EP4554740A1 - Kupferplatte mit verbesserter oberflächengeometrie - Google Patents
Kupferplatte mit verbesserter oberflächengeometrieInfo
- Publication number
- EP4554740A1 EP4554740A1 EP23733220.0A EP23733220A EP4554740A1 EP 4554740 A1 EP4554740 A1 EP 4554740A1 EP 23733220 A EP23733220 A EP 23733220A EP 4554740 A1 EP4554740 A1 EP 4554740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- surface section
- section
- copper plate
- plate
- shaped
- 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.)
- Pending
Links
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
-
- 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
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/057—Manufacturing or calibrating the moulds
Definitions
- the present invention relates to a narrow-sided copper plate for a continuous casting mold, in particular for use in a continuous casting mold, and to a continuous casting mold comprising a water tank with at least one copper plate according to the invention arranged in the water tank.
- the present invention further relates to a method for producing the copper plate according to the invention and, in a further aspect, to a method for processing a worn and/or used narrow-sided copper plate.
- Continuous casting molds for continuously casting a metal strand from a molten metallic composition, in particular a steel strand have long been known from the prior art.
- Such molds include, on the one hand, two opposing broad side walls made of copper plates with a funnel-shaped or parallel-walled pouring area which extends in the casting direction to the end of the mold. Between the two broad side walls, the molds also have two mutually arranged narrow side walls, also made of copper plates, which are usually adjustable transversely to the casting direction and via which the desired width of the metal strand can be adjusted.
- narrow side walls are subject to severe wear due to their material properties, which is increased particularly in the area of the corners of the mold by the two-dimensional cooling and at the mold outlet by the conical positioning of the narrow side walls.
- the heavy wear means that the narrow side walls have a very short service life and therefore often have to be replaced with new and/or refurbished copper plates, which affects the productivity of the continuous casting system.
- excessive wear can lead to undesirable diffusion of the copper into the outer layer of the metallic strand or the strand shell, which causes strand defects, which in turn can lead to defects on the semi-finished product in the further processing process.
- the narrow-sided copper plate disclosed herein comprises an inner, convex portion on its hot surface side, which is surrounded by two outer, flat portions.
- Another narrow-sided copper plate which is intended to prevent edge shell defects, is known from German patent DE 2007 054 911 B4.
- This includes an inner, flat sub-area and two outer sub-areas, each of which adjoins the broad side of the narrow-sided copper plate and rises from the inner sub-area towards the respective broad side.
- the present invention is based on the object of providing a narrow-sided copper plate for a continuous casting mold that is improved compared to the prior art, in particular of providing a copper plate which, on the one hand, has a lower tendency to wear and, on the other hand, has improved contact behavior.
- the object is achieved by a narrow-sided copper plate for a continuous casting mold with the features of patent claim 1, by a method for producing the copper plate with the features of patent claim 12 and by a method for processing a worn and / or used narrow-sided copper plate with the features of patent claim 13 solved.
- the copper plate according to the invention for a continuous casting mold in particular for use in a continuous casting mold, comprises a plate-shaped body with a hot surface side, which consists of an inlet-side narrow side and an outlet-side narrow side arranged axially opposite the inlet-side narrow side, as well as a first broad side and a first broad side arranged radially opposite second broadside is limited; wherein the hot surface side has a first tongue-shaped and flat surface section which extends from the inlet-side narrow side of the plate-shaped body over at least part of its axial length in the direction of the outlet-side narrow side and a first plane Are defined; and a second surface section surrounding the first surface section, the outer partial area sections of which at least adjoin the respective broad side have a lower level than the first level of the first tongue-shaped and flat surface section.
- the strand shell within the mold nestles better against the hot surface side of the copper plate according to the invention, which reduces the lifting of the strand shell from individual areas of the copper plate and thus achieves an improved cooling effect and support. Because individual areas of the copper plate are not exposed to the majority of the load, but rather the entire surface of the copper plate now supports the strand shell due to the specific surface topography, a more homogeneous contact behavior is achieved over the entire hot surface side, which significantly reduces the tendency to wear.
- the reduced wear leads to significantly longer service lives and thus to higher quality products, since, for example, the penetration of copper into the strand shell and the associated strand defects can be reduced. Furthermore, the positioning of the narrow-sided copper plates can be controlled more effectively, which also improves the slab geometry and reduces the so-called bulging of the narrow-sided copper plates.
- the term “tongue-shaped” means that the width of the first surface section, which extends from the inlet-side narrow side of the plate-shaped body over at least part of its axial length in the direction of the outlet-side narrow side, tapers.
- the first surface section can thus comprise a trapezoidal surface section or a parabolic surface section.
- the trapezoidal surface section as well as the parabolic surface section can extend directly from the inlet-side narrow side towards the outlet-side narrow side.
- the first surface section has a surface section defining the pouring area, which extends directly from the inlet-side narrow side in the direction of the outlet-side narrow side over part of its axial length and whose width corresponds to that of the plate-shaped body.
- the first surface section therefore has a surface section defining the pouring area and a trapezoidal or parabolic surface section adjacent to the pouring area.
- the axial length of the tongue-shaped and flat surface section can advantageously correspond to at least half the length of the plate-shaped body, more preferably at least 60% of the length of the plate-shaped body, even more preferably at least 70% of the length of the plate-shaped body.
- the axial length of the tongue-shaped and flat surface section is 50 to 100% of the length of the plate-shaped body.
- the axial length of the trapezoidal or parabolic surface section adjacent to the pouring area is preferably 10 to 85% of the length of the plate-shaped body.
- the second surface section the outer partial area sections of which at least adjoin the respective broad side have a lower level than the first level of the first tongue-shaped and flat surface section, can also be designed differently.
- the outer partial area sections of the second surface section adjacent to the respective broad side can have a slope running in the direction of the outlet-side narrow side.
- the gradient is preferably less than 3.0%, more preferably less than 2.0%.
- the outer partial area sections adjacent to the respective broad side can start from the respective broad side have a slope over at least part of their radial extent.
- the gradient is preferably less than 3.0%, more preferably less than 2.0%.
- the second surface section can have an inner section section arranged between the two outer section sections adjacent to the respective broad side. This can be flat and have a level that is the same as the first level of the first tongue-shaped and flat surface section.
- the inner subregion section can have a gradient starting from the outlet-side narrow side over at least part of its axial extent, which is preferably less than 3.0%, more preferably less than 2.0%.
- the inner partial area section can preferably have a gradient starting from the respective outer partial area section over at least part of its radial extent, which is advantageously less than 3.0%, more preferably less than 2.0%.
- an advantageous embodiment variant provides that the hot surface side is provided with a wear protection coating.
- a wear protection coating techniques known to those skilled in the art can be used, such as electrolytic, galvanic and/or thermal coating processes.
- the wear protection coating which may comprise one or more layers, is preferably selected from at least one of the materials comprising nickel, NiCr, Cr 3 C 2 , Ni30Cu, Ni5Al, WCCo, NiCrBSi, WCCo/NiCrBSi, Cr 3 C 2 /NiCr, NiCrZr and /or combinations thereof.
- the hot surface side can be provided with a galvanic nickel coating.
- the hot surface side can be coated with a galvanic nickel coating as an intermediate layer and then with a wear-resistant hard top layer.
- a galvanic nickel coating as an intermediate layer and then with a wear-resistant hard top layer.
- Such an intermediate layer can also be used electrolytically, via laser deposition welding, via arc spraying processes, via flame spraying processes (HVAF, HVOF) and/or others Thermal spray processes known at the time of registration can be applied.
- Nickel, NiCr, Cr3C2/NiCr, Ni30Cu, Ni5Al and/or combinations thereof are suitable as the preferred material for the intermediate layers.
- the cover layer can advantageously be applied via laser deposition welding, via arc spraying processes, via flame spraying processes (HVAF, HVOF) and/or other thermal spray processes known to those skilled in the art at the time of registration and/or galvanically and/or electrolytically.
- Preferred materials for the cover layer are selected from the series including WCCo, NiCrBSi, WCCo/NiCrBSi, Cr3C2/NiCr, NiCr and/or combinations thereof.
- the specific surface topography of the hot surface side has a particularly advantageous effect on the coatings mentioned and their wear, since the wear of these coatings is also more uniform.
- the present invention relates to a continuous casting mold comprising a water tank and at least one narrow-sided copper plate according to the invention arranged in the water tank.
