EP0904873B2 - Trichtergeometrie einer Kokille zum Stranggiessen von Metall - Google Patents
Trichtergeometrie einer Kokille zum Stranggiessen von Metall Download PDFInfo
- Publication number
- EP0904873B2 EP0904873B2 EP98117587A EP98117587A EP0904873B2 EP 0904873 B2 EP0904873 B2 EP 0904873B2 EP 98117587 A EP98117587 A EP 98117587A EP 98117587 A EP98117587 A EP 98117587A EP 0904873 B2 EP0904873 B2 EP 0904873B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- chill mould
- side walls
- sections
- concave
- mold
- 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
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
- B22D11/0406—Moulds with special profile
-
- 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
- B22D11/0408—Moulds for casting thin slabs
Definitions
- the invention relates to a mold for the continuous casting of metal with a cooled Breitrate- and narrow side walls having funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Symposium.
- the dimensions of the pouring area are determined essentially by the cross section of the strand to be cast, the dimensions of the pouring tube and its immersion depth in the melt.
- the strand shell Due to the funnel-shaped shaping of the broad side walls not only a taper, but also a change in shape of the strand cross-section takes place in the casting direction. As a result, in contrast to a conventional continuous casting mold with flat walls, the strand shell is forced through additional deformations when passing through a funnel mold. In order to prevent the formation of surface defects of the cast product, these additional deformations must not exceed a certain limit, so that the strand shell is not overloaded and ensures a uniform over the strand cross-section heat dissipation.
- the EP 0 268 910 B1 proposes that the strand shell, which is still thin below the casting level, be guided without deformation, in that the broad side walls run essentially parallel to one another in a first section in the pouring region and are returned to the thickness of the casting format in an adjoining section, the first section reaching below the first in the casting operation to be set Gitty Spiegelebene in the range of the first strand shell formation ranges.
- the entire strain imposed by the mold on the strand which is required for the reduction of the strand to the thickness of the casting mold, extends to the subsequent section, which is formed by inclined or curved surfaces or combination thereof.
- the EP 0 552 501 A2 discloses a mold for continuous casting of steel strip, in which the wide side walls form a funnel-shaped Eingello Scheme which is reduced to the narrow side walls and in the casting direction on the format of the cast strip.
- the curvature of the funnel-shaped Eingello Schemees is determined by lateral arcs and at tangent points with these associated central circular arcs.
- the radii of the lateral arcs are formed in a constant at least 100 mm from the mold top edge downwardly extending portion.
- the DE 39 07 351 A1 discloses a proposal to form the pouring funnel of a mold so that the deformation of the metal casting is distributed over a maximum distance and constrictions and cracks in the strand shell of Metallg screensstranges be avoided. This is achieved in that the contour of the inner wall of the pouring funnel is formed in the strand passage direction by three tangentially touching circular arcs whose radii, gradually increasing in strand passage direction, pass into the contour of the inner wall of the mold. The most uniform possible distribution of the change in shape of the strand shell in such a molded Eing man Silverbrook is achieved in that increase their radii in the strand passage direction with the same or unequal factor.
- the present invention seeks to provide a further funnel geometry of a mold, by which friction and wear between strand shell and mold walls even better reduced and especially in the strand shell formation of a relatively high shrinkage prone steel an even clearer reduction of error the slab surface is realized as a result of a uniform as possible adjustment of the change in shape.
- the invention is based on the finding that in the pouring region the change in length of the mold contour caused by the transition from a horizon to an underlying horizon has a maximum on each horizon and that this maximum is an above-average local deformation or increased tendency to local gap formation between strand and mold wall equivalent. It follows that the Eing sheet Silverbrook has at least a maximum of the change in length of the horizontal Kokillenkontur and that the most uniform distribution of the change in shape over the Eing devis Anlagen is achieved in that this maximum is minimized.
- the inner contours of the broad side walls in the casting direction from top to bottom at least two points with the property that they determine a straight line along which the inner contours of these broad side walls with at least one concave and are formed at least a convex portion of any sequence.
- the inner contours of the broad side walls along a straight line drawn from the upper mold edge to Kokillenunterkante straight in the casting direction from top to bottom are formed with at least one concave portion and at least one convex portion.
- the object is achieved with the invention also in that in the funnel area, the inner contours of the broad side walls along a top edge and the beginning of the lower vertical portion of the broad side walls connecting straight lines in the casting direction from top to bottom with at least one concave portion and at least one convex portion are formed.
- concave sections and convex sections of the broad side walls can merge into one another directly.
- each of the concave sections or the convex sections of the broad side walls may advantageously have both a constant as well as a variable curvature in the course thereof.
