Abstract:
The invention relates to a method for producing a diffusion blocking layer (1) comprising aluminum oxide (8) on a metal plate (2), which consists of a base material (3) which contains at least iron (Fe) and chromium (Cr). The aluminum (10) required for forming the aluminum oxide (8) is contained in the base material (3). A layer made of titanium dioxide (4) serves as an oxygen contributor for the oxidation of the aluminum (10) to α-aluminum oxide. The invention further relates to an integration of said method into the production of an exhaust gas treatment unit (12), wherein the exhaust gas treatment unit (12) has a honeycomb body (13) and a housing (14) and at least the honeycomb body (13) or the housing (14) is formed with a metal plate (2) and the metal plate (2) consists of a base material (3) which contains at least iron (Fe) and chromium (Cr). According to the invention, the metal plate (2) comprises a surface layer (7) at least in one sub-region (5) which comprises at least aluminum oxide (8) and titanium oxide (9).
Abstract:
The present invention relates to a method and an apparatus (2) for mobile repair of a stationary rotor seals (1) of a turbo machine basically carrying out the following steps, - 3D-scanning of the stationary seal (1), - generation of 3D-model of the stationary seal (1), - removing of the damaged spots (6) of the seal (1) my means of laser cutting, - and generating a new seal (1) at the repair spot (14) by use of a second process head (13), which generates the seal (1) by laser powder cladding. One advantage of the method and the apparatus according to the invention is the reduction of costs and the down time, which is necessary to renew the seals (1).
Abstract:
A method and apparatus for brazing a honeycomb sealing (14) at a turbine, in particular a gas turbine, include: applying a brazing filler material (18) to the honeycomb sealing (14), placing the honeycomb sealing (14) at a turbine component (10), directing a laser beam (20) to the brazing filler material (18), and melting the brazing filler material (18) by means of the laser beam (20) for bonding the honeycomb sealing (14) to the turbine component (10).
Abstract:
The invention relates to a method for glueing and soldering a honeycomb structure comprising at least one partially structured foil (2) with a pitch (P) and a wave height (W). Said method comprises the following steps: choosing a mean solder diameter of a powder solder, said diameter being 15% smaller than the height of the wave; determining a minimum thickness of the glue strip (B) according to equation (I); glueing the at least partially structured foil within the width of the glue strip on at least part of the wave crests formed by the undulation; soldering the honeycomb structure. The invention also relates to a corresponding honeycomb structure which ensures satisfactory joint connections even when said structure is used in the exhaust systems of automobiles.