EP1068913A1 - Lingotière de coulée continue - Google Patents

Lingotière de coulée continue Download PDF

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Publication number
EP1068913A1
EP1068913A1 EP00114706A EP00114706A EP1068913A1 EP 1068913 A1 EP1068913 A1 EP 1068913A1 EP 00114706 A EP00114706 A EP 00114706A EP 00114706 A EP00114706 A EP 00114706A EP 1068913 A1 EP1068913 A1 EP 1068913A1
Authority
EP
European Patent Office
Prior art keywords
continuous casting
coating
casting mold
copper
mold
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.)
Withdrawn
Application number
EP00114706A
Other languages
German (de)
English (en)
Inventor
Horst Grothe
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1068913A1 publication Critical patent/EP1068913A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059—Mould materials or platings

Definitions

  • the invention relates to a continuous casting mold which can be assembled from copper plates for casting pipes, blocks, slabs or the like, in particular for Continuous casting of thin slabs of steel, the plates in particular in the meniscus area with a coating or with the use of a special material containing different metals, metal oxides or ceramic material are trained.
  • Continuous casting molds determine the format, for example, of an emerging one Slabs of liquid steel, and ensure the initial through intensive heat dissipation Formation of a strand shell.
  • the contact area of the liquid steel with the copper there is an extremely strong heat transfer with Increase in the copper wall temperature, sometimes up to the permissible strength limit of copper.
  • Defective copper plates usually lead to errors during the casting process in training or on the surface of the strand.
  • Document DE 0 492 264 B1 discloses a mold for the continuous casting of Thin slabs, the broad side walls of which have a pure copper layer from 1 to 8 mm as a working coating, or with a pure copper layer of 0.2 to 0.4 mm as the basis for a wear-resistant working coating are provided.
  • This working coating can essentially consist of nickel or consist of chrome or molybdenum, or also of metal ceramic.
  • DE-OS 1 508 975 discloses a metal casting mold, in particular a continuous mold for the continuous casting of steel which has cavities Body consists of a metal of high strength, into the cavities of which this filling other metal with high thermal conductivity is introduced.
  • the Metal introduced into the body can have a much lower boiling point than the metal used for the body and have a wide temperature range between melting and boiling point.
  • the one made of high-strength metal existing body is either skeletal or has a porous Structure on.
  • the body can be made of tungsten, molybdenum or a similar metal exist in the cavities silver or copper is introduced.
  • Farther can be aluminum, titanium, beryllium or in the cavities Silicon be introduced.
  • DE 40 39 230 A1 describes a method for coating one in one Continuous caster used continuous mold with surface hard material, especially for coating a mold for a slab caster, whose construction material consists of copper or a copper alloy.
  • the the molten metal inner surfaces of the mold are from the pouring area up to the exit area and possibly across it in surface areas or in surface segments according to the wear and tear and / or in accordance with the thermal conductivity and / or in accordance with the Coated thermal expansion coefficient.
  • a surface-hard material platinum can be applied by explosive plating.
  • a metal carbite, a metal oxide, a cermet or an alloy of these materials be, wherein powdered material particles by means of a thermal spray process, preferably by means of a detonation gun in the inner surfaces of the mold be shot in or using a plasma torch in the plasma jet be thrown onto the inner surface of the mold.
  • DE-OS 1 957 332 discloses a continuous casting mold for casting metal, especially steel, in which at least the one that encompasses the bathroom mirror area Part of the walls of the mold main body forming the mold cavity from one Use of a material with a material that is different from that of the main mold body lower thermal conductivity.
  • the insert can be form-fitting in the walls forming the mold cavity may be inserted. But it can also come from one massive metal body. And finally, the massive one Metal body also consist of a sintered material.
  • As Material for the metal body copper-molybdenum or a copper-chrome alloy or a copper-cobalt-beryllium alloy is provided.
  • Reference number 1873 discloses a casting mold for continuous casting, consisting of low density graphite, with a coating of a thin layer of copper and silver.
  • Reference number 1875 describes a mold with a metal spray coating for forming a mold surface of a thin layer with closely spaced welded particles, which preferably consist of the same metal as the walls of the mold, with a thickness between 0.13 and 1.00 mm.
  • Reference number 1876 describes a mold with a cobalt alloy coating, for example with 50% cobalt and 30% chromium.
  • the coating is applied electrolytically or using a plasma spray to the copper plates.
  • the material of the walls can also consist of a 50% cobalt alloy.
  • Reference number 1877 discloses a mold with a circumferential metal insert with a thermal conductivity lower than copper, for example made of a copper-chromium alloy.
  • Reference number 1878 discloses a metal casting mold with an inner coating layer with lower conductivity and friction than the base material, with a section of the layer, for example, 50 mm above and 300 to 500 mm below the meniscus in the form of a band encircling a large number of both metal and as well as non-metal layers. This layer reduces the heat removal from the surface of the casting material.
  • Reference number 1879 describes a mold with improved thermal conductivity, thermal stress and wear resistance, produced by an inner Nikkel plating and heating in an oxidizing atmosphere to form a Nikkel-Kuper deformation layer.
  • Reference number 1880 describes a mold containing a layer of a hardened copper alloy with more than 85% copper and up to 3% of an alloy element suitable for hardening, for example chromium, silicon, silver, beryllium, the thermal conductivity of the alloy being no less than that of pure copper.
