US20110114282A1 - Modular strand guide roller - Google Patents

Modular strand guide roller Download PDF

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Publication number
US20110114282A1
US20110114282A1 US13/000,725 US200913000725A US2011114282A1 US 20110114282 A1 US20110114282 A1 US 20110114282A1 US 200913000725 A US200913000725 A US 200913000725A US 2011114282 A1 US2011114282 A1 US 2011114282A1
Authority
US
United States
Prior art keywords
roller
strand guide
flow channel
channels
flow channels
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
Application number
US13/000,725
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English (en)
Inventor
Erich Hovestadt
Peter Jonen
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 Siemag AG
Original Assignee
SMS Siemag 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 SMS Siemag AG filed Critical SMS Siemag AG
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JONEN, PETER, HOVESTADT, ERICH
Publication of US20110114282A1 publication Critical patent/US20110114282A1/en
Abandoned legal-status Critical Current

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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
    • B22D11/12—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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00—Elements specially adapted for movement
    • F28F5/02—Rotary drums or rollers

Definitions

  • the invention concerns a modularly constructed strand guide roller for the strand guide unit of a continuous casting plant in accordance with the features of the preamble of claim 1 , a strand guide roller in accordance with the features of claim 13 , and a method for operating it in accordance with claim 14 .
  • a strand guide roller is known from EP 1 485 218 B1, which, however, proceeding from the objective of the invention, focuses on a rotary leadthrough for a cooling water inlet and outlet of a support and/or transport roller pivoted at least at the end with journals in bearing blocks, especially in a continuous casting plant.
  • the outer region of the water-cooled support and/or transport roller has axial channels and channels that run into or out of these axial channels and to a central distribution system.
  • the central distribution system consists of a central bore in the support and/or transport roller and of a tubular line arranged therein, which has a central supply channel for the cooling water and with the central bore forms an annular channel for the removal of the cooling water.
  • the strand guide roller disclosed in the cited document consists of two or more roller segments, each of which is supported at its end. This type of end bearing of the individual roller segments is expensive and entails considerable labor for the assembly and disassembly of the bearing units during maintenance of the strand guide unit.
  • WO 2007/121821 A1 discloses a strand guide roller of a strand guide unit that consists of at least two roller sections, on which a strand cast by a continuous casting machine is guided, according to which a plug connection is formed between the two roller segments, and only one bearing is provided, which is designed as an undivided single bearing.
  • the sole cooling medium flow channel which runs centrally over essentially the whole width of the strand guide roller, fails to develop a sufficient cooling effect for the strand guide roller.
  • the centrally running flow channel serves primarily to cool the inner rings of the bearing in the area of the journal of the strand guide roller or the roller segments.
  • the internally cooled strand guide roller additionally disclosed by the documents WO 2004/094087 A1 and EP 1 646 463 B1 comprises a central rotatable shaft and several roller shells that have integrated coolant channels and are secured against rotation and supported on the shaft. Practical experience shows that these strand guide rollers with roller shells slipped onto them not only show unsatisfactory cooling of the roller barrels but also an enormously high proportion of sealing elements and thus do not represent a maintenance-friendly and operationally reliable solution.
  • the objective of the invention is to create a modularly constructed strand guide roller which can be changed over to different continuous casting widths without any great effort and which has a cooling effect that extends from the core region to the region near the surface and thus improves the service life of the strand guide roller.
  • a further objective of the invention is to create a modularly constructed strand guide roller that allows comparatively low-cost maintenance.
  • Yet another objective of the invention is to create a strand guide unit with strand guide rollers that are improved with respect to increased service life and easier maintenance.
  • the modularly constructed strand guide roller for the strand guide unit of a continuous casting plant comprises
  • the flow channels formed in the region near the surface of each roller module are present in pairs.
  • the coolant flows in the opposite direction from the coolant that flows in the centrally running flow channels
  • the coolant flows in the same direction as the coolant that flows in the centrally running flow channels.
  • An open coolant circulation is thus formed in each roller module.
  • a chamber is formed, which serves to deflect the coolant within the first roller module and the following roller module. The chambers are tightly sealed from the outside with a cover, so that no coolant can escape.
  • first flow channel of each pair of flow channels is connected by a corresponding first connecting channel with the first centrally running flow channel
  • second flow channel of each pair of flow channels is connected by a corresponding second connecting channel with the second centrally running flow channel.
  • connection is produced, for one thing, in such a way that the first connecting channel connects the supply-side outlet of the first centrally running flow channel with the discharge-side inlet of the respective flow channel of the paired flow channels, and, for another, in such a way that the second connecting channel connects the supply-side outlet of the second respective flow channel of the paired flow channels with the discharge-side inlet of the second centrally running flow channel.
  • the second centrally running flow channel of the first roller module and the first centrally running flow channel of the second roller module are connected by a coupling sleeve, so that the coolant can flow from the second centrally running flow channel of the first roller module into the first centrally running flow channel of the second roller module.
  • the second roller module and each additional roller module of the strand guide roller is, where the totality of the construction of the flow channels and connecting channels is concerned, constructed identically to the first roller module.
  • a first open coolant circulation is joined with a second open coolant circulation to form a common open coolant circulation, such that the first coolant circulation can be connected to a coolant inlet, and the second coolant circulation can be connected to a coolant outlet.
  • the modularly constructed strand guide roller makes it possible for the first time to construct a strand guide roller for different continuous casting widths, which is adequately cooled both in the core region and in the region near the surface.
  • the design of the flow channels in accordance with the invention allows overall improved cooling of the strand guide roller with the result that the service life of the roller is increased and that the spectrum of steel grades that can be cast is expanded.
  • peripheral flow channels With a helical arrangement of the peripheral flow channels, they can be arranged and operated in groups, e.g., as a multiple thread. A first group could then be used for the forward movement of the coolant and a second group for its return movement.
  • a variable or alternating flow direction of the coolant in adjacent strand guide rollers, adjacent roller segments, or in upper and lower frames of a segment helps to even out the cooling effect on the strand or slab.
  • FIG. 1 is a cross-sectional drawing, along sectional line A-A in FIG. 4 , of a strand guide roller that consists of three roller modules.
  • FIG. 2 shows detail “Z” in FIG. 1 with an enlarged view of the flow channels and connecting channels that convey the stream of coolant from the core region to the region near the surface.
  • FIG. 3 is a cross section of the strand guide roller in an enlarged view along line D-D in FIG. 1 .
  • FIG. 4 is a cross section of the strand guide roller in an enlarged view along line B-B in FIG. 1 .
  • FIG. 5 is a view of the second or middle roller module in direction “A” in FIG. 6 .
  • FIG. 6 shows the second or middle roller module of the strand guide roller in the longitudinal section along line C-C in FIG. 5 .
  • FIG. 7 is a side view of the second or middle roller module of the strand guide roller according to FIG. 6 .
  • the strand guide roller 1 shown in FIG. 1 consists of a first roller module 2 , a second roller module 3 , and a third roller module 4 . All of the roller modules are assembled into a strand guide roller according to the prior-art document WO 2007/121821, specifically, by a first plug connection between the second or middle roller module 3 and the inner roller journal 2 . 1 of the first roller module 2 and by a second plug connection between the third roller module 4 and the inner roller journal 3 . 1 of the second or middle roller module 3 .
  • the inner roller journal 2 . 1 of the first roller module 2 is mounted in an undivided middle bearing 5
  • the inner roller journal 3 . 1 of the second or middle roller module 3 is mounted in an undivided middle bearing 6 .
  • Both of the middle bearings 5 , 6 are advantageously designed relatively short in their axial extent, which means that the transition region 7 between the roller modules 2 , 3 and 3 , 4 are likewise designed relatively short, so that advantageously a bulging of the cast metal strand (slab) is minimized or greatly reduced.
  • the outer roller journal 2 . 2 of the roller module 2 and the outer roller journal 4 . 1 of the roller module 4 of the strand guide roller 1 are each mounted in an outer bearing 8 and 9 , respectively.
  • the second or middle roller module 3 is not mounted in the middle bearing 5
  • the third roller module 4 is not mounted in the middle bearing 6 .
  • a plug connection for example, is provided as the means of connection between the respective roller modules 2 , 3 and 3 , 4 .
  • the roller modules 3 and 4 have a recess 10 on their end face that faces the first roller module 2 and the second roller module 3 , respectively.
  • a component 23 for example, one with an annular design, is inserted into this recess in such a way that it is secured against rotation.
  • An extension 2 . 1 . 1 or 3 . 1 . 1 of the respective roller journal is machine-faced relative to the roller journal itself and can be connected in a positive-locking way with the component 23 . Further details of the positive-locking connection or plug connection will not be discussed here, since these are not objects of the present invention.
  • each roller module 2 , 3 , 4 has a first and second centrally running flow channel 11 and 12 , respectively.
  • the flow channel 11 of the roller module 2 can be connected to a coolant inlet 13
  • the flow channel 12 of the roller module 4 can be connected to a coolant outlet 14 .
  • each of the roller modules has additional flow channels and connecting channels, which, together with the centrally running flow channels 11 , 12 , form an open coolant circulation in each roller module 2 , 3 , 4 and, ultimately, in each strand guide roller 1 designed in accordance with the invention.
  • axially running flow channels 15 , 16 are formed in the region near the surface of the outer periphery of each roller module 2 , 3 , 4 that guides and supports the metal strand.
  • First connecting channels 17 and second connecting channels 18 connect the axially running flow channels 15 , 16 with the centrally running flow channels 11 , 12 to form an open coolant circulation.
