WO2023198475A1 - Élément réflecteur pour un couvercle d'isolation thermique - Google Patents
Élément réflecteur pour un couvercle d'isolation thermique Download PDFInfo
- Publication number
- WO2023198475A1 WO2023198475A1 PCT/EP2023/058375 EP2023058375W WO2023198475A1 WO 2023198475 A1 WO2023198475 A1 WO 2023198475A1 EP 2023058375 W EP2023058375 W EP 2023058375W WO 2023198475 A1 WO2023198475 A1 WO 2023198475A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- reflector element
- thermal insulation
- diffusion
- metallic material
- Prior art date
Links
- 238000009792 diffusion process Methods 0.000 claims abstract description 25
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 239000007769 metal material Substances 0.000 claims abstract description 17
- 238000009413 insulation Methods 0.000 claims description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 239000011135 tin Substances 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/008—Heat shields
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
Definitions
- the present invention relates to a reflector element for a thermal insulation hood for thermal insulation of a metallic rolling stock in a rolling mill and to a method for producing the reflector element according to the invention. Furthermore, the present invention relates to a thermal insulation hood for thermal insulation of a metallic rolling stock in a rolling mill, comprising the reflector element according to the invention.
- thermal insulation hoods are usually used, which are arranged in the rolling mill at different positions above and/or below a roller table for the metallic rolling stock.
- thermal insulation hoods of such systems must be positioned at a short distance from the hot rolling stock, which makes them very vulnerable to process-related damage.
- Another disadvantage is their limited application in rolling mills. It is therefore not possible to use it directly behind a continuous casting machine of a CSP® and/or a CEM system due to the high temperatures of the cast strand material of over 1100 °C.
- the present invention is based on the object of providing a reflector element for a thermal insulation hood that is improved compared to the prior art, in particular of providing a reflector element that has a high insulation efficiency and is less susceptible to degradation.
- the reflector element according to the invention which is provided for a thermal insulation hood for thermal insulation of a metallic material in a rolling mill, comprises a base layer formed from a first metallic material, which has a thermal conductivity of at least 100 W/mK, preferably at least 200 W/mK, more preferably at least 230 W/mK, and most preferably at least 400 W/mK. All thermal conductivity values in this case refer to room temperature (25 °C; 1 atm). Furthermore, the reflector element comprises a reflection layer formed from a second metallic material, which forms a reflector surface of the reflector element; and at least one diffusion-inhibiting layer arranged between the base layer and the reflection layer, which is formed from a third metallic material.
- the arrangement of the diffusion inhibiting layer inhibits the diffusion between the base layer and the reflection layer. Surprisingly, it has been shown that this can greatly limit the formation of oxygen-affinous alloys that have a high tendency to oxidation, as a result of which the reflection layer of the reflector element is less susceptible to degradation and thus retains its reflection properties over a longer period of time.
- the reflector element according to the invention can therefore also be operated at an operating temperature that is many times higher.
- the present invention also relates to a thermal insulation hood for thermal insulation of a metallic rolling stock in a rolling mill, comprising a carrier plate and a reflector element according to the invention arranged on the carrier plate.
- a thermal insulation hood designed in this way has an insulation efficiency of greater than 90% and is generally suitable for all types of exposure durations. Insulating efficiency is understood to mean the percentage of the reflected heat in relation to the heat radiated by the rolling stock surface facing the mirror surface. For short exposure periods, the thermal insulation hood according to the invention is therefore clearly superior to conventional heat-accumulating thermal insulation hoods.
- the minimum layer thickness of the reflection layer can be 0.1 to 1.0 pm due to the process. Such layer thicknesses can be achieved, for example, by means of physical vapor deposition or by means of galvanic coating processes. However, since layer thicknesses that are too small can degrade too quickly due to unavoidable diffusion processes, the layer thickness of the reflection layer should not be less than 0.5 pm. It is therefore advantageously provided that the layer thickness of the reflection layer is at least 0.5 pm, preferably at least 0.6 pm, more preferably at least 0.7 pm, even more preferably at least 0.8 pm, more preferably at least 0.9 pm, and am most preferably at least 1.0 pm.
- the reflective layer should not exceed a maximum layer thickness of 50 pm. It is therefore advantageously provided that the layer thickness of the reflection layer is a maximum of 50.0 pm, preferably a maximum of 25.0 pm, more preferably a maximum of 15.0 pm, even more preferably a maximum of 10.0 m, more preferably a maximum of 8.0 pm, and most preferably a maximum of 4.0 pm.
- the reflection layer formed from a second metallic material can advantageously be formed from one of the metals selected from the group comprising aluminum, chromium, gold, platinum, rhodium, silver and/or an alloy thereof. Such metals have a particularly high degree of reflectance of over 70%, sometimes up to over 95%, in the wavelength range from 0.8 to 6 pm. In a particularly preferred embodiment variant, the reflection layer consists of gold or silver.
