Gas turbine rotor stage and rotor blade with coated rotor blade root and method for coating such a rotor blade root

摘要

A rotor blade (12) for a gas turbine engine rotor stage (10) is provided and comprises an airfoil (22) with a blade root (24) attached thereto and an aluminium bronze alloy wear resistant coating consisting essentially of 9.0 - 11.0% aluminium (Al), 0.0 - 1.50% iron (Fe), and a remainder of copper (Cu).