US3344846A - Apparatus for continuously horizontally casting high melting metals, particularly steel - Google Patents

Apparatus for continuously horizontally casting high melting metals, particularly steel Download PDF

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Publication number
US3344846A
US3344846A US483104A US48310465A US3344846A US 3344846 A US3344846 A US 3344846A US 483104 A US483104 A US 483104A US 48310465 A US48310465 A US 48310465A US 3344846 A US3344846 A US 3344846A
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Prior art keywords
casting
mold
steel
high melting
pouring
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Expired - Lifetime
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US483104A
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English (en)
Inventor
Alexander V Rossing
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Deutsche Edelstahlwerke AG
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Deutsche Edelstahlwerke AG
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    • 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
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould

Definitions

  • melts need not be significantly overheated because handling times and distances are short, conventional foundry cranes can be used without transferring ladies from one handling device to another, so that the temperature losses prior to pouring are minimised;
  • the stationary pouring vessel has a pouring spout which projects into the oscillating mold, closing the entire cross section of the entry end of the mold.
  • the continuouscasting is withdrawn from the mold in conventional manner at a constant rate by carrying it on a live roller bed, and the casting is finally cooled to complete solidification in a subsequent cooling stage in which it is sprayed with water.
  • FIGS. la to 1d first of all schematically illustrate the method which has in the past been unsuccessfully used for continuously casting steel to produce horizontal castings of circular section.
  • the individual drawings in FIGS. 1a to 1d show consecutive stages in the casting procedure and they illustrate how and why the above mentioned transverse seams form.
  • FIG. 1 A longitudinal section of the horizontal mold 1 which has a cylindrical internal cross section is shown in FIG.
  • the mold is cooled in a manner well known in the art and oscillates in the horizontal direction.
  • 2 is a longitudinal section of the pouring spout which projects into the front end of the mold.
  • a dummy billet 3 in the same way as in vertical casting, permits the casting to be withdrawn when a casting cycle begins and the leading end of the casting to be pulled on to a live roller bed.
  • the head of the dummy billet 3 carries a heavy machine screw 4 as well as between one and three sealing plates 5 which may be asbestos.
  • the solidified steel embraces the head of the machine screw 4 and thus forms a withdrawing head 8.
  • an annular region 9 of solidified steel forms adjacent the end face 6 of the pouring spout 2 due to the additional heat the pouring spout extracts from the metal, and this solidified zone adheres more or less firmly to the end of the spout.
  • FIG. 1b shows that after an indeterminate number of oscillations of the oscillating mold 1 the solidified shell 13 which extends from the solidified annulus 9 finally detaches itself from the face 6 of the spout 2. At 14 this part of the solidifying shell joins the part of the shell 11 which extends from the casting head and the whole is finally withdrawn from the mold. A fresh shell 15 begins to form adjacent shell 13 and progressively continues to extend along the mold wall. Since the rear end of shell 13 has already considerably cooled when it becomes detached from the spout 2 the joint at 16 is not a very good weld and thus gives rise to the formation of the transverse seam 16.
  • the circumferential shell which originates at and grows from the solidified annulus at 17 may detach itself rather later from the end of the pouring nozzle 2.
  • the weakest point 18 between the shell and annulus 17 will then have moved into such close proximity to the end of the mold that it cannot become very much thicker before emerging therefrom. Bursting of the casting is then hardly avoidable, particularly since it is impossible to determine the course of events during the casting procedure and to control the casting rate in accordance therewith.
  • the invention therefore proposes apparatus for horizontally continuously casting, particularly steel, in which the metal enters a cooled axially oscillating mold through a pouring spout, which is characterised by an extensionat the entry end of the mold having an inside diameter which is less than that of the mold itself.
  • This novel mold extension consists of a metal or metal alloy of good ther- 4 mal conductivity, such as copper or a copper alloy, and it is cooled in the conventional manner casting molds are cooled.
  • FIG. 2 An embodiment of the proposed casting machine for continuous casting of circular sections is first of all illustrated in FIG. 2.
  • the entry of the horizontal mold which is cooled in conventional manner is indicated in this drawing at 19.
  • the proposed entry extension which here consists of a copper sleeve 20 and a steel shell 21 is attached to the entry end of the mold.
  • a suitable coolant is circulated through the annular gap at 22, the coolant entering say at 23 and leaving at some other appropriate point not specially shown in the drawing.
  • the inside diameter of the extension sleeve 20 or of a single-part extension must be between 2 and 20% smaller than the internal diameter of the mold itself, according to the diameter of the continuous casting, the smaller value applying to large cross sections and the greater to castings of smaller cross section.
  • the extension forms a shoulder 24 at the entry end of the mold. The presence of this shoulder 24 ensures that the solidified steel is entrained by the motion of the mold and lifted off the end face of the pouring nozzle 25.
  • the sliding surfaces are supplied with a suitable lubricant through channels 26.
  • the inside surfaces that is to say the sliding surfaces of the extension sleeve 20, may also be hardened or chormised.
  • the steel shell 27 which carries the pouring spout 25 and which is attached to the pouring vessel 28 need not necessarily be cooled because the end face of the pouring spout 25 transmits most of the heat it extracts from the liquid metal to the extension sleeve 20.
  • Channel 29 is insulated by a refractory lining 31 from the pouring spout 25 and the steel shell 27.
  • the procedure used for preventing the development of the transverse seams with the aid of the mold extension proposed by the present invention consists in cyclically axially reciprocating the mold and its extension during the casting process. Unlike the method of oscillation conventionally used the proposed reciprocation of the mold proceeds in the following three stages:
  • 3rd stage the mold remains in starting position for a brief period before beginning the movement of the first stage of the cycle again.
  • the speed of the 1st stage movement is roughly equal to the casting rate.
  • the return movement (stage 2) is at a higher speed.
  • the proposed mold extensions which has a cross section smaller than that of the mold itself also affords the possibility of horizontally casting other than circular sections.
  • a pouring spout and an extension of circular section are used and only the mold corresponds to the non-circular section it is intended to cast.
  • FIGS. 4a to 7b which schematically represent possible ways of casting square or rectangular sections.
  • the mold 43, the extension 44 and the pouring spout 45 in each of the following drawings are seen in the direction A in FIG. 4a.
  • the internal diameter of the extension(s) must be smaller than the minimum internal diameter of the mold itself.
  • Apparatus for continuously horizontally casting high melting metals, especially steel comprising a horizontally disposed axially reciprocable continuous casting mold and a pouring spout attached to a stationary pouring vessel and by way of which the molten metal can enter and at least partly solidify in the mold, said mold having rigidly aflixed to its entry end an extension having a channel which is axially aligned with the mold and has a diameter to form with the internal surface of the mold a shoulder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US483104A 1964-09-01 1965-08-27 Apparatus for continuously horizontally casting high melting metals, particularly steel Expired - Lifetime US3344846A (en)

