DE102019217711A1 - Application of material to a foam to close a cavity - Google Patents

Application of material to a foam to close a cavity Download PDF

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Publication number
DE102019217711A1
DE102019217711A1 DE102019217711.5A DE102019217711A DE102019217711A1 DE 102019217711 A1 DE102019217711 A1 DE 102019217711A1 DE 102019217711 A DE102019217711 A DE 102019217711A DE 102019217711 A1 DE102019217711 A1 DE 102019217711A1
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Prior art keywords
foam
solder
soldering
cavity
weight
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DE102019217711.5A
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German (de)
Inventor
Bernd Burbaum
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Siemens AG
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Siemens AG
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Priority to DE102019217711.5A priority Critical patent/DE102019217711A1/en
Publication of DE102019217711A1 publication Critical patent/DE102019217711A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
    • B23P6/007—Repairing turbine components, e.g. moving or stationary blades, rotors using only additive methods, e.g. build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0018—Brazing of turbine parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/06—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for positioning the molten material, e.g. confining it to a desired area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/005—Repairing methods or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/001—Turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/20—Specially-shaped blade tips to seal space between tips and stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/234—Laser welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/237—Brazing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/238—Soldering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/30—Manufacture with deposition of material
    • F05D2230/31—Layer deposition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/514—Porosity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/612—Foam

Abstract

Durch die Verwendung von Schaum, um einen Hohlraum zu überbrücken, kann in bekannter Weise ein Reparaturverfahren verwendet werden, um Material aufzutragen.By using foam to bridge a cavity, a repair process can be used to apply material in a known manner.

Description

Die Erfindung betrifft die Anwendung von Schäumen, insbesondere von Lotschäumen und den Materialauftrag auf diesen Schaum, um einen Hohlraum für den Materialauftrag zu überbrücken.The invention relates to the use of foams, in particular solder foams, and the application of material to this foam in order to bridge a cavity for the application of material.

Die Erfindung betrifft die Reparatur von hohlen Bauteilen wie von Turbinenlaufschaufeln an der Schaufelspitze. Zur Beseitigung von Rissen in den Turbinenschaufeln müssen manchmal großflächig Bereiche teilweise auch im Kronenboden ausgemuldet werden. Für eine Reparatur mittels LMD (Laser Metal Deposition) fehlt für den Aufbau dann eine Grundlage, auf den die erneuerte Schaufelspitze (Kronenboden, Anstreifkante) wieder aufgebaut werden könnte. Zurzeit werden separat hergestellte Coupons aufgelötet.The invention relates to the repair of hollow components such as turbine blades at the blade tip. To remove cracks in the turbine blades, large areas sometimes have to be hollowed out, sometimes also in the crown base. For a repair by means of LMD (Laser Metal Deposition) there is then no basis for the structure on which the renewed blade tip (crown bottom, rubbing edge) could be built again. At the moment, separately manufactured coupons are soldered on.

Es ist daher Aufgabe der Erfindung oben genanntes Problem zu lösen.It is therefore the object of the invention to solve the above-mentioned problem.

Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1 und ein repariertes Bauteil gemäß Anspruch 3.The object is achieved by a method according to claim 1 and a repaired component according to claim 3.

In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen.The subclaims list further advantageous measures that can be combined with one another as required in order to achieve further advantages.

Vorgeschlagen wird eine Reparatur des offenen Hohlraums mittels Laser Metal Deposition von Lotschäumen zur Bildung eines Substrats und zur großflächigen Reparatur an Heißgaskomponenten.A repair of the open cavity by means of laser metal deposition of solder foams to form a substrate and for large-area repairs to hot gas components is proposed.

Der Prozess umfasst folgende Schritte:

  1. 1. Vorbereitung des hohlen Bauteils, insbesondere der Turbinenschaufeln an den Tips durch vollständiges Ausmulden von Bereichen mit Rissen.
  2. 2. LMD von Mischung aus Lotwerkstoff und einem Zusatzwerkstoff zur Bildung eines Lötschaums.
  3. 3. LMD von oxidationsbeständigem Zusatzwerkstoff für eine strukturelle Reparatur der Schaufel, Lötschaum dient als Grundwerkstoff (Substrat) für den Aufbau des Schaufeltips.
  4. 4. Hochtemperaturlöten zur Auflösung des Lötschaums und zur Versiegelung von möglichen, innen liegenden Rissen, die Schaufel wird dabei (top down - Schaufelfuß oben) im Ofen gelötet.
The process consists of the following steps:
  1. 1. Preparation of the hollow component, in particular the turbine blades on the tips, by completely hollowing out areas with cracks.
  2. 2. LMD of a mixture of solder material and a filler material to form a solder foam.
  3. 3. LMD of oxidation-resistant filler material for a structural repair of the blade, soldering foam serves as the base material (substrate) for the construction of the blade tip.
  4. 4. High temperature soldering to dissolve the soldering foam and to seal possible internal cracks, the blade is soldered in the furnace (top down - blade root up).

