JPS6054257A - Method for controlling position of solidification completion point in continuous casting - Google Patents

Method for controlling position of solidification completion point in continuous casting

Info

Publication number
JPS6054257A
JPS6054257A JP16144283A JP16144283A JPS6054257A JP S6054257 A JPS6054257 A JP S6054257A JP 16144283 A JP16144283 A JP 16144283A JP 16144283 A JP16144283 A JP 16144283A JP S6054257 A JPS6054257 A JP S6054257A
Authority
JP
Japan
Prior art keywords
completion point
solidification completion
billet
calculated
slab
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.)
Pending
Application number
JP16144283A
Other languages
Japanese (ja)
Inventor
Yujiro Nakamura
中村　雄二郎
Munehito Mizuno
水野　宗人
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.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
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 Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP16144283A priority Critical patent/JPS6054257A/en
Publication of JPS6054257A publication Critical patent/JPS6054257A/en
Pending legal-status Critical Current

Links

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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To maintain the solidification completion point of a continuously cast billet within a specified range by correcting parameters such as heat transfer rate, etc. in the simulation calculation for estimating the inside of the billet, calculating the predicted solidification completion point and controlling the cooling of the billet. CONSTITUTION:The surface temp., shell thickness and solidification completion point of a billet 1 are calculated by a simulation calculation which estimates the condition in a continuously cast billet 1. The calculated surface temp. is compared with the actually measured values of several pieces of surface thermometers 6 for the billet and the parameters such as heat transfer rate, etc. in the claculation are corrected. The content of the calculation is corrected to the actual cooling condition of the billet. The feed rate of a coolant 3 is adjusted by a control device 5 having such calculated content and the predicted solidification completion point is so controlled as to be maintained within a specified range even if the operating conditions of the billet 1 vary.

Description

【発明の詳細な説明】 この発明は、連続鋳造の凝固完了点位１８制御方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling solidification completion point 18 in continuous casting.

連続鋳造設備において、凝固完了点位置を制御すること
は以下の意味に於て重要である。In continuous casting equipment, controlling the solidification completion point position is important for the following reasons.

すなわち０８４種により凝固完了点が矯正点を越えると
、固液境界層が許容歪を越え内部割れを生じる。＠凝固
完了点付近に於てバルジングを生じると、偏析やセンタ
ーポロシティが発生し易くなる。In other words, when the solidification completion point exceeds the straightening point due to type 084, the solid-liquid boundary layer exceeds the allowable strain and internal cracks occur. @If bulging occurs near the solidification completion point, segregation and center porosity are likely to occur.

ところが、２次冷却帯における鉤片冷却剤のスプレー量
制御に関する主流技術は、一般にカスケード制御と呼ば
れるもので、ｖｉ片ｌ々当りの冷却水ｍ　１ｆｌ−比水
量−が一定となるように、鋳込速度にう場合鋳片速度を
変化させねばならず、鋳片の品質上問題を生ずる。However, the mainstream technology for controlling the spray amount of hook piece coolant in the secondary cooling zone is generally called cascade control, in which the cooling water m 1 fl - specific water amount - per VI piece is fixed. If the loading speed is changed, the slab speed must be changed, which causes problems in the quality of the slab.

さらに、タンディツシュ交換、異鋼種連連鋳等の非定常
鋳込が行われた場合、スプレー量が対応できず過冷却等
により期待した凝固完了点を全く外れる結果となる。Furthermore, when unsteady casting is performed such as tundish replacement or continuous casting of different steel types, the spray amount cannot be adjusted and the expected solidification completion point is completely exceeded due to supercooling and the like.

本発明は上記問題点に鑑みなされたもので、凝固点 完了Ｖを予測しその凝固完了予測点をある一定範囲内に
収めるように鋳片冷却剤スプレーｆ！ｋを制御すること
を特徴とするものである。The present invention was made in view of the above-mentioned problems, and sprays a slab coolant f! so as to predict the solidification point completion V and keep the predicted solidification completion point within a certain range. This method is characterized by controlling k.

次に図面に従い本発明の実施例につき説明する。Next, embodiments of the present invention will be described with reference to the drawings.

連続鋳造の鋳片ｌは鋳型２を通過した後に、水等の冷却
剤８のスプレーを受ける。After the continuously cast slab 1 passes through the mold 2, it is sprayed with a coolant 8 such as water.

冷却剤３の供給量は弁４によって調整されている。The supply of coolant 3 is regulated by a valve 4.

多くの場合冷却剤８をうける領域は多数の小区間に分割
されており、各区間のスプレー量は単独に設定される。In many cases, the area receiving the coolant 8 is divided into a number of small sections, and the spray amount for each section is set independently.

多くの弁の操作を指令する部分が制御液ｆ５である。６
は、鋳片表面温度針で、通常鋳片表面上に多数個設置し
、鋳片表面温度を連続的に測定する。The control fluid f5 is the part that commands the operations of many valves. 6
These are slab surface temperature needles, which are usually installed in large numbers on the slab surface and continuously measure the slab surface temperature.

