US3491823A - Process for the manufacture of continuous castings - Google Patents

Process for the manufacture of continuous castings Download PDF

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Publication number
US3491823A
US3491823A US586494A US3491823DA US3491823A US 3491823 A US3491823 A US 3491823A US 586494 A US586494 A US 586494A US 3491823D A US3491823D A US 3491823DA US 3491823 A US3491823 A US 3491823A
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US
United States
Prior art keywords
strand
working
liquid core
cross
rollers
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
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US586494A
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English (en)
Inventor
Bruno Tarmann
Heinrich Vonbank
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.)
Gebrueder Boehler and Co AG
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Gebrueder Boehler and Co 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.)
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Publication date
Application filed by Gebrueder Boehler and Co AG filed Critical Gebrueder Boehler and Co AG
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Publication of US3491823A publication Critical patent/US3491823A/en
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B1/026—Rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing

Definitions

  • This invention relates generally to a method of continuous casting of molten metals, and in particular of nonalloyed and alloyed steels.
  • the working process according to this invention can be carried out with the existing working installations for working strands, which are suitable for reduction of the cross-section of materials. It is preferred that the working is effected by means of rollers.
  • the rollers of the driving installation in a continuous casting processing machine have been found suitable for carrying out the process step of this invention.
  • the rollens of the driving installation may have the usual diameter that is prevalent in rolling mills of the described character. It has been found to be particularly advantageous to use grooved rollers in the fabrication of square and round strands.
  • the continuously cast strand which has been worked in accordance with the process of this invention has, after working, still a sufiiciently high temperature so that, if necessary, it can by means of the usual known steps be further deformed into the desired shapes and dimensions.
  • the prevailing thickness of the strand shell i.e., of the liquid core
  • the working process according to this invention should be effected with steels having a large solidification period with a liquid core having a thickness near the upper limit of the thickness range, whereas with steels having a small solidification period the working process should be effected near the lower limit of the thickness range of 5 to 30 mm. of the liquid core.
  • the correct liquid core length can always be obtained by adjusting the rate of pouring of the molten metal or by adjusting the cooling rate of the strand.
  • the determination of the required size of the worked over area of the hardened strand crosssection can be obtained without difficulty, because the cross-sectional portion of the liquid core can be calculated as well as the prevailing thickness of the liquid core.
  • the liquid core point is positioned upstream from that plane in which the strand attains, due to the working thereof, its final cross-sectional configuration, it is only necessary to select such a large degree of deformation that it exceeds the cross-sectional portion of the liquid core. It has been found that strands of pronouncedly improved qualities can be obtained when the total cross-sectional area reduction during the working process of this invention is at least 20%.
  • FIG. 1 is an elevated view of an installation for performing the process according to this invention
  • FIG. 2 is a view of the longitudinal section through the strand passing the pair of rollers 5 in FIG. 1.
  • FIG. 1 there is shown an open ended reciprocating mold 1 in which the partial solidified strand 4 is formed.
  • the strand emerging from the mold passes the cooling device 2, consisting of series of water sprays, and then runs through the insulated chamber 3, designed to reduce the temperature gradient of the solidified portion of the strand.
  • the insulated chamber is followed by 4 pairs of rollers 5, 6, 7 and 8, which are employed for the reduction of the cross-section of the strand.
  • the strand If the strand is withdrawn from the mold at a speed of 1.8 111. per minute, it enters the first pair of rollers with a liquid core of 22 mm. in thickness. Passing the four pairs of rollers the strand is reduced to cross-sections of 150 x 95 mm. in the first, to 100 X 107 mm. in the second, to 110 X 72 mm. in the third, and to 80 mm. square in the fourth pair of rollers.
  • the process of the invention is performed by the first pair of rollers 5, by means of which the cross-section area of the strand is reduced by about 32 percent, and whereby the reduction of the cross-section area of the solidified portion of the strand amounts to about 30 percent.
  • the liquid core 9 ends far before the center plane of the two rollers 5.
  • the improvement comprising the step of working that portion of the hardened strand in which the liquid core thereof has a thickness of 5 to 30 mm., independent from the size of the cross-sectional area thereof, in such a way that the end of the core is formed upstream from the plane in which said strand attains its final cross-sectional configuration due to said working, the cross-section of said hardened strand being reduced by at least 20% by means of said working step thereby welding together the hardened strand shell so as to form a solid cross-section upstream from the transverse axis of said working installation.
  • rollers are of standard diameter and are operatively mounted in a driving arrangement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US586494A 1966-04-22 1966-10-13 Process for the manufacture of continuous castings Expired - Lifetime US3491823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT378666A AT266362B (de) 1966-04-22 1966-04-22 Verfahren und Vorrichtung zur Herstellung von streckverformten Erzeugnissen aus hochschmelzenden Metallen, insbesondere aus unlegierten oder legierten Stählen mit verbesserten Qualitätseigenschaften

Publications (1)

Publication Number Publication Date
US3491823A true US3491823A (en) 1970-01-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US586494A Expired - Lifetime US3491823A (en) 1966-04-22 1966-10-13 Process for the manufacture of continuous castings

Country Status (6)

Country Link
US (1) US3491823A (de)
AT (1) AT266362B (de)
CH (1) CH456861A (de)
ES (1) ES339500A1 (de)
GB (1) GB1189731A (de)
SE (1) SE309091B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554269A (en) * 1969-08-21 1971-01-12 Demag Ag Method of deforming and straightening a curved continuous casting strand
US3589429A (en) * 1968-05-29 1971-06-29 Voest Ag Method for continuous casting, cooling and shaping of metal bars
US3678571A (en) * 1969-05-09 1972-07-25 Voest Ag Method for the production of sheets
US3710436A (en) * 1969-05-09 1973-01-16 Voest Ag Method for the production of plates
US3747664A (en) * 1970-09-04 1973-07-24 Voest Ag Process for the treatment of cast bars in continuous casting plants
US3974559A (en) * 1973-03-26 1976-08-17 Nippon Kokan Kabushiki Kaisha Continuous casting process
US4817703A (en) * 1986-11-06 1989-04-04 Sms Schloemann-Siemag Aktiengesellschaft Strip casing unit with downstream multi-stand continuous rolling mill
US4962808A (en) * 1988-07-14 1990-10-16 Thyssen Stahl Aktiegesellschaft Method of producing a steel strip having a thickness of less than 10 mm
AU620419B2 (en) * 1988-07-14 1992-02-20 Thyssen Stahl Aktiengesellschaft Method of producing a steel strip having a thickness of less than 10 mm
US5303766A (en) * 1991-03-22 1994-04-19 Hoogovens Groep B.V. Apparatus and method for the manufacture of hot-rolled steel
US5339887A (en) * 1991-09-19 1994-08-23 Sms Schloemann-Siemag Aktiengesellschaft Process for production of steel strip
US5771560A (en) * 1995-08-02 1998-06-30 Danieli & C. Officine Meccaniche Spa Method for the continuous casting of long products and relative continuous casting line
US20030213578A1 (en) * 2002-04-08 2003-11-20 Sei Hiraki Continuous casting method, continuous casting apparatus and continuously cast steel slab
US20160096219A1 (en) * 2013-06-20 2016-04-07 Nippon Steel & Sumitomo Metal Corporation Method for continuously casting slab
EP3750649A4 (de) * 2018-03-29 2021-04-07 Maanshan Iron & Steel Co. Ltd. Verfahren zur steuerung der struktur eines erstarrten gussblocks beim stranggiessen und steuerungsvorrichtung dafür

