Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1987-12-21
1989-07-25
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
291568B, 419 10, 419 47, 428552, 428553, 428564, B22F 700
Patent
active
048511889
ABSTRACT:
An abrasive, wear resistant layer is applied to the tip surface of a superalloy gas turbine blade by high temperature sintering operation which produces a high strength bond between the layer and the blade, minimizes gamma prime phase growth, and prevents recrystallization in the blade. Important features of the invention include removing plastic strain damage from the tip surface prior to the sintering operation, using induction heating techniques to sinter a layer of metal powder particles and ceramic particulates to the blade tip surface, and shielding the airfoil and root portion of the blade from the radiant heating source during the sintering operation while at the same time, conductively removing heat from the blade.
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Gustafson Walter F.
Rutz David A.
Schaefer Robert P.
Taylor Kenneth E.
Lechert Jr. Stephen J.
Rashid James M.
United Technologies Corporation
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