EP2291252A1 - Verfahren zur vorhersage der entstehung von längsrissen beim stranggiessen - Google Patents
Verfahren zur vorhersage der entstehung von längsrissen beim stranggiessenInfo
- Publication number
- EP2291252A1 EP2291252A1 EP09761302A EP09761302A EP2291252A1 EP 2291252 A1 EP2291252 A1 EP 2291252A1 EP 09761302 A EP09761302 A EP 09761302A EP 09761302 A EP09761302 A EP 09761302A EP 2291252 A1 EP2291252 A1 EP 2291252A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- determined
- thermocouples
- mold
- over
- longitudinal
- 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.)
- Ceased
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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
-
- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
-
- 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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
- B22D11/202—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by measuring temperature
Definitions
- the invention relates to a method for predicting the formation of longitudinal cracks in the continuous casting of steel slabs, wherein the local strand temperature is measured by distributed in the mold wall thermocouples arranged.
- thermoelet rows following the strand can confirm defects and secure results.
- a temporal correction of the thermocouple signals in the different rows should be provided. The correction value results from the distance measure of the thermocouple rows and the current strand speed, since the defect is localized in the strand surface.
- each mold has your personal "fingerprint” (self-pattern, identity picture) through the above two facts.
- the object of the invention is to provide a method for predicting the risk of longitudinal cracks.
- This object is achieved according to the invention with a method for predicting the formation of longitudinal cracks in the continuous casting of steel slabs, wherein the local strand temperature is measured by distributed in the mold wall thermocouples, characterized in that taking into account the current, measured by the arranged in the mold thermocouples temperature values and on the basis of the temperature values determined in a crack-free state, a statistical evaluation of the risk of longitudinal crack-induced breakage of the strand takes place.
- this is a model-based method, e.g. Principal Componenet Analysis (PCA or Principal Components Analysis).
- PCA Principal Componenet Analysis
- Principal Components Analysis e.g. Principal Componenet Analysis
- This model is obtained from a historical dataset without longitudinal tears.
- the model describes the condition without the occurrence of the desired defect.
- each PCA alarm is evaluated and decided whether there is a longitudinal crack or other unspecified defect.
- the expert system performs confirmation of PCA alarms.
- the basis of this method is the two-stage process described above.
- the fault detection is performed by a model-based method.
- This model-based method compares the current state of the plant with the normal state, which was determined from historical data. Downstream, an expert system evaluates the signals of the thermocouples which are arranged one above the other in a column and are passed successively from the longitudinal crack. This is where Fault Identification and Fault Isolation are performed. It is decided on the basis of the temperature gradient whether there is a longitudinal crack or another type of defect.
- three risk factors are defined. These reflect the risk of a longitudinal breakthrough. If any one of these factors exceeds a certain level, countermeasures regarding a longitudinal cracking breakthrough will be initiated at the next detected longitudinal crack. These countermeasures can be a reduction in the casting speed, an influence on the electromagnetic brake, or a targeted change in the target value of the level of the casting mirror.
- the frequency distribution it is calculated how many percent of the longitudinal cracks occur at a certain position of the broad side of the mold.
- the time course is included. If the criterion exceeds a certain limit, countermeasures are taken as soon as a longitudinal crack occurs at the wide side position of the limit violation.
- the criterion of the dynamic temperature distribution in the height direction is determined by the mean value of the dynamic variation of the thermocouples in a thermocouple column characterized.
- the dynamic variation is mapped, for example, by the standard deviation or the variance of a measured value over a certain reference period. If this calculated average dynamic variation per thermocouple column leads to greatly differing values in adjacent columns, countermeasures are initiated. These countermeasures are identical to those of the first criterion. However, the countermeasure becomes active only as soon as a further longitudinal crack occurs near the position of the limit value violation of the second criterion and the limit value of the second criterion is still exceeded when this longitudinal crack occurs.
