AU2006329116A1 - Method and device for producing hot metallic strip, in particular from lightweight structural steel - Google Patents
Method and device for producing hot metallic strip, in particular from lightweight structural steel Download PDFInfo
- Publication number
- AU2006329116A1 AU2006329116A1 AU2006329116A AU2006329116A AU2006329116A1 AU 2006329116 A1 AU2006329116 A1 AU 2006329116A1 AU 2006329116 A AU2006329116 A AU 2006329116A AU 2006329116 A AU2006329116 A AU 2006329116A AU 2006329116 A1 AU2006329116 A1 AU 2006329116A1
- Authority
- AU
- Australia
- Prior art keywords
- casting belt
- casting
- strip
- gas
- runner
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000746 Structural steel Inorganic materials 0.000 title claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 55
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 239000000155 melt Substances 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 238000005098 hot rolling Methods 0.000 claims abstract description 3
- 239000011261 inert gas Substances 0.000 claims abstract 3
- 239000007789 gas Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
-
- 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
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0654—Casting belts
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The object of the invention is to improve the quality of cast hot strips. The object is achieved in terms of the method by a method for producing hot metallic strips, in particular of lightweight structural steel, wherein a melt is charged in the presence of inert gas by means of a runner onto a circulating casting belt of a horizontal strip casting facility, solidifies to form a pre-strip with a thickness of between 6 and 20 mm and, after thorough solidification, the pre-strip undergoes a hot rolling process. The invention is characterized in that the heat transfer and the contact (surface area, time) between the strand solidified to form a pre-strip and the casting belt is reduced, and by a device for carrying out the method.
Description
PCT/DE2006/002082 VERIFICATION OF TRANSLATION I, Henry M. Feiereisen, having a place of business at 708 Third Avenue, Suite 1501, New York, N.Y. 10017, state the following: I am the translator of the documents attached and I state that the following is a true translation to the best of my knowledge and belief. Signature: Date: Method And Device For Producing Hot Metallic Strip, In Particular From Lightweight Structural Steel Description The invention relates to a method of producing hot metallic strips, in particular of lightweight structural steel, according to the preamble of claim 1, and to a device according to the preamble of claim 7. A device of a type involved here for producing hot metallic strips of lightweight structural steel is known (steel research 74 (2003), No. 11/12, page 724-731). Melt is fed in the known method from a feed vessel via a runner onto a circulating casting belt of a horizontal strip casting facility. The fed melt solidifies when undergoing intense cooling to form a pre-strip with a thickness in the range between 6-20 mm. After thorough solidification, the pre-strip undergoes a hot rolling process. During solidification, material stress causes warpage of the pre-strip, adversely affecting the quality of the hot strip. In particular, some steels experience on their strand underside irregular and large-area contractions as a result of rapid cooling. Furthermore, there is the possibility of an excessive friction between the casting belt and the solidifying strand, causing an excessive deviation in the synchronous speed between casting belt and rolling speed, so that the strand tears off in the worst case scenario. This problem of adjustment of the synchronous speeds is always relevant when in-line casting and rolling is involved. 1 It is an object of the invention to provide a method and a device for producing hot metallic strips, in particular of lightweight steel, obviating the afore-stated problems. Based on the preamble, this object is solved in combination with the characterizing features of claim 1. Advantageous improvements as well as an apparatus for producing hot strips are the subject matter of the other claims. According to the teaching of the invention, the heat transfer as well as the contact (surface area, time) between the strand solidified to a pre-strip and the casting belt is reduced. There are various ways to achieve this, with each single measure being effective by itself or also in combination. The method according to the invention is basically suitable for the production of hot strips of various metallic materials, in particular also for lightweight structural steel. A first proposal aims to reduce the contact time between casting belt and solidifying strand. This is realized by causing the casting belt to locally vibrate with the aid of an electromagnetic system. This involves the arrangement of an electromagnetic system which function like a loudspeaker, below the casting belt. It is crucial for proper operation to install the system at a site where a solid strand shell has already been formed. A further proposal is directed to the reduction of the heat transfer. This involves charging a gas, in particular a mixed gas of inert and reducing gas, in the charging zone of the melt between runner and casting belt. The reducing gas is preferably hydrogen. Gas acts advantageously across the entire width of the casting belt. The gas volume flow is slight and resembles more a blanketing. When the volume flow is 2 excessive, the planar formation of the strand's underside would be adversely affected. The applied mixed gas provides for the strand to have an underside surface which is substantially scale-free. A blank surface means less heat radiation so that the heat transfer is significantly reduced between the solidifying band and the casting belt. A third proposal involves a structuring of the casting belt and has also proven to be very effective. Longitudinal embossments are advantageously impressed in the casting direction. As an alternative, nubs may be arranged in spaced-apart relationship across the casting belt. The application of longitudinal embossments has the advantage of a fairly simple production by drawing a smooth band through the profiled pair of rolls. It is ensured that any kind of structuring of the casting belt leads to a decrease of the heat transfer between the solidifying strand and the casting belt. The reproduction of the embossments by the melt causes, as a result of shrinkage during solidification, a local detachment of the casting shell and accompanying reduction of the contact surface. This means a decrease in the heat transfer and friction between stand and casting belt and this can be exploited to enhance the process reliability in in-line manufacturing of casting and rolling. The casting speed should ideally be in synchronism with the rolling speed in in-line manufacturing. In reality however, there are oftentimes deviations which must not be excessive as the pre-strip would otherwise tear off. Deviations of the synchronous speed of > 0.5 m/s for example are considered problematic. If such deviations cannot be controlled, a buffer, also called looper, must be installed anteriorly of the roll stand. The method according to the invention will now be described in greater detail with reference to a drawing, in which: 3 Figure la shows a frontal view of the structure of the casting belt in accordance with the invention, Figure lb a cross section in the direction A-A in Figure la, Figure 2 shows a length section of the arrangement according to the invention of an electromagnetic system, Figure 3 shows a length section of the blanketing of the strand's underside, Figure 4 shows a top view of Figure 3. Figure la shows a frontal view of a structure of the casting belt 1 in accordance with the invention. The trailing deflection pulley 2, as viewed in transport direction, can be seen as well as the casting belt 1 placed thereupon and advancing in arrow direction 3. Illustrated are the conjointly moving side boundaries 4, 4' on the top side. Rolled into the casting belt 1 are embossments 5 arranged in length direction. The cutaway illustration Figure lb provides easy depiction of a detail of the cross section in direction A- A in Figure la. Figure 2 shows a second proposal for reducing the heat transfer, with the illustration depicting a length section of the charging zone of a horizontal strip casting facility. The facility includes as main element a melting vessel 6, an inlet 7 with attached runner 8. Melt 9 contained in the melting vessel 6 exits the runner 8 and is fed onto a circulating casting belt 1. To excite local vibrations of the casting belt 1, an electromagnetic system 10 is arranged beneath the casting belt 1. It operates in accordance with the principle of a loudspeaker and causes the casting belt 1 to vibrate. This results in a 4 shortening of the contact times of the solidifying melt with the casting belt 1. The excitation of vibrations is possible only when the melt bath has formed a sufficiently solid casting shell on the underside. The electromagnetic system 10 must therefore be arranged further away from the charging zone. A third proposal for solution shows Figure 3, in which a same length section is shown of a strip casting facility like in Figure 2 so that same reference signs are used for same parts. The third proposal for solution is characterized by a blanketing with a mixed gas before melt 9 is charged onto the casting belt 1. For that purpose, a hollow body 12 is arranged beneath the runner 8 and above the leading deflection pulley 11. A brush 13 is placed in front of the hollow body 12 for sealing and better distribution across the width of the casting belt 1. The hollow body 12 is connected to a feed conduit 14 (Figure 4) for supply of gas. After starting the gas supply, the mixed gas exits the hollow body 12 and flows along the gap between casting belt 1 and underside runner 8 directly to the charging zone. As a result, the casting shell that initially solidifies is prevented from scaling. It remains substantially blank. 5 List of Reference Signs No. Designation 1 Casting belt 2 Trailing deflection pulley 3 Rotation direction 4, 4' Side boundary 5 Longitudinal embossment 6 Melting vessel 7 Inlet 8 Runner 9 Melt 10 Electromagnetic system 11 Leading deflection pulley 12 Hollow body 13 Brush 14 Feed conduit 6
Claims (14)
1. Method of producing hot metallic strips, in particular of lightweight structural steel, wherein a melt is charged by means of a runner onto a circulating casting belt of a horizontal strip casting facility in the presence of inert gas, solidifies to form a pre-strip with a thickness between 6 to 20 mm, and after thorough solidification the pre-strip undergoes a hot rolling process, characterized in that the casting belt is caused to locally vibrate, with the heat transfer as well as the contact (surface area, time) between the strand solidifying to form a pre-strip and the casting belt is reduced.
2. Method according to claim 1, characterized in that the casting belt is excited electromagnetically.
3. Method according to claim 1-2, characterized in that a gas is fed between runner and casting belt before charging the melt.
4. Method according to claim 3, characterized in that the gas is a mixed gas of an inert gas as carrier and a reducing gas.
