EP0702608B1 - Verfahren und vorrichtung zur erzeugung von halbzeug - Google Patents

Verfahren und vorrichtung zur erzeugung von halbzeug Download PDF

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Publication number
EP0702608B1
EP0702608B1 EP94916903A EP94916903A EP0702608B1 EP 0702608 B1 EP0702608 B1 EP 0702608B1 EP 94916903 A EP94916903 A EP 94916903A EP 94916903 A EP94916903 A EP 94916903A EP 0702608 B1 EP0702608 B1 EP 0702608B1
Authority
EP
European Patent Office
Prior art keywords
melt
smoothing
metal
metal profile
thickness
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
Application number
EP94916903A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0702608A1 (de
Inventor
Fritz P. Pleschiutschnigg
Lothar Parschat
Dieter Stalleicken
Tarek El Gammal
Michael Vonderbank
Peter Lorenz Hamacher
Ingo Von Hagen
Ulrich Menne
Uwe Schmidt
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0702608A1 publication Critical patent/EP0702608A1/de
Application granted granted Critical
Publication of EP0702608B1 publication Critical patent/EP0702608B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • 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
    • 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
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5184—Casting and working

Definitions

  • the invention relates to a method for producing semi-finished products in the form of thin metal strands according to the preamble of claim 1 and a device for performing the method.
  • a method and a device for producing thin metal strands are known from EP 0 311 602 B1, from which the preambles of claims 1 and 9 are based.
  • a metal profile cleaned on the surface for example in the form of a band-shaped steel sheet (mother band) with a thickness of 0.1-1.4 mm, is continuously guided through the bottom of a melt container filled with a similar steel melt.
  • a slot-like opening is provided in the bottom of the melt container, which is provided with a sealing device in order to prevent melt from escaping.
  • the temperature of the melt is close to the liquidus temperature T liq .
  • the steel strip is moved through the melt at a constant speed and led upwards out of the melt.
  • the thickness of this layer can be a multiple of the thickness of the original mother tape. It depends in particular on the residence time in the melt (speed of the mother tape), on the melt temperature (temperature difference to the solidus temperature T sol ), on the heat of fusion and the specific heat of the material used and on the mother tape thickness. The process must be carried out in such a way that re-melting of crystals that are already adhering is avoided. Under this condition there is a temperature gradient across the strip thickness. During the movement through the melt pool, the temperature inside the mother tape is the lowest and rises towards the edge. A temperature curve of the same quality is also present in the adhering layer. The liquidus temperature T liq is precisely present in the outermost region of the layer.
  • the adhesive layer initially has a mixed composition of the crystals formed and the molten phase in between (mushy zone). The proportion of molten phases increases towards the outside. After leaving the molten bath, the adhering layer cools down, whereby the temperature gradient that existed up to that point is reversed. The adherent layer solidifies completely.
  • EP 0 311 602 B1 describes a second method variant in which the mother tape is introduced in the reverse manner into the melt bath from above and is pulled off again through the bottom of the melt vessel.
  • the problem of the floor sealing is particularly serious, since the directions of exit of the melt and the strip material are the same and, as a result, not only is there no dynamic sealing effect, but moreover a negative "entrainment effect" which supports the tendency of the melt to exit can also be found.
  • a special sealing device in the form of a pair of sealing rollers is required in the bottom region of the melt vessel. This pair of sealing rollers drastically compresses the "mushy zone” and thus squeezes out large parts of the liquid phase from the "sponge-like" crystallizate structure already formed. This has the consequence that the thickness of the adhesive layer that can be achieved is considerably less than that of the first method variant. For economic reasons alone, such a procedure can hardly be considered for practical application.
  • the object of the invention is to develop a generic method in such a way that the required sheet thickness tolerance of at most 2% can be reliably maintained and to provide an apparatus for carrying out the method.
  • a sheet coil 12 is used as the mother sheet, which is unwound at a certain speed.
  • Reference number 11 designates a strip welding system which connects the end of an already unwound coil to a new coil 12 in order to enable a continuous process sequence.
  • a strip storage system is indicated, which stops the supply of strip during the welding process at a short time Coil change can catch, so that the production operation is not interrupted.
  • a belt cleaning 6 is arranged, in which the surface of the mother belt used is made metallically clean.
  • a pair of transport rollers 2 ensures that the mother tape, which asked for a width / thickness ratio of at least 60, preferably at least 100, is guided into the melt 3 at a constant preselected speed through a corresponding slot-like opening in the bottom of the melt container 1.
  • the mother tape has a very low heat content, since it has room temperature, for example.
  • the melt 3 (eg steel) consists of the same material as the mother tape.
  • a seal, which is arranged on the bottom of the melt container 1, is not shown separately in the figure. While the mother tape is passed through the melt 3 from bottom to top, a layer which grows with increasing dwell time (ie with an approach to the melt pool level) crystallizes, since the mother tape draws heat from the melt 3 in its immediate vicinity, whereby it heats up.
  • the melt 3 is otherwise kept at a temperature of, for example, 10 K above the liquidus temperature.