- the present invention relates to a method for producing the copper plate according to the invention, wherein a plate-shaped body blank made of copper and/or a copper alloy is first provided; then on a hot surface side a first tongue-shaped and flat surface section is defined, which extends from an inlet-side narrow side of the plate-shaped body blank over at least part of its axial length in the direction of an outlet-side narrow side and has a first plane; and in a second surface section surrounding the first surface section, two outer partial area sections, each adjacent to a broad side, which have a lower level than the first level of the first tongue-shaped and flat surface section, are created by material removal.
- the present invention also relates to a method for processing a worn and/or used copper plate, which is first provided; Any wear protection coating that may be present is removed from one hot surface side; then on the hot surface side a first tongue-shaped and flat surface section, which extends from an inlet side
- the narrow side of the plate-shaped body extends over at least part of its axial length in the direction of an outlet-side narrow side and has a first plane; and in a second surface section surrounding the first surface section, two outer partial area sections, each adjacent to a broad side, which have a lower level than the first level of the first tongue-shaped and flat surface section, are created by material removal.
- Any wear protection coating that may be present can be removed from the copper plate chemically and/or mechanically, for example.
- FIG. 1 shows a first embodiment variant of the copper plate according to the invention in a perspective view
- FIG. 3 shows a third embodiment variant of the copper plate according to the invention in a perspective view
- FIG. 4 shows a fourth embodiment variant of the copper plate according to the invention in a perspective view
- Fig. 5 shows a fifth embodiment variant of the copper plate according to the invention in a perspective view
- Fig. 6 is a partial representation of a continuous casting mold.
- a copper plate 1 shows a first embodiment variant of the copper plate 1 according to the invention in a perspective view, which is preferably intended for use in a continuous casting mold 2 (see FIG. 6).
- a copper plate 1 is formed by a plate-shaped body 3, which can consist of pure copper or alternatively of a copper alloy, such as a CuCrZr, CuAg, CuZr or other copper alloy known to those skilled in the art at the time of the present application.
- the plate-shaped body 3 has a hot surface side 4, which is delimited by an inlet-side narrow side 5, an outlet-side narrow side 6 arranged axially opposite the inlet-side narrow side 5 and a first broad side 7 and a second broad side 8 arranged radially opposite the first broad side 7.
- the edge length (L1) of each broadside 7, 8 can be, for example, 900 mm.
- the hot surface side 4 of the narrow-sided copper plate 1 comprises a specific surface topography 9, which has a first tongue-shaped and flat surface section 10 which defines a first height plane; and a second surface section 11 surrounding the first surface section 10 and having a level lower than the first height level.
- the first tongue-shaped and flat surface section 10 extends from the inlet-side narrow side 5 towards the outlet-side narrow side 6 and, in the present embodiment variant, is formed by a trapezoidal surface section 12 and a rectangular surface section 13, which defines a pouring area.
- the rectangular surface section 13, which extends directly from the inlet-side narrow side 5 in the direction of the outlet-side narrow side 6 and whose width corresponds to that of the plate-shaped body 3, in the present case has an axial length (L2) of 200 mm and, like the trapezoidal surface section, is 12, flat. Accordingly, both surface sections 12, 13 in the embodiment variant shown here have no gradient on.
- the trapezoidal surface section 12 directly adjoining the rectangular surface section 13 has an axial length (L3) of 700 mm.
- the second surface section 11 surrounding the first surface section 10 has two outer partial area sections 14, 15 each adjoining the broad side 7, 8, each of which has a lower (height) level than the first level of the first surface section 10 exhibit.
- each of the two outer partial area sections 14, 15 has a slope (G1, G2, Gn) formed in the axial direction, which extends from a side edge 16, 17 of the trapezoidal surface section 12 in the direction of the narrow side 6 on the outlet side.
- each of the two outer partial area sections 14, 15 in the present case has a slope (S1, S2, Sn) formed in the radial direction, which extends from the respective broad side 7, 8 to the respective side edge 16, 17 of the trapezoidal surface section 12.
