EP4689217A1 - Verfahren zum herstellen oder instandsetzen, arbeitswalze, walzgerüst, metallisches band sowie auftragsvorrichtung zum auftragen von partikeln - Google Patents
Verfahren zum herstellen oder instandsetzen, arbeitswalze, walzgerüst, metallisches band sowie auftragsvorrichtung zum auftragen von partikelnInfo
- Publication number
- EP4689217A1 EP4689217A1 EP24728174.4A EP24728174A EP4689217A1 EP 4689217 A1 EP4689217 A1 EP 4689217A1 EP 24728174 A EP24728174 A EP 24728174A EP 4689217 A1 EP4689217 A1 EP 4689217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- particles
- equal
- application device
- base body
- protection layer
- 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
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/082—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
- B05B7/201—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle
- B05B7/205—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
Definitions
- the invention relates to a method for producing or repairing a work roll having a base body and a wear protection layer, in which a coating material comprising particles is thermally applied to the base body.
- the invention further relates to a work roll having a base body and a wear protection layer for rolling a metallic product.
- the invention also relates to a rolling stand for processing a metallic product, such as a metallic strip.
- the invention further relates to a coating device for applying particles to a base body of a work roll, comprising a burner device and a control and/or regulating device for controlling and/or regulating the application device.
- a coating device for applying particles to a base body of a work roll comprising a burner device and a control and/or regulating device for controlling and/or regulating the application device.
- the object of the invention is achieved according to a first aspect by a method for producing or repairing a work roll having a base body and a wear protection layer, in which a coating material comprising particles is thermally applied to the work roll, the method being characterized in that during the thermal application of the particles 50% or more of the particles remain adhering to the base body and/or to an already applied wear protection layer, preferably 60% or more, or 75% or more, particularly preferably 80% or more. Because the present method succeeds in ensuring that at least about 50% of the particles adhere to the base body or the wear protection layer thereof and are not lost, the present method for producing or repairing a work roll or a wear protection layer for this can be carried out particularly efficiently, in particular in a particularly resource-saving manner.
- the previous disadvantages of the prior art can be significantly reduced or even completely avoided with the present invention.
- the application efficiency can also be determined by the choice of the application device or its process burner.
- the present manufacturing or repair process is a thermal application process, more precisely a thermal spraying process for thermally spraying particles onto a base body and/or a wear protection layer already present on a work roll for rolling a metallic product, such as a metallic strip.
- the particles or a particle mixture can provide the starting material for producing the wear protection layer in powder form.
- the particles or the particle mixture can be prepared as a powder and accordingly provided or processed in powder form on the application device.
- particles can also be provided in a suspension as a starting material for producing the wear protection layer.
- a suspension comprises particles which are dispersed in a liquid phase.
- the liquid phase can comprise water and/or ethanol and/or isopropanol and/or the like.
- liquid phases with a low evaporation enthalpy can be used, in particular with an evaporation enthalpy of less than or equal to 2.5 kJ/g.
- the suspension can comprise a dispersant, in particular citric acid, HNO 3 , diammonium citrate, C 5 H 8 O 2 or the like.
- a dispersant in particular citric acid, HNO 3 , diammonium citrate, C 5 H 8 O 2 or the like.
- Page 5/65 P80845DE The suspension is partially evaporated under the influence of the thermal energy of a hot gas stream generated by the burner device, whereby the suspension is usually partially evaporated before the suspension comes into contact with the base body and/or the wear protection layer, i.e. in particular before the thermal application of the particles obtained in this way, whereby the particles do not evaporate, but rather the liquid phase and/or the dispersant.
- particles or the particle mixture can also be provided as a suspension on the burner device within the scope of this description.
- particles can also be provided in wire form and/or rod form as starting material for the production of the wear protection layer.
- Corresponding wires (cored wires) or rods (cored rods) for providing the particles can have a jacket and particles enclosed by the jacket.
- the hard phase can also be provided as a wire and/or as a rod on the burner device.
- Suitable particles can be designed as a hard phase or hard phase particles and/or as a matrix or matrix particles.
- the term "hard phase" in the sense of the invention describes harder particles which are embedded in the softer matrix on the wear protection layer, the softer matrix being created using matrix particles during thermal spraying.
- Hard phases suitable for the wear protection layer can in particular be oxidic, carbide or boride hard phases, which advantageously have a high hardness.
- a compound of silicon and carbon can be used, which forms silicon carbide (SiC).
- the term "matrix" accordingly describes a structure on the wear protection layer that carries the hard phase. In this respect, the hard phase is therefore embedded in the matrix.
- Both the hard phase and the matrix can be provided by corresponding particles in the powdered starting material.
- the hard phase particles particularly preferably have a proportion of tungsten carbide (WC) of greater than or equal to 50% by weight, preferably a proportion of greater than or equal to 60% by weight and particularly preferably greater than or equal to 70% by weight.
- WC tungsten carbide
- tungsten carbide is explicitly understood to mean mono-tungsten carbide (WC).
- Page 7/65 P80845DE By means of a weight proportion of tungsten carbide in the wear protection layer, in particular as a component of a hard phase of the wear protection layer, the hardness of the wear protection layer can advantageously be increased, with an increased proportion of mono-tungsten carbide (WC) in the wear protection layer allowing the hardness of the wear protection layer to increase further.
- the wear protection layer can advantageously have a proportion of tungsten carbide (WC) of greater than or equal to 2 wt. %, preferably a proportion of greater than or equal to 20 wt. %, and particularly preferably of greater than or equal to 25 wt.
- the wear protection layer can have a proportion of tungsten carbide (WC) of greater than or equal to 40 wt. %, preferably a proportion of greater than or equal to 45 wt. %, and particularly preferably of greater than or equal to 65 wt. % or greater than or equal to 70 wt.