5. Method according to claim 4, characterized in that the reducing gas is hydrogen. AMENDED SHEET
6. Device for producing hot metallic strips, in particular of lightweight structural steel, according to the method of claims 1-6, comprising a feed vessel which contains the melt and has a horizontal runner, a primary cooling zone which is comprised of two deflection pulleys and a circulating cooled casting belt and is followed by a secondary cooling zone which is comprised of an enclosed roller table and is followed by a first roll stand, characterized in that the casting belt (1) is provided with a structure, and that an apparatus (10) is arranged beneath the casting belt (1) to excite vibrations.
7. Device according to claim 6, characterized in that the structure has embossments (5) extending in length direction.
8. Device according to claim 6, characterized in that the structure has nubs distributed across the surface.
9. Device according to claim 8, characterized in that the apparatus is an electromagnetic apparatus.
10. Device according to claim 9, characterized in that the electromagnetic apparatus is installed at a site in the region of the already solid casting shell. AMENDED SHEET
11. Device according to claim 6, characterized in that a hollow body (12) is arranged in the region of the leading defection pulley (11) of the strip casting facility beneath the runner (8) transversely to the casting belt (1) and has a broad slit, for connection with a gas feed line (14).
12. Device according to claim 11, characterized in that the hollow body (12) extends across the entire width of the casting belt (1).
13. Device according to claim 11 and 12, characterized in that there is a seal which is arranged beneath the discharge zone of the hollow body (12) and which is connected with the hollow body (12) and rests upon the casting belt (1).
14. Device according to claim 13, characterized in that the seal is a brush (13). AMENDED SHEET
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005062854.0 | 2005-12-23 | ||
| DE102005062854A DE102005062854A1 (en) | 2005-12-23 | 2005-12-23 | Method and device for producing metallic hot strips, in particular made of lightweight steel |
| PCT/DE2006/002082 WO2007071225A1 (en) | 2005-12-23 | 2006-11-22 | Method and device for producing hot metallic strip, in particular from lightweight structural steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2006329116A1 true AU2006329116A1 (en) | 2007-06-28 |
| AU2006329116B2 AU2006329116B2 (en) | 2011-07-14 |
Family
ID=37735169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006329116A Ceased AU2006329116B2 (en) | 2005-12-23 | 2006-11-22 | Method and device for producing hot metallic strip, in particular from lightweight structural steel |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20090266503A1 (en) |
| EP (1) | EP1965938B1 (en) |
| KR (1) | KR101380698B1 (en) |
| CN (1) | CN101346202B (en) |
| AT (1) | ATE482780T1 (en) |
| AU (1) | AU2006329116B2 (en) |
| DE (2) | DE102005062854A1 (en) |
| RU (1) | RU2397042C2 (en) |
| UA (1) | UA87787C2 (en) |
| WO (1) | WO2007071225A1 (en) |
| ZA (1) | ZA200805573B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2406023A1 (en) * | 2009-03-11 | 2012-01-18 | Salzgitter Flachstahl GmbH | Method for producing a hot rolled strip and hot rolled strip produced from triplex lightweight steel |
| KR101563606B1 (en) | 2009-03-11 | 2015-10-27 | 잘쯔기터 플래시슈탈 게엠베하 | Method for producing a hot rolled strip and hot rolled strip produced from ferritic steel |
| DE102009012984B4 (en) * | 2009-03-12 | 2013-05-02 | Salzgitter Flachstahl Gmbh | Casting nozzle for a horizontal strip casting plant |
| DE102009012985A1 (en) * | 2009-03-12 | 2010-09-23 | Salzgitter Flachstahl Gmbh | Casting nozzle for a horizontal strip casting plant |
| DE102009038974B3 (en) | 2009-08-21 | 2010-11-25 | Salzgitter Flachstahl Gmbh | Method for producing steel hot strip with material characteristics adjustable over the band cross-section, comprises applying a steel melt by a casting groove on a running casting band of a horizontal strip casting plant |
| DE102011010040B3 (en) | 2011-02-02 | 2012-08-02 | Salzgitter Flachstahl Gmbh | Method and device for producing a cast strip of steel with material properties adjustable over the strip cross section and the strip length |
