A method of increasing the reliability of creep loaded components in particular turbine blades

摘要

The reliability of a set of components, e.g. turbine blades or pipe bends, is increased by subjecting the components already creep-loaded to a hot isostatic pressing. Preferably, creep pores and cracks are closed by the hot isostatic pressing. The dissociation behaviour of alloy elements may be altered by the hot isostatic pressing with respect to homogenization and refinement of deposits. In a particular embodiment, a coating is broken by the hot isostatic pressing where outer base metal cracks are not closed in order to locate cracks for the purpose of component rejection.