US20100282432A1 - Method and device for equalizing the solidification process of a molten metal particularly produced during strand or strip casting - Google Patents

Method and device for equalizing the solidification process of a molten metal particularly produced during strand or strip casting Download PDF

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Publication number
US20100282432A1
US20100282432A1 US12/734,786 US73478608A US2010282432A1 US 20100282432 A1 US20100282432 A1 US 20100282432A1 US 73478608 A US73478608 A US 73478608A US 2010282432 A1 US2010282432 A1 US 2010282432A1
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United States
Prior art keywords
molten metal
strand
region
equalizing
solidification process
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Abandoned
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US12/734,786
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English (en)
Inventor
Hans-Juergen Schemeit
Joerg Bausch
Jochen Wans
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SMS Siemag AG
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Individual
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Assigned to SMS SIEMAG AG reassignment SMS SIEMAG AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAUSCH, JOERG, SCHEMEIT, HANS-JUERGEN, WANS, JOCHEN
Publication of US20100282432A1 publication Critical patent/US20100282432A1/en
Abandoned legal-status Critical Current

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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
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields

Definitions

  • the invention relates to a method of and a device for equalizing solidification of molten metal produced, in particular, during strand or strip casting and wherein the molten metal is subjected, in particular, to an electromagnetic stirring process, wherein a magnetic field is applied, upstream of the area of, in particular, electromagnetic stirring, to the metal located there.
  • the invention also relates, in addition, to a device for carrying out the process.
  • U.S. Pat. No. 4,933,005 discloses an induction stirring method according to which, molten metal is electromagnetically stirred usually with intensity that produces turbulence in the molten metal, and upstream of the area of the electromagnetic stirring, a static magnetic field is applied with intensity to the molten metal and which is sufficient for reducing turbulence in the mentioned area to a smallest extent.
  • the described method is directed to improving inducting stirring applications where, among others, a free surface exists during stirring in molds and during electromagnetic stirring in ladles or other containers, and surface disturbances and distortions in meniscus should be reduced to a minimum.
  • Japanese Publication JP 06182502 A relates to a single metal strip-type caster in which it is suggested to provide an electromagnetic brake above a region of a molten metal and specifically at the drawing side of the metal belt rather than at a point of pouring molten metal on the belt, in order to prevent waving of the molten metal region and to obtain a metal strip with a flat surface without roughness.
  • the electromagnetic brake is provided above the molten metal regions and, in particular, at the drawing side of the metal belt rather than at the point of pouring molten metal.
  • This arrangement eliminates waving in the direction of the metal belt as seen from the electromagnetic brake, and so a flat molten metal is formed. Therefore, due to the formation of a solidified shell without waving in the molten metal region, a flat surface shape of the surface of the solidified shell, without roughness, is achieved.
  • the object of the invention is to improve and further develop the known methods and devices, while retaining the existing advantages, that the above-mentioned drawbacks are eliminated, wherein, in particular, optimization of a precise shape of a strand, a better control of a metallurgical length, and a better adaptation of the speed are achieved.
  • the object of the invention is achieved by applying, during the solidification process, at least one magnetic field to an already solidified, at the outside, into a strand, region of the molten metal.
  • the naturally developed temperature profile in a still molten core is homogenized by action of an electromagnetic field on the already solidified, at the outside, into a strand, melt.
  • the uniform distribution of energy in the molten core provides always the most possible temperature at the inner side of the strand shell.
  • the thickness growth of the shell is delayed, whereby the heat removal is increased. Due to a higher heat removal, the cast strip solidifies more rapidly.
  • the strand shell is heated somewhat again at the start of stirring, so that its thickness growth is delayed, and the shell, which remains warm longer and becomes thinner, only later acquires its mechanical characteristics. Thereby, it lies flatly on the cooled conveyor belt for a longer time which leads to reduction of inner stresses and of a possible high-arching of the edges.
