EP0832990B1 - Verfahren zur Erzeugung von beschichteten Strängen aus Metall, inbesondere von Bändern aus Stahl - Google Patents
Verfahren zur Erzeugung von beschichteten Strängen aus Metall, inbesondere von Bändern aus StahlInfo
- Publication number
- EP0832990B1 EP0832990B1 EP97116322A EP97116322A EP0832990B1 EP 0832990 B1 EP0832990 B1 EP 0832990B1 EP 97116322 A EP97116322 A EP 97116322A EP 97116322 A EP97116322 A EP 97116322A EP 0832990 B1 EP0832990 B1 EP 0832990B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- melt
- crystallised
- metal
- temperature
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000009499 grossing Methods 0.000 claims abstract description 51
- 238000005266 casting Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims description 32
- 238000005096 rolling process Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 238000007711 solidification Methods 0.000 description 14
- 230000008023 solidification Effects 0.000 description 14
- 238000002425 crystallisation Methods 0.000 description 12
- 230000008025 crystallization Effects 0.000 description 12
- 239000012071 phase Substances 0.000 description 10
- 239000013078 crystal Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000002131 composite material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000005499 meniscus Effects 0.000 description 5
- 235000011837 pasties Nutrition 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002631 hypothermal effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010792 warming Methods 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
- B22D11/008—Continuous casting of metals, i.e. casting in indefinite lengths of clad ingots, i.e. the molten metal being cast against a continuous strip forming part of the cast product
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
- C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
Definitions
- the invention relates to a method for producing coated Strands of metal, in particular of steel strips, in which a strand of metal through the bottom of a vessel filled with melt same or different composition as the metal strand, is performed, the residence time of the metal strand in Dependence on the melt pool height, the casting speed, the Metal strand thickness and the preheating temperature of the metal strand so is chosen that the deposited melt on the metal strand desired thickness of several times the initial thickness of the metal strand assumes and the metal strand with crystallized layer experiences a smooth stitch after leaving the weld pool.
- Method and device deals with the generation of coated metal strands, preferably strips of a Steel grade or different steel grades, such as Mono material or composite material and here in particular also Composite material made of carbon steel, thinly coated with stainless steel.
- DE 195 09 691 C1 describes an inversion casting vessel and a method known for producing thin metal strands, in particular steel, where a metal band through the bottom of a filled with melt Container passed and after crystallization of the melt is subtracted.
- Guide rollers guide through a channel the metal strip is melted into the container. After on If a layer of melt has crystallized, the tape becomes conveyed above the vessel by smoothing rollers in which the tape is smoothed with the crystallized layer close to final dimensions.
- DE 195 09 681 C1 is a further inversion casting device and a process for the continuous production of sheet-like sheets, especially known from steel, in which a mother tape by a Melt bath of a metal is passed through to achieve a itself in the form of crystals and melt on the surface of the Mother tape depositing coating. After the mother tape that Has left the melt pool, there is expedient an immediate Smoothing the crystallized coating by means of a pair of smoothing rollers, which is located above the weld pool.
- the object of the invention is now a method to find, thereby smoothing the strip with a sheet thickness tolerance of a maximum of 2% without crack formation both in the surface and is also ensured inside the belt.
- the main features for the production of error-free, flat-coated Belts for example, with a width / thickness ratio> 60 and one Total thickness of maximum 12 mm, preferably 2 to 6 mm, from one Material or from composite materials of different metal grades such as.
- Carbon steel as a single material or carbon steel with a stainless steel coating of at least 5% of the total strip thickness as a composite material and a thickness deviation of maximum 2% between the edge (40 mm from the edge) and the middle of the volume include marked by :
- a surface temperature of the crystallized layer on entry of the belt into the pair of smoothing rollers which is less than the solidus temperature of the weld pool, so that at least the surface the crystallized layer has solidified.
- FIGS 1 and 2 give the overall view of the method and Device for smoothing coated strands, preferably tapes made of steel (1) by means of a pair of smoothing rollers (2) again.
- the Mother tape (1.1) is filled in the crystallizer (3) with melt (3.3), which is introduced via a melt feed (3.1), through the nozzle of a floor inlet device (3.2) with a pouring and rolling speed (7.1) from 0.05 to 10 m / s by means of a Drive roller pair (1.5) conveyed below the crystallizer.
- the mother tape (1.1) starts above of the steel meniscus (3.5) at the nozzle outlet (3.2) with the crystallization (3.6) of the melt in point (3.6.1) and withdraws the Melt (3.3) superheat and crystallization energy under simultaneous warming.
- This energy flow (4) from the melt takes place in the mother band when passing through the mother band the weld pool (3.3) between the meniscus (3.5) and the bath surface (3.4) over the melt pool height (3.3.1) instead.
- the strip (1) coated in this way is at the outlet (5) from the bath (3.4) "doughy” on the surface (two phases: melt and crystal) and has a surface roughness (1.3) of greater than 2%, the the flatness criteria of a strip with a width / thickness ratio greater than 60 does not do it justice.
