US3710841A - Method for casting and rolling of metal stands from the casting heat - Google Patents

Method for casting and rolling of metal stands from the casting heat Download PDF

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Publication number
US3710841A
US3710841A US00886518A US3710841DA US3710841A US 3710841 A US3710841 A US 3710841A US 00886518 A US00886518 A US 00886518A US 3710841D A US3710841D A US 3710841DA US 3710841 A US3710841 A US 3710841A
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US
United States
Prior art keywords
casting
rod
section
cross
mold
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Expired - Lifetime
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US00886518A
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English (en)
Inventor
H Baumann
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Mannesmann Demag AG
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Demag AG
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Publication date
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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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/22—Hinged chocks

Definitions

  • a method and apparatus for continuously casting metal in particular, steel rods includes a continuous casting mold in which the rod is continuously cast and cooled to solidification as it is passed through the mold and moved through a transport path.
  • the rod which is cast is subjected to a first set of up setting rolls and straightening rolls for reducing its cross section and for causing a stretching of the rod and a second set of high deformation rolls for further reducing the cross section and stretching the rod which is formed.
  • the construction is characterized by an arrangement of the first acting sets of rollers at a first station to produce such a rod reduction and a rod stretching that the second acting rollers at the second station attain a maximum degree of deformation and at a faster passage rate of the rod which is cast and which therefore also requires a lower rolling force.
  • the apparatus includes a roll stand for deforming the casting at a high reduction per pass which is preceeded by a roll stand having a roll gap which in the set in dependence upon the ratio of the casting cross section at the mold and the smallest possible rolling gap of the high deformation rollers.
  • the construction is such that the casting cross section of the mold has a side ratio greater than 1 and the upsetting gap of the first roller set of approximately 1 and that of the high deformation stand of 1 or less than 1.
  • the side ratio is the relationship of the side lengths with one another.
  • This invention relates in general to a method and apparatus for continuous casting and in particular to a new and useful method and apparatus in which the cast metal is subjected to a cross sectional reduction and stretching at a first station by upsetting rollers and straightening rollers and at a second station by a high deformation roller.
  • the invention is concerned in particular with the favorable arrangement for the casting and rolling of a continuous cast rod such as a steel rod which is formed by metal which is poured into a continuously operating casting mold and in which the rod is withdrawn; and during withdrawal, or directly adjacent the casting mold, the rod is subjected to cooling and solidification and thereafter to several deformation actions for reducing its cross section and causing a stretching.
  • a continuous cast rod such as a steel rod which is formed by metal which is poured into a continuously operating casting mold and in which the rod is withdrawn; and during withdrawal, or directly adjacent the casting mold, the rod is subjected to cooling and solidification and thereafter to several deformation actions for reducing its cross section and causing a stretching.
  • Such a rolling mill train for 5 horizontal and 5 vertical stands would have to be provided for each casting vein.
  • a bloom of the dimensions of 250 by 250 mm would be tapped.
  • the stands must be arranged alternately, horizontally and vertically.
  • the end cross section of the rolled material is 70 by 70 mm.
  • the output attained thereby is 235 tons per hour or 1,680,000 tons per year and a rolling speed of v 3.5 meters per second.
  • the method at the same time increases the yield in comparison with conventional installations and also achieves advantages of the installation design obviating the mentioned disadvantages of spacial restriction.
  • a method is proposed whereby the quantity of casting metal per unit of time is maintained at a maximum at a certain cross section formation and cooling output is arranged in conformity thereto and the metal being cast is then shaped with a maximum reduction per shaping pass.
