ES2942672T3 - Procedure for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace space - Google Patents
Procedure for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace space Download PDFInfo
- Publication number
- ES2942672T3 ES2942672T3 ES18807218T ES18807218T ES2942672T3 ES 2942672 T3 ES2942672 T3 ES 2942672T3 ES 18807218 T ES18807218 T ES 18807218T ES 18807218 T ES18807218 T ES 18807218T ES 2942672 T3 ES2942672 T3 ES 2942672T3
- Authority
- ES
- Spain
- Prior art keywords
- reaction chamber
- gas
- oxidation
- strip
- atmosphere
- 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.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 230000003647 oxidation Effects 0.000 title claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000012159 carrier gas Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0457—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Método para la preoxidación de flejes de acero de alta resistencia. La invención se refiere a un método mejorado para la preoxidación de bandas de acero de alta resistencia en una cámara de reacción dispuesta en una cámara de horno. La cámara de reacción está sellada en una entrada de tira y una salida de tira contra el intercambio de gases entre la cámara del horno y la cámara de reacción, y se introduce un gas que forma una atmósfera oxidante en la cámara de reacción, y el gas circula continuamente dentro de la cámara de reacción. . (Traducción automática con Google Translate, sin valor legal)Method for the pre-oxidation of high-strength steel strapping. The invention relates to an improved method for the pre-oxidation of high-strength steel strips in a reaction chamber arranged in a furnace chamber. The reaction chamber is sealed at a strip inlet and a strip outlet against gas exchange between the furnace chamber and the reaction chamber, and a gas that forms an oxidizing atmosphere is introduced into the reaction chamber, and the Gas continuously circulates inside the reaction chamber. . (Automatic translation with Google Translate, without legal value)
Description
DESCRIPCIÓNDESCRIPTION
Procedimiento para la preoxidación de acero en banda en una cámara de reacción dispuesta en un espacio de un hornoProcedure for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace space
La presente invención hace referencia a un procedimiento mejorado para la preoxidación de acero en banda sensible a la oxidación, en una cámara de reacción dispuesta en un espacio de un horno, para de ese modo, para un revestimiento por inmersión en baño fundido inmediatamente consecutivo, regular propiedades de la superficie adecuadas del acero en banda que debe revestirse.The present invention relates to an improved process for the pre-oxidation of oxidation-sensitive strip steel, in a reaction chamber arranged in a furnace space, thereby, for immediately consecutive molten bath immersion coating, regulate suitable surface properties of the strip steel to be coated.
Los aceros en banda habituales, de alta resistencia, como elementos de aleación contienen manganeso, silicio y/o aluminio. Durante el recocido de recristalización posible, antes del revestimiento por inmersión en baño fundido, esos elementos de aleación se difunden hacia la superficie de la banda. Puesto que esos elementos de aleación son muy afines al oxígeno, en tanto se encuentren en la superficie de la banda o a poca profundidad en la banda, se oxidan de forma casi inevitable. Sin embargo, no se oxida el material base, el hierro. Ese fenómeno también se conoce como oxidación selectiva. Los óxidos de manganeso, de silicio y/o de aluminio formados en la superficie debido a la oxidación selectiva, sin embargo, perjudican la humectabilidad de la superficie de la banda con un metal de revestimiento fundido (por ejemplo cinc), con la consecuencia de puntos defectuosos (los así llamados puntos descubiertos), así como una mala adhesión del revestimiento a la superficie de la banda, donde para los problemas de revestimiento en el acero de alta resistencia es determinante la composición de la aleación, ante todo la tendencia a la formación de óxidos que no pueden reducirse en la superficie.Typical high-strength strip steels contain manganese, silicon, and/or aluminum as alloying elements. During possible recrystallization annealing, prior to molten bath immersion coating, these alloying elements diffuse to the strip surface. Since these alloying elements are very affinity for oxygen, whether they are at the surface of the strip or at a shallow depth in the strip, they almost inevitably oxidize. However, the base material, iron, does not rust. This phenomenon is also known as selective oxidation. Manganese, silicon and/or aluminum oxides formed on the surface due to selective oxidation, however, impair the wettability of the strip surface with a molten coating metal (for example zinc), with the consequence of defective spots (so-called bare spots) as well as poor adhesion of the coating to the strip surface, where coating problems in high-strength steel are determined by the composition of the alloy, above all the tendency to formation of oxides that cannot be reduced on the surface.
