Inhibiting coke formation by heat treating in nitrogen atmospher

Details Inhibiting coke formation by heat treating in nitrogen atmospher Inhibiting coke formation by heat treating in nitrogen atmospher

1991-12-20

1994-03-29

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148237, 148238, C23C 824

Patent

active

052980910

ABSTRACT:
A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces. The method includes heating at a temperature of 1800-1850 F. for about one hour, cooling to 1525-1575 F. and holding for about four hours, and cooling to a temperature of 1375-1425 F. and holding for about 16 hours.

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