- the third criterion compares the temperature gradient formed by an upper row of thermocouples minus a lower row of thermocouples across the broad side of the mold. If the temperature gradients in adjacent columns are very different values, countermeasures identical to those of the first criterion are initiated as soon as a longitudinal crack occurs near this particular position and the limit of the third criterion is still exceeded when the longitudinal crack occurs.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008028481.5A DE102008028481B4 (de) | 2008-06-13 | 2008-06-13 | Verfahren zur Vorhersage der Entstehung von Längsrissen beim Stranggießen |
| PCT/DE2009/000617 WO2009149680A1 (de) | 2008-06-13 | 2009-04-30 | Verfahren zur vorhersage der entstehung von längsrissen beim stranggiessen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2291252A1 true EP2291252A1 (de) | 2011-03-09 |
Family
ID=40845710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09761302A Ceased EP2291252A1 (de) | 2008-06-13 | 2009-04-30 | Verfahren zur vorhersage der entstehung von längsrissen beim stranggiessen |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8649986B2 (de) |
| EP (1) | EP2291252A1 (de) |
| JP (1) | JP5579709B2 (de) |
| KR (1) | KR101275035B1 (de) |
| CN (1) | CN102089096A (de) |
| CA (1) | CA2727558C (de) |
| DE (1) | DE102008028481B4 (de) |
| RU (1) | RU2011100814A (de) |
| WO (1) | WO2009149680A1 (de) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5575987B2 (ja) * | 2010-09-29 | 2014-08-20 | ヒュンダイ スチール カンパニー | モールド内凝固シェルのクラック診断装置及びその方法 |
| KR101456453B1 (ko) | 2012-07-24 | 2014-10-31 | 주식회사 포스코 | 주편 품질 예측 장치 및 그 방법 |
| KR20140130012A (ko) * | 2013-04-30 | 2014-11-07 | 현대제철 주식회사 | 슬라브 크랙 진단 방법 |
| JP6119640B2 (ja) * | 2014-02-28 | 2017-04-26 | Jfeスチール株式会社 | 連続鋳造スラブの表面欠陥判定方法及び装置 |
| JP6119807B2 (ja) * | 2014-08-18 | 2017-04-26 | Jfeスチール株式会社 | 連続鋳造スラブの表面欠陥判定方法及び装置、該表面欠陥判定方法を用いた鋼鋳片の製造方法 |
| JP6358199B2 (ja) * | 2015-09-02 | 2018-07-18 | Jfeスチール株式会社 | 連続鋳造スラブの表面欠陥判定方法及び装置、該表面欠陥判定方法を用いた鋼鋳片の製造方法 |
| JP6358215B2 (ja) * | 2015-09-25 | 2018-07-18 | Jfeスチール株式会社 | 連続鋳造鋳片の表面欠陥判定方法及び装置、該表面欠陥判定方法を用いた鋼片の製造方法 |
| DE102017221086A1 (de) | 2017-11-24 | 2019-05-29 | Sms Group Gmbh | Verfahren zur Analyse von Fehlerursachen beim Stranggießen |
| DE102018214390A1 (de) | 2018-08-27 | 2020-02-27 | Sms Group Gmbh | Kokillenbreitseite einer Stranggießkokille mit variabler Messstellendichte zur verbesserten Längsrisserkennung |
| CN111761039A (zh) * | 2019-04-01 | 2020-10-13 | 南京钢铁股份有限公司 | 一种宽板坯纵向裂纹控制工艺 |
| CN110929355B (zh) * | 2019-12-19 | 2021-07-27 | 东北大学 | 一种连铸坯裂纹风险预测的方法及其应用 |
| CN111185583B (zh) * | 2020-02-12 | 2021-11-19 | 首钢集团有限公司 | 一种连铸浸入式水口堵塞的处理方法和处理装置 |
| CN112461893B (zh) * | 2020-11-05 | 2022-11-22 | 宁波晶成机械制造有限公司 | 一种基于热成像原理的无损检测装置及检测方法 |
| CN113510234B (zh) * | 2021-09-14 | 2022-01-07 | 深圳市信润富联数字科技有限公司 | 轮毂低压铸造的质量监控方法、装置及电子设备 |
| CN116441502B (zh) * | 2022-01-07 | 2026-04-10 | 宝山钢铁股份有限公司 | 基于结晶器温度识别连铸板坯纵裂纹缺陷的方法及系统 |
| CN115586215B (zh) * | 2022-11-04 | 2025-08-01 | 东北电力大学 | 一种基于温度特征的连铸坯表面纵裂纹逻辑判断方法 |
| JP7838545B2 (ja) * | 2023-08-31 | 2026-04-01 | Jfeスチール株式会社 | 異常検出方法 |
| CN121889226A (zh) * | 2023-09-27 | 2026-04-17 | 杰富意钢铁株式会社 | 漏钢预测方法及连续铸造机的操作方法 |
| DE102024210612A1 (de) | 2024-11-05 | 2026-05-07 | Sms Group Gmbh | Verfahren zur Vorhersage von Längsrissen bei der Produktion von Stranggießprodukten in einer Stranggießanlage |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5946703B2 (ja) * | 1979-12-28 | 1984-11-14 | 新日本製鐵株式会社 | 鋳型温度計測素子を備えた鋳型による連続鋳造法 |
| JPS6054138B2 (ja) * | 1981-01-08 | 1985-11-28 | 新日本製鐵株式会社 | 連続鋳造鋳型における鋳造鋼の介在物検出方法 |