- the at least one diffusion inhibiting layer arranged between the base layer and the reflection layer can be formed from one of the metals selected from the group comprising nickel, titanium, tin and/or an alloy thereof.
- the diffusion-inhibiting layer is made of nickel, since it has a particularly high compatibility with gold and silver.
- the minimum layer thickness of the diffusion-inhibiting layer can also be 0.1 to 1.0 pm depending on the process.
- the layer thickness of the diffusion inhibition layer should not be less than 0.2 ⁇ m. It is therefore advantageously provided that the layer thickness of the diffusion-inhibiting layer is at least 0.2 pm, preferably at least 0.3 pm, and most preferably at least 0.4 pm. On the other hand, there are economic and process-related considerations, so that a maximum layer thickness of 25 pm should not be exceeded. It is therefore advantageously provided that the layer thickness of the diffusion-inhibiting layer is a maximum of 25.0 pm, preferably a maximum of 15.0 pm, more preferably a maximum of 10.0 pm, and most preferably a maximum of 7.50 pm.
- the base layer In order to keep the temperature load on the reflector element in the thermal insulation hood as low as possible, the reflector element should be cooled. It is necessary that the base layer has a thermal conductivity of at least 100 W/mK (at 25 °C; 1 atm). Therefore, the base layer is preferably formed from one of the metals selected from the group comprising aluminum, gold, magnesium, molybdenum, copper, silver, tungsten, zinc and/or an alloy thereof.
- the base layer can have a layer thickness of at least 5 mm, preferably a layer thickness of at least 10 mm, more preferably a layer thickness of at least 15 mm, and most preferably a layer thickness of at least 20 mm.
- the reflector element can be cooled via a cooling fluid. It is therefore advantageously provided that the carrier plate then comprises a plurality of bores extending axially through the carrier plate, which form part of a temperature control system, in particular a cooling system.
- the reflector element can be cooled via a blower device that includes the thermal insulation hood, or via natural convection through the ambient air.
- the carrier plate is then provided with cooling fins on its side opposite the reflector element, via which the cooling performance can be improved.
- the present invention also relates to a method for producing the reflector element according to the invention, wherein a base layer formed from a first metallic material and having a thermal conductivity of at least 100 W/mK is first provided; this is then coated with at least one diffusion inhibiting layer formed from a third metallic material; and then a reflection layer made of a second metallic material is applied to the diffusion-inhibiting layer.
- the base layer is polished before coating with the diffusion-inhibiting layer, such that the surface to be coated has a surface roughness with an average roughness Ra of a maximum of 2.0 pm, more preferably with an average roughness Ra of a maximum of 1.
- the surface of the base layer has a surface roughness with an average roughness value Ra of a maximum of 0.025 pm before being coated with the diffusion inhibiting layer.
- the surface roughness can be verified using an optical measuring method in accordance with DIN EN ISO 25178 Part 6, as of 06/2010 and Part 604, as of 12/2013, using a ZYGO NewView 600S white light interferometer.
- Fig. 3 shows an embodiment variant of a thermal insulation hood in a side view
- Fig. 4 shows an embodiment variant of the thermal insulation hood shown in Figure 3 in a perspective view.
- the carrier plate 2 can, for example, consist of pure aluminum or an aluminum alloy, such as AIMgSiCu. 1, the carrier plate 2 has a thickness of 40 mm and is provided with several bores 3 which extend axially through the carrier plate 2 and form part of a temperature control system (not shown) through which the reflector element 1 is cooled can be. In the embodiment variant shown in Figure 2, however, the carrier plate 2 is provided with a plurality of cooling fins 4, which are arranged on the side opposite the reflector element 1. As indicated in Figure 2, the carrier plate 2 can also include a plurality of bores 3 which extend axially through the carrier plate 2.
- the reflector element 1 comprises a base layer 5 made of copper, which in the present case has a layer thickness of 25 mm and is connected to the carrier plate 2, for example via a screw connection. As a result, the reflector element 1 can be replaced particularly easily during maintenance in the event of a significant loss of its reflection properties.
- the reflector element 1 in the present embodiment variant comprises a reflection layer 6 made of gold with a layer thickness of 2 pm, which forms a reflector surface 7 of the reflector element 1, as well as a metallic diffusion inhibiting layer 8 arranged between the base layer 5, in particular the copper layer, and the reflection layer 6 .
- the diffusion inhibiting layer 8 consists of a 0.4 ⁇ m thick nickel layer which has been applied to the surface 9 of the copper layer 5 via physical vapor deposition.
- the surface 9 of the copper layer 5 was polished in advance in order to achieve a surface roughness of Ra 0.025 pm.
- the average roughness Ra of surface 9 was determined in accordance with DIN EN ISO 25178 Part 6, as of 06/2010 and Part 604, as of 12/2013, using a ZYGO NewView 600S white light interferometer. For a reflector element 1 designed in this way, a maximum permissible operating temperature of 200 ° C could be defined.
- FIGS 3 and 4 an embodiment variant of the thermal insulation hood 10 according to the invention is shown in two different representations.
- the reflector element 1 is arranged via the support plate 2 on a frame 11 of the thermal insulation hood 10.
- the carrier plate 2 with the cooling fins 4 forms a cooling block 12, which can be cooled via a blower unit 13.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
L'invention concerne un élément réflecteur (1) destiné à être utilisé dans un couvercle d'isolation thermique (10) pour l'isolation thermique d'un produit métallique à laminer dans un laminoir, comprenant une couche de base (5) formée à partir d'un premier matériau métallique et présentant une conductivité thermique au moins égale à 100 W/mK ; une couche réfléchissante (6) formée à partir d'un deuxième matériau métallique, qui constitue une surface réfléchissante (7) de l'élément réflecteur (1) ; ainsi qu'au moins une couche inhibitrice de diffusion (8) qui est disposée entre la couche de base (5) et la couche réfléchissante (6) et qui est formée à partir d'un troisième matériau métallique.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022203635.2 | 2022-04-11 | ||
| DE102022203635.2A DE102022203635A1 (de) | 2022-04-11 | 2022-04-11 | Reflektorelement für eine Wärmedämmhaube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023198475A1 true WO2023198475A1 (fr) | 2023-10-19 |
Family
ID=86007118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/058375 WO2023198475A1 (fr) | 2022-04-11 | 2023-03-30 | Élément réflecteur pour un couvercle d'isolation thermique |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102022203635A1 (fr) |
| WO (1) | WO2023198475A1 (fr) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059093B1 (fr) | 1981-02-23 | 1984-05-16 | Encomech Product Development Limited | Boucliers thermiques |
| EP0248674A1 (fr) | 1986-06-06 | 1987-12-09 | Encomech Engineering Services Limited | Panneau d'isolation thermique |
| EP0468716A2 (fr) | 1990-07-26 | 1992-01-29 | Allegheny Ludlum Corporation | Appareil pour isoler et conserver la chaleur |
| EP2418521A2 (fr) * | 2009-08-07 | 2012-02-15 | Almeco S.p.A. | Procédé de fabrication d'une surface à base d'aluminium hautement réfléchissant résistant à la température pour application de réflecteur solaire et pièces de réflecteur ainsi fabriquées |
| WO2015071004A1 (fr) | 2013-11-12 | 2015-05-21 | Sms Siemag Ag | Procédé de traitement de matériau chauffé |
| WO2016066562A1 (fr) * | 2014-10-27 | 2016-05-06 | Almeco Gmbh | Réflecteur de surface résistant à la chaleur et à la corrosion |
| EP3319741B1 (fr) | 2015-07-10 | 2019-12-11 | SMS Group GmbH | Dispositif d'isolation thermique |
-
2022
- 2022-04-11 DE DE102022203635.2A patent/DE102022203635A1/de active Pending
-
2023
- 2023-03-30 WO PCT/EP2023/058375 patent/WO2023198475A1/fr active Search and Examination
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059093B1 (fr) | 1981-02-23 | 1984-05-16 | Encomech Product Development Limited | Boucliers thermiques |
| EP0248674A1 (fr) | 1986-06-06 | 1987-12-09 | Encomech Engineering Services Limited | Panneau d'isolation thermique |
| EP0468716A2 (fr) | 1990-07-26 | 1992-01-29 | Allegheny Ludlum Corporation | Appareil pour isoler et conserver la chaleur |
| EP2418521A2 (fr) * | 2009-08-07 | 2012-02-15 | Almeco S.p.A. | Procédé de fabrication d'une surface à base d'aluminium hautement réfléchissant résistant à la température pour application de réflecteur solaire et pièces de réflecteur ainsi fabriquées |
| WO2015071004A1 (fr) | 2013-11-12 | 2015-05-21 | Sms Siemag Ag | Procédé de traitement de matériau chauffé |
| WO2016066562A1 (fr) * | 2014-10-27 | 2016-05-06 | Almeco Gmbh | Réflecteur de surface résistant à la chaleur et à la corrosion |
| EP3319741B1 (fr) | 2015-07-10 | 2019-12-11 | SMS Group GmbH | Dispositif d'isolation thermique |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022203635A1 (de) | 2023-10-12 |
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