  • Reference number 1881 describes a mold with improved wear resistance. This is achieved by an electrolytic coating of silver or chrome with the highest surface smoothness, or by spray application of a 0.2 to 0.5 mm thick molybdenum layer with a slight smoothing.
  • Reference number 1882 describes a mold made with a metal-ceramic mixture, for example with an 85 to 20 volume percent metal phase made of molybdenum and tungsten, and 15 to 80 volume percent of a ceramic phase made of zirconium oxide, or calcium oxide, or a mixture both oxides. Up to 50 percent by weight of the zirconium oxide can be replaced by rhodium oxide, hafnium oxide or titanium oxide or mixtures thereof. The molds made with it should have an extremely long period of disposal.
  • the reference number 1883 describes a mold with a molded part of a material with 15 to 80 percent by volume finely divided, high-melting oxide-ceramic phase and 85 to 20 percent by volume metal phase.
  • Suitable materials include zirconium oxide as the ceramic component and molybdenum or tungsten as the metal component.
  • Reference number 1884 describes a particularly abrasion-resistant mold consisting entirely of ceramic material such as zirconium oxide, tallium oxide, aluminum oxide, magnesium oxide or mixtures thereof at the filling end. The ceramic zone can be at least 3 mm thick.
  • the reference number 1885 describes a continuous casting mold consisting of a copper casting with an internal electrical deposit using a solution of copper cyanide.
  • the comparatively broad state of the art essentially includes training the mold surfaces in direct contact with molten steel, the highest thermal, metallurgical and mechanical loads exposed, with resistant coatings or with inserts made of special materials.
  • the invention has for its object to accommodate the immediate Contact with a suitable working coating on the steel melt Base material of the mold plates, for example copper or copper alloy, suitable Formation of an intermediate layer to indicate the heat flow density, especially when casting peritectic steels and austenitic steels Stainless steels reduced, which increased relative to the board base material Compensates for the elasticity of the working coating and its differences in strength and the resulting from constantly repeated temperature changes withstands extreme loads.
  • a suitable working coating on the steel melt Base material of the mold plates for example copper or copper alloy
  • suitable Formation of an intermediate layer to indicate the heat flow density especially when casting peritectic steels and austenitic steels
  • Stainless steels reduced which increased relative to the board base material Compensates for the elasticity of the working coating and its differences in strength and the resulting from constantly repeated temperature changes withstands extreme loads.
  • the task is solved with a continuous casting mold in the preamble of Claim 1 designated with the invention in that the for recording surface areas of the mold plates provided for the coating or an insert in the form of an intermediate layer between the coating and the Mold plate material with at least one roughened surface, or made of porous Material are formed.
  • This rough intermediate layer is particularly advantageous for the latter Porosity is the heat flow density between the steel melt on the one hand and the base material of the mold plates, on the other hand, significantly reduced the thermal expansion differences between the working coating on the one hand and the mold plate base material on the other hand as well the differences in strength between these compensated and thus the out Repeated changes in temperature caused extreme stresses relativized.
  • the intermediate layer can also be very advantageously applied to the base material Mold made of sintered metal that can be applied under high pressure and high temperature with a rough surface according to their porosity.
  • the roughened surface can be targeted by heat treatment producible scale skin.
  • FIG. 1 shows part of a continuous casting mold which can be assembled from copper plates, in particular for the continuous casting of thin slabs of steel, the Containing plates, in particular in the meniscus area 6, with a working coating 1 different metals, metal oxides or ceramic material corrosion or are equipped with abrasion resistance, the according to the invention provided for receiving the coating 1 surface areas in the form of a Intermediate layer 3 between the working coating 1 and the mold plate material 4 with at least one roughened surface 5 or made of porous material are trained.
  • FIG. 2 The exemplary embodiment according to the invention according to FIG. 2 in that an insert 2 in the mold wall 4 instead of the coating 1 is provided. There is between this insert 2 and the mold plate material 4 an intermediate layer 3 with at least one roughened surface 5 or made of porous Material trained.
  • the intermediate layer 3 can have a thickness between 100 and 1000 microns, the roughness of the roughened surface 5 between 25 and 250 microns is.
  • the intermediate layer 3 contains, on the one hand, one corresponding to the mold base material 4 Material component, for example copper or copper alloy, and on the other hand a material component corresponding to the working coating 1 such as metal oxide, ceramic or special metallic materials, e.g. B. Cr, Si, Co, Ni, Ag, Al or other mixtures.
  • Material component for example copper or copper alloy
  • a material component corresponding to the working coating 1 such as metal oxide, ceramic or special metallic materials, e.g. B. Cr, Si, Co, Ni, Ag, Al or other mixtures.
  • the roughened surface 5 is produced by sandblasting or shot peening. But it can also be in the form of fine sharp notches by mechanical Machining such as milling, face turning, rough grinding, scoring or blasting his.
  • the intermediate layer 3 one on the base material 4 of the mold under layer of sintered metal with high pressure and high temperature is a rough surface 5 according to its porosity.
  • the roughened surface 5 can be made by heat treatment producible scale skin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP00114706A 1999-07-15 2000-07-08 Lingotière de coulée continue Withdrawn EP1068913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19933026 1999-07-15
DE1999133026 DE19933026A1 (de) 1999-07-15 1999-07-15 Stranggießkokille

