摘要:
A method for replacing a portion of a gas turbine engine rotor blade, the rotor blade having a contour defined by a blade first sidewall (70) and a blade second sidewall (70) includes cutting through the rotor blade such that a cut line (110) extends from a leading edge (74) of the blade to a trailing edge (76) of the blade, and between the first sidewall and the second sidewall, removing the portion of the rotor blade that is radially outward of the cut line, and coupling a replacement blade portion (120) to remaining blade portion (98) such that the newly formed rotor blade (150) is formed with a predetermined aerodynamic contour.
摘要:
A workpiece structure (40) having a hole (52) therein is repaired by preparing a stack (42) having a first confinement sheet (44), a first donor sheet (46), a workpiece structure (40) having a hole (52) therein, a plug (66) of a plug material in the hole (52), optionally a second donor sheet (64), and a second confinement sheet (47). The first confinement sheet (44), the first donor sheet (46), the second donor sheet (64), and the second confinement sheet (47) each overlie the hole (52). The first confinement sheet (44) and the second confinement sheet (47) each melt at a temperature greater than do the first donor sheet (46), the plug (66), and the second donor sheet (64). The stack (42) is locally heated at the hole (52) using an electrical current source to a temperature sufficiently high to locally melt the first donor sheet (46), the plug (66), the second donor sheet (64), and the workpiece structure (40). The stack (42) is thereafter cooled to solidify all melted material and form a weldment.
摘要:
A process for repairing a compressor rear frame of a gas turbine engine. The process entails removing a seal flange (118) from the inner casing wall (12) of the frame (10) to define an annular face (130) on the casing wall (12), and fabricating a replacement flange (118) to have an annular face (132) with a radial width greater than the radial width of the annular face (130) of the casing wall (12). The faces (130,132) of the flange (118) and wall (12) are mated to form a joint (122), a penetration-enhancing flux (128) is deposited adjacent the joint (122), and a single-pass gas tungsten arc welding operation is performed to form a root weldment (124) that extends completely through the joint (122). The flux (128) is then removed and a gas tungsten arc welding operation is performed to deposit a filler on the root weldment (124) and form a second weldment that completely overlays but does not penetrate through the root weldment (124).
摘要:
A process for repairing a compressor rear frame of a gas turbine engine. The process entails removing a seal flange (118) from the inner casing wall (12) of the frame (10) to define an annular face (130) on the casing wall (12), and fabricating a replacement flange (118) to have an annular face (132) with a radial width greater than the radial width of the annular face (130) of the casing wall (12). The faces (130,132) of the flange (118) and wall (12) are mated to form a joint (122), a penetration-enhancing flux (128) is deposited adjacent the joint (122), and a single-pass gas tungsten arc welding operation is performed to form a root weldment (124) that extends completely through the joint (122). The flux (128) is then removed and a gas tungsten arc welding operation is performed to deposit a filler on the root weldment (124) and form a second weldment that completely overlays but does not penetrate through the root weldment (124).
摘要:
A fusion welding method is provided for fusion welding at juxtaposed interface surfaces (24,28) a first member (22), for example made of a first metal based on at least one of Ru, Rh, Pd, and Pt, with a second member (26) made of a second metal, for example a high temperature alloy based on at least one of Fe, Co, and Ni, including at least one identified element, for example Al, that can form a continuous layer of a brittle intermetallic compound with the first metal that is free of such element. With the interface surfaces (24,28) disposed in contact, energy is generated at the interface surfaces (24,28) in a combination of an amount and for a first time selected to be sufficient to heat the interface surfaces (24,28) to a fusion welding temperature. However, the first time is less than a second time that enables formation at the fusion welding temperature of the continuous layer of the brittle intermetallic compound at the interface surfaces (24,28). A welded article is provided with a fusion weld free of such continuous layer of the brittle intermetallic compound.
摘要:
A fan blisk, including a disk (12), a plurality of circumferentially spaced apart airfoils (16) extending radially outwardly from the disk (12), a plurality of shroud segments (18) being disposed circumferentially between the plurality of airfoils (16) and configured to attach to a corresponding airfoil of the plurality of airfoils (16) and a plurality of wear surfaces (22), where at least one wear surface of the plurality of wear surfaces (22) is configured and disposed to prevent excessive wear between the adjacent shroud segments (18). Each shroud segment of the plurality of shroud segments (18) may be attached to a corresponding airfoil (16) by weld connections (20) to permit clearance during translation friction welding of the airfoil (16) to the disk (12) hub are located to avoid high stress areas.