Vorteile:

  • • Ermöglichung einer großflächigen Reparatur an Turbinenschaufel mit artgleichen Zusatzwerkstoff;
  • • Reparaturverfahren mit minimaler Energieeinbringung in den Grundwerkstoff.
Advantages:
  • • Facilitating large-area repairs to turbine blades with filler material of the same type;
  • • Repair process with minimal energy input into the base material.

Es zeigen die 1, 2 und 3 schematisch die Erfindung und den Ablauf der Erfindung.It show the 1 , 2 and 3 schematically the invention and the process of the invention.

In 3 ist ein repariertes Bauteil 1 gezeigt, das im Inneren einen Hohlraum 2 aufweist, der durch zwei Wände 4, 5 begrenzt ist.In 3 is a repaired component 1 shown that there is a cavity inside 2 having, through two walls 4th , 5 is limited.

Durch den Einsatz war dieser Hohlraum 2 nach oben offen ( 1) und muss zur Reparatur wieder verschlossen werden.Through the use, this cavity was 2 open at the top ( 1 ) and must be closed again for repairs.

Daher wird gemäß 1 der Hohlraum 2 entsprechend vorbereitet und ein Schaum, insbesondere ein Lötschaum 13, insbesondere mittels Auftragschweißen aufgetragen, wobei der Lötschaum 13 die beiden Wände 4, 5 miteinander verbindet und so den Hohlraum 2 überbrückt.Therefore, according to 1 the cavity 2 prepared accordingly and a foam, especially a solder foam 13th , in particular applied by means of deposition welding, the solder foam 13th the two walls 4th , 5 connects with each other and so the cavity 2 bridged.

Der Lötschaum 13 hat eine Porosität von mindestens 10 vol.%, insbesondere von mindestens 20 vol.%.The solder foam 13th has a porosity of at least 10 vol.%, in particular of at least 20 vol.%.

Der Lötschaum 13 umfasst, besteht insbesondere aus einem Grundmaterial auf Nickelbasis, einem Lot auf Nickelbasis und einem Gasbildner. Die Schmelztemperatur von dem Grundmaterial auf Nickelbasis ist im Vergleich zu den anderen Komponenten des Lötschaums 13 am höchsten. Die Schmelztemperatur von dem Lot auf Nickelbasis ist niedriger als die des Grundmaterials, wobei der Unterschied in den Schmelzpunkten zwischen den zwei Komponenten des Lötschaums 13 mindestens 10K, insbesondere mindestens 20K beträgt.The solder foam 13th includes, consists in particular of a base material based on nickel, a solder based on nickel and a gas former. The melting temperature of the nickel-based base material is compared to the other components of the solder foam 13th the highest. The melting temperature of the nickel-based solder is lower than that of the base material, with the difference in melting points between the two components of the solder foam 13th is at least 10K, in particular at least 20K.

Der gasbildende Anteil siedet bei der Auftragstemperatur des Materials auf Nickelbasis.The gas-forming part boils at the application temperature of the nickel-based material.

Der Lötschaum weist auf, insbesondere besteht aus drei Pulverwerkstoffen, die in einem geeigneten Gemisch bei einem Schmelzvorgang einen Lötschaum generieren.The soldering foam has, in particular, consists of three powder materials which, in a suitable mixture, generate a soldering foam during a melting process.

Diese drei Pulverwerkstoffe sind beispielhaft:

  • • Pulverwerkstoff wie das Grundmaterial, eine Nickelbasis-Superlegierung oder artgleicher Werkstoff, aus dem auch die Turbinenschaufel besteht, wie insbesondere Rene80, Alloy 247, insbesondere mit einem Anteil von 85% - 94%;
  • • Pulverwerkstoff Lot, insbesondere ein borhaltiges Lot, das zum Engspaltlöten eingesetzt wird, insbesondere Amdry BRB, Amdry DF-4B, insbesondere mit einem Anteil von 5% -10%;
  • • Pulverwerkstoff, der bei einer Temperatur ähnlich der Schmelztemperatur gasförmig wird, insbesondere Strontiumcarbonat Siedepunkt: 1973K - das heißt 1973K werden an der Schmelzbadoberfläche benötigt, damit sich ein Gas ausbildet, insbesondere mit einem Anteil von 1% - 5%.
These three powder materials are exemplary:
  • • Powder material such as the base material, a nickel-based superalloy or material of the same type from which the turbine blade is also made, such as in particular Rene80, Alloy 247, in particular with a proportion of 85% - 94%;
  • • Powder material solder, in particular a boron-containing solder which is used for narrow gap soldering, in particular Amdry BRB, Amdry DF-4B, in particular with a proportion of 5% -10%;
  • • Powder material that becomes gaseous at a temperature similar to the melting temperature, especially strontium carbonate Boiling point: 1973K - that is, 1973K are required on the melt pool surface so that a gas is formed, in particular with a proportion of 1% - 5%.

Dann kann wie gewohnt metallisches Material 16 auf die äußeren und frei gebliebenen Oberflächen 10', 10' der Wände 4, 5 und über den Hohlraum 2 aufgetragen werden.Then metallic material can be used as usual 16 on the outer and remaining free surfaces 10 ' , 10 ' of the walls 4th , 5 and about the cavity 2 be applied.

In einem der letzten Schritte findet optional ein Hochtemperaturlöten statt, durch den der Schaum 13 verdichtet wird und/oder Risse verschlossen werden.In one of the last steps, high-temperature soldering takes place, through which the foam 13th is compacted and / or cracks are closed.

Das Material 16 unterscheidet sich deutlich von dem Schaum 13 oder Lötschaum 13.
„Deutlich unterschiedlich“ bedeutet, dass zumindest ein Legierungselement mehr oder weniger vorhanden ist und/oder sich der Gehalt zumindest eines Legierungselementes um mindestens 20% unterscheidet.The material 16 differs significantly from the foam 13th or solder foam 13th .
“Significantly different” means that at least one alloying element is more or less present and / or the content of at least one alloying element differs by at least 20%.

Der Aufbau mit dem Material 16 führt zu einem dichten Aufbau, d.h. hoher Dichte.The structure with the material 16 leads to a dense structure, ie high density.

Claims (7)

Verfahren zum Auftrag von Material über einen Hohlraum (2), bei dem ein Schaum (13), insbesondere ein Lötschaum (13), auf und zwischen zwei Wänden (4, 5) oder über den Hohlraum (2) aufgebracht wird, insbesondere mittels Auftragschweißen, so dass die Wände (4, 5) oder der Hohlraum (2) durch den Schaum (13) überbrückt sind, und dann in gewohnter Weise Auftrag vom Material (16), insbesondere durch eine Auftragschweißung, von Schaum (13) auf die Stirnseiten (10', 10") der Wände (4, 5) und auch über den Schaum (13) erfolgt, wobei optional als weiterer Schritt eine Wärmebehandlung als Hochtemperaturlötung bezüglich des Schaums (13) durchgeführt wird, wobei der Schaum (13) von dem Material (16) deutlich verschieden ist.Method of applying material through a cavity (2), in which a foam (13), in particular a soldering foam (13), is applied on and between two walls (4, 5) or over the cavity (2), in particular by means of build-up welding, so that the walls (4, 5) or the cavity (2) are bridged by the foam (13), and then application of the material (16) in the usual way, in particular by overlay welding, of foam (13) on the end faces (10 ', 10 ") of the walls (4, 5) and also over the foam (13), where optionally, as a further step, a heat treatment as high-temperature soldering is carried out with regard to the foam (13), wherein the foam (13) is clearly different from the material (16). Verfahren nach Anspruch 1, bei dem ein Pulverauftragschweißen, insbesondere Laserpulver-Auftragschweißen verwendet wird.Procedure according to Claim 1 , in which powder build-up welding, in particular laser powder build-up welding, is used. Repariertes Bauteil, das einen Hohlraum (2) aufweist, der durch einen Schaum (13) oder Lötschaum (13) überbrückt ist, auf dem (13) Material (16) als auch auf die freigebliebenen Stirnseiten (10', 10") der Wände (4, 5), die den Hohlraum (2) begrenzen, aufgetragen ist, wobei der Schaum (13) oder Lötschaum (13) von dem Material (16) deutlich verschieden ist.Repaired component, which has a cavity (2), which is bridged by a foam (13) or solder foam (13), on the (13) material (16) as well as on the exposed end faces (10 ', 10 ") of the walls (4, 5), which limit the cavity (2), is applied, wherein the foam (13) or solder foam (13) is clearly different from the material (16). Verfahren nach Anspruch 1 oder 2 oder Bauteil nach Anspruch 3, bei dem der Lötschaum (13) umfasst, insbesondere besteht aus: einem Grundmaterial auf Nickelbasis, insbesondere mit einem Anteil von 85 Gew.% - 94 Gew.%; einen Lot auf Nickelbasis, insbesondere mit einem Anteil von 5 Gew.% -10 Gew.%; wobei die Schmelztemperatur von dem Grundmaterial auf Nickelbasis im Vergleich zum Lot höher ist, wobei der Unterschied in den Schmelzpunkten mindestens 10K, insbesondere mindestens 20K beträgt; wobei ein Material vorhanden ist, das bei der Auftragung des Grundmaterials/Lots verdampft oder Gase bildet, insbesondere mit einem Anteil von 1 Gew.-% bis 5 Gew.-%.Procedure according to Claim 1 or 2 or component according to Claim 3 , in which the soldering foam (13) comprises, in particular consists of: a base material based on nickel, in particular with a proportion of 85% by weight - 94% by weight; a nickel-based solder, in particular with a proportion of 5% by weight -10% by weight; the melting temperature of the base material based on nickel being higher in comparison to the solder, the difference in the melting points being at least 10K, in particular at least 20K; wherein a material is present which evaporates or forms gases when the base material / solder is applied, in particular in a proportion of 1% by weight to 5% by weight. Verfahren oder Bauteil nach einem oder mehreren der Ansprüche 1, 2, 3 oder 4, bei dem Lötschaum (13) umfasst, insbesondere besteht aus: • einem Werkstoff wie das Grundmaterial, eine Nickelbasis-Superlegierung, aus dem auch die Turbinenschaufel besteht oder artgleicher Werkstoff, insbesondere Rene80, Alloy 247; • einem Lot, insbesondere ein borhaltiges Lot, das zum Engspaltlöten eingesetzt wird, insbesondere Amdry BRB, Amdry DF-4B; • einem Werkstoff, der bei einer Temperatur ähnlich der Schmelztemperatur der nickelbasierten Legierungen oder des Lots gasförmig wird, insbesondere Strontiumcarbonat, damit ein Gas sich bildet.Method or component according to one or more of the Claims 1 , 2 , 3 or 4th , in which the soldering foam (13) comprises, in particular consists of: • a material such as the base material, a nickel-based superalloy, of which the turbine blade is also made, or a material of the same type, in particular Rene80, Alloy 247; A solder, in particular a solder containing boron, which is used for narrow gap soldering, in particular Amdry BRB, Amdry DF-4B; • a material that becomes gaseous at a temperature similar to the melting temperature of nickel-based alloys or solder, in particular strontium carbonate, so that a gas is formed. Verfahren nach Anspruch 1, 2, 4 oder Bauteil nach Anspruch 3 oder 4, bei dem der Auftrag von dem Material (16) zu einem Materialaufbau von geringer Porosität führt und somit relativ zum Schaum (13) dichter, insbesondere mindestens 20% dichter, ausgebildet ist.Procedure according to Claim 1 , 2 , 4th or component according to Claim 3 or 4th , in which the application of the material (16) leads to a material build-up of low porosity and is thus made more dense, in particular at least 20% denser, relative to the foam (13). Verfahren nach Anspruch 1, 2, 4 oder 6 oder Bauteil nach Anspruch 3, 4 oder 6, bei dem die Porosität des Lötschaums (13) mindestens 10 vol.%, insbesondere mindestens 20 vol.% beträgt.Procedure according to Claim 1 , 2 , 4th or 6th or component according to Claim 3 , 4th or 6th , in which the porosity of the soldering foam (13) is at least 10 vol.%, in particular is at least 20 vol.%.
DE102019217711.5A 2019-11-18 2019-11-18 Application of material to a foam to close a cavity Withdrawn DE102019217711A1 (en)

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EP4295990A1 (en) * 2022-06-24 2023-12-27 ANSALDO ENERGIA S.p.A. Method for repairing blades of gas turbine engines

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DE10008257A1 (en) * 2000-02-23 2001-08-30 Alstom Power Schweiz Ag Baden Process for repairing a gas turbine component
US20150321289A1 (en) * 2014-05-12 2015-11-12 Siemens Energy, Inc. Laser deposition of metal foam
DE102016216721A1 (en) * 2016-09-05 2018-03-08 Siemens Aktiengesellschaft Method for additive production by means of porous auxiliary structure, component and device

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