EP0141904B1 - Lingotière pour la coulée continue - Google Patents

Lingotière pour la coulée continue Download PDF

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Publication number
EP0141904B1
EP0141904B1 EP84108014A EP84108014A EP0141904B1 EP 0141904 B1 EP0141904 B1 EP 0141904B1 EP 84108014 A EP84108014 A EP 84108014A EP 84108014 A EP84108014 A EP 84108014A EP 0141904 B1 EP0141904 B1 EP 0141904B1
Authority
EP
European Patent Office
Prior art keywords
mold
strip
grids
continuous casting
contact surface
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
Application number
EP84108014A
Other languages
German (de)
English (en)
Other versions
EP0141904A1 (fr
Inventor
Wolfgang Prof. Dr.-Ing. Gruhl
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke 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 Vereinigte Aluminium Werke AG filed Critical Vereinigte Aluminium Werke AG
Priority to AT84108014T priority Critical patent/ATE32035T1/de
Publication of EP0141904A1 publication Critical patent/EP0141904A1/fr
Application granted granted Critical
Publication of EP0141904B1 publication Critical patent/EP0141904B1/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
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a continuous casting mold, consisting of an indirect cooling part with a jacket-shaped contact surface between the mold wall and the cast strand and a subsequent direct cooling part with a web-shaped contact surface and coolant openings in the grooves between the webs.
  • German Patents 12 83 442 (forming the preamble of claim 1), 18 08 415 and 19 57 314.
  • the belt is cooled indirectly in the first part of the mold and in the second part by direct water spraying, in that the strand is guided between longitudinal webs.
  • the coolant introduced under pressure is at the belt surface at a speed which is several times the casting speed. led along.
  • a vacuum is generated in the molds within the injection zones, which on the one hand prevents the cooling water from backing up to the mold inlet and thus prevents the belt from freezing, and on the other hand causes the lubricant to be sucked in.
  • the object of the present invention is to avoid the disadvantages described and to develop a continuous casting mold for the horizontal casting of thin strips of aluminum and aluminum alloys, with which strips can be produced which have no cracks and have a uniform casting structure and thus a smooth surface, so that they can be processed directly by cold rolling without prior mechanical surface treatment.
  • this object is achieved by the features of claim 1.
  • This web shape increases the size of the directly cooled zone of the cast belts, which leads to more even heat removal. A similar effect can be achieved if the webs are rounded (Fig. 2b).
  • a further particular advantage has been shown that the casting speed can be increased by approximately 30% for both unalloyed and alloyed materials without the casting errors mentioned occurring.
  • a further improvement of the mold according to the invention can be achieved by coating the surfaces in contact with the surface of the cast strip with a 20 to 40 ⁇ m thick hard chrome layer or a nickel layer.
  • the comparative mold A not shown and the mold B according to the invention are of the same design and dimensions with the exception of the webs arranged in the direct cooling part.
  • these are flattened in a conventional manner on the contact surface between the mold wall and the cast strand, so that mold A has a contact width of 2.5 mm per web.
  • the mold according to the invention is tapered on the contact surfaces, as is shown in perspective in FIG. 1.
  • the direct cooling part 3 consists of the coolant openings 4 and the webs 5, which are tapered on the contact surface to the cast strand 6.
  • the width of the contact surface in the mold 3 is 0.1 mm.
  • the tape from mold A showed sporadic longitudinal cracks (photo 1) and irregular cast structures that appeared on the surface (photo 2).
  • the tape from mold B (photo 3) was free of cracks and showed an even casting structure.
  • FIG. 2a Two alternative web shapes are shown in FIG. 2.
  • the preferred embodiment according to Fig. 2a has pointed web ends, which has a support width of less than 0.1 mm. This bar shape allows casting particularly difficult-to-cast AIMgSi alloys without cracks.
  • This web shape is particularly low-wear and therefore suitable for high-strength alloys, especially in connection with hard chrome plating or nickel plating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Laminated Bodies (AREA)
  • Cephalosporin Compounds (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Claims (4)

1. Lingotière pour la coulée continue d'une bande continue d'aluminium, constituée d'une zone de refroidissement indirect présentant une surface de contact en forme de chemise entre la paroi de la lingotière et la bande coulée en continu, ainsi qu'une zone de refroidissement direct, voisine, (3), présentant une surface de contact ayant des nervures et des ouvertures (4) pour le fluide de refroidissement dans les rainures situées entre les nervures (5), caractérisée en ce que les nervures (5) sont taillées en pointe ou arrondies en direction de la bande coulée (6), avec formation d'une étroite zone d'appui de la bande, la largeur de la zone d'appui étant inférieure à 0,5 mm.
2. Lingotière pour la coulée continue selon la revendication 1, caractérisée en ce que les rainures se terminent, en direction de la nervure (5), en un rayon de courbure qui est inférieur à 50 % de la largeur de la nervure.
3. Lingotière pour la coulée continue selon l'une des revendications précédentes, caractérisée en ce que les surfaces de contact entre la bande coulée (6) et la lingotière sont chromées dures ou nickelées.
4. Emploi d'une lingotière pour la coulée continue selon l'une des revendications 1 à 3 pour couler en continu les alliages d'aluminium du type AIMg, AIMgMn, AIMn et AiMgSi.
EP84108014A 1983-09-19 1984-07-09 Lingotière pour la coulée continue Expired EP0141904B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108014T ATE32035T1 (de) 1983-09-19 1984-07-09 Stranggiesskokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3333811A DE3333811C1 (de) 1983-09-19 1983-09-19 Stranggiesskokille fuer Aluminium-Strangbaender
DE3333811 1983-09-19

Publications (2)

Publication Number Publication Date
EP0141904A1 EP0141904A1 (fr) 1985-05-22
EP0141904B1 true EP0141904B1 (fr) 1988-01-20

Family

ID=6209489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108014A Expired EP0141904B1 (fr) 1983-09-19 1984-07-09 Lingotière pour la coulée continue

Country Status (6)

Country Link
EP (1) EP0141904B1 (fr)
JP (1) JPS6087953A (fr)
AT (1) ATE32035T1 (fr)
CA (1) CA1245035A (fr)
DE (1) DE3333811C1 (fr)
NO (1) NO161606C (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE576793A (fr) * 1958-03-17
CH528939A (de) * 1968-11-12 1972-10-15 Vaw Ver Aluminium Werke Ag Vorrichtung zum vollkontinuierlichen Giessen von metallischen Strängen dünnen Querschnitts, wie Bändern, Drähten oder dergleichen
FR2304425A1 (fr) * 1975-03-17 1976-10-15 Alcan Res & Dev Dispositif pour la coulee continue entre deux surfaces mobiles d'un metal sous forme de bande
GB2094193B (en) * 1981-01-28 1985-07-17 Sumitomo Light Metal Ind Mould for direct-clue casting of metals

Also Published As

Publication number Publication date
EP0141904A1 (fr) 1985-05-22
ATE32035T1 (de) 1988-02-15
JPS6087953A (ja) 1985-05-17
DE3333811C1 (de) 1984-07-26
CA1245035A (fr) 1988-11-22
NO161606B (no) 1989-05-29
NO843062L (no) 1985-03-20
NO161606C (no) 1989-09-06

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