摘要:
A method of repairing an article includes removing an undesirable section of the article (42), attaching a repair section (44) to the article at a location from which the undesirable section has been removed, and mechanically working the repair section (46) to achieve a reduction in a cross-sectional area of the repair section.
摘要:
A method of repairing an article includes removing an undesirable section of the article (42), attaching a repair section (44) to the article at a location from which the undesirable section has been removed, and mechanically working the repair section (46) to achieve a reduction in a cross-sectional area of the repair section.
摘要:
A refractory metal core for use in a casting system has a coating for providing oxidation resistance during shell fire and protection against reaction/dissolution during casting. In a first embodiment, the coating comprises at least one oxide and a silicon containing material. In a second embodiment, the coating comprises an oxide selected from the group consisting of calcia, magnesia, alumina, zirconia, chromia, yttria, silica, hafnia, and mixtures thereof. In a third embodiment, the coating comprises a nitride selected from the group consisting of silicon nitride, sialon, titanium nitride, and mixtures thereof. Other coating embodiments are described in the disclosure.
摘要:
A non-destructive inspection method for detecting the presence of a contaminant that has alloyed with a metallic alloy of a part includes exposing the metallic alloy of the part to an extraction solution. The extraction solution extracts at least a portion of any of the contaminant that has alloyed with the metallic alloy. The extraction solution can then be analyzed to determine whether the solution includes any of the contaminant element, which indicates whether the part includes any of the contaminant element.
摘要:
A fixture for use in the final machining operation of the integral bladed rotor (IBR) of a gas turbine engine comprises a rigid ring (12) for surrounding the outer periphery of the IBR (14) and supporting tapered pins (16) that fit into the space between the blades (20) and then molded therein with a plaster or plastic medium for securing the unit to the IBR for enhancing its structural integrity. The method of finishing the airfoils of the IBR includes inserting the pins in alternate spaces and working half of the blade surfaces in the pinless spaces and then removing the pins and inserting pins in the previously worked spaces and then molding the pins in place. The other half of the bladed surface is then worked in the pinless spaces until the airfoils are finally contoured. The unit is removed and heated to melt the residual cast medium to produce the finished product.
摘要:
A dynamic compaction process comprises forming first and second preforms (16, 18). Forming each preform (16, 18) includes utilizing a container having an interior and an exterior. Filling the interior of the container with a powder material (20, 22); sealing the container; subjecting the exterior of the container to an instantaneous dynamic compaction, forming a solid powder metallurgy preform (16, 18) encased by the container. The container gets removed from each preform (16, 18). The process includes inserting the first and second preforms (16, 18) in another container (30) in a predefined pattern (31); the predefined pattern (31) aligns the first and second preforms (16, 18) creating an interface (28). The process includes inserting a backstop (46) against the predefined pattern (31) in this container (30); subjecting the exterior of this container (30) to an instantaneous dynamic compaction. The process includes bonding the first preform (16) and second preform (18) along the interface (28) to form a component precursor (10); and removing the container (30) from the precursor (10). Another step includes processing the precursor (10) into components (58).
摘要:
A method for repairing, refurbishing, or replacing a turbine engine component or sub-component includes the steps of providing a turbine engine component or sub-component having a site to be repaired, refurbished, or replaced providing a repair or replacement material having a sulfur content, which sulfur content is less than 10 ppm, and applying the repair or replacement material to the site on the turbine engine component to effect the repair, the refurbishment, or the replacement.