- An embodiment of the invention provides that the inner contours of the broad side walls on the concave or on the convex portions have a circular arc shape or a trigonometric, for example, a sinusoidal shape.
- funnel geometry results from the measure that the curvatures of the individual sections of the broad side walls are formed with such radii that the largest local change in length delta max (% / m) at the transition from a horizon to an underlying horizon four times the value over the funnel area without taking account of parallel-walled sections averaged local length changes, in particular a value of 2.0% / m does not exceed.
- the invention provides a use of the claimed mold for the continuous casting of relatively to extremely high shrinkage prone to peritectic carbon steels and austenitic stainless steels.
- Fig. 1 three different funnel contours of the broad side wall of a mold have a funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Club A or a funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Club B and a subsequent substantially parallelwandigen area C.
- This Kokillen Scheme or Kokillenaustritt must not have parallel exit surfaces or exit edges.
- the lower mold area or the lower Kokillenauscher may well have a small curvature of 1 to 15 mm per broad side wall in the central region.
- the funnel contours of the broad side walls 4 are formed from top to bottom along a straight line connecting the upper mold edge 1 and the lower mold edge 3, first with a concave portion a and subsequently with a convex portion b. It can be seen that the inner contour 4 of the broad side walls has a sinusoidal profile over the sections a and b.
- the funnel contours of the broad side walls 4 'and 4''along a top edge 1 and the beginning of the parallel-walled area 2 connecting straight line from top to bottom first with a concave section a' and a '' and then with a convex portion b 'and b''andc''formed.
- the inner contours 4 'and 4 "of the broad side walls have a sinusoidal profile over the sections a' and b 'or a" and b ".
- Fig. 1 also shows that the convex portion b '' with a terminal lower circular arc c '' in the parallel-walled portion d '' merges with a steady course.
- Essential for the funnel geometry is also the measure that each of the concave sections a, a 'and a''and the convex sections b, b' and b '' both a constant in their course, as well as have a variable curvature.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Crushing And Grinding (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742795A DE19742795A1 (de) | 1997-09-27 | 1997-09-27 | Trichtergeometrie einer Kokille zum Stranggießen von Metall |
DE19742795 | 1997-09-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0904873A1 EP0904873A1 (de) | 1999-03-31 |
EP0904873B1 EP0904873B1 (de) | 2002-07-03 |
EP0904873B2 true EP0904873B2 (de) | 2011-10-26 |
Family
ID=7843886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98117587A Expired - Lifetime EP0904873B2 (de) | 1997-09-27 | 1998-09-16 | Trichtergeometrie einer Kokille zum Stranggiessen von Metall |
Country Status (10)
Country | Link |
---|---|
US (1) | US6186220B1 (xx) |
EP (1) | EP0904873B2 (xx) |
JP (1) | JP4289702B2 (xx) |
KR (1) | KR100594624B1 (xx) |
CN (1) | CN1106238C (xx) |
AT (1) | ATE219976T1 (xx) |
DE (2) | DE19742795A1 (xx) |
ES (1) | ES2183267T5 (xx) |
TW (1) | TW380064B (xx) |
ZA (1) | ZA988657B (xx) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100490985B1 (ko) * | 2000-11-25 | 2005-05-24 | 주식회사 포스코 | 연속주조용 깔대기형 주형동판 |
WO2002064286A2 (de) * | 2001-02-09 | 2002-08-22 | Egon Evertz K.G. (Gmbh & Co) | Stranggiesskokille |
DE10106328A1 (de) * | 2001-02-09 | 2002-08-14 | Evertz Egon Kg Gmbh & Co | Stranggießkokille |
AT410766B (de) * | 2001-09-28 | 2003-07-25 | Voest Alpine Ind Anlagen | Durchlaufkokille |
