| 摘要 |
PURPOSE: A stator vane assembly for turbine and method for forming assembly is provided to eliminate or minimize distortion in the welds and obtain a high strength joint. CONSTITUTION: Turbine vane segments(10,12) having outer and inner bands and a vane extending therebetween are welded one to the other by E-beam welding along their adjoining margins and from the outside of the bands. The adjoining margins on the hot gas path sides of the outer and inner bands are chamfered, TIG-welded and machined to provide a smooth, continuous gas path surface. An aft hook(28) of each segment is cut back to provide inset faces(47,48,50,52) in a radially projecting flange and a flange extending axially from the radial flange. A filler piece having a body shaped to correspond to the shape of the space between the inset faces of the radial flange is E-beam welded to the radial flange. Gaps between a tongue on the filler piece and the inset faces of the axially extending flange are provided with weld filler material and TIG-welded to complete the welding of the aft hook. |