  • the electromagnetic field is applied to an already solidified, at the outside, into a strand, region essentially at a bottom of the molten metal. In this area, as a rule, a greater heat removal takes place than at the upper surface and the narrow sides.
  • a position of the electromagnetic stirring process is adapted in the casting direction.
  • the object of the invention is achieved, according to the invention, by providing a device formed for applying, during the solidification process, at least one magnetic field to an already solidified, at the outside, into a strand, region of the molten metal.
  • the device is formed for applying at least one electromagnetic field to an already solidified, at the outside, into a strand, region essentially at a bottom of the molten metal.
  • the position of the electromagnetic stirring process is adapted in the casting direction.
  • FIG. 1 a schematic view of a temperature profile of the molten metal and of the strand shell with the use of the inventive method in comparison with the state of the art;
  • FIG. 2 an enlarged view of the left portion in FIG. 1 ;
  • FIG. 3 a schematic view of solidified stretches of the molten metal in the casting direction.
  • the inventive method serves for equalizing the solidification process of molten metal which is designated with 10 in FIG. 1 and which is produced, in particular, during casting of strand or strip.
  • the molten metal 10 is subjected to an electromagnetic stirring process, with a magnetic field being applied to the metal upstream of the area of the electromagnetic stirring.
  • at least one electromagnetic field is applied to an already solidified, at the outside, into a strand, region 11 of the molten metal 10 .
  • a further advantage consists in that by producing a uniform temperature field over the cross-section of the molten core, the strand shell 12 is heated somewhat again at the start of stirring so that its thickness growth is delayed, and the shell 12 , which remains warm longer and becomes thinner, only later acquires its mechanical characteristics. Thereby, it lies flatly on the cooled conveyor belt for a longer time which leads to reduction of inner stresses and of a possible high-arching of the edges.
  • FIGS. 1 and 2 show a temperature profile of the molten metal 10 and the strand shell 12 with the use of the inventive method in comparison with the state of the art.
  • the solidified region 11 of the metal 10 and, thus, the thickness d 2 of the strand shell 12 is substantially thicker than the solidified region 13 of the metal 10 at a delayed solidification and, thus, the thickness d 1 of the strand shell 12 , see FIGS. 1 and 2 .
  • the temperature profile of the molten metal 10 and the strand shell 12 wherein the temperature 9 with stirrer shows the temperature of the stirring process, and the temperature 9 without stirrer shows the temperature without the stirring process. It can be seen that the temperature without the stirring process raises noticeably faster and, finally, is at a higher level than the temperature with the stirring process.
  • the electromagnetic field to the already solidified, at the outside, into a strand, region 11 essentially, at a bottom of the molten metal 10 . It can further be provided to adapt the position of the electromagnetic stirring process in the casting direction.
  • FIG. 3 shows solidification stretches of the molten metal 10 in the casting direction shown with arrow A.
  • the solidification stretch EN shows a normal solidification stretch
  • the solidification stretch EV shows a shortened solidification stretch with stirring.
  • the present invention also relates to a device, not shown in the drawings, for carrying out the method, in particular, the electromagnetic stirring process in the molten metal 10 .
  • the device is formed for applying at least one electromagnetic field during the stirring process to an already solidified, at the outside, into a strand, region 11 of the molten metal 10 , preferably, at the bottom of the molten metal 10 . It can further be provided for adaptation of the position of the electromagnetic stirring process in the casting direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US12/734,786 2007-11-26 2008-11-24 Method and device for equalizing the solidification process of a molten metal particularly produced during strand or strip casting Abandoned US20100282432A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007059919A DE102007059919A1 (de) 2007-11-26 2007-11-26 Verfahren und Vorrichtung zum Vergleichsmäßigen des Erstarrungsvorganges eines insbesondere beim Strang- oder Bandgießen erzeugten schmelzflüssigen Metalles
DE102007059919.8 2007-11-26
PCT/EP2008/009938 WO2009068232A1 (de) 2007-11-26 2008-11-24 Verfahren und vorrichtung zum vergleichmässigen des erstarrungsvorganges eines insbesondere beim strang- oder bandgiessen erzeugten schmelzflüssigen metalles

Publications (1)

Publication Number Publication Date
US20100282432A1 true US20100282432A1 (en) 2010-11-11

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US12/734,786 Abandoned US20100282432A1 (en) 2007-11-26 2008-11-24 Method and device for equalizing the solidification process of a molten metal particularly produced during strand or strip casting

Country Status (12)

Country Link
US (1) US20100282432A1 (ru)
EP (1) EP2219805A1 (ru)
JP (1) JP2011504418A (ru)
KR (1) KR20100080841A (ru)
CN (1) CN101873902A (ru)
CA (1) CA2705222C (ru)
DE (1) DE102007059919A1 (ru)
RU (1) RU2458759C2 (ru)
TW (1) TW200932401A (ru)
UA (1) UA97034C2 (ru)
WO (1) WO2009068232A1 (ru)
ZA (1) ZA201002933B (ru)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102513523B (zh) * 2011-12-20 2013-11-27 钢铁研究总院 一种熔点以下完全充型铸造方法
CN107977084B (zh) 2012-05-09 2021-11-05 苹果公司 用于针对在用户界面中执行的操作提供触觉反馈的方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976117A (en) * 1974-11-01 1976-08-24 Erik Allan Olsson Method of and apparatus for converting molten metal into a semi-finished or finished product
US4933005A (en) * 1989-08-21 1990-06-12 Mulcahy Joseph A Magnetic control of molten metal systems
US6501674B2 (en) * 2001-03-13 2002-12-31 Oki Electric Industry Co., Ltd. Semiconductor memory and its driving method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5775257A (en) * 1980-10-30 1982-05-11 Nippon Kokan Kk <Nkk> Continuous horizontal casting method for steel
SU980937A1 (ru) * 1981-01-06 1982-12-15 Государственный научно-исследовательский и проектный институт сплавов и обработки цветных металлов "Гипроцветметобработка" Установка непрерывного лить
JPS61108458A (ja) * 1984-11-01 1986-05-27 Kobe Steel Ltd 電磁攪拌装置の制御方法
JPS61249648A (ja) * 1985-04-26 1986-11-06 Sumitomo Metal Ind Ltd 薄鋳片の連続鋳造方法
JPS62176645A (ja) * 1986-01-29 1987-08-03 Nippon Kokan Kk <Nkk> 水平連続鋳造機の電磁撹拌装置
JP2574550B2 (ja) * 1991-04-12 1997-01-22 新日本製鐵株式会社 単ベルト方式連続鋳造装置
JPH06182502A (ja) 1992-12-16 1994-07-05 Nippon Steel Corp 単ベルト式金属帯連続鋳造装置
SE519840C2 (sv) * 2000-06-27 2003-04-15 Abb Ab Förfarande och anordning för kontinuerlig gjutning av metaller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976117A (en) * 1974-11-01 1976-08-24 Erik Allan Olsson Method of and apparatus for converting molten metal into a semi-finished or finished product
US4020890A (en) * 1974-11-01 1977-05-03 Erik Allan Olsson Method of and apparatus for excluding molten metal from escaping from or penetrating into openings or cavities
US4933005A (en) * 1989-08-21 1990-06-12 Mulcahy Joseph A Magnetic control of molten metal systems
US6501674B2 (en) * 2001-03-13 2002-12-31 Oki Electric Industry Co., Ltd. Semiconductor memory and its driving method

Also Published As

Publication number Publication date
DE102007059919A1 (de) 2009-05-28
TW200932401A (en) 2009-08-01
RU2010126206A (ru) 2012-01-10
UA97034C2 (ru) 2011-12-26
CA2705222A1 (en) 2009-06-04
EP2219805A1 (de) 2010-08-25
KR20100080841A (ko) 2010-07-12
CN101873902A (zh) 2010-10-27
JP2011504418A (ja) 2011-02-10
WO2009068232A1 (de) 2009-06-04
RU2458759C2 (ru) 2012-08-20
CA2705222C (en) 2013-01-08
ZA201002933B (en) 2011-03-30

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