EP0563786B1 - Verfahren zum Giessen von höchstlegierten Stählen auf Kreisbogen-Stranggiessanlagen - Google Patents

Verfahren zum Giessen von höchstlegierten Stählen auf Kreisbogen-Stranggiessanlagen Download PDF

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Publication number
EP0563786B1
EP0563786B1 EP93104905A EP93104905A EP0563786B1 EP 0563786 B1 EP0563786 B1 EP 0563786B1 EP 93104905 A EP93104905 A EP 93104905A EP 93104905 A EP93104905 A EP 93104905A EP 0563786 B1 EP0563786 B1 EP 0563786B1
Authority
EP
European Patent Office
Prior art keywords
strand
steel
steel strand
straightening
casting
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
Application number
EP93104905A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0563786A1 (de
Inventor
Hans-Georg Dr.-Ing. Rosenstock
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.)
IBVT INGENIEURBUERO FUER VERFAHRENSTECHNIK GMBH
Original Assignee
Ibvt Ingenieurbuero fur Verfahrenstechnik GmbH
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.)
Filing date
Publication date
Application filed by Ibvt Ingenieurbuero fur Verfahrenstechnik GmbH filed Critical Ibvt Ingenieurbuero fur Verfahrenstechnik GmbH
Publication of EP0563786A1 publication Critical patent/EP0563786A1/de
Application granted granted Critical
Publication of EP0563786B1 publication Critical patent/EP0563786B1/de
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Classifications

    • 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
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock

Definitions

  • the invention relates to a method for casting high-alloy steels on circular arc continuous casting machines, the molten steel through a water-cooled mold is led from which a surface solidified Steel strand emerges, which is subjected to Coolants cooled for further solidification, over Support rollers deflected in a circle and then over a multi-point bending device from the circular arc back in the horizontal is bent back.
  • Highly alloyed steels such as austenitic or ferritic chrome-nickel, nickel-chrome or 13% Chrome steels, which depending on the application and stress Molybdenum, vanadium, tungsten, silicon or aluminum as further alloy components are added, and as rust and acid resistant, as heat resistant or scale resistant steels and tool steels use find, solidify without transformation: depending on the chemical Composition differ during solidification Carbides and other phases, which are metallurgically in the Structure of the steel alloy in its composition of the basic matrix differ significantly and unfavorable on toughness and resilience impact. Tensions during solidification, Cooling and hot forming, especially during the Straightening of these steels occur easily Tears between the interfaces of the crystals.
  • the invention is therefore based on the object of specifying a method which is error-free Production of the highest alloyed steels on such continuous casting plants is permitted, with regard to the use of all steel brands and lot sizes in the stainless steel sector are flexible, whereby care is taken in the process that the steel matrix occurring stresses and surface cracks can be avoided.
  • the invention provides a method for casting high-alloy steels on circular arc continuous casting plants on hand, the steel melt through a water-cooled mold is guided, from which a surface solidified steel strand emerges, which is under pressure cooled by coolants for further solidification, deflected in a circle via support rollers and then from a circular arc back into the horizontal using a multi-point bending device is bent back, the in the area of the multi-point bending device Strand temperatures are determined via the thickness of the strand cross section and under Consideration of hot forming tests known per se in the form of flow curves yield stresses determined depending on the forming speed and the Strand temperature the guide force is calculated for the minimum deformation that is required around the steel strand in the multi-point bending device from the circular arc to the horizontal to bend back, and that a target-actual value comparison of the straightening force is carried out and at Exceeding or falling below the arithmetically determined limit of the straightening force Strand temperature in the multi-point bending device by increasing or reducing the Secondary
  • the invention is intended to be gentle on the respective steel brand, the format to be cast and the Casting speed or strand cooling coordinated Straightening operations when straightening the on circular arc caster generated arcuate Steel strand in the area of a Multi-point bending device to perform the dreaded surface cracking in the strands to master better.
  • the invention proposes that Straightening force for straightening the curved Steel strand to be calculated under the guideline that limit the stresses that occur so that the Steel matrix can accommodate them without separations.
  • the high-temperature material properties obtained in this way are the strand temperatures assigned, which according to the invention in the field of Reference point can be determined via the strand cross-section, for example, in that the Strand surface temperature measured and from that Temperature profile calculated over the strand cross-section becomes. Taking these requirements into account, the Casting conditions and the strand formats the leveling force calculated, which is required to the steel strand from Circular arc over a multi-point bending device in the Bend back horizontal. In the figure is a Block diagram shown, from which it can be seen in what way the high temperature properties of a Steel for determining the target temperatures influenceable and thus by the casting conditions and the strand cooling adjustable, required straightening force and Straightening work can be used.
  • the required straightening force is compared in the target / actual value comparison undershot, the Casting speed reduced and / or the Strand cooling can be adapted accordingly. So that will lowered the target temperature and that for achieving of a straight strand required minimum deformation not exceeded.
  • the method does not solely on straightening cast steel strands remains limited, which is already in the bending device are completely frozen.
  • the method according to the invention can also be limited to the Straighten semi-rigid strands, one solidified edge zone and a still fluid core area exhibit.
  • Straightening partially frozen Steel strands require less directional deformation as completely solidified strands, so that the deformation overall can be done more gently. This also affects advantageous when straightening high-temperature steels the system parts of the multi-point bending device, the are exposed to less stress.
  • the design and control of the continuous caster must take these requirements into account. It must therefore depending on the steel brand and the one to be cast Format different casting speeds and Control options for strand cooling set and it must be ensured that Solidification behavior, resulting stress states and heat dissipation coordinated and regulated can be. With this regulation, the Steel strands in the most gentle way possible Straightening treated so that surface cracks largely can be excluded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP93104905A 1992-03-31 1993-03-25 Verfahren zum Giessen von höchstlegierten Stählen auf Kreisbogen-Stranggiessanlagen Expired - Lifetime EP0563786B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4210495 1992-03-31
DE4210495A DE4210495C1 (ko) 1992-03-31 1992-03-31

