Siemens Aktiengesellschaft

Mtu Aero Engines Ag

Mtu Aero Engines Gmbh

Rolls-royce Deutschland Ltd & Co. Kg

Seimens Aktiengesellschaft

Neue Materialien Furth Gmbh

Friedrich-alexander-universitat-erlangen-nurngerg

Robert Singer

Andreas Volek

Michael Ott

Ralf Rettig

Winfried Esser

Sebastian Piegert

Uwe Paul

Paul Heinz

Thomas Goehler

Steffen Neumeier

Carolin Korner

Peter Randelzhofer

Ernst Affeldt

Jürgen Preuhs

Eckart Schumann

Volker Vosberg

Jan Steinbach

Ursula Pickert

Matthias Oechsner

Dirk Goldschmidt

Andreas Meyer

Jörn Grossmann

Alfred Scholz

Gerhard Grotzschel

Adolf Donner

Jurgen Ewald

Peter Krug

Naicheng Sheng

Mathias Goeken

Ernst Fleischmann

Florian Pyczak

Michael Weiss

Frank Heinrich

Harald Helmer

Uwe Glatzel

Beate Seiler

Rainer Voelkl

Ralf Bürgel

Katharina Horke

Wolfgang Hermann

Hael Mughrabi

A method for the thermal treatment of a component, in particular a metal powder injection molded component (MIM component) including a nickel base alloy, wherein, after sintering, in particular immediately after sintering, in the injection molding process, the component is exposed for a predetermined holding time to at least one treatment temperature below the sintering temperature. A component, in particular an MIM component, and to an aircraft engine.

Thermal treatment method for metal injection molding parts, a metal injection molding part and an aircraft engine

The invention relates to a nickel-based alloy having a microstructure with a matrix of &#x3b3;-phase and precipitates of &#x3b3;'-phase. The &#x3b3;&#x2032;-phase comprises a percentage by volume of from 50 vol % to 80 vol % in the temperature range of from 1000&#xb0; C. to 1100&#xb0; C. The nickel-based alloy comprises 8 to 13 at % aluminum, 3 to 14 at % cobalt, 4 to 12 at % chromium, 0.6 to 8 at % molybdenum, 0 to 6 at % rhenium, 0.5 to 4 at % tantalum, 0.5 to 4 at % titanium, 0.3 to 3.5 at % tungsten, 0 to 4 at % germanium, 0 to 0.6 at % hafnium, 0 to 4 at % ruthenium, balance nickel and unavoidable impurities. The concentrations of molybdenum and tungsten are selected such that the percentage X of molybdenum and tungsten in the &#x3b3;-phase, X=0.84 C+C, is greater than 5.5 at % at a temperature of from 1000&#xb0; C. to 1100&#xb0; C., Cand Cbeing the concentrations of molybdenum and tungsten in at %.

Nickel-based alloy with optimized matrix properties

A nickel-base superalloy is disclosed. The superally includes aluminum, cobalt, chromium, molybdenum, tantalum, titanium and tungsten, in addition to nickel, as alloy constituents, wherein rhenium can additionally be contained and the rhenium content is less than or equal to 2 wt. % and wherein the titanium content is greater than or equal to 1.5 wt. %. Further disclosed is a component made of the nickel-base superalloy.

Rhenium-free or rhenium-reduced nickel-base superalloy

Disclosed is a nickel base alloy which is substantially free of rhenium and has a solidus temperature of more than 1320&#xb0; C. Precipitates of a &#x3b3;'-phase are present in a &#x3b3;-matrix with a fraction of 40 to 50 vol % at 1050&#xb0; C. to 1100&#xb0; C., and a &#x3b3;/&#x3b3;&#x2032; mismatch at 1050&#xb0; C. to 1100&#xb0; C. is from &#x2212;0.15% to &#x2212;0.25%. The alloy comprises 11 to 13 at % aluminum, 4 to 14 at % cobalt, 6 to 12 at % chromium, 0.1 to 2 at % molybdenum, 0.1 to 3.5 at % tantalum, 0.1 to 3.5 at % titanium, 0.1 to 3 at % tungsten. The tungsten content of the &#x3b3;-matrix is greater than that in the precipitated &#x3b3;&#x2032;-phases.

Creep-resistant, rhenium-free nickel base superalloy

A germanium containing nickel-based solder having a similar composition to a nickel-based superalloy is provided. As a result of which the proportion of &#x3b3;' formed in the solder is reduced. The solder also includes chromium, cobalt, molybdenum, tungsten, aluminum, and titanium. A component including the solder is also provided.

