EP0579702B1 - Procede de controle dynamique de la vitesse d'extraction lors d'un cycle de cicatrisation apres collage, dans un processus de coulee continue d'acier - Google Patents
Procede de controle dynamique de la vitesse d'extraction lors d'un cycle de cicatrisation apres collage, dans un processus de coulee continue d'acier Download PDFInfo
- Publication number
- EP0579702B1 EP0579702B1 EP92908866A EP92908866A EP0579702B1 EP 0579702 B1 EP0579702 B1 EP 0579702B1 EP 92908866 A EP92908866 A EP 92908866A EP 92908866 A EP92908866 A EP 92908866A EP 0579702 B1 EP0579702 B1 EP 0579702B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- steel
- healing
- ferritic
- length
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 16
- 238000005266 casting Methods 0.000 title description 3
- 230000035876 healing Effects 0.000 claims abstract description 25
- 230000001133 acceleration Effects 0.000 claims abstract description 11
- 125000004122 cyclic group Chemical group 0.000 claims abstract 2
- 238000001514 detection method Methods 0.000 claims abstract 2
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 238000009749 continuous casting Methods 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000007711 solidification Methods 0.000 description 10
- 230000008023 solidification Effects 0.000 description 10
- 238000000605 extraction Methods 0.000 description 6
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- FLDSMVTWEZKONL-AWEZNQCLSA-N 5,5-dimethyl-N-[(3S)-5-methyl-4-oxo-2,3-dihydro-1,5-benzoxazepin-3-yl]-1,4,7,8-tetrahydrooxepino[4,5-c]pyrazole-3-carboxamide Chemical compound CC1(CC2=C(NN=C2C(=O)N[C@@H]2C(N(C3=C(OC2)C=CC=C3)C)=O)CCO1)C FLDSMVTWEZKONL-AWEZNQCLSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000037390 scarring Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Definitions
- the invention relates to a method of dynamic control of the speed of extraction in a process of continuous casting of a steel of the type according to which, when detecting a bonding of skin in ingot molds, the speed of extraction of a cycle composed of a deceleration ramp from cruising speed to a reduced speed, a healing plateau and an acceleration ramp from reduced speed to cruising speed.
- a process is known to Denanderesse.
- the object of the invention is to replace the management of this cycle by a dynamic control adapted to the behavior of the steel and minimizing the slowdown period to the minimum time to heal the collage.
- the invention achieves its object in that the ferritic potential of the cast steel is determined and in that at least the slope of the acceleration and deceleration ramps is determined as a function of this ferritic potential.
- the invention is indeed based on the discovery based both on scientific considerations and on real experiences, according to which the ferritic potential, which will be defined later, can be considered as the determining factor in the speed regulation d during the healing cycle.
- the reduced speed in the event of bonding is of the order of 0.2 to 1 m / minute to heal the bonding.
- the graph in FIG. 1 represents, schematically, the extraction speed V (in m / min) as a function of time t (in min), around and during the healing cycle.
- the extraction speed Before and after this cycle, the extraction speed has a cruising value V c .
- PF 2.5 (0.5 -% Cp)
- % Cp represents a carbon equivalent to the peritectic reaction, that is to say a C content corrected to take account of the influence of the other alloying elements.
- % Cp % C + 0.02% Mn + 0.04% Ni-0.1% Si -0.04% Cr-0.1% Mo.
- the value 1 of the ferritic potential signifies a completely ferritic solidification.
- the negative values of the ferritic potential indicate a totally austenitic solidification.
- the acceleration A expressed in m / min2 as a function of the ferritic potential, is an increasing function from a value slightly less than 0.1 m / min2 for very positive potentials up to a maximum of about 0.7 m / min2 for a potential close to 1, then decreasing from this maximum to a value slightly less than 0.2 m / min2 for negative potentials.
- the durations t a (which theoretically result from the calculation (V vs -V r )/AT) are advantageously arranged to also take into account other alloying elements which promote bonding by affecting the viscosity of the slag in the mold.
- the multiplication factors to remember (corresponding to similar division factors for A) are: Element,% content equal to or greater than 0.05 0.1 0.5 S 1 2 3 A1 1 2 3 Ti 1.5 3 6 Zr and / or REM 2 4 10
- the preferred durations t d for deceleration are of the order of 0.5 to 30 s.
- T L and T S are the liquidus and solidus temperatures .
- the upper graph of FIG. 2 shows that the waiting time t r is an increasing function of the solidification interval, from values of approximately 15 s to values of approximately 6 min, the preferred durations being of the order of 30 to 300 s.
- TABLE I Steel grade AT B VS D E F Analysis in% VS 0.05 0.02 0.005 1.0 0.12 0.35 Yes 0.5 3.0 0.20 Mn 1.5 0.30 0.50 Cr 18.0 1.5 Or 10.5 Ti 0.05 Al 0.03 Characteristic values : PF 0.53 1.95 1.24 -1.06 0.94 0.34 T L (° C) 1460 1506 1537 1465 1526 1502 T S (° C) 1408 1499 1535 1344 1504 1458 T L -T S (K) 52 7 2 121 22 44 Dynamic control criteria *): D ⁇ m / min2) -44 -12 -20 -68 -30 -52 t d (s) 1.4 5.0 3.0 0.9 2.0 1.2 t r (min) 0.7 0.3 0.3 3.6 0.3 0.5 A (
- FIG. 3 shows the typical healing cycle of a bonding for the grade of mild steel X according to the invention and according to a conventional method X ′, as well as for a grade with a high silica content for sheets. electrical (steel B) and for a hard steel grade, type 100 C 6 (steel D).
- electrical steel B
- hard steel grade type 100 C 6
- the cycle X 'requires a total t a + t r of 7 min, to which is added 0.9 s of deceleration. This results in a loss of productivity as well as a deterioration of the surface quality.
- shade D requires a much longer cycle; the conventional method has insufficient security to effectively heal the bonding.
- the reduced speed V r is advantageously between 0.2 and 1 m / min for most practical cases. Nevertheless, its determination preferably obeys the following criteria: the reduced speed of the healing cycle is substantially equal to the greater of the two values obtained by taking 70% of the cruising speed and a speed obtained relative to the useful length of the ingot mold at the length t r of the healing plate.
- a speed V r substantially equal to 70% of V c is chosen if this is compatible with the possibility of scarring over the useful length L of the mold which extends between the second mold height and the outlet of the ingot mold.
- an ingot mold with a total height of 0.90 meters, the second thermocouple height of which is 0.3 meters has a useful length of 0.6 m.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
- Control Of Heat Treatment Processes (AREA)
- Coating With Molten Metal (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9104356A FR2675062B1 (fr) | 1991-04-10 | 1991-04-10 | Procede de controle dynamique de la vitesse d'extraction lors d'un cycle de cicatrisation apres collage, dans un processus de coulee continue d'acier. |
| FR9104356 | 1991-04-10 | ||
| PCT/FR1992/000286 WO1992018273A1 (fr) | 1991-04-10 | 1992-03-30 | Procede de controle dynamique de la vitesse d'extraction lors d'un cycle de cicatrisation apres collage, dans un processus de coulee continue d'acier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0579702A1 EP0579702A1 (fr) | 1994-01-26 |
| EP0579702B1 true EP0579702B1 (fr) | 1994-12-07 |
Family
ID=9411670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92908866A Expired - Lifetime EP0579702B1 (fr) | 1991-04-10 | 1992-03-30 | Procede de controle dynamique de la vitesse d'extraction lors d'un cycle de cicatrisation apres collage, dans un processus de coulee continue d'acier |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5449034A (zh) |
| EP (1) | EP0579702B1 (zh) |
| KR (1) | KR100230888B1 (zh) |
| CN (1) | CN1046875C (zh) |
| AT (1) | ATE115019T1 (zh) |
| AU (1) | AU651883B2 (zh) |
| CA (1) | CA2108127A1 (zh) |
| DE (1) | DE69200848T2 (zh) |
| ES (1) | ES2068032T3 (zh) |
| FI (1) | FI97782C (zh) |
| FR (1) | FR2675062B1 (zh) |
| IE (1) | IE921133A1 (zh) |
| MX (1) | MX9201617A (zh) |
| PT (1) | PT100355A (zh) |
| TW (1) | TW206171B (zh) |
| WO (1) | WO1992018273A1 (zh) |
| ZA (1) | ZA922532B (zh) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6003840B2 (ja) * | 2013-07-30 | 2016-10-05 | トヨタ自動車株式会社 | 引上式連続鋳造方法 |