  • the coolant circulation is formed in such a way that, as FIG. 3 shows, the flow channels 15 , 16 are arranged in pairs in the region near the surface, and, specifically, are preferably regularly distributed around the periphery, where one of the flow channels of the paired flow channels 15 , 16 is connected by the connecting channel 17 with the supply-side outlet 11 . 1 of the flow channel 11 , and the other flow channel of the paired flow channels 15 , 16 is connected by the connecting channel 18 with the discharge-side inlet 12 . 1 of the flow channel 12 .
  • the paired flowed channels 15 , 16 are each sealed at the end, individually or together, by covers 19 and 27 in such a way that these ensure a change in the direction of flow of the coolant in conjunction with corresponding chambers 20 formed at the end face in the given roller module.
  • a special advantage of a coolant circulation of this type is that the connecting channels 17 , 18 are placed in each roller module 2 , 3 , 4 at the journal end in the direction of the coolant inlet 13 , and thus the peripheral surface of each roller module is free of any machining process for forming connecting channels with necessarily present sealing elements.
  • each second centrally running flow channel 12 of the roller modules 2 and 3 is connected by a coupling sleeve 21 with the respective first centrally running flow channel 11 of the roller module 3 and 4 .
  • the open coolant circulation of each roller module is brought together to form an open coolant circulation of the strand guide roller 1 .
  • the direction of flow of the coolant 22 from the coolant inlet 13 to the coolant outlet 14 is indicated by directional arrows.
  • the coolant 22 flowing into the flow channel 11 of the roller module 2 flows at the end of the flow channel 11 into the connecting channel 17 and enters flow channel 15 of the paired flow channels 15 , 16 .
  • the coolant 22 is carried into flow channel 16 of the paired flow channels 15 , 16 and enters the discharge-side inlet 12 . 1 of the second centrally running flow channel 12 , from which it is carried into the first centrally running flow channel 11 of the roller module 3 via the coupling sleeve 21 .
  • FIG. 2 is an enlarged detail view of section “Z” in FIG. 1 and shows the relevant design of the flow channels and connecting channels of roller module 2 and the direction of flow of the coolant 2 .
  • the same parts in FIGS. 1 and 2 are identified by the same reference numbers.
  • FIG. 3 is a cross-sectional view along line D-D in FIG. 1 . It shows the region of the plug connection between roller module 2 and roller module 3 as well as the axially running flow channels 15 and 16 , which are arranged in pairs in the region of roller module 3 near the surface, with the cover 27 removed.
  • Each pair of flow channels 15 , 16 comprises a flow channel 15 with coolant 22 flowing in and a flow channel 16 with coolant 22 flowing out.
  • the flow channels in a paired set of flow channels 15 , 16 are connected with each other by a chamber 20 placed in the roller module.
  • the drawing shows the second centrally running flow channel 12 in the roller journal 2 . 1 of the roller module 2 .
  • FIG. 4 is a cross-sectional view of roller module 3 along line B-B in FIG. 1 with the paired flow channels 15 and 16 arranged near the surface and with the centrally arranged, first flow channel 11 .
  • FIG. 5 is a side view of roller module 3 shown in FIG. 6 .
  • the axially running flow channels 15 , 16 which are arranged in pairs in the region of the roller module 3 that is near the surface, are tightly sealed at the end with a preferably detachable individual or common cover 27 .
  • the drawing also shows the centrally running flow channel 11 , 12 of the roller module 3 .
  • the flow channel 11 is connected with the respective flow channels 15 of the paired flow channels 15 , 16 by the connecting channels 17 , which run at an acute angle, while the flow channel 12 is connected with the respective flow channels 16 of the paired flow channels 15 , 16 by the connecting channels 18 , which run at an acute angle.
  • FIG. 6 shows a longitudinal section along line C-C in FIG. 5 .
  • the roller module 3 and roller journal 3 . 1 are shown once again in a clearly understandable way. Also shown is the preferably polygonally designed extension 3 . 1 . 1 of the roller journal 3 . 1 .
  • the roller module 3 has a recess 10 , which is located on the end face that faces away from the roller journal 3 . 1 .
  • the recess 10 holds an annular component 23 , which is secured against rotation by suitable securing means 24 , for example, dowel pins.
  • the inside of the annular component 23 has a cross section that corresponds to the cross-sectional shape of the extension 2 . 1 . 1 of the roller journal 2 . 1 , for example, a polygonal shape.
  • the recess 10 is followed by a mounting bore 25 for the coupling sleeve 21 (see also FIG. 1 ).
  • the diameter of the mounting bore 25 is greater than the diameter of the centrally running flow channel 11 .
  • the extension 3 . 1 . 1 of the roller journal 3 . 1 . of the roller module 3 has a mounting bore 26 that serves the same purpose.
  • FIG. 7 is another side view of the roller module 3 shown in FIG. 6 .
  • the paired flow channels 15 , 16 are arranged around the flow channel 11 or 12 and are sealed by covers 19 .
  • a chamber 20 which is shown only in FIG. 6 , joins the paired flow channels 15 , 16 , so that the flow of the coolant 22 is deflected in it.
  • the side view also shows the polygonal design of the extension 3 . 1 . 1 as well as the mounting bore 26 for the coupling sleeve 21 and the centrally running flow channel 12 , 11 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Continuous Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US13/000,725 2008-06-26 2009-06-18 Modular strand guide roller Abandoned US20110114282A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008029944.8 2008-06-26
DE102008029944A DE102008029944A1 (de) 2008-06-26 2008-06-26 Modulare Strangführungsrolle
PCT/EP2009/004396 WO2009156093A1 (fr) 2008-06-26 2009-06-18 Rouleau de corset de guidage modulaire

Publications (1)

Publication Number Publication Date
US20110114282A1 true US20110114282A1 (en) 2011-05-19

Family

ID=40974651

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/000,725 Abandoned US20110114282A1 (en) 2008-06-26 2009-06-18 Modular strand guide roller

Country Status (11)

Country Link
US (1) US20110114282A1 (fr)
EP (1) EP2303491B1 (fr)
JP (1) JP2011525425A (fr)
KR (1) KR20110020937A (fr)
CN (1) CN102076444A (fr)
CA (1) CA2728860A1 (fr)
DE (1) DE102008029944A1 (fr)
RU (1) RU2011102741A (fr)
TW (1) TW201018535A (fr)
WO (1) WO2009156093A1 (fr)
ZA (1) ZA201008851B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102825226A (zh) * 2012-08-20 2012-12-19 中国重型机械研究院股份公司 一种扇形段自由辊冷却水配管结构
WO2015034421A1 (fr) 2013-09-04 2015-03-12 Aktiebolaget Skf Ensemble de lignes de rouleaux pour une coulée continue
CN104640650A (zh) * 2012-07-20 2015-05-20 Sms康卡斯特股份公司 用于在连铸设备中的铸坯引导的导辊以及辊子组件
US9573190B2 (en) 2012-09-28 2017-02-21 Primetals Technologies Austria GmbH Cooled strand guide roller mounted at more than one location
US20220364223A1 (en) * 2021-05-11 2022-11-17 Applied Materials, Inc. Roller for transporting a flexible substrate, vacuum processing apparatus, and method of cooling a roller

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003194A1 (de) * 2010-05-19 2011-11-24 Sms Siemag Ag Rolleneinrichtung
KR101189517B1 (ko) 2010-06-11 2012-10-10 주식회사 포스코 내부 냉각식 가이드 롤
DE102011084231A1 (de) * 2011-10-10 2013-04-11 Sms Siemag Ag Rollenlinie für eine Stranggießanlage sowie Verfahren zum Betrieb einer Rollenlinie
CN102728798B (zh) * 2012-06-29 2014-01-29 秦皇岛首秦金属材料有限公司 一种连铸机扇形段水道改造方法
RU2553139C2 (ru) * 2012-07-04 2015-06-10 Актиеболагет Скф Распределяющий элемент, роликовая линия и устройство для непрерывной разливки
RU2550446C2 (ru) * 2012-07-04 2015-05-10 Актиеболагет Скф Оболочка ролика, роликовая направляющая линия и устройство для непрерывной разливки
RU2553140C2 (ru) * 2012-07-04 2015-06-10 Актиеболагет Скф Распределяющий элемент, роликовая линия и устройство для непрерывной разливки
DE202013004842U1 (de) 2013-05-25 2013-06-05 Sms Siemag Aktiengesellschaft Rolle zum Führen eines Metallstrangs oder Metallbands
JP2015093303A (ja) * 2013-11-13 2015-05-18 新日鐵住金株式会社 連続鋳造用ロール
SE1450619A1 (sv) * 2014-05-23 2015-11-24 Skf Ab Valsmodul och valslinje för en stränggjutningsmaskin
DE102018211071A1 (de) * 2018-05-08 2019-11-14 Sms Group Gmbh Innengekühlte Stützrolle für die Strangführung einer Stranggießanlage
CN109047699A (zh) * 2018-10-24 2018-12-21 东北大学 一种凝固末端重压下循环冷却凸型辊