- the hot surface side 4 has the lowest point in relation to the first level of the flat first surface section 10 at the corner points (P), which has a value of -1.5 mm. Accordingly, the broadside section (G0) delimited by the side edge 16, 17 and the outlet-side narrow side 6 has the greatest gradient, which then decreases steadily according to the arrows (G1, G2, Gn). The same applies to the slope S, which has the greatest slope on the narrow side 6 on the outlet side, which then decreases steadily according to the arrows (S1, S2, Sn).
- the gradient (G) and/or the gradient (S) can be not only continuous but also stepped and/or exponential.
- FIG 2 a second embodiment variant of the copper plate 1 according to the invention is shown in a perspective view.
- the first surface section 10 is formed by a parabolic surface section 18 and the rectangular surface section 13.
- FIG 3 a third embodiment variant of the copper plate 1 according to the invention is shown in a perspective view.
- the second surface section 11 surrounding the first surface section 10 has one between the two outer partial region sections 14, 15 arranged inner partial area section 19, which in the present case has a (height) level that is the same as the first flat surface section 10.
- the inner partial area section 19 is flat in the embodiment variant shown here.
- the width (Ba) of the inner partial area section 19 can correspond to 10 - 60% of the total width (BO) of the plate-shaped body 3, which in the embodiment variants shown here (FIGS. 1 to 5) has a total width (BO) of 250 mm.
- Figure 4 shows a fourth embodiment variant of the copper plate 1 according to the invention in a perspective view.
- the parabolic section 18 has a shorter axial length (L3), which in the present case is 500 mm.
- the inner partial area section 19 has a slope (Sx) starting from the outlet-side narrow side 6, which extends to the respective side edge 16, 17 of the parabolic surface section 18.
- the middle narrow side section 6c arranged between the two outlet-side narrow side sections 6a, 6b therefore has neither a gradient nor an incline.
- the middle narrow side section 6c has a level that is 0.5 mm lower in relation to the first surface section 10.
- the hot surface side 4 has the lowest point in relation to the first level of the flat first surface section 10 at the corner points (P2), which has a value of -1.5 mm.
- P2 corner points
- the level of the hot surface side 4 corresponds to the first flat surface section 10.
- the hot surface side 4 in the present case has a value of -0.5 mm.
- 6 shows a partial representation of a continuous casting mold 2 with a water tank 21, in which two broad-side walls 22, 23 arranged opposite one another and two narrow-side copper plates 1 according to the invention arranged in between are arranged. In the present case, these are designed to be adjustable transversely to the casting direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022207234.0A DE102022207234A1 (de) | 2022-07-15 | 2022-07-15 | Kupferplatte mit verbesserter Oberflächengeometrie |
| PCT/EP2023/065263 WO2024012773A1 (de) | 2022-07-15 | 2023-06-07 | Kupferplatte mit verbesserter oberflächengeometrie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4554740A1 true EP4554740A1 (de) | 2025-05-21 |
Family
ID=86904365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23733220.0A Pending EP4554740A1 (de) | 2022-07-15 | 2023-06-07 | Kupferplatte mit verbesserter oberflächengeometrie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4554740A1 (de) |
| DE (1) | DE102022207234A1 (de) |
| WO (1) | WO2024012773A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023612A (en) | 1975-11-25 | 1977-05-17 | Inland Steel Company | Continuous casting mold and process of casting |
| AT404235B (de) * | 1995-04-18 | 1998-09-25 | Voest Alpine Ind Anlagen | Stranggiesskokille |
| DE102007054911B4 (de) | 2007-11-15 | 2015-02-05 | Thyssenkrupp Steel Europe Ag | Breitenverstellbare Kokille und Verfahren zur Herstellung eines Warmbandes |
| KR102074364B1 (ko) * | 2018-05-14 | 2020-02-06 | 주식회사 포스코 | 주형 |
| CN111745136B (zh) * | 2020-07-08 | 2022-06-10 | 中冶赛迪工程技术股份有限公司 | 一种结晶器 |
-
2022
- 2022-07-15 DE DE102022207234.0A patent/DE102022207234A1/de active Pending
-
2023
- 2023-06-07 WO PCT/EP2023/065263 patent/WO2024012773A1/de not_active Ceased
- 2023-06-07 EP EP23733220.0A patent/EP4554740A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024012773A1 (de) | 2024-01-18 |
| DE102022207234A1 (de) | 2024-01-18 |
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