Patent ID: 9051879
Filing Date: 2015-06-09
Classification: C23C,F02C,Y02T,Y10T

Abstract:
1. A method for forming a thermal barrier coating on a surface of a component having cooling holes, said method comprising: arranging masking pins in the cooling holes; blasting the surface of the component so as to coarsen the surface of the component in a state in which the masking pins are arranged in the cooling holes; forming the thermal barrier coating on the surface of the coarsened component by spray coating molten particles after said arranging of the masking pins and said blasting of the surface of the component; and chamfering the thermal barrier coating around the cooling holes in a state where the masking pins remain in the cooling holes after said forming of the thermal barrier coating, wherein the masking pins protrude above the surface of the component, and a protrusion amount of the masking pins is equal to a thickness of the thermal barrier coating, wherein the masking pins are made by punching out sheets of an elastic body of a silicone rubber or by forming with a metal mold, wherein the masking pins are not connected with each other, wherein said arranging of the masking pins comprises inserting the masking pins into the cooling holes, wherein the masking pin is a footed masking pin including a disc body and a cylindrical protruding pin which extends from the center of a bottom of the disc body, and wherein the diameter of the disc body is enlarged to be 5% to 10% larger than the diameter of the cooling hole.