, the completely solidified phase in the central portion of the slab width acts like the support roll 4, so that the bulging of the slab 1 can be suppressed even if the crater end 10 is located outside the machine. .
本法を実現するためには、鋳片幅方向の冷却強度は第４
図に示す如く、例えば中央部の冷却強度をｑ（Kcal/m2
・hr）とし、幅方向の平均冷却強度をqm（Kcal/m2・h
r）とすると、 となるように制御することが望ましい。In order to realize this method, the cooling strength in the width direction of the slab is 4th.
As shown in the figure, for example, the cooling strength of the central part is q (Kcal / m 2
・ Hr) and the average cooling strength in the width direction is qm (Kcal / m 2 · h
r) It is desirable to control so that
q/qmが1.05より小さいと未凝固部が分割されず、1.4よ
り大きいと、クレータエンドのプロフィールが長すぎ内
部割れ等の鋳片欠陥が大きくなる。第５図に機端での未
凝固長さと内部割れの関係を示す。If q / qm is less than 1.05, the unsolidified portion is not divided, and if it is more than 1.4, the profile of the crater end is too long, and slab defects such as internal cracking increase. Fig. 5 shows the relationship between the unsolidified length at the machine end and internal cracking.
また強冷、弱冷の冷却強度を各々q.q′とし、qm＝（ｑ
＋ｑ′）/2と「定義すると上式は、 となり、これから が得られる。」 一方、冷却強度と冷却水量の間には密接な関係があるこ
とが一般的に知られており、冷却強度をｑ（Kcal/m2・h
r）、水量密度をＷ（l/分cm2）とした際に、 ｑ∞Ｗα α≒0.4〜0.8 という関係が成立する。Also, the cooling strengths of strong cooling and weak cooling are respectively set to qq ′, and qm ＝ (q
+ Q ') / 2 "By definition, And from now on Is obtained. On the other hand, it is generally known that there is a close relationship between the cooling strength and the amount of cooling water, and the cooling strength is q (Kcal / m 2 · h
r), and the water density is W (l / min cm 2 ), the relationship of q∞W α α ≈0.4 to 0.8 holds.
αは各連鋳機により、また冷却手段により異なるが大略
0.4〜0.8である。α varies depending on each continuous casting machine and cooling means, but is roughly
It is 0.4 to 0.8.
よって、強冷のｑ、弱冷のｑ′、平均冷却のqmに対応す
る水量密度をそれぞれW.W′.Wmとすれば、 より、 という関係が冷却水に対して与えられる。Therefore, if water density corresponding to q for strong cooling, q'for weak cooling, and qm for average cooling is WW'.Wm, Than, Is given to the cooling water.
本発明のバルジング量と従来法によりクレータエンドが
機外に位置する場合のバルジング量とを比較する。鋳片
バルジング挙動は一般に両端固定支持梁によるたわみ挙
動と見なされているため、最大バルジング量δmaxは ここで、 Ｐ ：溶鋼静圧 Kg/cm2 Wl:未凝固部幅 cm Ｅ ：平均ヤング率 Kg/cm2 ds:凝固厚み cm 従来法では第３図（ａ）に示すように、 Wl＝Ｂ−2t …（３） 本発明では Wl＝（Ｂ−2t−Ｂ′）/n …（４） で示される。ここに、 Ｂ ：鋳片幅 ｔ ：端部から最初の未凝固相までの幅 Ｂ′ ：端部凝固相を除く凝固相の幅の和 ｎ ：未凝固相部の数 である。The bulging amount of the present invention is compared with the bulging amount when the crater end is located outside the machine by the conventional method. Since the slab bulging behavior is generally regarded as the bending behavior due to the support beams fixed at both ends, the maximum bulging amount δmax is Here, P: static pressure of molten steel Kg / cm 2 Wl: width of unsolidified part cm E: average Young's modulus Kg / cm 2 ds: solidified thickness cm In the conventional method, as shown in FIG. 3 (a), Wl = B −2t (3) In the present invention, Wl = (B−2t−B ′) / n (4) Here, B: slab width t: width from end to first unsolidified phase B ': sum of widths of solidified phases excluding end solidified phase n: number of unsolidified phase parts.
第３図（ａ）と第３図（ｂ）を次の条件で比較する。FIG. 3 (a) and FIG. 3 (b) are compared under the following conditions.
鋳片幅B:1200mm 鋳片厚:230mm 端部凝固相幅t:163mm であり、第３図（ｂ）においては、 未凝固相の数n:2個 端部凝固相以外の凝固相の幅Ｂ′:1個230mm とすると、ｋを比例定数として、 となり、この（５）、（６）の値の比は、 となる。すなわち、従来法に対してバルジング量は２％
まで減少することになる。Slab width B: 1200 mm Slab thickness: 230 mm Edge solidified phase width t: 163 mm. In Fig. 3 (b), the number of unsolidified phases n: 2 The width of solidified phases other than the edge solidified phase B ': If one piece is 230 mm, k is a proportional constant, And the ratio of the values of (5) and (6) is Becomes That is, the bulging amount is 2% compared to the conventional method.