  • the rolling force required for the shaping of the metal is supplied in only two stations, the first providing a cross section reduction which causes such a stretching at the second station, that there is attained a maximum degree of deformation at a faster passage rate of the casting material but at a relatively smaller rolling force.
  • the rolling force which for optimum deformation of the casting cannot be supplied by the high deformation machine alone is therefore made available in preceeding station so that the following high deformation operation can just take place.
  • Another advantage of the combination of pre-and after-deformation resides in the upsetting of the casting, that is, in an introductory transformation of the casting structure to a rolling texture.
  • the apparatus for carrying out the method is charac terized by a roll stand for deforming the casting which operates to effect a high reduction per pass and which is preceeded by a roll stand whose rolling gap between rollers is set in an independent ratio in respect to the cross section of the cast metal at the casting mold and also in respect to the smallest possible rolling gap which can be attained at the high deformation stand.
  • a further object of the invention is to provide a continuous casting apparatus which includes a first station with upsetting and straightening rollers arranged to engage the continuous casting in a condition of casting heat, and a second station spaced from the first station having high deformation rollers arranged with a relatively small roll gap, and wherein the casting cross section advantageously has a side ratio greater than I and the upsetting roll gap at the first station, a side ratio of I, and that of the at the high deformation second station a side ratio of l or less than 1.
  • a further object of the invention is to provide a continuous casting device which is simple in design, rugged in construction, and economical to manufacture.
  • FIGURE of the drawing is a schematic side elevational view of a continuous casting and rolling device constructed in accordance with the invention.
  • the invention embodied therein comprises a combined continuous casting and rolling device which includes a continuous casting ladle or distributor trough 1 from which liquid steel or other metal flows into a continuous casting mold 2 in the form of a freely falling jet or in a jet guided in one or more immersion tubes.
  • the mold 2 is made to oscillate in the casting direction in a known manner in order to bring about a favorable heat transfer between the casting material and the wall plates of the mold 2.
  • the liquid portion 3 of the casting 4 need not extend into the region of the horizontal but may cool off with the aid of electrical or flow caused forces (not shown) in the manner illustrated in the drawing to cause solidification just behind the mold 2.
  • the casting 4 is supported or moved by transport or feed rolls 5 and the movement may be entirely vertically or in a curve as indicated in the drawing into the region of the horizontal portion 6.
  • the resulting structure of the casting material comprises a casting structure.
  • the transport rolls 5 cause a more or less proportional force and provisions are generally made only to feed the casting away from the mold 2 and to transport it to the cooling section without causing any material changes in the cast structure and without internal or external damage thereto.
  • the cross section 8 of the casting will thus be maintained from the mold 2 up to a first station 50 for reducing the cross section and stretching the rod.
  • the first station 50 includes a pair of upsetting rollers 9, 9' which are mounted in a roll stand having roller pressure adjustment means 11.
  • a single pair of additional straightening rollers 10, 10 are located on extensions 54, 54 of the stand 52.
  • the roll path 9, 9 and 10, 10' may have identical or differently acting diameters.
  • the upsetting rolls 9, 9' can be pressed against the casting with considerable expenditure of force by means of the adjusting means 11 to a degree which brings about the destruction of the casting structure in external regions.
  • the straightening rolls 10, 10' are only adjustable in respect to the casting and are not driven.
  • the upsetting rolls 9, 9' produce besides their pressing efi'ect a required tensile or braking effect.
  • the casting 4 is thus pressed and brought to a certain density behind the upsetting rolls 9, 9' and then is moved into a high deformation machine generally designated 56.
  • the high deformation machine 56 includes mounting frames l2, 12 arranged on respective opposite sides of the casting and each of which carries supporting rolls 13 and working rolls 14.
  • An eccentric drive 15 and its associate linkage 58 provides a control for the positioning of the deformation rollers l4, 14'.
  • An upsetting rather than a stretching effect is produced on the casting 4 but at the exit of the high deformation machine 56 these forces work as pure stretching forces.