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DED0045324 1964-09-01

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556197A (en) * 1968-02-05 1971-01-19 Kaiser Aluminium Chem Corp Apparatus for lubricating a molten metal mold
US3598174A (en) * 1967-07-28 1971-08-10 Martel Catala & Cie Ets Continuous casting installations
US3630266A (en) * 1969-11-21 1971-12-28 Technicon Corp Continuous casting process
US3709648A (en) * 1970-11-27 1973-01-09 Bertrams Ag Hch Apparatus for the production of blocks from sodium hydroxide solution
US3730251A (en) * 1971-06-21 1973-05-01 Gen Motors Corp Method of continuous casting
US3731728A (en) * 1971-09-27 1973-05-08 Gen Motors Corp Mold apparatus for continuous casting
US3905418A (en) * 1973-11-26 1975-09-16 Technicon Instr Continuous casting apparatus with resilient graphitic sealing element
EP0142402A1 (de) * 1983-10-14 1985-05-22 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl
FR2583319A1 (fr) * 1985-05-23 1986-12-19 Proizv Ob Ura Lingotiere de machine pour la coulee continue de demi-produits.
DE4119987A1 (de) * 1991-06-18 1992-02-06 Hettstedt Walzwerk Ag Anfahrstrang fuer eine horizontale stranggiessanlage mit einem loesbaren anfahrkopf
US5228496A (en) * 1989-05-11 1993-07-20 Yoshida Kogyo K.K. Cast starting method in horizontal continuous casting

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1088171A (en) * 1913-01-30 1914-02-24 Adam Helmer Pehrson Manufacture of bar and tube shaped articles from molten metal.
US2779073A (en) * 1952-10-27 1957-01-29 Jr Harry B Osborn Receptacle for molten metal
FR1281701A (fr) * 1960-02-24 1962-01-12 United Steel Companies Ltd Perfectionnement apporté aux ajutages pour la coulée continue de métaux
US3040396A (en) * 1957-05-06 1962-06-26 Armco Steel Corp Apparatus and method for the direct casting of metal
US3045299A (en) * 1959-11-17 1962-07-24 Steigerwald Karl Heinz Reciprocating mold using a vacuum and pressure assist
DE1136796B (de) * 1957-04-10 1962-09-20 Schloemann Ag Kokille zum horizontalen Giessen von Straengen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1088171A (en) * 1913-01-30 1914-02-24 Adam Helmer Pehrson Manufacture of bar and tube shaped articles from molten metal.
US2779073A (en) * 1952-10-27 1957-01-29 Jr Harry B Osborn Receptacle for molten metal
DE1136796B (de) * 1957-04-10 1962-09-20 Schloemann Ag Kokille zum horizontalen Giessen von Straengen
US3040396A (en) * 1957-05-06 1962-06-26 Armco Steel Corp Apparatus and method for the direct casting of metal
US3045299A (en) * 1959-11-17 1962-07-24 Steigerwald Karl Heinz Reciprocating mold using a vacuum and pressure assist
FR1281701A (fr) * 1960-02-24 1962-01-12 United Steel Companies Ltd Perfectionnement apporté aux ajutages pour la coulée continue de métaux

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598174A (en) * 1967-07-28 1971-08-10 Martel Catala & Cie Ets Continuous casting installations
US3556197A (en) * 1968-02-05 1971-01-19 Kaiser Aluminium Chem Corp Apparatus for lubricating a molten metal mold
US3630266A (en) * 1969-11-21 1971-12-28 Technicon Corp Continuous casting process
US3709648A (en) * 1970-11-27 1973-01-09 Bertrams Ag Hch Apparatus for the production of blocks from sodium hydroxide solution
US3730251A (en) * 1971-06-21 1973-05-01 Gen Motors Corp Method of continuous casting
US3731728A (en) * 1971-09-27 1973-05-08 Gen Motors Corp Mold apparatus for continuous casting
US3905418A (en) * 1973-11-26 1975-09-16 Technicon Instr Continuous casting apparatus with resilient graphitic sealing element
EP0142402A1 (de) * 1983-10-14 1985-05-22 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl
FR2583319A1 (fr) * 1985-05-23 1986-12-19 Proizv Ob Ura Lingotiere de machine pour la coulee continue de demi-produits.
US5228496A (en) * 1989-05-11 1993-07-20 Yoshida Kogyo K.K. Cast starting method in horizontal continuous casting
DE4119987A1 (de) * 1991-06-18 1992-02-06 Hettstedt Walzwerk Ag Anfahrstrang fuer eine horizontale stranggiessanlage mit einem loesbaren anfahrkopf

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CH437661A (de) 1967-06-15

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