| CN112191837B (zh) * | 2020-10-12 | 2022-06-17 | 马鞍山钢铁股份有限公司 | 一种板坯连铸硅钢快换中包工艺控制方法 |
| CN112362497B (zh) * | 2020-10-27 | 2024-05-28 | 合肥工业大学 | 一种电磁感应加热沥青路面梯度自愈合率评级和控制方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0111000A4 (en) * | 1982-05-31 | 1984-09-19 | Nippon Kokan Kk | METHOD FOR FINDING DAMAGES ON THE CONTINUOUS CASTING DISH WHEN DRAWN FROM A HORIZONTAL CONTINUOUS CASTING MACHINE. |
| DE3307176A1 (de) * | 1983-03-01 | 1984-09-06 | Naučno-proizvodstvennoe ob"edinenie Tulačermet, Tula | Steuerverfahren fuer das ausziehen eines giessstranges aus einer kokille bei horizontalem stranggiessen und einrichtung zur durchfuehrung des verfahrens |
| AU562731B2 (en) * | 1985-02-01 | 1987-06-18 | Nippon Steel Corporation | Preventtion of casting defects in continuous casting |
| DE3528328A1 (de) * | 1985-08-07 | 1987-02-19 | Mannesmann Ag | Verfahren und auszieheinrichtung zum horizontalstranggiessen von metall, insbesondere von stahl |
| US4762164A (en) * | 1987-08-20 | 1988-08-09 | Usx Corporation | Mold friction monitoring for breakout protection |
| US5020585A (en) * | 1989-03-20 | 1991-06-04 | Inland Steel Company | Break-out detection in continuous casting |
| JP2900594B2 (ja) * | 1990-11-21 | 1999-06-02 | 日本鋼管株式会社 | 水平連続鋳造の引抜き制御方法 |
-
1991
- 1991-04-10 FR FR9104356A patent/FR2675062B1/fr not_active Expired - Fee Related
-
1992
- 1992-03-30 WO PCT/FR1992/000286 patent/WO1992018273A1/fr active IP Right Grant
- 1992-03-30 KR KR1019930702839A patent/KR100230888B1/ko not_active Expired - Fee Related
- 1992-03-30 ES ES92908866T patent/ES2068032T3/es not_active Expired - Lifetime
- 1992-03-30 DE DE69200848T patent/DE69200848T2/de not_active Expired - Fee Related
- 1992-03-30 EP EP92908866A patent/EP0579702B1/fr not_active Expired - Lifetime
- 1992-03-30 CA CA002108127A patent/CA2108127A1/en not_active Abandoned
- 1992-03-30 AU AU16464/92A patent/AU651883B2/en not_active Ceased
- 1992-03-30 AT AT92908866T patent/ATE115019T1/de not_active IP Right Cessation
- 1992-04-08 PT PT100355A patent/PT100355A/pt not_active Application Discontinuation
- 1992-04-08 MX MX9201617A patent/MX9201617A/es unknown
- 1992-04-08 ZA ZA922532A patent/ZA922532B/xx unknown
- 1992-04-09 IE IE113392A patent/IE921133A1/en unknown
- 1992-04-09 CN CN92102615A patent/CN1046875C/zh not_active Expired - Fee Related
- 1992-04-29 TW TW081103352A patent/TW206171B/zh active
-
1993
- 1993-10-06 FI FI934393A patent/FI97782C/fi active
- 1993-12-29 US US08/129,193 patent/US5449034A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| LIGHT METALS, A PUBLICATION OF THE METALLURGICAL SOCIETY OF AIME 1985, pages 1285-1299; S.J. BERCOVICI: 'Optimisation of 3C roll caster by automatic control' see page 1293, lines 30-45 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FI934393L (fi) | 1993-10-06 |
| EP0579702A1 (fr) | 1994-01-26 |
| AU651883B2 (en) | 1994-08-04 |
| DE69200848T2 (de) | 1995-05-04 |
| FI934393A0 (fi) | 1993-10-06 |
| FI97782B (fi) | 1996-11-15 |
| KR100230888B1 (ko) | 1999-11-15 |
| FI97782C (fi) | 1997-02-25 |
| CN1046875C (zh) | 1999-12-01 |
| WO1992018273A1 (fr) | 1992-10-29 |
| CA2108127A1 (en) | 1992-10-11 |
| ZA922532B (en) | 1992-12-30 |
| ES2068032T3 (es) | 1995-04-01 |
| DE69200848D1 (de) | 1995-01-19 |
| MX9201617A (es) | 1992-10-01 |
| CN1065613A (zh) | 1992-10-28 |
| FR2675062B1 (fr) | 1993-07-16 |
| US5449034A (en) | 1995-09-12 |
| ATE115019T1 (de) | 1994-12-15 |
| AU1646492A (en) | 1992-11-17 |
| PT100355A (pt) | 1994-04-29 |
| FR2675062A1 (fr) | 1992-10-16 |
| TW206171B (zh) | 1993-05-21 |
| IE921133A1 (en) | 1992-10-21 |
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