High speed water-based abrasive two-phase flow finishing of irregular gas film holes on metal based ceramic coated blades

In order to improve the inner wall finishing effect of metal-based ceramic coated blade shaped air holes for the safety and stability of the blade this paper is based on the new high-speed water-based abrasive two-phase flow polishing technology, the laser processing of metal-based ceramic coated blade shaped air holes for the finishing experiments, and to analyze the surface quality of ceramic-coated area of air holes before and after the polishing of the different processes, the surface roughness of the inner wall, and the port dimensional accuracy. With the gradual increase of the polishing pressure from 4 MPa to 5 MPa, the surface quality of the inner wall of the ports of the air-membrane holes increases and then decreases, and the chamfer size of the ports of the air-membrane holes and the enlarged size of the holes gradually increase. When the abrasive pressure is 4.5 MPa, the remelted layer of the inner wall of the gas film hole has been completely removed, the surface roughness reaches the lowest, and there is basically no destructive effect on the metal-ceramic heterogeneous transition interface. Finally, it is concluded that the two-phase flow of high-speed water-based abrasive particles has a better finishing effect on the metal-based ceramic coating of shaped air film holes, and is basically non-destructive to the metal-ceramic heterogeneous transition interface.