Shroud welding help

["Steve Averka" <saverka@charter.net>]

Kris

One of the processes my shop does is TIG welding.  We fix turbine engine
parts and we're an FAA approved repair station.

We have found that cleaning, by grit blasting, with 240 grit aluminum oxide
will contaminate the base metal.  The force associated by blasting at 60psi
is enough to imbed particles of the aluminum oxide into Inconel and other
high temp alloys.

You can try to clean up the shroud by hand grinding the mating surfaces that
you are welding.

Steve Averka
56 100M