Preforms suit gas turbines
A
Morgan Advanced Ceramics product story
Edited by the Engineeringtalk editorial team
Dec 9, 2005
Wesgo Metals Division of Morgan Advanced Ceramics develops pre-sintered preforms (PSP) for high-temperature braze repair of industrial gas turbines.
The Wesgo Metals Division of Morgan Advanced Ceramics has developed pre-sintered preforms (PSP) for high-temperature braze repair of industrial gas turbines.
Unlike traditional repair methods, such as welding and the use of brazing paste and green tape, pre-sintered preforms have a porosity of less than 2%, thereby eliminating shrinkage.
This, combined with unlimited shelf-life, reduces costs associated with replacement parts and labour.
PSPs are customised to fit the shape of the component, tack welded into place and then the whole assembly is brazed in a vacuum furnace to reduce distortion.
They are for dimensional restoration and crack repairs and are available in various shapes including tapered and cylindrical forms with thickness from 0.38 to 1.77mm.
Unlike flat preforms, cylindrical performs do not sag or overflow during brazing so are suitable for restoring holes and bores.
Created using a mix of superalloy and low melting point braze alloy, pre-sintered preforms provide increased wear for components exposed to the high temperatures and corrosive gases generated by gas turbine engines.
Once brazed, components require little grinding to restore them to their original dimensions.
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