Por ejemplo, esto hace referencia a las siguientes calidades del acero:For example, this refers to the following steel grades:
Para mejorar la adhesión del revestimiento en la superficie de la banda, en la solicitud DE 102 004 059 566 se describe un procedimiento en el cual la banda se preoxida. El procedimiento descrito en ese documento puede resumirse del siguiente modo:In order to improve the adhesion of the coating to the strip surface, the application DE 102 004 059 566 describes a process in which the strip is pre-oxidized. The procedure described in that document can be summarized as follows:
1. Calentamiento de la banda bajo atmósfera reductora, con una parte de hidrógeno de 2 a 3 %, hasta 650 a 750°C.1. Heating of the strip under a reducing atmosphere, with a part of hydrogen of 2 to 3%, up to 650 to 750°C.
2. Oxidación de la superficie de la banda mayormente compuesta por hierro puro, en una cámara de reacción con una atmósfera con una parte de oxígeno de 0,01 a 1 %. De este modo se forma una capa de óxido de hierro que cubre los óxidos de la aleación antes formados. La duración del tratamiento debe ser de 1 a 10 segundos y el grosor de la capa de óxido formada debe ser de 300 nm.2. Oxidation of the surface of the strip mainly composed of pure iron, in a reaction chamber with an atmosphere with a part of oxygen from 0.01 to 1%. In this way, a layer of iron oxide is formed that covers the oxides of the alloy previously formed. The duration of the treatment should be from 1 to 10 seconds and the thickness of the oxide layer formed should be 300 nm.
3. Recocido del acero en banda bajo atmósfera reductora, con una parte de hidrógeno de 2 a 8%, hasta como máximo 900°C. De este modo, la capa de óxido de hierro se reduce nuevamente formando hierro puro, al cual después el metal del revestimiento se adhiere bien y de forma segura.3. Annealing of the strip steel under a reducing atmosphere, with a part of hydrogen from 2 to 8%, up to a maximum of 900°C. In this way, the iron oxide layer is reduced again to form pure iron, to which the metal of the coating then adheres well and securely.
De este modo, la cámara de reacción, con una atmósfera altamente oxidante en el interior, se encuentra en el espacio de un horno, de un horno continuo, con una atmósfera reductora, que contiene hidrógeno; la entrada para bandas y la salida para bandas hacia la cámara de reacción, deben estar lo mejor estanqueizadas posible contra un intercambio de gas. Un pasaje de gas desde el horno hacia la cámara de reacción provoca que el hidrógeno que penetra consuma al menos parcialmente el oxígeno requerido para la oxidación, perjudicando las propiedades de la capa de óxido deseada sobre la superficie de la banda. Este problema se agudiza cuanto menor es el contenido de oxígeno en la cámara de reacción. De forma inversa, un pasaje de gas desde la cámara de reacción hacia el horno provoca un contenido de agua más elevado (punto de rocío) en el horno y, debido a ello, un potencial de oxidación aumentado. Esto es desventajoso en particular para aceros de muy alta resistencia con una parte más elevada de elementos de la aleación afines al oxígeno. In this way, the reaction chamber, with a highly oxidizing atmosphere inside, is in the space of a furnace, a continuous furnace, with a reducing atmosphere, which contains hydrogen; The strip inlet and the strip outlet to the reaction chamber must be as well sealed as possible against gas exchange. A passage of gas from the furnace to the reaction chamber causes the penetrating hydrogen to at least partially consume the oxygen required for oxidation, impairing the properties of the desired oxide layer on the strip surface. This problem becomes more acute the lower the oxygen content in the reaction chamber. Conversely, a passage of gas from the reaction chamber to the furnace causes a higher water content (dew point) in the furnace and, therefore, an increased oxidation potential. This is disadvantageous in particular for very high-strength steels with a higher proportion of oxygen-affine alloying elements.
En los documentos WO 2016/177590 A1, WO 2012/152508 A1 y DE 10 2011 051731 A1 se describen procedimientos para la preoxidación de bandas de acero en una cámara de reacción dispuesta en un espacio de un horno.WO 2016/177590 A1, WO 2012/152508 A1 and DE 10 2011 051731 A1 describe processes for the pre-oxidation of steel strips in a reaction chamber arranged in a furnace space.
Los ensayos han demostrado que la temperatura de la banda es el parámetro decisivo para la conducción del proceso, para regular una capa de óxido deseada. La misma, preferentemente, se encuentra entre 650 y 750°C. En tanto el contenido de oxígenos sea > 1% y el tiempo de tratamiento sea > 1 s, su influencia en el grosor de la capa de óxido formada es reducida, de modo que puede no tenerse en cuenta. En el caso de contenidos de oxígeno en el rango de 2 a 5 %, puede partirse de un proceso no sensible.Tests have shown that the strip temperature is the decisive parameter for conducting the process, in order to regulate a desired oxide layer. It is preferably between 650 and 750°C. As long as the oxygen content is > 1% and the treatment time is > 1 s, its influence on the thickness of the oxide layer formed is small, so it can be ignored. In the case of oxygen contents in the range from 2 to 5%, an insensitive process can be assumed.