- the wear protection layer can have a proportion of tungsten carbide (WC) of greater than or equal to 75 wt. %, preferably a proportion of greater than or equal to 80 wt. %, and particularly preferably of greater than or equal to 85 wt. % or greater than or equal to 87 wt. %.
- the wear protection layer comprises at least one, two, three, four, five, six, seven or more of the elements tungsten carbide (WC), aluminum oxide (Al 2 O 3 ), zirconium oxide (ZrO 2 ), chromium carbide (Cr 3 C 2 , Cr 7 C 3 and/or Cr 23 C 6 ), vanadium carbide (VC), silicon carbide (SiC), tungsten boride (WB), chromium oxide (CrO, Cr 2 O 3 , CrO 2 and/or CrO 3 ), titanium carbide (TiC), titanium oxide (TiO, Ti 2 O 3 and/or TiO 2 ) or molybdenum carbide (Mo 2 C and/or MoC), in particular at least one, two, three, four or more of the elements tungsten carbide (WC), aluminum oxide (Al 2 O 3 ), zirconium oxide (ZrO 2 ), chromium carbide (Cr 3 C 2 , Cr 7 C 3 and/or Cr 23 C
- the matrix particles contain iron and/or nickel and/or cobalt and/or molybdenum and/or boron and/or tungsten, the composition of the matrix particles also essentially corresponding to the composition of the matrix of a wear protection layer produced with the matrix particles.
- iron as a component of the matrix of the wear protection layer produced using the matrix particles, a comparatively cost-effective matrix of the wear protection layer can advantageously be achieved. This can be particularly advantageous if a work roll wears out its wear protection layer faster than it corrodes.
- nickel as a component of the matrix particles and thus also of the matrix of the wear protection layer can improve the chemical resistance of the matrix of the wear protection layer.
- a matrix containing nickel can ensure that the wear protection layer is chemically resistant overall, in particular corrosion-resistant.
- Cobalt as a component of the matrix particles and thus also of the matrix of the wear protection layer can lead to an increase in the temperature resistance of the wear protection layer.
- Cobalt can also advantageously be used to increase the hardness of the matrix and thus also of the entire wear protection layer.
- Molybdenum as a component of the matrix particles and thus also of the matrix of the wear protection layer can improve the chemical resistance and/or the temperature resistance of the wear protection layer, especially the matrix.
- Page 9/65 P80845DE It can also be advantageous for the temperature resistance of the matrix and thus also of the entire wear protection layer if the matrix contains tungsten, so that tungsten is advantageous as a component of the matrix particles. It has been shown that the adhesive properties of the matrix and thus also of the wear protection layer as such can be improved by boron as a matrix component, so that boron is advantageous as a component of the matrix particles. Furthermore, the matrix particles and thus also the matrix of the wear protection layer can also contain manganese, copper, chromium and/or silicon, whereby the matrix of the wear protection layer can be further optimized in terms of its ductility, hardness, chemical resistance, machinability, friction properties, temperature resistance, adhesive resistance and/or the like.
- a suitable adhesion of particles to the work roll in the sense of the invention can be achieved simply by having a particle mixture comprising hard phase particles and matrix particles have a residual moisture content of less than or equal to 10%, preferably less than or equal to 5%, particularly preferably less than or equal to 2%.
- Page 10/65 P80845DE The term "residual moisture" in the sense of the invention is to be understood as the amount of moisture, in particular water, which is bound in the particle mixture present.
- the residual moisture is measured before the particles or particle mixture are added to a hot gas stream of an application device. If the residual moisture is in a range above the values mentioned above, it is advantageous if the residual moisture is reduced to a value of less than or equal to 10%, preferably less than or equal to 5% and particularly preferably less than or equal to 2%, before the particles are added to the hot gas stream. In this respect, it is advantageous if the present method, in particular other method parameters, are manipulated depending on the residual moisture of the particle mixture. For example, an outlet temperature of a hot gas stream which exits together with the particles from an outlet nozzle of an application device can be manipulated depending on the residual moisture, to give just one example here.
- a lower residual moisture can lead to a more homogeneous particle mixture, particularly with regard to the distribution of the moisture in the particle mixture, whereby an improvement in the adhesion of the particles to the base body and/or the wear protection layer can be achieved.
- an advantageous increase in efficiency with regard to the present method can be ensured by means of the residual moisture.
- Page 11/65 P80845DE An advantageous adhesion of particles to the work roll in the sense of the invention can also be achieved or cumulatively improved if the particles have a particle size of greater than or equal to 0.5 ⁇ m, preferably greater than or equal to 1 ⁇ m, and/or a particle size of less than or equal to 60 ⁇ m, preferably less than or equal to 30 ⁇ m and particularly preferably less than or equal to 15 ⁇ m.
- particle size in the sense of the invention refers to the average powder diameter of a powder consisting of particles, which provides the starting material for the wear protection layer.
- smaller particle sizes can be used to manipulate the level of exit temperatures at an exit nozzle of an application device.
- the application efficiency can also be influenced by this, as it has been found that smaller particles improve the average adhesion or adhesion capacity of the particles to the application roller (with constant heat transfer).
- the degree to which particles adhere to the working roller can be influenced simply by selecting the particle size.
- the powder size can ensure an advantageous increase in efficiency with regard to the present process.
- Page 12/65 P80845EN Further advantageous interactions that are certain to result from the particle size can be found in the following table.
