| 摘要 |
1291927 Making turbine blades GENERAL ELECTRIC CO 27 Jan 1970 [17 July 1969] 3906/70 Heading B3A [Also in Division Fl] A method of making a contoured article, e.g. a hollow turbine or compressor blade 20 comprises; providing at least first and second members 30, 32, each in mill stock shape and each having an inner surface 30b, 32b and an outer surface 30a, 32a. Each member is formed so that its outer surface approximates to a portion of the outer surface of the blade and the inner surfaces are prepared so that their shapes match one another. The members are assembled with their inner surfaces in juxtaposition, Fig. 4 (not shown). The members are next separated and selected material is removed from at least one of the members at its inner surface to form hollow portions 24. The members are then reassembled and bonded at their inner surfaces. The assembly is preferably formed by hot creep forming and the bonding is performed by high temperature solid state diffusion bonding. The blade aerofoil member 22 is provided with a base 26 and platform members 28, which are prepared and bonded together and to the aerofoil in the same way as the members 30, 32. The blade material may be a titanium alloy. |
