THERMALLY SPRAYED FILM WITH SLURRY-EROSION RESISTANCE, AND MACHINE MEMBER FOR FLUID HAVING THERMALLY SPRAYED FILM

摘要

PROBLEM TO BE SOLVED: To provide a thermally sprayed film superior in slurry-erosion resistance having a suitable area rate of hard particles, which has been determined on the basis of a relation between the area rate and a wear rate of the film.;SOLUTION: The thermally sprayed film with slurry-erosion resistance 2a to 2c including a ceramic and a metal, which has been bonded to the surface of a substrate 1 with thermal spraying, has the hard particles of the ceramic on the surface of the film at the area rate of 25-50%. An impeller provided with a hub and several blades circumferentially attached around the hub at a distance, has the thermally sprayed film with the slurry-erosion resistance deposited on at least one part of the surface of the impeller, wherein the film has the hard particles of the ceramic on the surface at the area rate of 25-50%.;COPYRIGHT: (C)2004,JPO