US3589429A - Method for continuous casting, cooling and shaping of metal bars - Google Patents

Method for continuous casting, cooling and shaping of metal bars Download PDF

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Publication number
US3589429A
US3589429A US782630A US3589429DA US3589429A US 3589429 A US3589429 A US 3589429A US 782630 A US782630 A US 782630A US 3589429D A US3589429D A US 3589429DA US 3589429 A US3589429 A US 3589429A
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US
United States
Prior art keywords
bar
zone
temperature
cooling
mold
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Expired - Lifetime
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US782630A
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English (en)
Inventor
Rudolf Schoffmann
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Voestalpine AG
Voest AG
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Voestalpine 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • This invention relates to a method of treating cast bars in 7 continuous casting plants outside of the mold, particularly cast bars which are shaped, e.g. cogged down, preceding or following the complete solidification thereof.
  • the melt cast into the cooled mold is first of all cooled to such an extent that a solidified marginal zone is formed.
  • the solidified marginal zone or skin layer of the bar is subjected to further cooling in a cooling zone provided with spray jets, during which cooling procedure the solidified marginal zone thickens gradually to form a completely solidified bar.
  • the marginal zone or skin layer being in direct contact with the cooling medium, is always colder than the inner portion of the bar, which retains a liquid core 'until the bar has solidified completely.
  • the present invention has as its object to avoid these disadvantages and difficulties and relates to a method of treating cast bars in continuous casting plants outside of the mold,'particularly cast bars which are shaped preceding or following the complete solidification thereof, said bars being led from the cooled mold into a cooling zone where they are treated with a cooling medium to obtain a substantially equal surface temperature, at most a decrease in temperature by approximately 200 C., said method'comprising leading the bar still containing a liquid core from the cooling zone into a subsequent uncooled, possibly heated, equalization zone, where the temperature of the inner portion of the bar causes an increase in the surface temperature thereof, said increased surface temperature being higher than the temperature prevailing upon entrance of the bar into the equalization zone.
  • the control operation known per se for the cooling procedure during which the surface temperature should not decrease by more than 200 C., is terminated prematurely, i.e. prior to complete solidification of the bar, and thus it is possible to equalize the differences in temperature and stress over the cross section of the bar before subjecting the bar to additional mechanical treatment, such as bending or cogging down.
  • the cooling procedure is terminated as soon as the bar has solidified over approximately 85-95 percent of its cross section.
  • the temperature of the skin layer is approximately 9501,000 C.
  • the temperature of the liquid core approximately l,500 C. This temperature of the liquid'core is sufficient to give off heat to the solidified marginal zone while passing the equalization zone to an extent which enables heating said marginal zone to a temperature of about l,l C. or slightly higher.
  • FIG. 1 is a diagrammatical view of the overall setup
  • FIG. 2 a diagram of the temperature behavior in core and skin layer
  • FIG. 3 shows the temperature distribution over the cross section of the bar.
  • numeral 1 denotes the cooled mold from where a cast bar with a thin solidified skin layer is delivered. Thus primary cooling takes place in the mold area.
  • Numeral 2 denotes the secondary cooling zone, where the bar is cooled from outside by means of spray jets. 3 is the place where the cooling procedure is terminated and the bar enters the equalization zone 4, said equalization zone ending at 5. With the equalization zone the temperature of the skin layer rises due to heat emission from the core being still liquid in part.
  • 6 and 6 denote a shaping plant, particularly a cogging down plant, following the equalization zone. Instead of said cogging down plant a straightening stand may be provided.
  • numeral 7 denotes the temperature behavior curve in the core and 8 the temperature behavior curve in the solidified skin layer. It is evident that the core temperature is essentially equal in both the secondary cooling zone 2 and the equalization zone 4, i.e. a temperature of l,500 C. is maintained decreasing slightly toward the end. Within the secondary cooling zone 2 the temperature of the skin layer decreases from approximately l,l00 to approximately 950 C., and within the equalization zone rises to about 1,100 C. due to absorption of heat yielded by the liquid core.
  • FIG. 3 illustrates the temperature distribution over the cross section of the bar.
  • the drawing shows a square bar 9, the inner core 10 of which is still liquid while the exterior region I] has already solidified.
  • Curve 12 illustrates the temperature distribution prevailing over the square bar cross section at the entrance into the equalization zone, i.e. in position 3 of the diagram shown in FIG. 1.
  • the temperature distribution at the end of the equalization zone, i.e. in position 5 of FIG. 1 is illustrated by the curve 13.
  • the temperature distribution in 5 would correspond to the curve 14.
  • the curves l2 and 13 on the one hand, and 12 and 14 on the other hand, it is seen that after passing the equalization zone the bar exhibits an evenly distributed temperature with the exception of a very. small area in the core.
  • the method of the invention secures an extensive equalization of temperature stresses, reduces the liability to crack formation in the course of further technological processing, such as bending and cogging down, following the continuous casting procedure, and improves the quality of the products.
  • a method of continuously casting a metal bar for subsequent shaping thereof comprising the steps of, casting molten metal in a cooled mold to form the continuous cast bar, subjecting said bar upon emergence from said mold to the action of a cooling medium controlled to effect a decrease in surface temperature of said bar of not more than about 200 C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • General Induction Heating (AREA)
  • Heat Treatment Of Articles (AREA)
US782630A 1968-05-29 1968-12-10 Method for continuous casting, cooling and shaping of metal bars Expired - Lifetime US3589429A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT513168A AT279072B (de) 1968-05-29 1968-05-29 Verfahren zur Behandlung von Gußsträngen in Stranggußanlagen außerhalb der Kokille

