Abstract: Disclosed is a coating for protecting a component against high temperatures and aggressive media, which coating has at least one subregion whose main constituent is chromium. The layer additionally comprises aluminum, the chromium content at least in the subregion in which chromium is the main constituent being greater than 30% by weight and the aluminum content being greater than or equal to 5% by weight. The invention further provides a process for producing such a coating, comprising chromizing the surface to be coated and subsequently alitizing the chromium-rich layer produced during chromizing.

Abstract: The invention relates to a method for producing a rotor or stator blade (1a) of a gas turbine, in particular an aircraft gas turbine (2), comprising forming a airfoil (8a) made of at least one first material and attaching a blade root (4a) made of at least one second material to the airfoil (8a) by means of a thermal spraying method. The invention further relates to a rotor or stator blade (1a) produced according to such a method.

Abstract: A method and device for the surface peening, especially ultrasonic shot-peening, of at least one partial element of a component of a gas turbine, is disclosed. The partial element, e.g., a sealing fin, and at least one surface of a vibration device impinging the blasting material are positioned relative to each other at an angle between 70° and 90° based on the direction of extension of the sealing fin.

Abstract: Disclosed is process for producing a protective layer for protecting a component against high temperatures and aggressive media. The process comprises forming a surface layer comprising aluminum and chromium on a surface of the component to be provided with the protective layer by chromizing and alitizing. The chromizing and/or the alitizing in different regions of the component surface to be protected is carried out simultaneously but differently to result in a protective layer that has different regions.

Abstract: Disclosed is a coating for protecting a component against high temperatures and aggressive media, which coating has at least one subregion whose main constituent is chromium. The layer additionally comprises aluminum, the chromium content at least in the subregion in which chromium is the main constituent being greater than 30% by weight and the aluminum content being greater than or equal to 5% by weight. The invention further provides a process for producing such a coating, comprising chromizing the surface to be coated and subsequently alitizing the chromium-rich layer produced during chromizing.

Abstract: A device for surface peening, in particular for ultrasonic shot peening, of a component of a gas turbine, having at least one vibration device that includes a surface that impinges the blasting material, and having a holding device by which a surface area of the component can be positioned relative to the surface of the vibration device, the surface of the vibration device being subdivided into at least two adjacent partial surfaces, each including an overlapping part by which a part of the surface area of the component can be treated by blasting material impinged both by the one and by the other partial surface.

Abstract: The invention relates to a method for producing a rotor or stator blade (1a) of a gas turbine, in particular an aircraft gas turbine (2), comprising forming a airfoil (8a) made of at least one first material and attaching a blade root (4a) made of at least one second material to the airfoil (8a) by means of a thermal spraying method. The invention further relates to a rotor or stator blade (1a) produced according to such a method.

Abstract: A device for surface blasting, e.g., for ultrasonic shot blasting, components, e.g., gas turbine components, includes at least one vibrator having an oscillating surface, e.g., having at least one ultrasonic sonotrode, the or each oscillating surface of the or each vibrator being adjoined by a machining chamber for receiving a section to be blasted of the component to be machined. The machining chamber is bounded in its cross-section by at least three sides, e.g., by at least two substantially vertical sides and by at least one substantially horizontal side. At least the substantially vertical sides of the machining chamber are formed by oscillating surfaces of in each case one vibrator.

Abstract: In a method for production of a corrosion resistant and/or oxidation resistant coating, at least one metal of the platinum group or an alloy thereof is galvanically deposited onto a surface of a substrate, and thereafter the thusly galvanically coated substrate is aluminized. In a first stage of the galvanic deposition process a current magnitude applied for the galvanizing is increased continuously or step-wise beginning from an initial value up to a maximum value, and in a second stage of the galvanic deposition process the current magnitude applied for the galvanizing is maintained constant at the maximum value. The galvanic deposition of the or each metal of the platinum group or the corresponding alloy may be carried out using an open-celled or open-mesh or porous anode.

Abstract: A method and device for the surface peening, especially ultrasonic shot-peening, of at least one partial element of a component of a gas turbine, is disclosed. The partial element, e.g., a sealing fin, and at least one surface of a vibration device impinging the blasting material are positioned relative to each other at an angle between 70° and 90° based on the direction of extension of the sealing fin.

Abstract: A device for surface peening, in particular for ultrasonic shot peening, of a component of a gas turbine, having at least one vibration device that includes a surface that impinges the blasting material, and having a holding device by which a surface area of the component can be positioned relative to the surface of the vibration device, the surface of the vibration device being subdivided into at least two adjacent partial surfaces, each including an overlapping part by which a part of the surface area of the component can be treated by blasting material impinged both by the one and by the other partial surface.