Por consiguiente, el objeto de la presente invención consiste en proporcionar un procedimiento mejorado para la preoxidación de acero en banda de alta resistencia en una cámara de reacción, dentro de un espacio de un horno, durante el recocido de recristalización posible, antes de un revestimiento por inmersión en baño fundido.Therefore, the object of the present invention is to provide an improved process for the pre-oxidation of high-strength strip steel in a reaction chamber, within a furnace space, during possible recrystallization annealing, prior to coating. by immersion in a molten bath.
Según lo descrito en la invención, dicho objeto se soluciona mediante las características indicadas en la reivindicación 1, en particular de manera que la cámara de reacción, en una entrada de la banda y en una salida de la banda, está estanqueizada contra el intercambio de gas entre el espacio del horno y la cámara de reacción, y se introduce un gas que forma una atmósfera oxidante en la cámara de reacción, y el gas circula de forma permanente dentro de la cámara de reacción, en un circuito cerrado, y se regula su composición y se compensan pérdidas debido a fugas y consumo, donde mediante al menos un sistema de boquillas asociado a la cámara de reacción y, de modo uniforme, se controla el gas, con una densidad de energía cinética elevada, mediante la ayuda de nitrógeno como gas portador, se suministra a la superficie del acero en banda para evitar efectos de capa límite laminares en la superficie de la banda, y un conducto se asocia a la cámara de reacción, para compensar variaciones del volumen, el conducto preferentemente se regula de manera que la presión interna de la cámara de reacción corresponde a la presión de la atmósfera del horno circundante, y así se mantiene mínimo el intercambio de gas mediante faltas de estanqueidad inevitables.As described in the invention, said object is solved by the characteristics indicated in claim 1, in particular in that the reaction chamber, at a band inlet and at a band outlet, is sealed against the exchange of gas between the furnace space and the reaction chamber, and a gas forming an oxidizing atmosphere is introduced into the reaction chamber, and the gas circulates permanently inside the reaction chamber, in a closed circuit, and is regulated its composition and losses due to leaks and consumption are compensated, where by means of at least one nozzle system associated with the reaction chamber and, in a uniform way, the gas is controlled, with a high kinetic energy density, through the help of nitrogen as a carrier gas, it is supplied to the surface of the strip steel to avoid laminar boundary layer effects at the strip surface, and a conduit is associated with the reaction chamber, to compensate for volume variations, the conduit is preferably regulated accordingly. so that the internal pressure of the reaction chamber corresponds to the pressure of the surrounding furnace atmosphere, and thus gas exchange is kept to a minimum through unavoidable leaks.
De ese modo es posible producir una capa de óxido, conformada de modo especialmente uniforme, sobre la superficie de la banda, de manera que se eviten puntos defectuosos en el revestimiento por inmersión en baño fundido consecutivo, mejorando así la calidad del producto final y reduciendo los productos de rechazo.In this way it is possible to produce a particularly uniformly shaped oxide layer on the strip surface, so that defect spots are avoided in the consecutive molten bath dip coating, thus improving the quality of the final product and reducing reject products.
La cámara de reacción fundamentalmente está estanqueizada hacia el espacio del horno y en particular en la entrada para bandas y en la salida para bandas, contra un intercambio de gas.The reaction chamber is essentially sealed towards the furnace space and in particular at the strip inlet and strip outlet, against gas exchange.
La atmósfera circula de forma permanente. Para ello, el gas se succiona desde la cámara de reacción, se enfría, se conduce a un ventilador, se enriquece con aire limpio y se suministra nuevamente a la cámara. Con ello se alcanza una buena homogeneidad de la atmósfera.The atmosphere circulates permanently. For this, the gas is sucked out of the reaction chamber, cooled, led into a fan, enriched with clean air and supplied to the chamber again. This achieves a good homogeneity of the atmosphere.
Otro efecto deseado reside en que mediante sistemas de boquillas (al menos un sistema de boquillas), de modo uniforme, se controla el gas con una densidad de energía cinética elevada, mediante la ayuda de nitrógeno como gas portador, y se suministra a la superficie de la banda. Esto es necesario para evitar efectos de capa límite laminares.Another desired effect is that gas with a high kinetic energy density is uniformly controlled by means of nozzle systems (at least one nozzle system) with the help of nitrogen as carrier gas and is supplied to the surface. from the band. This is necessary to avoid laminar boundary layer effects.
