摘要:
A method (8) for brazing a surface (10) of a metallic substrate (12) having a generally passive metal oxide layer (18) including steps for activating said surface (10) of said metallic substrate (12) by machining said metallic substrate (12) with a hard metal tool, grit blasting powdered particles (14) of an activating material on said surface (10), and wetting the grit blasted surface (10) of the metallic substrate (12) with a filler material (16) at a brazing temperature, wherein said activating material is reactive with said metal oxide layer (18) at said brazing temperature.
摘要:
The invention relates to a coating method (10) for applying a cover layer (17) to a base material (16). A solder positioned on a surface of the base material (16) is heated (13) until it is molten, for joining the solder to the base material (16) in a heat treatment (12). According to the invention, oxygen is diffused (14) in the molten lot for forming a diffusion layer (18) in the cover layer (17). The invention also relates to a component (21) for a steam turbine.
摘要:
The invention relates to a method for applying a wear protection layer (4) to a continuous flow machine component which has a base material (3) comprising titanium, having the following steps: mixing a solder (12) which comprises an alloy (6) comprising titanium and particles which are distributed in the alloy (6) and have a reaction agent (5); applying the solder (12) to predetermined points of the continuous flow machine component; introducing a heat volume into the solder (12) and the continuous flow machine component so that the alloy (6) becomes liquid and the reaction agent (5) changes through diffusion processes with the solder and undergoes a chemical reaction with the alloy (6), forming a hard aggregate (8); and cooling the solder (12) so that the alloy (6) becomes solid.
摘要:
The invention relates to a method of manufacturing a hot-gas component (20) with cooling channels (25) and a hot gas component (20) manufactured by the said method. Pre-sintered preform materials are used for the manufacturing of a hot-gas component (20) with a cooling channel (25). The method initially involves providing a carrier substrate (22) for the hot-gas component (20) and then providing a sheet (24) of pre-sintered preform material. The sheet (24) is then arranged on the carrier substrate (22) so as to form the cooling channel (25). The sheet (24) and the carrier substrate (22) are then brazed to manufacture the hot-gas component (20) with the cooling channel (25).
摘要:
The invention relates to a method for repairing surface damage to a turbomachine component that has a base material (7) which has titanium (the base material having TiAl6V4 and/or pure titanium). The method has the following steps: mixing a solder that has a titanium-containing alloy and a powder which is distributed in the solder and which has the base material; applying the solder onto turbomachine component areas where the surface damage is located; introducing a quantity of heat into the solder and into the turbomachine component such that the alloy liquefies and the areas are thus wetted; and cooling the solder such that the alloy solidifies.