  • the level of the weld pool level is kept at a constant value by means of a feed, not shown. Taking these and other parameters into account (in particular solidus temperature, heat of fusion, specific heat of the melt material), the belt speed via the transport rollers 2 is preferably set such that the mother belt with the adhering layer when leaving the melt 3 is 3 to 7 times as thick has like the original mother band.
  • a smoothing roller device in the form of a pair of smoothing rollers 4 arranged next to one another is positioned above the melt pool level.
  • the distance of this pair of smoothing rollers 4 from the melt pool level is variable in that the height of the pair of smoothing rollers 4, for example, by a Electromechanical or hydraulic adjustment device, which is indicated by the arrows, is adjustable.
  • the minimum distance of the pair of smoothing rollers 4 from the melt pool level is about 0.5 m, the maximum distance 5 m.
  • the altitude is chosen so that the smoothing stitch takes place at a point where the layer adhering to the mother tape is already relatively solidified on the one hand, but on the other hand still has sufficient proportions of liquid phase in its outer zone which also have a problem-free material flow transversely to the longitudinal direction of the Enable mother band. It is therefore a question of the most favorable quantitative ratio of the solid to the liquid phase.
  • the average temperature in the crystallized layer can be used as a control variable for this.
  • a means a factor in the range of 0.1-0.8, preferably in the range 0.2-0.4.
  • the lower a is, the higher the solidified part.
  • the lower limit is to be regarded as critical in that, in the case of malfunctions, complete or almost complete solidification can easily occur, which would make it impossible to compensate for any larger strip thickness differences.
  • the upper limit of value a is primarily economic. Due to the high proportion of molten phase, a considerable part was squeezed down because of the vertical guidance of the strip material, so that the output would decrease accordingly.
  • a strand surface temperature measuring device (not shown) can be provided in the adjustment range of the pair of smoothing rollers 4.
  • the smoothing roller pair 4 is expediently with an internal fluid cooling (e.g. water cooling).
  • the desired reduction in the thickness of the metal strand as a result of the smoothing stitch should be in a range of 5-15%.
  • the adhesive layer of the mother tape is protected against the entry of atmospheric oxygen by a housing 5 which can be flooded with an inert atmosphere.
  • the housing 5 directly adjoins the melt container 1 and also envelops the pair of smoothing rollers 4.
  • at least parts of the walls of the housing 5 are provided with thermal insulation.
  • the walls of the housing 5 it is expedient to design the walls of the housing 5 as cooling walls, in particular as walls that are fluid-cooled from the inside (for example water cooling).
  • Controlling the coolant temperature then allows controlled cooling of the semifinished product produced in the cooling zone 8 downstream of the smoothing roller device 4, which leads to particularly favorable material properties.
  • the band-shaped material is guided in loops in a central section of the cooling zone 8 by corresponding deflection rollers, so that a correspondingly longer dwell time occurs in this zone.
  • the metal strand produced After the metal strand produced has cooled sufficiently, it leaves the housing 5 with its inert atmosphere and can be oiled, for example, by an electrostatic oiling device 9 and protected against corrosion.
  • the material is then continuously wound into a coil 13. After reaching a certain weight, the coil 13 is cut off from the rest of the strand by means of a pair of scissors 10 and is further processed into a warm or Cold rolling mill transported away.
  • the melt showed an analysis comparable to the steel strip.
  • the melt vessel 1 became liquid steel continuously from a distributor, not shown fed.
  • the height of the molten bath 3 and the speed of the steel strip are the control variables for setting the desired contact tent between the steel strip and the molten bath 3, which should be about 2 seconds in the present case. Since the belt speed was 1 m / s, a melt pool height of 2 m was therefore maintained at all times. In the steel melt 3, which had a temperature of approx. 1512 ° C, a crystallization of a total thickness of approximately 2.5 mm occurred during the passage of the steel strip, so that the total thickness of the steel strip as it emerged from the steel melt 3 was approximately 3 mm was.
  • the smoothing unit 4 was therefore adjusted in its vertical position so that this temperature was given on the entry side into the smoothing unit under the present cooling conditions.
  • the smoothing stitch carried out resulted in a completely void-free steel strip with an optimally welded layering and a uniform thickness of approx. 2.5 mm.
  • the existing deviation of the actual strip thickness from the target strip thickness was still only 1.6%, which is significantly below the maximum permissible value of 2% for hot strip, which is to be processed cold.
  • the steel strip After exiting the smoothing mill 4, the steel strip, which was further protected from oxidation by an argon atmosphere, was checked in the water-cooled dome of the housing 5 Subsequent cooling and after passing through a likewise cooled and filled with argon buffer space (cooling zone 8) fed to a winding station 13. The steel strip was then rolled out to a thickness of again 0.5 mm in a cold rolling mill, not shown.
  • the cold strip produced in this way had excellent mechanical-technological properties and met all the quality requirements. About 20% of the current production volume was returned to the process as input material.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Fish Paste Products (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Multi-Process Working Machines And Systems (AREA)
EP94916903A 1993-06-08 1994-06-03 Verfahren und vorrichtung zur erzeugung von halbzeug Expired - Lifetime EP0702608B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4319569A DE4319569C1 (de) 1993-06-08 1993-06-08 Verfahren und Vorrichtung zur Erzeugung von Halbzeug
DE4319569 1993-06-08
PCT/DE1994/000656 WO1994029048A1 (de) 1993-06-08 1994-06-03 Verfahren und vorrichtung zur erzeugung von halbzeug

