EP0108744A2 - Lingotière à extrémités ouvertes pour une installation de coulée continue - Google Patents

Lingotière à extrémités ouvertes pour une installation de coulée continue Download PDF

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Publication number
EP0108744A2
EP0108744A2 EP83890186A EP83890186A EP0108744A2 EP 0108744 A2 EP0108744 A2 EP 0108744A2 EP 83890186 A EP83890186 A EP 83890186A EP 83890186 A EP83890186 A EP 83890186A EP 0108744 A2 EP0108744 A2 EP 0108744A2
Authority
EP
European Patent Office
Prior art keywords
wear
resistant layer
mold
inner walls
continuous
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.)
Granted
Application number
EP83890186A
Other languages
German (de)
English (en)
Other versions
EP0108744B1 (fr
EP0108744A3 (en
Inventor
Erich Misera
Hubert Floh
Reinhard Hargassner
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.)
Voestalpine AG
Original Assignee
Voestalpine 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
Priority claimed from AT402382A external-priority patent/AT375571B/de
Priority claimed from AT132083A external-priority patent/AT377932B/de
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0108744A2 publication Critical patent/EP0108744A2/fr
Publication of EP0108744A3 publication Critical patent/EP0108744A3/de
Application granted granted Critical
Publication of EP0108744B1 publication Critical patent/EP0108744B1/fr
Expired 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 mold for a continuous casting installation, in particular a steel continuous casting installation, with inner walls made of copper or a copper alloy, the inner walls being provided with a wear-resistant layer on their side facing the mold cavity.
  • the thickness of the wear-resistant layer has been kept as small as possible; it was chosen to be no larger than 1.5 mm. If the wear-resistant layer is applied electrolytically to the inner walls, since the electrolytic process is an expensive process, the layer thickness has been kept even smaller, for example in a range of a maximum of a few tenths of a millimeter. This results in another disadvantage; it has been shown that a deviation in the shape of the mold sidewalls only starts from a dimension of about 2 mm Strand quality decisively influenced, so that one was forced to replace the wear-resistant layer before reaching a maximum permissible shape deviation, namely when the wear-resistant layer was used up.
  • the invention aims at avoiding these disadvantages and difficulties and has as its object to create a continuous mold of the type described in the introduction, in which, despite a wear-resistant layer that can be applied relatively thickly, the heat transfer is only slightly, if at all, reduced compared to a mold having uncoated inner walls, and which is inexpensive to manufacture despite a relatively thick wear-resistant layer.
  • the wear-resistant layer extends from the outlet end of the mold to a maximum of over a third of the length of the mold in the central region of the inner walls and in the side regions of the inner walls supporting the edges of the strand over at least the length of the wear-resistant layer in the central region extends to a maximum of the entire length of the mold.
  • the area where the greatest heat transfer takes place ie the area between the casting level and the first lifting of the strand shell, is thus from the inner walls of the continuous mold, kept free of a wear-resistant layer, so that the heat transfer in this area takes place in the same way as in conventional continuous molds without a wear-resistant layer.
  • the wear on the remaining inner wall parts is substantially reduced only in the outlet area of the mold, since it was found that the wear originates from the outlet-side end edges of the mold side walls.
  • the wear progresses to a certain extent from the outlet end of the mold to the casting level, ie to the inlet end of the mold. Preventing the start of wear at the outlet end of the mold surprisingly also results in a significant reduction in wear on the unprotected inner wall parts closer to the inlet end of the mold.
  • the wear-resistant layer is formed from the side regions of the inner wall to the central region of the inner wall according to an essentially concave curve, for example in the form of a semicircle or in a U-shape.
  • the wear-resistant layer consists of martensitic steel with a content of chromium and molybdenum, advantageously the wear-resistant layer 0.1 to 1.5% carbon, 2 to 20% chromium, 0.5 to 15% molybdenum and optionally to contains 5% tungsten, up to 5% vanadium and up to 5% niobium, balance iron and melting-related impurities.