- Particle size of the powdered particle mixture ( ⁇ m): Roughness of the wear protection layer, roughness of a product (strip) processed with the work roll, residual stresses in the wear protection layer and/or the base body, porosity, hardness, number of peaks, homogeneity, in particular homogeneity of the distribution of the coating elements within the wear protection layer as well as homogeneity of the thickness of the wear protection layer, (coating) element distribution, adhesive tensile strength, delamination resistance and scatter width (evaluation between 0 and 10 with the individual Page 13/65 P80845DE Scales between smallest possible (0) and largest possible (10) (scale designation: kg) as well as neutral (0) and best possible (10) (scale designation: nb).)
- the particles are pre-sieved to a particle size of less than or equal to 60 ⁇ m, preferably less than or equal to 30 ⁇ m, and particularly preferably less than
- the scattering width of the powdered particle mixture can also be advantageously influenced, in particular reduced.
- the scattering width with which the particles hit the work roller can be reduced as the particle size increases. It has been shown that with a smaller particle size, a higher (compressive) residual stress level can be achieved in the wear protection layer, which can at least indirectly lead to an advantageous effect with regard to the adhesive tensile strength and/or the delamination resistance of the wear protection layer. Furthermore, or depending on the above aspect, a smaller particle size can contribute to a lower porosity of the wear protection layer, whereby the delamination resistance of the wear protection layer can be improved again.
- pre-sieving can also achieve a higher level of homogeneity in terms of the powdered particle mixture, which in turn can achieve a correspondingly good level of homogeneity in the wear protection layer. Overall, pre-sieving can ensure a more stable application process. So that, for example, suitable starting materials for producing different wear protection layers for different work rolls can be provided on the application device, it is advantageous if the particles are pre-sieved on an application device, in particular before being added to a hot gas stream of the application device.
- parameters of a particle mixture can be set more precisely using the present method.
- the ability of particles to adhere to the working roll in the sense of the invention can also be positively influenced if the particles at or behind an outlet nozzle of an application device have an exit speed of greater than or equal to 500 m/s, preferably greater than or equal to 800 m/s, particularly preferably greater than or equal to 900 m/s, and/or an exit speed of less than or equal to 1500 m/s, preferably less than or equal to 1200 m/s and particularly preferably less than or equal to 1000 m/s.
- the exit speed is selected to be lower, particles are less likely to bond with each other, with the base body and/or with the wear protection layer already present on the base body when they impact the working roll.
- Page 15/65 P80845DE which can, among other things, increase the porosity and/or permeability of the wear protection layer.
- the exit speed is selected to be higher, the level of residual compressive stresses resulting in the wear protection layer can be increased, which can advantageously increase the adhesive tensile strength of the wear protection layer, but the risk of particles bouncing off into the environment when they hit the work roller and being lost in the process also increases, which can reduce the application efficiency.
- a higher exit speed can lead to an improved application efficiency of particles to the application roller, because higher kinetic energy generally leads to better adhesion of the particles.
- the exit speed also affects the temperature of the particles, for example, since a higher exit speed reduces the contact time with the burner flame, which in turn can reduce the particle temperature at the time of impact on the work roll.
- the exit speed is measured at a point or in an area that is 100 mm or less away from the exit nozzle, preferably 50 mm or less and particularly preferably 10 mm or less, the exit speed can be measured particularly reliably and reproducibly.
- Page 16/65 P80845DE the risk of the measurement being critically influenced by environmental influences can be reduced, because falsified measurement values can have a negative impact on the adhesion conditions of particles to the work roll.
- the adhesion capacity can also be conveniently manipulated if the exit speed of the hot gas flow is set depending on the properties of the particles.
- adhesion of particles to the work roll in the sense of the invention can also be achieved or cumulatively improved simply by a favorably selected exit speed, as proposed here.
- the ability of particles to adhere to the work roll can also be adjusted if the particles are discharged from an outlet nozzle of an application device by means of a hot gas stream, the particles and/or the hot gas stream having an outlet temperature of greater than or equal to 800 °C, preferably greater than or equal to 1000 °C and particularly preferably greater than or equal to 1200 °C, and/or the particles and/or the hot gas stream having an outlet temperature of less than or equal to 2200 °C, preferably less than or equal to 2000 °C and particularly preferably less than or equal to 1800 °C.
- the particles are heated in the hot gas stream and are thereby also melted or liquefied, the degree of such melt liquefaction being dependent in particular on their particle size.
- Page 17/65 P80845DE Overall, the adhesion capacity of the particles can also be adjusted in this way.
- the layer quality of the wear protection layer can also be influenced in this way.
- the outlet temperature can be adjusted depending on the residual moisture and/or the particle size. In this respect, it is advantageous if the outlet temperature is adjusted depending on the properties of the particles. It can be advantageous to select a higher outlet temperature if the residual moisture is higher. If the particle size is selected to be smaller, for example, the outlet temperature can also be set lower.
- Particularly meaningful values can be measured with regard to the outlet temperature if the outlet temperature is measured at a point or in an area that is 100 mm or less away from the outlet nozzle, preferably 50 mm or less and particularly preferably 10 mm or less. Tests have shown that the exit temperature of the particles and/or the hot gas flow can advantageously be measured at a distance of between 5 mm and 15 mm behind the exit nozzle.
- Another very advantageous process variant can be provided if, during the application of particles to the work roll, an overspray surrounding the work roll containing at least particles that do not adhere to the base body, Page 18/65 P80845DE Process gases, combustion products or the like are extracted from the surroundings of the work roll at an extraction speed of greater than or equal to 10 m/s, preferably greater than or equal to 15 m/s and particularly preferably greater than or equal to 18 m/s, and/or at an extraction speed of less than or equal to 30 m/s, preferably less than or equal to 25 m/s and particularly preferably less than or equal to 20 m/s.
- An undesirable loss of particles can also be avoided by means of such extraction.
