Siemens Aktiengesellschaft

Diffusion Alloys Limited

Andre Jeutter

Ralph Reiche

Norbert Czech

Rolf Wilkenhöner

Adrian Kempster

Silke Settegast

Helge Reymann

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

The invention relates to a method for removing an area of a layer of a component consisting of metal or a metal compound. According to prior art, corrosion products of a component are removed in a first step by applying a molten mass or by heating in a voluminous powder bed. This requires high temperatures or a large amount of space. The inventive method for removing corrosion products of a component is characterized in that a cleaning agent is applied locally, which removes the corrosion products by means of a gaseous reaction product.

Method for removing at least one area of a layer of a component consisting of metal or a metal compound

A method is directed toward decoating a parent body, provided with an anti-corrosion coating, of a turbine blade. An outer part of the anti-corrosion coating is removed abrasively by a water jet. An inner part of the anti-corrosion coating is then removed chemically. This combination permits efficient and cost-effective decoating of the turbine blade.

Method of decoating a turbine blade

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Grafenau, Germany

Andre Jeutter