摘要:
A method of rehabilitating or remediating a structure comprises forming a sealed region (18) over or about a portion of the structure and drawing air from the region (18). A supply of a structural adhesive is placed in fluid communication with region (18) so that as air is drawn from the region (18) the adhesive flows into the region and fills discontinuities in the structure. Fibre reinforcement or other strengthening material is placed in the region (18) so that the adhesive also penetrates through the material to bsnd the material to the structure.
摘要:
Die Erfindung betrifft ein Verfahren zum Beschichten oder Entschichten eines Bauteils, insbesondere eines Gasturbinenbauteils, wobei zum bereichsweisen bzw. teilweisen Beschichten oder Entschichten eines Bauteils das Bauteil vorzugsweise vollständig mit einem Abdeckmedium abgedeckt wird, und wobei das Abdeckmedium ausschließlich von den Oberflächenbereichen des Bauteils, in welchen das Beschichten oder das Entschichten des Bauteils erfolgen soll, entfernt wird, sodass ein nicht zu beschichtender bzw. nicht zu entschichtender Oberflächenbereich des Bauteils vom Abdeckmedium abgedeckt ist. Erfindungsgemäß erfolgt das Entfernen des Abdeckmediums durch Wasserstrahlen.
摘要:
A method for applying a diffusion coating of a substance to a portion of substrate comprising applying a deposition coating to a particular surface of an object by applying an active gas containing the coating substance in a form which will react with the surface to form a coating. Instead of masking portions of the object not to be coated, or applying an absorbent paste, a second neutralizing or “killer” gas is introduced in the regions where the coating gas may be present, but where no coating is desired. The neutralizing gas is of a type which will reduce the reactivity of the coating substance in the active gas. As a result, formation of a coating in undesired areas is substantially prevented.
摘要:
A deposition process including applying an inoculant (50) to at least a portion (12a) of the surface (12) of a metal component (10), and then forming an intermetallic layer (60, 70, 100) at the inoculant surface (12), such as by exposing at least the coated surface portion (12a) to a deposition environment (26).
摘要:
Low alloy steels are made resistant to hot sulfidation first decarburizing then chromizing then aluminizing, either in independent operations or run together in a single retort.
摘要:
A novel dual layer mask formulation is provided. In particular, the mask has a unique composition that protects the integrity of an underlying chromide coating, prevents chromium depletion from the chromide coating and prevents a subsequent aluminide coating from being deposited thereon.
摘要:
Unique and improved chromizing processes are disclosed. The processes involve forming localized chromizing coatings onto selected regions of a substrate. The chromium diffusion coatings are locally applied to selected regions of substrates in a controlled manner, in comparison to conventional chromizing processes, and further in a manner that produces less material waste and does not require masking. A second coating can be selectively applied onto other regions of the substrate.
摘要:
A method and apparatus for forming a coating on a surface of a superalloy substrate area of a gas turbine engine component, and the component produced by the method, includes providing a slurry with selected metal powders suspended in a silane containing solution, applying the slurry by brushing, spraying or 3D printing using a piezoelectric dot matrix printhead to the superalloy substrate, drying the applied slurry, and depending on the aluminum content desired in the coating, including a sufficient amount of aluminum in the slurry or aluminiding the coated component. The method and apparatus can be used to obtain components having different superalloy coating thicknesses or compositions in different areas of the component based on the particular operating environment for each area with a single heat treatment and/or aluminiding cycle for obtaining the different coatings.
摘要:
A presente invenção refere-se a um membro metálico de um sistema móvel - tal como, um anel de pistão (1) - que é submetido a um processo de fabricação que consiste basicamente em uma única etapa, que é configurada para: o endurecimento superficial do membro metálico, através de técnicas, simultaneamente à aplicação de laser sobre pelo menos uma porção da superfície deste membro metálico.