Alstom Technology Limited

Ansaldo Energia IP UK Limited

General Electric Technology Gmbh

Ansaldo Energia Switzerland Ag

Daniel Beckel

Alexander Stankowski

Thomas Etter

Piero-Daniele Grasso

Jaroslaw Leszek Szwedowicz

Guenter Ambrosy

Thomas Opderbecke

Daniel Reitz

Sophie Betty Claire Duval

A method for post-weld heat treatment of a without a filler material welded high strength component made of a gamma prime (&#x3b3;') strengthened superalloy can include providing the welded component, heating the welded component by applying a rapid heating-up rate in the range of 20&#xb0; C./min to 40&#xb0; C./min during the entire temperature range from room temperature (RT) up to a temperature Tof at least 1000&#xb0; C., holding the welded component at Tand then heating the component by applying a slow heating-up rate of about 5&#xb0; C./min to a final temperature T, then holding the welded component at Tfor a time tsufficient for at least partially dissolving the gamma prime phase in a weld of the welded component and also in a base material surrounding the weld, and cooling the component with a cooling rate that is greater than or equal to about 20&#xb0; C./min.

Method for post-weld heat treatment of welded components made of gamma prime strengthened superalloys

In a Ni-based, Co-based, or Ni&#x2014;Co-based braze alloy () for high-temperature brazing of components () of modular structure and for repairing damaged components () which are formed of single crystal or directionally solidified superalloys using said braze alloy (), the braze alloy has a first metallic powder component () having particle sizes in the nanometer range and a second metallic powder component () having particle sizes in the micrometer range. The surface of the particles of the second powder component () is thinly coated with particles of the first powder component (). The braze alloy () additionally includes grain boundary stabilizing elements as alloying elements. In addition, melting point depressants can be present in the braze alloy () in a commercially common quantity or with a considerably increased proportion. Both the melting temperature of the braze alloy () and the probability of recrystallization are advantageously reduced.

Braze alloy for high-temperature brazing and methods for repairing or producing components using a braze alloy

An amorphous braze foil () produced by a melt-spin process has an upper side and a lower side. The upper side and the lower side are thinly coated with a film of metallic Ni-based, Co-based, or Ni&#x2014;Co-based braze powder () with a particle size in the nanometer range, wherein both the braze foil () and also the braze powder () additionally include grain boundary stabilizing elements as alloying elements. In addition, melting point depressants can be present in the braze foil or in the nano braze powder () in a commercially common quantity or with a considerably increased proportion. With the braze foil () coated in this manner, both the melting temperature of the braze material and also the probability of recrystallization are advantageously reduced when brazing in the adjacent base material ().

Braze foil for high-temperature brazing and methods for repairing or producing components using a braze foil

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Wettingen, Switzerland

Daniel Beckel