US3572420A - Method for mould cooling in continuous casting - Google Patents

Method for mould cooling in continuous casting Download PDF

Info

Publication number
US3572420A
US3572420A US707060A US3572420DA US3572420A US 3572420 A US3572420 A US 3572420A US 707060 A US707060 A US 707060A US 3572420D A US3572420D A US 3572420DA US 3572420 A US3572420 A US 3572420A
Authority
US
United States
Prior art keywords
mould
pressure
cooling
counter
coolant
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
US707060A
Other languages
English (en)
Inventor
William H Summers
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.)
SMS Concast AG
Original Assignee
Concast 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.)
Filing date
Publication date
Application filed by Concast AG filed Critical Concast AG
Application granted granted Critical
Publication of US3572420A publication Critical patent/US3572420A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • This invention relates to a method of cooling the mould during the process of continuously casting a metal, particularly steel, cooling being effected by a flowing medium.
  • the continuous casting of metals proceeds by pouring a melt into a cooled open-ended mould from which the casting, having formed a solidified crust containing a liquid core, is continuously withdrawn.
  • the quality of the casting and its further processability depend decisively upon the quality of its surface. Frequent defects are cracks caused by a non-uniform and excessively abrupt cooling rate inside the mould.
  • One known method of reducing the liability of a casting to crack consists in reducing the intensity of the cooling effect by applying a coating of a material that is a poor conductor of heat to that side of the mould wall which is in contact with the coolant.
  • this method has the drawback that once the coating has been applied the cooling conditions cannot be further varied, for instance in order to adapt them to different qualities of steel that are to be cast or to changes in the casting conditions themselves.
  • the application of such a coating presents certain difficulties.
  • counter-pressure is the pressure applied in opposition to full flow as measured at the outlet valve which is provided to produce the desired amount of counterpressure.
  • the amounts of counter-pressure specified herein are the amounts by which the pressure of fluid flowing through the outlet at full flow (suitably measured by a conventional gauge at the outlet) is increased by operating the outlet valve to restrict the outflow.
  • the counter-pressure modifies the conditions of flow in the cooling gap and by affecting the turbulance of the boundary layer which determines the transfer of heat the rate of abstraction of heat can be reduced.
  • the counterpressure applied to the coolant such as water, also raises the pressure of the water inside the cooling gap and localized boiling which causes non-uniform cooling can be avoided.
  • Another advantage of the application of a counter-pressure is the greater uniformity of the resultant cooling effect by compensation of distortion of the mould wall.
  • the reduction of any gas-filled cavity, caused for instance by air bubbles also has a favorable effect.
  • the desired effect is optimal when the counter-pressure is between 4.27 and 42.66 p.s.i.g. depending upon existing conditions.
  • the preferred pressure is between 7.11 and 21.33 p.s.i.g.
  • a deaeratable mould may be used
  • the counter-pressure may be generated in various ways. For instance, on the water outlet side a gate or like valve may be provided permitting the counter-pressure to be adjusted and controlled whilst casting proceeds. Regulation may be effected for instance by reference to the rate of abstraction of heat by the cooling Water.
  • the longer side of the mould may be divided into several chambers and the counter-pressure separately controlled for each chamber as may be required.
  • the mould 10 is an open-ended mould into the top end of which molten metal, such as steel, is poured.
  • the mould which is cooled by circulating water, or other suitable coolant, through a chamber 11 in the mould wall around the mould cavity, solidifies the periphery of the metal in the mould to form a continuous casting 12 having a solidified crust 13 and a liquid core 14.
  • the casting 12 emerges from the bottom end of the mould.
  • the coolant is fed through an inlet pipe 15 into the lower end of the chamber 11 and circulates up through the chamber 11 to the top end of the mould where it flows out through an outlet pipe 16.
  • the circulation of coolant is preferably from the bottom to the top end of the mould. This provides the greatest cooling effect at the bottom end of the mould for forming and maintaining a sufficient thickness of solidified crust 13 to contain the liquid core 14 when the casting 12 emerges from the mould.
  • a gate valve 17, or other suitable fiuid flow adjusting valve, is provided in the outlet pipe 16 for applying and adjusting the counter-pressure applied to the coolant flowing through the mould chamber 11 in accordance with the method of this invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
US707060A 1967-02-24 1968-02-21 Method for mould cooling in continuous casting Expired - Lifetime US3572420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH284667A CH455164A (de) 1967-02-24 1967-02-24 Verfahren zum Kühlen einer Kokille beim Stranggiessen