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US705721A (en) * 1900-04-28 1902-07-29 Johan Otto Emanuel Trotz Apparatus for casting ingots in continuous long lengths.
FR58498E (fr) * 1948-07-27 1953-11-30 Procédé et dispositifs pour la fabrication continue, par coulée et laminage direct, de produits métalliques profilés ou autres
AT187251B (de) * 1953-07-04 1956-10-25 Mannesmann Ag Verfahren zum Stranggießen lunkerfreier Stränge aus verformbaren Metallen
US3147521A (en) * 1961-08-10 1964-09-08 Boehm Arnold Henry Continuous casting and forming process
US3237251A (en) * 1961-11-03 1966-03-01 Concast Ag Method and a device for continuous casting
US3307230A (en) * 1963-05-09 1967-03-07 Oglebay Norton Co Continuous casting apparatus with positive drive oscillating means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US705721A (en) * 1900-04-28 1902-07-29 Johan Otto Emanuel Trotz Apparatus for casting ingots in continuous long lengths.
FR58498E (fr) * 1948-07-27 1953-11-30 Procédé et dispositifs pour la fabrication continue, par coulée et laminage direct, de produits métalliques profilés ou autres
AT187251B (de) * 1953-07-04 1956-10-25 Mannesmann Ag Verfahren zum Stranggießen lunkerfreier Stränge aus verformbaren Metallen
US3147521A (en) * 1961-08-10 1964-09-08 Boehm Arnold Henry Continuous casting and forming process
US3237251A (en) * 1961-11-03 1966-03-01 Concast Ag Method and a device for continuous casting
US3307230A (en) * 1963-05-09 1967-03-07 Oglebay Norton Co Continuous casting apparatus with positive drive oscillating means

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589429A (en) * 1968-05-29 1971-06-29 Voest Ag Method for continuous casting, cooling and shaping of metal bars
US3678571A (en) * 1969-05-09 1972-07-25 Voest Ag Method for the production of sheets
US3710436A (en) * 1969-05-09 1973-01-16 Voest Ag Method for the production of plates
US3554269A (en) * 1969-08-21 1971-01-12 Demag Ag Method of deforming and straightening a curved continuous casting strand
US3747664A (en) * 1970-09-04 1973-07-24 Voest Ag Process for the treatment of cast bars in continuous casting plants
JPS5125413B1 (de) * 1970-09-04 1976-07-30
US3974559A (en) * 1973-03-26 1976-08-17 Nippon Kokan Kabushiki Kaisha Continuous casting process
US4817703A (en) * 1986-11-06 1989-04-04 Sms Schloemann-Siemag Aktiengesellschaft Strip casing unit with downstream multi-stand continuous rolling mill
US4962808A (en) * 1988-07-14 1990-10-16 Thyssen Stahl Aktiegesellschaft Method of producing a steel strip having a thickness of less than 10 mm
AU620419B2 (en) * 1988-07-14 1992-02-20 Thyssen Stahl Aktiengesellschaft Method of producing a steel strip having a thickness of less than 10 mm
US5303766A (en) * 1991-03-22 1994-04-19 Hoogovens Groep B.V. Apparatus and method for the manufacture of hot-rolled steel
US5339887A (en) * 1991-09-19 1994-08-23 Sms Schloemann-Siemag Aktiengesellschaft Process for production of steel strip
US5771560A (en) * 1995-08-02 1998-06-30 Danieli & C. Officine Meccaniche Spa Method for the continuous casting of long products and relative continuous casting line
US20030213578A1 (en) * 2002-04-08 2003-11-20 Sei Hiraki Continuous casting method, continuous casting apparatus and continuously cast steel slab
EP1356880A3 (de) * 2002-04-08 2005-03-16 Sumitomo Metal Industries, Ltd. Verfahren und Vorrichtung zum Stranggiessen, sowie durch dieses Verfahren hergestellter Stahlbramme
US7086450B2 (en) 2002-04-08 2006-08-08 Sumitomo Metal Industries, Ltd. Continuous casting method, continuous casting apparatus and continuously cast steel slab
US20160096219A1 (en) * 2013-06-20 2016-04-07 Nippon Steel & Sumitomo Metal Corporation Method for continuously casting slab
US9409229B2 (en) * 2013-06-20 2016-08-09 Nippon Steel & Sumitomo Metal Corporation Method for continuously casting slab
EP3750649A4 (de) * 2018-03-29 2021-04-07 Maanshan Iron & Steel Co. Ltd. Verfahren zur steuerung der struktur eines erstarrten gussblocks beim stranggiessen und steuerungsvorrichtung dafür

Also Published As

Publication number Publication date
AT266362B (de) 1968-11-11
CH456861A (de) 1968-05-31
SE309091B (de) 1969-03-10
ES339500A1 (es) 1968-07-16
GB1189731A (en) 1970-04-29

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