- the energy flow (6) turns in comparison the heat flow (4) in the melt (3.3) and runs from the inside (Band center) outwards into the walls (6.1) with heat-controlled Continuity.
- This controlled heat flow can be through wall elements (6.2) in accordance with the temperature control of the belt (1) necessary zones in the casting and rolling direction (7) can be divided.
- the crystallization (3.6) in the bath (3.3) has on its surface (4.1) a temperature (8) T-x that is greater than the solidus temperature and less than the liquidus temperature (T-li> T-x> T-sol) is and has a two-phase state consisting of Melt and crystal, on. This crystallization takes place in her Temperature from the surface perpendicular to the mother tape (1.1) steadily from. Functional to the surface profile (4.1) of the crystallization (3.6) runs the liquidus isotherm (10) in the melt pool to the bathroom surface (3.4).
- To control a desired temperature control of the coated Belt (1) are the position (2.4) of the pair of smoothing rollers (2), the energy flow (6) into the walls with heat-controlled passage (6.1 and 6.2) and the casting and rolling speed (7.1) in To regulate the sense of the invention so that the surface temperature of the coated tape (1) before entering the pair of smoothing rollers (2) is below the solidus temperature and thus that coated tape at least solidified in its surface is.
- FIG. 3 shows the area of the pair of smoothing rollers (2) somewhat more in detail.
- the coated tape (1) with its crystallization (3.6) runs into the roll gap (2.1.1) with a surface temperature, T-2.1.1 smaller than T-Solidus on (T-2.1.1 ⁇ T-sol) and occurs with a controlled lowered temperature, T-2.1.2 smaller T-2.1.1 (T-2.1.2 ⁇ T-2.1.1 ⁇ T-sol) from the roll gap (2.1) at its outlet (2.1.2).
- the temperature loss in the roll gap should be checked and kept small. This can be done according to the invention by means of an appropriately controlled heat transfer Smoothing roller pair (2) with internal cooling (2.5) and heat-controlling layer (2.6) or layers can be achieved.
- the entire room (11) above the bath surface (3.4) is in its temperature and atmosphere (nitrogen and / or argon) checked so that the conditions described above are ensured are avoided as well as an oxidation of the belt surface becomes.
- the tape coated in this way is directly or indirectly another Rolling mill (12) and rolling process for producing finished hot strip and / or cold strip both as a mono material and as a composite material supplied with or without upstream pickling.
- control and / or regulate the temperature field in the coated strip (1) and on the strip surface (1.3) between the melt pool surface (3.4) and the exit of the coated and smoothed belt (1.4.1) from the pair of smoothing rollers (2) are measuring devices for temperature detection (2.8) on the inside the heat-controlled wall elements (6.2) attached.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
- Ropes Or Cables (AREA)
Description
- Figur 1
- eine Gesamtansicht des Verfahrens und seiner Vorrichtung zur Glättung von beschichteten Strängen aus Metall vorzugsweise von Bändern aus Stahl.
- Figur 2
- ein Temperaturfeld des Stranges zwischen dem Bandeintritt in den Kristallisator und dem Glättrollenpaar während des Gießens,
- Figur 3
- ein beschichtetes Band zwischen der Schmelzbadoberfläche im Kristallisator und dem Glättrollenpaar, Detail aus Fig. 1.
4.1 Oberfläche und Profil der Ankristallisation im Schmelzbad
5.1 Enddicke der ankristallisierten Schicht
7.1 Gieß- und Walzgeschwindigkeit
Claims (11)
- Verfahren zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern (1) aus Stahl, bei dem ein Metallstrang (1.1) durch den Boden eines Gefäßes (3), gefüllt mit Schmelze (3.3) gleicher oder unterschiedlicher Zusammensetzung wie der Metallstrang (1.1), geführt wird, wobei die Verweilzeit des Metallstranges (1.1) in Abhängigkeit von der Schmelzbadhöhe (3.3.1), der Gießgeschwindigkeit, der Metallstrangdicke und der Vorwärmtemperatur des Metallstranges so gewählt wird, daß die abgelagerte Schmelze auf dem Metallstrang eine gewünschte Dicke von dem Mehrfachen der Ausgangsdicke des Metallstranges annimmt und der Metallstrang (1.1) mit ankristallisierter Schicht (3.6) nach Austritt aus dem Schmelzebad (3.3) einen Glättstich (2) erfährt,
dadurch gekennzeichnet,