鋳片内部の状態を推定するシミュレーＶｇン計算により
ある操業条件、ある冷却状態にある鋳片の任意の点の、
鋳片表面温度、シェル厚及び凝固完了点を算出する。算
出した表面温度は、数個の鋳片表面温度計６の実測値と
比較し、計算における熱伝達率等のパラメータを補正し
、計算内容が実際の鋳片冷却状態に近くシミュレートす
る様にする。この計算よりめた凝固完了予測点を連鋳片
１の鋳込速度等の操業条件が変動しても一定範囲内に入
る横制御装置５を通して、冷却剤８の供給量を弁４の開
度な加減することにより制御する。At any point of the slab under certain operating conditions and cooling conditions, the simulation Vgn calculation that estimates the internal state of the slab is
Calculate the slab surface temperature, shell thickness, and solidification completion point. The calculated surface temperature is compared with the actual values measured by several slab surface thermometers 6, and parameters such as the heat transfer coefficient in the calculation are corrected so that the calculated content closely simulates the actual slab cooling state. do. The supply amount of the coolant 8 is controlled by the opening of the valve 4 through the horizontal control device 5, which keeps the predicted solidification completion point determined from this calculation within a certain range even if the operating conditions such as the casting speed of the continuous slab 1 fluctuates. It is controlled by adjusting the amount.

凝固完了点は公知の鋲打法等により鋳片のシェル厚さ測
定することにより確認し、予測値と対比を行う。The solidification completion point is confirmed by measuring the shell thickness of the slab using a known riveting method, etc., and compared with the predicted value.

このように本発明は構成されているため、凝固完了点が
矯正点を越えると内部割れを生ずる鋼種のらず。Since the present invention is configured as described above, the steel type cracks that cause internal cracks when the solidification completion point exceeds the straightening point.

また凝固完了点を一定に保つことができるためバルジン
グを生じた場合鉤片を適確にサポートすることが可能で
ある。Furthermore, since the solidification completion point can be kept constant, it is possible to accurately support the hook piece when bulging occurs.

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

図は本発明の凝固完了点位置制御方式を示す概略図であ
る。 ｌ・・・鋳片　２・・・鋳型　３・・・冷却剤４・・・
弁　５・・・制御装侃 ６・・・梼片表面温度計The figure is a schematic diagram showing the solidification completion point position control system of the present invention. l... Slab 2... Mold 3... Coolant 4...
Valve 5... Control equipment 6... Lap surface thermometer

Claims (1)

【特許請求の範囲】[Claims] 連続鋳造鋳片の内部を推定するシミー、レーシッン計算
により、鋳片の表面温度、シェル厚及び凝固完了点を算
出し、算出した表面温度を数点の実測値と対比させ、計
算における熱伝達率等のバフメータを補正し、凝固完了
点位置を計算により算出し、操業条件が変動しても、該
凝固完了予測点をある一定範囲内に収める様に鋳片冷却
剤スプレー量を制御することを特徴とする連続ｆＲ造の
凝固完了点位置制御方法The surface temperature, shell thickness, and solidification completion point of the slab are calculated by shimmy and raysing calculations to estimate the inside of the continuously cast slab, and the calculated heat transfer coefficient is calculated by comparing the calculated surface temperature with the actual measured values at several points. etc., the solidification completion point position is calculated by calculation, and even if operating conditions change, the amount of slab coolant spray is controlled so that the predicted solidification completion point is within a certain range. Characteristic method for controlling the solidification completion point position of continuous fR construction
JP16144283A 1983-08-31 1983-08-31 Method for controlling position of solidification completion point in continuous casting Pending JPS6054257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16144283A JPS6054257A (en) 1983-08-31 1983-08-31 Method for controlling position of solidification completion point in continuous casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16144283A JPS6054257A (en) 1983-08-31 1983-08-31 Method for controlling position of solidification completion point in continuous casting

Publications (1)

Publication Number Publication Date
JPS6054257A true JPS6054257A (en) 1985-03-28

Family

ID=15735190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16144283A Pending JPS6054257A (en) 1983-08-31 1983-08-31 Method for controlling position of solidification completion point in continuous casting

Country Status (1)

Country Link
JP (1) JPS6054257A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767273A1 (en) * 1997-08-14 1999-02-19 Vallourec Ind Continuous casting of steel products notably for subsequent production of seamless tubes
JP2013052405A (en) * 2011-09-02 2013-03-21 Jfe Steel Corp Method and device for calculating solidification-completing position of cast slab
JP2013126669A (en) * 2011-12-16 2013-06-27 Jfe Steel Corp Method and device for estimating temperature of slab
WO2013094194A1 (en) * 2011-12-21 2013-06-27 Ｊｆｅスチール株式会社 Method for estimating slab temperature in continuous casting, method for estimating coagulation completion state of slab, and method for continuous casting
WO2014027543A1 (en) * 2012-08-14 2014-02-20 Ｊｆｅスチール株式会社 Method for controlling solidification completion position and device for controlling solidification completion position

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767273A1 (en) * 1997-08-14 1999-02-19 Vallourec Ind Continuous casting of steel products notably for subsequent production of seamless tubes
JP2013052405A (en) * 2011-09-02 2013-03-21 Jfe Steel Corp Method and device for calculating solidification-completing position of cast slab
JP2013126669A (en) * 2011-12-16 2013-06-27 Jfe Steel Corp Method and device for estimating temperature of slab
WO2013094194A1 (en) * 2011-12-21 2013-06-27 Ｊｆｅスチール株式会社 Method for estimating slab temperature in continuous casting, method for estimating coagulation completion state of slab, and method for continuous casting
JPWO2013094194A1 (en) * 2011-12-21 2015-04-27 Ｊｆｅスチール株式会社 Slab temperature estimation method in continuous casting, solidification completion state estimation method of slab, and continuous casting method
WO2014027543A1 (en) * 2012-08-14 2014-02-20 Ｊｆｅスチール株式会社 Method for controlling solidification completion position and device for controlling solidification completion position
JP5585739B2 (en) * 2012-08-14 2014-09-10 Ｊｆｅスチール株式会社 Solidification completion position control method and solidification completion position control device
CN104540617A (en) * 2012-08-14 2015-04-22 杰富意钢铁株式会社 Method for controlling solidification completion position and device for controlling solidification completion position

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