Method for coating cooling holes

摘要

The method involves providing an outer coating (22) on the outer surface (4) of the component (1,120,130). An inner coating is provided on an inner surface (25,25') within the hole (7). The coating nozzle is set on the inner coating within the hole at a different angle to that of the coating of the outer surface around the hole, when spray angles for the outer coating and inner coating relate to the outer surface. The inner coating is performed using mixture of chromium aluminum iron cobalt nickel yttrium silicon hafnium.