Publications (1)

Publication Number Publication Date
EP1068913A1 true EP1068913A1 (fr) 2001-01-17

Family

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Family Applications (1)

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EP00114706A Withdrawn EP1068913A1 (fr) 1999-07-15 2000-07-08 Lingotière de coulée continue

Country Status (2)

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EP (1) EP1068913A1 (fr)
DE (1) DE19933026A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT500814A1 (de) * 2004-10-13 2006-04-15 Voest Alpine Ind Anlagen Verfahren zur erhöhung der lebensdauer der breitseitenwände einer verstellkokille

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4574065B2 (ja) 2001-06-01 2010-11-04 本田技研工業株式会社 半凝固鉄系合金の成形用金型
DE102006037458A1 (de) * 2006-08-10 2008-02-14 Bayerische Motoren Werke Ag Gusseinrichtung, insbesondere Niederdruckgusseinrichtung
DE102017211108A1 (de) * 2017-06-30 2019-01-03 Thyssenkrupp Ag Kokillenplatte und Kokille für eine Stranggießanlage sowie Strangguss-Verfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570453A (en) * 1978-11-22 1980-05-27 Fujiki Kosan Kk Continuous casting mold and production thereof
EP0052947A1 (fr) * 1980-11-22 1982-06-02 John E. Mapplebeck Limited Moule de coulée
US4538667A (en) * 1981-04-27 1985-09-03 Sumitomo Metal Industries, Ltd. Molds for continuously casting steel
JPH0824997A (ja) * 1994-07-12 1996-01-30 Yoshizawa L Ee Kk 連続鋳造用鋳型
JPH08187555A (ja) * 1994-12-29 1996-07-23 Mishima Kosan Co Ltd 連続鋳造用鋳型

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570453A (en) * 1978-11-22 1980-05-27 Fujiki Kosan Kk Continuous casting mold and production thereof
EP0052947A1 (fr) * 1980-11-22 1982-06-02 John E. Mapplebeck Limited Moule de coulée
US4538667A (en) * 1981-04-27 1985-09-03 Sumitomo Metal Industries, Ltd. Molds for continuously casting steel
JPH0824997A (ja) * 1994-07-12 1996-01-30 Yoshizawa L Ee Kk 連続鋳造用鋳型
JPH08187555A (ja) * 1994-12-29 1996-07-23 Mishima Kosan Co Ltd 連続鋳造用鋳型

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 111 (M - 025) 9 August 1980 (1980-08-09) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT500814A1 (de) * 2004-10-13 2006-04-15 Voest Alpine Ind Anlagen Verfahren zur erhöhung der lebensdauer der breitseitenwände einer verstellkokille

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Publication number Publication date
DE19933026A1 (de) 2001-01-18

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