Publications (1)

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US3589429A true US3589429A (en) 1971-06-29

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US782630A Expired - Lifetime US3589429A (en) 1968-05-29 1968-12-10 Method for continuous casting, cooling and shaping of metal bars

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US (1) US3589429A (enrdf_load_html_response)
JP (1) JPS496974B1 (enrdf_load_html_response)
AT (1) AT279072B (enrdf_load_html_response)
CH (1) CH480893A (enrdf_load_html_response)
DE (1) DE1817277B1 (enrdf_load_html_response)
ES (1) ES360977A1 (enrdf_load_html_response)
FR (1) FR1598740A (enrdf_load_html_response)
GB (1) GB1238925A (enrdf_load_html_response)
HU (1) HU162504B (enrdf_load_html_response)
SE (1) SE344292B (enrdf_load_html_response)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771584A (en) * 1971-01-08 1973-11-13 Roblin Industries Method for continuously casting steel billet strands to minimize the porosity and chemical segregation along the center line of the strand
US5329779A (en) * 1993-02-09 1994-07-19 C.V.G. Siderurgica Del Orinoco, C.A. Method and apparatus for cooling workpieces
US5617735A (en) * 1995-04-12 1997-04-08 Danieli & C. Officine Meccaniche Spa Cooling chamber for rolled products
WO2003070399A1 (de) * 2002-02-22 2003-08-28 Sms Demag Aktiengesellschaft Verfahren und vorrichtung zum stranggiessen und unmittelbaren verformen eines metall-, insbesondere eines giessstrangs aus stahlwerkstoffen
US7192551B2 (en) 2002-07-25 2007-03-20 Philip Morris Usa Inc. Inductive heating process control of continuous cast metallic sheets
KR101018661B1 (ko) 2002-02-22 2011-03-04 에스엠에스 지마크 악티엔게젤샤프트 강 재료의 주조 빌렛을 연속 주조하여 직접 성형하는 방법 및 장치
EP3750649A4 (en) * 2018-03-29 2021-04-07 Maanshan Iron & Steel Co. Ltd. METHOD FOR CONTROLLING THE STRUCTURE OF A SOLID CAST BLOCK DURING CONTINUOUS CASTING AND CONTROL DEVICE FOR THIS

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766962A (en) * 1971-02-01 1973-10-23 I Rossi Method of continuously casting a slab
US4232727A (en) * 1978-11-01 1980-11-11 Kennecott Copper Corporation Method and apparatus for the continuous production of strip
DE3606507A1 (de) * 1986-02-28 1987-09-10 Mannesmann Ag Verfahren zum erzeugen von walzvormaterial durch stranggiessen fuer langprodukte aus metall, insbesondere aus stahl

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565959A (en) * 1949-10-04 1951-08-28 Charles B Francis Method of casting metal continuously
US2698467A (en) * 1950-06-05 1955-01-04 Edward W Osann Jr Method and apparatus for the continuous casting of metal
US3315349A (en) * 1965-10-20 1967-04-25 Southwire Co Method of producing hot-formed copper-base products
US3333452A (en) * 1965-03-03 1967-08-01 Sendzimir Inc T Reduction of thick flat articles
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3491823A (en) * 1966-04-22 1970-01-27 Boehler & Co Ag Geb Process for the manufacture of continuous castings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE807311C (de) * 1949-06-28 1952-02-21 Ver Leichtmetallwerke Gmbh Verfahren zum Stranggiessen von hochschmelzenden Metallen, insbesondere von Staehlen
AT183182B (de) * 1952-09-29 1955-09-10 Boehler & Co Ag Geb Verfahren zur Kühlung des Gußstranges von Stranggußanlagen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565959A (en) * 1949-10-04 1951-08-28 Charles B Francis Method of casting metal continuously
US2698467A (en) * 1950-06-05 1955-01-04 Edward W Osann Jr Method and apparatus for the continuous casting of metal
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3333452A (en) * 1965-03-03 1967-08-01 Sendzimir Inc T Reduction of thick flat articles
US3315349A (en) * 1965-10-20 1967-04-25 Southwire Co Method of producing hot-formed copper-base products
US3491823A (en) * 1966-04-22 1970-01-27 Boehler & Co Ag Geb Process for the manufacture of continuous castings

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771584A (en) * 1971-01-08 1973-11-13 Roblin Industries Method for continuously casting steel billet strands to minimize the porosity and chemical segregation along the center line of the strand
US5329779A (en) * 1993-02-09 1994-07-19 C.V.G. Siderurgica Del Orinoco, C.A. Method and apparatus for cooling workpieces
DE4403759A1 (de) * 1993-02-09 1994-08-18 Orinoco Siderurgica Verfahren und Vorrichtung zum Kühlen von Werkstücken
US5617735A (en) * 1995-04-12 1997-04-08 Danieli & C. Officine Meccaniche Spa Cooling chamber for rolled products
US20070023161A1 (en) * 2002-02-22 2007-02-01 Axel Weyer Method and device for the continuous casting and direct deformation of a metal strand, especially a cast steel strand
US20050011629A1 (en) * 2002-02-22 2005-01-20 Axel Weyer Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand
US7121323B2 (en) 2002-02-22 2006-10-17 Sms Demag Ag Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand
CN1293966C (zh) * 2002-02-22 2007-01-10 Sms迪马格股份公司 用于金属坯、尤其是钢材连铸金属坯的连铸和直接成型的方法和装置
WO2003070399A1 (de) * 2002-02-22 2003-08-28 Sms Demag Aktiengesellschaft Verfahren und vorrichtung zum stranggiessen und unmittelbaren verformen eines metall-, insbesondere eines giessstrangs aus stahlwerkstoffen
RU2302313C2 (ru) * 2002-02-22 2007-07-10 Смс Демаг Акциенгезелльшафт Способ и устройство для непрерывной разливки с непосредственным обжатием металлической заготовки, в частности стальной заготовки
US7849911B2 (en) * 2002-02-22 2010-12-14 Sms Siemag Aktiengesellschaft Method and device for the continuous casting and direct deformation of a metal strand, especially a cast steel strand
KR101018661B1 (ko) 2002-02-22 2011-03-04 에스엠에스 지마크 악티엔게젤샤프트 강 재료의 주조 빌렛을 연속 주조하여 직접 성형하는 방법 및 장치
US7192551B2 (en) 2002-07-25 2007-03-20 Philip Morris Usa Inc. Inductive heating process control of continuous cast metallic sheets
US20070116591A1 (en) * 2002-07-25 2007-05-24 Philip Morris Usa Inc. Inductive heating process control of continuous cast metallic sheets
US7648596B2 (en) 2002-07-25 2010-01-19 Philip Morris Usa Inc. Continuous method of rolling a powder metallurgical metallic workpiece
EP3750649A4 (en) * 2018-03-29 2021-04-07 Maanshan Iron & Steel Co. Ltd. METHOD FOR CONTROLLING THE STRUCTURE OF A SOLID CAST BLOCK DURING CONTINUOUS CASTING AND CONTROL DEVICE FOR THIS

Also Published As

Publication number Publication date
CH480893A (de) 1969-11-15
AT279072B (de) 1970-02-25
GB1238925A (enrdf_load_html_response) 1971-07-14
JPS496974B1 (enrdf_load_html_response) 1974-02-18
FR1598740A (enrdf_load_html_response) 1970-07-06
HU162504B (enrdf_load_html_response) 1973-02-28
DE1817277B1 (de) 1970-11-05
SE344292B (enrdf_load_html_response) 1972-04-10
ES360977A1 (es) 1970-08-01

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