Publications (1)

Publication Number Publication Date
US3572420A true US3572420A (en) 1971-03-23

Family

ID=4242894

Family Applications (1)

Application Number Title Priority Date Filing Date
US707060A Expired - Lifetime US3572420A (en) 1967-02-24 1968-02-21 Method for mould cooling in continuous casting

Country Status (7)

Country Link
US (1) US3572420A (no)
AT (1) AT280507B (no)
BE (1) BE711195A (no)
CH (1) CH455164A (no)
DE (1) DE1608059B1 (no)
FR (1) FR1554483A (no)
SE (1) SE344548B (no)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981351A (en) * 1973-11-26 1976-09-21 Metallurgie Hoboken-Overpelt Mold for the continuous vertical casting of billets
US3996995A (en) * 1974-11-28 1976-12-14 Davy International Limited Continuous casting mould

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981351A (en) * 1973-11-26 1976-09-21 Metallurgie Hoboken-Overpelt Mold for the continuous vertical casting of billets
US3996995A (en) * 1974-11-28 1976-12-14 Davy International Limited Continuous casting mould

Also Published As

Publication number Publication date
DE1608059B1 (de) 1972-05-04
SE344548B (no) 1972-04-24
AT280507B (de) 1970-04-10
FR1554483A (no) 1969-01-17
CH455164A (de) 1968-04-30
BE711195A (no) 1968-07-01

Similar Documents

Publication Publication Date Title
KR101489395B1 (ko) 유사 냉각 범위를 갖는 여러 금속의 순차적 주조
US3746077A (en) Apparatus for upward casting
US2515284A (en) Differential cooling in casting metals
US2956320A (en) Casting of metal
US4715428A (en) Method and apparatus for direct casting of crystalline strip by radiant cooling
US6315030B1 (en) High speed continuous casting device and relative method
US2127515A (en) Method of producing solid metal of substantially constant cross section throughout its length directly from a mass of molten metal and to an apparatus therefor
JP2001516284A (ja) 改良された連続鋳型及び連続鋳造法
US3572420A (en) Method for mould cooling in continuous casting
US3593778A (en) Continuous casting apparatus
RU1819188C (ru) Способ охлаждени стальных слитков при непрерывной разливке и установка дл его осуществлени
US4678719A (en) Method and apparatus for continuous casting of crystalline strip
US3425482A (en) Continuous casting of non-ferrous metals
US3735798A (en) Methods for casting hollow ingots
CA1241178A (en) Method and apparatus for continuous casting of crystalline strip
JP3089608B2 (ja) ビームブランクの連続鋳造方法
EP0174767B1 (en) Method and apparatus for direct casting of crystalline strip by radiantly cooling
JPS58103941A (ja) 鏡面を有する金属成形体の連続製造法及びその装置
CS216925B2 (en) Method of continuous casting of the steel product
US1836310A (en) Cooling means for ingot molds
JPS62227562A (ja) 連続鋳造金属製品を冷却する装置および方法
EP0174766B1 (en) Method and apparatus for direct casting of crystalline strip in non-oxidizing atmosphere
US4176707A (en) Method of continuously casting a steel strand
JPH06292946A (ja) 金属のホットトップ垂直連続鋳造方法および装置
DE1608059C (de) Verwendung eines Ventils an der Abflußseite einer Stranggießkokille