Will be reduced to.
以上より、バルジング量を従来法より非常に小さくする
ことが可能な本発明では、バルジング速度を凝固殻の成
長速度より非常に小さく押えられるため、機外にクレー
タエンドを位置させて鋳造してもバルジングの心配はな
くなる。From the above, in the present invention in which the amount of bulging can be made extremely smaller than that of the conventional method, the bulging speed can be suppressed to be much smaller than the growth rate of the solidified shell, and therefore even if the crater end is located outside the machine and cast. No more worrying about bulging.
このような鋳造方法では鋳込方向の未凝固長さｌを有効
に利用できるため、最大鋳込速度Vmaxとして、 という最大鋳造速度を取ることができる。In such a casting method, the unsolidified length l in the casting direction can be effectively utilized, so that the maximum casting speed Vmax is It can take the maximum casting speed.
例えばｄ＝230mm Ks＝28mm/分 Ｌ＝36mとする。For example, d = 230 mm Ks = 28 mm / min L = 36 m.
この時、もしｌ＝4mとすれば、従来の VRmax＝2.13m/分に対し、 本発明では、 VRmax＝2.37m/分 となり、11％の鋳造速度の向上が見込まれる。At this time, if l = 4 m, V Rmax = 2.37 m / min in the present invention, in contrast to the conventional V Rmax = 2.13 m / min, which is expected to improve the casting speed by 11%.
すなわち、従来法での機長4m増加分をスプレーの冷却分
布を変えるのみで達成し得ることとなり、大規模の改造
工事は不要となる。In other words, an increase of 4 m in the conventional method can be achieved simply by changing the cooling distribution of the spray, and no large-scale modification work is required.
またさらには機外にて未凝固部を凝固させるため、未凝
固部の熱放散は大気放冷であり、スプレー冷却に対し、
1/3〜1/4と充分小さいため、凝固潜熱を鋳片の保温に有
効利用でき、内部割れのない高温鋳片を製造することが
できる。Furthermore, since the non-solidified portion is solidified outside the machine, the heat dissipation of the non-solidified portion is air cooling, which is different from spray cooling.
Since it is sufficiently small at 1/3 to 1/4, the latent heat of solidification can be effectively used for heat retention of the slab, and a high temperature slab without internal cracks can be manufactured.
実施例１ 従来、低炭Alキルド鋼スラブ鋳片260mm厚×1240幅のス
ラブの最大鋳造速度は機長36.2mの連鋳機において、1.6
m/minであったが、鋳片幅中央部200mm部を２次冷却帯全
域において他部位よりも20％冷却水を増して鋳造抜熱量
を10％増したところ、最大鋳造速度を1.8m/minに増加す
ることができ、かつ従来の鋳片切断後の断面平均温度、
1105℃を1205℃に上昇させることができた。Example 1 Conventionally, the maximum casting speed of a slab having a low carbon Al killed steel slab slab of 260 mm thickness and 1240 width is 1.6 in a continuous casting machine having a machine length of 36.2 m.
Although it was m / min, the maximum casting speed of 1.8m / can be increased to min, and the average cross-sectional temperature after cutting the conventional slab,
It was possible to raise 1105 ° C to 1205 ° C.
実施例２ 実施例Iと同一鋼種、同一の連鋳機でのスラブ寸法230mm
厚×1000mm幅の最大鋳造速度は2.05m/minであったが、
機端前後1mの位置において非接触式電磁超音波計による
未凝固部検出を幅方向に行い、中央部クレータエンドを
機端前後1m内に位置させつつ、幅中央部200mm部を30
％、抜熱量で15％二次冷却水を増量して鋳造したとこ
ろ、最大鋳造速度を2.30m/minに増加することができ、
鋳片断面平均温度が1245℃から1312℃に増加した。Example 2 Slab dimensions of the same steel type and the same continuous casting machine as in Example I 230 mm
The maximum casting speed of thickness × 1000 mm width was 2.05 m / min,
At the position 1m before and after the machine edge, the non-coagulated part was detected in the width direction by a non-contact type electromagnetic ultrasonic meter, and the center crater end was positioned within 1m before and after the machine edge, and the width center part 200mm was 30
%, By increasing the secondary cooling water by 15% by heat removal amount and casting, the maximum casting speed can be increased to 2.30 m / min,
The average temperature of the slab cross section increased from 1245 ℃ to 1312 ℃.
