Maintenance technologies for gas turbines

摘要

The hot gas parts of a gas turbine are susceptible to damage such as thermal stress cracks and hot oxidation within a short operating time due to the high temperature of the combustion gas. From the standpoint of gas turbine preventivemaintenance, it is therefore most important to know the cause of such damage.Toshiba has been developing life assessment and long life technologies for hot gas parts based on the evaluation of damage. In this paper, the latest repair technologies and performance improvement methods for gas turbines are described.