摘要:
A refractory, oxidation-resistant, and corrosion-resistant protective coating for application to a substrate, in particular for application to parts of turbines or aircraft propulsion engines, is described, including a spray coating made of a thermally sprayed, primarily metallic material, the coating being at least partially subjected to a thermochemical aluminum (Cr, Si) deposition process having a specifically high aluminum deposition activity after the application of the protective coating to the substrate, in such a way that the protective coating has alloy gradients of Al (Cr, Si) which increase from the substrate surface to the coating surface and isolated globulitic metal oxide particles. Furthermore, a method for manufacturing this protective coating and its use are described.
摘要:
A refractory, oxidation-resistant, and corrosion-resistant protective coating for application to a substrate, in particular for application to parts of turbines or aircraft propulsion engines, is described, including a spray coating made of a thermally sprayed, primarily metallic material, the coating being at least partially subjected to a thermochemical aluminum (Cr, Si) deposition process having a specifically high aluminum deposition activity after the application of the protective coating to the substrate, in such a way that the protective coating has alloy gradients of Al (Cr, Si) which increase from the substrate surface to the coating surface and isolated globulitic metal oxide particles. Furthermore, a method for manufacturing this protective coating and its use are described.
摘要:
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.
摘要:
A method for removing a layer made of a first material from a surface of a body made of a second material is disclosed. The body is subjected to a pressurized jet containing a blasting medium composed of particles, where the pressurized jet at least intermittently has an Almen intensity of at most 0.35 Almen A, preferably at most 0.3 Almen A and particularly preferably at most 0.25 Almen A.
摘要翻译:公开了一种从由第二材料制成的主体表面去除由第一材料制成的层的方法。 经受包含由颗粒组成的喷射介质的加压射流,其中加压射流至少间歇地具有至多0.35Almen A的Almen强度,优选至多0.3Almen A,特别优选至多0.25 Almen A.
摘要:
A method for producing a high-temperature protective layer containing metal on a metallic high-temperature material is disclosed. The metal is deposited on the high-temperature material via the gaseous phase to form the high-temperature protective layer. The high-temperature material is held at a diffusion temperature for a specific length of time so that at least a portion of the deposited metal is diffused into the high temperature material to form a diffusion zone and where the high-temperature material is not in contact with solids or liquids in the region of the surface to be coated, but merely has a solid/gas interface. Also disclosed is a component made of a high-temperature material with a hot-gas anti-corrosive layer containing chromium. There is a coating layer containing chromium applied to the surface of the high-temperature material, a diffusion layer in the high-temperature material, and a build-up zone between the coating layer and the diffusion layer.
摘要:
A coating, in particular for gas turbine components produced of a superalloy, is disclosed. The coating has an outer layer and an inner layer. The outer layer constitutes 10% to 60% of the overall coating and is substantially made of a β-NiAl phase having an Al proportion between 23 and 35 percent by weight. The inner layer constitutes 90% to 40% of the overall coating and is substantially made of a γ-NiAl phase having an Al proportion of a maximum of 15 percent by weight.
摘要:
A method for removing a layer made of a first material from a surface of a body made of a second material is disclosed. The body is subjected to a pressurized jet containing a blasting medium composed of particles, where the pressurized jet at least intermittently has an Almen intensity of at most 0.35 Almen A, preferably at most 0.3 Almen A and particularly preferably at most 0.25 Almen A.
摘要翻译:公开了一种从由第二材料制成的主体表面去除由第一材料制成的层的方法。 经受包含由颗粒组成的喷射介质的加压射流,其中加压射流至少间歇地具有至多0.35Almen A的Almen强度,优选至多0.3Almen A,特别优选至多0.25 Almen A.
摘要:
The invention is directed to a method for producing a corrosion-resistant and oxidization-resistant layer that is applied onto a component part, whereby the method can be simply and cost-beneficially implemented in fabrication-oriented terms and comprises the steps: a) producing a slip by mixing powder containing at least one of the elements Cr, Ni or Ce with a binding agent; b) applying the slip onto the component part; c) drying the slip at temperatures from room temperature through 300° C.; and d) alitizing the slip layer.
摘要:
Cast structural components of nickel alloys are heat treated by heating to a temperature above the incipient melting temperature of the carbidic .gamma./.gamma.' eutectic phase, whereby homogenizing and complete solution annealing of the material structure is acheived. Thereafter, the resultant fusion pores are closed at low temperature.
摘要:
A method for coating a turbine blade of a gas turbine is disclosed. The method includes applying a lacquer coat to a region of the turbine blade, where the lacquer coat includes chromium particles and/or chromium alloy particles, halides, and a binding agent. The method further includes drying the applied lacquer coat at a temperature between 50° C. and 600° C. with disintegration of the binding agent and subsequent reactive connection at a temperature between 900° C. and 1160° C.