| DE3423475C2 (de) | 1984-06-26 | 1986-07-17 | Mannesmann AG, 4000 Düsseldorf | Verfahren und Einrichtung zum Stranggießen von flüssigen Metallen, insbesondere von flüssigem Stahl |
| AU562731B2 (en) * | 1985-02-01 | 1987-06-18 | Nippon Steel Corporation | Preventtion of casting defects in continuous casting |
| JPS62192243A (ja) | 1986-02-17 | 1987-08-22 | Nippon Kokan Kk <Nkk> | 連続鋳造における鋳片縦割れの検出方法 |
| JPH01210160A (ja) | 1988-02-16 | 1989-08-23 | Sumitomo Metal Ind Ltd | 連続鋳造における縦割れ予知方法 |
| JP3035688B2 (ja) * | 1993-12-24 | 2000-04-24 | トピー工業株式会社 | 連続鋳造におけるブレークアウト予知システム |
| DE59600581D1 (de) * | 1995-04-03 | 1998-10-22 | Siemens Ag | Einrichtung zur durchbruch-früherkennung beim stranggiessen |
| US5859964A (en) * | 1996-10-25 | 1999-01-12 | Advanced Micro Devices, Inc. | System and method for performing real time data acquisition, process modeling and fault detection of wafer fabrication processes |
| DE19725433C1 (de) * | 1997-06-16 | 1999-01-21 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Durchbruchfrüherkennung beim Stranggießen von Stahl mit einer oszillierenden Kokille |
| JPH1190599A (ja) | 1997-09-18 | 1999-04-06 | Nippon Steel Corp | 連続鋳造の鋳型内異常判定方法 |
| KR100253089B1 (ko) | 1997-10-29 | 2000-05-01 | 윤종용 | 반도체소자 제조용 화학기상증착장치 및 이의 구동방법, 그 공정챔버 세정공정 레시피 최적화방법 |
| EP1021263B1 (de) | 1998-07-21 | 2004-11-03 | Dofasco Inc. | Auf einem multivariablen statistischen modell basierendes system zur darstellung des betriebs einer stranggiessanlage und detektion bevorstehender durchbrüche |
| DE19843033B4 (de) * | 1998-09-19 | 2017-11-09 | Sms Group Gmbh | Durchbrucherkennungsverfahren für eine Stranggießkokille |
| DE10108730C2 (de) * | 2001-02-23 | 2003-01-30 | Thyssenkrupp Stahl Ag | Vorrichtung und ein Verfahren zum Erkennen der Gefahr eines Durchbruchs des Stahlstrangs beim Stranggießen von Stahl |
| JP2003029538A (ja) | 2001-07-11 | 2003-01-31 | Bridgestone Corp | 導電性エンドレスベルトおよびこれを用いた画像形成装置 |
| DE10312923B8 (de) * | 2003-03-22 | 2005-07-14 | Sms Demag Ag | Verfahren zum Bestimmen der Mess-Temperaturen in Stranggießkokillen und Stranggießkokille selbst |
| US6885907B1 (en) * | 2004-05-27 | 2005-04-26 | Dofasco Inc. | Real-time system and method of monitoring transient operations in continuous casting process for breakout prevention |
-
2008
- 2008-06-13 DE DE102008028481.5A patent/DE102008028481B4/de active Active
-
2009
- 2009-04-30 US US12/997,778 patent/US8649986B2/en active Active
- 2009-04-30 JP JP2011512825A patent/JP5579709B2/ja not_active Expired - Fee Related
- 2009-04-30 CA CA2727558A patent/CA2727558C/en not_active Expired - Fee Related
- 2009-04-30 EP EP09761302A patent/EP2291252A1/de not_active Ceased
- 2009-04-30 KR KR1020107029869A patent/KR101275035B1/ko not_active Expired - Fee Related
- 2009-04-30 RU RU2011100814/02A patent/RU2011100814A/ru not_active Application Discontinuation
- 2009-04-30 WO PCT/DE2009/000617 patent/WO2009149680A1/de not_active Ceased
- 2009-04-30 CN CN2009801267638A patent/CN102089096A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009149680A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008028481B4 (de) | 2022-12-08 |
| JP2011522704A (ja) | 2011-08-04 |
| CN102089096A (zh) | 2011-06-08 |
| KR20110017896A (ko) | 2011-02-22 |
| JP5579709B2 (ja) | 2014-08-27 |
| US20110144926A1 (en) | 2011-06-16 |
| CA2727558A1 (en) | 2009-12-17 |
| RU2011100814A (ru) | 2012-07-20 |
| WO2009149680A1 (de) | 2009-12-17 |
| DE102008028481A1 (de) | 2009-12-17 |
| US8649986B2 (en) | 2014-02-11 |
| KR101275035B1 (ko) | 2013-06-17 |
| CA2727558C (en) | 2014-05-27 |
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