Publications (2)

Publication Number Publication Date
EP0702608A1 EP0702608A1 (de) 1996-03-27
EP0702608B1 true EP0702608B1 (de) 1996-12-11

Family

ID=6490242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916903A Expired - Lifetime EP0702608B1 (de) 1993-06-08 1994-06-03 Verfahren und vorrichtung zur erzeugung von halbzeug

Country Status (11)

Country Link
US (2) US5722151A (cs)
EP (1) EP0702608B1 (cs)
JP (1) JP3199382B2 (cs)
KR (1) KR960702778A (cs)
CN (1) CN1043317C (cs)
AT (1) ATE146106T1 (cs)
CZ (1) CZ282978B6 (cs)
DE (2) DE4319569C1 (cs)
ES (1) ES2095769T3 (cs)
RU (1) RU2126733C1 (cs)
WO (1) WO1994029048A1 (cs)

Families Citing this family (8)

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DE19509681C1 (de) * 1995-03-07 1996-05-02 Mannesmann Ag Verfahren und Anlage zur kontinuierlichen Erzeugung bandförmiger Bleche
DE19638906C1 (de) * 1996-09-23 1998-01-02 Schloemann Siemag Ag Verfahren und Vorrichtung zur Erzeugung von beschichteten Strängen aus Metall, insbesondere von Bändern aus Stahl
DE19731124C1 (de) * 1997-07-19 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zur Erzeugung von beschichtetem Warm- und Kaltband
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
DE10243457B3 (de) * 2002-09-19 2004-04-29 Sms Demag Ag Verfahren zum Herstellen von Flachstahl-Produkten mit hoher Magnetisierungsfähigkeit
USD854386S1 (en) 2016-09-29 2019-07-23 Mariplast North America, Inc. Vegetative sheath
JP6477667B2 (ja) * 2016-11-08 2019-03-06 トヨタ自動車株式会社 成形体製造方法、及び、成形体製造装置
US11384419B2 (en) * 2019-08-30 2022-07-12 Micromaierials Llc Apparatus and methods for depositing molten metal onto a foil substrate

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DE4208578A1 (de) * 1992-03-13 1993-09-16 Mannesmann Ag Verfahren zum beschichten der oberflaeche von strangfoermigem gut

Also Published As

Publication number Publication date
CZ325595A3 (en) 1996-04-17
CZ282978B6 (cs) 1997-12-17
US5722151A (en) 1998-03-03
DE4319569C1 (de) 1994-06-16
ATE146106T1 (de) 1996-12-15
CN1124936A (zh) 1996-06-19
EP0702608A1 (de) 1996-03-27
JPH08510962A (ja) 1996-11-19
ES2095769T3 (es) 1997-02-16
CN1043317C (zh) 1999-05-12
DE59401278D1 (de) 1997-01-23
WO1994029048A1 (de) 1994-12-22
US5881441A (en) 1999-03-16
JP3199382B2 (ja) 2001-08-20
RU2126733C1 (ru) 1999-02-27
KR960702778A (ko) 1996-05-23

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