| DE102011056930A1 (en) * | 2011-12-22 | 2013-06-27 | Borgwarner Beru Systems Gmbh | Electric heater |
| DE102012013425A1 (en) | 2012-07-03 | 2014-01-09 | Salzgitter Flachstahl Gmbh | Continuous strip casting and rolling plant |
| DE102015215961A1 (en) | 2015-08-21 | 2017-02-23 | Schaeffler Technologies AG & Co. KG | Device for force simulation on an actuating element of a vehicle, preferably a pedal force simulator |
| DE102015114725B3 (en) * | 2015-09-03 | 2016-12-08 | Salzgitter Flachstahl Gmbh | Melt feed system for a horizontal strip caster |
| DE102016116711A1 (en) | 2016-09-07 | 2018-03-08 | Salzgitter Flachstahl Gmbh | Method for producing a metal strip on a horizontal strip casting plant |
| DE102017105570A1 (en) * | 2017-03-15 | 2018-09-20 | Salzgitter Flachstahl Gmbh | Horizontal strip caster with optimized casting belt |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2597046A (en) * | 1948-06-25 | 1952-05-20 | Sendzimir Tadeusz | Method of producing tubular and sheet metals |
| CH633206A5 (en) * | 1978-11-03 | 1982-11-30 | Alusuisse | CHOCOLATE WITH Roughened Surface For Casting Metals. |
| US4582117A (en) * | 1983-09-21 | 1986-04-15 | Electric Power Research Institute | Heat transfer during casting between metallic alloys and a relatively moving substrate |
| DE3423834A1 (en) * | 1984-06-28 | 1986-01-09 | Mannesmann AG, 4000 Düsseldorf | METHOD AND DEVICE FOR CONTINUOUSLY POURING METAL MELT, IN PARTICULAR STEEL MELT |
| JPH02112854A (en) * | 1988-10-20 | 1990-04-25 | Nippon Steel Corp | Continuous metal ribbon casting equipment |
| CN2133386Y (en) * | 1992-07-27 | 1993-05-19 | 北京科技大学 | Step-by-step slot type continuous casting machine |
| JP3100798B2 (en) * | 1993-06-08 | 2000-10-23 | 新日本製鐵株式会社 | Quenched metal strip manufacturing equipment |
| DE4344954C1 (en) * | 1993-12-27 | 1995-06-14 | Mannesmann Ag | Conveyor belt of a continuous strip caster for casting strips of metal |
| DE69621351T2 (en) | 1995-10-16 | 2003-01-09 | Alcoa Inc., Pittsburgh | CASTING BELTS FOR CASTING METALS, METHOD FOR THE PRODUCTION AND USE THEREOF |
| DE19824366A1 (en) * | 1998-05-30 | 1999-12-02 | Schloemann Siemag Ag | Strand guide segment for slab caster |
| CN2586549Y (en) * | 2002-12-05 | 2003-11-19 | 宁夏惠冶镁业有限公司 | Semi-sealed cooling type continuous casting machine |
-
2005
- 2005-12-23 DE DE102005062854A patent/DE102005062854A1/en not_active Withdrawn
-
2006
- 2006-11-22 RU RU2008130392/02A patent/RU2397042C2/en not_active IP Right Cessation
- 2006-11-22 UA UAA200809615A patent/UA87787C2/en unknown
- 2006-11-22 KR KR1020087018097A patent/KR101380698B1/en not_active Expired - Fee Related
- 2006-11-22 DE DE502006007992T patent/DE502006007992D1/en active Active
- 2006-11-22 CN CN2006800488184A patent/CN101346202B/en not_active Expired - Fee Related
- 2006-11-22 AU AU2006329116A patent/AU2006329116B2/en not_active Ceased
- 2006-11-22 EP EP06818104A patent/EP1965938B1/en not_active Not-in-force
- 2006-11-22 US US12/158,832 patent/US20090266503A1/en not_active Abandoned
- 2006-11-22 AT AT06818104T patent/ATE482780T1/en active
- 2006-11-22 WO PCT/DE2006/002082 patent/WO2007071225A1/en not_active Ceased
-
2008
- 2008-06-25 ZA ZA200805573A patent/ZA200805573B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN101346202B (en) | 2011-12-07 |
| EP1965938B1 (en) | 2010-09-29 |
| AU2006329116B2 (en) | 2011-07-14 |
| RU2008130392A (en) | 2010-01-27 |
| RU2397042C2 (en) | 2010-08-20 |
| ZA200805573B (en) | 2009-04-29 |
| KR20080089433A (en) | 2008-10-06 |
| DE102005062854A1 (en) | 2007-07-05 |
| DE502006007992D1 (en) | 2010-11-11 |
| KR101380698B1 (en) | 2014-04-02 |
| EP1965938A1 (en) | 2008-09-10 |
| CN101346202A (en) | 2009-01-14 |
| US20090266503A1 (en) | 2009-10-29 |
| WO2007071225A1 (en) | 2007-06-28 |
| ATE482780T1 (en) | 2010-10-15 |
| UA87787C2 (en) | 2009-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DA3 | Amendments made section 104 |
Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE NAME OF THE CO-INVENTORS TO READ FROM: SCHMIDT-JURGENSEN, RUNE TO: SCHMIDT-JUERGENSEN, RUNE AND FROM: SCHAPERKOTTER, MARKUS TO: SCHAEPERKOETTER, MARKUS |
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| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |