CLEAN ATMOSPHERE HEAT TREATMENT METHOD AND APPARATUS FOR COATED TURBINE COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for heat treating at least one coated workpiece, such as a coated turbine engine component. SOLUTION: The method including injecting a gas at a workpiece center location 20 and applying heat comprises the steps of: cleaning a furnace to be used during the heat treatment method and diffusion heat treating the at least one workpiece in a gas atmosphere with gas being injected at the work piece center location 20. After the diffusion heat treatment step, the coated workpiece may be subjected to a surface finishing operation such as a peening operation. An apparatus 10 for heat treating the workpiece comprises the furnace and a means for injecting a gas into an interior of the furnace at a workpiece center location 20. COPYRIGHT: (C)2005,JPO&NCIPI