US3776295A - Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification - Google Patents

Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification Download PDF

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Publication number
US3776295A
US3776295A US00210712A US3776295DA US3776295A US 3776295 A US3776295 A US 3776295A US 00210712 A US00210712 A US 00210712A US 3776295D A US3776295D A US 3776295DA US 3776295 A US3776295 A US 3776295A
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United States
Prior art keywords
mold
liquefied gas
metal
casting
liquid metal
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Expired - Lifetime
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US00210712A
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English (en)
Inventor
M Mola
J Galey
P Barthelemy
G Bentz
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ETUDES DE CENTRIFUGATION
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ETUDES DE CENTRIFUGATION
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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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/116—Refining the metal
    • B22D11/117—Refining the metal by treating with gases
    • 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
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/144—Plants for continuous casting with a rotating mould

Definitions

  • hollow round castings be produced by introducing liquid metal into a rotating mold which is provided with a central mandrel so as to simultaneously form two solid concentric metallic skins between which the tubular casting is formed.
  • the inner skin of the tubular casting has defects which are due to inclusions of slag or other impurities near this skin, and which are very undesirable when a steel tube of high quality is to be made.
  • This invention relates to a process which makes it possible to improve the quality of metallic castings either in their central portions when the castings are solid, or near their inner skins in the case of hollow castings.
  • the mold, the casting being manufactured, and the liquid metal being solidified are simultaneously rotated about a vertical axis, preferably at the same speed.
  • the mold and the solidified portion of the casting are not rotated, in contradistinction to the metal which has not yet been solidified, which is rotated by the impact of the jet of liquid metal on the unsolidified upper part of the casting and/or by a rotating electromagnetic field induced in the unsolidiinvention liquefied gas is applied to the surface of the metal while it is solidifying at a point to which the liquid metal is brought as a consequence of the rotation of the mold after it has been introduced into the mold.
  • the liquid metal is brought to an eccentric position with respect to the mold by directing the jet of metal in the direction of rotation of the mold, and the liquefied gas input is also eccentrically positioned downstream of the liquid metal input with respect to the direction of rotation of the mold.
  • the quantity of liquefied gas which, according to the invention, may be directed against the surface of the bath of liquid metal may vary within wide limits. It depends especially on the diameter of the mold in which the metal is being solidified.
  • the maximum suitable supply of liquefied gas corresponds to the quantity which it is possible to introduce without disturbing the surface of the bath of liquid metal, and in particular without producing bubbles on that surface.
  • the minimum quantity of liquefied gas which must be supplied to the surface of the liquid bath may be estimated by determining the moment at which the black fumes which result from the introduction of lubricating oil into the mold cease to become visible.
  • the liquefied gas is introduced at a point in the mold which is downstream, with respect to the direction of rotation,
  • the introduction of liquefied gas according to the invention also has the effect of considerably reducing the quantity of slag and other impurities which are normally brought to the surface of the liquid bath.
  • the process according to the invention makes it possible to obtain castings of better quality substantially free from the defects which, in conventional processes, occur in the central part of solid castings or in the internal surfaces of hollow castings.
  • the fact that the process is applied to a continuous rotating casting makes it possible to obtain excellent distribution of the liquefied gas at the moment it comes in contact with the surface of the bath and impart the best quality to the casting in the course of formation.
  • the device comprises three pouring spouts arranged in the following order with respect to the direction of rotation:
  • a spout for supplying liquid metal for supplying liquid metal
  • a spout for supplying liquefied gas for supplying lubricating oil to the mold.
  • FIG. 1 is a schematic view, partially in section, showing a device for use in carrying out the invention
  • FIG. 2 is a top plan view of the device shown in FIG.
  • FIG. 3 is a sectional view taken along the line III-III of FIG. 4, showing another embodiment of the invention for use in casting hollow articles;
  • FIG. 4 is a top plan view of the device shown in FIG. 3.
  • FIG. 1 schematically shows a mold l which is cooled by water circulating in the space 2, and within which the solid cylindrical casting 3 is beginning to solidify.
  • FIG. 1 also schematically shows the means for spraying water 4, which cools the casting once it has dropped below the bottom of the mold 1.
  • FIG. 1 schematically shows the extracting rollers S, which draw the casting down, and are rotated about their own axes and about the axis of the casting at the same speed as the mold rotates, as is also schematically indicated on the drawing by arrows.
  • a nozzle 6 projects a jet of liquid steel onto the upper surface of the casting at a point which is eccentric with respect to its axis.
  • the drawing also shows the cooled duct 8 which supplies the liquefied gas in the form of a small jet 9.
  • FIG. 2 shows the members which are situated at the top of FIG. 1 including the supply spouts for the liquid steel 7, on the one hand, and the liquefied gas 9, on the other hand, and finally the lubricating oil 11 are, in the preferred embodiment of the invention, directed in the direction of rotation of the mold, and are so positioned the jet of metal is upstream, whereas the jet of lubricating oil is downstream, with respect to the jet of liquefied gas.
  • a mold 2 which has an internal diameter of mm and produces in a continuous manner a solid steel casting having substantially the same diameter, which is drawn downwardly at a linear speed which may be between 1.8 meters and 2.20 meters per minute.
  • a supply of liquefied nitrogen is introduced through the duct 8 at the rate of between 0.3 and 0.5 liters per minute. It suffices to supply rape oil at a rate of the order of 5 to 6 cm per minute, which corresponds to substantially half the quantity which is necessary if no liquid nitrogen is used in accordance with the invention.
  • FIGS. 3 and 4 show the parts corresponding to those shown in FIGS. 1 and 2 respectively, in the case of a device for pouring hollow castings 3'.
  • the spouts supplying liquid metal liquefied gas and lubricant are also shown and distributed at substantially regular intervals about the periphery of the mold.
  • a mandrel 12 which is also rotated about its vertical axis by means not shown, and
  • This device makes it possible to provide at the level of the mold two skins of concentric solidified metal between which the liquid metal constituting the hollow casting becomes solidified.
  • the other characteristics of the embodiment which has been hereinbefore described are also found in this embodiment.
  • the apparatus according to the invention makes it possible to produce metallic castings and in particular steel castings which have particularly satisfactory internal surfaces.
  • the process according to the invention may also be applied to all metals or alloys having similar general characteristics, in particular similar characteristics with respect to its temperature and conditions of solidification.
  • Method for the continuous rotary casting of metallic articles by introducing a jet of liquid metal into the top of a cooled mold within which the unsolidified metal rotates about a vertical axis while the casting is vertically downwardly extracted, which comprises the step of introducing a liquefied gas which is inert with respect to the metal at the top of the mold adjacent the surface of the liquid metal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US00210712A 1970-12-24 1971-12-22 Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification Expired - Lifetime US3776295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR707046640A FR2118867B1 (zh) 1970-12-24 1970-12-24

Publications (1)

Publication Number Publication Date
US3776295A true US3776295A (en) 1973-12-04

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US00210712A Expired - Lifetime US3776295A (en) 1970-12-24 1971-12-22 Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification

Country Status (9)

Country Link
US (1) US3776295A (zh)
JP (1) JPS5310531B1 (zh)
AU (1) AU459852B2 (zh)
CA (1) CA959624A (zh)
DE (1) DE2163928C3 (zh)
FR (1) FR2118867B1 (zh)
GB (1) GB1372860A (zh)
IT (1) IT944283B (zh)
SE (1) SE384330B (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205715A (en) * 1977-05-18 1980-06-03 Institut De Recherches De La Siderurgie Francaise Method of continuous centrifugally casting of metal strands of non-circular cross-section
US4211269A (en) * 1977-06-01 1980-07-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'expoitation Des Procedes Georges Claude Method of centrifugally casting metal under an inert atmosphere
US4287933A (en) * 1977-11-04 1981-09-08 Korf-Stahl Ag Continuous casting method with rotary melt movement
WO2018161156A1 (en) * 2017-03-10 2018-09-13 8617490 Canada Inc. Tubular shape casting apparatus
US11085097B2 (en) 2016-08-31 2021-08-10 Xi'an University Of Technology Self-lubricating rolling bearing and preparation method therefor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329383A1 (fr) * 1975-11-03 1977-05-27 Siderurgie Fse Inst Rech Procede de coulee continue centrifuge electrorotative de produits ronds
FR2338756A1 (fr) * 1976-01-20 1977-08-19 Creusot Loire Procede de coulee continue de metaux, notamment d'acier, dispositif pour sa mise en oeuvre et ebauche d'acier obtenue par ce procede
DE2609065A1 (de) * 1976-03-05 1977-09-15 Arbed Verfahren zur qualitativen verbesserung von stranggussmaterial aus beruhigten stahlqualitaeten
CH611189A5 (zh) * 1976-12-28 1979-05-31 Belipar Sa
CH609263A5 (en) * 1976-12-28 1979-02-28 Concast Ag Method for the continuous casting of steel
AU516491B2 (en) * 1978-11-06 1981-06-04 Nippon Steel Corporation Continuous casting
FR2574328B1 (fr) * 1984-12-07 1987-01-09 Pont A Mousson Dispositif d'alimentation rotative en fonte liquide d'une installation de coulee continue verticale d'un tuyau en fonte a graphite speroidal
CN110926220A (zh) * 2019-12-11 2020-03-27 四川德胜集团钒钛有限公司 一种加热炉出炉地辊冷却结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH308044A (de) * 1950-09-05 1955-06-30 Junghans Siegfried Dr Ing E H Verfahren zum Giessen von Metallen und Anlage zu seiner Ausübung.
US2963758A (en) * 1958-06-27 1960-12-13 Crucible Steel Co America Production of fine grained metal castings
CH439602A (fr) * 1964-09-04 1967-07-15 Etudes De Centrifugation Procédé pour fabriquer, par coulée continue et à l'aide d'un moule refroidi, des barres cylindriques métalliques
US3395750A (en) * 1965-09-01 1968-08-06 United States Steel Corp Apparatus for displacing scum in continuous casting molds
US3545529A (en) * 1968-03-29 1970-12-08 United States Steel Corp Apparatus for maintaining a special atmosphere above a casting mold

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH308044A (de) * 1950-09-05 1955-06-30 Junghans Siegfried Dr Ing E H Verfahren zum Giessen von Metallen und Anlage zu seiner Ausübung.
US2963758A (en) * 1958-06-27 1960-12-13 Crucible Steel Co America Production of fine grained metal castings
CH439602A (fr) * 1964-09-04 1967-07-15 Etudes De Centrifugation Procédé pour fabriquer, par coulée continue et à l'aide d'un moule refroidi, des barres cylindriques métalliques
US3395750A (en) * 1965-09-01 1968-08-06 United States Steel Corp Apparatus for displacing scum in continuous casting molds
US3545529A (en) * 1968-03-29 1970-12-08 United States Steel Corp Apparatus for maintaining a special atmosphere above a casting mold

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205715A (en) * 1977-05-18 1980-06-03 Institut De Recherches De La Siderurgie Francaise Method of continuous centrifugally casting of metal strands of non-circular cross-section
US4211269A (en) * 1977-06-01 1980-07-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'expoitation Des Procedes Georges Claude Method of centrifugally casting metal under an inert atmosphere
US4287933A (en) * 1977-11-04 1981-09-08 Korf-Stahl Ag Continuous casting method with rotary melt movement
US11085097B2 (en) 2016-08-31 2021-08-10 Xi'an University Of Technology Self-lubricating rolling bearing and preparation method therefor
WO2018161156A1 (en) * 2017-03-10 2018-09-13 8617490 Canada Inc. Tubular shape casting apparatus
US10946438B2 (en) 2017-03-10 2021-03-16 8617490 Canada Inc. Tubular shape casting apparatus

Also Published As

Publication number Publication date
DE2163928A1 (de) 1972-07-13
GB1372860A (en) 1974-11-06
SE384330B (sv) 1976-05-03
DE2163928B2 (de) 1975-01-30
FR2118867B1 (zh) 1974-02-15
AU3723871A (en) 1973-06-28
FR2118867A1 (zh) 1972-08-04
IT944283B (it) 1973-04-20
CA959624A (en) 1974-12-24
AU459852B2 (en) 1975-04-10
DE2163928C3 (de) 1975-09-18
JPS5310531B1 (zh) 1978-04-14

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