Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Chromalloy Gas Turbine Corporation

Silke Settegast

Thomas Beck

Nigel-Philip Cox

Jan Münzer

Ingo Reinkensmeier

Ingo Berger

Ramesh Subramanian

Georg Bostanjoglo

Eckart Schumann

Arturo Flores Renteria

Volker Vosberg

Ralf Förster

Reiner Anton

Lutz Wolkers

Andre Jeutter

Karsten Klein

Robert Herfurth

Christian Menke

Jacek Grodzki

Ulrich Laudien

Rüstü Söl

Rolf Wilkenhoener

A turbine blade has a blade tip, a cooling structure with cooling channels which are designed to have cooling fluid passed through them in order to cool the turbine blade during operation, an end section at a lower level than that of the blade tip, and an outer wall section extending up to the blade tip. The cooling structure is formed between the end section and the blade tip. A method produces a cooling structure of this type.

Turbine blade comprising a cooling structure and associated production method

There are a multiplicity of methods of making through-holes. In particular in the production of a multiplicity of film-cooling holes, as in gas turbine blades or combustion chamber elements, small time advantages are also important when making a hole. The method according to the invention, to make the hole close to the final contour in each case in sections in a top and a bottom region in order to then produce the final contour with other laser parameters, achieves time advantages.

Method for producing a hole

Conventionally coated components with film cooling holes are known, comprising a diffuser, extending through the layers into the substrate. According to the invention, the component is embodied such that the whole diffuser is largely arranged in the layer.

Component having a film cooling hole

The invention relates to a method for electrical discharge machining of electrically non-conductive material in which a layer of an electrically conductive substance is applied as an auxiliary electrode on the electrically non-conductive material. Said method is characterized in that the electrically conductive substance is chemically converted by oxidative heat treatment after electrical discharge machining.

Method for electrical discharge machining of electrically non-conductive material

There is described a method for producing a hole using e.g. a lasers, wherein short laser pulse durations are used. The laser pulse durations are varied, short laser pulse durations being utilized only in the area to be removed in which an influence on the penetration behavior and discharge behavior is noticeable while longer pulse durations of &#x3e;0.4 ms are used. This is the case for the inner surface of a diffuser of a hole, for example, which can be produced very accurately by means of short laser pulse durations.

A method in which no voids occur during the soldering processes is provided. A component with a soldering material is heated using a first temperature plateau for a first time duration such that the solder material is completely melted. Each subsequent heating is at a temperature plateau with a temperature that is lower than a temperature of the previous plateau.

Method for soldering with a multistep temperature profile

In soldering processes according to prior art, there is often an insufficient tie-up to a substrate of a component. A method in which no voids occur during the soldering processes is provided. A temperature pattern is proposed according to the method in which the temperature is lowered successively during the soldering operation.

It is known from the prior art that holes in a workpiece are filled completely with a solder powder, which leads especially in the case of large holes to the formation of cracks within the solder due to the large volume filled in once the solder cools off after soldering. The invention provides a method for closing a recess of a workpiece, which allows closing an opening of a recess without the risk of crack formation, by using only a solder film for closing the recess. The solder film has a content of non-melting material and therefore is substantially less prone to form cracks.

Workpiece with a recess which is closed from the exterior by means of a solder film and method for closing a recess by means of a solder film

A method is used for laser welding a workpiece along a welding line. At least two laser beams, which are offset in relation to one another, are guided along the welding line by moving an optical deflector unit. The method may be used for welding closure pins and casting induced openings of gas turbine blades.

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Berlin, Germany

Silke Settegast