- the amount of overspray critically surrounding the work roll can be advantageously reduced if relevant disruptive elements are removed from the immediate surroundings of the work roll, in particular after contact with the work roll.
- disruptive elements can include, for example, excess particles, process gases, combustion products or the like, and can lead to quality problems in the wear protection layer due to corresponding contamination or defects if they cannot be adequately removed.
- a suction speed selected within the framework of the suggested values it can be avoided that particles in particular which have not yet had contact with the work roll are adversely diverted from their intended trajectory and thus miss their target on the work roll or only hit the work roll in an unfavorable manner.
- an improved adhesion of particles to the work roll in the sense of the invention can also be achieved by this alone.
- Page 19/65 P80845DE can be achieved or cumulatively improved.
- this can also result in an improved layer quality of the wear protection layer.
- at least one suction opening of a suction device is arranged at a distance of greater than or equal to 0.1 m from the work roll, preferably greater than or equal to 0.2 m, and/or at a distance of less than or equal to 1.5 m, preferably less than or equal to 1 m and preferably less than or equal to 0.5 m.
- the distances proposed here allow overspray to be reliably removed from the work roll or from its surroundings.
- the at least one suction opening is preferably arranged on a side of the work roll facing away from the discharge nozzle, so that particles which flow past the work roll or bounce off it can be extracted directly from the surroundings of the work roll. Cumulatively or alternatively, other or additional positions for arranging the at least one suction opening or several suction openings can also be provided. It is expedient if the distance between the work roll and the suction opening is set depending on the suction speed. This can avoid or at least significantly reduce the risk of negatively affecting air movements or air turbulence in the immediate vicinity of the work roll.
- the suction speed or the suction distance can also cause additional cooling effects in relation to the work roll, for example through an air flow generated by the suction, which can flow along the surface of the work roll, in particular its base body or wear protection layer.
- suction openings and their distance from the work roll can also be positioned depending on the existing suction power in order to be able to additionally manipulate the temperature during the thermal application of particles.
- the adhesion capacity of particles can be positively influenced if the suction speed and/or the distance between the base body and the suction opening are set depending on the exit speed of the particles at or behind an exit nozzle of an application device. This can also influence the coating temperature.
- a hard phase proportion of greater than or equal to 50% is set, preferably greater than or equal to 55% and particularly Page 21/65 P80845DE preferably greater than or equal to 60%, and/or a hard phase proportion of less than or equal to 90%, preferably less than or equal to 85% and particularly preferably less than or equal to 80%.
- Ratio of hard phase proportion in the particle mixture i.e. also the ratio of hard phase to the total layer system consisting of hard phase and matrix: hardness, roughness R a , density, homogeneity of element distribution, homogeneity of layer thickness distribution, number of peaks, adhesive strength, residual stresses and porosity of the wear protection layer (evaluation between 0 and 10 with the individual scales Page 22/65 P80845DE between smallest possible (0) and largest possible (10) (scale designation: kg) as well as neutral (0) and best possible (10) (scale designation: nb).)
- the hardness of the wear protection layer can be advantageously influenced by such a hard phase proportion.
- the hard phase proportion in the particle mixture has a total value as mentioned above. Further advantageous interactions in this regard can be found in the table below.
- a further favorable adhesion of particles to the work roll in the sense of the invention can be achieved or cumulatively improved if the base body is preheated to a base body temperature of greater than or equal to 30 °C, preferably greater than or equal to 50 °C and particularly preferably greater than or equal to 60 °C, and/or to a base body temperature of less than or equal to 120 °C, preferably less than or equal to 150 °C and particularly preferably less than or equal to 200 °C, before the particles are applied.
- the wear protection layer applied using the method described here is already ready for use on the work roll, and the wear protection layer can also be further processed if required after the actual application, for example using abrasive and/or subtractive manufacturing processes.
- the adhesion capacity of particles can generally be improved in the sense of the invention, at least in some areas, if the base body or a wear protection layer already arranged on it is processed abrasively and/or subtractively before and/or during the application of the particles to the work roll. In particular, this also makes it possible to easily recondition or repair work rolls that have already been used. It is particularly advantageous with regard to repairs if a wear protection layer is removed at least partially and/or in certain areas before and/or during the application of the particles to the work roll.
- the proposed measurement can be carried out at different times in connection with the proposed method, in particular before, during and/or after a base body is provided on the application device. It is also advantageous if at least one coating parameter is determined automatically depending on the actual values determined. In particular, the coating parameters already explained above can be determined at least partially automatically in accordance with the invention. This can in particular achieve advantageous adhesion of particles to the work roller in accordance with the invention. In connection with the proposed method, coating parameters can be determined at different times, in particular before, during and/or after the application of particles to a base body on the application device.
- adhesion of particles to the work roll can be advantageously influenced in the sense of the invention if the base body is automatically preheated depending on the determined actual values, in particular to one of the base body temperatures described above.
- Page 26/65 P80845DE The degree of automation can be advantageously further developed if the wear protection layer applied to the base body is automatically checked, in particular visually checked. This makes it easier, faster and more reliable to check the quality of manufactured work rolls. Data determined for a manufactured work roll can be reliably assigned to the work roll if the manufactured work roll is automatically marked and registered, for example by means of a barcode, an RFID chip or the like. If a reference sample is generated automatically, the quality assurance of the present process can be further improved.
- a new wear protection layer applied to the base body is processed using a subtractive process, in particular reworked, in particular abrasive and/or by means of selective laser melting.
- the tips of an applied wear protection layer are broken at their tips by an abrasive process, in particular by grinding, and/or the tips of the tips of the wear protection layer are rounded off by means of selective laser melting.
- the object of the invention is achieved by a work roll having a base body and a wear protection layer for rolling a metallic product, in particular for rolling a metallic strip, wherein the work roll is manufactured using a method according to one of the features described here.
- a metallic product can be mechanically treated to a higher quality, in particular its surface.
- the work roll manufactured or repaired using the present method generally also has a longer service life.
- the object of the invention is also achieved by a rolling stand for processing a metallic product, such as a metallic strip, having a work roll according to one of the features described here. Because the rolling stand is equipped with the present work roll, set-up work can be further reduced or set-up intervals can be further extended. Page 28/65 P80845DE This is particularly due to the fact that the work roll has an increased service life and can therefore be used on the rolling stand for a longer period of time.
- the object of the invention is also achieved by a metallic strip, wherein the metallic strip is rolled with the present work roll, in particular cold rolled.
- certain features of the wear protection layer can be recognized based on the surface image achieved on the metallic strip.
- the texturing of the wear protection layer of the work roll can be transferred from the surface of the work roll, in particular the surface of the wear protection layer, to the surface of the metallic strip when a metallic strip is rolled.
- a very high-quality metallic strip can be produced.
- an application device for applying particles to a base body of a work roll in particular a thermal application device, having a burner device, in particular an HVOF burner (high-velocity oxygen fuel burner) and/or an HVAF burner (high-velocity air fuel burner) and/or the like, wherein the application device is designed so that during the thermal application of the particles to the work roll, 50% or more of the particles remain adhering to the base body and/or to an already applied wear protection layer and/or to the wear protection layer.
- Page 29/65 P80845DE With the present application device, it is possible for at least about 50% of the particles to adhere to the base body or the wear protection layer thereof and not to be lost.
- the application device works particularly efficiently both with regard to the production and the repair of a work roll or a wear protection layer for this. It is particularly advantageous if the application device is set up so that 60% or more of the particles remain adhering to the base body and/or to an already applied wear protection layer on the base body and/or the wear protection layer, preferably 75% or more and particularly preferably 80% or more. This allows the application device to be operated particularly efficiently. In particular, such an application device can significantly improve the process of applying particles to a base body to produce a wear protection layer on a work roll or to repair such a wear protection layer.
- the application device is designed so that during the thermal application of the particles to the working roller, 40% or less of the particles bounce off the base body and/or off an already applied wear protection layer, preferably 25% or less and particularly preferably 20% or less, so that the present application device can work extremely efficiently.
- a particularly resource-efficient process can be achieved in this way.
- Page 30/65 P80845DE The efficiency described here can advantageously be achieved with the present application device if the application device has a detection device for detecting residual moisture of a particle mixture comprising hard phase particles and matrix particles, wherein the detection device has one or more sensor elements.
- the particles can advantageously be examined on the application device with regard to their residual moisture by means of the detection device of the application device if at least one sensor element thereof is arranged on a provision device for providing the particle mixture.
- a provision device in this regard can advantageously be implemented if the provision device comprises a powder conveyor, a powder mixer or the like.
- the application device has a sieving device for sieving the particles with regard to their particle size, wherein the sieving device has one or more sieving elements.
- different particles can be pre-screened at the application device simultaneously or in series using several screen elements, in particular according to different particle sizes and depending on the particle material. The screen device can thus be used to provide particles pre-screened as required to the application device.
- suitable screen devices can be designed in different ways and made available on the application device.
- Page 31/65 P80845DE The sieving device can be implemented in a structurally simple and compact manner on the application device if the sieving device or a provision device for providing the particles is arranged, such as a powder conveyor, a powder mixer or the like.
- the efficiency of the present application device can also be advantageously achieved or increased by means of the sieving device described here.
- the application device can also be advantageously designed if the application device has a further detection device for detecting particle sizes, wherein the detection device has one or more sensor elements.
- the efficiency of the present application device can also be advantageously achieved or additionally increased by means of the further detection device of the application device.
- the sensor element or elements can also be implemented and placed differently on the application device.
- An advantageous embodiment provides that at least one sensor element of the further detection device is arranged on a supply device for supplying the particles, wherein the supply device can comprise a powder conveyor, a powder mixer or the like.
- the efficiency of the application device in the sense of the invention can also be achieved or increased further if the application device has a measuring device for measuring an exit speed of the particles at an exit nozzle, wherein the measuring device has one or more sensor elements.
- Page 32/65 P80845DE One or more sensor elements are expediently designed to be able to measure the exit speed at or behind the exit nozzle. For this purpose, one or more sensor elements can be arranged at or behind the exit nozzle.
- the application device has a further measuring device for measuring an exit temperature of the particles at an exit nozzle, wherein the further measuring device has one or more sensor elements.
- the exit temperature can be reliably measured if one or more sensor elements are designed to be able to measure the exit temperature at or behind the exit nozzle.
- at least one sensor element can be arranged at or behind the exit nozzle.
- the additional measuring device of the application device can be conveniently arranged on the mixing device and/or on a provision device for providing the particles, such as a powder conveyor or the like.
- Page 34/65 P80845DE It is also advantageous if the application device has an abrasive or subtractive processing device, by means of which the base body and/or the wear protection layer can be processed, in particular before and/or after application of the wear protection layer.
- the efficiency of the present application device can also be advantageously achieved or increased by equipping the application device with an abrasive and/or subtractive processing device, since this allows the base body or a wear protection layer already present on it to be better prepared for the application of particles.
- a cooling option has proven to be advantageous in this case, especially with regard to smaller work rolls, since these heat up to a critical level more quickly during a thermal spraying process than large work rolls. If a work roll can be adequately cooled, the risk of an application process having to be interrupted due to overheating of the work roll can be reduced. Overall, a more consistent process can be achieved by means of good cooling of the work roll, which in turn leads to a higher quality layer structure of the wear protection layer. In general, interruptions worsen the economic efficiency of the process in question.
- Page 37/65 P80845DE Different media can be used as cleaning agents and in particular as cooling agents. However, CO 2 has proven to be very advantageous, particularly with regard to smaller work rolls.
- the application device has a supply device for supplying particles, the supply device being designed to supply the particles with a delivery tolerance of +/- 2 g per minute in terms of a delivery quantity.
- the application device has one or more supply devices, on which different detection and/or measuring devices or the like can also be arranged.
- Page 38/65 P80845DE In order to ensure that a uniform quantity of particles can be made available for thermal application or spraying, particularly at the outlet nozzle of the application device, it is imperative that the particles are also reliably conveyed.
- a conveying tolerance of a maximum of +/- 2 g per minute has proven to be advantageous in order to be able to produce a particularly uniform wear protection layer on the work roller.
- the conveying tolerance can deviate upwards or downwards depending on the amount of particles to be effectively conveyed.
- the supply device can be designed in the form of a suitably configured powder conveyor for conveying the powdery particle mixture.
- the thermal energy generated by the application device is also used cumulatively to preheat a base body of the work roll.
- the present application device has a control and/or regulating device, wherein the control and/or regulating device is set up to automatically control or regulate one or more devices of the application device, in particular also depending on one another. Using such a control and/or regulating device, the operation of one or more devices can be controlled automatically, which can also have a further positive effect on the adhesion capacity.
- control and/or regulating device is configured so that during the thermal application of the particles to the work roll, 50% or more of the particles remain on the base body and/or on an already applied wear protection layer, adhering to the base body and/or on the wear protection layer. It is particularly advantageous if the control and/or regulating device is configured so that 60% or more of the particles remain on the base body and/or on an already applied wear protection layer, adhering to the base body and/or on the wear protection layer, preferably 75% or more and particularly preferably 80% or more.
- the application device can work particularly efficiently if the control and/or regulating device is set up so that 40% or less of the particles bounce off the base body and/or off an already applied wear protection layer during the thermal application of the particles to the work roller, preferably 25% or less and particularly preferably 20% or less.
- the control and/or regulating device for controlling and/or regulating the application device is particularly advantageous for carrying out a method according to one of the features described here.
- the method according to the invention can be carried out particularly efficiently by an application device that works in this way.
- Page 41/65 P80845DE A further advantageous increase in efficiency with regard to an improved adhesion capacity of particles to the work roll can also be achieved by choosing the dimensions (measurements) of the work roll, the mass of the work roll, the base body material and/or the manufacturing process of the base body.
- the application device preferably has a layer thickness control which is set up to measure a layer thickness of the wear protection layer, in particular a real-time layer thickness control, in particular a permanent layer thickness control. This allows the application device to be advantageously controlled and/or regulated in the sense of achieving a desired layer thickness of the wear protection layer. Further advantages, details and features of the invention can also be seen from the exemplary embodiment explained below.
- Figure 1 a schematic view of a possible process sequence for producing or repairing a work roll with regard to a large number of process options, several of which are optional; and
- Figure 2 a schematic view of an application device for applying particles to a work roll, by means of which the process or process sequence from Figure 1 can be carried out.
- Page 42/65 P80845DE According to the illustration in Figure 1, a first possible process sequence I of a method for the automated manufacture or repair of a work roll 100 (see Figure 2) for rolling a metallic product (not shown) is shown by way of example. At this point, it should be mentioned that process modifications for this are not shown or described separately again using other representations of process sequences. In this respect, individual process steps can be changed in terms of their order or combined with one another.
- the exemplary method shown in the illustration in Figure 1 begins at a starting point 1 with a first process step 1, which comprises the provision of a base body 102 of the work roll 100.
- a first process step 1 comprises the provision of a base body 102 of the work roll 100.
- This can be a newly manufactured work roll 100 with a still unused base body 102 or a work roll 100 to be repaired with a used base body 2 already provided with a used wear protection layer 104.
- the work roll 100 can be applied to the starting point 1 in an automated manner, i.e.
- an application device 110 for thermally applying or spraying particles 112 onto the surface 104 of the work roll 100.
- Page 43/65 P80845DE With the process sequence shown and explained here, 65% of the particles 112 or more sprayed in the direction of the work roller 100 will adhere to the work roller 100, which means that the process can be operated extremely efficiently.
- the base body 102 After the base body 102 has been prepared or delivered to a processing position 116 of the application device 110, the base body 102 is cleaned according to a process step 2. According to a process step 3, the base body 102 is measured in order to determine actual values of the base body 102 and any old wear protection layer 104 that may already be present on it.
- the actual values determined can be automatically compared with target values.
- processing and coating parameters can then be automatically determined depending on the actual values determined.
- the base body 102 can be preheated automatically if this should be necessary, for example to 110 °C. If it is a work roll 100 that is to be repaired, the existing old wear protection layer 104 can first be treated, in particular automatically, with abrasion, according to an intermediate method step 6A, in order to, for example, carry out a partial layer removal automatically, so that the old wear protection layer 104 is automatically evened out and automatically prepared, or if necessary, is automatically removed completely from the base body 102.
- Page 44/65 P80845DE The correspondingly processed base body 102 can then be preheated as required in accordance with process step 6.
- a process step 7 residual moisture is automatically measured and, if necessary, automatically reduced to a value of 7%.
- the particles 112 can already be automatically preheated here.
- the particles 112 are automatically pre-sieved so that different particles have a particle size between 10 ⁇ m and 25 ⁇ m.
- the particles 112 are automatically mixed to form a desired particle mixture 112A made up of hard phase particles and matrix particles in particular, with the hard phase proportion being 65%.
- the particle mixture 112A is automatically preheated to a use temperature, which can be set to approximately 60 °C, for example.
- the particles 112 are automatically thermally applied or sprayed as a particle mixture 112A onto the work roller 100 rotating in the processing position 116, for example with an adhesion capacity of over 65%.
- the exit speed of the particle mixture 112A which exits in a hot gas stream 120 from an exit nozzle 122 of the application device 110, is automatically measured and, if necessary, automatically adjusted, for example to approximately 1050 m/s.
- the exit temperature of the particle mixture 112A is automatically measured and, if necessary, automatically adjusted, for example to approximately 900 °C.
- an overspray 126 is automatically extracted from the environment 130 of the work roll 100, preferably at an extraction speed of 22 m/s.
- the work roll 100 is automatically cooled.
- the wear protection layer 104 is automatically reworked, for example using an EDT process.
- the wear protection layer 104 is automatically rechecked, for example optically.
- the work roll 100 produced is automatically marked and registered.
- a reference sample is automatically generated.
- the manufactured work roll 100 is automatically removed from the processing position and made available for further use.
- the method sequence explained by way of example, which began at starting point 1, ends with method step 21, which represents the end point 21 of the method sequence.
- Page 46/65 P80845DE Now the process sequence can begin again at the starting point 1, whereby the process sequence can be carried out in the same or modified manner.
- individual process steps can be combined in almost any way, carried out multiple times or optionally, or omitted.
- an application device 110 for applying particles 112 as a particle mixture 112A to the surface 102A of the base body 102 of the work roller 100 is shown.
- the application device 110 has a machine direction 132, in the direction of which the particle mixture 112A is applied to the work roller 100.
- the application device 110 has a processing position 116, at which the work roller 100 for the thermal application of the particles 112 is arranged with a rotation device 136 rotatably mounted about a rotation axis 136A. According to the illustration in Figure 2, a rotation direction 136B is shown.
- the application device 110 has a feed device 138 (only shown schematically) with a feed position 138A, from which the base body 102 of the designated work roller 100 is fed into the processing position 116 with a feed direction 138B.
- the application device 110 also has a removal device 140 (only shown schematically) with a removal position 140A, into which the produced work roller Page 47/65 P80845DE 100 is removed from the processing position 116 with a removal direction 140B.
- the application device 110 also comprises an abrasive and/or subtractive processing device 144 (only shown schematically), by means of which the base body 102 and/or the wear protection layer 104 can be processed as required.
- the application device 110 has a burner device 146, wherein the particles 112 are carried out of the outlet nozzle 122 of the application device 110 in the machine direction 132 by means of the hot gas flow 120.
- the burner device 146 can be designed in different ways, for example as an HVOF burner.
- the application device 110 has a provision device 150.
- the provision device 150 is positioned in an operative relationship to the burner device 146, in particular above the burner device 146, and in particular has a powder conveyor device 150A for conveying the particles 112 or the particle mixture 112A, a mixing device 150B for mixing the particles 112 or the particle mixture 112A and a sieving device 150C for sieving the particles 112 or the particle mixture 112A.
- the application device 110 has a first detection device 152, the sensor elements (not shown here) of which can detect the residual moisture with regard to the particles 112 or the powdery particle mixture 112A.
- the sensor elements are provided on the supply device 150.
- An increased residual moisture can be reduced as required by means of the heat energy generated by the burner device 146.
- functions of the application device 110 can be manipulated in accordance with the invention by means of the residual moisture values determined.
- the application device 110 has a further detection device 154, the sensor elements (not shown here) of which can detect the particle size with regard to the particles 112 or the powdery particle mixture 112A.
- functions of the application device 110 can be manipulated in the sense of the invention using determined particle size values.
- the application device 110 also has a measuring device 156 for measuring an exit speed.
- the measuring device 156 has one or more sensor elements (not shown) by means of which the exit speed in an area 158 on or behind the outlet nozzle 122 can be measured.
- functions of the application device 110 can also be manipulated in accordance with the invention by means of determined exit speed values.
- the application device 110 has a further measuring device 160 for measuring an exit temperature.
- the further measuring device 160 also has one or more sensor elements (not shown) by means of which the exit temperature in an area 158 on or behind the outlet nozzle 122 can be measured.
- functions of the application device 110 can also be manipulated in accordance with the invention by means of determined outlet temperature values.
- the application device 110 also has a suction device 162 comprising one or preferably several suction elements (not explicitly shown here) with suction openings (not explicitly shown here), by means of which an overspray 126 can be sucked out of the surroundings 130 of the work roller 100 or in particular from the processing position 116.
- the suction device 162 or suction elements thereof can be adjusted in their position relative to the work roller 100 and thus also relative to a rotation axis 136A.
- Page 50/65 P80845DE For this purpose, the application device 110 or the suction device 162 has another detection device 164, by means of which this position can be detected.
- Overspray 126 can be kept away from the work roller 100 in a particularly advantageous manner if the suction device 162 or suction elements thereof are arranged on a side 166 facing away from the outlet nozzle 122.
- functions of the application device 110 can be additionally manipulated in accordance with the invention by means of determined position values. Cumulatively, functions of the application device 110 can be expediently manipulated if the application device 110 or the mixing device 150B already described above has an additional measuring device 168 for measuring hard phase and/or matrix components.
- the additional measuring device 168 has one or more sensor elements (not explicitly shown), which are preferably arranged on the provision device 150.
- the application device 110 also has a cooling and/or cleaning device 170, by means of which the work roller 100 or the base body 102 or the wear protection layer 104 can be cooled or cleaned as required.
- the cooling and/or cleaning device 170 has nozzle elements (not shown in more detail) with nozzle openings, which can be adjusted with regard to their position relative to the work roller 100.