Publications (2)

Publication Number Publication Date
EP0563786A1 EP0563786A1 (de) 1993-10-06
EP0563786B1 true EP0563786B1 (de) 1998-11-11

Family

ID=6455492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104905A Expired - Lifetime EP0563786B1 (de) 1992-03-31 1993-03-25 Verfahren zum Giessen von höchstlegierten Stählen auf Kreisbogen-Stranggiessanlagen

Country Status (8)

Country Link
US (1) US5454417A (ko)
EP (1) EP0563786B1 (ko)
JP (1) JP2635906B2 (ko)
KR (1) KR960008876B1 (ko)
AT (1) ATE173188T1 (ko)
DE (2) DE4210495C1 (ko)
DK (1) DK0563786T3 (ko)
ES (1) ES2123583T3 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650790B2 (en) * 1993-10-29 2013-10-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Method for thermal surface treatment in a continuous casting machine
US6789602B2 (en) 2002-02-11 2004-09-14 Commonwealth Industries, Inc. Process for producing aluminum sheet product having controlled recrystallization
ITMI20021512A1 (it) * 2002-07-10 2004-01-12 Danieli Off Mecc Metodo per la regolazione della temperatura del nastro in un impiantodi colata continua di nastro metallico e relativo dispositivo di attua

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358743A (en) * 1964-10-08 1967-12-19 Bunker Ramo Continuous casting system
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel
AT289313B (de) * 1967-01-14 1971-04-13 Demag Ag Bogenstranggießanlage
JPS5240883A (en) * 1975-09-29 1977-03-30 Yukio Matsumoto Noise reduceable pile driver
CH630821A5 (de) * 1978-08-11 1982-07-15 Concast Ag Verfahren zur vermeidung von beschaedigungen an strangfuehrungselementen einer stranggiessanlage fuer stahl.
FR2477925A1 (fr) * 1980-03-13 1981-09-18 Fives Cail Babcock Procede de controle du refroidissement du produit coule dans une installation de coulee continue
JPS5741868A (en) * 1980-08-26 1982-03-09 Kawasaki Steel Corp Method for controlling pouring condition in continuous casting
JPS5788958A (en) * 1980-11-26 1982-06-03 Nippon Steel Corp Continuous casting method
AT378707B (de) * 1983-01-11 1985-09-25 Voest Alpine Ag Verfahren zum ueberwachen einer bogenstranggiessanlage
DE3736999A1 (de) * 1987-10-31 1989-06-01 Rosenstock Hans G Verfahren zur walzkraftmessung an walzwerkswalzen
JPH0763827B2 (ja) * 1989-02-27 1995-07-12 住友金属工業株式会社 鋼の連続鋳造方法
JPH02280952A (ja) * 1989-04-20 1990-11-16 Daido Steel Co Ltd 連続鋳造鋳片の矯正方法
JPH03193254A (ja) * 1989-12-25 1991-08-23 Kawasaki Steel Corp 極低炭素鋼の連続鋳造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
H.G. BAUMANN: "Stahlstrang-Gie$anlagen", VERLAG STAHLEISEN M.B.H., DüSSELDORF *

Also Published As

Publication number Publication date
KR960008876B1 (en) 1996-07-05
JPH06126410A (ja) 1994-05-10
ATE173188T1 (de) 1998-11-15
DE59309116D1 (de) 1998-12-17
KR930019305A (ko) 1993-10-18
US5454417A (en) 1995-10-03
ES2123583T3 (es) 1999-01-16
JP2635906B2 (ja) 1997-07-30
DK0563786T3 (da) 1999-07-26
EP0563786A1 (de) 1993-10-06
DE4210495C1 (ko) 1993-04-15

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