Abstract: A component having a corrosion-resistant and/or oxidation-resistant coating is provided that includes at least one platinum-aluminum substrate area is provided, the component having a substrate surface (11) and a substrate composition based on nickel, with a platinum-aluminum substrate area (12) formed in the area of the substrate surface of the component by precipitating platinum (Pt) and aluminum (Al) on the substrate surface. The platinum-aluminum substrate area (12) has a two-phase structure or duplex structure with finely dispersed platinum-aluminum deposits in a nickel-based mixed crystal in an outer zone (13), and a single-phase structure made of a nickel-based mixed crystal in an inner zone (14) located between the substrate surface (11) of the component and the outer zone (13).

Abstract: A method for producing metallic components, and metallic components produced by the method, particularly for turbo machines, having small edge radii, is disclosed. The method includes mechanical and/or electrochemical machining of a component while producing a small edge radius and solidifying the small edge radius by ultrasonic shot peening. As a result of the method, the disadvantages of the prior art are avoided and a machine process that can be automated has been provided, the method permitting considerable savings of time and labor and leading to reproducible results.

Abstract: An apparatus for surface blasting gas turbine blades in the area of their blade roots includes a vibrator with an oscillating surface oriented so that the oscillating surface extends essentially in the horizontal direction. A processing chamber for receiving the blade root adjoins the oscillating surface. The processing chamber is embodied such that the turbine blade is orientable, during the blasting, with a profiled support surface of the blade root extending at least temporarily essentially parallel to the oscillating surface of the vibrator.

Abstract: A component having a corrosion-resistant and/or oxidation-resistant coating is provided that includes at least one platinum-aluminum substrate area is provided, the component having a substrate surface (11) and a substrate composition based on nickel, with a platinum-aluminum substrate area (12) formed in the area of the substrate surface of the component by precipitating platinum (Pt) and aluminum (Al) on the substrate surface. The platinum-aluminum substrate area (12) has a two-phase structure or duplex structure with finely dispersed platinum-aluminum deposits in a nickel-based mixed crystal in an outer zone (13), and a single-phase structure made of a nickel-based mixed crystal in an inner zone (14) located between the substrate surface (11) of the component and the outer zone (13).

Abstract: The invention relates to a method for production of a corrosion resistant and/or oxidation resistant coating, whereby at least one metal of the platinum group, in particular platinum and/or palladium, or an alloy based on at least one metal of the platinum group, is deposited by galvanizing onto a surface of a substrate, and whereby thereafter an aluminizing of the thusly galvanically coated substrate is carried out. According to a first aspect of the invention, the galvanic deposition of the or each metal of the platinum group or the corresponding alloy is carried out in an at least two-staged deposition process, whereby in a first stage of the deposition process a current magnitude applied for the galvanizing is increased continuously or step-wise beginning from an initial value up to a maximum value, and whereby in a second stage of the deposition process the current magnitude applied for the galvanizing is maintained constant at the maximum value.

Abstract: A process for gas diffusion coating of metallic components; in which a component surface which is to be coated is brought into contact with a metal halide as coating gas, to form a diffusion layer with a defined layer thickness and a defined coating metal content in % by weight in the component surface, working on the basis of a nominal concentration of the metal halide at the component surface which, at a defined coating temperature, leads to a defined coating time, wherein a first concentration, which is higher than the nominal concentration, for the metal halide is established for a first time, and at least one second concentration, which is at or below the nominal concentration, is established at the component surface for at least one second time, the first and the at least one second time being selected in such a way that their sum is shorter than the coating time with the nominal concentration. Also disclosed is a device for the process.

Abstract: The invention relates to a method and an apparatus for the surface blasting, especially for the ultrasonic shot peening, of gas turbine blades in the area of their blade roots. The apparatus encompasses at least one vibrator, especially at least one ultrasonic sonotrode (12), comprising an oscillating surface (13), whereby the or each vibrator is oriented in such a manner so that the oscillating surface (13) of the or each vibrator extends essentially in the horizontal direction, whereby a processing chamber (14), for receiving the or each blade root (15) to be processed, adjoins the or each oscillating surface (13).

Abstract: A device for surface blasting, e.g., for ultrasonic shot blasting, components, e.g., gas turbine components, includes at least one vibrator having an oscillating surface, e.g., having at least one ultrasonic sonotrode, the or each oscillating surface of the or each vibrator being adjoined by a machining chamber for receiving a section to be blasted of the component to be machined. The machining chamber is bounded in its cross-section by at least three sides, e.g., by at least two substantially vertical sides and by at least one substantially horizontal side. At least the substantially vertical sides of the machining chamber are formed by oscillating surfaces of in each case one vibrator.

Abstract: A process for coating hollow bodies, in which a powder mixture including a metal donor powder, an inert filler powder and an activator powder including a metal halide is provided, the powder mixture is brought into contact with an inner surface, which is to be coated, of the hollow body and is heated, in which process, in order to increase the internal layer thicknesses, the inert filler powder is provided with a mean particle size which is approximately the same as the mean particle size of the metal donor powder.