US6975877B1 (en) | 2001-10-17 | 2005-12-13 | Cisco Technology, Inc. | System and method for synchronizing clock dividers in a wireless network |
KR100940679B1 (ko) * | 2002-12-27 | 2010-02-08 | 주식회사 포스코 | 박슬라브 연속주조용 깔대기형 주형 |
CN1292858C (zh) * | 2004-01-17 | 2007-01-03 | 宝山钢铁股份有限公司 | 一种水冷的金属连铸结晶器 |
JP5018274B2 (ja) * | 2007-06-28 | 2012-09-05 | 住友金属工業株式会社 | 丸ビレット鋳片の連続鋳造用鋳型および連続鋳造方法 |
SG2012079117A (en) | 2012-10-24 | 2014-05-29 | Pratt & Whitney Services Pte Ltd | Casting funnel |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0865849A1 (de) † | 1997-03-17 | 1998-09-23 | Sms Schloemann-Siemag Aktiengesellschaft | Oszillierende Kokille zum Stranggiessen von Brammen |
WO1999001244A1 (de) † | 1997-06-30 | 1999-01-14 | Sms Demag Ag | Verfahren und vorrichtung zum erzeugen von dünnbrammen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH617608A5 (xx) * | 1977-04-06 | 1980-06-13 | Concast Ag | |
FR2583662B1 (fr) * | 1985-06-25 | 1987-09-25 | Clecim Sa | Procede et machine de coulee continue d'un produit metallique mince |
DE3640525C2 (de) * | 1986-11-27 | 1996-02-15 | Schloemann Siemag Ag | Kokille zum Stranggießen von Stahlband |
JPH02207945A (ja) * | 1989-02-08 | 1990-08-17 | Sumitomo Metal Ind Ltd | 丸型鋳片の連続鋳造用モールド |
DE3907351C2 (de) | 1989-03-08 | 1998-09-24 | Schloemann Siemag Ag | Eingießtrichter einer Kokille |
FR2645463B1 (fr) * | 1989-04-06 | 1991-05-31 | Techmetal Promotion | Procede et installation de coulee de produits metalliques minces |
JPH02284747A (ja) * | 1989-04-24 | 1990-11-22 | Sumitomo Metal Ind Ltd | 連続鋳造用モールド |
JPH04172153A (ja) * | 1990-11-06 | 1992-06-19 | Kawatetsu Techno Res Corp | 連続鋳造方法及びその装置 |
DE4201363C2 (de) | 1992-01-20 | 2000-08-10 | Sms Demag Ag | Kokille zum Stranggießen von Stahlband |
JP2972051B2 (ja) * | 1993-04-15 | 1999-11-08 | 住友重機械工業株式会社 | 鋼の連続鋳造用鋳型および連続鋳造方法 |
IT1267244B1 (it) * | 1994-05-30 | 1997-01-28 | Danieli Off Mecc | Procedimento di colata continua per acciai ad alto contenuto di carbonio |
IT1267243B1 (it) * | 1994-05-30 | 1997-01-28 | Danieli Off Mecc | Procedimento di colata continua per acciai peritettici |
US5927378A (en) * | 1997-03-19 | 1999-07-27 | Ag Industries, Inc. | Continuous casting mold and method |
-
1997
- 1997-09-27 DE DE19742795A patent/DE19742795A1/de not_active Withdrawn
-
1998
- 1998-09-16 EP EP98117587A patent/EP0904873B2/de not_active Expired - Lifetime
- 1998-09-16 ES ES98117587T patent/ES2183267T5/es not_active Expired - Lifetime
- 1998-09-16 DE DE59804640T patent/DE59804640D1/de not_active Expired - Lifetime
- 1998-09-16 AT AT98117587T patent/ATE219976T1/de active
- 1998-09-17 US US09/154,908 patent/US6186220B1/en not_active Expired - Lifetime
- 1998-09-22 ZA ZA989657A patent/ZA988657B/xx unknown
- 1998-09-25 JP JP27174698A patent/JP4289702B2/ja not_active Expired - Fee Related
- 1998-09-26 CN CN98125062A patent/CN1106238C/zh not_active Expired - Fee Related
- 1998-09-26 KR KR1019980040129A patent/KR100594624B1/ko not_active IP Right Cessation
- 1998-12-03 TW TW087120047A patent/TW380064B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0865849A1 (de) † | 1997-03-17 | 1998-09-23 | Sms Schloemann-Siemag Aktiengesellschaft | Oszillierende Kokille zum Stranggiessen von Brammen |
WO1999001244A1 (de) † | 1997-06-30 | 1999-01-14 | Sms Demag Ag | Verfahren und vorrichtung zum erzeugen von dünnbrammen |
Also Published As
Publication number | Publication date |
---|---|
ES2183267T5 (es) | 2012-01-24 |
CN1106238C (zh) | 2003-04-23 |
DE59804640D1 (de) | 2002-08-08 |
ATE219976T1 (de) | 2002-07-15 |
JPH11156488A (ja) | 1999-06-15 |
DE19742795A1 (de) | 1999-04-01 |
EP0904873A1 (de) | 1999-03-31 |
ZA988657B (en) | 1999-06-04 |
JP4289702B2 (ja) | 2009-07-01 |
US6186220B1 (en) | 2001-02-13 |
EP0904873B1 (de) | 2002-07-03 |
ES2183267T3 (es) | 2003-03-16 |
KR100594624B1 (ko) | 2006-08-30 |
TW380064B (en) | 2000-01-21 |
CN1220195A (zh) | 1999-06-23 |
KR19990030178A (ko) | 1999-04-26 |
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