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US1781378A (en) * 1928-04-23 1930-11-11 Congoleum Nairn Inc Calender roll
US5649889A (en) * 1994-10-06 1997-07-22 Bethlehem Steel Corporation Stress alleviating guide roll for high temperature applications
US5651410A (en) * 1991-01-04 1997-07-29 Davy Mckee (Sheffield) Limited Cooling roll
US20040129403A1 (en) * 2003-01-08 2004-07-08 Liu Joshua C. Caster roll
US7152660B2 (en) * 2002-03-16 2006-12-26 Thyssenkrupp Stahl Ag, Inc. Rotary lead-through for the coolant inflow and outflow of a back-up and/or conveyor roller which is rotably held in a bearing arrangement at the end

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DE1811690A1 (de) * 1968-11-29 1970-07-02 Krauss Maffei Ag Kalanderwalze mit Heizkanaelen
GB9123666D0 (en) * 1991-11-07 1992-01-02 British Steel Plc Cooling of rollers
AT412327B (de) * 2003-04-23 2005-01-25 Voest Alpine Ind Anlagen Strangführungsrolle
AT412851B (de) 2003-07-18 2005-08-25 Voest Alpine Ind Anlagen Innengekühlte strangführungsrolle
DE102006040011A1 (de) 2006-04-21 2007-10-25 Sms Demag Ag Strangführungsrolle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1781378A (en) * 1928-04-23 1930-11-11 Congoleum Nairn Inc Calender roll
US5651410A (en) * 1991-01-04 1997-07-29 Davy Mckee (Sheffield) Limited Cooling roll
US5649889A (en) * 1994-10-06 1997-07-22 Bethlehem Steel Corporation Stress alleviating guide roll for high temperature applications
US7152660B2 (en) * 2002-03-16 2006-12-26 Thyssenkrupp Stahl Ag, Inc. Rotary lead-through for the coolant inflow and outflow of a back-up and/or conveyor roller which is rotably held in a bearing arrangement at the end
US20040129403A1 (en) * 2003-01-08 2004-07-08 Liu Joshua C. Caster roll

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104640650A (zh) * 2012-07-20 2015-05-20 Sms康卡斯特股份公司 用于在连铸设备中的铸坯引导的导辊以及辊子组件
US20150183027A1 (en) * 2012-07-20 2015-07-02 Sms Concast Ag Guide roller for guiding a strand in a strand casting system, and roller assembly
US9630247B2 (en) * 2012-07-20 2017-04-25 Sms Concast Ag Guide roller for guiding a strand in a strand casting system
CN102825226A (zh) * 2012-08-20 2012-12-19 中国重型机械研究院股份公司 一种扇形段自由辊冷却水配管结构
US9573190B2 (en) 2012-09-28 2017-02-21 Primetals Technologies Austria GmbH Cooled strand guide roller mounted at more than one location
WO2015034421A1 (fr) 2013-09-04 2015-03-12 Aktiebolaget Skf Ensemble de lignes de rouleaux pour une coulée continue
US20220364223A1 (en) * 2021-05-11 2022-11-17 Applied Materials, Inc. Roller for transporting a flexible substrate, vacuum processing apparatus, and method of cooling a roller
US12060634B2 (en) * 2021-05-11 2024-08-13 Applied Materials, Inc. Roller for transporting a flexible substrate, vacuum processing apparatus, and method of cooling a roller

Also Published As

Publication number Publication date
CA2728860A1 (fr) 2009-12-30
EP2303491A1 (fr) 2011-04-06
WO2009156093A1 (fr) 2009-12-30
ZA201008851B (en) 2011-08-31
TW201018535A (en) 2010-05-16
DE102008029944A1 (de) 2009-12-31
CN102076444A (zh) 2011-05-25
EP2303491B1 (fr) 2013-02-27
JP2011525425A (ja) 2011-09-22
KR20110020937A (ko) 2011-03-03
RU2011102741A (ru) 2012-08-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY

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STCB Information on status: application discontinuation

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