EP0543092B1 - Procédé de reparation d'une coquille pour la coulée continue de l'acier - Google Patents

Procédé de reparation d'une coquille pour la coulée continue de l'acier Download PDF

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Publication number
EP0543092B1
EP0543092B1 EP92114442A EP92114442A EP0543092B1 EP 0543092 B1 EP0543092 B1 EP 0543092B1 EP 92114442 A EP92114442 A EP 92114442A EP 92114442 A EP92114442 A EP 92114442A EP 0543092 B1 EP0543092 B1 EP 0543092B1
Authority
EP
European Patent Office
Prior art keywords
mould
copper
wear
mold
mandrel
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
EP92114442A
Other languages
German (de)
English (en)
Other versions
EP0543092A1 (fr
Inventor
Egon Evertz
Rolf Prof.Dr.-Ing. Deybold
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0543092A1 publication Critical patent/EP0543092A1/fr
Application granted granted Critical
Publication of EP0543092B1 publication Critical patent/EP0543092B1/fr
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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/057—Manufacturing or calibrating the moulds

Definitions

  • the invention relates to a method for working up one-piece copper molds which have become unusable due to wear and tear for the continuous casting of steel, the inner sides being removed mechanically to the depth of wear.
  • One-piece copper molds of this type generally have a rectangular inner cross section, which decreases in the direction of flow, corresponding to the decreasing volume of the steel that is solidifying. Furthermore, they are curved in their longitudinal direction. In this respect, they are considered to be geometrically complicated, which requires a corresponding manufacturing outlay. Therefore, it is usually economical to repair worn molds as far as the state of wear permits. Of course, a repair procedure must also take the geometric conditions into account. It is therefore customary to mechanically process the molds on the inside by removal, the removal having to extend to the depth of the wear. As a result, however, the mold is then thinner than before, so that ultimately falling below the wall thickness required for thermal and strength reasons places limits on the repair options. An ablation process in which the mold taper is reversed is ultimately subject to these restrictions.
  • the object of the invention is to further develop the known method in such a way that the mold can be restored to its original state. So you should not only have the original internal dimensions, but also be unchanged on the outside, so that the strength and the cooling effect are unchanged. If necessary, grooves should also run in the outer wall, which are required for the sealing connection to a coolant system.
  • this object is achieved in that, according to the characterizing part of patent claim 1 A combination of different features is selected, the application of which leads to a repaired mold that matches the original dimensions.
  • the extent of the deformation provided according to the invention is evident from the fact that the mold after the inventive treatment is longer than before. It is therefore finally shortened to its specified length.
  • the extent of the longitudinal section can be concluded from the deformation that has occurred.
  • the copper applied to the outer sides of the mold is generally chosen to be approximately twice the volume as it was removed on the inside in accordance with the internal wear. Precise specifications for this depend on the size of the molds from. You can easily determine them empirically.
  • the elongation of the mold described above by the treatment according to the invention is not only important as a control measure for the deformation that has occurred, but also has a constructive meaning in the case of molds with groove tracks provided on the outer edge for the connection of cooling devices. These groove tracks would not be retained by the measures proposed according to the invention in detail.
  • the part which extends beyond the stated dimension is cut off after the shaping, whereupon the groove tracks can finally be introduced again in the edge zones in a further process cut.
  • the invention proves itself very well when it is important on the one hand to create a mechanically and thermally highly resilient forming structure and on the other hand to be able to restore the groove tracks in the result in the type of forming.
  • the mold 6 shown in FIG. 1 is curved in its longitudinal direction, as shown in particular by the longitudinal axis 7. Accordingly, their internal dimensions 2 are curved on the one hand and on the other hand in the exit direction still conical.
  • a new internal dimension 3 is achieved, which is initially still above the intended value.
  • the mold 6 undergoes an external treatment, which consists in the application of copper.
  • the original outer dimension 1 becomes larger due to the treatment, so that the new outer dimension 4 results.
  • the mold treated with these values of the internal and external dimensions is treated with an internal mandrel and a drawing nozzle, as taught by the proposal of the invention. Such methods are known as such and do not form the subject of the invention.
  • DE-OS 39 08 977.0 deals with such a reshaping.
  • the increase in length 5, as illustrated in the lower part of FIG. 3, is interesting in the sense of the present invention. This length must be cut off in order to regain the initial shape of the mold. After the mechanical removal of the increase in length, the mold not only assumed the original values in terms of its length, but also in terms of its internal dimension 2 and its external dimension 1.
  • Figure 4 shows a mold corresponding to Figure 1 with an upper circumferential groove 10, which serves for the sealing connection to a coolant system.
  • This groove 10 presupposes a length section 9, the extension of which in the longitudinal direction of the mold must be obtained as a longitudinal expansion in the treatment according to the invention, in order to have the initial shape available again after mechanical incorporation of a new groove 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (4)

  1. Procédé de traitement de busettes de coulée monopièces en cuivre pour coulée continue d'acier devenues inutilisables par usure, la face intérieure en étant retirée mécaniquement jusqu'à la profondeur de l'usure,
    caractérisé en ce que
       du cuivre est déposé sur la face extérieure du corps de la busettes de coulée,
       un mandrin correspondant à la cote intérieure de la busette de coulée est introduit à l'intérieur de celle-ci,
       la busette de coulée avec le mandrin est tirée à travers une buse correspondant à sa cote extérieure de sorte telle que sa face intérieure soit posée sur le mandrin et que sa longueur augmente,
       et enfin en ce que la busette de coulée est raccourcie à une longueur prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que
       le cuivre déposé sur la face extérieure de la busette de coulée est précipité galvaniquement avec environ le double du volume que celui qui a été retiré conformément à l'usure intérieure.
  3. Procédé selon la revendication 1 pour busettes de coulée réalisées avec des rainures extérieures destinées au raccordement étanche d'équipements d'agents de refroidissement caractérisé en ce que
       la précipitation de cuivre sur la face extérieure de la busette de coulée soit réalisée à la condition que l'élongation voyant le jour lors de l'étirage ultérieur dépasse le secteur du bord formé avec des rainures,
       et que de nouvelles rainures y soient usinées.
  4. Procédé selon les revendications 1 à 3, caractérisé en ce que
       le raccourcissement ultérieur est réalisé mécaniquement.
EP92114442A 1991-08-27 1992-08-25 Procédé de reparation d'une coquille pour la coulée continue de l'acier Expired - Lifetime EP0543092B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128365 1991-08-27
DE4128365A DE4128365A1 (de) 1991-08-27 1991-08-27 Verfahren zur aufarbeitung von kupferkokillen fuer das stranggiessen von stahl

Publications (2)

Publication Number Publication Date
EP0543092A1 EP0543092A1 (fr) 1993-05-26
EP0543092B1 true EP0543092B1 (fr) 1996-06-12

Family

ID=6439202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114442A Expired - Lifetime EP0543092B1 (fr) 1991-08-27 1992-08-25 Procédé de reparation d'une coquille pour la coulée continue de l'acier

Country Status (4)

Country Link
EP (1) EP0543092B1 (fr)
AT (1) ATE139159T1 (fr)
DE (2) DE4128365A1 (fr)
ES (1) ES2090429T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012490C2 (de) * 1980-03-31 1984-05-10 Goetze Ag, 5093 Burscheid Vorrichtung zum Galvanisieren der Mantelflächen zylindrischer Werkstücke
JPS5838637A (ja) * 1981-09-01 1983-03-07 Nippon Steel Corp 連続鋳造用鋳型の補修方法
DE3313503A1 (de) * 1983-04-14 1984-10-18 Evertz, Egon, 5650 Solingen Einteilige durchlaufstranggiesskokille und verfahren zu ihrer herstellung
FI71243C (fi) * 1984-06-27 1986-12-19 Outokumpu Oy Foerfarande och anordning foer framstaellning av koppar- ellerkopparlegeringsroer bildade kokiller foer straenggjutning smskiner foer ett aemne
FI852493L (fi) * 1985-06-24 1986-12-25 Outokumpu Oy Kokill.
DE3908977C2 (de) * 1989-03-18 1995-09-07 Egon Evertz Vorrichtung zum verformen von rohrartigen, bogenförmigen Rohrkörpern

Also Published As

Publication number Publication date
ATE139159T1 (de) 1996-06-15
DE59206552D1 (de) 1996-07-18
EP0543092A1 (fr) 1993-05-26
DE4128365A1 (de) 1993-03-04
ES2090429T3 (es) 1996-10-16

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