  • a relatively simple and inexpensive Ver Drive to apply the wear-resistant layer is characterized in that between the wear-resistant layer and the inner wall, an intermediate layer made of a nickel-copper alloy is applied to the inner wall by build-up welding and the wear-resistant layer is also applied by build-up welding in a thickness of 3 to 10 mm the intermediate layer is applied.
  • the provision of an intermediate layer results in good mechanical adhesion between the wear-resistant layer and the inner walls.
  • the intermediate layer expediently contains 1 to 5% manganese, 0.5 to 1.5% silicon, 20 to 50% copper, the remainder nickel and melting-related impurities and optionally up to 5% niobium and / or iron and / or titanium.
  • the wear-resistant layer is applied directly to the inner wall without an intermediate layer by brazing, which makes it possible to achieve a good mechanical connection of the wear-resistant layer with the copper inner walls of the continuous mold despite the absence of the intermediate layer.
  • the wear-resistant layer is designed in the form of a lattice or rust, the surface areas of the inner walls lying between lattice or rust bars of the wear-resistant layer being formed from the base material of the inner walls.
  • the grate or grate bars are preferably inclined to the vertical axis of the mold, preferably arranged inclined at an angle between 30 and 60 °.
  • the ratio of the distance between two grate or grate bars to the width of a grate or grate bar is expediently in a range between 3 and .5.
  • the lattice-like wear layer is formed by lattice bars which are at right angles to one another and are arranged at the same distance from one another.
  • the grid-like wear layer according to the invention can be applied by welding in grooves in an inner wall.
  • a preferred method of applying the wear layer is characterized in that the inner wall is provided with grooves arranged in the form of a grid, that a grid is formed from bars of the wear-resistant layer and then this grid is pressed into the grooves of the inner wall, the grid being expediently from the rear the inner walls are secured with screws.
  • FIG. 1 is a view of a narrow side wall of a slab casting mold according to a first embodiment
  • FIG. 2 is a view of the same in accordance with a second embodiment
  • 3 is a view of a broad side wall of a continuous slab casting mold.
  • 4 and 5 illustrate a section along the line IV-IV of FIG. 1 and according to the line VV according to FIG. 2.
  • FIGS. 6, 8 and 9 show frontal views of the inner walls according to another embodiment.
  • Fig. 7 shows a section along the line VII-VII of Fig. 6.
  • the narrow side wall 1 of a continuous casting mold which is provided with internal cooling, is made of copper or a copper alloy.
  • a wear-resistant layer 4 which extends over the entire width 3, is applied in the outlet-side region 2 of this narrow side wall. This wear-resistant layer 4 extends over a length 5 of the mold with approximately 200 mm in the central region 6 of the side wall.
  • the total length 7 of the narrow side wall is 900 mm.
  • the wear-resistant layer extends over a greater length 10 (measured from the end), namely over a length of approximately 250 mm.
  • the entire width 3 of the side wall 1 is approximately 210 mm.
  • the limit curve of the wear-resistant layer is a concave curve 11, etc. it is formed approximately in the shape of a semicircle, the radius 12 of which corresponds to half the width 3.
  • the wear-resistant layer which has the following directional analysis: 0.9% carbon, 4.0% chromium, 9.5% molybdenum, 2.2% tungsten, 2.0% vanadium, the rest Iron and melting-related impurities, and which is applied in a thickness 13 of approximately 5 mm
  • an intermediate layer 14 is provided for the copper part of the narrow side wall 1, which has the following directional analysis: 0.02% carbon, 2.4% manganese, 0.75% Silicon, 30.0% copper, 1% niobium, 1% iron, 0.25% titanium, the rest nickel and melting-related impurities.
  • the hardness of the wear-resistant layer 4 is approximately 55 to 60 HRC.
  • the wear-resistant layer 4 in the central region 6 of the narrow side wall 1 with a width of 100 mm also extends over a length 5 of approximately 200 mm measured from the outlet-side end 15 of the narrow side wall.
  • the wear-resistant layer 4 extends in a length 10 of at least 250 mm. It is advantageous to guide the wear-resistant layer on these side regions 8, 9 up to the inlet-side end 16 of the narrow side wall.
  • the width 3 of the narrow side wall is approximately 210 mm.
  • the contour 11 of the wear-resistant layer is approximately U-shaped in the plan view of the narrow side wall 1.
  • the wear-resistant layer 4 is applied directly to the copper part of the narrow side wall 1, i.e. without intermediate layer 14, with brazing being chosen as the application method.
  • the chemical composition of the wear-resistant layer 4 corresponds approximately to that of a wear-resistant layer according to FIG. 1.
  • the wear of the wide side walls 17 is significantly less in relation to the wear of the narrow side walls.
  • a wear-resistant layer 4 can nevertheless be provided on the broad side walls, this wear-resistant layer 4 again being arranged only in the outlet region 2 of the broad side wall, as is shown in FIG. 3. 3, the wear-resistant layer is arranged approximately over a length 5 of 100 mm over the entire width 3, the mold length 7 is set at 900 mm and the width 3 of the broad side wall at about 1750 mm.
  • a grid-like wear-resistant layer 18 extending over the entire width 3 is provided in the outlet-side region 2 of a narrow side wall.
  • This grid-shaped layer 18 extends over a length 5 of the mold, with about 300 mm.
  • the total length 7 of the narrow side wall is 900 mm.
  • This wear-resistant layer advantageously consists of martensitic steel with a chromium and molybdenum content, advantageously 0.1 to 1.5% carbon, 2 to 20% chromium, 0.5 to 15% molybdenum and optionally up to 5% tungsten, contains up to 5% vanadium and up to 5% niobium, balance iron and melting-related impurities.
  • the wear-resistant layer is provided on an inner wall 1 as follows: First, grid-shaped grooves 19 with a depth 20 of approximately 7 to 10 mm are milled into the inner wall, whereupon the inner wall is preheated to a temperature of approximately 270 ° C. becomes. This temperature is below the recrystallization temperature of the material from which the inner wall is made.
  • An intermediate layer 21 is provided in these grooves 19 with a thickness of approximately 4 mm, etc. by cladding, which has the following directional analysis: 0.02% carbon, 2.4% manganese, 0.75% silicon, 30.0% copper, 1% niobium, 1% iron, 0.25% titanium, remainder nickel and melting-related Impurities.
  • the grooves 19 are then welded to the wear-resistant layer 18, cooled and finished.
  • the wear-resistant layer 18 has the following directional analysis: 0.9% carbon, 4.0% chromium, 9.5% molybdenum, 2.2% tungsten, 2.0% vanadium, remainder iron and melting impurities.
  • the bars 22 forming the wear-resistant layer are inclined at an angle 24 of 45 ° to the vertical axis 23 of the inner walls, and the ratio of the distance 25 of two adjacent bars 22 to the width 26 of a bar 22 is four.
  • the width 26 of a lattice bar 22 is approximately 5 mm.
  • the areas made of the material of the inner walls lying between the lattice bars are of square shape according to FIG. 6.
  • the embodiment shown in FIG. 8 differs from that according to FIG. 1 in that in the central region 6 of the inner wall 1 the length 5 of the lattice-like wear-resistant layer 18 extends to approximately 150 mm, whereas in the side regions 8, 9 of the inner wall the wear-resistant one Layer is guided over a length 10 of about 300 mm.
  • the total length 7 of the 'inner wall is also approximately 900 mm.
  • a particularly advantageous method for arranging the lattice-like wear-resistant layer can be accomplished by pressing a lattice welded from square bars 22 of the wear material into the grooves after milling out the lattice-shaped grooves 19, whereupon the lattice is screwed from the rear of the inner walls by means of screws 27 is secured.
  • the invention is not limited to the exemplary embodiments shown, but can be modified in various respects, for example it can also be used for continuous casting molds with billet cross-section, all four mold inner walls advantageously being provided with a wear-resistant layer in the same way, whereas molds with a slab cross-sectional format in the first place the application of the wear-resistant layer for the narrow sides is important; the broad sides could also be formed without a wear-resistant layer because of the significantly lower wear.
  • the coating usually provided for metallurgical reasons, e.g. Chromium plating, which serves to prevent copper from being absorbed into the melt, can be provided in the usual way on the inner walls of the mold after the wear-resistant layer has been applied. After application, this layer usually extends over the entire inner walls of the mold, but is quickly removed from the strand shell.
  • Chromium plating which serves to prevent copper from being absorbed into the melt

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP83890186A 1982-11-04 1983-10-20 Lingotière à extrémités ouvertes pour une installation de coulée continue Expired EP0108744B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT4023/82 1982-11-04
AT402382A AT375571B (de) 1982-11-04 1982-11-04 Durchlaufkokille fuer eine stranggiessanlage
AT132083A AT377932B (de) 1983-04-13 1983-04-13 Durchlaufkokille fuer eine stranggiessanlage
AT1320/83 1983-04-13

Publications (3)

Publication Number Publication Date
EP0108744A2 true EP0108744A2 (fr) 1984-05-16
EP0108744A3 EP0108744A3 (en) 1985-09-11
EP0108744B1 EP0108744B1 (fr) 1988-08-17

Family

ID=25595524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83890186A Expired EP0108744B1 (fr) 1982-11-04 1983-10-20 Lingotière à extrémités ouvertes pour une installation de coulée continue

Country Status (5)

Country Link
US (1) US4589468A (fr)
EP (1) EP0108744B1 (fr)
CA (1) CA1238762A (fr)
DE (1) DE3377700D1 (fr)
ES (1) ES285000Y (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166377A (en) * 1984-11-05 1986-05-08 Kabel Metallwerke Ghh Continous-casting moulds

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
DE19747305A1 (de) * 1997-10-25 1999-04-29 Km Europa Metal Ag Kokille für eine Stranggießanlage
US6470550B1 (en) * 1999-11-11 2002-10-29 Shear Tool, Inc. Methods of making tooling to be used in high temperature casting and molding
ATE539823T1 (de) * 2008-03-05 2012-01-15 Southwire Co Ultraschallsonde mit schutzschicht aus niobium
DE202009013126U1 (de) * 2009-09-29 2009-12-10 Egon Evertz Kg (Gmbh & Co.) Kokille zum Stranggießen
US8652397B2 (en) 2010-04-09 2014-02-18 Southwire Company Ultrasonic device with integrated gas delivery system
US8574336B2 (en) 2010-04-09 2013-11-05 Southwire Company Ultrasonic degassing of molten metals
WO2012157214A1 (fr) * 2011-05-17 2012-11-22 パナソニック株式会社 Moule, dispositif de coulée, et procédé de fabrication d'une tige coulée
JP6674376B2 (ja) 2013-11-18 2020-04-01 サウスワイヤー・カンパニー・リミテッド・ライアビリティ・カンパニーＳｏｕｔｈｗｉｒｅ Ｃｏｍｐａｎｙ，Ｌｌｃ 溶融金属の脱ガス用排気口付き超音波プローブ
US10233515B1 (en) 2015-08-14 2019-03-19 Southwire Company, Llc Metal treatment station for use with ultrasonic degassing system
DE102018208558A1 (de) 2018-05-30 2019-12-05 Sms Group Gmbh Verfahren zum Herstellen von aus Kupfer oder einer Kupferlegierung bestehenden, plattenförmigen Innenwänden einer Stranggießkokille und Innenwand einer Stranggießkokille

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DE1028298B (de) * 1955-05-10 1958-04-17 Julius & August Erbsloeh Komma Wassergekuehlte Stranggiessform
AT224826B (de) * 1959-03-16 1962-12-10 Mannesmann Ag Stranggußkokille
US3349836A (en) * 1965-09-03 1967-10-31 Concast Inc Continuous casting mold with armor strips
FR1523436A (fr) * 1967-03-23 1968-05-03 Siderurgie Fse Inst Rech Perfectionnements aux lingotières de coulée continue
BE758996A (fr) * 1969-11-14 1971-04-30 Kabel Metallwerke Ghh Lingotiere de coulee continue pour la coulee d'un metal, en particulierde l'acier
US3809148A (en) * 1972-11-30 1974-05-07 Copper Range Co Continuous casting die with compatible lining and jacket
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JPS5243726A (en) * 1975-10-03 1977-04-06 Kiyuushiyuu Tokushiyu Kinzoku Cu mould for continuous casting
DE2634633C2 (de) * 1976-07-31 1984-07-05 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Stranggießkokille aus einem Kupferwerkstoff, insbesondere zum Stranggießen von Stahl
JPS5446131A (en) * 1977-09-20 1979-04-11 Mishima Kosan Co Ltd Method of making mold for continuous casting process
DE2822004A1 (de) * 1978-05-19 1979-11-22 Nisshin Steel Co Ltd Verfahren zum stranggiessen von nichtrostendem stahl
US4171233A (en) * 1978-05-22 1979-10-16 Bethlehem Steel Corporation Lens quality of die steel
SU880615A1 (ru) * 1979-12-26 1981-11-15 Особое Конструкторское Бюро Института Высоких Температур Кристаллизатор дл непрерывной разливки металлов
JPS5938862B2 (ja) * 1980-07-16 1984-09-19 日立造船株式会社 連続鋳造設備のモ−ルド銅板表面処理法
JPS5732850A (en) * 1980-08-06 1982-02-22 Mishima Kosan Co Ltd Mold for continouos casting
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DE3142196C2 (de) * 1981-10-24 1984-03-01 Mishima Kosan Corp., Kitakyushu, Fukuoka Stranggießkokille mit Verschleißschutzschicht

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166377A (en) * 1984-11-05 1986-05-08 Kabel Metallwerke Ghh Continous-casting moulds

Also Published As

Publication number Publication date
EP0108744B1 (fr) 1988-08-17
ES285000Y (es) 1986-05-01
DE3377700D1 (en) 1988-09-22
CA1238762A (fr) 1988-07-05
US4589468A (en) 1986-05-20
ES285000U (es) 1985-09-01
EP0108744A3 (en) 1985-09-11

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