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 PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- molten metal
- strand
- region
- equalizing
- solidification process
- 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.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 title claims abstract description 36
- 238000007711 solidification Methods 0.000 title claims abstract description 23
- 230000008023 solidification Effects 0.000 title claims abstract description 23
- 238000005266 casting Methods 0.000 title claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 230000005672 electromagnetic field Effects 0.000 claims description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000003111 delayed effect Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- B22D11/12—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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
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 |
Family
ID=40325732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 (ko) |
EP (1) | EP2219805A1 (ko) |
JP (1) | JP2011504418A (ko) |
KR (1) | KR20100080841A (ko) |
CN (1) | CN101873902A (ko) |
CA (1) | CA2705222C (ko) |
DE (1) | DE102007059919A1 (ko) |
RU (1) | RU2458759C2 (ko) |
TW (1) | TW200932401A (ko) |
UA (1) | UA97034C2 (ko) |
WO (1) | WO2009068232A1 (ko) |
ZA (1) | ZA201002933B (ko) |
Families Citing this family (2)
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 |
CN108287651B (zh) | 2012-05-09 | 2021-04-13 | 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)
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)
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 |
-
2007
- 2007-11-26 DE DE102007059919A patent/DE102007059919A1/de not_active Withdrawn
-
2008
- 2008-11-24 EP EP08853616A patent/EP2219805A1/de not_active Withdrawn
- 2008-11-24 RU RU2010126206/02A patent/RU2458759C2/ru not_active IP Right Cessation
- 2008-11-24 JP JP2010534416A patent/JP2011504418A/ja active Pending
- 2008-11-24 WO PCT/EP2008/009938 patent/WO2009068232A1/de active Application Filing
- 2008-11-24 CN CN200880117782A patent/CN101873902A/zh active Pending
- 2008-11-24 CA CA2705222A patent/CA2705222C/en not_active Expired - Fee Related
- 2008-11-24 US US12/734,786 patent/US20100282432A1/en not_active Abandoned
- 2008-11-24 UA UAA201007999A patent/UA97034C2/ru unknown
- 2008-11-24 KR KR1020107010453A patent/KR20100080841A/ko not_active Application Discontinuation
- 2008-11-25 TW TW097145442A patent/TW200932401A/zh unknown
-
2010
- 2010-04-28 ZA ZA2010/02933A patent/ZA201002933B/en unknown
Patent Citations (4)
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 |
---|---|
RU2010126206A (ru) | 2012-01-10 |
EP2219805A1 (de) | 2010-08-25 |
CA2705222A1 (en) | 2009-06-04 |
DE102007059919A1 (de) | 2009-05-28 |
WO2009068232A1 (de) | 2009-06-04 |
ZA201002933B (en) | 2011-03-30 |
TW200932401A (en) | 2009-08-01 |
CA2705222C (en) | 2013-01-08 |
KR20100080841A (ko) | 2010-07-12 |
UA97034C2 (ru) | 2011-12-26 |
RU2458759C2 (ru) | 2012-08-20 |
JP2011504418A (ja) | 2011-02-10 |
CN101873902A (zh) | 2010-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |