DE102015205080A1 - Reinforced grain boundaries in a welded area, process and component - Google Patents
Reinforced grain boundaries in a welded area, process and component Download PDFInfo
- Publication number
- DE102015205080A1 DE102015205080A1 DE102015205080.7A DE102015205080A DE102015205080A1 DE 102015205080 A1 DE102015205080 A1 DE 102015205080A1 DE 102015205080 A DE102015205080 A DE 102015205080A DE 102015205080 A1 DE102015205080 A1 DE 102015205080A1
- Authority
- DE
- Germany
- Prior art keywords
- substrate
- component
- welded area
- job
- nickel
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/26—Alloys of Nickel and Cobalt and Chromium
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
Abstract
Durch eine vollständige Lösungsglühung und eine anschließende langsame Abkühlung bis zu einer Temperatur, bei der sich Karbide ausscheiden, entstehen gezackte Korngrenzen im auftragsgeschweißten Bereich, der dadurch eine höhere Kriechbeständigkeit aufweist.Complete solution annealing followed by slow cooling to a carbide precipitating temperature results in serrated grain boundaries in the electrodeposited area, thereby providing greater creep resistance.
Description
Die Erfindung betrifft eine Wärmebehandlung von einem Bereich der aufgeschweißt wurde, um die Festigkeit zu erhöhen und ein Bauteil. The invention relates to a heat treatment of a region which has been welded on in order to increase the strength and a component.
Zur Reparatur von Turbinenlaufschaufeln wird oft als Reparaturverfahren ein Laserpulverauftragsschweißen eingesetzt, welches zur Reparatur der Plattformseitenfläche sowie zur Reparatur der Schaufelspitze eingesetzt wird. Allerdings wäre es insbesondere für die Plattformseitenfläche wünschenswert, eine erhöhte Kriechbeständigkeit in den auftragsgeschweißten Bereichen einzustellen. For repair of turbine blades, a laser powder deposit welding is often used as a repair method, which is used to repair the platform side surface and to repair the blade tip. However, especially for the platform side surface, it would be desirable to set increased creep resistance in the job-welded areas.
Bislang wurde eine reduzierte Kriechbeständigkeit im Plattformbereich nach dem Auftragsschweißen in Kauf genommen, da kein alternativer Werkstoff, der mit vertretbarer Aufbaurate zu verarbeiten ist, zur Verfügung steht. So far, a reduced creep resistance in the platform area has been accepted after build-up welding, since no alternative material that can be processed with a reasonable build-up rate is available.
Es ist daher Aufgabe der Erfindung oben genanntes Problem zu lösen. It is therefore an object of the invention to solve the above-mentioned problem.
Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1 und ein Bauteil nach Anspruch 7. The object is achieved by a method according to claim 1 and a component according to claim 7.
In den Unteransprüchen sind weiter vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen. In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.
Es zeigt die Figur eine Liste von Superlegierungen. The figure shows a list of superalloys.
Die Figur und die Beschreibung stellen nur Ausführungsbeispiele der Erfindung dar. The figure and the description represent only embodiments of the invention.
Es wird vorgeschlagen, nach dem Auftragsschweißen eine Wärmebehandlung durchzuführen, die zu gezackten Korngrenzen im aufgeschweißten Bereich führt. Eine solche Wärmebehandlung setzt voraus, dass die γ‘-Solvustemperatur oberhalb derjenigen der Korngrenzenkarbide wie insbesondere M23C6 bzw. M6C liegt. Der auftragsgeschweißte Bereich weist vorzugsweise eine Nickel- oder Kobalt-basierte Superlegierung auf. It is proposed to carry out a heat treatment after the build-up welding, which leads to serrated grain boundaries in the welded area. Such a heat treatment presupposes that the γ 'solvus temperature is above that of the grain boundary carbides, in particular M23C6 or M6C. The electrodeposited area preferably comprises a nickel or cobalt based superalloy.
Gezackte Korngrenzen bilden sich während einer langsamen Abkühlung knapp unterhalb der γ‘-Solvustemperatur aus. Bei IN 738 liegt das bei 1403K ± 10%. Serrated grain boundaries are formed during slow cooling just below the γ'-solvus temperature. For IN 738 this is 1403K ± 10%.
Zunächst muss der Werkstoff insbesondere vollständig lösungsgeglüht werden. Für IN 738 liegt dies bei 1413K ± 10%. First of all, the material must be completely solution-annealed. For IN 738 this is 1413K ± 10%.
Anschließend, insbesondere direkt anschließend, an die Lösungsglühung wird eine kontrollierte langsame Abkühlung vorzugsweise über mindestens 120K bis auf 1293K ± 10% (bei IN 738) mit 0,5K/min durchgeführt. Ab 1293K bilden sich bei IN 738 M23C6-Karbide, die das Ausbauchen der Korngrenzen unterbinden. Subsequently, in particular directly afterwards, to the solution annealing a controlled slow cooling is preferably carried out over at least 120K up to 1293K ± 10% (at IN 738) with 0,5K / min. Starting at 1293K, IN 738 forms M23C6 carbides that prevent bulging of the grain boundaries.
Durch die gezackten Korngrenzen wird die Kriechbeständigkeit in den auftragsgeschweißten Bereichen, die insbesondere reparierte Bereiche darstellen, signifikant verbessert, da sich der Korngrenzengleitanteil reduziert. The serrated grain boundaries significantly improve creep resistance in the job-welded areas, which are particularly repaired areas, as the grain boundary slip rate is reduced.
Es ergeben sich folgende Vorteile:
- • Verlängerung der Lebensdauer dadurch
- • Reduzierte Kosten des Bauteils im Lebenszyklus.
- • Extension of the service life
- • Reduced cost of the component in the life cycle.
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015205080.7A DE102015205080A1 (en) | 2015-03-20 | 2015-03-20 | Reinforced grain boundaries in a welded area, process and component |
PCT/EP2016/055490 WO2016150752A1 (en) | 2015-03-20 | 2016-03-15 | Strengthened grain boundaries in a welded area, method and component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015205080.7A DE102015205080A1 (en) | 2015-03-20 | 2015-03-20 | Reinforced grain boundaries in a welded area, process and component |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102015205080A1 true DE102015205080A1 (en) | 2016-09-22 |
Family
ID=55646536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102015205080.7A Withdrawn DE102015205080A1 (en) | 2015-03-20 | 2015-03-20 | Reinforced grain boundaries in a welded area, process and component |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102015205080A1 (en) |
WO (1) | WO2016150752A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69126083T2 (en) * | 1990-09-28 | 1997-11-20 | Chromalloy Gas Turbine Corp | Process for welding high-strength nickel-based superalloys |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7653995B2 (en) * | 2006-08-01 | 2010-02-02 | Siemens Energy, Inc. | Weld repair of superalloy materials |
US9528175B2 (en) * | 2013-02-22 | 2016-12-27 | Siemens Aktiengesellschaft | Pre-weld heat treatment for a nickel based superalloy |
-
2015
- 2015-03-20 DE DE102015205080.7A patent/DE102015205080A1/en not_active Withdrawn
-
2016
- 2016-03-15 WO PCT/EP2016/055490 patent/WO2016150752A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69126083T2 (en) * | 1990-09-28 | 1997-11-20 | Chromalloy Gas Turbine Corp | Process for welding high-strength nickel-based superalloys |
Also Published As
Publication number | Publication date |
---|---|
WO2016150752A1 (en) | 2016-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R163 | Identified publications notified | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |