Method and apparatus for coating or heat treatment of blisks for aircraft gas turbines

摘要

A method for hard-material coating or heat treatment of the blade airfoils of blisks for gas turbines provides for partial heat-insulation and cooling of the other blisk parts during the respective process to prevent their properties from being changed by the high temperatures. The apparatus required for this method comprises two or more cooling plates ( 5 to 7 ) which are thermally insulated on their outer surfaces and include supporting flanges ( 20 ) which heat-conductively locate the blade platforms ( 3 ) of the blisks ( 1 ). Radially extending cooling medium channels ( 16 ) are provided in the cooling plates connected to a cooling medium source to continually apply cooling medium to the inner surfaces of the supporting flanges and the blade platforms.