Germanium-containing solder, a component comprising a solder and a process for soldering

Cobalt-based solder alloys are proposed. The cobalt-based solder alloys have germanium. The germanium has a higher melting point than nickel-based alloys such that the germanium is used advantageously for repairing or treating components having the nickel-based alloys used at high temperatures. The components are repaired or treated by soldering using the cobalt-based solder alloys.

Cobalt-based alloy comprising germanium and method for soldering

Many known solder alloys according to prior art utilize silicon or boron as melting point reducers, which, however, form brittle phases that have an undesirable effect on the thermo-mechanical properties. The invention relates to a solder ally that comprises gallium and/or germanium, preferably forms the Y' phase and has improved mechanical properties.

Solder alloys for repairing a component

In one aspect, a repair method for repairing components comprising a base material with a directed microstructure is provided. The repair is performed in such a way that the repaired location correspondingly has a directed microstructure like the surrounding base material. A solder is applied in the region of a location to be repaired and is soldered to the component via heat exposure, a temperature gradient, i.e., for instance a temperature variation from a higher temperature to a lower temperature, is thereby produced in the region of the location to be repaired.

Process for repairing a component comprising a directional microstructure by setting a temperature gradient during the laser heat action, and a component produced by such a process

The invention relates to a method for repairing components that consist of a superalloy. The method comprises the following steps: a solder material is applied to the repair site; the repair site with the applied solder material is heated until the latter melts; and the melted solder material is left to solidify. A powder blend, whose average composition corresponds to the component alloy constitutes the solder material, the blend comprising at least one elementary powder of the component alloy as one powder type and/or a pre-alloy of the component alloy.

Method for repairing cracks in components and solder material for soldering components

The invention relates to a method for repairing components comprising a base material with an oriented microstructure, wherein the repair point comprises a correspondingly oriented microstructure as the surrounding base material. According to the inventive method, solder is applied in the region of a point which is to be repaired and is soldered to the component by means of a heating effect produced by a device. A temperature gradient, i.e., approximately a temperature characteristic, is produced during the heating effect, said temperature characteristic ranging from a high to a low temperature in the region of the point which is to be repaired.

Repair soldering method for repairing a component which comprises a base material with an oriented microstructure

A method for the repair of a component by a solder is disclosed. The method is performed under specifically selected vacuum conditions in order to prevent oxidation and vaporization.

Method for the soldering repair of a component in a vacuum and an adjusted partial oxygen pressure

A high-temperature component made of a nickel super-alloy has the following composition in wt %: 11&#x2013;13% of Cr, 3&#x2013;5% of W, 0.5&#x2013;2.5% of Mo, 3&#x2013;5% of Al, 3&#x2013;5% of Ti, 3&#x2013;7% of Ta, 1&#x2013;5% of Re and a remainder formed of nickel. A corresponding component which is also provided is formed of an alloy having a composition essentially similar to that mentioned above, but with the rhenium proportion replaced with 0.1&#x2013;5 wt % of ruthenium.

High-temperature-resistant component and process for producing the high-temperature-resistant component

Method for producing a moulded body from foamed metal

A method for producing a composite structure in which a foamed metal core ( ) is surrounded with a metal body ( ). The method includes the following steps: a) producing a foamed metal core ( ) with an essentially closed surface; b) introducing the foamed metal core ( ) into a pressure die-casting mold; c) filling the pressure die-casting mold at a first casting pressure (p ); d) reducing the first casting pressure (p ) before the pressure die-casting mold has been filled; e) filling the pressure die-casting mold entirely, the first casting pressure (p ) being reduced to zero or almost zero; and f) applying a second casting pressure (p ) and maintaining the second casting pressure for a predetermined holding period.

Method for producing a composite structure with a foamed metal core

In a method for removing tin from a surface and/or from a region close to the surface of a component part, the component part has a concentrated aqueous sodium hydroxide or concentrated hydrochloric acid flowing in contact with it at a temperature which is distinctly higher than room temperature. Preferably, the temperature is approximately 220.degree. C., and the component part is moreover subjected to a positive pressure of 5.5 bar. The method is suitable for a component part fabricated through the use of unidirectional solidification and liquid-metal cooling, in particular a turbine blade.

Method for removing tin

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Erlangen, Germany

Robert Singer