Para alcanzar un tampón suficiente contra la penetración del hidrógeno, el contenido de oxígeno de la atmósfera en la cámara de reacción es de 1,5 a como máximo 5 % vol.In order to achieve a sufficient buffer against the penetration of hydrogen, the oxygen content of the atmosphere in the reaction chamber is 1.5 to maximum 5% vol.
Para compensar las variaciones del volumen, la cámara de reacción posee un conducto. Preferentemente, ese conducto se regula de manera que la presión interna de la cámara de reacción corresponde a la presión de la atmósfera del horno circundante, de manera que sea mínimo el intercambio de gas mediante las faltas de estanqueidad inevitables.To compensate for volume variations, the reaction chamber has a conduit. Preferably, this conduit is regulated in such a way that the internal pressure of the reaction chamber corresponds to the pressure of the surrounding furnace atmosphere, so that gas exchange through unavoidable leaks is minimized.
Mediante esas medidas se alcanza un proceso de oxidación que puede dominarse de forma conveniente y se impide que resulte perjudicada la atmósfera del horno que rodea la cámara de reacción.By means of these measures, an oxidation process is achieved which can be conveniently controlled and the furnace atmosphere surrounding the reaction chamber is prevented from being damaged.
El acero sensible a la oxidación puede contener al menos una selección de los siguientes componentes de aleación: Mn > 0,5%, Al > 0,2%, Si > 0,1%, Cr > 0,3%. The oxidation sensitive steel may contain at least a selection of the following alloy components: Mn > 0.5%, Al > 0.2%, Si > 0.1%, Cr > 0.3%.
Claims (1)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017220583 | 2017-11-17 | ||
| DE102018107435.2A DE102018107435A1 (en) | 2017-11-17 | 2018-03-28 | Process for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace chamber |
| PCT/EP2018/080242 WO2019096616A1 (en) | 2017-11-17 | 2018-11-06 | Method for the preoxidation of strip steel in a reaction chamber arranged in a furnace chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2942672T3 true ES2942672T3 (en) | 2023-06-05 |
Family
ID=66336350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES18807218T Active ES2942672T3 (en) | 2017-11-17 | 2018-11-06 | Procedure for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace space |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3710605B1 (en) |
| KR (1) | KR102445685B1 (en) |
| CN (1) | CN111356775B (en) |
| DE (1) | DE102018107435A1 (en) |
| ES (1) | ES2942672T3 (en) |
| FI (1) | FI3710605T3 (en) |
| PL (1) | PL3710605T3 (en) |
| WO (1) | WO2019096616A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3816319B1 (en) * | 2019-10-29 | 2022-09-14 | Salzgitter Flachstahl GmbH | Method for producing a high strength steel strip with improved adhesion of zinc-based hot dip coatings |
| CN114855108A (en) * | 2022-05-24 | 2022-08-05 | 山东钢铁集团日照有限公司 | Control method for surface plating leakage and zinc ash defects of high-aluminum-silicon-manganese galvanized dual-phase steel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004059566B3 (en) | 2004-12-09 | 2006-08-03 | Thyssenkrupp Steel Ag | Process for hot dip coating a strip of high strength steel |
| ES2425916T3 (en) * | 2010-11-30 | 2013-10-18 | Tata Steel Uk Limited | Method for galvanizing a steel strip in a hot-dip galvanizing line for continuous tempering |
| DE102011050243A1 (en) * | 2011-05-10 | 2012-11-15 | Thyssenkrupp Steel Europe Ag | Apparatus and method for the continuous treatment of a flat steel product |
| DE102011051731B4 (en) * | 2011-07-11 | 2013-01-24 | Thyssenkrupp Steel Europe Ag | Process for the preparation of a flat steel product provided by hot dip coating with a metallic protective layer |
| EP3170913A1 (en) * | 2015-11-20 | 2017-05-24 | Cockerill Maintenance & Ingenierie S.A. | Method and device for reaction control |
| CN107532270B (en) * | 2015-04-22 | 2019-08-20 | 考克利尔维修工程 | Method and device for reaction controlling |
| EA032952B1 (en) * | 2015-05-07 | 2019-08-30 | Кокрий Ментенанс Эт Энженьери С.А. | Method and device for reaction control |
-
2018
- 2018-03-28 DE DE102018107435.2A patent/DE102018107435A1/en not_active Withdrawn
- 2018-11-06 PL PL18807218.5T patent/PL3710605T3/en unknown
- 2018-11-06 CN CN201880074366.XA patent/CN111356775B/en active Active
- 2018-11-06 KR KR1020207017134A patent/KR102445685B1/en active IP Right Grant
- 2018-11-06 WO PCT/EP2018/080242 patent/WO2019096616A1/en unknown
- 2018-11-06 EP EP18807218.5A patent/EP3710605B1/en active Active
- 2018-11-06 FI FIEP18807218.5T patent/FI3710605T3/en active
- 2018-11-06 ES ES18807218T patent/ES2942672T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018107435A1 (en) | 2019-05-23 |
| FI3710605T3 (en) | 2023-04-12 |
| EP3710605A1 (en) | 2020-09-23 |
| WO2019096616A1 (en) | 2019-05-23 |
| KR20200087817A (en) | 2020-07-21 |
| CN111356775B (en) | 2022-04-26 |
| PL3710605T3 (en) | 2023-03-20 |
| KR102445685B1 (en) | 2022-09-21 |
| EP3710605B1 (en) | 2023-01-25 |
| CN111356775A (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2394326T3 (en) | Procedure for coating by immersion in a molten bath of a steel strip of superior strength | |
| ES2942672T3 (en) | Procedure for the pre-oxidation of strip steel in a reaction chamber arranged in a furnace space | |
| ES2331634T3 (en) | PROCEDURE FOR RECOGNIZING AND PREPARING IN CONTINUATION OF A HIGH-STRENGTH STEEL BAND WITH VIEWS TO THEIR TEMPORARY GALVANIZATION. | |
| ES2393093T3 (en) | Procedure for manufacturing a hardened steel hardened component | |
| ES2339804T3 (en) | PROCEDURE FOR THE COATING BY IMMERSION IN THE FOUNDED BATH OF A FLAT PRODUCT MADE OF STEEL OF GREAT RESISTANCE. | |
| RU2387734C2 (en) | Method of continuous annealing and application of coating by means of hot dipping method, and system for continuous annealing and application of coating by means of hot dipping method of silica-bearing steel plate | |
| ES2365579T3 (en) | STEEL WITH GALVANIZED OR RECOGNIZED SILICON AFTER GALVANIZATION. | |
| KR101915446B1 (en) | A method for producing a black plated steel sheet, a device for producing a black plated steel sheet and a system for producing a black plated steel sheet | |
| RU2009130374A (en) | METHOD FOR PRODUCING HIGH-STRENGTH COLD-ROLLED STEEL SHEET WITH EXCELLENT CHEMICAL CONVERSION CAPABILITY, AND PRODUCTION EQUIPMENT FOR ITS MANUFACTURE | |
| TWI458832B (en) | Production method of hot- rolled steel sheet and production method of hot dip galvanized steel sheet | |
| JP2009531538A5 (en) | ||
| JP2016041851A (en) | High strength hot-dip galvanized steel sheet excellent in plated surface quality and plating adhesion, and method for manufacturing the same | |
| AU2015349052B2 (en) | Method for producing a nitrided packaging steel | |
| RU2006108544A (en) | METHOD OF PRODUCTION AND COMPLEX FOR THE PRODUCTION OF HIGH-STRENGTH GALVANIZED AND ANNEALED SHEET STEEL | |
| CA2755389A1 (en) | High-strength hot-dip galvanized steel sheet and method for producing same | |
| ES2365951T3 (en) | PROCEDURE FOR THE COATING OF A METAL BAND AND INSTALLATION OF THE PROCEDURE. | |
| JP2018516312A (en) | Method and apparatus for reaction control | |
| KR101482335B1 (en) | Ultra-high strenth galvinized steel sheet having galvanizing property and adhesion and method for manufacturing the same | |
| KR20230043138A (en) | Hot-dip galvanized steel sheet manufacturing method, steel sheet and automotive parts | |
| US20230193442A1 (en) | Method for the preoxidation of strip steel in a reaction chamber arranged in a furnace chamber | |
| JPS6144168A (en) | Production of metal hot dipped steel sheet having less non-plated part and excellent plating adhesiveness | |
| ES2805780T3 (en) | Treatment procedure of a rolling ferrous alloy sheet and treatment line for its implementation | |
| KR102109238B1 (en) | Continuous annealing apparatus for reducing surface oxide of high strength steel | |
| JP5990892B2 (en) | Method for producing high-Si cold-rolled steel sheet with excellent chemical conversion properties | |
| KR20150075323A (en) | Galvanized steel sheet having excellent adhesion property and method for manufacturing the same |