Product category:
Manual oxy-fuel gas cutting, welding, brazing soldering and cutting
News Release from: Morgan Technical Ceramics | Subject: Preforms - high temperature braze repair turbines
Edited by the Manufacturingtalk Editorial
Team on 09 December 2005
Pre-sintered preforms reduce turbine
repair costs
Pre-sintered preforms - with unlimited 'shelf-life' - result in time and cost savings for industrial gas turbine repair and have a porosity of less than 2%, thereby eliminating shrinkage.
The Wesgo Metals Division of Morgan Advanced Ceramics has developed a range of 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 article was originally published on Manufacturingtalk on 30 Mar 2004 at 8.00am (UK)
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An approved OEM and designated repair process in the aeroengine industry for more than 10 years, 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 minimise distortion.
They are designed for both dimensional restoration and crack repairs and are available in various shapes including tapered and cylindrical forms with thickness ranging from 0.38mm (0.015in) to 1.77mm (0.070in).
Unlike flat preforms cylindrical performs do not sag or overflow during brazing so are ideal 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 only minimal grinding to restore them to their original dimensions.
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