  • a reaction resulting therefrom which causes a temporary regulation of the stress ratio can readily be absorbed by the two or more upsetting roll pairs 9, 9'. The fluctuation of quality and the homogeneous nature of the casting can thus be compensated.
  • the continuous casting mold 12 is made of a very large cross section 8 in order to combine the highest possible cooling rates with the highest possible quantity of casting metal in such a way that the metal can still form metal structure which is free from inhomogeneities.
  • the width of the strand which corresponds to the width of the cross section 8 and the width of the gap of the upsetting mill must both be in harmony with the width of the gap of the high deformation mill 56.
  • a ratio of the three mentioned passages to be suggested to the specialists should be selected, for example, that the cross section of the side lengths of the mold are 300 and 240 mm, the roll gap of the upsetting rolls stand 9 having a side ratio of 250 by 250 mm, while for reshaping the high deformation machine 12 side ratios of 200 by 200mm and less as desired should be provided.
  • a descaling device (not shown) may be provided instead of the heating system 20 or inserted ahead of it in order to meet the requirements for high deforming and especially to obtain a perfect material.
  • the cross section of the cast material can be 300' by 240 mm which can be cast at a rate of v;l .04 meters per minute and be transferred to a roll stand which fulfills the function of a driver.
  • this driver the cross section of 250 by 250 mm is obtained.
  • the high deformation machine deforms the cross section to the final cross section of by 70 mm.
  • Surprising the output of a single vein installation is about 570 kg per minute, that is, 34 tons per hour. This results in an annular production of 122,000 tons..
  • the calculation is as follows: the cross section of 250 by 250 mm is run into the high deformation machine and a casting rate of v 0.983 meters per minute and shaped to the final cross section of 70 by 70 mm.
  • the output of the signal vein installation then is 467 kilograms per minute corresponding to the 28 tons per hour.
  • an annual output of 100,000 tons which therefore is considerably lower than the output of a rolling arrangement including an upsetting mill (122,000 tons).
  • the production of the output of the casting rolling installation according to the invention constitutes an optimum between supply and fabrication of the casting material. It is appropriate to provide a dependent ratio of the cross sectional dimensions in all stations. According to the invention the casting cross section presents a side ratio of greater than 1, the upsetting rolling gap presents a ratio of l and that of the high deformation stand of l or less than 1.
  • the installation can be so operated that the casting tension between the high deformation stand and the upsetting stand is regulated by varying the speed of rotation of the rolls or by varying the working speed of the rolls of the high deformation stand 56.
  • the apparatus permits the formation of the casting so that its longitudinal sides may have a selected size in relation to the cross dimension or width to provide a related side ratio.
  • the geometrical surface of a rectangle requires inherently a side ratio which onl atpproaches one as a limit when it is the same as tha o a square, to wit 1:1.
  • the apparatus of the invention may be constructed so that there is a side ratio of a preselected rectangular cross-section or a square crosssection.
  • the casting mold may have a longitudinal side which is larger than the width.
  • the upsetting roller nip which is formed by the rollers 9,9, has a through-flow opening of square cross-section.
  • the nip of deformation rollers 14,14 frame is either square or rectangular.
  • side ratio it is not determined in advance where the shorter or the longer side is to be situated. The shorter side may thus extend horizontally or vertically.
  • a method for the continuous casting and subsequent hot rolling from the casting heat of metal, particularly steel comprising casting a strand of 300 by 240 mm at 1.04 meters per minute and subsequently subjecting the strand to reduction of its cross section and causing a stretching of the strand by a first pass at a first station edging the strand to 250 by 250 mm and in a second pass at a second station forming the strand by high deformation to a billet of by 70 mm of final cross section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
US00886518A 1968-12-24 1969-12-19 Method for casting and rolling of metal stands from the casting heat Expired - Lifetime US3710841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1816849A DE1816849C3 (de) 1968-12-24 1968-12-24 Verfahren zum Stranggießen und anschließendem Walzen aus der Gieß hitze von Stahl

