United Technologies Corporation

Wayne K Armstrong

Peter J Draghi

Norman Pietruska

John R Naumec

A repair coating for superalloy articles, such as gas turbine engine components, includes a volatile organic carrier or water-based carrier, a fluxing agent, a thickening agent, balance a filler mix. The filler mix consists of at least two distinct particulate components. The mix includes a first particulate component having a composition which approximates that of the article being repaired. The mix also includes a second particulate component having a composition approximating that of the article and a melting point depressant, such as boron. This melting point depressant is substantially in excess of that in the article and sufficient to provide melting of a portion of the mix at a processing temperature below the melting temperature of the article. The above filler mix is blended with the other constituents to form the repair coating which is applied to an article. A series of heating/cooling cycles is performed to ensure that the repair cooling properly melts, wets, and bonds to the article and that the melting point depressant diffuses into the article.

Method of repairing surface and near surface defects in superalloy

A lightweight tool coupling device for coupling a tool shank to a drive spindle is disclosed. A tool coupling housing is rigidly secured to the drive spindle and includes spring biased plungers which cooperate with axial grooves on the tool shank to prevent rotational movement of the shank relative to the drive spindle.

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Meriden, CT, United States of America

Wayne K Armstrong