daß der Glättstich dann vorgenommen wird, wenn die Oberflächentemperatur des ankristallisierten Stranges (3.6) kleiner als die Solidus-Temperatur des Schmelzbades (3.3) ist und damit zumindest die Oberfläche (1.3) der ankristallisierten Schicht (3.6) erstarrt ist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Erstarrung der ankristallisierten Schicht (3.6) nach dem Durchtritt des Stranges (1.1) durch das Glättrollenpaar (2) erfolgt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Erstarrung der ankristallisierten Schicht (3.6) des Stranges (1.1) im Walzspalt (2.1) des Glättrollenpaares (2) erfolgt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Erstarrung der ankristallisierten Schicht (3.6) vor dem Eintritt des Stranges (1.1) in das Glättrollenpaar (2) erfolgt. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Erstarrung der ankristallisierten Schicht (3.6) des Stranges (1.1) vom Energiestrom (6) oberhalb des Schmelzbades in die Wände des Gefäßes (3) mit wärmekontrolliertem Durchgang bestimmt wird. - Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die Erstarrung der ankristallisierten Schicht (3.6) des Stranges (1.1) vom Energiestrom (2.7) über den Walzspalt (2.1) in das innengekühlte Glättrollenpaar (2.5) bestimmt wird. - Verfahren nach mindestens einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß der aufkristallisierte und geglättete Strang (1.4) einem in Atmosphäre und/oder Temperatur kontrollierten Walzprozeß zugeführt wird. - Verfahren nach mindestens einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß der aufkristallisierte und geglättete Strang (1.4) oxidationsfrei und/oder temperaturkontrolliert abgekühlt wird. - Verfahren nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß während der Erzeugung des beschichteten Bandes eine oxidationsfreie Atmosphäre oberhalb des Schmelzbades eingestellt wird. - Verfahren nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Metallstrang (1.1) (Mutterband) in das Schmelzegefäß (3) mit einer Gieß- und Walzgeschwindigkeit (7.1) von 0,05 bis 10 m/sec eingefördert wird. - Verfahren nach mindestens einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Metallstrang (1.1) mit einer Temperatur von 20 bis 800 °C kontinuierlich und senkrecht durch den Boden in das Schmelzegefäß (3) hineingeführt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19638906A DE19638906C1 (de) | 1996-09-23 | 1996-09-23 | Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl |
DE19638906 | 1996-09-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0832990A2 EP0832990A2 (de) | 1998-04-01 |
EP0832990A3 EP0832990A3 (de) | 1999-02-03 |
EP0832990B1 true EP0832990B1 (de) | 2001-04-11 |
Family
ID=7806558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97116322A Expired - Lifetime EP0832990B1 (de) | 1996-09-23 | 1997-09-19 | Verfahren zur Erzeugung von beschichteten Strängen aus Metall, inbesondere von Bändern aus Stahl |
Country Status (4)
Country | Link |
---|---|
US (1) | US6161608A (de) |
EP (1) | EP0832990B1 (de) |
AT (1) | ATE200519T1 (de) |
DE (2) | DE19638906C1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902066A1 (de) * | 1999-01-20 | 2000-08-03 | Sms Demag Ag | Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl |
MY134564A (en) * | 2000-11-08 | 2007-12-31 | Bhp Steel Jla Pty Ltd | Cold-formable metal-coated strip |
FI116453B (fi) * | 2000-12-20 | 2005-11-30 | Outokumpu Oy | Menetelmä kerrosmetallituoteaihion valmistamiseksi ja kerrosmetallituoteaihio |
DE10201175B4 (de) * | 2001-02-27 | 2005-07-14 | Sms Demag Ag | Verfahren und Vorrichtung zum Beschichten eines Bandes aus Stahl, insbesondere aus Kohlenstoffstahl, mit ankristallisierbaren Anteilen aus Stahlschmelze |
US20030029902A1 (en) * | 2001-07-02 | 2003-02-13 | Northeastern University | Reinforced structural elements incorporating fiber-reinforced metal matrix composite wires and methods of producing the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3235960A (en) * | 1961-03-24 | 1966-02-22 | Gen Electric | Process for the continuous formation of intermediates |
US3709722A (en) * | 1970-04-06 | 1973-01-09 | Kennecott Copper Corp | Process for accreting molten copper on a moving core member |
JPH01201453A (ja) * | 1988-02-05 | 1989-08-14 | Fujikura Ltd | 無酸素銅被覆ジルコニウム銅線の製造方法 |
DE4319569C1 (de) * | 1993-06-08 | 1994-06-16 | Mannesmann Ag | Verfahren und Vorrichtung zur Erzeugung von Halbzeug |
DE19509681C1 (de) * | 1995-03-07 | 1996-05-02 | Mannesmann Ag | Verfahren und Anlage zur kontinuierlichen Erzeugung bandförmiger Bleche |
DE19509691C1 (de) * | 1995-03-08 | 1996-05-09 | Mannesmann Ag | Bodendurchführung eines Inversionsgießgefäßes |
-
1996
- 1996-09-23 DE DE19638906A patent/DE19638906C1/de not_active Expired - Fee Related
-
1997
- 1997-09-19 AT AT97116322T patent/ATE200519T1/de not_active IP Right Cessation
- 1997-09-19 DE DE59703345T patent/DE59703345D1/de not_active Expired - Fee Related
- 1997-09-19 EP EP97116322A patent/EP0832990B1/de not_active Expired - Lifetime
- 1997-09-22 US US08/934,952 patent/US6161608A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0832990A2 (de) | 1998-04-01 |
US6161608A (en) | 2000-12-19 |
ATE200519T1 (de) | 2001-04-15 |
DE59703345D1 (de) | 2001-05-17 |
DE19638906C1 (de) | 1998-01-02 |
EP0832990A3 (de) | 1999-02-03 |
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