Publications (1)

Publication Number Publication Date
US3710841A true US3710841A (en) 1973-01-16

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Application Number Title Priority Date Filing Date
US00886518A Expired - Lifetime US3710841A (en) 1968-12-24 1969-12-19 Method for casting and rolling of metal stands from the casting heat
US00180363A Expired - Lifetime US3746076A (en) 1968-12-24 1971-09-14 Device for the continuous casting and subsequent rolling of a metal from its casting heat in short steps

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00180363A Expired - Lifetime US3746076A (en) 1968-12-24 1971-09-14 Device for the continuous casting and subsequent rolling of a metal from its casting heat in short steps

Country Status (8)

Country Link
US (2) US3710841A (de)
JP (1) JPS4820690B1 (de)
AT (1) AT311913B (de)
CA (1) CA925264A (de)
CH (1) CH518759A (de)
DE (1) DE1816849C3 (de)
ES (1) ES372396A1 (de)
LU (1) LU59649A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003236A (en) * 1975-03-19 1977-01-18 Secim Process of hot continuous rolling
WO1983002783A1 (en) * 1982-02-04 1983-08-18 Southwire Co Method of hot-forming metals prone to crack during rolling
US4456491A (en) * 1979-10-01 1984-06-26 Southwire Company Method of hot-forming metals prone to crack during rolling
US4817703A (en) * 1986-11-06 1989-04-04 Sms Schloemann-Siemag Aktiengesellschaft Strip casing unit with downstream multi-stand continuous rolling mill
US5360054A (en) * 1991-10-11 1994-11-01 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for performing horizontal continuous casting
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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT359671B (de) * 1978-06-23 1980-11-25 Voest Alpine Ag Treibwalzengeruest fuer eine stranggiessanlage
FR2505691A1 (fr) * 1981-05-15 1982-11-19 Fives Cail Babcock Installation de coulee continue courbe
NL9100911A (nl) * 1991-03-22 1992-10-16 Hoogovens Groep Bv Inrichting en werkwijze voor het vervaardigen van warmgewalst staal.
FR2697182B1 (fr) * 1992-10-26 1995-01-13 Clecim Sa Dispositif pour le guidage d'une barre de coulée de la sortie de sa roue de coulée jusqu'à l'entrée d'un laminoir.
EP2025432B2 (de) * 2007-07-27 2017-08-30 Concast Ag Verfahren zur Erzeugung von Stahl-Langprodukten durch Stranggiessen und Walzen
CN113210425A (zh) * 2021-03-18 2021-08-06 兴化市广福金属制品有限公司 一种不锈钢带材连轧连铸设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714752A (en) * 1950-08-16 1955-08-09 Olin Mathieson Continuous casting apparatus
GB950882A (en) * 1961-05-01 1964-02-26 Davy & United Eng Co Ltd Improvements in or relating to roll adjustment apparatus
US3317994A (en) * 1964-08-19 1967-05-09 Southwire Co Method of conditioning metal for hot forming
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395684A (en) * 1889-01-08 Method of making rods
US2698467A (en) * 1950-06-05 1955-01-04 Edward W Osann Jr Method and apparatus for the continuous casting of metal
US3333452A (en) * 1965-03-03 1967-08-01 Sendzimir Inc T Reduction of thick flat articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714752A (en) * 1950-08-16 1955-08-09 Olin Mathieson Continuous casting apparatus
GB950882A (en) * 1961-05-01 1964-02-26 Davy & United Eng Co Ltd Improvements in or relating to roll adjustment apparatus
US3317994A (en) * 1964-08-19 1967-05-09 Southwire Co Method of conditioning metal for hot forming
US3358358A (en) * 1964-12-31 1967-12-19 United States Steel Corp Method of reducing width of metal slabs
US3491824A (en) * 1966-12-06 1970-01-27 Boehler & Co Ag Geb Process of producing rolled stock from a high-melting metal by continuous casting and rolling operations
US3543555A (en) * 1967-05-16 1970-12-01 Demag Ag Form changing device for continuous casting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003236A (en) * 1975-03-19 1977-01-18 Secim Process of hot continuous rolling
US4456491A (en) * 1979-10-01 1984-06-26 Southwire Company Method of hot-forming metals prone to crack during rolling
WO1983002783A1 (en) * 1982-02-04 1983-08-18 Southwire Co Method of hot-forming metals prone to crack during rolling
US4817703A (en) * 1986-11-06 1989-04-04 Sms Schloemann-Siemag Aktiengesellschaft Strip casing unit with downstream multi-stand continuous rolling mill
US5360054A (en) * 1991-10-11 1994-11-01 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for performing horizontal continuous casting
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

Also Published As

Publication number Publication date
DE1816849A1 (de) 1970-07-02
AT311913B (de) 1973-12-10
CA925264A (en) 1973-05-01
CH518759A (de) 1972-02-15
ES372396A1 (es) 1972-01-01
DE1816849B2 (de) 1973-05-24
DE1816849C3 (de) 1973-12-13
JPS4820690B1 (de) 1973-06-22
US3746076A (en) 1973-07-17
LU59649A1 (de) 1970-01-12

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