Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1975-06-27
1977-12-20
Lanham, C. W.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75226, 75221, 291568R, 291568B, 294205, 75200, B22F 312, B22F 314, B22F 504
Patent
active
040639398
ABSTRACT:
A process for making a composite integral turbine wheel and the like, consisting of a plurality of blade elements of an airfoil shape connected at their inner ends to the periphery of a sintered rotor or hub and metallurgically bonded thereto. In accordance with the practice of the process, a plurality of identical blade elements in a final machined condition are inserted in a mold at accurate circumferentially-spaced intervals therearound and are disposed such that the inner root sections thereof extend inwardly of a mold cavity defining the rotor profile. The mold cavity is filled with metal powder composed of a high-strength, temperature-resistant alloy, and sintered into a coherent mass in a manner to effect a metallurgical bonding of the sintered rotor section to the individual blade elements. The resultant integral assembly is thereafter isostatically pressed at an elevated temperature for a period of time to effect a further densification of the sintered rotor section to a density approaching 100 percent theoretical density.
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Reichman Steven H.
Weaver Don M.
Crane Daniel C.
Lanham C. W.
Special Metals Corporation
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