- Page 51/65 P80845DE The respective position can be determined using an observation device 172.
- functions of the application device 110 can be manipulated favorably in accordance with the invention using determined position values. So that the individual functions of the application device 110 can be evaluated and controlled or regulated in a better coordinated manner, the application device 110 also has a higher-level control and/or regulating device 174.
- the application device 110 shown and explained here succeeds in ensuring that 65% or more of the particles 112 sprayed in the direction of the work roller 100 adhere to the work roller 100, whereby the application device 110 and the method carried out with it can be operated extremely efficiently.
- Page 52/65 P80845DE List of reference symbols I Process sequence 1 Starting point or first process step (preparation) 2 a second process step (cleaning) 3 a third process step (measuring) 4 a fourth process step (comparing values) 5 a fifth process step (determining processing parameters) 6 a sixth process step (preheating the base body) 6A an alternative sixth process step (abrasive treatment) 7 a seventh process step (reducing residual moisture) 8 an eighth process step (preheating particles) 9 a ninth process step (pre-sieving) 10 a tenth process step (mixing) 11 an eleventh process step (preheating particle mixture) 12 a twelfth process step (thermal application) 13 a thirteenth process step (determining exit speed) 14 a fourteenth process step (determining exit temperature) 15 a fifteenth process step (extraction of overspray) 16 a sixteenth process step (cooling of working roll) 17 a seventeenth process step (post-processing) 18 an eighteenth process step (post-inspection
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- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023113187.7A DE102023113187A1 (de) | 2023-05-19 | 2023-05-19 | Verfahren zum Herstellen oder Instandsetzen, Arbeitswalze, Walzgerüst, metallisches Band sowie Auftragsvorrichtung zum Auftragen von Partikeln |
| PCT/EP2024/063709 WO2024240650A1 (de) | 2023-05-19 | 2024-05-17 | Verfahren zum herstellen oder instandsetzen, arbeitswalze, walzgerüst, metallisches band sowie auftragsvorrichtung zum auftragen von partikeln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4689217A1 true EP4689217A1 (de) | 2026-02-11 |
Family
ID=91247712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24728174.4A Pending EP4689217A1 (de) | 2023-05-19 | 2024-05-17 | Verfahren zum herstellen oder instandsetzen, arbeitswalze, walzgerüst, metallisches band sowie auftragsvorrichtung zum auftragen von partikeln |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4689217A1 (de) |
| KR (1) | KR20260000579A (de) |
| DE (1) | DE102023113187A1 (de) |
| MX (1) | MX2025013790A (de) |
| WO (1) | WO2024240650A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230042220A1 (en) * | 2020-01-20 | 2023-02-09 | Mecanizacion Industrial Astillero, S.A. | Method for obtaining rolling mill rolls with a coating of tungsten carbide alloy, and resulting roll |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61250160A (ja) * | 1985-04-26 | 1986-11-07 | Sumitomo Metal Ind Ltd | 耐摩耗部材およびその製造方法 |
| JPH0985311A (ja) * | 1995-09-20 | 1997-03-31 | Sumitomo Metal Ind Ltd | 金属圧延用ロールおよびその製造方法 |
| DE10025161A1 (de) * | 2000-05-23 | 2001-11-29 | Joma Chemicals As Limingen | Werstoff und Verfahren zum Herstellen einer korrosions-und verschleißfesten Schicht durch thermisches Spitzen |
| DE102007028823A1 (de) * | 2007-06-20 | 2008-12-24 | Siemens Ag | Verfahren zur Herstellung eines Blechs in einer Walzstraße |
| DE102008001720A1 (de) * | 2008-05-13 | 2009-11-19 | Voith Patent Gmbh | Verfahren zum Beschichten einer Werkstückoberfläche |
| CN106574356B (zh) * | 2014-09-05 | 2019-07-23 | 三菱日立电力系统株式会社 | 热喷涂用粉末的制造方法、以及热喷涂用粉末 |
| ES2715875T3 (es) * | 2015-01-20 | 2019-06-06 | Sturm Maschinen & Anlagenbau Gmbh | Instalación y procedimiento para el recubrimiento metálico de una pieza de trabajo |
| CN105543769A (zh) * | 2016-03-03 | 2016-05-04 | 中研智能装备有限公司 | 一种轧辊等离子3d快速成型再制造设备及方法 |
| DE102019004774A1 (de) * | 2019-07-08 | 2020-09-24 | Daimler Ag | Verfahren zum Beschichten einer Zylinderlauffläche |
| CN211897079U (zh) * | 2019-12-27 | 2020-11-10 | 上海英佛曼纳米科技股份有限公司 | 一种带有耐磨损抗粗糙度下降纳米涂层的冷轧活套辊 |
-
2023
- 2023-05-19 DE DE102023113187.7A patent/DE102023113187A1/de active Pending
-
2024
- 2024-05-17 WO PCT/EP2024/063709 patent/WO2024240650A1/de not_active Ceased
- 2024-05-17 KR KR1020257035820A patent/KR20260000579A/ko active Pending
- 2024-05-17 EP EP24728174.4A patent/EP4689217A1/de active Pending
-
2025
- 2025-11-18 MX MX2025013790A patent/MX2025013790A/es unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230042220A1 (en) * | 2020-01-20 | 2023-02-09 | Mecanizacion Industrial Astillero, S.A. | Method for obtaining rolling mill rolls with a coating of tungsten carbide alloy, and resulting roll |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20260000579A (ko) | 2026-01-02 |
| WO2024240650A1 (de) | 2024-11-28 |
| CN121195083A (zh) | 2025-12-23 |
| MX2025013790A (es) | 2026-01-07 |
| DE102023113187A1 (de) | 2024-11-21 |
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