各連鋳機によりほぼ決まる最大鋳造速度の増加を、機長
を延長することなしに、２次冷却水の幅方向分布のみを
変更することによって達成することができる。An increase in maximum casting speed that is substantially determined by each continuous casting machine can be achieved by changing only the widthwise distribution of the secondary cooling water without extending the machine length.
また、未凝固のまま機外に位置させて鋳造することがで
きるので、従来以上に生産性を増加させて高温鋳片を製
造することが可能となる。また水量密度の限定により鋳
片の内部割れを防止することもできる。In addition, since it can be cast outside the machine without being solidified, it is possible to manufacture a high temperature cast piece with increased productivity more than ever before. In addition, internal cracking of the slab can be prevented by limiting the water amount density.
従って、鋳片の直送圧延法、直接圧延法の実施に大きく
貢献する。Therefore, it greatly contributes to the implementation of the direct rolling method and the direct rolling method of the slab.
第１図は本発明を実施した場合の機端近傍および機外に
おけるクレータエンド位置と形状を示す説明図、第２図
は従来法で鋳造する場合の機端近傍におけるクレータエ
ンドの位置を示す説明図、第３図は機端近傍における未
凝固鋳片断面図で、（ａ）は従来法、（ｂ）は本発明法
の場合の模式図、第４図は強冷冷却強度と平均冷却強度
との比に対する未凝固部長さの関係を示すグラフ、第５
図は未凝固長さと内部割れ発生率との関係を示すグラフ
である。 １…鋳片、２…未凝固部 ３…凝固殻、４…サポートロール ５…機端、６…進行方向 ７…強制冷却域、10…クレータエンドFIG. 1 is an explanatory view showing the crater end position and shape near the machine end and outside the machine when the present invention is carried out, and FIG. 2 is an explanation showing the crater end position near the machine end when casting by a conventional method. Figures and 3 are cross-sectional views of unsolidified slab near the machine end. (A) is a conventional method, (b) is a schematic view of the method of the present invention, and Fig. 4 is a strong cooling strength and an average cooling strength. Graph showing the relationship of the length of the unsolidified portion to the ratio with
The figure is a graph showing the relationship between the unsolidified length and the occurrence rate of internal cracks. 1 ... Cast piece, 2 ... Unsolidified part 3 ... Solidified shell, 4 ... Support roll 5 ... Machine end, 6 ... Direction of travel 7 ... Forced cooling area, 10 ... Crater end
───────────────────────────────────────────────────── フロントページの続き (72)発明者 清水 益人 千葉県千葉市川崎町１番地 川崎製鉄株式 会社千葉製鉄所内 (56)参考文献 特開 昭62−142056（ＪＰ，Ａ) 特開 昭59−45069（ＪＰ，Ａ) 特開 昭57−97805（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masuhito Shimizu 1 Kawasaki-cho, Chiba-shi, Chiba Inside the Chiba Works, Kawasaki Steel Co., Ltd. (56) References JP 62-142056 (JP, A) JP 59 -45069 (JP, A) JP-A-57-97805 (JP, A)
Claims (1)
くとも１箇所の強冷と他部位の弱冷を下記の水量密度範
囲で行うと共に、鋳造速度を調整し、強冷部に対応する
未凝固部を機端以内で完全凝固させ、弱冷部のクレータ
エンド位置を機端以降として鋳造することを特徴とする
鋳片の連続鋳造方法。 Ｗ ：強冷部の水量密度l/分・cm2 Ｗ′：弱冷部の水量密度l/分・cm2 Wm:平均の水量密度l/分・cm2 1. At the time of continuous casting, at least one portion of the long side surface of the slab is subjected to strong cooling and weak cooling of other portions within the following water amount density range, and the casting speed is adjusted to correspond to the strong cooling portion. A continuous casting method for cast slabs, characterized in that an unsolidified portion is completely solidified within the machine end and the crater end position of the weakly cooled portion is cast after the machine end. W: Water volume density in strong cooling part 1 / min ・ cm 2 W ': Water density density in weak cooling part 1 / min ・ cm 2 Wm: Average water density 1 / min ・ cm 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32519187A JPH0685986B2 (en) | 1987-12-24 | 1987-12-24 | Continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32519187A JPH0685986B2 (en) | 1987-12-24 | 1987-12-24 | Continuous casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166872A JPH01166872A (en) | 1989-06-30 |
| JPH0685986B2 true JPH0685986B2 (en) | 1994-11-02 |
Family
ID=18174028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32519187A Expired - Lifetime JPH0685986B2 (en) | 1987-12-24 | 1987-12-24 | Continuous casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0685986B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5098394B2 (en) * | 2007-03-29 | 2012-12-12 | Ｊｆｅスチール株式会社 | Continuous casting slab manufacturing method, continuous casting machine |
-
1987
- 1987-12-24 JP JP32519187A patent/JPH0685986B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01166872A (en) | 1989-06-30 |
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