Removing refractory materials from components

Details Removing refractory materials from components Removing refractory materials from components

B - Operations, Transporting

22

D

22/166, 149/5

B22D 29/00 (2006.01) B22C 1/00 (2006.01) B22C 9/10 (2006.01)

Patent

CA 1174949

ABSTRACT A method of removing refractory material from a component comprises contacting the refractory material with a chemically active agent whereby to convert the refractory material to a more easily removable substance, and removing the more easily removable substance. The method enables alumina cores defining cooling passages In cast blades for use in gas turbine engines to be removed practically useful rates.

386987

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